gcc/gccspec.c

   1 /* Specific flags and argument handling of the C front-end.
   2    Copyright (C) 1999, 2001, 2003 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, 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301, 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 (int *in_argc ATTRIBUTE_UNUSED,
  30                       const char *const **in_argv ATTRIBUTE_UNUSED,
  31                       int *in_added_libraries ATTRIBUTE_UNUSED)
  32 {
  33 #ifdef ENABLE_SHARED_LIBGCC
  34   int i;
  35
  36   /* The new argument list will be contained in this.  */
  37   const char **arglist;
  38
  39   /* True if we should add -shared-libgcc to the command-line.  */
  40   int shared_libgcc = 0;
  41
  42   /* The total number of arguments with the new stuff.  */
  43   int argc;
  44
  45   /* The argument list.  */
  46   const char *const *argv;
  47
  48   argc = *in_argc;
  49   argv = *in_argv;
  50
  51   for (i = 1; i < argc; i++)
  52     {
  53       if (argv[i][0] == '-')
  54         {
  55           if (strcmp (argv[i], "-static-libgcc") == 0
  56               || strcmp (argv[i], "-static") == 0)
  57             return;
  58         }
  59       else
  60         {
  61           int len;
  62
  63           /* If the filename ends in .m or .mi, we are compiling ObjC
  64              and want to pass -shared-libgcc.  */
  65           len = strlen (argv[i]);
  66           if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm')
  67               ||  (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm'
  68                    && argv[i][len - 1] == 'i'))
  69             shared_libgcc = 1;
  70         }
  71     }
  72
  73   if  (shared_libgcc)
  74     {
  75       /* Make sure to have room for the trailing NULL argument.  */
  76       arglist = XNEWVEC (const char *, argc + 2);
  77
  78       i = 0;
  79       do
  80         {
  81           arglist[i] = argv[i];
  82           i++;
  83         }
  84       while (i < argc);
  85
  86       arglist[i++] = "-shared-libgcc";
  87
  88       arglist[i] = NULL;
  89
  90       *in_argc = i;
  91       *in_argv = arglist;
  92     }
  93 #endif
  94 }
  95
  96 /* Called before linking.  Returns 0 on success and -1 on failure.  */
  97 int
  98 lang_specific_pre_link (void)
  99 {
 100   return 0;  /* Not used for C.  */
 101 }
 102
 103 /* Number of extra output files that lang_specific_pre_link may generate.  */
 104 int lang_specific_extra_outfiles = 0;  /* Not used for C.  */