gccspec.c revision 117395 
1/* Specific flags and argument handling of the C front-end.
2   Copyright (C) 1999, 2001 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify it under
7the terms of the GNU General Public License as published by the Free
8Software Foundation; either version 2, or (at your option) any later
9version.
10
11GCC is distributed in the hope that it will be useful, but WITHOUT ANY
12WARRANTY; without even the implied warranty of MERCHANTABILITY or
13FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING.  If not, write to the Free
18Software Foundation, 59 Temple Place - Suite 330, Boston, MA
1902111-1307, 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.  */
26void
27lang_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.  */
96int
97lang_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.  */
103int lang_specific_extra_outfiles = 0;  /* Not used for C.  */
104
105/* Table of language-specific spec functions.  */
106const struct spec_function lang_specific_spec_functions[] =
107{
108  { 0, 0 }
109};
110