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   /* Systems which use the NeXT runtime by default should arrange
  34      for the shared libgcc to be used when -fgnu-runtime is passed
  35      through specs.  */
  36 #if defined(ENABLE_SHARED_LIBGCC) && ! defined(NEXT_OBJC_RUNTIME)
  37   int i;
  38
  39   /* The new argument list will be contained in this.  */
  40   const char **arglist;
  41
  42   /* True if we should add -shared-libgcc to the command-line.  */
  43   int shared_libgcc = 0;
  44
  45   /* The total number of arguments with the new stuff.  */
  46   int argc;
  47
  48   /* The argument list.  */
  49   const char *const *argv;
  50
  51   argc = *in_argc;
  52   argv = *in_argv;
  53
  54   for (i = 1; i < argc; i++)
  55     {
  56       if (argv[i][0] == '-')
  57         {
  58           if (strcmp (argv[i], "-static-libgcc") == 0
  59               || strcmp (argv[i], "-static") == 0)
  60             return;
  61         }
  62       else
  63         {
  64           int len;
  65
  66           /* If the filename ends in .m or .mi, we are compiling ObjC
  67              and want to pass -shared-libgcc.  */
  68           len = strlen (argv[i]);
  69           if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm')
  70               ||  (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm'
  71                    && argv[i][len - 1] == 'i'))
  72             shared_libgcc = 1;
  73         }
  74     }
  75
  76   if  (shared_libgcc)
  77     {
  78       /* Make sure to have room for the trailing NULL argument.  */
  79       arglist = XNEWVEC (const char *, argc + 2);
  80
  81       i = 0;
  82       do
  83         {
  84           arglist[i] = argv[i];
  85           i++;
  86         }
  87       while (i < argc);
  88
  89       arglist[i++] = "-shared-libgcc";
  90
  91       arglist[i] = NULL;
  92
  93       *in_argc = i;
  94       *in_argv = arglist;
  95     }
  96 #endif
  97 }
  98
  99 /* Called before linking.  Returns 0 on success and -1 on failure.  */
 100 int
 101 lang_specific_pre_link (void)
 102 {
 103   return 0;  /* Not used for C.  */
 104 }
 105
 106 /* Number of extra output files that lang_specific_pre_link may generate.  */
 107 int lang_specific_extra_outfiles = 0;  /* Not used for C.  */