--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/gcc.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,8082 @@
+/* Compiler driver program that can handle many languages.
+   Copyright (C) 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+   Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+/* This program is the user interface to the C compiler and possibly to
+other compilers.  It is used because compilation is a complicated procedure
+which involves running several programs and passing temporary files between
+them, forwarding the users switches to those programs selectively,
+and deleting the temporary files at the end.
+
+CC recognizes how to compile each input file by suffixes in the file names.
+Once it knows which kind of compilation to perform, the procedure for
+compilation is specified by a string called a "spec".  */
+
+/* A Short Introduction to Adding a Command-Line Option.
+
+   Before adding a command-line option, consider if it is really
+   necessary.  Each additional command-line option adds complexity and
+   is difficult to remove in subsequent versions.
+
+   In the following, consider adding the command-line argument
+   `--bar'.
+
+   1. Each command-line option is specified in the specs file.  The
+   notation is described below in the comment entitled "The Specs
+   Language".  Read it.
+
+   2. In this file, add an entry to "option_map" equating the long
+   `--' argument version and any shorter, single letter version.  Read
+   the comments in the declaration of "struct option_map" for an
+   explanation.  Do not omit the first `-'.
+
+   3. Look in the "specs" file to determine which program or option
+   list should be given the argument, e.g., "cc1_options".  Add the
+   appropriate syntax for the shorter option version to the
+   corresponding "const char *" entry in this file.  Omit the first
+   `-' from the option.  For example, use `-bar', rather than `--bar'.
+
+   4. If the argument takes an argument, e.g., `--baz argument1',
+   modify either DEFAULT_SWITCH_TAKES_ARG or
+   DEFAULT_WORD_SWITCH_TAKES_ARG in gcc.h.  Omit the first `-'
+   from `--baz'.
+
+   5. Document the option in this file's display_help().  If the
+   option is passed to a subprogram, modify its corresponding
+   function, e.g., cppinit.c:print_help() or toplev.c:display_help(),
+   instead.
+
+   6. Compile and test.  Make sure that your new specs file is being
+   read.  For example, use a debugger to investigate the value of
+   "specs_file" in main().  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "multilib.h" /* before tm.h */
+#include "tm.h"
+#include <signal.h>
+#if ! defined( SIGCHLD ) && defined( SIGCLD )
+#  define SIGCHLD SIGCLD
+#endif
+#include "xregex.h"
+#include "obstack.h"
+#include "intl.h"
+#include "prefix.h"
+#include "gcc.h"
+#include "flags.h"
+#include "opts.h"
+
+/* By default there is no special suffix for target executables.  */
+/* FIXME: when autoconf is fixed, remove the host check - dj */
+#if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX)
+#define HAVE_TARGET_EXECUTABLE_SUFFIX
+#endif
+
+/* By default there is no special suffix for host executables.  */
+#ifdef HOST_EXECUTABLE_SUFFIX
+#define HAVE_HOST_EXECUTABLE_SUFFIX
+#else
+#define HOST_EXECUTABLE_SUFFIX ""
+#endif
+
+/* By default, the suffix for target object files is ".o".  */
+#ifdef TARGET_OBJECT_SUFFIX
+#define HAVE_TARGET_OBJECT_SUFFIX
+#else
+#define TARGET_OBJECT_SUFFIX ".o"
+#endif
+
+static const char dir_separator_str[] = { DIR_SEPARATOR, 0 };
+
+/* Most every one is fine with LIBRARY_PATH.  For some, it conflicts.  */
+#ifndef LIBRARY_PATH_ENV
+#define LIBRARY_PATH_ENV "LIBRARY_PATH"
+#endif
+
+#ifndef HAVE_KILL
+#define kill(p,s) raise(s)
+#endif
+
+/* If a stage of compilation returns an exit status >= 1,
+   compilation of that file ceases.  */
+
+#define MIN_FATAL_STATUS 1
+
+/* Flag set by cppspec.c to 1.  */
+int is_cpp_driver;
+
+/* Flag set to nonzero if an @file argument has been supplied to gcc.  */
+static bool at_file_supplied;
+
+/* Flag saying to pass the greatest exit code returned by a sub-process
+   to the calling program.  */
+static int pass_exit_codes;
+
+/* Definition of string containing the arguments given to configure.  */
+#include "configargs.h"
+
+/* Flag saying to print the directories gcc will search through looking for
+   programs, libraries, etc.  */
+
+static int print_search_dirs;
+
+/* Flag saying to print the full filename of this file
+   as found through our usual search mechanism.  */
+
+static const char *print_file_name = NULL;
+
+/* As print_file_name, but search for executable file.  */
+
+static const char *print_prog_name = NULL;
+
+/* Flag saying to print the relative path we'd use to
+   find libgcc.a given the current compiler flags.  */
+
+static int print_multi_directory;
+
+static int print_sysroot;
+
+/* Flag saying to print the relative path we'd use to
+   find OS libraries given the current compiler flags.  */
+
+static int print_multi_os_directory;
+
+/* Flag saying to print the list of subdirectories and
+   compiler flags used to select them in a standard form.  */
+
+static int print_multi_lib;
+
+/* Flag saying to print the command line options understood by gcc and its
+   sub-processes.  */
+
+static int print_help_list;
+
+/* Flag saying to print the sysroot suffix used for searching for
+   headers.  */
+
+static int print_sysroot_headers_suffix;
+
+/* Flag indicating whether we should print the command and arguments */
+
+static int verbose_flag;
+
+/* Flag indicating whether we should ONLY print the command and
+   arguments (like verbose_flag) without executing the command.
+   Displayed arguments are quoted so that the generated command
+   line is suitable for execution.  This is intended for use in
+   shell scripts to capture the driver-generated command line.  */
+static int verbose_only_flag;
+
+/* Flag indicating how to print command line options of sub-processes.  */
+
+static int print_subprocess_help;
+
+/* Flag indicating whether we should report subprocess execution times
+   (if this is supported by the system - see pexecute.c).  */
+
+static int report_times;
+
+/* Nonzero means place this string before uses of /, so that include
+   and library files can be found in an alternate location.  */
+
+#ifdef TARGET_SYSTEM_ROOT
+static const char *target_system_root = TARGET_SYSTEM_ROOT;
+#else
+static const char *target_system_root = 0;
+#endif
+
+/* Nonzero means pass the updated target_system_root to the compiler.  */
+
+static int target_system_root_changed;
+
+/* Nonzero means append this string to target_system_root.  */
+
+static const char *target_sysroot_suffix = 0;
+
+/* Nonzero means append this string to target_system_root for headers.  */
+
+static const char *target_sysroot_hdrs_suffix = 0;
+
+/* Nonzero means write "temp" files in source directory
+   and use the source file's name in them, and don't delete them.  */
+
+static int save_temps_flag;
+
+/* Nonzero means pass multiple source files to the compiler at one time.  */
+
+static int combine_flag = 0;
+
+/* Nonzero means use pipes to communicate between subprocesses.
+   Overridden by either of the above two flags.  */
+
+static int use_pipes;
+
+/* The compiler version.  */
+
+static const char *compiler_version;
+
+/* The target version specified with -V */
+
+static const char *const spec_version = DEFAULT_TARGET_VERSION;
+
+/* The target machine specified with -b.  */
+
+static const char *spec_machine = DEFAULT_TARGET_MACHINE;
+
+/* Nonzero if cross-compiling.
+   When -b is used, the value comes from the `specs' file.  */
+
+#ifdef CROSS_DIRECTORY_STRUCTURE
+static const char *cross_compile = "1";
+#else
+static const char *cross_compile = "0";
+#endif
+
+#ifdef MODIFY_TARGET_NAME
+
+/* Information on how to alter the target name based on a command-line
+   switch.  The only case we support now is simply appending or deleting a
+   string to or from the end of the first part of the configuration name.  */
+
+static const struct modify_target
+{
+  const char *const sw;
+  const enum add_del {ADD, DELETE} add_del;
+  const char *const str;
+}
+modify_target[] = MODIFY_TARGET_NAME;
+#endif
+
+/* The number of errors that have occurred; the link phase will not be
+   run if this is nonzero.  */
+static int error_count = 0;
+
+/* Greatest exit code of sub-processes that has been encountered up to
+   now.  */
+static int greatest_status = 1;
+
+/* This is the obstack which we use to allocate many strings.  */
+
+static struct obstack obstack;
+
+/* This is the obstack to build an environment variable to pass to
+   collect2 that describes all of the relevant switches of what to
+   pass the compiler in building the list of pointers to constructors
+   and destructors.  */
+
+static struct obstack collect_obstack;
+
+/* This is a list of a wrapper program and its arguments.
+   e.g. wrapper_string of "strace,-c"
+   will cause all programs to run as
+       strace -c program arguments
+   instead of just
+       program arguments */
+static const char  *wrapper_string;
+
+/* Forward declaration for prototypes.  */
+struct path_prefix;
+struct prefix_list;
+
+static void init_spec (void);
+static void store_arg (const char *, int, int);
+static void insert_wrapper (const char *);
+static char *load_specs (const char *);
+static void read_specs (const char *, int);
+static void set_spec (const char *, const char *);
+static struct compiler *lookup_compiler (const char *, size_t, const char *);
+static char *build_search_list (const struct path_prefix *, const char *,
+				bool, bool);
+static void xputenv (const char *);
+static void putenv_from_prefixes (const struct path_prefix *, const char *,
+				  bool);
+static int access_check (const char *, int);
+static char *find_a_file (const struct path_prefix *, const char *, int, bool);
+static void add_prefix (struct path_prefix *, const char *, const char *,
+			int, int, int);
+static void add_sysrooted_prefix (struct path_prefix *, const char *,
+				  const char *, int, int, int);
+static void translate_options (int *, const char *const **);
+static char *skip_whitespace (char *);
+static void delete_if_ordinary (const char *);
+static void delete_temp_files (void);
+static void delete_failure_queue (void);
+static void clear_failure_queue (void);
+static int check_live_switch (int, int);
+static const char *handle_braces (const char *);
+static inline bool input_suffix_matches (const char *, const char *);
+static inline bool switch_matches (const char *, const char *, int);
+static inline void mark_matching_switches (const char *, const char *, int);
+static inline void process_marked_switches (void);
+static const char *process_brace_body (const char *, const char *, const char *, int, int);
+static const struct spec_function *lookup_spec_function (const char *);
+static const char *eval_spec_function (const char *, const char *);
+static const char *handle_spec_function (const char *);
+static char *save_string (const char *, int);
+static void set_collect_gcc_options (void);
+static int do_spec_1 (const char *, int, const char *);
+static int do_spec_2 (const char *);
+static void do_option_spec (const char *, const char *);
+static void do_self_spec (const char *);
+static const char *find_file (const char *);
+static int is_directory (const char *, bool);
+static const char *validate_switches (const char *);
+static void validate_all_switches (void);
+static inline void validate_switches_from_spec (const char *);
+static void give_switch (int, int);
+static int used_arg (const char *, int);
+static int default_arg (const char *, int);
+static void set_multilib_dir (void);
+static void print_multilib_info (void);
+static void perror_with_name (const char *);
+static void fatal_ice (const char *, ...) ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
+static void notice (const char *, ...) ATTRIBUTE_PRINTF_1;
+static void display_help (void);
+static void add_preprocessor_option (const char *, int);
+static void add_assembler_option (const char *, int);
+static void add_linker_option (const char *, int);
+static void process_command (int, const char **);
+static int execute (void);
+static void alloc_args (void);
+static void clear_args (void);
+static void fatal_error (int);
+#if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
+static void init_gcc_specs (struct obstack *, const char *, const char *,
+			    const char *);
+#endif
+#if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
+static const char *convert_filename (const char *, int, int);
+#endif
+
+static const char *getenv_spec_function (int, const char **);
+static const char *if_exists_spec_function (int, const char **);
+static const char *if_exists_else_spec_function (int, const char **);
+static const char *replace_outfile_spec_function (int, const char **);
+static const char *version_compare_spec_function (int, const char **);
+static const char *include_spec_function (int, const char **);
+static const char *print_asm_header_spec_function (int, const char **);
+
+/* The Specs Language
+
+Specs are strings containing lines, each of which (if not blank)
+is made up of a program name, and arguments separated by spaces.
+The program name must be exact and start from root, since no path
+is searched and it is unreliable to depend on the current working directory.
+Redirection of input or output is not supported; the subprograms must
+accept filenames saying what files to read and write.
+
+In addition, the specs can contain %-sequences to substitute variable text
+or for conditional text.  Here is a table of all defined %-sequences.
+Note that spaces are not generated automatically around the results of
+expanding these sequences; therefore, you can concatenate them together
+or with constant text in a single argument.
+
+ %%	substitute one % into the program name or argument.
+ %i     substitute the name of the input file being processed.
+ %b     substitute the basename of the input file being processed.
+	This is the substring up to (and not including) the last period
+	and not including the directory.
+ %B	same as %b, but include the file suffix (text after the last period).
+ %gSUFFIX
+	substitute a file name that has suffix SUFFIX and is chosen
+	once per compilation, and mark the argument a la %d.  To reduce
+	exposure to denial-of-service attacks, the file name is now
+	chosen in a way that is hard to predict even when previously
+	chosen file names are known.  For example, `%g.s ... %g.o ... %g.s'
+	might turn into `ccUVUUAU.s ccXYAXZ12.o ccUVUUAU.s'.  SUFFIX matches
+	the regexp "[.0-9A-Za-z]*%O"; "%O" is treated exactly as if it
+	had been pre-processed.  Previously, %g was simply substituted
+	with a file name chosen once per compilation, without regard
+	to any appended suffix (which was therefore treated just like
+	ordinary text), making such attacks more likely to succeed.
+ %|SUFFIX
+	like %g, but if -pipe is in effect, expands simply to "-".
+ %mSUFFIX
+        like %g, but if -pipe is in effect, expands to nothing.  (We have both
+	%| and %m to accommodate differences between system assemblers; see
+	the AS_NEEDS_DASH_FOR_PIPED_INPUT target macro.)
+ %uSUFFIX
+	like %g, but generates a new temporary file name even if %uSUFFIX
+	was already seen.
+ %USUFFIX
+	substitutes the last file name generated with %uSUFFIX, generating a
+	new one if there is no such last file name.  In the absence of any
+	%uSUFFIX, this is just like %gSUFFIX, except they don't share
+	the same suffix "space", so `%g.s ... %U.s ... %g.s ... %U.s'
+	would involve the generation of two distinct file names, one
+	for each `%g.s' and another for each `%U.s'.  Previously, %U was
+	simply substituted with a file name chosen for the previous %u,
+	without regard to any appended suffix.
+ %jSUFFIX
+        substitutes the name of the HOST_BIT_BUCKET, if any, and if it is
+        writable, and if save-temps is off; otherwise, substitute the name
+        of a temporary file, just like %u.  This temporary file is not
+        meant for communication between processes, but rather as a junk
+        disposal mechanism.
+ %.SUFFIX
+        substitutes .SUFFIX for the suffixes of a matched switch's args when
+        it is subsequently output with %*. SUFFIX is terminated by the next
+        space or %.
+ %d	marks the argument containing or following the %d as a
+	temporary file name, so that that file will be deleted if CC exits
+	successfully.  Unlike %g, this contributes no text to the argument.
+ %w	marks the argument containing or following the %w as the
+	"output file" of this compilation.  This puts the argument
+	into the sequence of arguments that %o will substitute later.
+ %V	indicates that this compilation produces no "output file".
+ %W{...}
+	like %{...} but mark last argument supplied within
+	as a file to be deleted on failure.
+ %o	substitutes the names of all the output files, with spaces
+	automatically placed around them.  You should write spaces
+	around the %o as well or the results are undefined.
+	%o is for use in the specs for running the linker.
+	Input files whose names have no recognized suffix are not compiled
+	at all, but they are included among the output files, so they will
+	be linked.
+ %O	substitutes the suffix for object files.  Note that this is
+        handled specially when it immediately follows %g, %u, or %U
+	(with or without a suffix argument) because of the need for
+	those to form complete file names.  The handling is such that
+	%O is treated exactly as if it had already been substituted,
+	except that %g, %u, and %U do not currently support additional
+	SUFFIX characters following %O as they would following, for
+	example, `.o'.
+ %I	Substitute any of -iprefix (made from GCC_EXEC_PREFIX), -isysroot
+	(made from TARGET_SYSTEM_ROOT), -isystem (made from COMPILER_PATH
+	and -B options) and -imultilib as necessary.
+ %s     current argument is the name of a library or startup file of some sort.
+        Search for that file in a standard list of directories
+	and substitute the full name found.
+ %eSTR  Print STR as an error message.  STR is terminated by a newline.
+        Use this when inconsistent options are detected.
+ %nSTR  Print STR as a notice.  STR is terminated by a newline.
+ %x{OPTION}	Accumulate an option for %X.
+ %X	Output the accumulated linker options specified by compilations.
+ %Y	Output the accumulated assembler options specified by compilations.
+ %Z	Output the accumulated preprocessor options specified by compilations.
+ %a     process ASM_SPEC as a spec.
+        This allows config.h to specify part of the spec for running as.
+ %A	process ASM_FINAL_SPEC as a spec.  A capital A is actually
+	used here.  This can be used to run a post-processor after the
+	assembler has done its job.
+ %D	Dump out a -L option for each directory in startfile_prefixes.
+	If multilib_dir is set, extra entries are generated with it affixed.
+ %l     process LINK_SPEC as a spec.
+ %L     process LIB_SPEC as a spec.
+ %G     process LIBGCC_SPEC as a spec.
+ %R     Output the concatenation of target_system_root and
+        target_sysroot_suffix.
+ %S     process STARTFILE_SPEC as a spec.  A capital S is actually used here.
+ %E     process ENDFILE_SPEC as a spec.  A capital E is actually used here.
+ %C     process CPP_SPEC as a spec.
+ %1	process CC1_SPEC as a spec.
+ %2	process CC1PLUS_SPEC as a spec.
+ %*	substitute the variable part of a matched option.  (See below.)
+	Note that each comma in the substituted string is replaced by
+	a single space.
+ %<S    remove all occurrences of -S from the command line.
+        Note - this command is position dependent.  % commands in the
+        spec string before this one will see -S, % commands in the
+        spec string after this one will not.
+ %<S*	remove all occurrences of all switches beginning with -S from the
+        command line.
+ %:function(args)
+	Call the named function FUNCTION, passing it ARGS.  ARGS is
+	first processed as a nested spec string, then split into an
+	argument vector in the usual fashion.  The function returns
+	a string which is processed as if it had appeared literally
+	as part of the current spec.
+ %{S}   substitutes the -S switch, if that switch was given to CC.
+	If that switch was not specified, this substitutes nothing.
+	Here S is a metasyntactic variable.
+ %{S*}  substitutes all the switches specified to CC whose names start
+	with -S.  This is used for -o, -I, etc; switches that take
+	arguments.  CC considers `-o foo' as being one switch whose
+	name starts with `o'.  %{o*} would substitute this text,
+	including the space; thus, two arguments would be generated.
+ %{S*&T*} likewise, but preserve order of S and T options (the order
+	of S and T in the spec is not significant).  Can be any number
+	of ampersand-separated variables; for each the wild card is
+	optional.  Useful for CPP as %{D*&U*&A*}.
+
+ %{S:X}   substitutes X, if the -S switch was given to CC.
+ %{!S:X}  substitutes X, if the -S switch was NOT given to CC.
+ %{S*:X}  substitutes X if one or more switches whose names start
+          with -S was given to CC.  Normally X is substituted only
+          once, no matter how many such switches appeared.  However,
+          if %* appears somewhere in X, then X will be substituted
+          once for each matching switch, with the %* replaced by the
+          part of that switch that matched the '*'.
+ %{.S:X}  substitutes X, if processing a file with suffix S.
+ %{!.S:X} substitutes X, if NOT processing a file with suffix S.
+ %{,S:X}  substitutes X, if processing a file which will use spec S.
+ %{!,S:X} substitutes X, if NOT processing a file which will use spec S.
+	  
+ %{S|T:X} substitutes X if either -S or -T was given to CC.  This may be
+	  combined with '!', '.', ',', and '*' as above binding stronger
+	  than the OR.
+	  If %* appears in X, all of the alternatives must be starred, and
+	  only the first matching alternative is substituted.
+ %{S:X;   if S was given to CC, substitutes X;
+   T:Y;   else if T was given to CC, substitutes Y;
+    :D}   else substitutes D.  There can be as many clauses as you need.
+          This may be combined with '.', '!', ',', '|', and '*' as above.
+
+ %(Spec) processes a specification defined in a specs file as *Spec:
+ %[Spec] as above, but put __ around -D arguments
+
+The conditional text X in a %{S:X} or similar construct may contain
+other nested % constructs or spaces, or even newlines.  They are
+processed as usual, as described above.  Trailing white space in X is
+ignored.  White space may also appear anywhere on the left side of the
+colon in these constructs, except between . or * and the corresponding
+word.
+
+The -O, -f, -m, and -W switches are handled specifically in these
+constructs.  If another value of -O or the negated form of a -f, -m, or
+-W switch is found later in the command line, the earlier switch
+value is ignored, except with {S*} where S is just one letter; this
+passes all matching options.
+
+The character | at the beginning of the predicate text is used to indicate
+that a command should be piped to the following command, but only if -pipe
+is specified.
+
+Note that it is built into CC which switches take arguments and which
+do not.  You might think it would be useful to generalize this to
+allow each compiler's spec to say which switches take arguments.  But
+this cannot be done in a consistent fashion.  CC cannot even decide
+which input files have been specified without knowing which switches
+take arguments, and it must know which input files to compile in order
+to tell which compilers to run.
+
+CC also knows implicitly that arguments starting in `-l' are to be
+treated as compiler output files, and passed to the linker in their
+proper position among the other output files.  */
+
+/* Define the macros used for specs %a, %l, %L, %S, %C, %1.  */
+
+/* config.h can define ASM_SPEC to provide extra args to the assembler
+   or extra switch-translations.  */
+#ifndef ASM_SPEC
+#define ASM_SPEC ""
+#endif
+
+/* config.h can define ASM_FINAL_SPEC to run a post processor after
+   the assembler has run.  */
+#ifndef ASM_FINAL_SPEC
+#define ASM_FINAL_SPEC ""
+#endif
+
+/* config.h can define CPP_SPEC to provide extra args to the C preprocessor
+   or extra switch-translations.  */
+#ifndef CPP_SPEC
+#define CPP_SPEC ""
+#endif
+
+/* config.h can define CC1_SPEC to provide extra args to cc1 and cc1plus
+   or extra switch-translations.  */
+#ifndef CC1_SPEC
+#define CC1_SPEC ""
+#endif
+
+/* config.h can define CC1PLUS_SPEC to provide extra args to cc1plus
+   or extra switch-translations.  */
+#ifndef CC1PLUS_SPEC
+#define CC1PLUS_SPEC ""
+#endif
+
+/* config.h can define LINK_SPEC to provide extra args to the linker
+   or extra switch-translations.  */
+#ifndef LINK_SPEC
+#define LINK_SPEC ""
+#endif
+
+/* config.h can define LIB_SPEC to override the default libraries.  */
+#ifndef LIB_SPEC
+#define LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}"
+#endif
+
+/* mudflap specs */
+#ifndef MFWRAP_SPEC
+/* XXX: valid only for GNU ld */
+/* XXX: should exactly match hooks provided by libmudflap.a */
+#define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \
+ --wrap=malloc --wrap=free --wrap=calloc --wrap=realloc\
+ --wrap=mmap --wrap=munmap --wrap=alloca\
+} %{fmudflapth: --wrap=pthread_create\
+}} %{fmudflap|fmudflapth: --wrap=main}"
+#endif
+#ifndef MFLIB_SPEC
+#define MFLIB_SPEC "%{fmudflap|fmudflapth: -export-dynamic}"
+#endif
+
+/* config.h can define LIBGCC_SPEC to override how and when libgcc.a is
+   included.  */
+#ifndef LIBGCC_SPEC
+#if defined(REAL_LIBGCC_SPEC)
+#define LIBGCC_SPEC REAL_LIBGCC_SPEC
+#elif defined(LINK_LIBGCC_SPECIAL_1)
+/* Have gcc do the search for libgcc.a.  */
+#define LIBGCC_SPEC "libgcc.a%s"
+#else
+#define LIBGCC_SPEC "-lgcc"
+#endif
+#endif
+
+/* config.h can define STARTFILE_SPEC to override the default crt0 files.  */
+#ifndef STARTFILE_SPEC
+#define STARTFILE_SPEC  \
+  "%{!shared:%{pg:gcrt0%O%s}%{!pg:%{p:mcrt0%O%s}%{!p:crt0%O%s}}}"
+#endif
+
+/* config.h can define SWITCHES_NEED_SPACES to control which options
+   require spaces between the option and the argument.  */
+#ifndef SWITCHES_NEED_SPACES
+#define SWITCHES_NEED_SPACES ""
+#endif
+
+/* config.h can define ENDFILE_SPEC to override the default crtn files.  */
+#ifndef ENDFILE_SPEC
+#define ENDFILE_SPEC ""
+#endif
+
+#ifndef LINKER_NAME
+#define LINKER_NAME "collect2"
+#endif
+
+#ifdef HAVE_AS_DEBUG_PREFIX_MAP
+#define ASM_MAP " %{fdebug-prefix-map=*:--debug-prefix-map %*}"
+#else
+#define ASM_MAP ""
+#endif
+
+/* Define ASM_DEBUG_SPEC to be a spec suitable for translating '-g'
+   to the assembler.  */
+#ifndef ASM_DEBUG_SPEC
+# if defined(DBX_DEBUGGING_INFO) && defined(DWARF2_DEBUGGING_INFO) \
+     && defined(HAVE_AS_GDWARF2_DEBUG_FLAG) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
+#  define ASM_DEBUG_SPEC						\
+      (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG				\
+       ? "%{!g0:%{gdwarf-2*:--gdwarf2}%{!gdwarf-2*:%{g*:--gstabs}}}" ASM_MAP	\
+       : "%{!g0:%{gstabs*:--gstabs}%{!gstabs*:%{g*:--gdwarf2}}}" ASM_MAP)
+# else
+#  if defined(DBX_DEBUGGING_INFO) && defined(HAVE_AS_GSTABS_DEBUG_FLAG)
+#   define ASM_DEBUG_SPEC "%{g*:%{!g0:--gstabs}}" ASM_MAP
+#  endif
+#  if defined(DWARF2_DEBUGGING_INFO) && defined(HAVE_AS_GDWARF2_DEBUG_FLAG)
+#   define ASM_DEBUG_SPEC "%{g*:%{!g0:--gdwarf2}}" ASM_MAP
+#  endif
+# endif
+#endif
+#ifndef ASM_DEBUG_SPEC
+# define ASM_DEBUG_SPEC ""
+#endif
+
+/* Here is the spec for running the linker, after compiling all files.  */
+
+/* This is overridable by the target in case they need to specify the
+   -lgcc and -lc order specially, yet not require them to override all
+   of LINK_COMMAND_SPEC.  */
+#ifndef LINK_GCC_C_SEQUENCE_SPEC
+#define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G"
+#endif
+
+#ifndef LINK_SSP_SPEC
+#ifdef TARGET_LIBC_PROVIDES_SSP
+#define LINK_SSP_SPEC "%{fstack-protector:}"
+#else
+#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all:-lssp_nonshared -lssp}"
+#endif
+#endif
+
+#ifndef LINK_PIE_SPEC
+#ifdef HAVE_LD_PIE
+#define LINK_PIE_SPEC "%{pie:-pie} "
+#else
+#define LINK_PIE_SPEC "%{pie:} "
+#endif
+#endif
+
+/* -u* was put back because both BSD and SysV seem to support it.  */
+/* %{static:} simply prevents an error message if the target machine
+   doesn't handle -static.  */
+/* We want %{T*} after %{L*} and %D so that it can be used to specify linker
+   scripts which exist in user specified directories, or in standard
+   directories.  */
+#ifndef LINK_COMMAND_SPEC
+#define LINK_COMMAND_SPEC "\
+%{!fsyntax-only:%{!c:%{!M:%{!MM:%{!E:%{!S:\
+    %(linker) %l " LINK_PIE_SPEC "%X %{o*} %{A} %{d} %{e*} %{m} %{N} %{n} %{r}\
+    %{s} %{t} %{u*} %{x} %{z} %{Z} %{!A:%{!nostdlib:%{!nostartfiles:%S}}}\
+    %{static:} %{L*} %(mfwrap) %(link_libgcc) %o\
+    %{fopenmp|ftree-parallelize-loops=*:%:include(libgomp.spec)%(link_gomp)} %(mflib)\
+    %{fprofile-arcs|fprofile-generate|coverage:-lgcov}\
+    %{!nostdlib:%{!nodefaultlibs:%(link_ssp) %(link_gcc_c_sequence)}}\
+    %{!A:%{!nostdlib:%{!nostartfiles:%E}}} %{T*} }}}}}}"
+#endif
+
+#ifndef LINK_LIBGCC_SPEC
+/* Generate -L options for startfile prefix list.  */
+# define LINK_LIBGCC_SPEC "%D"
+#endif
+
+#ifndef STARTFILE_PREFIX_SPEC
+# define STARTFILE_PREFIX_SPEC ""
+#endif
+
+#ifndef SYSROOT_SPEC
+# define SYSROOT_SPEC "--sysroot=%R"
+#endif
+
+#ifndef SYSROOT_SUFFIX_SPEC
+# define SYSROOT_SUFFIX_SPEC ""
+#endif
+
+#ifndef SYSROOT_HEADERS_SUFFIX_SPEC
+# define SYSROOT_HEADERS_SUFFIX_SPEC ""
+#endif
+
+static const char *asm_debug;
+static const char *cpp_spec = CPP_SPEC;
+static const char *cc1_spec = CC1_SPEC;
+static const char *cc1plus_spec = CC1PLUS_SPEC;
+static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC;
+static const char *link_ssp_spec = LINK_SSP_SPEC;
+static const char *asm_spec = ASM_SPEC;
+static const char *asm_final_spec = ASM_FINAL_SPEC;
+static const char *link_spec = LINK_SPEC;
+static const char *lib_spec = LIB_SPEC;
+static const char *mfwrap_spec = MFWRAP_SPEC;
+static const char *mflib_spec = MFLIB_SPEC;
+static const char *link_gomp_spec = "";
+static const char *libgcc_spec = LIBGCC_SPEC;
+static const char *endfile_spec = ENDFILE_SPEC;
+static const char *startfile_spec = STARTFILE_SPEC;
+static const char *switches_need_spaces = SWITCHES_NEED_SPACES;
+static const char *linker_name_spec = LINKER_NAME;
+static const char *link_command_spec = LINK_COMMAND_SPEC;
+static const char *link_libgcc_spec = LINK_LIBGCC_SPEC;
+static const char *startfile_prefix_spec = STARTFILE_PREFIX_SPEC;
+static const char *sysroot_spec = SYSROOT_SPEC;
+static const char *sysroot_suffix_spec = SYSROOT_SUFFIX_SPEC;
+static const char *sysroot_hdrs_suffix_spec = SYSROOT_HEADERS_SUFFIX_SPEC;
+
+/* Standard options to cpp, cc1, and as, to reduce duplication in specs.
