1/* Specific flags and argument handling of the C front-end.
2 Copyright (C) 1999-2017 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 3, 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 COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20#include "config.h"
21#include "system.h"
22#include "coretypes.h"
23#include "tm.h"
24#include "opts.h"
25
26/* Filter command line before processing by the gcc driver proper. */
27void
28lang_specific_driver (struct cl_decoded_option **in_decoded_options ATTRIBUTE_UNUSED,
29 unsigned int *in_decoded_options_count ATTRIBUTE_UNUSED,
30 int *in_added_libraries ATTRIBUTE_UNUSED)
31{
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) && ! NEXT_OBJC_RUNTIME
36 unsigned int i;
37
38 /* The new argument list will be contained in this. */
39 struct cl_decoded_option *new_decoded_options;
40
41 /* True if we should add -shared-libgcc to the command-line. */
42 int shared_libgcc = 0;
43
44 /* The total number of arguments with the new stuff. */
45 unsigned int argc;
46
47 /* The argument list. */
48 struct cl_decoded_option *decoded_options;
49
50 argc = *in_decoded_options_count;
51 decoded_options = *in_decoded_options;
52
53 for (i = 1; i < argc; i++)
54 {
55 switch (decoded_options[i].opt_index)
56 {
57 case OPT_static_libgcc:
58 case OPT_static:
59 return;
60
61 case OPT_SPECIAL_input_file:
62 {
63 const char *file = decoded_options[i].arg;
64 int len;
65
66 /* If the filename ends in .m or .mi, we are compiling
67 ObjC and want to pass -shared-libgcc. */
68 len = strlen (file);
69 if ((len > 2 && file[len - 2] == '.' && file[len - 1] == 'm')
70 || (len > 3 && file[len - 3] == '.' && file[len - 2] == 'm'
71 && file[len - 1] == 'i'))
72 shared_libgcc = 1;
73 }
74 break;
75 }
76 }
77
78 if (shared_libgcc)
79 {
80 new_decoded_options = XNEWVEC (struct cl_decoded_option, argc + 1);
81
82 i = 0;
83 do
84 {
85 new_decoded_options[i] = decoded_options[i];
86 i++;
87 }
88 while (i < argc);
89
90 generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER,
91 &new_decoded_options[i++]);
92
93 *in_decoded_options_count = i;
94 *in_decoded_options = new_decoded_options;
95 }
96#endif
97}
98
99/* Called before linking. Returns 0 on success and -1 on failure. */
100int
101lang_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. */
107int lang_specific_extra_outfiles = 0; /* Not used for C. */
108