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/* Specific flags and argument handling of the C front-end.

   Copyright (C) 1999, 2001, 2003, 2007 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License as published by the Free

Software Foundation; either version 3, or (at your option) any later

version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY

WARRANTY; without even the implied warranty of MERCHANTABILITY or

FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

for more details.

You should have received a copy of the GNU General Public License

along with GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.  */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "tm.h"

#include "gcc.h"

/* Filter argc and argv before processing by the gcc driver proper.  */

void

lang_specific_driver (int *in_argc ATTRIBUTE_UNUSED,

                      const char *const **in_argv ATTRIBUTE_UNUSED,

                      int *in_added_libraries ATTRIBUTE_UNUSED)

{

  /* Systems which use the NeXT runtime by default should arrange

     for the shared libgcc to be used when -fgnu-runtime is passed

     through specs.  */

#if defined(ENABLE_SHARED_LIBGCC) && ! defined(NEXT_OBJC_RUNTIME)

  int i;

  /* The new argument list will be contained in this.  */

  const char **arglist;

  /* True if we should add -shared-libgcc to the command-line.  */

  int shared_libgcc = 0;

  /* The total number of arguments with the new stuff.  */

  int argc;

  /* The argument list.  */

  const char *const *argv;

  argc = *in_argc;

  argv = *in_argv;

  for (i = 1; i < argc; i++)

    {

      if (argv[i][0] == '-')

        {

          if (strcmp (argv[i], "-static-libgcc") == 0

              || strcmp (argv[i], "-static") == 0)

            return;

        }

      else

        {

          int len;

          /* If the filename ends in .m or .mi, we are compiling ObjC

             and want to pass -shared-libgcc.  */

          len = strlen (argv[i]);

          if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm')

              ||  (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm'

                   && argv[i][len - 1] == 'i'))

            shared_libgcc = 1;

        }

    }

  if  (shared_libgcc)

    {

      /* Make sure to have room for the trailing NULL argument.  */

      arglist = XNEWVEC (const char *, argc + 2);

      i = 0;

      do

        {

          arglist[i] = argv[i];

          i++;

        }

      while (i < argc);

      arglist[i++] = "-shared-libgcc";

      arglist[i] = NULL;

      *in_argc = i;

      *in_argv = arglist;

    }

#endif

}

/* Called before linking.  Returns 0 on success and -1 on failure.  */

int

lang_specific_pre_link (void)

{

  return 0;  /* Not used for C.  */

}

/* Number of extra output files that lang_specific_pre_link may generate.  */

int lang_specific_extra_outfiles = 0;  /* Not used for C.  */