Mercurial > hg > CbC > CbC_gcc
annotate gcc/lto-wrapper.c @ 55:77e2b8dfacca gcc-4.4.5
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author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Fri, 12 Feb 2010 23:39:51 +0900 |
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children | b7f97abdc517 |
rev | line source |
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55
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1 /* Wrapper to call lto. Used by collect2 and the linker plugin. |
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2 Copyright (C) 2009 Free Software Foundation, Inc. |
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3 |
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4 Factored out of collect2 by Rafael Espindola <espindola@google.com> |
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5 |
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6 This file is part of GCC. |
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7 |
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8 GCC is free software; you can redistribute it and/or modify it under |
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9 the terms of the GNU General Public License as published by the Free |
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10 Software Foundation; either version 3, or (at your option) any later |
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11 version. |
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12 |
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13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
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14 WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with GCC; see the file COPYING3. If not see |
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20 <http://www.gnu.org/licenses/>. */ |
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21 |
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22 |
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23 /* This program is passed a gcc, a list of gcc arguments and a list of |
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24 object files containing IL. It scans the argument list to check if |
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25 we are in whopr mode or not modifies the arguments and needed and |
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26 prints a list of output files on stdout. |
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27 |
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28 Example: |
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29 |
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30 $ lto-wrapper gcc/xgcc -B gcc a.o b.o -o test -flto |
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31 |
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32 The above will print something like |
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33 /tmp/ccwbQ8B2.lto.o |
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34 |
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35 If -fwhopr is used instead, more than one file might be produced |
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36 ./ccXj2DTk.lto.ltrans.o |
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37 ./ccCJuXGv.lto.ltrans.o |
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38 */ |
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39 |
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40 #include "config.h" |
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41 #include "system.h" |
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42 #include "coretypes.h" |
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43 #include "tm.h" |
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44 #include "intl.h" |
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45 #include "libiberty.h" |
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46 |
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47 int debug; /* true if -debug */ |
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48 |
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49 enum lto_mode_d { |
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50 LTO_MODE_NONE, /* Not doing LTO. */ |
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51 LTO_MODE_LTO, /* Normal LTO. */ |
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52 LTO_MODE_WHOPR /* WHOPR. */ |
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53 }; |
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54 |
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55 /* Current LTO mode. */ |
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56 static enum lto_mode_d lto_mode = LTO_MODE_NONE; |
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57 |
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58 static char *ltrans_output_file; |
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59 static char *flto_out; |
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60 static char *args_name; |
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61 |
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62 static void maybe_unlink_file (const char *); |
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63 |
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64 /* Delete tempfiles and exit function. */ |
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65 |
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66 static void |
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67 lto_wrapper_exit (int status) |
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68 { |
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69 static bool cleanup_done = false; |
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70 if (!cleanup_done) |
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71 { |
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72 /* Setting cleanup_done prevents an infinite loop if one of the |
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73 calls to maybe_unlink_file fails. */ |
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74 cleanup_done = true; |
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75 |
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76 if (ltrans_output_file) |
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77 maybe_unlink_file (ltrans_output_file); |
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78 if (flto_out) |
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79 maybe_unlink_file (flto_out); |
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80 if (args_name) |
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81 maybe_unlink_file (args_name); |
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82 } |
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83 exit (status); |
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84 } |
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85 |
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86 /* Just die. CMSGID is the error message. */ |
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87 |
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88 static void __attribute__ ((format (printf, 1, 2))) |
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89 fatal (const char * cmsgid, ...) |
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90 { |
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91 va_list ap; |
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92 |
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93 va_start (ap, cmsgid); |
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94 fprintf (stderr, "lto-wrapper: "); |
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95 vfprintf (stderr, _(cmsgid), ap); |
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96 fprintf (stderr, "\n"); |
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97 va_end (ap); |
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98 |
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99 lto_wrapper_exit (FATAL_EXIT_CODE); |
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100 } |
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101 |
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102 |
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103 /* Die when sys call fails. CMSGID is the error message. */ |
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104 |
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105 static void __attribute__ ((format (printf, 1, 2))) |
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106 fatal_perror (const char *cmsgid, ...) |
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107 { |