+   There should be no need to override these in target dependent files,
+   but we need to copy them to the specs file so that newer versions
+   of the GCC driver can correctly drive older tool chains with the
+   appropriate -B options.  */
+
+/* When cpplib handles traditional preprocessing, get rid of this, and
+   call cc1 (or cc1obj in objc/lang-specs.h) from the main specs so
+   that we default the front end language better.  */
+static const char *trad_capable_cpp =
+"cc1 -E %{traditional|ftraditional|traditional-cpp:-traditional-cpp}";
+
+/* We don't wrap .d files in %W{} since a missing .d file, and
+   therefore no dependency entry, confuses make into thinking a .o
+   file that happens to exist is up-to-date.  */
+static const char *cpp_unique_options =
+"%{C|CC:%{!E:%eGCC does not support -C or -CC without -E}}\
+ %{!Q:-quiet} %{nostdinc*} %{C} %{CC} %{v} %{I*&F*} %{P} %I\
+ %{MD:-MD %{!o:%b.d}%{o*:%.d%*}}\
+ %{MMD:-MMD %{!o:%b.d}%{o*:%.d%*}}\
+ %{M} %{MM} %{MF*} %{MG} %{MP} %{MQ*} %{MT*}\
+ %{!E:%{!M:%{!MM:%{!MT:%{!MQ:%{MD|MMD:%{o*:-MQ %*}}}}}}}\
+ %{remap} %{g3|ggdb3|gstabs3|gcoff3|gxcoff3|gvms3:-dD}\
+ %{H} %C %{D*&U*&A*} %{i*} %Z %i\
+ %{fmudflap:-D_MUDFLAP -include mf-runtime.h}\
+ %{fmudflapth:-D_MUDFLAP -D_MUDFLAPTH -include mf-runtime.h}\
+ %{E|M|MM:%W{o*}}";
+
+/* This contains cpp options which are common with cc1_options and are passed
+   only when preprocessing only to avoid duplication.  We pass the cc1 spec
+   options to the preprocessor so that it the cc1 spec may manipulate
+   options used to set target flags.  Those special target flags settings may
+   in turn cause preprocessor symbols to be defined specially.  */
+static const char *cpp_options =
+"%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\
+ %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\
+ %{undef} %{save-temps:-fpch-preprocess}";
+
+/* This contains cpp options which are not passed when the preprocessor
+   output will be used by another program.  */
+static const char *cpp_debug_options = "%{d*}";
+
+/* NB: This is shared amongst all front-ends, except for Ada.  */
+static const char *cc1_options =
+"%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
+ %1 %{!Q:-quiet} -dumpbase %B %{d*} %{m*} %{a*}\
+ %{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}%{!c:%{!S:-auxbase %b}}\
+ %{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\
+ %{v:-version} %{pg:-p} %{p} %{f*} %{undef}\
+ %{Qn:-fno-ident} %{--help:--help}\
+ %{--target-help:--target-help}\
+ %{--help=*:--help=%(VALUE)}\
+ %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\
+ %{fsyntax-only:-o %j} %{-param*}\
+ %{fmudflap|fmudflapth:-fno-builtin -fno-merge-constants}\
+ %{coverage:-fprofile-arcs -ftest-coverage}";
+
+static const char *asm_options =
+"%{--target-help:%:print-asm-header()} "
+#if HAVE_GNU_AS
+/* If GNU AS is used, then convert -w (no warnings), -I, and -v
+   to the assembler equivalents.  */
+"%{v} %{w:-W} %{I*} "
+#endif
+"%a %Y %{c:%W{o*}%{!o*:-o %w%b%O}}%{!c:-o %d%w%u%O}";
+
+static const char *invoke_as =
+#ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT
+"%{!S:-o %|.s |\n as %(asm_options) %|.s %A }";
+#else
+"%{!S:-o %|.s |\n as %(asm_options) %m.s %A }";
+#endif
+
+/* Some compilers have limits on line lengths, and the multilib_select
+   and/or multilib_matches strings can be very long, so we build them at
+   run time.  */
+static struct obstack multilib_obstack;
+static const char *multilib_select;
+static const char *multilib_matches;
+static const char *multilib_defaults;
+static const char *multilib_exclusions;
+
+/* Check whether a particular argument is a default argument.  */
+
+#ifndef MULTILIB_DEFAULTS
+#define MULTILIB_DEFAULTS { "" }
+#endif
+
+static const char *const multilib_defaults_raw[] = MULTILIB_DEFAULTS;
+
+#ifndef DRIVER_SELF_SPECS
+#define DRIVER_SELF_SPECS ""
+#endif
+
+/* Adding -fopenmp should imply pthreads.  This is particularly important
+   for targets that use different start files and suchlike.  */
+#ifndef GOMP_SELF_SPECS
+#define GOMP_SELF_SPECS "%{fopenmp|ftree-parallelize-loops=*: -pthread}"
+#endif
+
+static const char *const driver_self_specs[] = {
+  DRIVER_SELF_SPECS, GOMP_SELF_SPECS
+};
+
+#ifndef OPTION_DEFAULT_SPECS
+#define OPTION_DEFAULT_SPECS { "", "" }
+#endif
+
+struct default_spec
+{
+  const char *name;
+  const char *spec;
+};
+
+static const struct default_spec
+  option_default_specs[] = { OPTION_DEFAULT_SPECS };
+
+struct user_specs
+{
+  struct user_specs *next;
+  const char *filename;
+};
+
+static struct user_specs *user_specs_head, *user_specs_tail;
+
+#ifndef SWITCH_TAKES_ARG
+#define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
+#endif
+
+#ifndef WORD_SWITCH_TAKES_ARG
+#define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
+#endif
+
+#ifdef HAVE_TARGET_EXECUTABLE_SUFFIX
+/* This defines which switches stop a full compilation.  */
+#define DEFAULT_SWITCH_CURTAILS_COMPILATION(CHAR) \
+  ((CHAR) == 'c' || (CHAR) == 'S')
+
+#ifndef SWITCH_CURTAILS_COMPILATION
+#define SWITCH_CURTAILS_COMPILATION(CHAR) \
+  DEFAULT_SWITCH_CURTAILS_COMPILATION(CHAR)
+#endif
+#endif
+
+/* Record the mapping from file suffixes for compilation specs.  */
+
+struct compiler
+{
+  const char *suffix;		/* Use this compiler for input files
+				   whose names end in this suffix.  */
+
+  const char *spec;		/* To use this compiler, run this spec.  */
+
+  const char *cpp_spec;         /* If non-NULL, substitute this spec
+				   for `%C', rather than the usual
+				   cpp_spec.  */
+  const int combinable;          /* If nonzero, compiler can deal with
+				    multiple source files at once (IMA).  */
+  const int needs_preprocessing; /* If nonzero, source files need to
+				    be run through a preprocessor.  */
+};
+
+/* Pointer to a vector of `struct compiler' that gives the spec for
+   compiling a file, based on its suffix.
+   A file that does not end in any of these suffixes will be passed
+   unchanged to the loader and nothing else will be done to it.
+
+   An entry containing two 0s is used to terminate the vector.
+
+   If multiple entries match a file, the last matching one is used.  */
+
+static struct compiler *compilers;
+
+/* Number of entries in `compilers', not counting the null terminator.  */
+
+static int n_compilers;
+
+/* The default list of file name suffixes and their compilation specs.  */
+
+static const struct compiler default_compilers[] =
+{
+  /* Add lists of suffixes of known languages here.  If those languages
+     were not present when we built the driver, we will hit these copies
+     and be given a more meaningful error than "file not used since
+     linking is not done".  */
+  {".m",  "#Objective-C", 0, 0, 0}, {".mi",  "#Objective-C", 0, 0, 0},
+  {".mm", "#Objective-C++", 0, 0, 0}, {".M", "#Objective-C++", 0, 0, 0},
+  {".mii", "#Objective-C++", 0, 0, 0},
+  {".cc", "#C++", 0, 0, 0}, {".cxx", "#C++", 0, 0, 0},
+  {".cpp", "#C++", 0, 0, 0}, {".cp", "#C++", 0, 0, 0},
+  {".c++", "#C++", 0, 0, 0}, {".C", "#C++", 0, 0, 0},
+  {".CPP", "#C++", 0, 0, 0}, {".ii", "#C++", 0, 0, 0},
+  {".ads", "#Ada", 0, 0, 0}, {".adb", "#Ada", 0, 0, 0},
+  {".f", "#Fortran", 0, 0, 0}, {".F", "#Fortran", 0, 0, 0},
+  {".for", "#Fortran", 0, 0, 0}, {".FOR", "#Fortran", 0, 0, 0},
+  {".ftn", "#Fortran", 0, 0, 0}, {".FTN", "#Fortran", 0, 0, 0},
+  {".fpp", "#Fortran", 0, 0, 0}, {".FPP", "#Fortran", 0, 0, 0},
+  {".f90", "#Fortran", 0, 0, 0}, {".F90", "#Fortran", 0, 0, 0},
+  {".f95", "#Fortran", 0, 0, 0}, {".F95", "#Fortran", 0, 0, 0},
+  {".f03", "#Fortran", 0, 0, 0}, {".F03", "#Fortran", 0, 0, 0},
+  {".f08", "#Fortran", 0, 0, 0}, {".F08", "#Fortran", 0, 0, 0},
+  {".r", "#Ratfor", 0, 0, 0},
+  {".p", "#Pascal", 0, 0, 0}, {".pas", "#Pascal", 0, 0, 0},
+  {".java", "#Java", 0, 0, 0}, {".class", "#Java", 0, 0, 0},
+  {".zip", "#Java", 0, 0, 0}, {".jar", "#Java", 0, 0, 0},
+  /* Next come the entries for C.  */
+  {".c", "@c", 0, 1, 1},
+  {"@c",
+   /* cc1 has an integrated ISO C preprocessor.  We should invoke the
+      external preprocessor if -save-temps is given.  */
+     "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\
+      %{!E:%{!M:%{!MM:\
+          %{traditional|ftraditional:\
+%eGNU C no longer supports -traditional without -E}\
+       %{!combine:\
+	  %{save-temps|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
+		%(cpp_options) -o %{save-temps:%b.i} %{!save-temps:%g.i} \n\
+		    cc1 -fpreprocessed %{save-temps:%b.i} %{!save-temps:%g.i} \
+			%(cc1_options)}\
+	  %{!save-temps:%{!traditional-cpp:%{!no-integrated-cpp:\
+		cc1 %(cpp_unique_options) %(cc1_options)}}}\
+          %{!fsyntax-only:%(invoke_as)}} \
+      %{combine:\
+	  %{save-temps|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
+		%(cpp_options) -o %{save-temps:%b.i} %{!save-temps:%g.i}}\
+	  %{!save-temps:%{!traditional-cpp:%{!no-integrated-cpp:\
+		cc1 %(cpp_unique_options) %(cc1_options)}}\
+                %{!fsyntax-only:%(invoke_as)}}}}}}", 0, 1, 1},
+  {"-",
+   "%{!E:%e-E or -x required when input is from standard input}\
+    %(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)", 0, 0, 0},
+  {".h", "@c-header", 0, 0, 0},
+  {"@c-header",
+   /* cc1 has an integrated ISO C preprocessor.  We should invoke the
+      external preprocessor if -save-temps is given.  */
+     "%{E|M|MM:%(trad_capable_cpp) %(cpp_options) %(cpp_debug_options)}\
+      %{!E:%{!M:%{!MM:\
+	  %{save-temps|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
+		%(cpp_options) -o %{save-temps:%b.i} %{!save-temps:%g.i} \n\
+		    cc1 -fpreprocessed %{save-temps:%b.i} %{!save-temps:%g.i} \
+			%(cc1_options)\
+                        -o %g.s %{!o*:--output-pch=%i.gch}\
+                        %W{o*:--output-pch=%*}%V}\
+	  %{!save-temps:%{!traditional-cpp:%{!no-integrated-cpp:\
+		cc1 %(cpp_unique_options) %(cc1_options)\
+                    -o %g.s %{!o*:--output-pch=%i.gch}\
+                    %W{o*:--output-pch=%*}%V}}}}}}", 0, 0, 0},
+  {".i", "@cpp-output", 0, 1, 0},
+  {"@cpp-output",
+   "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 1, 0},
+  {".s", "@assembler", 0, 1, 0},
+  {"@assembler",
+   "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 1, 0},
+  {".sx", "@assembler-with-cpp", 0, 1, 0},
+  {".S", "@assembler-with-cpp", 0, 1, 0},
+  {"@assembler-with-cpp",
+#ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT
+   "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\
+      %{E|M|MM:%(cpp_debug_options)}\
+      %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\
+       as %(asm_debug) %(asm_options) %|.s %A }}}}"
+#else
+   "%(trad_capable_cpp) -lang-asm %(cpp_options) -fno-directives-only\
+      %{E|M|MM:%(cpp_debug_options)}\
+      %{!M:%{!MM:%{!E:%{!S:-o %|.s |\n\
+       as %(asm_debug) %(asm_options) %m.s %A }}}}"
+#endif
+   , 0, 1, 0},
+
+#include "specs.h"
+  /* Mark end of table.  */
+  {0, 0, 0, 0, 0}
+};
+
+/* Number of elements in default_compilers, not counting the terminator.  */
+
+static const int n_default_compilers = ARRAY_SIZE (default_compilers) - 1;
+
+/* A vector of options to give to the linker.
+   These options are accumulated by %x,
+   and substituted into the linker command with %X.  */
+static int n_linker_options;
+static char **linker_options;
+
+/* A vector of options to give to the assembler.
+   These options are accumulated by -Wa,
+   and substituted into the assembler command with %Y.  */
+static int n_assembler_options;
+static char **assembler_options;
+
+/* A vector of options to give to the preprocessor.
+   These options are accumulated by -Wp,
+   and substituted into the preprocessor command with %Z.  */
+static int n_preprocessor_options;
+static char **preprocessor_options;
+
+/* Define how to map long options into short ones.  */
+
+/* This structure describes one mapping.  */
+struct option_map
+{
+  /* The long option's name.  */
+  const char *const name;
+  /* The equivalent short option.  */
+  const char *const equivalent;
+  /* Argument info.  A string of flag chars; NULL equals no options.
+     a => argument required.
+     o => argument optional.
+     j => join argument to equivalent, making one word.
+     * => require other text after NAME as an argument.  */
+  const char *const arg_info;
+};
+
+/* This is the table of mappings.  Mappings are tried sequentially
+   for each option encountered; the first one that matches, wins.  */
+
+static const struct option_map option_map[] =
+ {
+   {"--all-warnings", "-Wall", 0},
+   {"--ansi", "-ansi", 0},
+   {"--assemble", "-S", 0},
+   {"--assert", "-A", "a"},
+   {"--classpath", "-fclasspath=", "aj"},
+   {"--bootclasspath", "-fbootclasspath=", "aj"},
+   {"--CLASSPATH", "-fclasspath=", "aj"},
+   {"--combine", "-combine", 0},
+   {"--comments", "-C", 0},
+   {"--comments-in-macros", "-CC", 0},
+   {"--compile", "-c", 0},
+   {"--debug", "-g", "oj"},
+   {"--define-macro", "-D", "aj"},
+   {"--dependencies", "-M", 0},
+   {"--dump", "-d", "a"},
+   {"--dumpbase", "-dumpbase", "a"},
+   {"--encoding", "-fencoding=", "aj"},
+   {"--entry", "-e", 0},
+   {"--extra-warnings", "-W", 0},
+   {"--extdirs", "-fextdirs=", "aj"},
+   {"--for-assembler", "-Wa", "a"},
+   {"--for-linker", "-Xlinker", "a"},
+   {"--force-link", "-u", "a"},
+   {"--coverage", "-coverage", 0},
+   {"--imacros", "-imacros", "a"},
+   {"--include", "-include", "a"},
+   {"--include-barrier", "-I-", 0},
+   {"--include-directory", "-I", "aj"},
+   {"--include-directory-after", "-idirafter", "a"},
+   {"--include-prefix", "-iprefix", "a"},
+   {"--include-with-prefix", "-iwithprefix", "a"},
+   {"--include-with-prefix-before", "-iwithprefixbefore", "a"},
+   {"--include-with-prefix-after", "-iwithprefix", "a"},
+   {"--language", "-x", "a"},
+   {"--library-directory", "-L", "a"},
+   {"--machine", "-m", "aj"},
+   {"--machine-", "-m", "*j"},
+   {"--no-integrated-cpp", "-no-integrated-cpp", 0},
+   {"--no-line-commands", "-P", 0},
+   {"--no-precompiled-includes", "-noprecomp", 0},
+   {"--no-standard-includes", "-nostdinc", 0},
+   {"--no-standard-libraries", "-nostdlib", 0},
+   {"--no-warnings", "-w", 0},
+   {"--optimize", "-O", "oj"},
+   {"--output", "-o", "a"},
+   {"--output-class-directory", "-foutput-class-dir=", "ja"},
+   {"--param", "--param", "a"},
+   {"--pass-exit-codes", "-pass-exit-codes", 0},
+   {"--pedantic", "-pedantic", 0},
+   {"--pedantic-errors", "-pedantic-errors", 0},
+   {"--pie", "-pie", 0},
+   {"--pipe", "-pipe", 0},
+   {"--prefix", "-B", "a"},
+   {"--preprocess", "-E", 0},
+   {"--print-search-dirs", "-print-search-dirs", 0},
+   {"--print-file-name", "-print-file-name=", "aj"},
+   {"--print-libgcc-file-name", "-print-libgcc-file-name", 0},
+   {"--print-missing-file-dependencies", "-MG", 0},
+   {"--print-multi-lib", "-print-multi-lib", 0},
+   {"--print-multi-directory", "-print-multi-directory", 0},
+   {"--print-multi-os-directory", "-print-multi-os-directory", 0},
+   {"--print-prog-name", "-print-prog-name=", "aj"},
+   {"--print-sysroot", "-print-sysroot", 0},
+   {"--print-sysroot-headers-suffix", "-print-sysroot-headers-suffix", 0},
+   {"--profile", "-p", 0},
+   {"--profile-blocks", "-a", 0},
+   {"--quiet", "-q", 0},
+   {"--resource", "-fcompile-resource=", "aj"},
+   {"--save-temps", "-save-temps", 0},
+   {"--shared", "-shared", 0},
+   {"--silent", "-q", 0},
+   {"--specs", "-specs=", "aj"},
+   {"--static", "-static", 0},
+   {"--std", "-std=", "aj"},
+   {"--symbolic", "-symbolic", 0},
+   {"--sysroot", "--sysroot=", "aj"},
+   {"--time", "-time", 0},
+   {"--trace-includes", "-H", 0},
+   {"--traditional", "-traditional", 0},
+   {"--traditional-cpp", "-traditional-cpp", 0},
+   {"--trigraphs", "-trigraphs", 0},
+   {"--undefine-macro", "-U", "aj"},
+   {"--user-dependencies", "-MM", 0},
+   {"--verbose", "-v", 0},
+   {"--warn-", "-W", "*j"},
+   {"--write-dependencies", "-MD", 0},
+   {"--write-user-dependencies", "-MMD", 0},
+   {"--", "-f", "*j"}
+ };
+
+
+#ifdef TARGET_OPTION_TRANSLATE_TABLE
+static const struct {
+  const char *const option_found;
+  const char *const replacements;
+} target_option_translations[] =
+{
+  TARGET_OPTION_TRANSLATE_TABLE,
+  { 0, 0 }
+};
+#endif
+
+/* Translate the options described by *ARGCP and *ARGVP.
+   Make a new vector and store it back in *ARGVP,
+   and store its length in *ARGCP.  */
+
+static void
+translate_options (int *argcp, const char *const **argvp)
+{
+  int i;
+  int argc = *argcp;
+  const char *const *argv = *argvp;
+  int newvsize = (argc + 2) * 2 * sizeof (const char *);
+  const char **newv = XNEWVAR (const char *, newvsize);
+  int newindex = 0;
+
+  i = 0;
+  newv[newindex++] = argv[i++];
+
+  while (i < argc)
+    {
+#ifdef TARGET_OPTION_TRANSLATE_TABLE
+      int tott_idx;
+
+      for (tott_idx = 0;
+	   target_option_translations[tott_idx].option_found;
+	   tott_idx++)
+	{
+	  if (strcmp (target_option_translations[tott_idx].option_found,
+		      argv[i]) == 0)
+	    {
+	      int spaces = 1;
+	      const char *sp;
+	      char *np;
+
+	      for (sp = target_option_translations[tott_idx].replacements;
+		   *sp; sp++)
+		{
+		  if (*sp == ' ')
+		    spaces ++;
+		}
+
+	      newvsize += spaces * sizeof (const char *);
+	      newv =  XRESIZEVAR (const char *, newv, newvsize);
+
+	      sp = target_option_translations[tott_idx].replacements;
+	      np = xstrdup (sp);
+
+	      while (1)
+		{
+		  while (*np == ' ')
+		    np++;
+		  if (*np == 0)
+		    break;
+		  newv[newindex++] = np;
+		  while (*np != ' ' && *np)
+		    np++;
+		  if (*np == 0)
+		    break;
+		  *np++ = 0;
+		}
+
+	      i ++;
+	      break;
+	    }
+	}
+      if (target_option_translations[tott_idx].option_found)
+	continue;
+#endif
+
+      /* Translate -- options.  */
+      if (argv[i][0] == '-' && argv[i][1] == '-')
+	{
+	  size_t j;
+	  /* Find a mapping that applies to this option.  */
+	  for (j = 0; j < ARRAY_SIZE (option_map); j++)
+	    {
+	      size_t optlen = strlen (option_map[j].name);
+	      size_t arglen = strlen (argv[i]);
+	      size_t complen = arglen > optlen ? optlen : arglen;
+	      const char *arginfo = option_map[j].arg_info;
+
+	      if (arginfo == 0)
+		arginfo = "";
+
+	      if (!strncmp (argv[i], option_map[j].name, complen))
+		{
+		  const char *arg = 0;
+
+		  if (arglen < optlen)
+		    {
+		      size_t k;
+		      for (k = j + 1; k < ARRAY_SIZE (option_map); k++)
+			if (strlen (option_map[k].name) >= arglen
+			    && !strncmp (argv[i], option_map[k].name, arglen))
+			  {
+			    error ("ambiguous abbreviation %s", argv[i]);
+			    break;
+			  }
+
+		      if (k != ARRAY_SIZE (option_map))
+			break;
+		    }
+
+		  if (arglen > optlen)
+		    {
+		      /* If the option has an argument, accept that.  */
+		      if (argv[i][optlen] == '=')
+			arg = argv[i] + optlen + 1;
+
+		      /* If this mapping requires extra text at end of name,
+			 accept that as "argument".  */
+		      else if (strchr (arginfo, '*') != 0)
+			arg = argv[i] + optlen;
+
+		      /* Otherwise, extra text at end means mismatch.
+			 Try other mappings.  */
+		      else
+			continue;
+		    }
+
+		  else if (strchr (arginfo, '*') != 0)
+		    {
+		      error ("incomplete '%s' option", option_map[j].name);
+		      break;
+		    }
+
+		  /* Handle arguments.  */
+		  if (strchr (arginfo, 'a') != 0)
+		    {
+		      if (arg == 0)
+			{
+			  if (i + 1 == argc)
+			    {
+			      error ("missing argument to '%s' option",
+				     option_map[j].name);
+			      break;
+			    }
+
+			  arg = argv[++i];
+			}
+		    }
+		  else if (strchr (arginfo, '*') != 0)
+		    ;
+		  else if (strchr (arginfo, 'o') == 0)
+		    {
+		      if (arg != 0)
+			error ("extraneous argument to '%s' option",
+			       option_map[j].name);
+		      arg = 0;
+		    }
+
+		  /* Store the translation as one argv elt or as two.  */
+		  if (arg != 0 && strchr (arginfo, 'j') != 0)
+		    newv[newindex++] = concat (option_map[j].equivalent, arg,
+					       NULL);
+		  else if (arg != 0)
+		    {
+		      newv[newindex++] = option_map[j].equivalent;
+		      newv[newindex++] = arg;
+		    }
+		  else
+		    newv[newindex++] = option_map[j].equivalent;
+
+		  break;
+		}
+	    }
+	  i++;
+	}
+
+      /* Handle old-fashioned options--just copy them through,
+	 with their arguments.  */
+      else if (argv[i][0] == '-')
+	{
+	  const char *p = argv[i] + 1;
+	  int c = *p;
+	  int nskip = 1;
+
+	  if (SWITCH_TAKES_ARG (c) > (p[1] != 0))
+	    nskip += SWITCH_TAKES_ARG (c) - (p[1] != 0);
+	  else if (WORD_SWITCH_TAKES_ARG (p))
+	    nskip += WORD_SWITCH_TAKES_ARG (p);
+	  else if ((c == 'B' || c == 'b' || c == 'x')
+		   && p[1] == 0)
+	    nskip += 1;
+	  else if (! strcmp (p, "Xlinker"))
+	    nskip += 1;
+	  else if (! strcmp (p, "Xpreprocessor"))
+	    nskip += 1;
+	  else if (! strcmp (p, "Xassembler"))
+	    nskip += 1;
+
+	  /* Watch out for an option at the end of the command line that
+	     is missing arguments, and avoid skipping past the end of the
+	     command line.  */
+	  if (nskip + i > argc)
+	    nskip = argc - i;
+
+	  while (nskip > 0)
+	    {
+	      newv[newindex++] = argv[i++];
+	      nskip--;
+	    }
+	}
+      else
+	/* Ordinary operands, or +e options.  */
+	newv[newindex++] = argv[i++];
+    }
+
+  newv[newindex] = 0;
+
+  *argvp = newv;
+  *argcp = newindex;
+}
+
+static char *
+skip_whitespace (char *p)
+{
+  while (1)
+    {
+      /* A fully-blank line is a delimiter in the SPEC file and shouldn't
+	 be considered whitespace.  */
+      if (p[0] == '\n' && p[1] == '\n' && p[2] == '\n')
+	return p + 1;
+      else if (*p == '\n' || *p == ' ' || *p == '\t')
+	p++;
+      else if (*p == '#')
+	{
+	  while (*p != '\n')
+	    p++;
+	  p++;
+	}
+      else
+	break;
+    }
+
+  return p;
+}
+/* Structures to keep track of prefixes to try when looking for files.  */
+
+struct prefix_list
+{
+  const char *prefix;	      /* String to prepend to the path.  */
+  struct prefix_list *next;   /* Next in linked list.  */
+  int require_machine_suffix; /* Don't use without machine_suffix.  */
+  /* 2 means try both machine_suffix and just_machine_suffix.  */
+  int priority;		      /* Sort key - priority within list.  */
+  int os_multilib;	      /* 1 if OS multilib scheme should be used,
+				 0 for GCC multilib scheme.  */
+};
+
+struct path_prefix
+{
+  struct prefix_list *plist;  /* List of prefixes to try */
+  int max_len;                /* Max length of a prefix in PLIST */
+  const char *name;           /* Name of this list (used in config stuff) */
+};
+
+/* List of prefixes to try when looking for executables.  */
+
+static struct path_prefix exec_prefixes = { 0, 0, "exec" };
+
+/* List of prefixes to try when looking for startup (crt0) files.  */
+
+static struct path_prefix startfile_prefixes = { 0, 0, "startfile" };
+
+/* List of prefixes to try when looking for include files.  */
+
+static struct path_prefix include_prefixes = { 0, 0, "include" };
+
+/* Suffix to attach to directories searched for commands.
+   This looks like `MACHINE/VERSION/'.  */
+
+static const char *machine_suffix = 0;
+
+/* Suffix to attach to directories searched for commands.
+   This is just `MACHINE/'.  */
+
+static const char *just_machine_suffix = 0;
+
+/* Adjusted value of GCC_EXEC_PREFIX envvar.  */
+
+static const char *gcc_exec_prefix;
+
+/* Adjusted value of standard_libexec_prefix.  */
+
+static const char *gcc_libexec_prefix;
+
+/* Default prefixes to attach to command names.  */
+
+#ifndef STANDARD_STARTFILE_PREFIX_1
+#define STANDARD_STARTFILE_PREFIX_1 "/lib/"
+#endif
+#ifndef STANDARD_STARTFILE_PREFIX_2
+#define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/"
+#endif
+
+#ifdef CROSS_DIRECTORY_STRUCTURE  /* Don't use these prefixes for a cross compiler.  */
+#undef MD_EXEC_PREFIX
+#undef MD_STARTFILE_PREFIX
+#undef MD_STARTFILE_PREFIX_1
+#endif
+
+/* If no prefixes defined, use the null string, which will disable them.  */
+#ifndef MD_EXEC_PREFIX
+#define MD_EXEC_PREFIX ""
+#endif
+#ifndef MD_STARTFILE_PREFIX
+#define MD_STARTFILE_PREFIX ""
+#endif
+#ifndef MD_STARTFILE_PREFIX_1
+#define MD_STARTFILE_PREFIX_1 ""
+#endif
+
+/* These directories are locations set at configure-time based on the
+   --prefix option provided to configure.  Their initializers are
+   defined in Makefile.in.  These paths are not *directly* used when
+   gcc_exec_prefix is set because, in that case, we know where the
+   compiler has been installed, and use paths relative to that
+   location instead.  */
+static const char *const standard_exec_prefix = STANDARD_EXEC_PREFIX;
+static const char *const standard_libexec_prefix = STANDARD_LIBEXEC_PREFIX;
+static const char *const standard_bindir_prefix = STANDARD_BINDIR_PREFIX;
+static const char *const standard_startfile_prefix = STANDARD_STARTFILE_PREFIX;
+
+/* For native compilers, these are well-known paths containing
+   components that may be provided by the system.  For cross
+   compilers, these paths are not used.  */
+static const char *const standard_exec_prefix_1 = "/usr/libexec/gcc/";
+static const char *const standard_exec_prefix_2 = "/usr/lib/gcc/";
+static const char *md_exec_prefix = MD_EXEC_PREFIX;
+static const char *md_startfile_prefix = MD_STARTFILE_PREFIX;
+static const char *md_startfile_prefix_1 = MD_STARTFILE_PREFIX_1;
+static const char *const standard_startfile_prefix_1
+  = STANDARD_STARTFILE_PREFIX_1;
+static const char *const standard_startfile_prefix_2
+  = STANDARD_STARTFILE_PREFIX_2;
+
+/* A relative path to be used in finding the location of tools
+   relative to the driver.  */
+static const char *const tooldir_base_prefix = TOOLDIR_BASE_PREFIX;
+
+/* Subdirectory to use for locating libraries.  Set by
+   set_multilib_dir based on the compilation options.  */
+
+static const char *multilib_dir;
+
+/* Subdirectory to use for locating libraries in OS conventions.  Set by
+   set_multilib_dir based on the compilation options.  */
+
+static const char *multilib_os_dir;
+
+/* Structure to keep track of the specs that have been defined so far.
+   These are accessed using %(specname) or %[specname] in a compiler
+   or link spec.  */
+
+struct spec_list
+{
+				/* The following 2 fields must be first */
+				/* to allow EXTRA_SPECS to be initialized */
+  const char *name;		/* name of the spec.  */
+  const char *ptr;		/* available ptr if no static pointer */
+
+				/* The following fields are not initialized */
+				/* by EXTRA_SPECS */
+  const char **ptr_spec;	/* pointer to the spec itself.  */
+  struct spec_list *next;	/* Next spec in linked list.  */
+  int name_len;			/* length of the name */
+  int alloc_p;			/* whether string was allocated */
+};
+
+#define INIT_STATIC_SPEC(NAME,PTR) \
+{ NAME, NULL, PTR, (struct spec_list *) 0, sizeof (NAME) - 1, 0 }
+
+/* List of statically defined specs.  */
+static struct spec_list static_specs[] =
+{
+  INIT_STATIC_SPEC ("asm",			&asm_spec),
+  INIT_STATIC_SPEC ("asm_debug",		&asm_debug),
+  INIT_STATIC_SPEC ("asm_final",		&asm_final_spec),
+  INIT_STATIC_SPEC ("asm_options",		&asm_options),
+  INIT_STATIC_SPEC ("invoke_as",		&invoke_as),
+  INIT_STATIC_SPEC ("cpp",			&cpp_spec),
+  INIT_STATIC_SPEC ("cpp_options",		&cpp_options),
+  INIT_STATIC_SPEC ("cpp_debug_options",	&cpp_debug_options),
+  INIT_STATIC_SPEC ("cpp_unique_options",	&cpp_unique_options),
+  INIT_STATIC_SPEC ("trad_capable_cpp",		&trad_capable_cpp),
+  INIT_STATIC_SPEC ("cc1",			&cc1_spec),
+  INIT_STATIC_SPEC ("cc1_options",		&cc1_options),
+  INIT_STATIC_SPEC ("cc1plus",			&cc1plus_spec),
+  INIT_STATIC_SPEC ("link_gcc_c_sequence",	&link_gcc_c_sequence_spec),
+  INIT_STATIC_SPEC ("link_ssp",			&link_ssp_spec),
+  INIT_STATIC_SPEC ("endfile",			&endfile_spec),
+  INIT_STATIC_SPEC ("link",			&link_spec),
+  INIT_STATIC_SPEC ("lib",			&lib_spec),
+  INIT_STATIC_SPEC ("mfwrap",			&mfwrap_spec),
+  INIT_STATIC_SPEC ("mflib",			&mflib_spec),
+  INIT_STATIC_SPEC ("link_gomp",		&link_gomp_spec),
+  INIT_STATIC_SPEC ("libgcc",			&libgcc_spec),
+  INIT_STATIC_SPEC ("startfile",		&startfile_spec),
+  INIT_STATIC_SPEC ("switches_need_spaces",	&switches_need_spaces),
+  INIT_STATIC_SPEC ("cross_compile",		&cross_compile),
+  INIT_STATIC_SPEC ("version",			&compiler_version),
+  INIT_STATIC_SPEC ("multilib",			&multilib_select),
+  INIT_STATIC_SPEC ("multilib_defaults",	&multilib_defaults),
+  INIT_STATIC_SPEC ("multilib_extra",		&multilib_extra),
+  INIT_STATIC_SPEC ("multilib_matches",		&multilib_matches),
+  INIT_STATIC_SPEC ("multilib_exclusions",	&multilib_exclusions),
+  INIT_STATIC_SPEC ("multilib_options",		&multilib_options),
+  INIT_STATIC_SPEC ("linker",			&linker_name_spec),
+  INIT_STATIC_SPEC ("link_libgcc",		&link_libgcc_spec),
+  INIT_STATIC_SPEC ("md_exec_prefix",		&md_exec_prefix),
+  INIT_STATIC_SPEC ("md_startfile_prefix",	&md_startfile_prefix),
+  INIT_STATIC_SPEC ("md_startfile_prefix_1",	&md_startfile_prefix_1),
+  INIT_STATIC_SPEC ("startfile_prefix_spec",	&startfile_prefix_spec),
+  INIT_STATIC_SPEC ("sysroot_spec",             &sysroot_spec),
+  INIT_STATIC_SPEC ("sysroot_suffix_spec",	&sysroot_suffix_spec),
+  INIT_STATIC_SPEC ("sysroot_hdrs_suffix_spec",	&sysroot_hdrs_suffix_spec),
+};
+
+#ifdef EXTRA_SPECS		/* additional specs needed */
+/* Structure to keep track of just the first two args of a spec_list.
