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111
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1 /* Specific flags and argument handling of the C front-end.
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145
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2 Copyright (C) 1999-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "tm.h"
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24 #include "opts.h"
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25
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26 /* Filter command line before processing by the gcc driver proper. */
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27 void
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28 lang_specific_driver (struct cl_decoded_option **in_decoded_options ATTRIBUTE_UNUSED,
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29 unsigned int *in_decoded_options_count ATTRIBUTE_UNUSED,
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30 int *in_added_libraries ATTRIBUTE_UNUSED)
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31 {
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32 /* Systems which use the NeXT runtime by default should arrange
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33 for the shared libgcc to be used when -fgnu-runtime is passed
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34 through specs. */
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35 #if defined(ENABLE_SHARED_LIBGCC) && ! NEXT_OBJC_RUNTIME
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36 unsigned int i;
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37
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38 /* The new argument list will be contained in this. */
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39 struct cl_decoded_option *new_decoded_options;
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40
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41 /* True if we should add -shared-libgcc to the command-line. */
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42 int shared_libgcc = 0;
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43
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44 /* The total number of arguments with the new stuff. */
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45 unsigned int argc;
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46
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47 /* The argument list. */
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48 struct cl_decoded_option *decoded_options;
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49
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50 argc = *in_decoded_options_count;
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51 decoded_options = *in_decoded_options;
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52
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53 for (i = 1; i < argc; i++)
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54 {
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55 switch (decoded_options[i].opt_index)
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56 {
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57 case OPT_static_libgcc:
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58 case OPT_static:
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59 return;
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60
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61 case OPT_SPECIAL_input_file:
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62 {
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63 const char *file = decoded_options[i].arg;
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64 int len;
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65
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66 /* If the filename ends in .m or .mi, we are compiling
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67 ObjC and want to pass -shared-libgcc. */
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68 len = strlen (file);
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69 if ((len > 2 && file[len - 2] == '.' && file[len - 1] == 'm')
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70 || (len > 3 && file[len - 3] == '.' && file[len - 2] == 'm'
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71 && file[len - 1] == 'i'))
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72 shared_libgcc = 1;
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73 }
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74 break;
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75 }
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76 }
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77
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78 if (shared_libgcc)
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79 {
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80 new_decoded_options = XNEWVEC (struct cl_decoded_option, argc + 1);
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81
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82 i = 0;
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83 do
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84 {
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85 new_decoded_options[i] = decoded_options[i];
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86 i++;
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87 }
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88 while (i < argc);
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89
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90 generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER,
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91 &new_decoded_options[i++]);
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92
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93 *in_decoded_options_count = i;
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94 *in_decoded_options = new_decoded_options;
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95 }
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96 #endif
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97 }
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98
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99 /* Called before linking. Returns 0 on success and -1 on failure. */
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100 int
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101 lang_specific_pre_link (void)
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102 {
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103 return 0; /* Not used for C. */
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104 }
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105
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106 /* Number of extra output files that lang_specific_pre_link may generate. */
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107 int lang_specific_extra_outfiles = 0; /* Not used for C. */
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