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annotate gcc/gccspec.c @ 97:4d6300120c29 cbc-gcc-4.6.0

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modify condition of tail call in expand_call method
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Fri, 20 Jan 2012 04:48:59 +0900
parents f6334be47118
children
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1 /* Specific flags and argument handling of the C front-end.
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2 Copyright (C) 1999, 2001, 2003, 2007, 2010 Free Software Foundation, Inc.
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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 "gcc.h"
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25 #include "opts.h"
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27 /* Filter command line before processing by the gcc driver proper. */
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28 void
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29 lang_specific_driver (struct cl_decoded_option **in_decoded_options ATTRIBUTE_UNUSED,
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30 unsigned int *in_decoded_options_count ATTRIBUTE_UNUSED,
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31 int *in_added_libraries ATTRIBUTE_UNUSED)
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32 {
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33 /* Systems which use the NeXT runtime by default should arrange
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34 for the shared libgcc to be used when -fgnu-runtime is passed
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35 through specs. */
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36 #if defined(ENABLE_SHARED_LIBGCC) && ! defined(NEXT_OBJC_RUNTIME)
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37 unsigned int i;
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39 /* The new argument list will be contained in this. */
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40 struct cl_decoded_option *new_decoded_options;
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42 /* True if we should add -shared-libgcc to the command-line. */
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43 int shared_libgcc = 0;
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44
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45 /* The total number of arguments with the new stuff. */
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46 unsigned int argc;
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48 /* The argument list. */
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49 struct cl_decoded_option *decoded_options;
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50
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51 argc = *in_decoded_options_count;
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52 decoded_options = *in_decoded_options;
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54 for (i = 1; i < argc; i++)
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55 {
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56 switch (decoded_options[i].opt_index)
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57 {
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58 case OPT_static_libgcc:
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59 case OPT_static:
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60 return;
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62 case OPT_SPECIAL_input_file:
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63 {
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64 const char *file = decoded_options[i].arg;
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65 int len;
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67 /* If the filename ends in .m or .mi, we are compiling
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68 ObjC and want to pass -shared-libgcc. */
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69 len = strlen (file);
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70 if ((len > 2 && file[len - 2] == '.' && file[len - 1] == 'm')
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71 || (len > 3 && file[len - 3] == '.' && file[len - 2] == 'm'
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72 && file[len - 1] == 'i'))
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73 shared_libgcc = 1;
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74 }
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75 break;
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76 }
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77 }
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78
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79 if (shared_libgcc)
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80 {
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81 new_decoded_options = XNEWVEC (struct cl_decoded_option, argc + 1);
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82
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83 i = 0;
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84 do
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85 {
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86 new_decoded_options[i] = decoded_options[i];
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87 i++;
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88 }
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89 while (i < argc);
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90
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91 generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER,
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92 &new_decoded_options[i++]);
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94 *in_decoded_options_count = i;
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95 *in_decoded_options = new_decoded_options;
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96 }
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97 #endif
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98 }
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99
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100 /* Called before linking. Returns 0 on success and -1 on failure. */
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101 int
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102 lang_specific_pre_link (void)
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103 {
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104 return 0; /* Not used for C. */
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105 }
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106
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107 /* Number of extra output files that lang_specific_pre_link may generate. */
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108 int lang_specific_extra_outfiles = 0; /* Not used for C. */