+   That is all that the EXTRA_SPECS macro gives us.  */
+struct spec_list_1
+{
+  const char *const name;
+  const char *const ptr;
+};
+
+static const struct spec_list_1 extra_specs_1[] = { EXTRA_SPECS };
+static struct spec_list *extra_specs = (struct spec_list *) 0;
+#endif
+
+/* List of dynamically allocates specs that have been defined so far.  */
+
+static struct spec_list *specs = (struct spec_list *) 0;
+
+/* List of static spec functions.  */
+
+static const struct spec_function static_spec_functions[] =
+{
+  { "getenv",                   getenv_spec_function },
+  { "if-exists",		if_exists_spec_function },
+  { "if-exists-else",		if_exists_else_spec_function },
+  { "replace-outfile",		replace_outfile_spec_function },
+  { "version-compare",		version_compare_spec_function },
+  { "include",			include_spec_function },
+  { "print-asm-header",		print_asm_header_spec_function },
+#ifdef EXTRA_SPEC_FUNCTIONS
+  EXTRA_SPEC_FUNCTIONS
+#endif
+  { 0, 0 }
+};
+
+static int processing_spec_function;
+
+/* Add appropriate libgcc specs to OBSTACK, taking into account
+   various permutations of -shared-libgcc, -shared, and such.  */
+
+#if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
+
+#ifndef USE_LD_AS_NEEDED
+#define USE_LD_AS_NEEDED 0
+#endif
+
+static void
+init_gcc_specs (struct obstack *obstack, const char *shared_name,
+		const char *static_name, const char *eh_name)
+{
+  char *buf;
+
+  buf = concat ("%{static|static-libgcc:", static_name, " ", eh_name, "}"
+		"%{!static:%{!static-libgcc:"
+#if USE_LD_AS_NEEDED
+		"%{!shared-libgcc:",
+		static_name, " --as-needed ", shared_name, " --no-as-needed"
+		"}"
+		"%{shared-libgcc:",
+		shared_name, "%{!shared: ", static_name, "}"
+		"}"
+#else
+		"%{!shared:"
+		"%{!shared-libgcc:", static_name, " ", eh_name, "}"
+		"%{shared-libgcc:", shared_name, " ", static_name, "}"
+		"}"
+#ifdef LINK_EH_SPEC
+		"%{shared:"
+		"%{shared-libgcc:", shared_name, "}"
+		"%{!shared-libgcc:", static_name, "}"
+		"}"
+#else
+		"%{shared:", shared_name, "}"
+#endif
+#endif
+		"}}", NULL);
+
+  obstack_grow (obstack, buf, strlen (buf));
+  free (buf);
+}
+#endif /* ENABLE_SHARED_LIBGCC */
+
+/* Initialize the specs lookup routines.  */
+
+static void
+init_spec (void)
+{
+  struct spec_list *next = (struct spec_list *) 0;
+  struct spec_list *sl   = (struct spec_list *) 0;
+  int i;
+
+  if (specs)
+    return;			/* Already initialized.  */
+
+  if (verbose_flag)
+    notice ("Using built-in specs.\n");
+
+#ifdef EXTRA_SPECS
+  extra_specs = XCNEWVEC (struct spec_list, ARRAY_SIZE (extra_specs_1));
+
+  for (i = ARRAY_SIZE (extra_specs_1) - 1; i >= 0; i--)
+    {
+      sl = &extra_specs[i];
+      sl->name = extra_specs_1[i].name;
+      sl->ptr = extra_specs_1[i].ptr;
+      sl->next = next;
+      sl->name_len = strlen (sl->name);
+      sl->ptr_spec = &sl->ptr;
+      next = sl;
+    }
+#endif
+
+  for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--)
+    {
+      sl = &static_specs[i];
+      sl->next = next;
+      next = sl;
+    }
+
+#if defined(ENABLE_SHARED_LIBGCC) && !defined(REAL_LIBGCC_SPEC)
+  /* ??? If neither -shared-libgcc nor --static-libgcc was
+     seen, then we should be making an educated guess.  Some proposed
+     heuristics for ELF include:
+
+	(1) If "-Wl,--export-dynamic", then it's a fair bet that the
+	    program will be doing dynamic loading, which will likely
+	    need the shared libgcc.
+
+	(2) If "-ldl", then it's also a fair bet that we're doing
+	    dynamic loading.
+
+	(3) For each ET_DYN we're linking against (either through -lfoo
+	    or /some/path/foo.so), check to see whether it or one of
+	    its dependencies depends on a shared libgcc.
+
+	(4) If "-shared"
+
+	    If the runtime is fixed to look for program headers instead
+	    of calling __register_frame_info at all, for each object,
+	    use the shared libgcc if any EH symbol referenced.
+
+	    If crtstuff is fixed to not invoke __register_frame_info
+	    automatically, for each object, use the shared libgcc if
+	    any non-empty unwind section found.
+
+     Doing any of this probably requires invoking an external program to
+     do the actual object file scanning.  */
+  {
+    const char *p = libgcc_spec;
+    int in_sep = 1;
+
+    /* Transform the extant libgcc_spec into one that uses the shared libgcc
+       when given the proper command line arguments.  */
+    while (*p)
+      {
+	if (in_sep && *p == '-' && strncmp (p, "-lgcc", 5) == 0)
+	  {
+	    init_gcc_specs (&obstack,
+			    "-lgcc_s"
+#ifdef USE_LIBUNWIND_EXCEPTIONS
+			    " -lunwind"
+#endif
+			    ,
+			    "-lgcc",
+			    "-lgcc_eh"
+#ifdef USE_LIBUNWIND_EXCEPTIONS
+# ifdef HAVE_LD_STATIC_DYNAMIC
+			    " %{!static:-Bstatic} -lunwind %{!static:-Bdynamic}"
+# else
+			    " -lunwind"
+# endif
+#endif
+			    );
+
+	    p += 5;
+	    in_sep = 0;
+	  }
+	else if (in_sep && *p == 'l' && strncmp (p, "libgcc.a%s", 10) == 0)
+	  {
+	    /* Ug.  We don't know shared library extensions.  Hope that
+	       systems that use this form don't do shared libraries.  */
+	    init_gcc_specs (&obstack,
+			    "-lgcc_s",
+			    "libgcc.a%s",
+			    "libgcc_eh.a%s"
+#ifdef USE_LIBUNWIND_EXCEPTIONS
+			    " -lunwind"
+#endif
+			    );
+	    p += 10;
+	    in_sep = 0;
+	  }
+	else
+	  {
+	    obstack_1grow (&obstack, *p);
+	    in_sep = (*p == ' ');
+	    p += 1;
+	  }
+      }
+
+    obstack_1grow (&obstack, '\0');
+    libgcc_spec = XOBFINISH (&obstack, const char *);
+  }
+#endif
+#ifdef USE_AS_TRADITIONAL_FORMAT
+  /* Prepend "--traditional-format" to whatever asm_spec we had before.  */
+  {
+    static const char tf[] = "--traditional-format ";
+    obstack_grow (&obstack, tf, sizeof(tf) - 1);
+    obstack_grow0 (&obstack, asm_spec, strlen (asm_spec));
+    asm_spec = XOBFINISH (&obstack, const char *);
+  }
+#endif
+#ifdef LINK_EH_SPEC
+  /* Prepend LINK_EH_SPEC to whatever link_spec we had before.  */
+  obstack_grow (&obstack, LINK_EH_SPEC, sizeof(LINK_EH_SPEC) - 1);
+  obstack_grow0 (&obstack, link_spec, strlen (link_spec));
+  link_spec = XOBFINISH (&obstack, const char *);
+#endif
+
+  specs = sl;
+}
+
+/* Change the value of spec NAME to SPEC.  If SPEC is empty, then the spec is
+   removed; If the spec starts with a + then SPEC is added to the end of the
+   current spec.  */
+
+static void
+set_spec (const char *name, const char *spec)
+{
+  struct spec_list *sl;
+  const char *old_spec;
+  int name_len = strlen (name);
+  int i;
+
+  /* If this is the first call, initialize the statically allocated specs.  */
+  if (!specs)
+    {
+      struct spec_list *next = (struct spec_list *) 0;
+      for (i = ARRAY_SIZE (static_specs) - 1; i >= 0; i--)
+	{
+	  sl = &static_specs[i];
+	  sl->next = next;
+	  next = sl;
+	}
+      specs = sl;
+    }
+
+  /* See if the spec already exists.  */
+  for (sl = specs; sl; sl = sl->next)
+    if (name_len == sl->name_len && !strcmp (sl->name, name))
+      break;
+
+  if (!sl)
+    {
+      /* Not found - make it.  */
+      sl = XNEW (struct spec_list);
+      sl->name = xstrdup (name);
+      sl->name_len = name_len;
+      sl->ptr_spec = &sl->ptr;
+      sl->alloc_p = 0;
+      *(sl->ptr_spec) = "";
+      sl->next = specs;
+      specs = sl;
+    }
+
+  old_spec = *(sl->ptr_spec);
+  *(sl->ptr_spec) = ((spec[0] == '+' && ISSPACE ((unsigned char)spec[1]))
+		     ? concat (old_spec, spec + 1, NULL)
+		     : xstrdup (spec));
+
+#ifdef DEBUG_SPECS
+  if (verbose_flag)
+    notice ("Setting spec %s to '%s'\n\n", name, *(sl->ptr_spec));
+#endif
+
+  /* Free the old spec.  */
+  if (old_spec && sl->alloc_p)
+    free (CONST_CAST(char *, old_spec));
+
+  sl->alloc_p = 1;
+}
+
+/* Accumulate a command (program name and args), and run it.  */
+
+/* Vector of pointers to arguments in the current line of specifications.  */
+
+static const char **argbuf;
+
+/* Number of elements allocated in argbuf.  */
+
+static int argbuf_length;
+
+/* Number of elements in argbuf currently in use (containing args).  */
+
+static int argbuf_index;
+
+/* Position in the argbuf array containing the name of the output file
+   (the value associated with the "-o" flag).  */
+
+static int have_o_argbuf_index = 0;
+
+/* Were the options -c or -S passed.  */
+static int have_c = 0;
+
+/* Was the option -o passed.  */
+static int have_o = 0;
+
+/* This is the list of suffixes and codes (%g/%u/%U/%j) and the associated
+   temp file.  If the HOST_BIT_BUCKET is used for %j, no entry is made for
+   it here.  */
+
+static struct temp_name {
+  const char *suffix;	/* suffix associated with the code.  */
+  int length;		/* strlen (suffix).  */
+  int unique;		/* Indicates whether %g or %u/%U was used.  */
+  const char *filename;	/* associated filename.  */
+  int filename_length;	/* strlen (filename).  */
+  struct temp_name *next;
+} *temp_names;
+
+/* Number of commands executed so far.  */
+
+static int execution_count;
+
+/* Number of commands that exited with a signal.  */
+
+static int signal_count;
+
+/* Name with which this program was invoked.  */
+
+static const char *programname;
+
+/* Allocate the argument vector.  */
+
+static void
+alloc_args (void)
+{
+  argbuf_length = 10;
+  argbuf = XNEWVEC (const char *, argbuf_length);
+}
+
+/* Clear out the vector of arguments (after a command is executed).  */
+
+static void
+clear_args (void)
+{
+  argbuf_index = 0;
+}
+
+/* Add one argument to the vector at the end.
+   This is done when a space is seen or at the end of the line.
+   If DELETE_ALWAYS is nonzero, the arg is a filename
+    and the file should be deleted eventually.
+   If DELETE_FAILURE is nonzero, the arg is a filename
+    and the file should be deleted if this compilation fails.  */
+
+static void
+store_arg (const char *arg, int delete_always, int delete_failure)
+{
+  if (argbuf_index + 1 == argbuf_length)
+    argbuf = XRESIZEVEC (const char *, argbuf, (argbuf_length *= 2));
+
+  argbuf[argbuf_index++] = arg;
+  argbuf[argbuf_index] = 0;
+
+  if (strcmp (arg, "-o") == 0)
+    have_o_argbuf_index = argbuf_index;
+  if (delete_always || delete_failure)
+    record_temp_file (arg, delete_always, delete_failure);
+}
+
+/* Load specs from a file name named FILENAME, replacing occurrences of
+   various different types of line-endings, \r\n, \n\r and just \r, with
+   a single \n.  */
+
+static char *
+load_specs (const char *filename)
+{
+  int desc;
+  int readlen;
+  struct stat statbuf;
+  char *buffer;
+  char *buffer_p;
+  char *specs;
+  char *specs_p;
+
+  if (verbose_flag)
+    notice ("Reading specs from %s\n", filename);
+
+  /* Open and stat the file.  */
+  desc = open (filename, O_RDONLY, 0);
+  if (desc < 0)
+    pfatal_with_name (filename);
+  if (stat (filename, &statbuf) < 0)
+    pfatal_with_name (filename);
+
+  /* Read contents of file into BUFFER.  */
+  buffer = XNEWVEC (char, statbuf.st_size + 1);
+  readlen = read (desc, buffer, (unsigned) statbuf.st_size);
+  if (readlen < 0)
+    pfatal_with_name (filename);
+  buffer[readlen] = 0;
+  close (desc);
+
+  specs = XNEWVEC (char, readlen + 1);
+  specs_p = specs;
+  for (buffer_p = buffer; buffer_p && *buffer_p; buffer_p++)
+    {
+      int skip = 0;
+      char c = *buffer_p;
+      if (c == '\r')
+	{
+	  if (buffer_p > buffer && *(buffer_p - 1) == '\n')	/* \n\r */
+	    skip = 1;
+	  else if (*(buffer_p + 1) == '\n')			/* \r\n */
+	    skip = 1;
+	  else							/* \r */
+	    c = '\n';
+	}
+      if (! skip)
+	*specs_p++ = c;
+    }
+  *specs_p = '\0';
+
+  free (buffer);
+  return (specs);
+}
+
+/* Read compilation specs from a file named FILENAME,
+   replacing the default ones.
+
+   A suffix which starts with `*' is a definition for
+   one of the machine-specific sub-specs.  The "suffix" should be
+   *asm, *cc1, *cpp, *link, *startfile, etc.
+   The corresponding spec is stored in asm_spec, etc.,
+   rather than in the `compilers' vector.
+
+   Anything invalid in the file is a fatal error.  */
+
+static void
+read_specs (const char *filename, int main_p)
+{
+  char *buffer;
+  char *p;
+
+  buffer = load_specs (filename);
+
+  /* Scan BUFFER for specs, putting them in the vector.  */
+  p = buffer;
+  while (1)
+    {
+      char *suffix;
+      char *spec;
+      char *in, *out, *p1, *p2, *p3;
+
+      /* Advance P in BUFFER to the next nonblank nocomment line.  */
+      p = skip_whitespace (p);
+      if (*p == 0)
+	break;
+
+      /* Is this a special command that starts with '%'? */
+      /* Don't allow this for the main specs file, since it would
+	 encourage people to overwrite it.  */
+      if (*p == '%' && !main_p)
+	{
+	  p1 = p;
+	  while (*p && *p != '\n')
+	    p++;
+
+	  /* Skip '\n'.  */
+	  p++;
+
+	  if (!strncmp (p1, "%include", sizeof ("%include") - 1)
+	      && (p1[sizeof "%include" - 1] == ' '
+		  || p1[sizeof "%include" - 1] == '\t'))
+	    {
+	      char *new_filename;
+
+	      p1 += sizeof ("%include");
+	      while (*p1 == ' ' || *p1 == '\t')
+		p1++;
+
+	      if (*p1++ != '<' || p[-2] != '>')
+		fatal ("specs %%include syntax malformed after %ld characters",
+		       (long) (p1 - buffer + 1));
+
+	      p[-2] = '\0';
+	      new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true);
+	      read_specs (new_filename ? new_filename : p1, FALSE);
+	      continue;
+	    }
+	  else if (!strncmp (p1, "%include_noerr", sizeof "%include_noerr" - 1)
+		   && (p1[sizeof "%include_noerr" - 1] == ' '
+		       || p1[sizeof "%include_noerr" - 1] == '\t'))
+	    {
+	      char *new_filename;
+
+	      p1 += sizeof "%include_noerr";
+	      while (*p1 == ' ' || *p1 == '\t')
+		p1++;
+
+	      if (*p1++ != '<' || p[-2] != '>')
+		fatal ("specs %%include syntax malformed after %ld characters",
+		       (long) (p1 - buffer + 1));
+
+	      p[-2] = '\0';
+	      new_filename = find_a_file (&startfile_prefixes, p1, R_OK, true);
+	      if (new_filename)
+		read_specs (new_filename, FALSE);
+	      else if (verbose_flag)
+		notice ("could not find specs file %s\n", p1);
+	      continue;
+	    }
+	  else if (!strncmp (p1, "%rename", sizeof "%rename" - 1)
+		   && (p1[sizeof "%rename" - 1] == ' '
+		       || p1[sizeof "%rename" - 1] == '\t'))
+	    {
+	      int name_len;
+	      struct spec_list *sl;
+	      struct spec_list *newsl;
+
+	      /* Get original name.  */
+	      p1 += sizeof "%rename";
+	      while (*p1 == ' ' || *p1 == '\t')
+		p1++;
+
+	      if (! ISALPHA ((unsigned char) *p1))
+		fatal ("specs %%rename syntax malformed after %ld characters",
+		       (long) (p1 - buffer));
+
+	      p2 = p1;
+	      while (*p2 && !ISSPACE ((unsigned char) *p2))
+		p2++;
+
+	      if (*p2 != ' ' && *p2 != '\t')
+		fatal ("specs %%rename syntax malformed after %ld characters",
+		       (long) (p2 - buffer));
+
+	      name_len = p2 - p1;
+	      *p2++ = '\0';
+	      while (*p2 == ' ' || *p2 == '\t')
+		p2++;
+
+	      if (! ISALPHA ((unsigned char) *p2))
+		fatal ("specs %%rename syntax malformed after %ld characters",
+		       (long) (p2 - buffer));
+
+	      /* Get new spec name.  */
+	      p3 = p2;
+	      while (*p3 && !ISSPACE ((unsigned char) *p3))
+		p3++;
+
+	      if (p3 != p - 1)
+		fatal ("specs %%rename syntax malformed after %ld characters",
+		       (long) (p3 - buffer));
+	      *p3 = '\0';
+
+	      for (sl = specs; sl; sl = sl->next)
+		if (name_len == sl->name_len && !strcmp (sl->name, p1))
+		  break;
+
+	      if (!sl)
+		fatal ("specs %s spec was not found to be renamed", p1);
+
+	      if (strcmp (p1, p2) == 0)
+		continue;
+
+	      for (newsl = specs; newsl; newsl = newsl->next)
+		if (strcmp (newsl->name, p2) == 0)
+		  fatal ("%s: attempt to rename spec '%s' to already defined spec '%s'",
+		    filename, p1, p2);
+
+	      if (verbose_flag)
+		{
+		  notice ("rename spec %s to %s\n", p1, p2);
+#ifdef DEBUG_SPECS
+		  notice ("spec is '%s'\n\n", *(sl->ptr_spec));
+#endif
+		}
+
+	      set_spec (p2, *(sl->ptr_spec));
+	      if (sl->alloc_p)
+		free (CONST_CAST (char *, *(sl->ptr_spec)));
+
+	      *(sl->ptr_spec) = "";
+	      sl->alloc_p = 0;
+	      continue;
+	    }
+	  else
+	    fatal ("specs unknown %% command after %ld characters",
+		   (long) (p1 - buffer));
+	}
+
+      /* Find the colon that should end the suffix.  */
+      p1 = p;
+      while (*p1 && *p1 != ':' && *p1 != '\n')
+	p1++;
+
+      /* The colon shouldn't be missing.  */
+      if (*p1 != ':')
+	fatal ("specs file malformed after %ld characters",
+	       (long) (p1 - buffer));
+
+      /* Skip back over trailing whitespace.  */
+      p2 = p1;
+      while (p2 > buffer && (p2[-1] == ' ' || p2[-1] == '\t'))
+	p2--;
+
+      /* Copy the suffix to a string.  */
+      suffix = save_string (p, p2 - p);
+      /* Find the next line.  */
+      p = skip_whitespace (p1 + 1);
+      if (p[1] == 0)
+	fatal ("specs file malformed after %ld characters",
+	       (long) (p - buffer));
+
+      p1 = p;
+      /* Find next blank line or end of string.  */
+      while (*p1 && !(*p1 == '\n' && (p1[1] == '\n' || p1[1] == '\0')))
+	p1++;
+
+      /* Specs end at the blank line and do not include the newline.  */
+      spec = save_string (p, p1 - p);
+      p = p1;
+
+      /* Delete backslash-newline sequences from the spec.  */
+      in = spec;
+      out = spec;
+      while (*in != 0)
+	{
+	  if (in[0] == '\\' && in[1] == '\n')
+	    in += 2;
+	  else if (in[0] == '#')
+	    while (*in && *in != '\n')
+	      in++;
+
+	  else
+	    *out++ = *in++;
+	}
+      *out = 0;
+
+      if (suffix[0] == '*')
+	{
+	  if (! strcmp (suffix, "*link_command"))
+	    link_command_spec = spec;
+	  else
+	    set_spec (suffix + 1, spec);
+	}
+      else
+	{
+	  /* Add this pair to the vector.  */
+	  compilers
+	    = XRESIZEVEC (struct compiler, compilers, n_compilers + 2);
+
+	  compilers[n_compilers].suffix = suffix;
+	  compilers[n_compilers].spec = spec;
+	  n_compilers++;
+	  memset (&compilers[n_compilers], 0, sizeof compilers[n_compilers]);
+	}
+
+      if (*suffix == 0)
+	link_command_spec = spec;
+    }
+
+  if (link_command_spec == 0)
+    fatal ("spec file has no spec for linking");
+}
+
+/* Record the names of temporary files we tell compilers to write,
+   and delete them at the end of the run.  */
+
+/* This is the common prefix we use to make temp file names.
+   It is chosen once for each run of this program.
+   It is substituted into a spec by %g or %j.
+   Thus, all temp file names contain this prefix.
+   In practice, all temp file names start with this prefix.
+
+   This prefix comes from the envvar TMPDIR if it is defined;
+   otherwise, from the P_tmpdir macro if that is defined;
+   otherwise, in /usr/tmp or /tmp;
+   or finally the current directory if all else fails.  */
+
+static const char *temp_filename;
+
+/* Length of the prefix.  */
+
+static int temp_filename_length;
+
+/* Define the list of temporary files to delete.  */
+
+struct temp_file
+{
+  const char *name;
+  struct temp_file *next;
+};
+
+/* Queue of files to delete on success or failure of compilation.  */
+static struct temp_file *always_delete_queue;
+/* Queue of files to delete on failure of compilation.  */
+static struct temp_file *failure_delete_queue;
+
+/* Record FILENAME as a file to be deleted automatically.
+   ALWAYS_DELETE nonzero means delete it if all compilation succeeds;
+   otherwise delete it in any case.
+   FAIL_DELETE nonzero means delete it if a compilation step fails;
+   otherwise delete it in any case.  */
+
+void
+record_temp_file (const char *filename, int always_delete, int fail_delete)
+{
+  char *const name = xstrdup (filename);
+
+  if (always_delete)
+    {
+      struct temp_file *temp;
+      for (temp = always_delete_queue; temp; temp = temp->next)
+	if (! strcmp (name, temp->name))
+	  goto already1;
+
+      temp = XNEW (struct temp_file);
+      temp->next = always_delete_queue;
+      temp->name = name;
+      always_delete_queue = temp;
+
+    already1:;
+    }
+
+  if (fail_delete)
+    {
+      struct temp_file *temp;
+      for (temp = failure_delete_queue; temp; temp = temp->next)
+	if (! strcmp (name, temp->name))
+	  goto already2;
+
+      temp = XNEW (struct temp_file);
+      temp->next = failure_delete_queue;
+      temp->name = name;
+      failure_delete_queue = temp;
+
+    already2:;
+    }
+}
+
+/* Delete all the temporary files whose names we previously recorded.  */
+
+#ifndef DELETE_IF_ORDINARY
+#define DELETE_IF_ORDINARY(NAME,ST,VERBOSE_FLAG)        \
+do                                                      \
+  {                                                     \
+    if (stat (NAME, &ST) >= 0 && S_ISREG (ST.st_mode))  \
+      if (unlink (NAME) < 0)                            \
+	if (VERBOSE_FLAG)                               \
+	  perror_with_name (NAME);                      \
+  } while (0)
+#endif
+
+static void
+delete_if_ordinary (const char *name)
+{
+  struct stat st;
+#ifdef DEBUG
+  int i, c;
+
+  printf ("Delete %s? (y or n) ", name);
+  fflush (stdout);
+  i = getchar ();
+  if (i != '\n')
+    while ((c = getchar ()) != '\n' && c != EOF)
+      ;
+
+  if (i == 'y' || i == 'Y')
+#endif /* DEBUG */
+  DELETE_IF_ORDINARY (name, st, verbose_flag);
+}
+
+static void
+delete_temp_files (void)
+{
+  struct temp_file *temp;
+
+  for (temp = always_delete_queue; temp; temp = temp->next)
+    delete_if_ordinary (temp->name);
+  always_delete_queue = 0;
+}
+
+/* Delete all the files to be deleted on error.  */
+
+static void
+delete_failure_queue (void)
+{
+  struct temp_file *temp;
+
+  for (temp = failure_delete_queue; temp; temp = temp->next)
+    delete_if_ordinary (temp->name);
+}
+
+static void
+clear_failure_queue (void)
+{
+  failure_delete_queue = 0;
+}
+
+/* Call CALLBACK for each path in PATHS, breaking out early if CALLBACK
+   returns non-NULL.
+   If DO_MULTI is true iterate over the paths twice, first with multilib
+   suffix then without, otherwise iterate over the paths once without
+   adding a multilib suffix.  When DO_MULTI is true, some attempt is made
+   to avoid visiting the same path twice, but we could do better.  For
+   instance, /usr/lib/../lib is considered different from /usr/lib.
+   At least EXTRA_SPACE chars past the end of the path passed to
+   CALLBACK are available for use by the callback.
+   CALLBACK_INFO allows extra parameters to be passed to CALLBACK.
+
+   Returns the value returned by CALLBACK.  */
+
+static void *
+for_each_path (const struct path_prefix *paths,
+	       bool do_multi,
+	       size_t extra_space,
+	       void *(*callback) (char *, void *),
+	       void *callback_info)
+{
+  struct prefix_list *pl;
+  const char *multi_dir = NULL;
+  const char *multi_os_dir = NULL;
+  const char *multi_suffix;
+  const char *just_multi_suffix;
+  char *path = NULL;
+  void *ret = NULL;
+  bool skip_multi_dir = false;
+  bool skip_multi_os_dir = false;
+
+  multi_suffix = machine_suffix;
+  just_multi_suffix = just_machine_suffix;
+  if (do_multi && multilib_dir && strcmp (multilib_dir, ".") != 0)
+    {
+      multi_dir = concat (multilib_dir, dir_separator_str, NULL);
+      multi_suffix = concat (multi_suffix, multi_dir, NULL);
+      just_multi_suffix = concat (just_multi_suffix, multi_dir, NULL);
+    }
+  if (do_multi && multilib_os_dir && strcmp (multilib_os_dir, ".") != 0)
+    multi_os_dir = concat (multilib_os_dir, dir_separator_str, NULL);
+
+  while (1)
+    {
+      size_t multi_dir_len = 0;
+      size_t multi_os_dir_len = 0;
+      size_t suffix_len;
+      size_t just_suffix_len;
+      size_t len;
+
+      if (multi_dir)
+	multi_dir_len = strlen (multi_dir);
+      if (multi_os_dir)
+	multi_os_dir_len = strlen (multi_os_dir);
+      suffix_len = strlen (multi_suffix);
+      just_suffix_len = strlen (just_multi_suffix);
+
+      if (path == NULL)
+	{
+	  len = paths->max_len + extra_space + 1;
+	  if (suffix_len > multi_os_dir_len)
+	    len += suffix_len;
+	  else
+	    len += multi_os_dir_len;
+	  path = XNEWVEC (char, len);
+	}
+
+      for (pl = paths->plist; pl != 0; pl = pl->next)
+	{
+	  len = strlen (pl->prefix);
+	  memcpy (path, pl->prefix, len);
+
+	  /* Look first in MACHINE/VERSION subdirectory.  */
+	  if (!skip_multi_dir)
+	    {
+	      memcpy (path + len, multi_suffix, suffix_len + 1);
+	      ret = callback (path, callback_info);
+	      if (ret)
+		break;
+	    }
+
+	  /* Some paths are tried with just the machine (ie. target)
+	     subdir.  This is used for finding as, ld, etc.  */
+	  if (!skip_multi_dir
+	      && pl->require_machine_suffix == 2)
+	    {
+	      memcpy (path + len, just_multi_suffix, just_suffix_len + 1);
+	      ret = callback (path, callback_info);
+	      if (ret)
+		break;
+	    }
+
+	  /* Now try the base path.  */
+	  if (!pl->require_machine_suffix
+	      && !(pl->os_multilib ? skip_multi_os_dir : skip_multi_dir))
+	    {
+	      const char *this_multi;
+	      size_t this_multi_len;
+
+	      if (pl->os_multilib)
+		{
+		  this_multi = multi_os_dir;
+		  this_multi_len = multi_os_dir_len;
+		}
+	      else
+		{
+		  this_multi = multi_dir;
+		  this_multi_len = multi_dir_len;
+		}
+
+	      if (this_multi_len)
+		memcpy (path + len, this_multi, this_multi_len + 1);
+	      else
+		path[len] = '\0';
+
+	      ret = callback (path, callback_info);
+	      if (ret)
+		break;
+	    }
+	}
+      if (pl)
+	break;
+
+      if (multi_dir == NULL && multi_os_dir == NULL)
+	break;
+
+      /* Run through the paths again, this time without multilibs.
+	 Don't repeat any we have already seen.  */
+      if (multi_dir)
+	{
+	  free (CONST_CAST (char *, multi_dir));
+	  multi_dir = NULL;
+	  free (CONST_CAST (char *, multi_suffix));
+	  multi_suffix = machine_suffix;
+	  free (CONST_CAST (char *, just_multi_suffix));
+	  just_multi_suffix = just_machine_suffix;
+	}
+      else
+	skip_multi_dir = true;
+      if (multi_os_dir)
+	{
+	  free (CONST_CAST (char *, multi_os_dir));
+	  multi_os_dir = NULL;
+	}
+      else
+	skip_multi_os_dir = true;
+    }
+
+  if (multi_dir)
+    {
+      free (CONST_CAST (char *, multi_dir));
+      free (CONST_CAST (char *, multi_suffix));
+      free (CONST_CAST (char *, just_multi_suffix));
+    }
+  if (multi_os_dir)
+    free (CONST_CAST (char *, multi_os_dir));
+  if (ret != path)
+    free (path);
+  return ret;
+}
+
+/* Callback for build_search_list.  Adds path to obstack being built.  */
+
+struct add_to_obstack_info {
+  struct obstack *ob;
+  bool check_dir;
+  bool first_time;
+};
+
+static void *
+add_to_obstack (char *path, void *data)
+{
+  struct add_to_obstack_info *info = (struct add_to_obstack_info *) data;
+
+  if (info->check_dir && !is_directory (path, false))
+    return NULL;
+
+  if (!info->first_time)
+    obstack_1grow (info->ob, PATH_SEPARATOR);
+
+  obstack_grow (info->ob, path, strlen (path));
+
+  info->first_time = false;
+  return NULL;
+}
+
+/* Add or change the value of an environment variable, outputting the
+   change to standard error if in verbose mode.  */
+static void
+xputenv (const char *string)
+{
+  if (verbose_flag)
+    notice ("%s\n", string);
+  putenv (CONST_CAST (char *, string));
+}
+
+/* Build a list of search directories from PATHS.
+   PREFIX is a string to prepend to the list.
+   If CHECK_DIR_P is true we ensure the directory exists.
+   If DO_MULTI is true, multilib paths are output first, then
+   non-multilib paths.
+   This is used mostly by putenv_from_prefixes so we use `collect_obstack'.
+   It is also used by the --print-search-dirs flag.  */
+
+static char *
+build_search_list (const struct path_prefix *paths, const char *prefix,
+		   bool check_dir, bool do_multi)
+{
+  struct add_to_obstack_info info;
+
+  info.ob = &collect_obstack;
+  info.check_dir = check_dir;
+  info.first_time = true;
+
+  obstack_grow (&collect_obstack, prefix, strlen (prefix));
+  obstack_1grow (&collect_obstack, '=');
+
+  for_each_path (paths, do_multi, 0, add_to_obstack, &info);
+
+  obstack_1grow (&collect_obstack, '\0');
+  return XOBFINISH (&collect_obstack, char *);
+}
+
+/* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables
+   for collect.  */
+
+static void
+putenv_from_prefixes (const struct path_prefix *paths, const char *env_var,
+		      bool do_multi)
+{
+  xputenv (build_search_list (paths, env_var, true, do_multi));
+}
+
+/* Check whether NAME can be accessed in MODE.  This is like access,
+   except that it never considers directories to be executable.  */
+
+static int
+access_check (const char *name, int mode)
+{
+  if (mode == X_OK)
+    {
+      struct stat st;
+
+      if (stat (name, &st) < 0
+	  || S_ISDIR (st.st_mode))
+	return -1;
+    }
+
+  return access (name, mode);
+}
+
+/* Callback for find_a_file.  Appends the file name to the directory
+   path.  If the resulting file exists in the right mode, return the
+   full pathname to the file.  */
+
+struct file_at_path_info {
+  const char *name;
+  const char *suffix;
+  int name_len;
+  int suffix_len;
+  int mode;
+};
+
+static void *
+file_at_path (char *path, void *data)
+{
+  struct file_at_path_info *info = (struct file_at_path_info *) data;
+  size_t len = strlen (path);
+
+  memcpy (path + len, info->name, info->name_len);
+  len += info->name_len;
+
+  /* Some systems have a suffix for executable files.
+     So try appending that first.  */
+  if (info->suffix_len)
+    {
+      memcpy (path + len, info->suffix, info->suffix_len + 1);
+      if (access_check (path, info->mode) == 0)
+	return path;
+    }
+
+  path[len] = '\0';
+  if (access_check (path, info->mode) == 0)
+    return path;
+
+  return NULL;
+}
+
+/* Search for NAME using the prefix list PREFIXES.  MODE is passed to
+   access to check permissions.  If DO_MULTI is true, search multilib
+   paths then non-multilib paths, otherwise do not search multilib paths.
