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 "gcc.h"
  24
  25 /* Filter argc and argv before processing by the gcc driver proper.  */
  26 void
  27 lang_specific_driver (in_argc, in_argv, in_added_libraries)
  28      int *in_argc ATTRIBUTE_UNUSED;
  29      const char *const **in_argv ATTRIBUTE_UNUSED;
  30      int *in_added_libraries ATTRIBUTE_UNUSED;
  31 {
  32 #ifdef ENABLE_SHARED_LIBGCC
  33   int i;
  34
  35   /* The new argument list will be contained in this.  */
  36   const char **arglist;
  37
  38   /* True if we should add -shared-libgcc to the command-line.  */
  39   int shared_libgcc = 0;
  40
  41   /* The total number of arguments with the new stuff.  */
  42   int argc;
  43
  44   /* The argument list.  */
  45   const char *const *argv;
  46
  47   argc = *in_argc;
  48   argv = *in_argv;
  49
  50   for (i = 1; i < argc; i++)
  51     {
  52       if (argv[i][0] == '-')
  53         {
  54           if (strcmp (argv[i], "-static-libgcc") == 0
  55               || strcmp (argv[i], "-static") == 0)
  56             return;
  57         }
  58       else
  59         {
  60           int len;
  61
  62           /* If the filename ends in .m or .mi, we are compiling ObjC
  63              and want to pass -shared-libgcc.  */
  64           len = strlen (argv[i]);
  65           if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm')
  66               ||  (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm'
  67                    && argv[i][len - 1] == 'i'))
  68             shared_libgcc = 1;
  69         }
  70     }
  71
  72   if  (shared_libgcc)
  73     {
  74       /* Make sure to have room for the trailing NULL argument.  */
  75       arglist = (const char **) xmalloc ((argc+2) * sizeof (char *));
  76
  77       i = 0;
  78       do
  79         {
  80           arglist[i] = argv[i];
  81           i++;
  82         }
  83       while (i < argc);
  84
  85       arglist[i++] = "-shared-libgcc";
  86
  87       arglist[i] = NULL;
  88
  89       *in_argc = i;
  90       *in_argv = arglist;
  91     }
  92 #endif
  93 }
  94
  95 /* Called before linking.  Returns 0 on success and -1 on failure.  */
  96 int
  97 lang_specific_pre_link ()
  98 {
  99   return 0;  /* Not used for C.  */
 100 }
 101
 102 /* Number of extra output files that lang_specific_pre_link may generate.  */
 103 int lang_specific_extra_outfiles = 0;  /* Not used for C.  */