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1 /* Specific flags and argument handling of the C front-end.
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2 Copyright (C) 1999, 2001, 2003, 2007 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "tm.h"
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24 #include "gcc.h"
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25
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26 /* Filter argc and argv before processing by the gcc driver proper. */
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27 void
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28 lang_specific_driver (int *in_argc ATTRIBUTE_UNUSED,
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29 const char *const **in_argv ATTRIBUTE_UNUSED,
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30 int *in_added_libraries ATTRIBUTE_UNUSED)
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31 {
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32 /* Systems which use the NeXT runtime by default should arrange
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33 for the shared libgcc to be used when -fgnu-runtime is passed
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34 through specs. */
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35 #if defined(ENABLE_SHARED_LIBGCC) && ! defined(NEXT_OBJC_RUNTIME)
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36 int i;
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37
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38 /* The new argument list will be contained in this. */
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39 const char **arglist;
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40
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41 /* True if we should add -shared-libgcc to the command-line. */
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42 int shared_libgcc = 0;
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43
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44 /* The total number of arguments with the new stuff. */
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45 int argc;
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46
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47 /* The argument list. */
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48 const char *const *argv;
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49
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50 argc = *in_argc;
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51 argv = *in_argv;
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52
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53 for (i = 1; i < argc; i++)
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54 {
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55 if (argv[i][0] == '-')
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56 {
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57 if (strcmp (argv[i], "-static-libgcc") == 0
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58 || strcmp (argv[i], "-static") == 0)
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59 return;
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60 }
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61 else
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62 {
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63 int len;
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64
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65 /* If the filename ends in .m or .mi, we are compiling ObjC
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66 and want to pass -shared-libgcc. */
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67 len = strlen (argv[i]);
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68 if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm')
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69 || (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm'
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70 && argv[i][len - 1] == 'i'))
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71 shared_libgcc = 1;
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72 }
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73 }
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74
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75 if (shared_libgcc)
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76 {
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77 /* Make sure to have room for the trailing NULL argument. */
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78 arglist = XNEWVEC (const char *, argc + 2);
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79
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80 i = 0;
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81 do
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82 {
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83 arglist[i] = argv[i];
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84 i++;
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85 }
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86 while (i < argc);
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87
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88 arglist[i++] = "-shared-libgcc";
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89
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90 arglist[i] = NULL;
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91
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92 *in_argc = i;
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93 *in_argv = arglist;
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94 }
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95 #endif
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96 }
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97
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98 /* Called before linking. Returns 0 on success and -1 on failure. */
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99 int
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100 lang_specific_pre_link (void)
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101 {
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102 return 0; /* Not used for C. */
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103 }
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104
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105 /* Number of extra output files that lang_specific_pre_link may generate. */
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106 int lang_specific_extra_outfiles = 0; /* Not used for C. */
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