1/* Specific flags and argument handling of the C front-end.
2   Copyright (C) 1999-2020 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