+   Return 0 if not found, otherwise return its name, allocated with malloc.  */
+
+static char *
+find_a_file (const struct path_prefix *pprefix, const char *name, int mode,
+	     bool do_multi)
+{
+  struct file_at_path_info info;
+
+#ifdef DEFAULT_ASSEMBLER
+  if (! strcmp (name, "as") && access (DEFAULT_ASSEMBLER, mode) == 0)
+    return xstrdup (DEFAULT_ASSEMBLER);
+#endif
+
+#ifdef DEFAULT_LINKER
+  if (! strcmp(name, "ld") && access (DEFAULT_LINKER, mode) == 0)
+    return xstrdup (DEFAULT_LINKER);
+#endif
+
+  /* Determine the filename to execute (special case for absolute paths).  */
+
+  if (IS_ABSOLUTE_PATH (name))
+    {
+      if (access (name, mode) == 0)
+	return xstrdup (name);
+
+      return NULL;
+    }
+
+  info.name = name;
+  info.suffix = (mode & X_OK) != 0 ? HOST_EXECUTABLE_SUFFIX : "";
+  info.name_len = strlen (info.name);
+  info.suffix_len = strlen (info.suffix);
+  info.mode = mode;
+
+  return (char*) for_each_path (pprefix, do_multi,
+				info.name_len + info.suffix_len,
+				file_at_path, &info);
+}
+
+/* Ranking of prefixes in the sort list. -B prefixes are put before
+   all others.  */
+
+enum path_prefix_priority
+{
+  PREFIX_PRIORITY_B_OPT,
+  PREFIX_PRIORITY_LAST
+};
+
+/* Add an entry for PREFIX in PLIST.  The PLIST is kept in ascending
+   order according to PRIORITY.  Within each PRIORITY, new entries are
+   appended.
+
+   If WARN is nonzero, we will warn if no file is found
+   through this prefix.  WARN should point to an int
+   which will be set to 1 if this entry is used.
+
+   COMPONENT is the value to be passed to update_path.
+
+   REQUIRE_MACHINE_SUFFIX is 1 if this prefix can't be used without
+   the complete value of machine_suffix.
+   2 means try both machine_suffix and just_machine_suffix.  */
+
+static void
+add_prefix (struct path_prefix *pprefix, const char *prefix,
+	    const char *component, /* enum prefix_priority */ int priority,
+	    int require_machine_suffix, int os_multilib)
+{
+  struct prefix_list *pl, **prev;
+  int len;
+
+  for (prev = &pprefix->plist;
+       (*prev) != NULL && (*prev)->priority <= priority;
+       prev = &(*prev)->next)
+    ;
+
+  /* Keep track of the longest prefix.  */
+
+  prefix = update_path (prefix, component);
+  len = strlen (prefix);
+  if (len > pprefix->max_len)
+    pprefix->max_len = len;
+
+  pl = XNEW (struct prefix_list);
+  pl->prefix = prefix;
+  pl->require_machine_suffix = require_machine_suffix;
+  pl->priority = priority;
+  pl->os_multilib = os_multilib;
+
+  /* Insert after PREV.  */
+  pl->next = (*prev);
+  (*prev) = pl;
+}
+
+/* Same as add_prefix, but prepending target_system_root to prefix.  */
+/* The target_system_root prefix has been relocated by gcc_exec_prefix.  */
+static void
+add_sysrooted_prefix (struct path_prefix *pprefix, const char *prefix,
+		      const char *component,
+		      /* enum prefix_priority */ int priority,
+		      int require_machine_suffix, int os_multilib)
+{
+  if (!IS_ABSOLUTE_PATH (prefix))
+    fatal ("system path '%s' is not absolute", prefix);
+
+  if (target_system_root)
+    {
+      if (target_sysroot_suffix)
+	  prefix = concat (target_sysroot_suffix, prefix, NULL);
+      prefix = concat (target_system_root, prefix, NULL);
+
+      /* We have to override this because GCC's notion of sysroot
+	 moves along with GCC.  */
+      component = "GCC";
+    }
+
+  add_prefix (pprefix, prefix, component, priority,
+	      require_machine_suffix, os_multilib);
+}
+
+/* Execute the command specified by the arguments on the current line of spec.
+   When using pipes, this includes several piped-together commands
+   with `|' between them.
+
+   Return 0 if successful, -1 if failed.  */
+
+static int
+execute (void)
+{
+  int i;
+  int n_commands;		/* # of command.  */
+  char *string;
+  struct pex_obj *pex;
+  struct command
+  {
+    const char *prog;		/* program name.  */
+    const char **argv;		/* vector of args.  */
+  };
+
+  struct command *commands;	/* each command buffer with above info.  */
+
+  gcc_assert (!processing_spec_function);
+
+  if (wrapper_string)
+    {
+      string = find_a_file (&exec_prefixes, argbuf[0], X_OK, false);
+      argbuf[0] = (string) ? string : argbuf[0];
+      insert_wrapper (wrapper_string);
+    }
+
+  /* Count # of piped commands.  */
+  for (n_commands = 1, i = 0; i < argbuf_index; i++)
+    if (strcmp (argbuf[i], "|") == 0)
+      n_commands++;
+
+  /* Get storage for each command.  */
+  commands = (struct command *) alloca (n_commands * sizeof (struct command));
+
+  /* Split argbuf into its separate piped processes,
+     and record info about each one.
+     Also search for the programs that are to be run.  */
+
+  commands[0].prog = argbuf[0]; /* first command.  */
+  commands[0].argv = &argbuf[0];
+ 
+  if (!wrapper_string)
+    {
+      string = find_a_file (&exec_prefixes, commands[0].prog, X_OK, false);
+      commands[0].argv[0] = (string) ? string : commands[0].argv[0];
+    }
+
+  for (n_commands = 1, i = 0; i < argbuf_index; i++)
+    if (strcmp (argbuf[i], "|") == 0)
+      {				/* each command.  */
+#if defined (__MSDOS__) || defined (OS2) || defined (VMS)
+	fatal ("-pipe not supported");
+#endif
+	argbuf[i] = 0;	/* termination of command args.  */
+	commands[n_commands].prog = argbuf[i + 1];
+	commands[n_commands].argv = &argbuf[i + 1];
+	string = find_a_file (&exec_prefixes, commands[n_commands].prog,
+			      X_OK, false);
+	if (string)
+	  commands[n_commands].argv[0] = string;
+	n_commands++;
+      }
+
+  argbuf[argbuf_index] = 0;
+
+  /* If -v, print what we are about to do, and maybe query.  */
+
+  if (verbose_flag)
+    {
+      /* For help listings, put a blank line between sub-processes.  */
+      if (print_help_list)
+	fputc ('\n', stderr);
+
+      /* Print each piped command as a separate line.  */
+      for (i = 0; i < n_commands; i++)
+	{
+	  const char *const *j;
+
+	  if (verbose_only_flag)
+	    {
+	      for (j = commands[i].argv; *j; j++)
+		{
+		  const char *p;
+		  fprintf (stderr, " \"");
+		  for (p = *j; *p; ++p)
+		    {
+		      if (*p == '"' || *p == '\\' || *p == '$')
+			fputc ('\\', stderr);
+		      fputc (*p, stderr);
+		    }
+		  fputc ('"', stderr);
+		}
+	    }
+	  else
+	    for (j = commands[i].argv; *j; j++)
+	      fprintf (stderr, " %s", *j);
+
+	  /* Print a pipe symbol after all but the last command.  */
+	  if (i + 1 != n_commands)
+	    fprintf (stderr, " |");
+	  fprintf (stderr, "\n");
+	}
+      fflush (stderr);
+      if (verbose_only_flag != 0)
+        {
+	  /* verbose_only_flag should act as if the spec was
+	     executed, so increment execution_count before
+	     returning.  This prevents spurious warnings about
+	     unused linker input files, etc.  */
+	  execution_count++;
+	  return 0;
+        }
+#ifdef DEBUG
+      notice ("\nGo ahead? (y or n) ");
+      fflush (stderr);
+      i = getchar ();
+      if (i != '\n')
+	while (getchar () != '\n')
+	  ;
+
+      if (i != 'y' && i != 'Y')
+	return 0;
+#endif /* DEBUG */
+    }
+
+#ifdef ENABLE_VALGRIND_CHECKING
+  /* Run the each command through valgrind.  To simplify prepending the
+     path to valgrind and the option "-q" (for quiet operation unless
+     something triggers), we allocate a separate argv array.  */
+
+  for (i = 0; i < n_commands; i++)
+    {
+      const char **argv;
+      int argc;
+      int j;
+
+      for (argc = 0; commands[i].argv[argc] != NULL; argc++)
+	;
+
+      argv = XALLOCAVEC (const char *, argc + 3);
+
+      argv[0] = VALGRIND_PATH;
+      argv[1] = "-q";
+      for (j = 2; j < argc + 2; j++)
+	argv[j] = commands[i].argv[j - 2];
+      argv[j] = NULL;
+
+      commands[i].argv = argv;
+      commands[i].prog = argv[0];
+    }
+#endif
+
+  /* Run each piped subprocess.  */
+
+  pex = pex_init (PEX_USE_PIPES | (report_times ? PEX_RECORD_TIMES : 0),
+		  programname, temp_filename);
+  if (pex == NULL)
+    pfatal_with_name (_("pex_init failed"));
+
+  for (i = 0; i < n_commands; i++)
+    {
+      const char *errmsg;
+      int err;
+      const char *string = commands[i].argv[0];
+
+      errmsg = pex_run (pex,
+			((i + 1 == n_commands ? PEX_LAST : 0)
+			 | (string == commands[i].prog ? PEX_SEARCH : 0)),
+			string, CONST_CAST (char **, commands[i].argv),
+			NULL, NULL, &err);
+      if (errmsg != NULL)
+	{
+	  if (err == 0)
+	    fatal (errmsg);
+	  else
+	    {
+	      errno = err;
+	      pfatal_with_name (errmsg);
+	    }
+	}
+
+      if (string != commands[i].prog)
+	free (CONST_CAST (char *, string));
+    }
+
+  execution_count++;
+
+  /* Wait for all the subprocesses to finish.  */
+
+  {
+    int *statuses;
+    struct pex_time *times = NULL;
+    int ret_code = 0;
+
+    statuses = (int *) alloca (n_commands * sizeof (int));
+    if (!pex_get_status (pex, n_commands, statuses))
+      pfatal_with_name (_("failed to get exit status"));
+
+    if (report_times)
+      {
+	times = (struct pex_time *) alloca (n_commands * sizeof (struct pex_time));
+	if (!pex_get_times (pex, n_commands, times))
+	  pfatal_with_name (_("failed to get process times"));
+      }
+
+    pex_free (pex);
+
+    for (i = 0; i < n_commands; ++i)
+      {
+	int status = statuses[i];
+
+	if (WIFSIGNALED (status))
+	  {
+#ifdef SIGPIPE
+	    /* SIGPIPE is a special case.  It happens in -pipe mode
+	       when the compiler dies before the preprocessor is done,
+	       or the assembler dies before the compiler is done.
+	       There's generally been an error already, and this is
+	       just fallout.  So don't generate another error unless
+	       we would otherwise have succeeded.  */
+	    if (WTERMSIG (status) == SIGPIPE
+		&& (signal_count || greatest_status >= MIN_FATAL_STATUS))
+	      {
+		signal_count++;
+		ret_code = -1;
+	      }
+	    else
+#endif
+	      fatal_ice ("\
+Internal error: %s (program %s)\n\
+Please submit a full bug report.\n\
+See %s for instructions.",
+		 	strsignal (WTERMSIG (status)), commands[i].prog,
+		 	bug_report_url);
+	  }
+	else if (WIFEXITED (status)
+		 && WEXITSTATUS (status) >= MIN_FATAL_STATUS)
+	  {
+	    if (WEXITSTATUS (status) > greatest_status)
+	      greatest_status = WEXITSTATUS (status);
+	    ret_code = -1;
+	  }
+
+	if (report_times)
+	  {
+	    struct pex_time *pt = &times[i];
+	    double ut, st;
+
+	    ut = ((double) pt->user_seconds
+		  + (double) pt->user_microseconds / 1.0e6);
+	    st = ((double) pt->system_seconds
+		  + (double) pt->system_microseconds / 1.0e6);
+
+	    if (ut + st != 0)
+	      notice ("# %s %.2f %.2f\n", commands[i].prog, ut, st);
+	  }
+      }
+
+    return ret_code;
+  }
+}
+
+/* Find all the switches given to us
+   and make a vector describing them.
+   The elements of the vector are strings, one per switch given.
+   If a switch uses following arguments, then the `part1' field
+   is the switch itself and the `args' field
+   is a null-terminated vector containing the following arguments.
+   Bits in the `live_cond' field are:
+   SWITCH_LIVE to indicate this switch is true in a conditional spec.
+   SWITCH_FALSE to indicate this switch is overridden by a later switch.
+   SWITCH_IGNORE to indicate this switch should be ignored (used in %<S).
+   The `validated' field is nonzero if any spec has looked at this switch;
+   if it remains zero at the end of the run, it must be meaningless.  */
+
+#define SWITCH_LIVE    0x1
+#define SWITCH_FALSE   0x2
+#define SWITCH_IGNORE  0x4
+
+struct switchstr
+{
+  const char *part1;
+  const char **args;
+  unsigned int live_cond;
+  unsigned char validated;
+  unsigned char ordering;
+};
+
+static struct switchstr *switches;
+
+static int n_switches;
+
+/* Language is one of three things:
+
+   1) The name of a real programming language.
+   2) NULL, indicating that no one has figured out
+   what it is yet.
+   3) '*', indicating that the file should be passed
+   to the linker.  */
+struct infile
+{
+  const char *name;
+  const char *language;
+  struct compiler *incompiler;
+  bool compiled;
+  bool preprocessed;
+};
+
+/* Also a vector of input files specified.  */
+
+static struct infile *infiles;
+
+int n_infiles;
+
+/* True if multiple input files are being compiled to a single
+   assembly file.  */
+
+static bool combine_inputs;
+
+/* This counts the number of libraries added by lang_specific_driver, so that
+   we can tell if there were any user supplied any files or libraries.  */
+
+static int added_libraries;
+
+/* And a vector of corresponding output files is made up later.  */
+
+const char **outfiles;
+
+#if defined(HAVE_TARGET_OBJECT_SUFFIX) || defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
+
+/* Convert NAME to a new name if it is the standard suffix.  DO_EXE
+   is true if we should look for an executable suffix.  DO_OBJ
+   is true if we should look for an object suffix.  */
+
+static const char *
+convert_filename (const char *name, int do_exe ATTRIBUTE_UNUSED,
+		  int do_obj ATTRIBUTE_UNUSED)
+{
+#if defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
+  int i;
+#endif
+  int len;
+
+  if (name == NULL)
+    return NULL;
+
+  len = strlen (name);
+
+#ifdef HAVE_TARGET_OBJECT_SUFFIX
+  /* Convert x.o to x.obj if TARGET_OBJECT_SUFFIX is ".obj".  */
+  if (do_obj && len > 2
+      && name[len - 2] == '.'
+      && name[len - 1] == 'o')
+    {
+      obstack_grow (&obstack, name, len - 2);
+      obstack_grow0 (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX));
+      name = XOBFINISH (&obstack, const char *);
+    }
+#endif
+
+#if defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
+  /* If there is no filetype, make it the executable suffix (which includes
+     the ".").  But don't get confused if we have just "-o".  */
+  if (! do_exe || TARGET_EXECUTABLE_SUFFIX[0] == 0 || (len == 2 && name[0] == '-'))
+    return name;
+
+  for (i = len - 1; i >= 0; i--)
+    if (IS_DIR_SEPARATOR (name[i]))
+      break;
+
+  for (i++; i < len; i++)
+    if (name[i] == '.')
+      return name;
+
+  obstack_grow (&obstack, name, len);
+  obstack_grow0 (&obstack, TARGET_EXECUTABLE_SUFFIX,
+		 strlen (TARGET_EXECUTABLE_SUFFIX));
+  name = XOBFINISH (&obstack, const char *);
+#endif
+
+  return name;
+}
+#endif
+
+/* Display the command line switches accepted by gcc.  */
+static void
+display_help (void)
+{
+  printf (_("Usage: %s [options] file...\n"), programname);
+  fputs (_("Options:\n"), stdout);
+
+  fputs (_("  -pass-exit-codes         Exit with highest error code from a phase\n"), stdout);
+  fputs (_("  --help                   Display this information\n"), stdout);
+  fputs (_("  --target-help            Display target specific command line options\n"), stdout);
+  fputs (_("  --help={target|optimizers|warnings|params|[^]{joined|separate|undocumented}}[,...]\n"), stdout);
+  fputs (_("                           Display specific types of command line options\n"), stdout);
+  if (! verbose_flag)
+    fputs (_("  (Use '-v --help' to display command line options of sub-processes)\n"), stdout);
+  fputs (_("  --version                Display compiler version information\n"), stdout);
+  fputs (_("  -dumpspecs               Display all of the built in spec strings\n"), stdout);
+  fputs (_("  -dumpversion             Display the version of the compiler\n"), stdout);
+  fputs (_("  -dumpmachine             Display the compiler's target processor\n"), stdout);
+  fputs (_("  -print-search-dirs       Display the directories in the compiler's search path\n"), stdout);
+  fputs (_("  -print-libgcc-file-name  Display the name of the compiler's companion library\n"), stdout);
+  fputs (_("  -print-file-name=<lib>   Display the full path to library <lib>\n"), stdout);
+  fputs (_("  -print-prog-name=<prog>  Display the full path to compiler component <prog>\n"), stdout);
+  fputs (_("  -print-multi-directory   Display the root directory for versions of libgcc\n"), stdout);
+  fputs (_("\
+  -print-multi-lib         Display the mapping between command line options and\n\
+                           multiple library search directories\n"), stdout);
+  fputs (_("  -print-multi-os-directory Display the relative path to OS libraries\n"), stdout);
+  fputs (_("  -print-sysroot           Display the target libraries directory\n"), stdout);
+  fputs (_("  -print-sysroot-headers-suffix Display the sysroot suffix used to find headers\n"), stdout);
+  fputs (_("  -Wa,<options>            Pass comma-separated <options> on to the assembler\n"), stdout);
+  fputs (_("  -Wp,<options>            Pass comma-separated <options> on to the preprocessor\n"), stdout);
+  fputs (_("  -Wl,<options>            Pass comma-separated <options> on to the linker\n"), stdout);
+  fputs (_("  -Xassembler <arg>        Pass <arg> on to the assembler\n"), stdout);
+  fputs (_("  -Xpreprocessor <arg>     Pass <arg> on to the preprocessor\n"), stdout);
+  fputs (_("  -Xlinker <arg>           Pass <arg> on to the linker\n"), stdout);
+  fputs (_("  -combine                 Pass multiple source files to compiler at once\n"), stdout);
+  fputs (_("  -save-temps              Do not delete intermediate files\n"), stdout);
+  fputs (_("  -pipe                    Use pipes rather than intermediate files\n"), stdout);
+  fputs (_("  -time                    Time the execution of each subprocess\n"), stdout);
+  fputs (_("  -specs=<file>            Override built-in specs with the contents of <file>\n"), stdout);
+  fputs (_("  -std=<standard>          Assume that the input sources are for <standard>\n"), stdout);
+  fputs (_("\
+  --sysroot=<directory>    Use <directory> as the root directory for headers\n\
+                           and libraries\n"), stdout);
+  fputs (_("  -B <directory>           Add <directory> to the compiler's search paths\n"), stdout);
+  fputs (_("  -b <machine>             Run gcc for target <machine>, if installed\n"), stdout);
+  fputs (_("  -V <version>             Run gcc version number <version>, if installed\n"), stdout);
+  fputs (_("  -v                       Display the programs invoked by the compiler\n"), stdout);
+  fputs (_("  -###                     Like -v but options quoted and commands not executed\n"), stdout);
+  fputs (_("  -E                       Preprocess only; do not compile, assemble or link\n"), stdout);
+  fputs (_("  -S                       Compile only; do not assemble or link\n"), stdout);
+  fputs (_("  -c                       Compile and assemble, but do not link\n"), stdout);
+  fputs (_("  -o <file>                Place the output into <file>\n"), stdout);
+  fputs (_("\
+  -x <language>            Specify the language of the following input files\n\
+                           Permissible languages include: c c++ assembler none\n\
+                           'none' means revert to the default behavior of\n\
+                           guessing the language based on the file's extension\n\
+"), stdout);
+
+  printf (_("\
+\nOptions starting with -g, -f, -m, -O, -W, or --param are automatically\n\
+ passed on to the various sub-processes invoked by %s.  In order to pass\n\
+ other options on to these processes the -W<letter> options must be used.\n\
+"), programname);
+
+  /* The rest of the options are displayed by invocations of the various
+     sub-processes.  */
+}
+
+static void
+add_preprocessor_option (const char *option, int len)
+{
+  n_preprocessor_options++;
+
+  if (! preprocessor_options)
+    preprocessor_options = XNEWVEC (char *, n_preprocessor_options);
+  else
+    preprocessor_options = XRESIZEVEC (char *, preprocessor_options,
+				       n_preprocessor_options);
+
+  preprocessor_options [n_preprocessor_options - 1] =
+    save_string (option, len);
+}
+
+static void
+add_assembler_option (const char *option, int len)
+{
+  n_assembler_options++;
+
+  if (! assembler_options)
+    assembler_options = XNEWVEC (char *, n_assembler_options);
+  else
+    assembler_options = XRESIZEVEC (char *, assembler_options,
+				    n_assembler_options);
+
+  assembler_options [n_assembler_options - 1] = save_string (option, len);
+}
+
+static void
+add_linker_option (const char *option, int len)
+{
+  n_linker_options++;
+
+  if (! linker_options)
+    linker_options = XNEWVEC (char *, n_linker_options);
+  else
+    linker_options = XRESIZEVEC (char *, linker_options, n_linker_options);  
+
+  linker_options [n_linker_options - 1] = save_string (option, len);
+}
+
+/* Create the vector `switches' and its contents.
+   Store its length in `n_switches'.  */
+
+static void
+process_command (int argc, const char **argv)
+{
+  int i;
+  const char *temp;
+  char *temp1;
+  const char *spec_lang = 0;
+  int last_language_n_infiles;
+  int lang_n_infiles = 0;
+#ifdef MODIFY_TARGET_NAME
+  int is_modify_target_name;
+  unsigned int j;
+#endif
+  const char *tooldir_prefix;
+
+  GET_ENVIRONMENT (gcc_exec_prefix, "GCC_EXEC_PREFIX");
+
+  n_switches = 0;
+  n_infiles = 0;
+  added_libraries = 0;
+
+  /* Figure compiler version from version string.  */
+
+  compiler_version = temp1 = xstrdup (version_string);
+
+  for (; *temp1; ++temp1)
+    {
+      if (*temp1 == ' ')
+	{
+	  *temp1 = '\0';
+	  break;
+	}
+    }
+
+  /* If there is a -V or -b option (or both), process it now, before
+     trying to interpret the rest of the command line.
+     Use heuristic that all configuration names must have at least
+     one dash '-'. This allows us to pass options starting with -b.  */
+  if (argc > 1 && argv[1][0] == '-'
+      && (argv[1][1] == 'V'
+	  || (argv[1][1] == 'b'
+	      && (argv[1][2] == '\0'
+		  || NULL != strchr (argv[1] + 2, '-')))))
+    {
+      const char *new_version = DEFAULT_TARGET_VERSION;
+      const char *new_machine = DEFAULT_TARGET_MACHINE;
+      const char *progname = argv[0];
+      char **new_argv;
+      char *new_argv0;
+      int baselen;
+      int status = 0;
+      int err = 0;
+      const char *errmsg;
+
+      while (argc > 1 && argv[1][0] == '-'
+	     && (argv[1][1] == 'V'
+		 || (argv[1][1] == 'b'
+		     && (argv[1][2] == '\0'
+			 || NULL != strchr (argv[1] + 2, '-')))))
+	{
+	  char opt = argv[1][1];
+	  const char *arg;
+	  if (argv[1][2] != '\0')
+	    {
+	      arg = argv[1] + 2;
+	      argc -= 1;
+	      argv += 1;
+	    }
+	  else if (argc > 2)
+	    {
+	      arg = argv[2];
+	      argc -= 2;
+	      argv += 2;
+	    }
+	  else
+	    fatal ("'-%c' option must have argument", opt);
+	  if (opt == 'V')
+	    new_version = arg;
+	  else
+	    new_machine = arg;
+	}
+
+      for (baselen = strlen (progname); baselen > 0; baselen--)
+	if (IS_DIR_SEPARATOR (progname[baselen-1]))
+	  break;
+      new_argv0 = XDUPVAR (char, progname, baselen,
+			   baselen + concat_length (new_version, new_machine,
+						    "-gcc-", NULL) + 1);
+      strcpy (new_argv0 + baselen, new_machine);
+      strcat (new_argv0, "-gcc-");
+      strcat (new_argv0, new_version);
+
+      new_argv = XDUPVEC (char *, argv, argc + 1);
+      new_argv[0] = new_argv0;
+
+      errmsg = pex_one (PEX_SEARCH, new_argv0, new_argv, progname, NULL,
+			NULL, &status, &err);
+
+      if (errmsg)
+	{
+	  if (err == 0)
+	    fatal ("couldn't run '%s': %s", new_argv0, errmsg);
+	  else
+	    fatal ("couldn't run '%s': %s: %s", new_argv0, errmsg,
+		    xstrerror (err));
+        }
+      exit (status);
+    }
+
+  /* Set up the default search paths.  If there is no GCC_EXEC_PREFIX,
+     see if we can create it from the pathname specified in argv[0].  */
+
+  gcc_libexec_prefix = standard_libexec_prefix;
+#ifndef VMS
+  /* FIXME: make_relative_prefix doesn't yet work for VMS.  */
+  if (!gcc_exec_prefix)
+    {
+      gcc_exec_prefix = make_relative_prefix (argv[0], standard_bindir_prefix,
+					      standard_exec_prefix);
+      gcc_libexec_prefix = make_relative_prefix (argv[0],
+						 standard_bindir_prefix,
+						 standard_libexec_prefix);
+      if (gcc_exec_prefix)
+	xputenv (concat ("GCC_EXEC_PREFIX=", gcc_exec_prefix, NULL));
+    }
+  else
+    {
+      /* make_relative_prefix requires a program name, but
+	 GCC_EXEC_PREFIX is typically a directory name with a trailing
+	 / (which is ignored by make_relative_prefix), so append a
+	 program name.  */
+      char *tmp_prefix = concat (gcc_exec_prefix, "gcc", NULL);
+      gcc_libexec_prefix = make_relative_prefix (tmp_prefix,
+						 standard_exec_prefix,
+						 standard_libexec_prefix);
+
+      /* The path is unrelocated, so fallback to the original setting.  */
+      if (!gcc_libexec_prefix)
+	gcc_libexec_prefix = standard_libexec_prefix;
+
+      free (tmp_prefix);
+    }
+#else
+#endif
+  /* From this point onward, gcc_exec_prefix is non-null if the toolchain
+     is relocated. The toolchain was either relocated using GCC_EXEC_PREFIX
+     or an automatically created GCC_EXEC_PREFIX from argv[0].  */
+
+  if (gcc_exec_prefix)
+    {
+      int len = strlen (gcc_exec_prefix);
+
+      if (len > (int) sizeof ("/lib/gcc/") - 1
+	  && (IS_DIR_SEPARATOR (gcc_exec_prefix[len-1])))
+	{
+	  temp = gcc_exec_prefix + len - sizeof ("/lib/gcc/") + 1;
+	  if (IS_DIR_SEPARATOR (*temp)
+	      && strncmp (temp + 1, "lib", 3) == 0
+	      && IS_DIR_SEPARATOR (temp[4])
+	      && strncmp (temp + 5, "gcc", 3) == 0)
+	    len -= sizeof ("/lib/gcc/") - 1;
+	}
+
+      set_std_prefix (gcc_exec_prefix, len);
+      add_prefix (&exec_prefixes, gcc_libexec_prefix, "GCC",
+		  PREFIX_PRIORITY_LAST, 0, 0);
+      add_prefix (&startfile_prefixes, gcc_exec_prefix, "GCC",
+		  PREFIX_PRIORITY_LAST, 0, 0);
+    }
+
+  /* COMPILER_PATH and LIBRARY_PATH have values
+     that are lists of directory names with colons.  */
+
+  GET_ENVIRONMENT (temp, "COMPILER_PATH");
+  if (temp)
+    {
+      const char *startp, *endp;
+      char *nstore = (char *) alloca (strlen (temp) + 3);
+
+      startp = endp = temp;
+      while (1)
+	{
+	  if (*endp == PATH_SEPARATOR || *endp == 0)
+	    {
+	      strncpy (nstore, startp, endp - startp);
+	      if (endp == startp)
+		strcpy (nstore, concat (".", dir_separator_str, NULL));
+	      else if (!IS_DIR_SEPARATOR (endp[-1]))
+		{
+		  nstore[endp - startp] = DIR_SEPARATOR;
+		  nstore[endp - startp + 1] = 0;
+		}
+	      else
+		nstore[endp - startp] = 0;
+	      add_prefix (&exec_prefixes, nstore, 0,
+			  PREFIX_PRIORITY_LAST, 0, 0);
+	      add_prefix (&include_prefixes, nstore, 0,
+			  PREFIX_PRIORITY_LAST, 0, 0);
+	      if (*endp == 0)
+		break;
+	      endp = startp = endp + 1;
+	    }
+	  else
+	    endp++;
+	}
+    }
+
+  GET_ENVIRONMENT (temp, LIBRARY_PATH_ENV);
+  if (temp && *cross_compile == '0')
+    {
+      const char *startp, *endp;
+      char *nstore = (char *) alloca (strlen (temp) + 3);
+
+      startp = endp = temp;
+      while (1)
+	{
+	  if (*endp == PATH_SEPARATOR || *endp == 0)
+	    {
+	      strncpy (nstore, startp, endp - startp);
+	      if (endp == startp)
+		strcpy (nstore, concat (".", dir_separator_str, NULL));
+	      else if (!IS_DIR_SEPARATOR (endp[-1]))
+		{
+		  nstore[endp - startp] = DIR_SEPARATOR;
+		  nstore[endp - startp + 1] = 0;
+		}
+	      else
+		nstore[endp - startp] = 0;
+	      add_prefix (&startfile_prefixes, nstore, NULL,
+			  PREFIX_PRIORITY_LAST, 0, 1);
+	      if (*endp == 0)
+		break;
+	      endp = startp = endp + 1;
+	    }
+	  else
+	    endp++;
+	}
+    }
+
+  /* Use LPATH like LIBRARY_PATH (for the CMU build program).  */
+  GET_ENVIRONMENT (temp, "LPATH");
+  if (temp && *cross_compile == '0')
+    {
+      const char *startp, *endp;
+      char *nstore = (char *) alloca (strlen (temp) + 3);
+
+      startp = endp = temp;
+      while (1)
+	{
+	  if (*endp == PATH_SEPARATOR || *endp == 0)
+	    {
+	      strncpy (nstore, startp, endp - startp);
+	      if (endp == startp)
+		strcpy (nstore, concat (".", dir_separator_str, NULL));
+	      else if (!IS_DIR_SEPARATOR (endp[-1]))
+		{
+		  nstore[endp - startp] = DIR_SEPARATOR;
+		  nstore[endp - startp + 1] = 0;
+		}
+	      else
+		nstore[endp - startp] = 0;
+	      add_prefix (&startfile_prefixes, nstore, NULL,
+			  PREFIX_PRIORITY_LAST, 0, 1);
+	      if (*endp == 0)
+		break;
+	      endp = startp = endp + 1;
+	    }
+	  else
+	    endp++;
+	}
+    }
+
+  /* Convert new-style -- options to old-style.  */
+  translate_options (&argc, (const char *const **) &argv);
+
+  /* Do language-specific adjustment/addition of flags.  */
+  lang_specific_driver (&argc, (const char *const **) &argv, &added_libraries);
+
+  /* Scan argv twice.  Here, the first time, just count how many switches
+     there will be in their vector, and how many input files in theirs.
