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[official-gcc.git] / gcc / gccspec.c
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1 /* Specific flags and argument handling of the C front-end.
2 Copyright (C) 1999, 2001, 2003, 2007 Free Software Foundation, Inc.
4 This file is part of GCC.
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 3, or (at your option) any later
9 version.
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.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #include "config.h"
21 #include "system.h"
22 #include "coretypes.h"
23 #include "tm.h"
24 #include "gcc.h"
26 /* Filter argc and argv before processing by the gcc driver proper. */
27 void
28 lang_specific_driver (int *in_argc ATTRIBUTE_UNUSED,
29 const char *const **in_argv ATTRIBUTE_UNUSED,
30 int *in_added_libraries ATTRIBUTE_UNUSED)
32 /* Systems which use the NeXT runtime by default should arrange
33 for the shared libgcc to be used when -fgnu-runtime is passed
34 through specs. */
35 #if defined(ENABLE_SHARED_LIBGCC) && ! defined(NEXT_OBJC_RUNTIME)
36 int i;
38 /* The new argument list will be contained in this. */
39 const char **arglist;
41 /* True if we should add -shared-libgcc to the command-line. */
42 int shared_libgcc = 0;
44 /* The total number of arguments with the new stuff. */
45 int argc;
47 /* The argument list. */
48 const char *const *argv;
50 argc = *in_argc;
51 argv = *in_argv;
53 for (i = 1; i < argc; i++)
55 if (argv[i][0] == '-')
57 if (strcmp (argv[i], "-static-libgcc") == 0
58 || strcmp (argv[i], "-static") == 0)
59 return;
61 else
63 int len;
65 /* If the filename ends in .m or .mi, we are compiling ObjC
66 and want to pass -shared-libgcc. */
67 len = strlen (argv[i]);
68 if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm')
69 || (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm'
70 && argv[i][len - 1] == 'i'))
71 shared_libgcc = 1;
75 if (shared_libgcc)
77 /* Make sure to have room for the trailing NULL argument. */
78 arglist = XNEWVEC (const char *, argc + 2);
80 i = 0;
83 arglist[i] = argv[i];
84 i++;
86 while (i < argc);
88 arglist[i++] = "-shared-libgcc";
90 arglist[i] = NULL;
92 *in_argc = i;
93 *in_argv = arglist;
95 #endif
98 /* Called before linking. Returns 0 on success and -1 on failure. */
99 int
100 lang_specific_pre_link (void)
102 return 0; /* Not used for C. */
105 /* Number of extra output files that lang_specific_pre_link may generate. */
106 int lang_specific_extra_outfiles = 0; /* Not used for C. */