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108 int e = errno; |
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109 va_list ap; |
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110 |
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111 va_start (ap, cmsgid); |
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parents:
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112 fprintf (stderr, "lto-wrapper: "); |
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113 vfprintf (stderr, _(cmsgid), ap); |
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114 fprintf (stderr, ": %s\n", xstrerror (e)); |
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115 va_end (ap); |
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116 |
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117 lto_wrapper_exit (FATAL_EXIT_CODE); |
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118 } |
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119 |
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120 |
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121 /* Execute a program, and wait for the reply. ARGV are the arguments. The |
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122 last one must be NULL. */ |
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123 |
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124 static struct pex_obj * |
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125 collect_execute (char **argv) |
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126 { |
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127 struct pex_obj *pex; |
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128 const char *errmsg; |
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129 int err; |
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130 |
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131 if (debug) |
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132 { |
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133 char **p_argv; |
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134 const char *str; |
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135 |
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136 for (p_argv = argv; (str = *p_argv) != (char *) 0; p_argv++) |
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137 fprintf (stderr, " %s", str); |
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138 |
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139 fprintf (stderr, "\n"); |
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140 } |
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141 |
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142 fflush (stdout); |
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143 fflush (stderr); |
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144 |
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145 pex = pex_init (0, "lto-wrapper", NULL); |
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146 if (pex == NULL) |
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147 fatal_perror ("pex_init failed"); |
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148 |
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149 errmsg = pex_run (pex, PEX_LAST | PEX_SEARCH, argv[0], argv, NULL, |
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150 NULL, &err); |
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151 if (errmsg != NULL) |
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152 { |
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153 if (err != 0) |
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154 { |
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155 errno = err; |
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156 fatal_perror (errmsg); |
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157 } |
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158 else |
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159 fatal (errmsg); |
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160 } |
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161 |
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162 return pex; |
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163 } |
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164 |
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165 |
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166 /* Wait for a process to finish, and exit if a nonzero status is found. |
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167 PROG is the program name. PEX is the process we should wait for. */ |
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168 |
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169 static int |
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170 collect_wait (const char *prog, struct pex_obj *pex) |
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|
171 { |
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172 int status; |
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173 |
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|
174 if (!pex_get_status (pex, 1, &status)) |
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175 fatal_perror ("can't get program status"); |
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176 pex_free (pex); |
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177 |
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178 if (status) |
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|
179 { |
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|
180 if (WIFSIGNALED (status)) |
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|
181 { |
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182 int sig = WTERMSIG (status); |
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|
183 if (WCOREDUMP (status)) |
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184 fatal ("%s terminated with signal %d [%s], core dumped", |
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|
185 prog, sig, strsignal (sig)); |
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|
186 else |
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187 fatal ("%s terminated with signal %d [%s]", |
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|
188 prog, sig, strsignal (sig)); |
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|
189 } |
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190 |
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|
191 if (WIFEXITED (status)) |
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|
192 fatal ("%s returned %d exit status", prog, WEXITSTATUS (status)); |
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|
193 } |
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194 |
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195 return 0; |
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|
196 } |
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197 |
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|
198 |
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|
199 /* Unlink a temporary LTRANS file unless requested otherwise. */ |
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200 |
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parents:
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|
201 static void |
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|
202 maybe_unlink_file (const char *file) |
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203 { |
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|
204 if (! debug) |
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|
205 { |
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206 if (unlink_if_ordinary (file)) |
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parents:
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|
207 fatal_perror ("deleting LTRANS file %s", file); |
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|
208 } |
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|
209 else |
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|
210 fprintf (stderr, "[Leaving LTRANS %s]\n", file); |
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|
211 } |
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212 |
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|
213 |
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|
214 /* Execute program ARGV[0] with arguments ARGV. Wait for it to finish. */ |
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215 |
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|
216 static void |
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parents:
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|
217 fork_execute (char **argv) |
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218 { |