+     Here we also parse the switches that cc itself uses (e.g. -v).  */
+
+  for (i = 1; i < argc; i++)
+    {
+      if (! strcmp (argv[i], "-dumpspecs"))
+	{
+	  struct spec_list *sl;
+	  init_spec ();
+	  for (sl = specs; sl; sl = sl->next)
+	    printf ("*%s:\n%s\n\n", sl->name, *(sl->ptr_spec));
+	  if (link_command_spec)
+	    printf ("*link_command:\n%s\n\n", link_command_spec);
+	  exit (0);
+	}
+      else if (! strcmp (argv[i], "-dumpversion"))
+	{
+	  printf ("%s\n", spec_version);
+	  exit (0);
+	}
+      else if (! strcmp (argv[i], "-dumpmachine"))
+	{
+	  printf ("%s\n", spec_machine);
+	  exit (0);
+	}
+      else if (strcmp (argv[i], "-fversion") == 0)
+	{
+	  /* translate_options () has turned --version into -fversion.  */
+	  printf (_("%s %s%s\n"), programname, pkgversion_string,
+		  version_string);
+	  printf ("Copyright %s 2009 Free Software Foundation, Inc.\n",
+		  _("(C)"));
+	  fputs (_("This is free software; see the source for copying conditions.  There is NO\n\
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"),
+		 stdout);
+	  exit (0);
+	}
+      else if (strcmp (argv[i], "-fhelp") == 0)
+	{
+	  /* translate_options () has turned --help into -fhelp.  */
+	  print_help_list = 1;
+
+	  /* We will be passing a dummy file on to the sub-processes.  */
+	  n_infiles++;
+	  n_switches++;
+
+	  /* CPP driver cannot obtain switch from cc1_options.  */
+	  if (is_cpp_driver)
+	    add_preprocessor_option ("--help", 6);
+	  add_assembler_option ("--help", 6);
+	  add_linker_option ("--help", 6);
+	}
+      else if (strncmp (argv[i], "-fhelp=", 7) == 0)
+	{
+	  /* translate_options () has turned --help into -fhelp.  */
+	  print_subprocess_help = 2;
+
+	  /* We will be passing a dummy file on to the sub-processes.  */
+	  n_infiles++;
+	  n_switches++;
+	}
+      else if (strcmp (argv[i], "-ftarget-help") == 0)
+	{
+	  /* translate_options() has turned --target-help into -ftarget-help.  */
+	  print_subprocess_help = 1;
+
+	  /* We will be passing a dummy file on to the sub-processes.  */
+	  n_infiles++;
+	  n_switches++;
+
+	  /* CPP driver cannot obtain switch from cc1_options.  */
+	  if (is_cpp_driver)
+	    add_preprocessor_option ("--target-help", 13);
+	  add_assembler_option ("--target-help", 13);
+	  add_linker_option ("--target-help", 13);
+	}
+      else if (! strcmp (argv[i], "-pass-exit-codes"))
+	{
+	  pass_exit_codes = 1;
+	  n_switches++;
+	}
+      else if (! strcmp (argv[i], "-print-search-dirs"))
+	print_search_dirs = 1;
+      else if (! strcmp (argv[i], "-print-libgcc-file-name"))
+	print_file_name = "libgcc.a";
+      else if (! strncmp (argv[i], "-print-file-name=", 17))
+	print_file_name = argv[i] + 17;
+      else if (! strncmp (argv[i], "-print-prog-name=", 17))
+	print_prog_name = argv[i] + 17;
+      else if (! strcmp (argv[i], "-print-multi-lib"))
+	print_multi_lib = 1;
+      else if (! strcmp (argv[i], "-print-multi-directory"))
+	print_multi_directory = 1;
+      else if (! strcmp (argv[i], "-print-sysroot"))
+	print_sysroot = 1;
+      else if (! strcmp (argv[i], "-print-multi-os-directory"))
+	print_multi_os_directory = 1;
+      else if (! strcmp (argv[i], "-print-sysroot-headers-suffix"))
+	print_sysroot_headers_suffix = 1;
+      else if (! strncmp (argv[i], "-Wa,", 4))
+	{
+	  int prev, j;
+	  /* Pass the rest of this option to the assembler.  */
+
+	  /* Split the argument at commas.  */
+	  prev = 4;
+	  for (j = 4; argv[i][j]; j++)
+	    if (argv[i][j] == ',')
+	      {
+		add_assembler_option (argv[i] + prev, j - prev);
+		prev = j + 1;
+	      }
+
+	  /* Record the part after the last comma.  */
+	  add_assembler_option (argv[i] + prev, j - prev);
+	}
+      else if (! strncmp (argv[i], "-Wp,", 4))
+	{
+	  int prev, j;
+	  /* Pass the rest of this option to the preprocessor.  */
+
+	  /* Split the argument at commas.  */
+	  prev = 4;
+	  for (j = 4; argv[i][j]; j++)
+	    if (argv[i][j] == ',')
+	      {
+		add_preprocessor_option (argv[i] + prev, j - prev);
+		prev = j + 1;
+	      }
+
+	  /* Record the part after the last comma.  */
+	  add_preprocessor_option (argv[i] + prev, j - prev);
+	}
+      else if (argv[i][0] == '+' && argv[i][1] == 'e')
+	/* The +e options to the C++ front-end.  */
+	n_switches++;
+      else if (strncmp (argv[i], "-Wl,", 4) == 0)
+	{
+	  int j;
+	  /* Split the argument at commas.  */
+	  for (j = 3; argv[i][j]; j++)
+	    n_infiles += (argv[i][j] == ',');
+	}
+      else if (strcmp (argv[i], "-Xlinker") == 0)
+	{
+	  if (i + 1 == argc)
+	    fatal ("argument to '-Xlinker' is missing");
+
+	  n_infiles++;
+	  i++;
+	}
+      else if (strcmp (argv[i], "-Xpreprocessor") == 0)
+	{
+	  if (i + 1 == argc)
+	    fatal ("argument to '-Xpreprocessor' is missing");
+
+	  add_preprocessor_option (argv[i+1], strlen (argv[i+1]));
+	}
+      else if (strcmp (argv[i], "-Xassembler") == 0)
+	{
+	  if (i + 1 == argc)
+	    fatal ("argument to '-Xassembler' is missing");
+
+	  add_assembler_option (argv[i+1], strlen (argv[i+1]));
+	}
+      else if (strcmp (argv[i], "-l") == 0)
+	{
+	  if (i + 1 == argc)
+	    fatal ("argument to '-l' is missing");
+
+	  n_infiles++;
+	  i++;
+	}
+      else if (strncmp (argv[i], "-l", 2) == 0)
+	n_infiles++;
+      else if (strcmp (argv[i], "-save-temps") == 0)
+	{
+	  save_temps_flag = 1;
+	  n_switches++;
+	}
+      else if (strcmp (argv[i], "-combine") == 0)
+	{
+	  combine_flag = 1;
+	  n_switches++;
+	}
+      else if (strcmp (argv[i], "-specs") == 0)
+	{
+	  struct user_specs *user = XNEW (struct user_specs);
+	  if (++i >= argc)
+	    fatal ("argument to '-specs' is missing");
+
+	  user->next = (struct user_specs *) 0;
+	  user->filename = argv[i];
+	  if (user_specs_tail)
+	    user_specs_tail->next = user;
+	  else
+	    user_specs_head = user;
+	  user_specs_tail = user;
+	}
+      else if (strncmp (argv[i], "-specs=", 7) == 0)
+	{
+	  struct user_specs *user = XNEW (struct user_specs);
+	  if (strlen (argv[i]) == 7)
+	    fatal ("argument to '-specs=' is missing");
+
+	  user->next = (struct user_specs *) 0;
+	  user->filename = argv[i] + 7;
+	  if (user_specs_tail)
+	    user_specs_tail->next = user;
+	  else
+	    user_specs_head = user;
+	  user_specs_tail = user;
+	}
+      else if (strcmp (argv[i], "-time") == 0)
+	report_times = 1;
+      else if (strcmp (argv[i], "-pipe") == 0)
+	{
+	  /* -pipe has to go into the switches array as well as
+	     setting a flag.  */
+	  use_pipes = 1;
+	  n_switches++;
+	}
+      else if (strcmp (argv[i], "-wrapper") == 0)
+        {
+	  if (++i >= argc)
+	    fatal ("argument to '-wrapper' is missing");
+
+          wrapper_string = argv[i];
+	  n_switches++;
+	  n_switches++;
+        }
+      else if (strcmp (argv[i], "-###") == 0)
+	{
+	  /* This is similar to -v except that there is no execution
+	     of the commands and the echoed arguments are quoted.  It
+	     is intended for use in shell scripts to capture the
+	     driver-generated command line.  */
+	  verbose_only_flag++;
+	  verbose_flag++;
+	}
+      else if (argv[i][0] == '-' && argv[i][1] != 0)
+	{
+	  const char *p = &argv[i][1];
+	  int c = *p;
+
+	  switch (c)
+	    {
+	    case 'b':
+	      if (p[1] && NULL == strchr (argv[i] + 2, '-'))
+		goto normal_switch;
+
+	      /* Fall through.  */
+	    case 'V':
+	      fatal ("'-%c' must come at the start of the command line", c);
+	      break;
+
+	    case 'B':
+	      {
+		const char *value;
+		int len;
+
+		if (p[1] == 0 && i + 1 == argc)
+		  fatal ("argument to '-B' is missing");
+		if (p[1] == 0)
+		  value = argv[++i];
+		else
+		  value = p + 1;
+
+		len = strlen (value);
+
+		/* Catch the case where the user has forgotten to append a
+		   directory separator to the path.  Note, they may be using
+		   -B to add an executable name prefix, eg "i386-elf-", in
+		   order to distinguish between multiple installations of
+		   GCC in the same directory.  Hence we must check to see
+		   if appending a directory separator actually makes a
+		   valid directory name.  */
+		if (! IS_DIR_SEPARATOR (value [len - 1])
+		    && is_directory (value, false))
+		  {
+		    char *tmp = XNEWVEC (char, len + 2);
+		    strcpy (tmp, value);
+		    tmp[len] = DIR_SEPARATOR;
+		    tmp[++ len] = 0;
+		    value = tmp;
+		  }
+
+		add_prefix (&exec_prefixes, value, NULL,
+			    PREFIX_PRIORITY_B_OPT, 0, 0);
+		add_prefix (&startfile_prefixes, value, NULL,
+			    PREFIX_PRIORITY_B_OPT, 0, 0);
+		add_prefix (&include_prefixes, value, NULL,
+			    PREFIX_PRIORITY_B_OPT, 0, 0);
+		n_switches++;
+	      }
+	      break;
+
+	    case 'v':	/* Print our subcommands and print versions.  */
+	      n_switches++;
+	      /* If they do anything other than exactly `-v', don't set
+		 verbose_flag; rather, continue on to give the error.  */
+	      if (p[1] != 0)
+		break;
+	      verbose_flag++;
+	      break;
+
+	    case 'S':
+	    case 'c':
+	      if (p[1] == 0)
+		{
+		  have_c = 1;
+		  n_switches++;
+		  break;
+		}
+	      goto normal_switch;
+
+	    case 'o':
+	      have_o = 1;
+#if defined(HAVE_TARGET_EXECUTABLE_SUFFIX)
+	      if (! have_c)
+		{
+		  int skip;
+
+		  /* Forward scan, just in case -S or -c is specified
+		     after -o.  */
+		  int j = i + 1;
+		  if (p[1] == 0)
+		    ++j;
+		  while (j < argc)
+		    {
+		      if (argv[j][0] == '-')
+			{
+			  if (SWITCH_CURTAILS_COMPILATION (argv[j][1])
+			      && argv[j][2] == 0)
+			    {
+			      have_c = 1;
+			      break;
+			    }
+			  else if ((skip = SWITCH_TAKES_ARG (argv[j][1])))
+			    j += skip - (argv[j][2] != 0);
+			  else if ((skip = WORD_SWITCH_TAKES_ARG (argv[j] + 1)))
+			    j += skip;
+			}
+		      j++;
+		    }
+		}
+#endif
+#if defined(HAVE_TARGET_EXECUTABLE_SUFFIX) || defined(HAVE_TARGET_OBJECT_SUFFIX)
+	      if (p[1] == 0)
+		argv[i + 1] = convert_filename (argv[i + 1], ! have_c, 0);
+	      else
+		argv[i] = convert_filename (argv[i], ! have_c, 0);
+#endif
+	      goto normal_switch;
+
+	    default:
+	    normal_switch:
+
+#ifdef MODIFY_TARGET_NAME
+	      is_modify_target_name = 0;
+
+	      for (j = 0; j < ARRAY_SIZE (modify_target); j++)
+		if (! strcmp (argv[i], modify_target[j].sw))
+		  {
+		    char *new_name = XNEWVEC (char, strlen (modify_target[j].str)
+					      + strlen (spec_machine));
+		    const char *p, *r;
+		    char *q;
+		    int made_addition = 0;
+
+		    is_modify_target_name = 1;
+		    for (p = spec_machine, q = new_name; *p != 0; )
+		      {
+			if (modify_target[j].add_del == DELETE
+			    && (! strncmp (q, modify_target[j].str,
+					   strlen (modify_target[j].str))))
+			  p += strlen (modify_target[j].str);
+			else if (modify_target[j].add_del == ADD
+				 && ! made_addition && *p == '-')
+			  {
+			    for (r = modify_target[j].str; *r != 0; )
+			      *q++ = *r++;
+			    made_addition = 1;
+			  }
+
+			*q++ = *p++;
+		      }
+
+		    spec_machine = new_name;
+		  }
+
+	      if (is_modify_target_name)
+		break;
+#endif
+
+	      n_switches++;
+
+	      if (SWITCH_TAKES_ARG (c) > (p[1] != 0))
+		i += SWITCH_TAKES_ARG (c) - (p[1] != 0);
+	      else if (WORD_SWITCH_TAKES_ARG (p))
+		i += WORD_SWITCH_TAKES_ARG (p);
+	    }
+	}
+      else
+	{
+	  n_infiles++;
+	  lang_n_infiles++;
+	}
+    }
+
+  if (save_temps_flag && use_pipes)
+    {
+      /* -save-temps overrides -pipe, so that temp files are produced */
+      if (save_temps_flag)
+	error ("warning: -pipe ignored because -save-temps specified");
+      use_pipes = 0;
+    }
+
+  /* Set up the search paths.  We add directories that we expect to
+     contain GNU Toolchain components before directories specified by
+     the machine description so that we will find GNU components (like
+     the GNU assembler) before those of the host system.  */ 
+
+  /* If we don't know where the toolchain has been installed, use the
+     configured-in locations.  */
+  if (!gcc_exec_prefix)
+    {
+#ifndef OS2
+      add_prefix (&exec_prefixes, standard_libexec_prefix, "GCC",
+		  PREFIX_PRIORITY_LAST, 1, 0);
+      add_prefix (&exec_prefixes, standard_libexec_prefix, "BINUTILS",
+		  PREFIX_PRIORITY_LAST, 2, 0);
+      add_prefix (&exec_prefixes, standard_exec_prefix, "BINUTILS",
+		  PREFIX_PRIORITY_LAST, 2, 0);
+#endif
+      add_prefix (&startfile_prefixes, standard_exec_prefix, "BINUTILS",
+		  PREFIX_PRIORITY_LAST, 1, 0);
+    }
+
+  /* If not cross-compiling, search well-known system locations.  */
+  if (*cross_compile == '0')
+    {
+#ifndef OS2
+      add_prefix (&exec_prefixes, standard_exec_prefix_1, "BINUTILS",
+		  PREFIX_PRIORITY_LAST, 2, 0);
+      add_prefix (&exec_prefixes, standard_exec_prefix_2, "BINUTILS",
+		  PREFIX_PRIORITY_LAST, 2, 0);
+#endif
+      add_prefix (&startfile_prefixes, standard_exec_prefix_2, "BINUTILS",
+		  PREFIX_PRIORITY_LAST, 1, 0);
+    }
+
+  gcc_assert (!IS_ABSOLUTE_PATH (tooldir_base_prefix));
+  tooldir_prefix = concat (tooldir_base_prefix, spec_machine,
+			   dir_separator_str, NULL);
+
+  /* Look for tools relative to the location from which the driver is
+     running, or, if that is not available, the configured prefix.  */
+  tooldir_prefix
+    = concat (gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix,
+	      spec_machine, dir_separator_str,
+	      spec_version, dir_separator_str, tooldir_prefix, NULL);
+
+  add_prefix (&exec_prefixes,
+	      concat (tooldir_prefix, "bin", dir_separator_str, NULL),
+	      "BINUTILS", PREFIX_PRIORITY_LAST, 0, 0);
+  add_prefix (&startfile_prefixes,
+	      concat (tooldir_prefix, "lib", dir_separator_str, NULL),
+	      "BINUTILS", PREFIX_PRIORITY_LAST, 0, 1);
+
+#if defined(TARGET_SYSTEM_ROOT_RELOCATABLE) && !defined(VMS)
+  /* If the normal TARGET_SYSTEM_ROOT is inside of $exec_prefix,
+     then consider it to relocate with the rest of the GCC installation
+     if GCC_EXEC_PREFIX is set.
+     ``make_relative_prefix'' is not compiled for VMS, so don't call it.  */
+  if (target_system_root && gcc_exec_prefix)
+    {
+      char *tmp_prefix = make_relative_prefix (argv[0],
+					       standard_bindir_prefix,
+					       target_system_root);
+      if (tmp_prefix && access_check (tmp_prefix, F_OK) == 0)
+	{
+	  target_system_root = tmp_prefix;
+	  target_system_root_changed = 1;
+	}
+    }
+#endif
+
+  /* More prefixes are enabled in main, after we read the specs file
+     and determine whether this is cross-compilation or not.  */
+
+  /* Then create the space for the vectors and scan again.  */
+
+  switches = XNEWVEC (struct switchstr, n_switches + 1);
+  infiles = XNEWVEC (struct infile, n_infiles + 1);
+  n_switches = 0;
+  n_infiles = 0;
+  last_language_n_infiles = -1;
+
+  /* This, time, copy the text of each switch and store a pointer
+     to the copy in the vector of switches.
+     Store all the infiles in their vector.  */
+
+  for (i = 1; i < argc; i++)
+    {
+      /* Just skip the switches that were handled by the preceding loop.  */
+#ifdef MODIFY_TARGET_NAME
+      is_modify_target_name = 0;
+
+      for (j = 0; j < ARRAY_SIZE (modify_target); j++)
+	if (! strcmp (argv[i], modify_target[j].sw))
+	  is_modify_target_name = 1;
+
+      if (is_modify_target_name)
+	;
+      else
+#endif
+      if (! strncmp (argv[i], "-Wa,", 4))
+	;
+      else if (! strncmp (argv[i], "-Wp,", 4))
+	;
+      else if (! strcmp (argv[i], "-pass-exit-codes"))
+	;
+      else if (! strcmp (argv[i], "-print-search-dirs"))
+	;
+      else if (! strcmp (argv[i], "-print-libgcc-file-name"))
+	;
+      else if (! strncmp (argv[i], "-print-file-name=", 17))
+	;
+      else if (! strncmp (argv[i], "-print-prog-name=", 17))
+	;
+      else if (! strcmp (argv[i], "-print-multi-lib"))
+	;
+      else if (! strcmp (argv[i], "-print-multi-directory"))
+	;
+      else if (! strcmp (argv[i], "-print-sysroot"))
+	;
+      else if (! strcmp (argv[i], "-print-multi-os-directory"))
+	;
+      else if (! strcmp (argv[i], "-print-sysroot-headers-suffix"))
+	;
+      else if (! strncmp (argv[i], "--sysroot=", strlen ("--sysroot=")))
+	{
+	  target_system_root = argv[i] + strlen ("--sysroot=");
+	  target_system_root_changed = 1;
+	}
+      else if (argv[i][0] == '+' && argv[i][1] == 'e')
+	{
+	  /* Compensate for the +e options to the C++ front-end;
+	     they're there simply for cfront call-compatibility.  We do
+	     some magic in default_compilers to pass them down properly.
+	     Note we deliberately start at the `+' here, to avoid passing
+	     -e0 or -e1 down into the linker.  */
+	  switches[n_switches].part1 = &argv[i][0];
+	  switches[n_switches].args = 0;
+	  switches[n_switches].live_cond = 0;
+	  switches[n_switches].validated = 0;
+	  n_switches++;
+	}
+      else if (strncmp (argv[i], "-Wl,", 4) == 0)
+	{
+	  int prev, j;
+	  /* Split the argument at commas.  */
+	  prev = 4;
+	  for (j = 4; argv[i][j]; j++)
+	    if (argv[i][j] == ',')
+	      {
+		infiles[n_infiles].language = "*";
+		infiles[n_infiles++].name
+		  = save_string (argv[i] + prev, j - prev);
+		prev = j + 1;
+	      }
+	  /* Record the part after the last comma.  */
+	  infiles[n_infiles].language = "*";
+	  infiles[n_infiles++].name = argv[i] + prev;
+	}
+      else if (strcmp (argv[i], "-Xlinker") == 0)
+	{
+	  infiles[n_infiles].language = "*";
+	  infiles[n_infiles++].name = argv[++i];
+	}
+      /* Xassembler and Xpreprocessor were already handled in the first argv
+	 scan, so all we need to do here is ignore them and their argument.  */
+      else if (strcmp (argv[i], "-Xassembler") == 0)
+	i++;
+      else if (strcmp (argv[i], "-Xpreprocessor") == 0)
+	i++;
+      else if (strcmp (argv[i], "-l") == 0)
+	{ /* POSIX allows separation of -l and the lib arg;
+	     canonicalize by concatenating -l with its arg */
+	  infiles[n_infiles].language = "*";
+	  infiles[n_infiles++].name = concat ("-l", argv[++i], NULL);
+	}
+      else if (strncmp (argv[i], "-l", 2) == 0)
+	{
+	  infiles[n_infiles].language = "*";
+	  infiles[n_infiles++].name = argv[i];
+	}
+      else if (strcmp (argv[i], "-wrapper") == 0)
+        i++;
+      else if (strcmp (argv[i], "-specs") == 0)
+	i++;
+      else if (strncmp (argv[i], "-specs=", 7) == 0)
+	;
+      else if (strcmp (argv[i], "-time") == 0)
+	;
+      else if (strcmp (argv[i], "-###") == 0)
+	;
+      else if (argv[i][0] == '-' && argv[i][1] != 0)
+	{
+	  const char *p = &argv[i][1];
+	  int c = *p;
+
+	  if (c == 'x')
+	    {
+	      if (p[1] == 0 && i + 1 == argc)
+		fatal ("argument to '-x' is missing");
+	      if (p[1] == 0)
+		spec_lang = argv[++i];
+	      else
+		spec_lang = p + 1;
+	      if (! strcmp (spec_lang, "none"))
+		/* Suppress the warning if -xnone comes after the last input
+		   file, because alternate command interfaces like g++ might
+		   find it useful to place -xnone after each input file.  */
+		spec_lang = 0;
+	      else
+		last_language_n_infiles = n_infiles;
+	      continue;
+	    }
+	  switches[n_switches].part1 = p;
+	  /* Deal with option arguments in separate argv elements.  */
+	  if ((SWITCH_TAKES_ARG (c) > (p[1] != 0))
+	      || WORD_SWITCH_TAKES_ARG (p))
+	    {
+	      int j = 0;
+	      int n_args = WORD_SWITCH_TAKES_ARG (p);
+
+	      if (n_args == 0)
+		{
+		  /* Count only the option arguments in separate argv elements.  */
+		  n_args = SWITCH_TAKES_ARG (c) - (p[1] != 0);
+		}
+	      if (i + n_args >= argc)
+		fatal ("argument to '-%s' is missing", p);
+	      switches[n_switches].args
+		= XNEWVEC (const char *, n_args + 1);
+	      while (j < n_args)
+		switches[n_switches].args[j++] = argv[++i];
+	      /* Null-terminate the vector.  */
+	      switches[n_switches].args[j] = 0;
+	    }
+	  else if (strchr (switches_need_spaces, c))
+	    {
+	      /* On some systems, ld cannot handle some options without
+		 a space.  So split the option from its argument.  */
+	      char *part1 = XNEWVEC (char, 2);
+	      part1[0] = c;
+	      part1[1] = '\0';
+
+	      switches[n_switches].part1 = part1;
+	      switches[n_switches].args = XNEWVEC (const char *, 2);
+	      switches[n_switches].args[0] = xstrdup (p+1);
+	      switches[n_switches].args[1] = 0;
+	    }
+	  else
+	    switches[n_switches].args = 0;
+
+	  switches[n_switches].live_cond = 0;
+	  switches[n_switches].validated = 0;
+	  switches[n_switches].ordering = 0;
+	  /* These are always valid, since gcc.c itself understands the
+	     first four and gfortranspec.c understands -static-libgfortran.  */
+	  if (!strcmp (p, "save-temps")
+	      || !strcmp (p, "static-libgcc")
+	      || !strcmp (p, "shared-libgcc")
+	      || !strcmp (p, "pipe")
+	      || !strcmp (p, "static-libgfortran"))
+	    switches[n_switches].validated = 1;
+	  else
+	    {
+	      char ch = switches[n_switches].part1[0];
+	      if (ch == 'B')
+		switches[n_switches].validated = 1;
+	    }
+	  n_switches++;
+	}
+      else
+	{
+#ifdef HAVE_TARGET_OBJECT_SUFFIX
+	  argv[i] = convert_filename (argv[i], 0, access (argv[i], F_OK));
+#endif
+
+	  if (strcmp (argv[i], "-") != 0 && access (argv[i], F_OK) < 0)
+	    {
+	      perror_with_name (argv[i]);
+	      error_count++;
+	    }
+	  else
+	    {
+	      infiles[n_infiles].language = spec_lang;
+	      infiles[n_infiles++].name = argv[i];
+	    }
+	}
+    }
+
+  if (n_infiles == last_language_n_infiles && spec_lang != 0)
+    error ("warning: '-x %s' after last input file has no effect", spec_lang);
+
+  /* Ensure we only invoke each subprocess once.  */
+  if (print_subprocess_help || print_help_list)
+    {
+      n_infiles = 1;
+
+      /* Create a dummy input file, so that we can pass
+	 the help option on to the various sub-processes.  */
+      infiles[0].language = "c";
+      infiles[0].name   = "help-dummy";
+    }
+
+  switches[n_switches].part1 = 0;
+  infiles[n_infiles].name = 0;
+}
+
+/* Store switches not filtered out by %<S in spec in COLLECT_GCC_OPTIONS
+   and place that in the environment.  */
+
+static void
+set_collect_gcc_options (void)
+{
+  int i;
+  int first_time;
+
+  /* Build COLLECT_GCC_OPTIONS to have all of the options specified to
+     the compiler.  */
+  obstack_grow (&collect_obstack, "COLLECT_GCC_OPTIONS=",
+		sizeof ("COLLECT_GCC_OPTIONS=") - 1);
+
+  first_time = TRUE;
+  for (i = 0; (int) i < n_switches; i++)
+    {
+      const char *const *args;
+      const char *p, *q;
+      if (!first_time)
+	obstack_grow (&collect_obstack, " ", 1);
+
+      first_time = FALSE;
+
+      /* Ignore elided switches.  */
+      if ((switches[i].live_cond & SWITCH_IGNORE) != 0)
+	continue;
+
+      obstack_grow (&collect_obstack, "'-", 2);
+      q = switches[i].part1;
+      while ((p = strchr (q, '\'')))
+	{
+	  obstack_grow (&collect_obstack, q, p - q);
+	  obstack_grow (&collect_obstack, "'\\''", 4);
+	  q = ++p;
+	}
+      obstack_grow (&collect_obstack, q, strlen (q));
+      obstack_grow (&collect_obstack, "'", 1);
+
+      for (args = switches[i].args; args && *args; args++)
+	{
+	  obstack_grow (&collect_obstack, " '", 2);
+	  q = *args;
+	  while ((p = strchr (q, '\'')))
+	    {
+	      obstack_grow (&collect_obstack, q, p - q);
+	      obstack_grow (&collect_obstack, "'\\''", 4);
+	      q = ++p;
+	    }
+	  obstack_grow (&collect_obstack, q, strlen (q));
+	  obstack_grow (&collect_obstack, "'", 1);
+	}
+    }
+  obstack_grow (&collect_obstack, "\0", 1);
+  xputenv (XOBFINISH (&collect_obstack, char *));
+}
+
+/* Process a spec string, accumulating and running commands.  */
+
+/* These variables describe the input file name.
+   input_file_number is the index on outfiles of this file,
+   so that the output file name can be stored for later use by %o.
+   input_basename is the start of the part of the input file
+   sans all directory names, and basename_length is the number
+   of characters starting there excluding the suffix .c or whatever.  */
+
+static const char *input_filename;
+static int input_file_number;
+size_t input_filename_length;
+static int basename_length;
+static int suffixed_basename_length;
+static const char *input_basename;
+static const char *input_suffix;
+#ifndef HOST_LACKS_INODE_NUMBERS
+static struct stat input_stat;
+#endif
+static int input_stat_set;
+
+/* The compiler used to process the current input file.  */
+static struct compiler *input_file_compiler;
+
+/* These are variables used within do_spec and do_spec_1.  */
+
+/* Nonzero if an arg has been started and not yet terminated
+   (with space, tab or newline).  */
+static int arg_going;
+
+/* Nonzero means %d or %g has been seen; the next arg to be terminated
+   is a temporary file name.  */
+static int delete_this_arg;
+
+/* Nonzero means %w has been seen; the next arg to be terminated
+   is the output file name of this compilation.  */
+static int this_is_output_file;
+
+/* Nonzero means %s has been seen; the next arg to be terminated
+   is the name of a library file and we should try the standard
+   search dirs for it.  */
+static int this_is_library_file;
+
+/* Nonzero means that the input of this command is coming from a pipe.  */
+static int input_from_pipe;
+
+/* Nonnull means substitute this for any suffix when outputting a switches
+   arguments.  */
+static const char *suffix_subst;
+
+/* If there is an argument being accumulated, terminate it and store it.  */
+
+static void
+end_going_arg (void)
+{
+  if (arg_going)
+    {
+      const char *string;
+
+      obstack_1grow (&obstack, 0);
+      string = XOBFINISH (&obstack, const char *);
+      if (this_is_library_file)
+	string = find_file (string);
+      store_arg (string, delete_this_arg, this_is_output_file);
+      if (this_is_output_file)
+	outfiles[input_file_number] = string;
+      arg_going = 0;
+    }
+}
+
+
+/* Parse the WRAPPER string which is a comma separated list of the command line
+   and insert them into the beginning of argbuf.  */
+
+static void
+insert_wrapper (const char *wrapper)
+{
+  int n = 0;
+  int i;
+  char *buf = xstrdup (wrapper);
+  char *p = buf;
+
+  do
+    {
+      n++;
+      while (*p == ',')
+        p++;
+    }
+  while ((p = strchr (p, ',')) != NULL);
+
+  if (argbuf_index + n >= argbuf_length)
+    {
+      argbuf_length = argbuf_length * 2;
+      while (argbuf_length < argbuf_index + n)
+	argbuf_length *= 2;
+      argbuf = XRESIZEVEC (const char *, argbuf, argbuf_length);
+    }
+  for (i = argbuf_index - 1; i >= 0; i--)
+    argbuf[i + n] = argbuf[i];
+
+  i = 0;
+  p = buf;
+  do
+    {
+      while (*p == ',')
+        {
+          *p = 0;
+          p++;
+        }
+      argbuf[i++] = p;
+    }
+  while ((p = strchr (p, ',')) != NULL);
+  gcc_assert (i == n);
+  argbuf_index += n;
+}
+
+/* Process the spec SPEC and run the commands specified therein.
+   Returns 0 if the spec is successfully processed; -1 if failed.  */
+
+int
+do_spec (const char *spec)
+{
+  int value;
+
+  value = do_spec_2 (spec);
+
+  /* Force out any unfinished command.
+     If -pipe, this forces out the last command if it ended in `|'.  */
+  if (value == 0)
+    {
+      if (argbuf_index > 0 && !strcmp (argbuf[argbuf_index - 1], "|"))
+	argbuf_index--;
+
+      set_collect_gcc_options ();
+
+      if (argbuf_index > 0)
+	value = execute ();
+    }
+
+  return value;
+}
+
+static int
+do_spec_2 (const char *spec)
+{
+  int result;
+
+  clear_args ();
+  arg_going = 0;
+  delete_this_arg = 0;
+  this_is_output_file = 0;
+  this_is_library_file = 0;
+  input_from_pipe = 0;
+  suffix_subst = NULL;
+
+  result = do_spec_1 (spec, 0, NULL);
+
+  end_going_arg ();
+
+  return result;
+}
+
+
+/* Process the given spec string and add any new options to the end
+   of the switches/n_switches array.  */
+
+static void
+do_option_spec (const char *name, const char *spec)
+{
+  unsigned int i, value_count, value_len;
+  const char *p, *q, *value;
+  char *tmp_spec, *tmp_spec_p;
+
+  if (configure_default_options[0].name == NULL)
+    return;
+
+  for (i = 0; i < ARRAY_SIZE (configure_default_options); i++)
+    if (strcmp (configure_default_options[i].name, name) == 0)
+      break;
+  if (i == ARRAY_SIZE (configure_default_options))
+    return;
+
+  value = configure_default_options[i].value;
+  value_len = strlen (value);
+
+  /* Compute the size of the final spec.  */
+  value_count = 0;
+  p = spec;
+  while ((p = strstr (p, "%(VALUE)")) != NULL)
+    {
+      p ++;
+      value_count ++;
+    }
+
+  /* Replace each %(VALUE) by the specified value.  */
+  tmp_spec = (char *) alloca (strlen (spec) + 1
+		     + value_count * (value_len - strlen ("%(VALUE)")));
+  tmp_spec_p = tmp_spec;
+  q = spec;
+  while ((p = strstr (q, "%(VALUE)")) != NULL)
+    {
+      memcpy (tmp_spec_p, q, p - q);
+      tmp_spec_p = tmp_spec_p + (p - q);
+      memcpy (tmp_spec_p, value, value_len);
+      tmp_spec_p += value_len;
+      q = p + strlen ("%(VALUE)");
+    }
+  strcpy (tmp_spec_p, q);
+
+  do_self_spec (tmp_spec);
+}
+
+/* Process the given spec string and add any new options to the end
+   of the switches/n_switches array.  */
+
+static void
+do_self_spec (const char *spec)
+{
+  do_spec_2 (spec);
+  do_spec_1 (" ", 0, NULL);
+
+  if (argbuf_index > 0)
+    {
+      int i, first;
+
+      first = n_switches;
+      n_switches += argbuf_index;
+      switches = XRESIZEVEC (struct switchstr, switches, n_switches + 1);
+
+      switches[n_switches] = switches[first];
+      for (i = 0; i < argbuf_index; i++)
+	{
+	  struct switchstr *sw;
+
+	  /* Each switch should start with '-'.  */
+	  if (argbuf[i][0] != '-')
+	    fatal ("switch '%s' does not start with '-'", argbuf[i]);
+
+	  sw = &switches[i + first];
+	  sw->part1 = &argbuf[i][1];
+	  sw->args = 0;
+	  sw->live_cond = 0;
+	  sw->validated = 0;
+	  sw->ordering = 0;
+	}
+    }
+}
+
+/* Callback for processing %D and %I specs.  */
+
+struct spec_path_info {
+  const char *option;
+  const char *append;
+  size_t append_len;
+  bool omit_relative;
+  bool separate_options;
+};
+
+static void *
+spec_path (char *path, void *data)
+{
+  struct spec_path_info *info = (struct spec_path_info *) data;
+  size_t len = 0;
+  char save = 0;
+
+  if (info->omit_relative && !IS_ABSOLUTE_PATH (path))
+    return NULL;
+
+  if (info->append_len != 0)
+    {
+      len = strlen (path);
+      memcpy (path + len, info->append, info->append_len + 1);
+    }
+
+  if (!is_directory (path, true))
+    return NULL;
+
+  do_spec_1 (info->option, 1, NULL);
+  if (info->separate_options)
+    do_spec_1 (" ", 0, NULL);
+
+  if (info->append_len == 0)
+    {
+      len = strlen (path);
+      save = path[len - 1];
+      if (IS_DIR_SEPARATOR (path[len - 1]))
+	path[len - 1] = '\0';
+    }
+
+  do_spec_1 (path, 1, NULL);
+  do_spec_1 (" ", 0, NULL);
+
+  /* Must not damage the original path.  */
+  if (info->append_len == 0)
+    path[len - 1] = save;
+
+  return NULL;
+}
+
+/* Process the sub-spec SPEC as a portion of a larger spec.
