gcc/gccspec.c

   1 /* Specific flags and argument handling of the C front-end.
   2    Copyright (C) 1999, 2001 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "tm.h"
  25 #include "gcc.h"
  26
  27 /* Filter argc and argv before processing by the gcc driver proper.  */
  28 void
  29 lang_specific_driver (in_argc, in_argv, in_added_libraries)
  30      int *in_argc ATTRIBUTE_UNUSED;
  31      const char *const **in_argv ATTRIBUTE_UNUSED;
  32      int *in_added_libraries ATTRIBUTE_UNUSED;
  33 {
  34 #ifdef ENABLE_SHARED_LIBGCC
  35   int i;
  36
  37   /* The new argument list will be contained in this.  */
  38   const char **arglist;
  39
  40   /* True if we should add -shared-libgcc to the command-line.  */
  41   int shared_libgcc = 0;
  42
  43   /* The total number of arguments with the new stuff.  */
  44   int argc;
  45
  46   /* The argument list.  */
  47   const char *const *argv;
  48
  49   argc = *in_argc;
  50   argv = *in_argv;
  51
  52   for (i = 1; i < argc; i++)
  53     {
  54       if (argv[i][0] == '-')
  55         {
  56           if (strcmp (argv[i], "-static-libgcc") == 0
  57               || strcmp (argv[i], "-static") == 0)
  58             return;
  59         }
  60       else
  61         {
  62           int len;
  63
  64           /* If the filename ends in .m or .mi, we are compiling ObjC
  65              and want to pass -shared-libgcc.  */
  66           len = strlen (argv[i]);
  67           if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm')
  68               ||  (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm'
  69                    && argv[i][len - 1] == 'i'))
  70             shared_libgcc = 1;
  71         }
  72     }
  73
  74   if  (shared_libgcc)
  75     {
  76       /* Make sure to have room for the trailing NULL argument.  */
  77       arglist = (const char **) xmalloc ((argc+2) * sizeof (char *));
  78
  79       i = 0;
  80       do
  81         {
  82           arglist[i] = argv[i];
  83           i++;
  84         }
  85       while (i < argc);
  86
  87       arglist[i++] = "-shared-libgcc";
  88
  89       arglist[i] = NULL;
  90
  91       *in_argc = i;
  92       *in_argv = arglist;
  93     }
  94 #endif
  95 }
  96
  97 /* Called before linking.  Returns 0 on success and -1 on failure.  */
  98 int
  99 lang_specific_pre_link ()
 100 {
 101   return 0;  /* Not used for C.  */
 102 }
 103
 104 /* Number of extra output files that lang_specific_pre_link may generate.  */
 105 int lang_specific_extra_outfiles = 0;  /* Not used for C.  */
 106
 107 /* Table of language-specific spec functions.  */
 108 const struct spec_function lang_specific_spec_functions[] =
 109 {
 110   { 0, 0 }
 111 };