Mercurial > hg > CbC > CbC_gcc
annotate gcc/cppspec.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | a06113de4d67 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Specific flags and argument handling of the C preprocessor. |
|
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2 Copyright (C) 1999, 2007, 2010 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 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. | |
| 10 | |
| 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. | |
| 15 | |
| 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/>. */ | |
| 19 | |
| 20 #include "config.h" | |
| 21 #include "system.h" | |
| 22 #include "coretypes.h" | |
| 23 #include "tm.h" | |
| 24 #include "gcc.h" | |
|
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25 #include "opts.h" |
| 0 | 26 |
| 27 /* The `cpp' executable installed in $(bindir) and $(cpp_install_dir) | |
| 28 is a customized version of the gcc driver. It forces -E; -S and -c | |
| 29 are errors. It defaults to -x c for files with unrecognized | |
| 30 extensions, unless -x options appear in argv, in which case we | |
| 31 assume the user knows what they're doing. If no explicit input is | |
| 32 mentioned, it will read stdin. */ | |
| 33 | |
| 34 /* Suffixes for known sorts of input files. Note that we do not list | |
| 35 files which are normally considered to have been preprocessed already, | |
| 36 since the user's expectation is that `cpp' always preprocesses. */ | |
| 37 static const char *const known_suffixes[] = | |
| 38 { | |
| 39 ".c", ".C", ".S", ".m", | |
| 40 ".cc", ".cxx", ".cpp", ".cp", ".c++", | |
| 41 ".sx", | |
| 42 NULL | |
| 43 }; | |
| 44 | |
|
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45 /* Filter the command line before processing by the gcc driver proper. */ |
| 0 | 46 void |
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47 lang_specific_driver (struct cl_decoded_option **in_decoded_options, |
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48 unsigned int *in_decoded_options_count, |
| 0 | 49 int *in_added_libraries ATTRIBUTE_UNUSED) |
| 50 { | |
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51 struct cl_decoded_option *decoded_options = *in_decoded_options; |
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52 unsigned int argc = *in_decoded_options_count; |
| 0 | 53 |
| 54 /* Do we need to read stdin? */ | |
| 55 int read_stdin = 1; | |
| 56 | |
| 57 /* Do we need to insert -E? */ | |
| 58 int need_E = 1; | |
| 59 | |
| 60 /* Have we seen an input file? */ | |
| 61 int seen_input = 0; | |
| 62 | |
| 63 /* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary. | |
| 64 0 means unnecessary. */ | |
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65 unsigned int lang_c_here = 0; |
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66 unsigned int lang_S_here = 0; |
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67 unsigned int o_here = 0; |
| 0 | 68 |
| 69 /* Do we need to fix up an input file with an unrecognized suffix? */ | |
| 70 int need_fixups = 1; | |
| 71 | |
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72 unsigned int i, j; |
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73 struct cl_decoded_option *new_decoded_options; |
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74 unsigned int new_argc; |
| 0 | 75 extern int is_cpp_driver; |
| 76 | |
| 77 is_cpp_driver = 1; | |
| 78 | |
| 79 /* First pass. If we see an -S or -c, barf. If we see an input file, | |
| 80 turn off read_stdin. If we see a second input file, it is actually | |
| 81 the output file. If we see a third input file, barf. */ | |
| 82 for (i = 1; i < argc; i++) | |
| 83 { | |
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84 switch (decoded_options[i].opt_index) |
| 0 | 85 { |
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86 case OPT_E: |
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87 need_E = 0; |
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88 break; |
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89 |
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90 case OPT_S: |
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91 case OPT_c: |
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92 fatal_error ("%qs is not a valid option to the preprocessor", |
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93 decoded_options[i].orig_option_with_args_text); |
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94 return; |
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95 |
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96 case OPT_x: |
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97 need_fixups = 0; |
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98 break; |
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99 |
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100 case OPT_SPECIAL_input_file: |
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101 { |
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102 const char *file = decoded_options[i].arg; |
| 0 | 103 |
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104 if (strcmp (file, "-") == 0) |
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105 read_stdin = 0; |
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106 else |
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107 { |
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108 seen_input++; |
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109 if (seen_input == 3) |
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110 { |
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111 fatal_error ("too many input files"); |
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112 return; |
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113 } |
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114 else if (seen_input == 2) |
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115 { |
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116 o_here = i; |
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117 } |
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118 else |
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119 { |
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120 read_stdin = 0; |
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121 if (need_fixups) |
| 0 | 122 { |
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123 int l = strlen (file); |
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124 int known = 0; |
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125 const char *const *suff; |
| 0 | 126 |
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127 for (suff = known_suffixes; *suff; suff++) |
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128 if (!strcmp (*suff, &file[l - strlen(*suff)])) |
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129 { |
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130 known = 1; |
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131 break; |
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132 } |
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133 |
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134 if (! known) |
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135 { |
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136 /* .s files are a special case; we have to |
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137 treat them like .S files so |
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138 -D__ASSEMBLER__ will be in effect. */ |
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139 if (!strcmp (".s", &file[l - 2])) |
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140 lang_S_here = i; |
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141 else |
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142 lang_c_here = i; |
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143 } |
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144 } |
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145 } |
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146 } |
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147 } |
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148 break; |
| 0 | 149 } |
| 150 } | |
| 151 | |
| 152 /* If we don't need to edit the command line, we can bail early. */ | |
| 153 | |
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154 new_argc = argc + need_E + read_stdin + !!lang_c_here + !!lang_S_here; |
| 0 | 155 |
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156 if (new_argc == argc && !o_here) |
| 0 | 157 return; |
| 158 | |
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159 new_decoded_options = XNEWVEC (struct cl_decoded_option, new_argc); |
| 0 | 160 |
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161 new_decoded_options[0] = new_decoded_options[0]; |
| 0 | 162 j = 1; |
| 163 | |
| 164 if (need_E) | |
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165 generate_option (OPT_E, NULL, 1, CL_DRIVER, &new_decoded_options[j++]); |
| 0 | 166 |
| 167 for (i = 1; i < argc; i++, j++) | |
| 168 { | |
| 169 if (i == lang_c_here) | |
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170 generate_option (OPT_x, "c", 1, CL_DRIVER, &new_decoded_options[j++]); |
| 0 | 171 else if (i == lang_S_here) |
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172 generate_option (OPT_x, "assembler-with-cpp", 1, CL_DRIVER, |
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173 &new_decoded_options[j++]); |
| 0 | 174 else if (i == o_here) |
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175 { |
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176 generate_option (OPT_o, decoded_options[i].arg, 1, CL_DRIVER, |
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177 &new_decoded_options[j]); |
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178 continue; |
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179 } |
| 0 | 180 |
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181 new_decoded_options[j] = decoded_options[i]; |
| 0 | 182 } |
| 183 | |
| 184 if (read_stdin) | |
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185 generate_option_input_file ("-", &new_decoded_options[j++]); |
| 0 | 186 |
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187 *in_decoded_options_count = new_argc; |
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188 *in_decoded_options = new_decoded_options; |
| 0 | 189 } |
| 190 | |
| 191 /* Called before linking. Returns 0 on success and -1 on failure. */ | |
| 192 int lang_specific_pre_link (void) | |
| 193 { | |
| 194 return 0; /* Not used for cpp. */ | |
| 195 } | |
| 196 | |
| 197 /* Number of extra output files that lang_specific_pre_link may generate. */ | |
| 198 int lang_specific_extra_outfiles = 0; /* Not used for cpp. */ |