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|
219 struct pex_obj *pex; |
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|
220 char *new_argv[3]; |
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|
221 char *at_args; |
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parents:
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|
222 FILE *args; |
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223 int status; |
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|
224 |
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parents:
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|
225 args_name = make_temp_file (".args"); |
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parents:
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|
226 at_args = concat ("@", args_name, NULL); |
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227 args = fopen (args_name, "w"); |
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228 if (args == NULL) |
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229 fatal ("failed to open %s", args_name); |
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230 |
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231 status = writeargv (&argv[1], args); |
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232 |
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233 if (status) |
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234 fatal ("could not write to temporary file %s", args_name); |
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235 |
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236 fclose (args); |
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237 |
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238 new_argv[0] = argv[0]; |
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239 new_argv[1] = at_args; |
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240 new_argv[2] = NULL; |
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241 |
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242 pex = collect_execute (new_argv); |
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243 collect_wait (new_argv[0], pex); |
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244 |
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245 maybe_unlink_file (args_name); |
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246 free (at_args); |
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247 } |
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248 |
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249 |
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250 /* Execute gcc. ARGC is the number of arguments. ARGV contains the arguments. */ |
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251 |
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252 static void |
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253 run_gcc (unsigned argc, char *argv[]) |
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254 { |
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255 unsigned i; |
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256 unsigned new_argc = argc; |
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257 const char **new_argv; |
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258 const char **argv_ptr; |
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259 char *list_option_full = NULL; |
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260 |
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261 new_argc += 8; |
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262 new_argv = (const char **) xcalloc (sizeof (char *), new_argc); |
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263 |
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264 argv_ptr = new_argv; |
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265 |
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266 *argv_ptr++ = argv[0]; |
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267 *argv_ptr++ = "-combine"; |
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268 *argv_ptr++ = "-x"; |
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269 *argv_ptr++ = "lto"; |
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270 *argv_ptr++ = "-c"; |
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271 if (lto_mode == LTO_MODE_LTO) |
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272 { |
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273 flto_out = make_temp_file (".lto.o"); |
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274 *argv_ptr++ = "-o"; |
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275 *argv_ptr++ = flto_out; |
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276 } |
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277 else if (lto_mode == LTO_MODE_WHOPR) |
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parents:
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278 { |
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279 const char *list_option = "-fltrans-output-list="; |
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parents:
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280 size_t list_option_len = strlen (list_option); |
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parents:
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281 char *tmp; |
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parents:
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282 |
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283 ltrans_output_file = make_temp_file (".ltrans.out"); |
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284 list_option_full = (char *) xmalloc (sizeof (char) * |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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285 (strlen (ltrans_output_file) + list_option_len + 1)); |
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parents:
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286 tmp = list_option_full; |
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287 |
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288 *argv_ptr++ = tmp; |
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289 strcpy (tmp, list_option); |
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290 tmp += list_option_len; |
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parents:
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291 strcpy (tmp, ltrans_output_file); |
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292 |
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293 *argv_ptr++ = "-fwpa"; |
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294 } |
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295 else |
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296 fatal ("invalid LTO mode"); |
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297 |
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298 /* Add inherited GCC options to the LTO back end command line. |
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299 Filter out some obviously inappropriate options that will |
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|
300 conflict with the options that we force above. We pass |
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301 all of the remaining options on to LTO, and let it complain |
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302 about any it doesn't like. Note that we invoke LTO via the |
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parents:
diff
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|
303 `gcc' driver, so the usual option processing takes place. |
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304 Except for `-flto' and `-fwhopr', we should only filter options that |
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parents:
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|
305 are meaningful to `ld', lest an option go silently unclaimed. */ |
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306 for (i = 1; i < argc; i++) |
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parents:
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|
307 { |
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parents:
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|
308 const char *s = argv[i]; |
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|
309 |
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|
310 if (strcmp (s, "-flto") == 0 || strcmp (s, "-fwhopr") == 0) |
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parents:
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311 /* We've handled this LTO option, don't pass it on. */ |
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parents:
