--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/mips/iris6.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,145 @@
+/* Definitions of target machine for GNU compiler.  IRIX version 6.
+   Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000, 2001, 2002, 2003, 2004,
+   2005, 2006, 2007, 2008
+   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/>.  */
+
+/* Allow some special handling for IRIX 6.  */
+#undef TARGET_IRIX6
+#define TARGET_IRIX6 1
+
+/* Default to -mabi=n32 and -mips3.  */
+#undef MULTILIB_DEFAULTS
+#define MULTILIB_DEFAULTS { "mabi=n32" }
+
+/* Force the default ABI onto the command line in order to make the specs
+   easier to write.  Default to the mips2 ISA for the O32 ABI.  */
+#undef DRIVER_SELF_SPECS
+#define DRIVER_SELF_SPECS 			\
+  "%{!mabi=*: -mabi=n32}", 			\
+  "%{mabi=32: %{!mips*: %{!march*: -mips2}}}", 	\
+  /* Configuration-independent MIPS rules.  */	\
+  BASE_DRIVER_SELF_SPECS
+
+/* Force the generation of dwarf .debug_frame sections even if not
+   compiling -g.  This guarantees that we can unwind the stack.  */
+#define DWARF2_FRAME_INFO 1
+
+/* The system unwinder in libexc requires a specific dwarf return address
+   column to work.  */
+#undef  DWARF_FRAME_RETURN_COLUMN
+#define DWARF_FRAME_RETURN_COLUMN (FP_REG_LAST + 1)
+
+#undef MACHINE_TYPE
+#define MACHINE_TYPE "SGI running IRIX 6.x"
+
+#ifdef IRIX_USING_GNU_LD
+#define IRIX_SUBTARGET_LINK_SPEC \
+  "%{mabi=32: -melf32bsmip}%{mabi=n32: -melf32bmipn32}%{mabi=64: -melf64bmip}"
+#else
+  /* Explicitly hide crt symbols that would normally be marked with
+     a "hidden" visibility attribute.
+     
+     We have traditionally disabled this attribute when using the
+     native linker because the native linker's visibility support is
+     not fully-compatible with the GNU linker's.  In particular, the
+     native linker does not pull in archive objects purely to resolve
+     references to the object's hidden symbols, whereas the GNU
+     linker does.
+     
+     The gcc build system currently hides symbols in some static
+     libraries (typically libgcov.a or libgcc.a) whenever visibility
+     attributes are supported.  On targets with GNU semantics, this
+     makes sure that uses of libx.so symbols in one dynamic object are
+     not resolved to libx.a symbols in another dynamic object.  But
+     on targets with IRIX semantics, hiding the symbols prevents the
+     static archive from working at all.
+     
+     It would probably be better to enable visiblity attributes for
+     IRIX ld and disable the static archives versioning.  It shouldn't
+     make anything worse, since libx.a symbols are global by default
+     anyway.  However, no-one has volunteered to do this yet.  */
+
+#define IRIX_SUBTARGET_LINK_SPEC \
+  "%{w} -_SYSTYPE_SVR4 -woff 131 \
+   %{shared:-hidden_symbol __dso_handle} \
+   %{mabi=32: -32}%{mabi=n32: -n32}%{mabi=64: -64}%{!mabi*: -n32}"
+#endif
+
+/* Profiling is supported via libprof1.a not -lc_p as in IRIX 3.  */
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  "%{!shared: \
+     %{mabi=32:%{pg:gcrt1.o%s} \
+       %{!pg:%{p:mcrt1.o%s libprof1.a%s}%{!p:crt1.o%s}}} \
+     %{mabi=n32: \
+       %{mips4:%{pg:/usr/lib32/mips4/gcrt1.o%s} \
+         %{!pg:%{p:/usr/lib32/mips4/mcrt1.o%s /usr/lib32/mips4/libprof1.a%s} \
+           %{!p:/usr/lib32/mips4/crt1.o%s}}} \
+       %{!mips4:%{pg:/usr/lib32/mips3/gcrt1.o%s} \
+         %{!pg:%{p:/usr/lib32/mips3/mcrt1.o%s /usr/lib32/mips3/libprof1.a%s} \
+           %{!p:/usr/lib32/mips3/crt1.o%s}}}} \
+     %{mabi=64: \
+       %{mips4:%{pg:/usr/lib64/mips4/gcrt1.o} \
+         %{!pg:%{p:/usr/lib64/mips4/mcrt1.o /usr/lib64/mips4/libprof1.a} \
+           %{!p:/usr/lib64/mips4/crt1.o}}} \
+       %{!mips4:%{pg:/usr/lib64/mips3/gcrt1.o} \
+         %{!pg:%{p:/usr/lib64/mips3/mcrt1.o /usr/lib64/mips3/libprof1.a} \
+           %{!p:/usr/lib64/mips3/crt1.o}}}}} \
+  irix-crti.o%s crtbegin.o%s"
+
+#ifdef IRIX_USING_GNU_LD
+#define SUBTARGET_DONT_WARN_UNUSED_SPEC ""
+#define SUBTARGET_WARN_UNUSED_SPEC ""
+#else
+#define SUBTARGET_DONT_WARN_UNUSED_SPEC "-dont_warn_unused"
+#define SUBTARGET_WARN_UNUSED_SPEC "-warn_unused"
+#endif
+
+#undef LIB_SPEC
+#define LIB_SPEC \
+  "%{mabi=n32: %{mips4:-L/usr/lib32/mips4} %{!mips4:-L/usr/lib32/mips3} \
+     -L/usr/lib32} \
+   %{mabi=64: %{mips4:-L/usr/lib64/mips4} %{!mips4:-L/usr/lib64/mips3} \
+     -L/usr/lib64} \
+   %{!shared:" \
+     SUBTARGET_DONT_WARN_UNUSED_SPEC \
+     " %{pthread:-lpthread} %{p:libprof1.a%s}%{pg:libprof1.a%s} -lc " \
+     SUBTARGET_WARN_UNUSED_SPEC "}"
+
+/* Avoid getting two warnings for libgcc.a everytime we link.  libgcc.a
+   contains references to copysignl, so link with libm to resolve them.  */
+#undef LIBGCC_SPEC
+#define LIBGCC_SPEC \
+  SUBTARGET_DONT_WARN_UNUSED_SPEC " -lgcc -lm " SUBTARGET_WARN_UNUSED_SPEC
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC \
+  "crtend.o%s irix-crtn.o%s \
+   %{!shared: \
+     %{mabi=32:crtn.o%s}\
+     %{mabi=n32:%{mips4:/usr/lib32/mips4/crtn.o%s}\
+       %{!mips4:/usr/lib32/mips3/crtn.o%s}}\
+     %{mabi=64:%{mips4:/usr/lib64/mips4/crtn.o%s}\
+       %{!mips4:/usr/lib64/mips3/crtn.o%s}}}"
+
+#define MIPS_TFMODE_FORMAT mips_extended_format
+
+#undef SUBTARGET_CPP_SPEC
+#define SUBTARGET_CPP_SPEC "%{pthread:-D_REENTRANT}"
+