+   This is like processing a whole spec except that we do
+   not initialize at the beginning and we do not supply a
+   newline by default at the end.
+   INSWITCH nonzero means don't process %-sequences in SPEC;
+   in this case, % is treated as an ordinary character.
+   This is used while substituting switches.
+   INSWITCH nonzero also causes SPC not to terminate an argument.
+
+   Value is zero unless a line was finished
+   and the command on that line reported an error.  */
+
+static int
+do_spec_1 (const char *spec, int inswitch, const char *soft_matched_part)
+{
+  const char *p = spec;
+  int c;
+  int i;
+  int value;
+
+  while ((c = *p++))
+    /* If substituting a switch, treat all chars like letters.
+       Otherwise, NL, SPC, TAB and % are special.  */
+    switch (inswitch ? 'a' : c)
+      {
+      case '\n':
+	end_going_arg ();
+
+	if (argbuf_index > 0 && !strcmp (argbuf[argbuf_index - 1], "|"))
+	  {
+	    /* A `|' before the newline means use a pipe here,
+	       but only if -pipe was specified.
+	       Otherwise, execute now and don't pass the `|' as an arg.  */
+	    if (use_pipes)
+	      {
+		input_from_pipe = 1;
+		break;
+	      }
+	    else
+	      argbuf_index--;
+	  }
+
+	set_collect_gcc_options ();
+
+	if (argbuf_index > 0)
+	  {
+	    value = execute ();
+	    if (value)
+	      return value;
+	  }
+	/* Reinitialize for a new command, and for a new argument.  */
+	clear_args ();
+	arg_going = 0;
+	delete_this_arg = 0;
+	this_is_output_file = 0;
+	this_is_library_file = 0;
+	input_from_pipe = 0;
+	break;
+
+      case '|':
+	end_going_arg ();
+
+	/* Use pipe */
+	obstack_1grow (&obstack, c);
+	arg_going = 1;
+	break;
+
+      case '\t':
+      case ' ':
+	end_going_arg ();
+
+	/* Reinitialize for a new argument.  */
+	delete_this_arg = 0;
+	this_is_output_file = 0;
+	this_is_library_file = 0;
+	break;
+
+      case '%':
+	switch (c = *p++)
+	  {
+	  case 0:
+	    fatal ("spec '%s' invalid", spec);
+
+	  case 'b':
+	    obstack_grow (&obstack, input_basename, basename_length);
+	    arg_going = 1;
+	    break;
+
+	  case 'B':
+	    obstack_grow (&obstack, input_basename, suffixed_basename_length);
+	    arg_going = 1;
+	    break;
+
+	  case 'd':
+	    delete_this_arg = 2;
+	    break;
+
+	  /* Dump out the directories specified with LIBRARY_PATH,
+	     followed by the absolute directories
+	     that we search for startfiles.  */
+	  case 'D':
+	    {
+	      struct spec_path_info info;
+
+	      info.option = "-L";
+	      info.append_len = 0;
+#ifdef RELATIVE_PREFIX_NOT_LINKDIR
+	      /* Used on systems which record the specified -L dirs
+		 and use them to search for dynamic linking.
+		 Relative directories always come from -B,
+		 and it is better not to use them for searching
+		 at run time.  In particular, stage1 loses.  */
+	      info.omit_relative = true;
+#else
+	      info.omit_relative = false;
+#endif
+	      info.separate_options = false;
+
+	      for_each_path (&startfile_prefixes, true, 0, spec_path, &info);
+	    }
+	    break;
+
+	  case 'e':
+	    /* %efoo means report an error with `foo' as error message
+	       and don't execute any more commands for this file.  */
+	    {
+	      const char *q = p;
+	      char *buf;
+	      while (*p != 0 && *p != '\n')
+		p++;
+	      buf = (char *) alloca (p - q + 1);
+	      strncpy (buf, q, p - q);
+	      buf[p - q] = 0;
+	      error ("%s", buf);
+	      return -1;
+	    }
+	    break;
+	  case 'n':
+	    /* %nfoo means report a notice with `foo' on stderr.  */
+	    {
+	      const char *q = p;
+	      char *buf;
+	      while (*p != 0 && *p != '\n')
+		p++;
+	      buf = (char *) alloca (p - q + 1);
+	      strncpy (buf, q, p - q);
+	      buf[p - q] = 0;
+	      notice ("%s\n", buf);
+	      if (*p)
+		p++;
+	    }
+	    break;
+
+	  case 'j':
+	    {
+	      struct stat st;
+
+	      /* If save_temps_flag is off, and the HOST_BIT_BUCKET is
+		 defined, and it is not a directory, and it is
+		 writable, use it.  Otherwise, treat this like any
+		 other temporary file.  */
+
+	      if ((!save_temps_flag)
+		  && (stat (HOST_BIT_BUCKET, &st) == 0) && (!S_ISDIR (st.st_mode))
+		  && (access (HOST_BIT_BUCKET, W_OK) == 0))
+		{
+		  obstack_grow (&obstack, HOST_BIT_BUCKET,
+				strlen (HOST_BIT_BUCKET));
+		  delete_this_arg = 0;
+		  arg_going = 1;
+		  break;
+		}
+	    }
+	    goto create_temp_file;
+	  case '|':
+	    if (use_pipes)
+	      {
+		obstack_1grow (&obstack, '-');
+		delete_this_arg = 0;
+		arg_going = 1;
+
+		/* consume suffix */
+		while (*p == '.' || ISALNUM ((unsigned char) *p))
+		  p++;
+		if (p[0] == '%' && p[1] == 'O')
+		  p += 2;
+
+		break;
+	      }
+	    goto create_temp_file;
+	  case 'm':
+	    if (use_pipes)
+	      {
+		/* consume suffix */
+		while (*p == '.' || ISALNUM ((unsigned char) *p))
+		  p++;
+		if (p[0] == '%' && p[1] == 'O')
+		  p += 2;
+
+		break;
+	      }
+	    goto create_temp_file;
+	  case 'g':
+	  case 'u':
+	  case 'U':
+	  create_temp_file:
+	      {
+		struct temp_name *t;
+		int suffix_length;
+		const char *suffix = p;
+		char *saved_suffix = NULL;
+
+		while (*p == '.' || ISALNUM ((unsigned char) *p))
+		  p++;
+		suffix_length = p - suffix;
+		if (p[0] == '%' && p[1] == 'O')
+		  {
+		    p += 2;
+		    /* We don't support extra suffix characters after %O.  */
+		    if (*p == '.' || ISALNUM ((unsigned char) *p))
+		      fatal ("spec '%s' has invalid '%%0%c'", spec, *p);
+		    if (suffix_length == 0)
+		      suffix = TARGET_OBJECT_SUFFIX;
+		    else
+		      {
+			saved_suffix
+			  = XNEWVEC (char, suffix_length
+				     + strlen (TARGET_OBJECT_SUFFIX));
+			strncpy (saved_suffix, suffix, suffix_length);
+			strcpy (saved_suffix + suffix_length,
+				TARGET_OBJECT_SUFFIX);
+		      }
+		    suffix_length += strlen (TARGET_OBJECT_SUFFIX);
+		  }
+
+		/* If the input_filename has the same suffix specified
+		   for the %g, %u, or %U, and -save-temps is specified,
+		   we could end up using that file as an intermediate
+		   thus clobbering the user's source file (.e.g.,
+		   gcc -save-temps foo.s would clobber foo.s with the
+		   output of cpp0).  So check for this condition and
+		   generate a temp file as the intermediate.  */
+
+		if (save_temps_flag)
+		  {
+		    char *tmp;
+		    
+		    temp_filename_length = basename_length + suffix_length;
+		    tmp = (char *) alloca (temp_filename_length + 1);
+		    strncpy (tmp, input_basename, basename_length);
+		    strncpy (tmp + basename_length, suffix, suffix_length);
+		    tmp[temp_filename_length] = '\0';
+		    temp_filename = tmp;
+		    if (strcmp (temp_filename, input_filename) != 0)
+		      {
+#ifndef HOST_LACKS_INODE_NUMBERS
+			struct stat st_temp;
+
+			/* Note, set_input() resets input_stat_set to 0.  */
+			if (input_stat_set == 0)
+			  {
+			    input_stat_set = stat (input_filename, &input_stat);
+			    if (input_stat_set >= 0)
+			      input_stat_set = 1;
+			  }
+
+			/* If we have the stat for the input_filename
+			   and we can do the stat for the temp_filename
+			   then the they could still refer to the same
+			   file if st_dev/st_ino's are the same.  */
+			if (input_stat_set != 1
+			    || stat (temp_filename, &st_temp) < 0
+			    || input_stat.st_dev != st_temp.st_dev
+			    || input_stat.st_ino != st_temp.st_ino)
+#else
+			/* Just compare canonical pathnames.  */
+			char* input_realname = lrealpath (input_filename);
+			char* temp_realname = lrealpath (temp_filename);
+			bool files_differ = strcmp (input_realname, temp_realname);
+			free (input_realname);
+			free (temp_realname);
+			if (files_differ)
+#endif
+			  {
+			    temp_filename = save_string (temp_filename,
+							 temp_filename_length + 1);
+			    obstack_grow (&obstack, temp_filename,
+						    temp_filename_length);
+			    arg_going = 1;
+			    delete_this_arg = 0;
+			    break;
+			  }
+		      }
+		  }
+
+		/* See if we already have an association of %g/%u/%U and
+		   suffix.  */
+		for (t = temp_names; t; t = t->next)
+		  if (t->length == suffix_length
+		      && strncmp (t->suffix, suffix, suffix_length) == 0
+		      && t->unique == (c == 'u' || c == 'U' || c == 'j'))
+		    break;
+
+		/* Make a new association if needed.  %u and %j
+		   require one.  */
+		if (t == 0 || c == 'u' || c == 'j')
+		  {
+		    if (t == 0)
+		      {
+			t = XNEW (struct temp_name);
+			t->next = temp_names;
+			temp_names = t;
+		      }
+		    t->length = suffix_length;
+		    if (saved_suffix)
+		      {
+			t->suffix = saved_suffix;
+			saved_suffix = NULL;
+		      }
+		    else
+		      t->suffix = save_string (suffix, suffix_length);
+		    t->unique = (c == 'u' || c == 'U' || c == 'j');
+		    temp_filename = make_temp_file (t->suffix);
+		    temp_filename_length = strlen (temp_filename);
+		    t->filename = temp_filename;
+		    t->filename_length = temp_filename_length;
+		  }
+
+		if (saved_suffix)
+		  free (saved_suffix);
+
+		obstack_grow (&obstack, t->filename, t->filename_length);
+		delete_this_arg = 1;
+	      }
+	    arg_going = 1;
+	    break;
+
+	  case 'i':
+	    if (combine_inputs)
+	      {
+		for (i = 0; (int) i < n_infiles; i++)
+		  if ((!infiles[i].language) || (infiles[i].language[0] != '*'))
+		    if (infiles[i].incompiler == input_file_compiler)
+		      {
+			store_arg (infiles[i].name, 0, 0);
+			infiles[i].compiled = true;
+		      }
+	      }
+	    else
+	      {
+		obstack_grow (&obstack, input_filename, input_filename_length);
+		arg_going = 1;
+	      }
+	    break;
+
+	  case 'I':
+	    {
+	      struct spec_path_info info;
+
+	      if (multilib_dir)
+		{
+		  do_spec_1 ("-imultilib", 1, NULL);
+		  /* Make this a separate argument.  */
+		  do_spec_1 (" ", 0, NULL);
+		  do_spec_1 (multilib_dir, 1, NULL);
+		  do_spec_1 (" ", 0, NULL);
+		}
+
+	      if (gcc_exec_prefix)
+		{
+		  do_spec_1 ("-iprefix", 1, NULL);
+		  /* Make this a separate argument.  */
+		  do_spec_1 (" ", 0, NULL);
+		  do_spec_1 (gcc_exec_prefix, 1, NULL);
+		  do_spec_1 (" ", 0, NULL);
+		}
+
+	      if (target_system_root_changed ||
+		  (target_system_root && target_sysroot_hdrs_suffix))
+		{
+		  do_spec_1 ("-isysroot", 1, NULL);
+		  /* Make this a separate argument.  */
+		  do_spec_1 (" ", 0, NULL);
+		  do_spec_1 (target_system_root, 1, NULL);
+		  if (target_sysroot_hdrs_suffix)
+		    do_spec_1 (target_sysroot_hdrs_suffix, 1, NULL);
+		  do_spec_1 (" ", 0, NULL);
+		}
+
+	      info.option = "-isystem";
+	      info.append = "include";
+	      info.append_len = strlen (info.append);
+	      info.omit_relative = false;
+	      info.separate_options = true;
+
+	      for_each_path (&include_prefixes, false, info.append_len,
+			     spec_path, &info);
+
+	      info.append = "include-fixed";
+	      if (*sysroot_hdrs_suffix_spec)
+		info.append = concat (info.append, dir_separator_str,
+				      multilib_dir, NULL);
+	      info.append_len = strlen (info.append);
+	      for_each_path (&include_prefixes, false, info.append_len,
+			     spec_path, &info);
+	    }
+	    break;
+
+	  case 'o':
+	    {
+	      int max = n_infiles;
+	      max += lang_specific_extra_outfiles;
+
+              if (HAVE_GNU_LD && at_file_supplied)
+                {
+                  /* We are going to expand `%o' to `@FILE', where FILE
+                     is a newly-created temporary filename.  The filenames
+                     that would usually be expanded in place of %o will be
+                     written to the temporary file.  */
+
+                  char *temp_file = make_temp_file ("");
+                  char *at_argument;
+                  char **argv;
+                  int n_files, j, status;
+                  FILE *f;
+
+                  at_argument = concat ("@", temp_file, NULL);
+                  store_arg (at_argument, 0, 0);
+
+                  /* Convert OUTFILES into a form suitable for writeargv.  */
+
+                  /* Determine how many are non-NULL.  */
+                  for (n_files = 0, i = 0; i < max; i++)
+                    n_files += outfiles[i] != NULL;
+
+                  argv = (char **) alloca (sizeof (char *) * (n_files + 1));
+
+                  /* Copy the strings over.  */
+                  for (i = 0, j = 0; i < max; i++)
+                    if (outfiles[i])
+                      {
+                        argv[j] = CONST_CAST (char *, outfiles[i]);
+                        j++;
+                      }
+                  argv[j] = NULL;
+
+                  f = fopen (temp_file, "w");
+
+                  if (f == NULL)
+                    fatal ("could not open temporary response file %s",
+                           temp_file);
+
+                  status = writeargv (argv, f);
+
+                  if (status)
+                    fatal ("could not write to temporary response file %s",
+                           temp_file);
+
+                  status = fclose (f);
+
+                  if (EOF == status)
+                    fatal ("could not close temporary response file %s",
+                           temp_file);
+
+                  record_temp_file (temp_file, !save_temps_flag, !save_temps_flag);
+                }
+              else
+                for (i = 0; i < max; i++)
+	          if (outfiles[i])
+		    store_arg (outfiles[i], 0, 0);
+	      break;
+	    }
+
+	  case 'O':
+	    obstack_grow (&obstack, TARGET_OBJECT_SUFFIX, strlen (TARGET_OBJECT_SUFFIX));
+	    arg_going = 1;
+	    break;
+
+	  case 's':
+	    this_is_library_file = 1;
+	    break;
+
+	  case 'V':
+	    outfiles[input_file_number] = NULL;
+	    break;
+
+	  case 'w':
+	    this_is_output_file = 1;
+	    break;
+
+	  case 'W':
+	    {
+	      int cur_index = argbuf_index;
+	      /* Handle the {...} following the %W.  */
+	      if (*p != '{')
+		fatal ("spec '%s' has invalid '%%W%c", spec, *p);
+	      p = handle_braces (p + 1);
+	      if (p == 0)
+		return -1;
+	      end_going_arg ();
+	      /* If any args were output, mark the last one for deletion
+		 on failure.  */
+	      if (argbuf_index != cur_index)
+		record_temp_file (argbuf[argbuf_index - 1], 0, 1);
+	      break;
+	    }
+
+	  /* %x{OPTION} records OPTION for %X to output.  */
+	  case 'x':
+	    {
+	      const char *p1 = p;
+	      char *string;
+
+	      /* Skip past the option value and make a copy.  */
+	      if (*p != '{')
+		fatal ("spec '%s' has invalid '%%x%c'", spec, *p);
+	      while (*p++ != '}')
+		;
+	      string = save_string (p1 + 1, p - p1 - 2);
+
+	      /* See if we already recorded this option.  */
+	      for (i = 0; i < n_linker_options; i++)
+		if (! strcmp (string, linker_options[i]))
+		  {
+		    free (string);
+		    return 0;
+		  }
+
+	      /* This option is new; add it.  */
+	      add_linker_option (string, strlen (string));
+	    }
+	    break;
+
+	  /* Dump out the options accumulated previously using %x.  */
+	  case 'X':
+	    for (i = 0; i < n_linker_options; i++)
+	      {
+		do_spec_1 (linker_options[i], 1, NULL);
+		/* Make each accumulated option a separate argument.  */
+		do_spec_1 (" ", 0, NULL);
+	      }
+	    break;
+
+	  /* Dump out the options accumulated previously using -Wa,.  */
+	  case 'Y':
+	    for (i = 0; i < n_assembler_options; i++)
+	      {
+		do_spec_1 (assembler_options[i], 1, NULL);
+		/* Make each accumulated option a separate argument.  */
+		do_spec_1 (" ", 0, NULL);
+	      }
+	    break;
+
+	  /* Dump out the options accumulated previously using -Wp,.  */
+	  case 'Z':
+	    for (i = 0; i < n_preprocessor_options; i++)
+	      {
+		do_spec_1 (preprocessor_options[i], 1, NULL);
+		/* Make each accumulated option a separate argument.  */
+		do_spec_1 (" ", 0, NULL);
+	      }
+	    break;
+
+	    /* Here are digits and numbers that just process
+	       a certain constant string as a spec.  */
+
+	  case '1':
+	    value = do_spec_1 (cc1_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case '2':
+	    value = do_spec_1 (cc1plus_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case 'a':
+	    value = do_spec_1 (asm_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case 'A':
+	    value = do_spec_1 (asm_final_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case 'C':
+	    {
+	      const char *const spec
+		= (input_file_compiler->cpp_spec
+		   ? input_file_compiler->cpp_spec
+		   : cpp_spec);
+	      value = do_spec_1 (spec, 0, NULL);
+	      if (value != 0)
+		return value;
+	    }
+	    break;
+
+	  case 'E':
+	    value = do_spec_1 (endfile_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case 'l':
+	    value = do_spec_1 (link_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case 'L':
+	    value = do_spec_1 (lib_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case 'G':
+	    value = do_spec_1 (libgcc_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	  case 'R':
+	    /* We assume there is a directory
+	       separator at the end of this string.  */
+	    if (target_system_root)
+	      {
+	        obstack_grow (&obstack, target_system_root,
+			      strlen (target_system_root));
+		if (target_sysroot_suffix)
+		  obstack_grow (&obstack, target_sysroot_suffix,
+				strlen (target_sysroot_suffix));
+	      }
+	    break;
+
+	  case 'S':
+	    value = do_spec_1 (startfile_spec, 0, NULL);
+	    if (value != 0)
+	      return value;
+	    break;
+
+	    /* Here we define characters other than letters and digits.  */
+
+	  case '{':
+	    p = handle_braces (p);
+	    if (p == 0)
+	      return -1;
+	    break;
+
+	  case ':':
+	    p = handle_spec_function (p);
+	    if (p == 0)
+	      return -1;
+	    break;
+
+	  case '%':
+	    obstack_1grow (&obstack, '%');
+	    break;
+
+	  case '.':
+	    {
+	      unsigned len = 0;
+
+	      while (p[len] && p[len] != ' ' && p[len] != '%')
+		len++;
+	      suffix_subst = save_string (p - 1, len + 1);
+	      p += len;
+	    }
+	   break;
+
+	   /* Henceforth ignore the option(s) matching the pattern
+	      after the %<.  */
+	  case '<':
+	    {
+	      unsigned len = 0;
+	      int have_wildcard = 0;
+	      int i;
+
+	      while (p[len] && p[len] != ' ' && p[len] != '\t')
+		len++;
+
+	      if (p[len-1] == '*')
+		have_wildcard = 1;
+
+	      for (i = 0; i < n_switches; i++)
+		if (!strncmp (switches[i].part1, p, len - have_wildcard)
+		    && (have_wildcard || switches[i].part1[len] == '\0'))
+		  {
+		    switches[i].live_cond |= SWITCH_IGNORE;
+		    switches[i].validated = 1;
+		  }
+
+	      p += len;
+	    }
+	    break;
+
+	  case '*':
+	    if (soft_matched_part)
+	      {
+		do_spec_1 (soft_matched_part, 1, NULL);
+		do_spec_1 (" ", 0, NULL);
+	      }
+	    else
+	      /* Catch the case where a spec string contains something like
+		 '%{foo:%*}'.  i.e. there is no * in the pattern on the left
+		 hand side of the :.  */
+	      error ("spec failure: '%%*' has not been initialized by pattern match");
+	    break;
+
+	    /* Process a string found as the value of a spec given by name.
+	       This feature allows individual machine descriptions
+	       to add and use their own specs.
+	       %[...] modifies -D options the way %P does;
+	       %(...) uses the spec unmodified.  */
+	  case '[':
+	    error ("warning: use of obsolete %%[ operator in specs");
+	  case '(':
+	    {
+	      const char *name = p;
+	      struct spec_list *sl;
+	      int len;
+
+	      /* The string after the S/P is the name of a spec that is to be
+		 processed.  */
+	      while (*p && *p != ')' && *p != ']')
+		p++;
+
+	      /* See if it's in the list.  */
+	      for (len = p - name, sl = specs; sl; sl = sl->next)
+		if (sl->name_len == len && !strncmp (sl->name, name, len))
+		  {
+		    name = *(sl->ptr_spec);
+#ifdef DEBUG_SPECS
+		    notice ("Processing spec %c%s%c, which is '%s'\n",
+			    c, sl->name, (c == '(') ? ')' : ']', name);
+#endif
+		    break;
+		  }
+
+	      if (sl)
+		{
+		  if (c == '(')
+		    {
+		      value = do_spec_1 (name, 0, NULL);
+		      if (value != 0)
+			return value;
+		    }
+		  else
+		    {
+		      char *x = (char *) alloca (strlen (name) * 2 + 1);
+		      char *buf = x;
+		      const char *y = name;
+		      int flag = 0;
+
+		      /* Copy all of NAME into BUF, but put __ after
+			 every -D and at the end of each arg.  */
+		      while (1)
+			{
+			  if (! strncmp (y, "-D", 2))
+			    {
+			      *x++ = '-';
+			      *x++ = 'D';
+			      *x++ = '_';
+			      *x++ = '_';
+			      y += 2;
+			      flag = 1;
+			      continue;
+			    }
+			  else if (flag
+				   && (*y == ' ' || *y == '\t' || *y == '='
+				       || *y == '}' || *y == 0))
+			    {
+			      *x++ = '_';
+			      *x++ = '_';
+			      flag = 0;
+			    }
+			  if (*y == 0)
+			    break;
+			  else
+			    *x++ = *y++;
+			}
+		      *x = 0;
+
+		      value = do_spec_1 (buf, 0, NULL);
+		      if (value != 0)
+			return value;
+		    }
+		}
+
+	      /* Discard the closing paren or bracket.  */
+	      if (*p)
+		p++;
+	    }
+	    break;
+
+	  default:
+	    error ("spec failure: unrecognized spec option '%c'", c);
+	    break;
+	  }
+	break;
+
+      case '\\':
+	/* Backslash: treat next character as ordinary.  */
+	c = *p++;
+
+	/* Fall through.  */
+      default:
+	/* Ordinary character: put it into the current argument.  */
+	obstack_1grow (&obstack, c);
+	arg_going = 1;
+      }
+
+  /* End of string.  If we are processing a spec function, we need to
+     end any pending argument.  */
+  if (processing_spec_function)
+    end_going_arg ();
+
+  return 0;
+}
+
+/* Look up a spec function.  */
+
+static const struct spec_function *
+lookup_spec_function (const char *name)
+{
+  const struct spec_function *sf;
+
+  for (sf = static_spec_functions; sf->name != NULL; sf++)
+    if (strcmp (sf->name, name) == 0)
+      return sf;
+
+  return NULL;
+}
+
+/* Evaluate a spec function.  */
+
+static const char *
+eval_spec_function (const char *func, const char *args)
+{
+  const struct spec_function *sf;
+  const char *funcval;
+
+  /* Saved spec processing context.  */
+  int save_argbuf_index;
+  int save_argbuf_length;
+  const char **save_argbuf;
+
+  int save_arg_going;
+  int save_delete_this_arg;
+  int save_this_is_output_file;
+  int save_this_is_library_file;
+  int save_input_from_pipe;
+  const char *save_suffix_subst;
+
+
+  sf = lookup_spec_function (func);
+  if (sf == NULL)
+    fatal ("unknown spec function '%s'", func);
+
+  /* Push the spec processing context.  */
+  save_argbuf_index = argbuf_index;
+  save_argbuf_length = argbuf_length;
+  save_argbuf = argbuf;
+
+  save_arg_going = arg_going;
+  save_delete_this_arg = delete_this_arg;
+  save_this_is_output_file = this_is_output_file;
+  save_this_is_library_file = this_is_library_file;
+  save_input_from_pipe = input_from_pipe;
+  save_suffix_subst = suffix_subst;
+
+  /* Create a new spec processing context, and build the function
+     arguments.  */
+
+  alloc_args ();
+  if (do_spec_2 (args) < 0)
+    fatal ("error in args to spec function '%s'", func);
+
+  /* argbuf_index is an index for the next argument to be inserted, and
+     so contains the count of the args already inserted.  */
+
+  funcval = (*sf->func) (argbuf_index, argbuf);
+
+  /* Pop the spec processing context.  */
+  argbuf_index = save_argbuf_index;
+  argbuf_length = save_argbuf_length;
+  free (argbuf);
+  argbuf = save_argbuf;
+
+  arg_going = save_arg_going;
+  delete_this_arg = save_delete_this_arg;
+  this_is_output_file = save_this_is_output_file;
+  this_is_library_file = save_this_is_library_file;
+  input_from_pipe = save_input_from_pipe;
+  suffix_subst = save_suffix_subst;
+
+  return funcval;
+}
+
+/* Handle a spec function call of the form:
+
+   %:function(args)
+
+   ARGS is processed as a spec in a separate context and split into an
+   argument vector in the normal fashion.  The function returns a string
+   containing a spec which we then process in the caller's context, or
+   NULL if no processing is required.  */
+
+static const char *
+handle_spec_function (const char *p)
+{
+  char *func, *args;
+  const char *endp, *funcval;
+  int count;
+
+  processing_spec_function++;
+
+  /* Get the function name.  */
+  for (endp = p; *endp != '\0'; endp++)
+    {
+      if (*endp == '(')		/* ) */
+        break;
+      /* Only allow [A-Za-z0-9], -, and _ in function names.  */
+      if (!ISALNUM (*endp) && !(*endp == '-' || *endp == '_'))
+	fatal ("malformed spec function name");
+    }
+  if (*endp != '(')		/* ) */
+    fatal ("no arguments for spec function");
+  func = save_string (p, endp - p);
+  p = ++endp;
+
+  /* Get the arguments.  */
+  for (count = 0; *endp != '\0'; endp++)
+    {
+      /* ( */
+      if (*endp == ')')
+	{
+	  if (count == 0)
+	    break;
+	  count--;
+	}
+      else if (*endp == '(')	/* ) */
+	count++;
+    }
+  /* ( */
+  if (*endp != ')')
+    fatal ("malformed spec function arguments");
+  args = save_string (p, endp - p);
+  p = ++endp;
+
+  /* p now points to just past the end of the spec function expression.  */
+
+  funcval = eval_spec_function (func, args);
+  if (funcval != NULL && do_spec_1 (funcval, 0, NULL) < 0)
+    p = NULL;
+
+  free (func);
+  free (args);
+
+  processing_spec_function--;
+
+  return p;
+}
+
+/* Inline subroutine of handle_braces.  Returns true if the current
+   input suffix matches the atom bracketed by ATOM and END_ATOM.  */
+static inline bool
+input_suffix_matches (const char *atom, const char *end_atom)
+{
+  return (input_suffix
+	  && !strncmp (input_suffix, atom, end_atom - atom)
+	  && input_suffix[end_atom - atom] == '\0');
+}
+
+/* Subroutine of handle_braces.  Returns true if the current
+   input file's spec name matches the atom bracketed by ATOM and END_ATOM.  */
+static bool
+input_spec_matches (const char *atom, const char *end_atom)
+{
+  return (input_file_compiler
+	  && input_file_compiler->suffix
+	  && input_file_compiler->suffix[0] != '\0'
+	  && !strncmp (input_file_compiler->suffix + 1, atom,
+		       end_atom - atom)
+	  && input_file_compiler->suffix[end_atom - atom + 1] == '\0');
+}
+
+/* Subroutine of handle_braces.  Returns true if a switch
+   matching the atom bracketed by ATOM and END_ATOM appeared on the
+   command line.  */
+static bool
+switch_matches (const char *atom, const char *end_atom, int starred)
+{
+  int i;
+  int len = end_atom - atom;
+  int plen = starred ? len : -1;
+
+  for (i = 0; i < n_switches; i++)
+    if (!strncmp (switches[i].part1, atom, len)
+	&& (starred || switches[i].part1[len] == '\0')
+	&& check_live_switch (i, plen))
+      return true;
+
+  return false;
+}
+
+/* Inline subroutine of handle_braces.  Mark all of the switches which
+   match ATOM (extends to END_ATOM; STARRED indicates whether there
+   was a star after the atom) for later processing.  */
+static inline void
+mark_matching_switches (const char *atom, const char *end_atom, int starred)
+{
+  int i;
+  int len = end_atom - atom;
+  int plen = starred ? len : -1;
+
+  for (i = 0; i < n_switches; i++)
+    if (!strncmp (switches[i].part1, atom, len)
+	&& (starred || switches[i].part1[len] == '\0')
+	&& check_live_switch (i, plen))
+      switches[i].ordering = 1;
+}
+
+/* Inline subroutine of handle_braces.  Process all the currently
+   marked switches through give_switch, and clear the marks.  */
+static inline void
+process_marked_switches (void)
+{
+  int i;
+
+  for (i = 0; i < n_switches; i++)
+    if (switches[i].ordering == 1)
+      {
+	switches[i].ordering = 0;
+	give_switch (i, 0);
+      }
+}
+
+/* Handle a %{ ... } construct.  P points just inside the leading {.
+   Returns a pointer one past the end of the brace block, or 0
+   if we call do_spec_1 and that returns -1.  */
+
+static const char *
+handle_braces (const char *p)
+{
+  const char *atom, *end_atom;
+  const char *d_atom = NULL, *d_end_atom = NULL;
+  const char *orig = p;
+
+  bool a_is_suffix;
+  bool a_is_spectype;
+  bool a_is_starred;
+  bool a_is_negated;
+  bool a_matched;
+
+  bool a_must_be_last = false;
+  bool ordered_set    = false;
+  bool disjunct_set   = false;
+  bool disj_matched   = false;
+  bool disj_starred   = true;
+  bool n_way_choice   = false;
+  bool n_way_matched  = false;
+
+#define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0)
+
+  do
+    {
+      if (a_must_be_last)
+	goto invalid;
+
+      /* Scan one "atom" (S in the description above of %{}, possibly
+	 with '!', '.', '@', ',', or '*' modifiers).  */
+      a_matched = false;
+      a_is_suffix = false;
+      a_is_starred = false;
+      a_is_negated = false;
+      a_is_spectype = false;
+
+      SKIP_WHITE();
+      if (*p == '!')
+	p++, a_is_negated = true;
+
+      SKIP_WHITE();
+      if (*p == '.')