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|
312 ; |
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parents:
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313 else if (*s == '-' && s[1] == 'o') |
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parents:
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|
314 { |
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parents:
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|
315 /* Drop `-o' and its filename argument. We will use a |
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parents:
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|
316 temporary file for the LTO output. The `-o' option |
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parents:
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|
317 will be interpreted by the linker. */ |
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parents:
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|
318 if (s[2] == '\0') |
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parents:
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|
319 i++; |
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parents:
diff
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|
320 } |
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parents:
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|
321 else |
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parents:
diff
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|
322 /* Pass the option or argument to LTO. */ |
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parents:
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|
323 *argv_ptr++ = s; |
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parents:
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|
324 } |
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parents:
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|
325 |
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parents:
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|
326 *argv_ptr = NULL; |
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parents:
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|
327 |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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|
328 fork_execute (CONST_CAST (char **, new_argv)); |
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parents:
diff
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|
329 free (new_argv); |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
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|
330 new_argv = NULL; |
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parents:
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|
331 |
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parents:
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|
332 if (lto_mode == LTO_MODE_LTO) |
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parents:
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|
333 { |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
334 printf("%s\n", flto_out); |
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parents:
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changeset
|
335 free (flto_out); |
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parents:
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|
336 flto_out = NULL; |
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parents:
diff
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|
337 } |
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parents:
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|
338 else if (lto_mode == LTO_MODE_WHOPR) |
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339 { |
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340 FILE *stream = fopen (ltrans_output_file, "r"); |
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341 int c; |
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342 |
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343 if (!stream) |
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344 fatal_perror ("fopen: %s", ltrans_output_file); |
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345 |
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346 while ((c = getc (stream)) != EOF) |
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347 putc (c, stdout); |
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348 fclose (stream); |
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349 maybe_unlink_file (ltrans_output_file); |
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350 free (list_option_full); |
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351 } |
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352 else |
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353 fatal ("invalid LTO mode"); |
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354 } |
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355 |
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356 |
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357 /* Parse the command line. Copy any unused argument to GCC_ARGV. ARGC is the |
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358 number of arguments. ARGV contains the arguments. */ |
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359 |
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360 static int |
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361 process_args (int argc, char *argv[], char *gcc_argv[]) |
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362 { |
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363 int i; |
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364 int j = 0; |
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365 |
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366 for (i = 1; i < argc; i ++) |
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367 { |
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368 if (! strcmp (argv[i], "-debug")) |
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369 debug = 1; |
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370 else if (! strcmp (argv[i], "-flto")) |
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371 lto_mode = LTO_MODE_LTO; |
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372 else if (! strcmp (argv[i], "-fwhopr")) |
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373 lto_mode = LTO_MODE_WHOPR; |
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374 else |
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375 { |
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376 gcc_argv[j] = argv[i]; |
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377 j++; |
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378 } |
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379 } |
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380 |
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381 return j; |
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382 } |
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383 |
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384 |
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385 /* Entry point. */ |
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386 |
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387 int |
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388 main (int argc, char *argv[]) |
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389 { |
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390 char **gcc_argv; |
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391 int gcc_argc; |
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392 |
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393 gcc_init_libintl (); |
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394 |
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395 /* We may be called with all the arguments stored in some file and |
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396 passed with @file. Expand them into argv before processing. */ |
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397 expandargv (&argc, &argv); |
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398 gcc_argv = (char **) xcalloc (sizeof (char *), argc); |
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399 gcc_argc = process_args (argc, argv, gcc_argv); |
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400 run_gcc (gcc_argc, gcc_argv); |
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401 free (gcc_argv); |
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402 |
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403 return 0; |
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404 } |