+	p++, a_is_suffix = true;
+      else if (*p == ',')
+	p++, a_is_spectype = true;
+
+      atom = p;
+      while (ISIDNUM(*p) || *p == '-' || *p == '+' || *p == '='
+	     || *p == ',' || *p == '.' || *p == '@')
+	p++;
+      end_atom = p;
+
+      if (*p == '*')
+	p++, a_is_starred = 1;
+
+      SKIP_WHITE();
+      switch (*p)
+	{
+	case '&': case '}':
+	  /* Substitute the switch(es) indicated by the current atom.  */
+	  ordered_set = true;
+	  if (disjunct_set || n_way_choice || a_is_negated || a_is_suffix
+	      || a_is_spectype || atom == end_atom)
+	    goto invalid;
+
+	  mark_matching_switches (atom, end_atom, a_is_starred);
+
+	  if (*p == '}')
+	    process_marked_switches ();
+	  break;
+
+	case '|': case ':':
+	  /* Substitute some text if the current atom appears as a switch
+	     or suffix.  */
+	  disjunct_set = true;
+	  if (ordered_set)
+	    goto invalid;
+
+	  if (atom == end_atom)
+	    {
+	      if (!n_way_choice || disj_matched || *p == '|'
+		  || a_is_negated || a_is_suffix || a_is_spectype 
+		  || a_is_starred)
+		goto invalid;
+
+	      /* An empty term may appear as the last choice of an
+		 N-way choice set; it means "otherwise".  */
+	      a_must_be_last = true;
+	      disj_matched = !n_way_matched;
+	      disj_starred = false;
+	    }
+	  else
+	    {
+	      if ((a_is_suffix || a_is_spectype) && a_is_starred)
+		goto invalid;
+	      
+	      if (!a_is_starred)
+		disj_starred = false;
+
+	      /* Don't bother testing this atom if we already have a
+		 match.  */
+	      if (!disj_matched && !n_way_matched)
+		{
+		  if (a_is_suffix)
+		    a_matched = input_suffix_matches (atom, end_atom);
+		  else if (a_is_spectype)
+		    a_matched = input_spec_matches (atom, end_atom);
+		  else
+		    a_matched = switch_matches (atom, end_atom, a_is_starred);
+		  
+		  if (a_matched != a_is_negated)
+		    {
+		      disj_matched = true;
+		      d_atom = atom;
+		      d_end_atom = end_atom;
+		    }
+		}
+	    }
+
+	  if (*p == ':')
+	    {
+	      /* Found the body, that is, the text to substitute if the
+		 current disjunction matches.  */
+	      p = process_brace_body (p + 1, d_atom, d_end_atom, disj_starred,
+				      disj_matched && !n_way_matched);
+	      if (p == 0)
+		return 0;
+
+	      /* If we have an N-way choice, reset state for the next
+		 disjunction.  */
+	      if (*p == ';')
+		{
+		  n_way_choice = true;
+		  n_way_matched |= disj_matched;
+		  disj_matched = false;
+		  disj_starred = true;
+		  d_atom = d_end_atom = NULL;
+		}
+	    }
+	  break;
+
+	default:
+	  goto invalid;
+	}
+    }
+  while (*p++ != '}');
+
+  return p;
+
+ invalid:
+  fatal ("braced spec '%s' is invalid at '%c'", orig, *p);
+
+#undef SKIP_WHITE
+}
+
+/* Subroutine of handle_braces.  Scan and process a brace substitution body
+   (X in the description of %{} syntax).  P points one past the colon;
+   ATOM and END_ATOM bracket the first atom which was found to be true
+   (present) in the current disjunction; STARRED indicates whether all
+   the atoms in the current disjunction were starred (for syntax validation);
+   MATCHED indicates whether the disjunction matched or not, and therefore
+   whether or not the body is to be processed through do_spec_1 or just
+   skipped.  Returns a pointer to the closing } or ;, or 0 if do_spec_1
+   returns -1.  */
+
+static const char *
+process_brace_body (const char *p, const char *atom, const char *end_atom,
+		    int starred, int matched)
+{
+  const char *body, *end_body;
+  unsigned int nesting_level;
+  bool have_subst     = false;
+
+  /* Locate the closing } or ;, honoring nested braces.
+     Trim trailing whitespace.  */
+  body = p;
+  nesting_level = 1;
+  for (;;)
+    {
+      if (*p == '{')
+	nesting_level++;
+      else if (*p == '}')
+	{
+	  if (!--nesting_level)
+	    break;
+	}
+      else if (*p == ';' && nesting_level == 1)
+	break;
+      else if (*p == '%' && p[1] == '*' && nesting_level == 1)
+	have_subst = true;
+      else if (*p == '\0')
+	goto invalid;
+      p++;
+    }
+
+  end_body = p;
+  while (end_body[-1] == ' ' || end_body[-1] == '\t')
+    end_body--;
+
+  if (have_subst && !starred)
+    goto invalid;
+
+  if (matched)
+    {
+      /* Copy the substitution body to permanent storage and execute it.
+	 If have_subst is false, this is a simple matter of running the
+	 body through do_spec_1...  */
+      char *string = save_string (body, end_body - body);
+      if (!have_subst)
+	{
+	  if (do_spec_1 (string, 0, NULL) < 0)
+	    return 0;
+	}
+      else
+	{
+	  /* ... but if have_subst is true, we have to process the
+	     body once for each matching switch, with %* set to the
+	     variant part of the switch.  */
+	  unsigned int hard_match_len = end_atom - atom;
+	  int i;
+
+	  for (i = 0; i < n_switches; i++)
+	    if (!strncmp (switches[i].part1, atom, hard_match_len)
+		&& check_live_switch (i, hard_match_len))
+	      {
+		if (do_spec_1 (string, 0,
+			       &switches[i].part1[hard_match_len]) < 0)
+		  return 0;
+		/* Pass any arguments this switch has.  */
+		give_switch (i, 1);
+		suffix_subst = NULL;
+	      }
+	}
+    }
+
+  return p;
+
+ invalid:
+  fatal ("braced spec body '%s' is invalid", body);
+}
+
+/* Return 0 iff switch number SWITCHNUM is obsoleted by a later switch
+   on the command line.  PREFIX_LENGTH is the length of XXX in an {XXX*}
+   spec, or -1 if either exact match or %* is used.
+
+   A -O switch is obsoleted by a later -O switch.  A -f, -m, or -W switch
+   whose value does not begin with "no-" is obsoleted by the same value
+   with the "no-", similarly for a switch with the "no-" prefix.  */
+
+static int
+check_live_switch (int switchnum, int prefix_length)
+{
+  const char *name = switches[switchnum].part1;
+  int i;
+
+  /* In the common case of {<at-most-one-letter>*}, a negating
+     switch would always match, so ignore that case.  We will just
+     send the conflicting switches to the compiler phase.  */
+  if (prefix_length >= 0 && prefix_length <= 1)
+    return 1;
+
+  /* If we already processed this switch and determined if it was
+     live or not, return our past determination.  */
+  if (switches[switchnum].live_cond != 0)
+    return ((switches[switchnum].live_cond & SWITCH_LIVE) != 0
+	    && (switches[switchnum].live_cond & SWITCH_FALSE) == 0);
+
+  /* Now search for duplicate in a manner that depends on the name.  */
+  switch (*name)
+    {
+    case 'O':
+      for (i = switchnum + 1; i < n_switches; i++)
+	if (switches[i].part1[0] == 'O')
+	  {
+	    switches[switchnum].validated = 1;
+	    switches[switchnum].live_cond = SWITCH_FALSE;
+	    return 0;
+	  }
+      break;
+
+    case 'W':  case 'f':  case 'm':
+      if (! strncmp (name + 1, "no-", 3))
+	{
+	  /* We have Xno-YYY, search for XYYY.  */
+	  for (i = switchnum + 1; i < n_switches; i++)
+	    if (switches[i].part1[0] == name[0]
+		&& ! strcmp (&switches[i].part1[1], &name[4]))
+	      {
+		switches[switchnum].validated = 1;
+		switches[switchnum].live_cond = SWITCH_FALSE;
+		return 0;
+	      }
+	}
+      else
+	{
+	  /* We have XYYY, search for Xno-YYY.  */
+	  for (i = switchnum + 1; i < n_switches; i++)
+	    if (switches[i].part1[0] == name[0]
+		&& switches[i].part1[1] == 'n'
+		&& switches[i].part1[2] == 'o'
+		&& switches[i].part1[3] == '-'
+		&& !strcmp (&switches[i].part1[4], &name[1]))
+	      {
+		switches[switchnum].validated = 1;
+		switches[switchnum].live_cond = SWITCH_FALSE;
+		return 0;
+	      }
+	}
+      break;
+    }
+
+  /* Otherwise the switch is live.  */
+  switches[switchnum].live_cond |= SWITCH_LIVE;
+  return 1;
+}
+
+/* Pass a switch to the current accumulating command
+   in the same form that we received it.
+   SWITCHNUM identifies the switch; it is an index into
+   the vector of switches gcc received, which is `switches'.
+   This cannot fail since it never finishes a command line.
+
+   If OMIT_FIRST_WORD is nonzero, then we omit .part1 of the argument.  */
+
+static void
+give_switch (int switchnum, int omit_first_word)
+{
+  if ((switches[switchnum].live_cond & SWITCH_IGNORE) != 0)
+    return;
+
+  if (!omit_first_word)
+    {
+      do_spec_1 ("-", 0, NULL);
+      do_spec_1 (switches[switchnum].part1, 1, NULL);
+    }
+
+  if (switches[switchnum].args != 0)
+    {
+      const char **p;
+      for (p = switches[switchnum].args; *p; p++)
+	{
+	  const char *arg = *p;
+
+	  do_spec_1 (" ", 0, NULL);
+	  if (suffix_subst)
+	    {
+	      unsigned length = strlen (arg);
+	      int dot = 0;
+
+	      while (length-- && !IS_DIR_SEPARATOR (arg[length]))
+		if (arg[length] == '.')
+		  {
+		    (CONST_CAST(char *, arg))[length] = 0;
+		    dot = 1;
+		    break;
+		  }
+	      do_spec_1 (arg, 1, NULL);
+	      if (dot)
+		(CONST_CAST(char *, arg))[length] = '.';
+	      do_spec_1 (suffix_subst, 1, NULL);
+	    }
+	  else
+	    do_spec_1 (arg, 1, NULL);
+	}
+    }
+
+  do_spec_1 (" ", 0, NULL);
+  switches[switchnum].validated = 1;
+}
+
+/* Search for a file named NAME trying various prefixes including the
+   user's -B prefix and some standard ones.
+   Return the absolute file name found.  If nothing is found, return NAME.  */
+
+static const char *
+find_file (const char *name)
+{
+  char *newname = find_a_file (&startfile_prefixes, name, R_OK, true);
+  return newname ? newname : name;
+}
+
+/* Determine whether a directory exists.  If LINKER, return 0 for
+   certain fixed names not needed by the linker.  */
+
+static int
+is_directory (const char *path1, bool linker)
+{
+  int len1;
+  char *path;
+  char *cp;
+  struct stat st;
+
+  /* Ensure the string ends with "/.".  The resulting path will be a
+     directory even if the given path is a symbolic link.  */
+  len1 = strlen (path1);
+  path = (char *) alloca (3 + len1);
+  memcpy (path, path1, len1);
+  cp = path + len1;
+  if (!IS_DIR_SEPARATOR (cp[-1]))
+    *cp++ = DIR_SEPARATOR;
+  *cp++ = '.';
+  *cp = '\0';
+
+  /* Exclude directories that the linker is known to search.  */
+  if (linker
+      && IS_DIR_SEPARATOR (path[0])
+      && ((cp - path == 6
+	   && strncmp (path + 1, "lib", 3) == 0)
+	  || (cp - path == 10
+	      && strncmp (path + 1, "usr", 3) == 0
+	      && IS_DIR_SEPARATOR (path[4])
+	      && strncmp (path + 5, "lib", 3) == 0)))
+    return 0;
+
+  return (stat (path, &st) >= 0 && S_ISDIR (st.st_mode));
+}
+
+/* Set up the various global variables to indicate that we're processing
+   the input file named FILENAME.  */
+
+void
+set_input (const char *filename)
+{
+  const char *p;
+
+  input_filename = filename;
+  input_filename_length = strlen (input_filename);
+
+  input_basename = input_filename;
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+  /* Skip drive name so 'x:foo' is handled properly.  */
+  if (input_basename[1] == ':')
+    input_basename += 2;
+#endif
+  for (p = input_basename; *p; p++)
+    if (IS_DIR_SEPARATOR (*p))
+      input_basename = p + 1;
+
+  /* Find a suffix starting with the last period,
+     and set basename_length to exclude that suffix.  */
+  basename_length = strlen (input_basename);
+  suffixed_basename_length = basename_length;
+  p = input_basename + basename_length;
+  while (p != input_basename && *p != '.')
+    --p;
+  if (*p == '.' && p != input_basename)
+    {
+      basename_length = p - input_basename;
+      input_suffix = p + 1;
+    }
+  else
+    input_suffix = "";
+
+  /* If a spec for 'g', 'u', or 'U' is seen with -save-temps then
+     we will need to do a stat on the input_filename.  The
+     INPUT_STAT_SET signals that the stat is needed.  */
+  input_stat_set = 0;
+}
+
+/* On fatal signals, delete all the temporary files.  */
+
+static void
+fatal_error (int signum)
+{
+  signal (signum, SIG_DFL);
+  delete_failure_queue ();
+  delete_temp_files ();
+  /* Get the same signal again, this time not handled,
+     so its normal effect occurs.  */
+  kill (getpid (), signum);
+}
+
+extern int main (int, char **);
+
+int
+main (int argc, char **argv)
+{
+  size_t i;
+  int value;
+  int linker_was_run = 0;
+  int lang_n_infiles = 0;
+  int num_linker_inputs = 0;
+  char *explicit_link_files;
+  char *specs_file;
+  const char *p;
+  struct user_specs *uptr;
+  char **old_argv = argv;
+
+  /* Initialize here, not in definition.  The IRIX 6 O32 cc sometimes chokes
+     on ?: in file-scope variable initializations.  */
+  asm_debug = ASM_DEBUG_SPEC;
+
+  p = argv[0] + strlen (argv[0]);
+  while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
+    --p;
+  programname = p;
+
+  xmalloc_set_program_name (programname);
+
+  expandargv (&argc, &argv);
+
+  /* Determine if any expansions were made.  */
+  if (argv != old_argv)
+    at_file_supplied = true;
+
+  prune_options (&argc, &argv);
+
+#ifdef GCC_DRIVER_HOST_INITIALIZATION
+  /* Perform host dependent initialization when needed.  */
+  GCC_DRIVER_HOST_INITIALIZATION;
+#endif
+
+  /* Unlock the stdio streams.  */
+  unlock_std_streams ();
+
+  gcc_init_libintl ();
+
+  if (signal (SIGINT, SIG_IGN) != SIG_IGN)
+    signal (SIGINT, fatal_error);
+#ifdef SIGHUP
+  if (signal (SIGHUP, SIG_IGN) != SIG_IGN)
+    signal (SIGHUP, fatal_error);
+#endif
+  if (signal (SIGTERM, SIG_IGN) != SIG_IGN)
+    signal (SIGTERM, fatal_error);
+#ifdef SIGPIPE
+  if (signal (SIGPIPE, SIG_IGN) != SIG_IGN)
+    signal (SIGPIPE, fatal_error);
+#endif
+#ifdef SIGCHLD
+  /* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
+     receive the signal.  A different setting is inheritable */
+  signal (SIGCHLD, SIG_DFL);
+#endif
+
+  /* Allocate the argument vector.  */
+  alloc_args ();
+
+  obstack_init (&obstack);
+
+  /* Build multilib_select, et. al from the separate lines that make up each
+     multilib selection.  */
+  {
+    const char *const *q = multilib_raw;
+    int need_space;
+
+    obstack_init (&multilib_obstack);
+    while ((p = *q++) != (char *) 0)
+      obstack_grow (&multilib_obstack, p, strlen (p));
+
+    obstack_1grow (&multilib_obstack, 0);
+    multilib_select = XOBFINISH (&multilib_obstack, const char *);
+
+    q = multilib_matches_raw;
+    while ((p = *q++) != (char *) 0)
+      obstack_grow (&multilib_obstack, p, strlen (p));
+
+    obstack_1grow (&multilib_obstack, 0);
+    multilib_matches = XOBFINISH (&multilib_obstack, const char *);
+
+    q = multilib_exclusions_raw;
+    while ((p = *q++) != (char *) 0)
+      obstack_grow (&multilib_obstack, p, strlen (p));
+
+    obstack_1grow (&multilib_obstack, 0);
+    multilib_exclusions = XOBFINISH (&multilib_obstack, const char *);
+
+    need_space = FALSE;
+    for (i = 0; i < ARRAY_SIZE (multilib_defaults_raw); i++)
+      {
+	if (need_space)
+	  obstack_1grow (&multilib_obstack, ' ');
+	obstack_grow (&multilib_obstack,
+		      multilib_defaults_raw[i],
+		      strlen (multilib_defaults_raw[i]));
+	need_space = TRUE;
+      }
+
+    obstack_1grow (&multilib_obstack, 0);
+    multilib_defaults = XOBFINISH (&multilib_obstack, const char *);
+  }
+
+  /* Set up to remember the pathname of gcc and any options
+     needed for collect.  We use argv[0] instead of programname because
+     we need the complete pathname.  */
+  obstack_init (&collect_obstack);
+  obstack_grow (&collect_obstack, "COLLECT_GCC=", sizeof ("COLLECT_GCC=") - 1);
+  obstack_grow (&collect_obstack, argv[0], strlen (argv[0]) + 1);
+  xputenv (XOBFINISH (&collect_obstack, char *));
+
+#ifdef INIT_ENVIRONMENT
+  /* Set up any other necessary machine specific environment variables.  */
+  xputenv (INIT_ENVIRONMENT);
+#endif
+
+  /* Make a table of what switches there are (switches, n_switches).
+     Make a table of specified input files (infiles, n_infiles).
+     Decode switches that are handled locally.  */
+
+  process_command (argc, (const char **) argv);
+
+  /* Initialize the vector of specs to just the default.
+     This means one element containing 0s, as a terminator.  */
+
+  compilers = XNEWVAR (struct compiler, sizeof default_compilers);
+  memcpy (compilers, default_compilers, sizeof default_compilers);
+  n_compilers = n_default_compilers;
+
+  /* Read specs from a file if there is one.  */
+
+  machine_suffix = concat (spec_machine, dir_separator_str,
+			   spec_version, dir_separator_str, NULL);
+  just_machine_suffix = concat (spec_machine, dir_separator_str, NULL);
+
+  specs_file = find_a_file (&startfile_prefixes, "specs", R_OK, true);
+  /* Read the specs file unless it is a default one.  */
+  if (specs_file != 0 && strcmp (specs_file, "specs"))
+    read_specs (specs_file, TRUE);
+  else
+    init_spec ();
+
+  /* We need to check standard_exec_prefix/just_machine_suffix/specs
+     for any override of as, ld and libraries.  */
+  specs_file = (char *) alloca (strlen (standard_exec_prefix)
+		       + strlen (just_machine_suffix) + sizeof ("specs"));
+
+  strcpy (specs_file, standard_exec_prefix);
+  strcat (specs_file, just_machine_suffix);
+  strcat (specs_file, "specs");
+  if (access (specs_file, R_OK) == 0)
+    read_specs (specs_file, TRUE);
+
+  /* Process any configure-time defaults specified for the command line
+     options, via OPTION_DEFAULT_SPECS.  */
+  for (i = 0; i < ARRAY_SIZE (option_default_specs); i++)
+    do_option_spec (option_default_specs[i].name,
+		    option_default_specs[i].spec);
+
+  /* Process DRIVER_SELF_SPECS, adding any new options to the end
+     of the command line.  */
+
+  for (i = 0; i < ARRAY_SIZE (driver_self_specs); i++)
+    do_self_spec (driver_self_specs[i]);
+
+  /* If not cross-compiling, look for executables in the standard
+     places.  */
+  if (*cross_compile == '0')
+    {
+      if (*md_exec_prefix)
+	{
+	  add_prefix (&exec_prefixes, md_exec_prefix, "GCC",
+		      PREFIX_PRIORITY_LAST, 0, 0);
+	}
+    }
+
+  /* Process sysroot_suffix_spec.  */
+  if (*sysroot_suffix_spec != 0
+      && do_spec_2 (sysroot_suffix_spec) == 0)
+    {
+      if (argbuf_index > 1)
+        error ("spec failure: more than one arg to SYSROOT_SUFFIX_SPEC");
+      else if (argbuf_index == 1)
+        target_sysroot_suffix = xstrdup (argbuf[argbuf_index -1]);
+    }
+
+#ifdef HAVE_LD_SYSROOT
+  /* Pass the --sysroot option to the linker, if it supports that.  If
+     there is a sysroot_suffix_spec, it has already been processed by
+     this point, so target_system_root really is the system root we
+     should be using.  */
+  if (target_system_root)
+    {
+      obstack_grow (&obstack, "%(sysroot_spec) ", strlen ("%(sysroot_spec) "));
+      obstack_grow0 (&obstack, link_spec, strlen (link_spec));
+      set_spec ("link", XOBFINISH (&obstack, const char *));
+    }
+#endif
+
+  /* Process sysroot_hdrs_suffix_spec.  */
+  if (*sysroot_hdrs_suffix_spec != 0
+      && do_spec_2 (sysroot_hdrs_suffix_spec) == 0)
+    {
+      if (argbuf_index > 1)
+        error ("spec failure: more than one arg to SYSROOT_HEADERS_SUFFIX_SPEC");
+      else if (argbuf_index == 1)
+        target_sysroot_hdrs_suffix = xstrdup (argbuf[argbuf_index -1]);
+    }
+
+  /* Look for startfiles in the standard places.  */
+  if (*startfile_prefix_spec != 0
+      && do_spec_2 (startfile_prefix_spec) == 0
+      && do_spec_1 (" ", 0, NULL) == 0)
+    {
+      int ndx;
+      for (ndx = 0; ndx < argbuf_index; ndx++)
+	add_sysrooted_prefix (&startfile_prefixes, argbuf[ndx], "BINUTILS",
+			      PREFIX_PRIORITY_LAST, 0, 1);
+    }
+  /* We should eventually get rid of all these and stick to
+     startfile_prefix_spec exclusively.  */
+  else if (*cross_compile == '0' || target_system_root)
+    {
+      if (*md_startfile_prefix)
+	add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix,
+			      "GCC", PREFIX_PRIORITY_LAST, 0, 1);
+
+      if (*md_startfile_prefix_1)
+	add_sysrooted_prefix (&startfile_prefixes, md_startfile_prefix_1,
+			      "GCC", PREFIX_PRIORITY_LAST, 0, 1);
+
+      /* If standard_startfile_prefix is relative, base it on
+	 standard_exec_prefix.  This lets us move the installed tree
+	 as a unit.  If GCC_EXEC_PREFIX is defined, base
+	 standard_startfile_prefix on that as well.
+
+         If the prefix is relative, only search it for native compilers;
+         otherwise we will search a directory containing host libraries.  */
+      if (IS_ABSOLUTE_PATH (standard_startfile_prefix))
+	add_sysrooted_prefix (&startfile_prefixes,
+			      standard_startfile_prefix, "BINUTILS",
+			      PREFIX_PRIORITY_LAST, 0, 1);
+      else if (*cross_compile == '0')
+	{
+	  add_prefix (&startfile_prefixes,
+		      concat (gcc_exec_prefix 
+			      ? gcc_exec_prefix : standard_exec_prefix, 
+			      machine_suffix, 
+			      standard_startfile_prefix, NULL),
+		      NULL, PREFIX_PRIORITY_LAST, 0, 1);
+	}
+
+      /* Sysrooted prefixes are relocated because target_system_root is
+	 also relocated by gcc_exec_prefix.  */
+      if (*standard_startfile_prefix_1)
+ 	add_sysrooted_prefix (&startfile_prefixes,
+			      standard_startfile_prefix_1, "BINUTILS",
+			      PREFIX_PRIORITY_LAST, 0, 1);
+      if (*standard_startfile_prefix_2)
+	add_sysrooted_prefix (&startfile_prefixes,
+			      standard_startfile_prefix_2, "BINUTILS",
+			      PREFIX_PRIORITY_LAST, 0, 1);
+    }
+
+  /* Process any user specified specs in the order given on the command
+     line.  */
+  for (uptr = user_specs_head; uptr; uptr = uptr->next)
+    {
+      char *filename = find_a_file (&startfile_prefixes, uptr->filename,
+				    R_OK, true);
+      read_specs (filename ? filename : uptr->filename, FALSE);
+    }
+
+  /* If we have a GCC_EXEC_PREFIX envvar, modify it for cpp's sake.  */
+  if (gcc_exec_prefix)
+    gcc_exec_prefix = concat (gcc_exec_prefix, spec_machine, dir_separator_str,
+			      spec_version, dir_separator_str, NULL);
+
+  /* Now we have the specs.
+     Set the `valid' bits for switches that match anything in any spec.  */
+
+  validate_all_switches ();
+
+  /* Now that we have the switches and the specs, set
+     the subdirectory based on the options.  */
+  set_multilib_dir ();
+
+  /* Warn about any switches that no pass was interested in.  */
+
+  for (i = 0; (int) i < n_switches; i++)
+    if (! switches[i].validated)
+      error ("unrecognized option '-%s'", switches[i].part1);
+
+  /* Obey some of the options.  */
+
+  if (print_search_dirs)
+    {
+      printf (_("install: %s%s\n"),
+	      gcc_exec_prefix ? gcc_exec_prefix : standard_exec_prefix,
+	      gcc_exec_prefix ? "" : machine_suffix);
+      printf (_("programs: %s\n"),
+	      build_search_list (&exec_prefixes, "", false, false));
+      printf (_("libraries: %s\n"),
+	      build_search_list (&startfile_prefixes, "", false, true));
+      return (0);
+    }
+
+  if (print_file_name)
+    {
+      printf ("%s\n", find_file (print_file_name));
+      return (0);
+    }
+
+  if (print_prog_name)
+    {
+      char *newname = find_a_file (&exec_prefixes, print_prog_name, X_OK, 0);
+      printf ("%s\n", (newname ? newname : print_prog_name));
+      return (0);
+    }
+
+  if (print_multi_lib)
+    {
+      print_multilib_info ();
+      return (0);
+    }
+
+  if (print_multi_directory)
+    {
+      if (multilib_dir == NULL)
+	printf (".\n");
+      else
+	printf ("%s\n", multilib_dir);
+      return (0);
+    }
+
+  if (print_sysroot)
+    {
+      if (target_system_root)
+	{
+          if (target_sysroot_suffix)
+	    printf ("%s%s\n", target_system_root, target_sysroot_suffix);
+          else
+	    printf ("%s\n", target_system_root);
+	}
+      return (0);
+    }
+
+  if (print_multi_os_directory)
+    {
+      if (multilib_os_dir == NULL)
+	printf (".\n");
+      else
+	printf ("%s\n", multilib_os_dir);
+      return (0);
+    }
+
+  if (print_sysroot_headers_suffix)
+    {
+      if (*sysroot_hdrs_suffix_spec)
+	{
+	  printf("%s\n", (target_sysroot_hdrs_suffix
+			  ? target_sysroot_hdrs_suffix
+			  : ""));
+	  return (0);
+	}
+      else
+	/* The error status indicates that only one set of fixed
+	   headers should be built.  */
+	fatal ("not configured with sysroot headers suffix");
+    }
+
+  if (print_help_list)
+    {
+      display_help ();
+
+      if (! verbose_flag)
+	{
+	  printf (_("\nFor bug reporting instructions, please see:\n"));
+	  printf ("%s.\n", bug_report_url);
+
+	  return (0);
+	}
+
+      /* We do not exit here.  Instead we have created a fake input file
+	 called 'help-dummy' which needs to be compiled, and we pass this
+	 on the various sub-processes, along with the --help switch.
+	 Ensure their output appears after ours.  */
+      fputc ('\n', stdout);
+      fflush (stdout);
+    }
+
+  if (verbose_flag)
+    {
+      int n;
+      const char *thrmod;
+
+      notice ("Target: %s\n", spec_machine);
+      notice ("Configured with: %s\n", configuration_arguments);
+
+#ifdef THREAD_MODEL_SPEC
+      /* We could have defined THREAD_MODEL_SPEC to "%*" by default,
+	 but there's no point in doing all this processing just to get
+	 thread_model back.  */
+      obstack_init (&obstack);
+      do_spec_1 (THREAD_MODEL_SPEC, 0, thread_model);
+      obstack_1grow (&obstack, '\0');
+      thrmod = XOBFINISH (&obstack, const char *);
+#else
+      thrmod = thread_model;
+#endif
+
+      notice ("Thread model: %s\n", thrmod);
+
+      /* compiler_version is truncated at the first space when initialized
+	 from version string, so truncate version_string at the first space
+	 before comparing.  */
+      for (n = 0; version_string[n]; n++)
+	if (version_string[n] == ' ')
+	  break;
+
+      if (! strncmp (version_string, compiler_version, n)
+	  && compiler_version[n] == 0)
+	notice ("gcc version %s %s\n", version_string, pkgversion_string);
+      else
+	notice ("gcc driver version %s %sexecuting gcc version %s\n",
+		version_string, pkgversion_string, compiler_version);
+
+      if (n_infiles == 0)
+	return (0);
+    }
+
+  if (n_infiles == added_libraries)
+    fatal ("no input files");
+
+  /* Make a place to record the compiler output file names
+     that correspond to the input files.  */
+
+  i = n_infiles;
+  i += lang_specific_extra_outfiles;
+  outfiles = XCNEWVEC (const char *, i);
+
+  /* Record which files were specified explicitly as link input.  */
+
+  explicit_link_files = XCNEWVEC (char, n_infiles);
+
+  if (combine_flag)
+    combine_inputs = true;
+  else
+    combine_inputs = false;
+
+  for (i = 0; (int) i < n_infiles; i++)
+    {
+      const char *name = infiles[i].name;
+      struct compiler *compiler = lookup_compiler (name,
+						   strlen (name),
+						   infiles[i].language);
+
+      if (compiler && !(compiler->combinable))
+	combine_inputs = false;
+
+      if (lang_n_infiles > 0 && compiler != input_file_compiler
+	  && infiles[i].language && infiles[i].language[0] != '*')
+	infiles[i].incompiler = compiler;
+      else if (compiler)
+	{
+	  lang_n_infiles++;
+	  input_file_compiler = compiler;
+	  infiles[i].incompiler = compiler;
+	}
+      else
+	{
+	  /* Since there is no compiler for this input file, assume it is a
+	     linker file.  */
+	  explicit_link_files[i] = 1;
+	  infiles[i].incompiler = NULL;
+	}
+      infiles[i].compiled = false;
+      infiles[i].preprocessed = false;
+    }
+
+  if (!combine_inputs && have_c && have_o && lang_n_infiles > 1)
+   fatal ("cannot specify -o with -c or -S with multiple files");
+
+  if (combine_flag && save_temps_flag)
+    {
+      bool save_combine_inputs = combine_inputs;
+      /* Must do a separate pre-processing pass for C & Objective-C files, to
+	 obtain individual .i files.  */
+
+      combine_inputs = false;
+      for (i = 0; (int) i < n_infiles; i++)
+	{
+	  int this_file_error = 0;
+
+	  input_file_number = i;
+	  set_input (infiles[i].name);
+	  if (infiles[i].incompiler
+	      && (infiles[i].incompiler)->needs_preprocessing)
+	    input_file_compiler = infiles[i].incompiler;
+	  else
+	    continue;
+
+	  if (input_file_compiler)
+	    {
+	      if (input_file_compiler->spec[0] == '#')
+		{
+		  error ("%s: %s compiler not installed on this system",
+			 input_filename, &input_file_compiler->spec[1]);
+		  this_file_error = 1;
+		}
+	      else
+		{
+		  value = do_spec (input_file_compiler->spec);
+		  infiles[i].preprocessed = true;
+		  if (!have_o_argbuf_index)
+		    fatal ("spec '%s' is invalid", input_file_compiler->spec);
+		  infiles[i].name = argbuf[have_o_argbuf_index];
+		  infiles[i].incompiler
+		    = lookup_compiler (infiles[i].name,
+				       strlen (infiles[i].name),
+				       infiles[i].language);
+
+		  if (value < 0)
+		    this_file_error = 1;
+		}
+	    }
+
+	  if (this_file_error)
+	    {
+	      delete_failure_queue ();
+	      error_count++;
+	      break;
+	    }
+	  clear_failure_queue ();
+	}
+      combine_inputs = save_combine_inputs;
+    }
+
+  for (i = 0; (int) i < n_infiles; i++)
+    {
+      int this_file_error = 0;
+
+      /* Tell do_spec what to substitute for %i.  */
+
+      input_file_number = i;
+      set_input (infiles[i].name);
+
+      if (infiles[i].compiled)
+	continue;
+
+      /* Use the same thing in %o, unless cp->spec says otherwise.  */
+
+      outfiles[i] = input_filename;
+
+      /* Figure out which compiler from the file's suffix.  */
+
+      if (! combine_inputs)
+	input_file_compiler
+	  = lookup_compiler (infiles[i].name, input_filename_length,
+			     infiles[i].language);
+      else
+	input_file_compiler = infiles[i].incompiler;
+
+      if (input_file_compiler)
+	{
+	  /* Ok, we found an applicable compiler.  Run its spec.  */
+
+	  if (input_file_compiler->spec[0] == '#')
+	    {
+	      error ("%s: %s compiler not installed on this system",
+		     input_filename, &input_file_compiler->spec[1]);
+	      this_file_error = 1;
+	    }
+	  else
+	    {
+	      value = do_spec (input_file_compiler->spec);
+	      infiles[i].compiled = true;
+	      if (value < 0)
+		this_file_error = 1;
+	    }
+	}
+
+      /* If this file's name does not contain a recognized suffix,
+	 record it as explicit linker input.  */
+
+      else
+	explicit_link_files[i] = 1;
+
+      /* Clear the delete-on-failure queue, deleting the files in it
+	 if this compilation failed.  */
+
+      if (this_file_error)
+	{
+	  delete_failure_queue ();
+	  error_count++;
+	}
+      /* If this compilation succeeded, don't delete those files later.  */
+      clear_failure_queue ();
+    }
+
+  /* Reset the input file name to the first compile/object file name, for use
+     with %b in LINK_SPEC. We use the first input file that we can find
+     a compiler to compile it instead of using infiles.language since for
+     languages other than C we use aliases that we then lookup later.  */
+  if (n_infiles > 0)
+    {
+      int i;
+
+      for (i = 0; i < n_infiles ; i++)
+	if (infiles[i].language && infiles[i].language[0] != '*')
+	  {
+	    set_input (infiles[i].name);
+	    break;
+	  }
+    }
+
+  if (error_count == 0)
+    {
+      /* Make sure INPUT_FILE_NUMBER points to first available open
+	 slot.  */
+      input_file_number = n_infiles;
+      if (lang_specific_pre_link ())
+	error_count++;
+    }
+
+  /* Determine if there are any linker input files.  */
+  num_linker_inputs = 0;
+  for (i = 0; (int) i < n_infiles; i++)
+    if (explicit_link_files[i] || outfiles[i] != NULL)
+      num_linker_inputs++;
+
+  /* Run ld to link all the compiler output files.  */
+
+  if (num_linker_inputs > 0 && error_count == 0 && print_subprocess_help < 2)
+    {
+      int tmp = execution_count;
+
+      /* We'll use ld if we can't find collect2.  */
+      if (! strcmp (linker_name_spec, "collect2"))
+	{
+	  char *s = find_a_file (&exec_prefixes, "collect2", X_OK, false);
+	  if (s == NULL)
+	    linker_name_spec = "ld";
+	}
+      /* Rebuild the COMPILER_PATH and LIBRARY_PATH environment variables
+	 for collect.  */
+      putenv_from_prefixes (&exec_prefixes, "COMPILER_PATH", false);
+      putenv_from_prefixes (&startfile_prefixes, LIBRARY_PATH_ENV, true);
+
+      if (print_subprocess_help == 1)
+	{
+	  printf (_("\nLinker options\n==============\n\n"));
+	  printf (_("Use \"-Wl,OPTION\" to pass \"OPTION\""
+		    " to the linker.\n\n"));
+	  fflush (stdout);
+	}
+      value = do_spec (link_command_spec);
+      if (value < 0)
+	error_count = 1;
+      linker_was_run = (tmp != execution_count);
+    }
+
+  /* If options said don't run linker,
+     complain about input files to be given to the linker.  */
+
+  if (! linker_was_run && error_count == 0)
+    for (i = 0; (int) i < n_infiles; i++)
+      if (explicit_link_files[i]
+	  && !(infiles[i].language && infiles[i].language[0] == '*'))
+	error ("%s: linker input file unused because linking not done",
+	       outfiles[i]);
+
+  /* Delete some or all of the temporary files we made.  */
+
+  if (error_count)
+    delete_failure_queue ();
+  delete_temp_files ();
+
+  if (print_help_list)
+    {
+      printf (("\nFor bug reporting instructions, please see:\n"));
+      printf ("%s\n", bug_report_url);
+    }
+
+  return (signal_count != 0 ? 2
+	  : error_count > 0 ? (pass_exit_codes ? greatest_status : 1)
+	  : 0);
+}
+
+/* Find the proper compilation spec for the file name NAME,
+   whose length is LENGTH.  LANGUAGE is the specified language,
+   or 0 if this file is to be passed to the linker.  */
+
+static struct compiler *
+lookup_compiler (const char *name, size_t length, const char *language)
+{
+  struct compiler *cp;
+
+  /* If this was specified by the user to be a linker input, indicate that.  */
+  if (language != 0 && language[0] == '*')
+    return 0;
+
+  /* Otherwise, look for the language, if one is spec'd.  */
+  if (language != 0)
+    {
+      for (cp = compilers + n_compilers - 1; cp >= compilers; cp--)
+	if (cp->suffix[0] == '@' && !strcmp (cp->suffix + 1, language))
+	  return cp;
+
+      error ("language %s not recognized", language);
+      return 0;
+    }
+
+  /* Look for a suffix.  */
+  for (cp = compilers + n_compilers - 1; cp >= compilers; cp--)
+    {
+      if (/* The suffix `-' matches only the file name `-'.  */
+	  (!strcmp (cp->suffix, "-") && !strcmp (name, "-"))
+	  || (strlen (cp->suffix) < length
+	      /* See if the suffix matches the end of NAME.  */
+	      && !strcmp (cp->suffix,
+			  name + length - strlen (cp->suffix))
+	 ))
+	break;
+    }
+
+#if defined (OS2) ||defined (HAVE_DOS_BASED_FILE_SYSTEM)
+  /* Look again, but case-insensitively this time.  */
+  if (cp < compilers)
+    for (cp = compilers + n_compilers - 1; cp >= compilers; cp--)
+      {
+	if (/* The suffix `-' matches only the file name `-'.  */
+	    (!strcmp (cp->suffix, "-") && !strcmp (name, "-"))
+	    || (strlen (cp->suffix) < length
+		/* See if the suffix matches the end of NAME.  */
+		&& ((!strcmp (cp->suffix,
+			     name + length - strlen (cp->suffix))
+		     || !strpbrk (cp->suffix, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"))
+		    && !strcasecmp (cp->suffix,
+				    name + length - strlen (cp->suffix)))
+	   ))
+	  break;
+      }
+#endif
+
+  if (cp >= compilers)
+    {
+      if (cp->spec[0] != '@')
+	/* A non-alias entry: return it.  */
+	return cp;
+
+      /* An alias entry maps a suffix to a language.
+	 Search for the language; pass 0 for NAME and LENGTH
+	 to avoid infinite recursion if language not found.  */
+      return lookup_compiler (NULL, 0, cp->spec + 1);
+    }
+  return 0;
+}
+
+static char *
+save_string (const char *s, int len)
+{
+  char *result = XNEWVEC (char, len + 1);
+
+  memcpy (result, s, len);
+  result[len] = 0;
+  return result;
+}
+
+void
+pfatal_with_name (const char *name)
+{
+  perror_with_name (name);
+  delete_temp_files ();
+  exit (1);
+}
+
+static void
+perror_with_name (const char *name)
+{
+  error ("%s: %s", name, xstrerror (errno));
+}
+
+/* Output an error message and exit.  */
+
+void
+fancy_abort (const char *file, int line, const char *func)
+{
+  fatal_ice ("internal gcc abort in %s, at %s:%d", func, file, line);
+}
+
+/* Output an error message and exit.  */
+
+void
+fatal_ice (const char *cmsgid, ...)
+{
+  va_list ap;
+
+  va_start (ap, cmsgid);
+
+  fprintf (stderr, "%s: ", programname);
+  vfprintf (stderr, _(cmsgid), ap);
+  va_end (ap);
+  fprintf (stderr, "\n");
+  delete_temp_files ();
+  exit (pass_exit_codes ? ICE_EXIT_CODE : 1);
+}
+
+void
+fatal (const char *cmsgid, ...)
+{
+  va_list ap;
+
+  va_start (ap, cmsgid);
+
+  fprintf (stderr, "%s: ", programname);
+  vfprintf (stderr, _(cmsgid), ap);
+  va_end (ap);
+  fprintf (stderr, "\n");
+  delete_temp_files ();
+  exit (1);
+}
+
+/* The argument is actually c-format, not gcc-internal-format,
+   but because functions with identical names are used through
+   the rest of the compiler with gcc-internal-format, we just
+   need to hope all users of these functions use the common
+   subset between c-format and gcc-internal-format.  */
+
+void
+error (const char *gmsgid, ...)
+{
+  va_list ap;
+
+  va_start (ap, gmsgid);
+  fprintf (stderr, "%s: ", programname);
+  vfprintf (stderr, _(gmsgid), ap);
+  va_end (ap);
+
+  fprintf (stderr, "\n");
+}
+
+static void
+notice (const char *cmsgid, ...)
+{
+  va_list ap;
+
+  va_start (ap, cmsgid);
+  vfprintf (stderr, _(cmsgid), ap);
+  va_end (ap);
+}
+
+static inline void
+validate_switches_from_spec (const char *spec)
+{
+  const char *p = spec;
+  char c;
+  while ((c = *p++))
+    if (c == '%' && (*p == '{' || *p == '<' || (*p == 'W' && *++p == '{')))
+      /* We have a switch spec.  */
+      p = validate_switches (p + 1);
+}
+
+static void
+validate_all_switches (void)
+{
+  struct compiler *comp;
+  struct spec_list *spec;
+
+  for (comp = compilers; comp->spec; comp++)
+    validate_switches_from_spec (comp->spec);
+
+  /* Look through the linked list of specs read from the specs file.  */
+  for (spec = specs; spec; spec = spec->next)
+    validate_switches_from_spec (*spec->ptr_spec);
+
+  validate_switches_from_spec (link_command_spec);
+}
+
+/* Look at the switch-name that comes after START
+   and mark as valid all supplied switches that match it.  */
+
+static const char *
+validate_switches (const char *start)
+{
+  const char *p = start;
+  const char *atom;
+  size_t len;
+  int i;
+  bool suffix = false;
+  bool starred = false;
+
+#define SKIP_WHITE() do { while (*p == ' ' || *p == '\t') p++; } while (0)
+
+next_member:
+  SKIP_WHITE ();
+
+  if (*p == '!')
+    p++;
+
+  SKIP_WHITE ();
+  if (*p == '.' || *p == ',')
+    suffix = true, p++;
+
+  atom = p;
+  while (ISIDNUM (*p) || *p == '-' || *p == '+' || *p == '='
+	 || *p == ',' || *p == '.' || *p == '@')
+    p++;
+  len = p - atom;
+
+  if (*p == '*')
+    starred = true, p++;
+
+  SKIP_WHITE ();
+
+  if (!suffix)
+    {
+      /* Mark all matching switches as valid.  */
+      for (i = 0; i < n_switches; i++)
+	if (!strncmp (switches[i].part1, atom, len)
+	    && (starred || switches[i].part1[len] == 0))
+	  switches[i].validated = 1;
+    }
+
+  if (*p) p++;
+  if (*p && (p[-1] == '|' || p[-1] == '&'))
+    goto next_member;
+
+  if (*p && p[-1] == ':')
+    {
+      while (*p && *p != ';' && *p != '}')
+	{
+	  if (*p == '%')
+	    {
+	      p++;
+	      if (*p == '{' || *p == '<')
+		p = validate_switches (p+1);
+	      else if (p[0] == 'W' && p[1] == '{')
+		p = validate_switches (p+2);
+	    }
+	  else
+	    p++;
+	}
+
+      if (*p) p++;
+      if (*p && p[-1] == ';')
+	goto next_member;
+    }
+
+  return p;
+#undef SKIP_WHITE
+}
+
+struct mdswitchstr
+{
+  const char *str;
+  int len;
+};
+
+static struct mdswitchstr *mdswitches;
+static int n_mdswitches;
+
+/* Check whether a particular argument was used.  The first time we
+   canonicalize the switches to keep only the ones we care about.  */
+
+static int
+used_arg (const char *p, int len)
+{
+  struct mswitchstr
+  {
+    const char *str;
+    const char *replace;
+    int len;
+    int rep_len;
+  };
+
+  static struct mswitchstr *mswitches;
+  static int n_mswitches;
+  int i, j;
+
+  if (!mswitches)
+    {
+      struct mswitchstr *matches;
+      const char *q;
+      int cnt = 0;
+
+      /* Break multilib_matches into the component strings of string
+         and replacement string.  */
+      for (q = multilib_matches; *q != '\0'; q++)
+	if (*q == ';')
+	  cnt++;
+
+      matches
+	= (struct mswitchstr *) alloca ((sizeof (struct mswitchstr)) * cnt);
+      i = 0;
+      q = multilib_matches;
+      while (*q != '\0')
+	{
+	  matches[i].str = q;
+	  while (*q != ' ')
+	    {
+	      if (*q == '\0')
+		{
+		invalid_matches:
+		  fatal ("multilib spec '%s' is invalid", multilib_matches);
+		}
+	      q++;
+	    }
+	  matches[i].len = q - matches[i].str;
+
+	  matches[i].replace = ++q;
+	  while (*q != ';' && *q != '\0')
+	    {
+	      if (*q == ' ')
+		goto invalid_matches;
+	      q++;
+	    }
+	  matches[i].rep_len = q - matches[i].replace;
+	  i++;
+	  if (*q == ';')
+	    q++;
+	}
+
+      /* Now build a list of the replacement string for switches that we care
+	 about.  Make sure we allocate at least one entry.  This prevents
+	 xmalloc from calling fatal, and prevents us from re-executing this
+	 block of code.  */
+      mswitches
+	= XNEWVEC (struct mswitchstr, n_mdswitches + (n_switches ? n_switches : 1));
+      for (i = 0; i < n_switches; i++)
+	if ((switches[i].live_cond & SWITCH_IGNORE) == 0)
+	  {
+	    int xlen = strlen (switches[i].part1);
+	    for (j = 0; j < cnt; j++)
+	      if (xlen == matches[j].len
+		  && ! strncmp (switches[i].part1, matches[j].str, xlen))
+		{
+		  mswitches[n_mswitches].str = matches[j].replace;
+		  mswitches[n_mswitches].len = matches[j].rep_len;
+		  mswitches[n_mswitches].replace = (char *) 0;
+		  mswitches[n_mswitches].rep_len = 0;
+		  n_mswitches++;
+		  break;
+		}
+	  }
+
+      /* Add MULTILIB_DEFAULTS switches too, as long as they were not present
+	 on the command line nor any options mutually incompatible with
+	 them.  */
+      for (i = 0; i < n_mdswitches; i++)
+	{
+	  const char *r;
+
+	  for (q = multilib_options; *q != '\0'; q++)
+	    {
+	      while (*q == ' ')
+		q++;
+
+	      r = q;
+	      while (strncmp (q, mdswitches[i].str, mdswitches[i].len) != 0
+		     || strchr (" /", q[mdswitches[i].len]) == NULL)
+		{
+		  while (*q != ' ' && *q != '/' && *q != '\0')
+		    q++;
+		  if (*q != '/')
+		    break;
+		  q++;
+		}
+
+	      if (*q != ' ' && *q != '\0')
+		{
+		  while (*r != ' ' && *r != '\0')
+		    {
+		      q = r;
+		      while (*q != ' ' && *q != '/' && *q != '\0')
+			q++;
+
+		      if (used_arg (r, q - r))
+			break;
+
+		      if (*q != '/')
+			{
+			  mswitches[n_mswitches].str = mdswitches[i].str;
+			  mswitches[n_mswitches].len = mdswitches[i].len;
+			  mswitches[n_mswitches].replace = (char *) 0;
+			  mswitches[n_mswitches].rep_len = 0;
+			  n_mswitches++;
+			  break;
+			}
+
+		      r = q + 1;
+		    }
+		  break;
+		}
+	    }
+	}
+    }
+
+  for (i = 0; i < n_mswitches; i++)
+    if (len == mswitches[i].len && ! strncmp (p, mswitches[i].str, len))
+      return 1;
+
+  return 0;
+}
+
+static int
+default_arg (const char *p, int len)
+{
+  int i;
+
+  for (i = 0; i < n_mdswitches; i++)
+    if (len == mdswitches[i].len && ! strncmp (p, mdswitches[i].str, len))
+      return 1;
+
+  return 0;
+}
+
+/* Work out the subdirectory to use based on the options. The format of
+   multilib_select is a list of elements. Each element is a subdirectory
+   name followed by a list of options followed by a semicolon. The format
+   of multilib_exclusions is the same, but without the preceding
+   directory. First gcc will check the exclusions, if none of the options
+   beginning with an exclamation point are present, and all of the other
+   options are present, then we will ignore this completely. Passing
+   that, gcc will consider each multilib_select in turn using the same
+   rules for matching the options. If a match is found, that subdirectory
+   will be used.  */
+
+static void
+set_multilib_dir (void)
+{
+  const char *p;
+  unsigned int this_path_len;
+  const char *this_path, *this_arg;
+  const char *start, *end;
+  int not_arg;
+  int ok, ndfltok, first;
+
+  n_mdswitches = 0;
+  start = multilib_defaults;
+  while (*start == ' ' || *start == '\t')
+    start++;
+  while (*start != '\0')
+    {
+      n_mdswitches++;
+      while (*start != ' ' && *start != '\t' && *start != '\0')
+	start++;
+      while (*start == ' ' || *start == '\t')
+        start++;
+    }
+
+  if (n_mdswitches)
+    {
+      int i = 0;
+
+      mdswitches = XNEWVEC (struct mdswitchstr, n_mdswitches);
+      for (start = multilib_defaults; *start != '\0'; start = end + 1)
+	{
+	  while (*start == ' ' || *start == '\t')
+	    start++;
+
+	  if (*start == '\0')
+	    break;
+
+	  for (end = start + 1;
+	       *end != ' ' && *end != '\t' && *end != '\0'; end++)
+	    ;
+
+	  obstack_grow (&multilib_obstack, start, end - start);
+	  obstack_1grow (&multilib_obstack, 0);
+	  mdswitches[i].str = XOBFINISH (&multilib_obstack, const char *);
+	  mdswitches[i++].len = end - start;
+
+	  if (*end == '\0')
+	    break;
+	}
+    }
+
+  p = multilib_exclusions;
+  while (*p != '\0')
+    {
+      /* Ignore newlines.  */
+      if (*p == '\n')
+	{
+	  ++p;
+	  continue;
+	}
+
+      /* Check the arguments.  */
+      ok = 1;
+      while (*p != ';')
+	{
+	  if (*p == '\0')
+	    {
+	    invalid_exclusions:
+	      fatal ("multilib exclusions '%s' is invalid",
+		     multilib_exclusions);
+	    }
+
+	  if (! ok)
+	    {
+	      ++p;
+	      continue;
+	    }
+
+	  this_arg = p;
+	  while (*p != ' ' && *p != ';')
+	    {
+	      if (*p == '\0')
+		goto invalid_exclusions;
+	      ++p;
+	    }
+
+	  if (*this_arg != '!')
+	    not_arg = 0;
+	  else
+	    {
+	      not_arg = 1;
+	      ++this_arg;
+	    }
+
+	  ok = used_arg (this_arg, p - this_arg);
+	  if (not_arg)
+	    ok = ! ok;
+
+	  if (*p == ' ')
+	    ++p;
+	}
+
+      if (ok)
+	return;
+
+      ++p;
+    }
+
+  first = 1;
+  p = multilib_select;
+  while (*p != '\0')
+    {
+      /* Ignore newlines.  */
+      if (*p == '\n')
+	{
+	  ++p;
+	  continue;
+	}
+
+      /* Get the initial path.  */
+      this_path = p;
+      while (*p != ' ')
+	{
+	  if (*p == '\0')
+	    {
+	    invalid_select:
+	      fatal ("multilib select '%s' is invalid",
+		     multilib_select);
+	    }
+	  ++p;
+	}
+      this_path_len = p - this_path;
+
+      /* Check the arguments.  */
+      ok = 1;
+      ndfltok = 1;
+      ++p;
+      while (*p != ';')
+	{
+	  if (*p == '\0')
+	    goto invalid_select;
+
+	  if (! ok)
+	    {
+	      ++p;
+	      continue;
+	    }
+
+	  this_arg = p;
+	  while (*p != ' ' && *p != ';')
+	    {
+	      if (*p == '\0')
+		goto invalid_select;
+	      ++p;
+	    }
+
+	  if (*this_arg != '!')
+	    not_arg = 0;
+	  else
+	    {
+	      not_arg = 1;
+	      ++this_arg;
+	    }
+
+	  /* If this is a default argument, we can just ignore it.
+	     This is true even if this_arg begins with '!'.  Beginning
+	     with '!' does not mean that this argument is necessarily
+	     inappropriate for this library: it merely means that
+	     there is a more specific library which uses this
+	     argument.  If this argument is a default, we need not
+	     consider that more specific library.  */
+	  ok = used_arg (this_arg, p - this_arg);
+	  if (not_arg)
+	    ok = ! ok;
+
+	  if (! ok)
+	    ndfltok = 0;
+
+	  if (default_arg (this_arg, p - this_arg))
+	    ok = 1;
+
+	  if (*p == ' ')
+	    ++p;
+	}
+
+      if (ok && first)
+	{
+	  if (this_path_len != 1
+	      || this_path[0] != '.')
+	    {
+	      char *new_multilib_dir = XNEWVEC (char, this_path_len + 1);
+	      char *q;
+
+	      strncpy (new_multilib_dir, this_path, this_path_len);
+	      new_multilib_dir[this_path_len] = '\0';
+	      q = strchr (new_multilib_dir, ':');
+	      if (q != NULL)
+		*q = '\0';
+	      multilib_dir = new_multilib_dir;
+	    }
+	  first = 0;
+	}
+
+      if (ndfltok)
+	{
+	  const char *q = this_path, *end = this_path + this_path_len;
+
+	  while (q < end && *q != ':')
+	    q++;
+	  if (q < end)
+	    {
+	      char *new_multilib_os_dir = XNEWVEC (char, end - q);
+	      memcpy (new_multilib_os_dir, q + 1, end - q - 1);
+	      new_multilib_os_dir[end - q - 1] = '\0';
+	      multilib_os_dir = new_multilib_os_dir;
+	      break;
+	    }
+	}
+
+      ++p;
+    }
+
+  if (multilib_dir == NULL && multilib_os_dir != NULL
+      && strcmp (multilib_os_dir, ".") == 0)
+    {
+      free (CONST_CAST (char *, multilib_os_dir));
+      multilib_os_dir = NULL;
+    }
+  else if (multilib_dir != NULL && multilib_os_dir == NULL)
+    multilib_os_dir = multilib_dir;
+}
+
+/* Print out the multiple library subdirectory selection
+   information.  This prints out a series of lines.  Each line looks
+   like SUBDIRECTORY;@OPTION@OPTION, with as many options as is
+   required.  Only the desired options are printed out, the negative
+   matches.  The options are print without a leading dash.  There are
+   no spaces to make it easy to use the information in the shell.
+   Each subdirectory is printed only once.  This assumes the ordering
+   generated by the genmultilib script. Also, we leave out ones that match
+   the exclusions.  */
+
+static void
+print_multilib_info (void)
+{
+  const char *p = multilib_select;
+  const char *last_path = 0, *this_path;
+  int skip;
+  unsigned int last_path_len = 0;
+
+  while (*p != '\0')
+    {
+      skip = 0;
+      /* Ignore newlines.  */
+      if (*p == '\n')
+	{
+	  ++p;
+	  continue;
+	}
+
+      /* Get the initial path.  */
+      this_path = p;
+      while (*p != ' ')
+	{
+	  if (*p == '\0')
+	    {
+	    invalid_select:
+	      fatal ("multilib select '%s' is invalid", multilib_select);
+	    }
+
+	  ++p;
+	}
+
+      /* When --disable-multilib was used but target defines
+	 MULTILIB_OSDIRNAMES, entries starting with .: are there just
+	 to find multilib_os_dir, so skip them from output.  */
+      if (this_path[0] == '.' && this_path[1] == ':')
+	skip = 1;
+
+      /* Check for matches with the multilib_exclusions. We don't bother
+         with the '!' in either list. If any of the exclusion rules match
+         all of its options with the select rule, we skip it.  */
+      {
+	const char *e = multilib_exclusions;
+	const char *this_arg;
+
+	while (*e != '\0')
+	  {
+	    int m = 1;
+	    /* Ignore newlines.  */
+	    if (*e == '\n')
+	      {
+		++e;
+		continue;
+	      }
+
+	    /* Check the arguments.  */
+	    while (*e != ';')
+	      {
+		const char *q;
+		int mp = 0;
+
+		if (*e == '\0')
+		  {
+		  invalid_exclusion:
+		    fatal ("multilib exclusion '%s' is invalid",
+			   multilib_exclusions);
+		  }
+
+		if (! m)
+		  {
+		    ++e;
+		    continue;
+		  }
+
+		this_arg = e;
+
+		while (*e != ' ' && *e != ';')
+		  {
+		    if (*e == '\0')
+		      goto invalid_exclusion;
+		    ++e;
+		  }
+
+		q = p + 1;
+		while (*q != ';')
+		  {
+		    const char *arg;
+		    int len = e - this_arg;
+
+		    if (*q == '\0')
+		      goto invalid_select;
+
+		    arg = q;
+
+		    while (*q != ' ' && *q != ';')
+		      {
+			if (*q == '\0')
+			  goto invalid_select;
+			++q;
+		      }
+
+		    if (! strncmp (arg, this_arg,
+				   (len < q - arg) ? q - arg : len)
+			|| default_arg (this_arg, e - this_arg))
+		      {
+			mp = 1;
+			break;
+		      }
+
+		    if (*q == ' ')
+		      ++q;
+		  }
+
+		if (! mp)
+		  m = 0;
+
+		if (*e == ' ')
+		  ++e;
+	      }
+
+	    if (m)
+	      {
+		skip = 1;
+		break;
+	      }
+
+	    if (*e != '\0')
+	      ++e;
+	  }
+      }
+
+      if (! skip)
+	{
+	  /* If this is a duplicate, skip it.  */
+	  skip = (last_path != 0
+		  && (unsigned int) (p - this_path) == last_path_len
+		  && ! strncmp (last_path, this_path, last_path_len));
+
+	  last_path = this_path;
+	  last_path_len = p - this_path;
+	}
+
+      /* If this directory requires any default arguments, we can skip
+	 it.  We will already have printed a directory identical to
+	 this one which does not require that default argument.  */
+      if (! skip)
+	{
+	  const char *q;
+
+	  q = p + 1;
+	  while (*q != ';')
+	    {
+	      const char *arg;
+
+	      if (*q == '\0')
+		goto invalid_select;
+
+	      if (*q == '!')
+		arg = NULL;
+	      else
+		arg = q;
+
+	      while (*q != ' ' && *q != ';')
+		{
+		  if (*q == '\0')
+		    goto invalid_select;
+		  ++q;
+		}
+
+	      if (arg != NULL
+		  && default_arg (arg, q - arg))
+		{
+		  skip = 1;
+		  break;
+		}
+
+	      if (*q == ' ')
+		++q;
+	    }
+	}
+
+      if (! skip)
+	{
+	  const char *p1;
+
+	  for (p1 = last_path; p1 < p && *p1 != ':'; p1++)
+	    putchar (*p1);
+	  putchar (';');
+	}
+
+      ++p;
+      while (*p != ';')
+	{
+	  int use_arg;
+
+	  if (*p == '\0')
+	    goto invalid_select;
+
+	  if (skip)
+	    {
+	      ++p;
+	      continue;
+	    }
+
+	  use_arg = *p != '!';
+
+	  if (use_arg)
+	    putchar ('@');
+
+	  while (*p != ' ' && *p != ';')
+	    {
+	      if (*p == '\0')
+		goto invalid_select;
+	      if (use_arg)
+		putchar (*p);
+	      ++p;
+	    }
+
+	  if (*p == ' ')
+	    ++p;
+	}
+
+      if (! skip)
+	{
+	  /* If there are extra options, print them now.  */
+	  if (multilib_extra && *multilib_extra)
+	    {
+	      int print_at = TRUE;
+	      const char *q;
+
+	      for (q = multilib_extra; *q != '\0'; q++)
+		{
+		  if (*q == ' ')
+		    print_at = TRUE;
+		  else
+		    {
+		      if (print_at)
+			putchar ('@');
+		      putchar (*q);
+		      print_at = FALSE;
+		    }
+		}
+	    }
+
+	  putchar ('\n');
+	}
+
+      ++p;
+    }
+}
+
+/* getenv built-in spec function.
+
+   Returns the value of the environment variable given by its first
+   argument, concatenated with the second argument.  If the
+   environment variable is not defined, a fatal error is issued.  */
+
+static const char *
+getenv_spec_function (int argc, const char **argv)
+{
+  char *value;
+  char *result;
+  char *ptr;
+  size_t len;
+
+  if (argc != 2)
+    return NULL;
+
+  value = getenv (argv[0]);
+  if (!value)
+    fatal ("environment variable \"%s\" not defined", argv[0]);
+
+  /* We have to escape every character of the environment variable so
+     they are not interpreted as active spec characters.  A
+     particularly painful case is when we are reading a variable
+     holding a windows path complete with \ separators.  */
+  len = strlen (value) * 2 + strlen (argv[1]) + 1;
+  result = XNEWVAR (char, len);
+  for (ptr = result; *value; ptr += 2)
+    {
+      ptr[0] = '\\';
+      ptr[1] = *value++;
+    }
+  
+  strcpy (ptr, argv[1]);
+  
+  return result;
+}
+
+/* if-exists built-in spec function.
+
+   Checks to see if the file specified by the absolute pathname in
+   ARGS exists.  Returns that pathname if found.
+
+   The usual use for this function is to check for a library file
+   (whose name has been expanded with %s).  */
+
+static const char *
+if_exists_spec_function (int argc, const char **argv)
+{
+  /* Must have only one argument.  */
+  if (argc == 1 && IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK))
+    return argv[0];
+
+  return NULL;
+}
+
+/* if-exists-else built-in spec function.
+
+   This is like if-exists, but takes an additional argument which
+   is returned if the first argument does not exist.  */
+
+static const char *
+if_exists_else_spec_function (int argc, const char **argv)
+{
+  /* Must have exactly two arguments.  */
+  if (argc != 2)
+    return NULL;
+
+  if (IS_ABSOLUTE_PATH (argv[0]) && ! access (argv[0], R_OK))
+    return argv[0];
+
+  return argv[1];
+}
+
+/* replace-outfile built-in spec function.
+
+   This looks for the first argument in the outfiles array's name and
+   replaces it with the second argument.  */
+
+static const char *
+replace_outfile_spec_function (int argc, const char **argv)
+{
+  int i;
+  /* Must have exactly two arguments.  */
+  if (argc != 2)
+    abort ();
+
+  for (i = 0; i < n_infiles; i++)
+    {
+      if (outfiles[i] && !strcmp (outfiles[i], argv[0]))
+	outfiles[i] = xstrdup (argv[1]);
+    }
+  return NULL;
+}
+
+/* Given two version numbers, compares the two numbers.
+   A version number must match the regular expression
+   ([1-9][0-9]*|0)(\.([1-9][0-9]*|0))*
+*/
+static int
+compare_version_strings (const char *v1, const char *v2)
+{
+  int rresult;
+  regex_t r;
+
+  if (regcomp (&r, "^([1-9][0-9]*|0)(\\.([1-9][0-9]*|0))*$",
+	       REG_EXTENDED | REG_NOSUB) != 0)
+    abort ();
+  rresult = regexec (&r, v1, 0, NULL, 0);
+  if (rresult == REG_NOMATCH)
+    fatal ("invalid version number `%s'", v1);
+  else if (rresult != 0)
+    abort ();
+  rresult = regexec (&r, v2, 0, NULL, 0);
+  if (rresult == REG_NOMATCH)
+    fatal ("invalid version number `%s'", v2);
+  else if (rresult != 0)
+    abort ();
+
+  return strverscmp (v1, v2);
+}
+
+
+/* version_compare built-in spec function.
+
+   This takes an argument of the following form:
+
+   <comparison-op> <arg1> [<arg2>] <switch> <result>
+
+   and produces "result" if the comparison evaluates to true,
+   and nothing if it doesn't.
+
+   The supported <comparison-op> values are:
+
+   >=  true if switch is a later (or same) version than arg1
+   !>  opposite of >=
+   <   true if switch is an earlier version than arg1
+   !<  opposite of <
+   ><  true if switch is arg1 or later, and earlier than arg2
+   <>  true if switch is earlier than arg1 or is arg2 or later
+
+   If the switch is not present, the condition is false unless
+   the first character of the <comparison-op> is '!'.
+
+   For example,
+   %:version-compare(>= 10.3 mmacosx-version-min= -lmx)
+   adds -lmx if -mmacosx-version-min=10.3.9 was passed.  */
+
+static const char *
+version_compare_spec_function (int argc, const char **argv)
+{
+  int comp1, comp2;
+  size_t switch_len;
+  const char *switch_value = NULL;
+  int nargs = 1, i;
+  bool result;
+
+  if (argc < 3)
+    fatal ("too few arguments to %%:version-compare");
+  if (argv[0][0] == '\0')
+    abort ();
+  if ((argv[0][1] == '<' || argv[0][1] == '>') && argv[0][0] != '!')
+    nargs = 2;
+  if (argc != nargs + 3)
+    fatal ("too many arguments to %%:version-compare");
+
+  switch_len = strlen (argv[nargs + 1]);
+  for (i = 0; i < n_switches; i++)
+    if (!strncmp (switches[i].part1, argv[nargs + 1], switch_len)
+	&& check_live_switch (i, switch_len))
+      switch_value = switches[i].part1 + switch_len;
+
+  if (switch_value == NULL)
+    comp1 = comp2 = -1;
+  else
+    {
+      comp1 = compare_version_strings (switch_value, argv[1]);
+      if (nargs == 2)
+	comp2 = compare_version_strings (switch_value, argv[2]);
+      else
+	comp2 = -1;  /* This value unused.  */
+    }
+
+  switch (argv[0][0] << 8 | argv[0][1])
+    {
+    case '>' << 8 | '=':
+      result = comp1 >= 0;
+      break;
+    case '!' << 8 | '<':
+      result = comp1 >= 0 || switch_value == NULL;
+      break;
+    case '<' << 8:
+      result = comp1 < 0;
+      break;
+    case '!' << 8 | '>':
+      result = comp1 < 0 || switch_value == NULL;
+      break;
+    case '>' << 8 | '<':
+      result = comp1 >= 0 && comp2 < 0;
+      break;
+    case '<' << 8 | '>':
+      result = comp1 < 0 || comp2 >= 0;
+      break;
+
+    default:
+      fatal ("unknown operator '%s' in %%:version-compare", argv[0]);
+    }
+  if (! result)
+    return NULL;
+
+  return argv[nargs + 2];
+}
+
+/* %:include builtin spec function.  This differs from %include in that it
+   can be nested inside a spec, and thus be conditionalized.  It takes
+   one argument, the filename, and looks for it in the startfile path.
+   The result is always NULL, i.e. an empty expansion.  */
+
+static const char *
+include_spec_function (int argc, const char **argv)
+{
+  char *file;
+
+  if (argc != 1)
+    abort ();
+
+  file = find_a_file (&startfile_prefixes, argv[0], R_OK, true);
+  read_specs (file ? file : argv[0], FALSE);
+
+  return NULL;
+}
+
+/* %:print-asm-header spec function.  Print a banner to say that the
+   following output is from the assembler.  */
+
+static const char *
+print_asm_header_spec_function (int arg ATTRIBUTE_UNUSED,
+				const char **argv ATTRIBUTE_UNUSED)
+{
+  printf (_("Assembler options\n=================\n\n"));
+  printf (_("Use \"-Wa,OPTION\" to pass \"OPTION\" to the assembler.\n\n"));
+  fflush (stdout);
+  return NULL;
+}