1 | // -*- Mode: C++ -*- |
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2 | // |
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3 | // CForall Version 1.0, Copyright (C) Peter A. Buhr 2005 |
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4 | // |
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5 | // cc1.cc -- |
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6 | // |
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7 | // Author : Richard C. Bilson |
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8 | // Created On : Fri Aug 26 14:23:51 2005 |
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9 | // Last Modified By : Peter A. Buhr |
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10 | // Last Modified On : Mon Apr 27 23:11:52 2015 |
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11 | // Update Count : 39 |
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12 | // |
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13 | |
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14 | |
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15 | #include <iostream> |
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16 | using std::cerr; |
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17 | using std::endl; |
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18 | #include <string> |
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19 | using std::string; |
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20 | #include <cstdio> // stderr, stdout, perror, fprintf |
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21 | #include <cstdlib> // getenv, exit, mkstemp |
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22 | #include <unistd.h> // execvp, fork, unlink |
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23 | #include <sys/wait.h> // wait |
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24 | |
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25 | #include "config.h" // configure info |
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26 | |
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27 | |
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28 | //#define __DEBUG_H__ |
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29 | |
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30 | |
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31 | string compiler_name( GCC_PATH ); // path/name of C compiler |
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32 | |
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33 | string D__GCC_BPREFIX__( "-D__GCC_BPREFIX__=" ); |
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34 | string D__CFA_FLAGPREFIX__( "-D__CFA_FLAG__=" ); |
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35 | |
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36 | char tmpname[] = P_tmpdir "/CFAXXXXXX"; |
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37 | int tmpfilefd = -1; |
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38 | |
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39 | |
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40 | bool prefix( string arg, string pre ) { |
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41 | return arg.substr( 0, pre.size() ) == pre; |
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42 | } // prefix |
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43 | |
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44 | |
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45 | void checkEnv( const char *args[], int &nargs ) { |
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46 | char *value; |
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47 | |
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48 | value = getenv( "__COMPILER__" ); |
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49 | if ( value != NULL ) { |
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50 | compiler_name = value; |
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51 | #ifdef __DEBUG_H__ |
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52 | cerr << "env arg:\"" << compiler_name << "\"" << endl; |
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53 | #endif // __DEBUG_H__ |
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54 | } // if |
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55 | |
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56 | value = getenv( "__GCC_MACHINE__" ); |
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57 | if ( value != NULL ) { |
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58 | args[nargs] = ( *new string( value ) ).c_str(); // pass the argument along |
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59 | #ifdef __DEBUG_H__ |
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60 | cerr << "env arg:\"" << args[nargs] << "\"" << endl; |
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61 | #endif // __DEBUG_H__ |
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62 | nargs += 1; |
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63 | } // if |
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64 | |
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65 | value = getenv( "__GCC_VERSION__" ); |
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66 | if ( value != NULL ) { |
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67 | args[nargs] = ( *new string( value ) ).c_str(); // pass the argument along |
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68 | #ifdef __DEBUG_H__ |
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69 | cerr << "env arg:\"" << args[nargs] << "\"" << endl; |
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70 | #endif // __DEBUG_H__ |
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71 | nargs += 1; |
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72 | } // if |
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73 | } // checkEnv |
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74 | |
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75 | |
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76 | void rmtmpfile() { |
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77 | if ( unlink( tmpname ) == -1 ) { // remove tmpname |
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78 | perror ( "CFA Translator error: cpp failed" ); |
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79 | exit( EXIT_FAILURE ); |
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80 | } // if |
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81 | tmpfilefd = -1; // mark closed |
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82 | } // rmtmpfile |
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83 | |
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84 | |
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85 | void sigTermHandler( int signal ) { |
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86 | if ( tmpfilefd != -1 ) { // RACE, file created ? |
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87 | rmtmpfile(); // remove |
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88 | exit( EXIT_FAILURE ); // terminate |
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89 | } // if |
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90 | } // sigTermHandler |
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91 | |
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92 | |
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93 | void Stage1( const int argc, const char * const argv[] ) { |
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94 | int code; |
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95 | int i; |
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96 | |
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97 | string arg; |
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98 | string bprefix; |
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99 | |
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100 | const char *cpp_in = NULL; |
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101 | const char *cpp_out = NULL; |
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102 | |
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103 | bool CFA_flag = false; |
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104 | bool cpp_flag = false; |
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105 | const char *o_name = NULL; |
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106 | |
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107 | const char *args[argc + 100]; // leave space for 100 additional cpp command line values |
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108 | int nargs = 1; // number of arguments in args list; 0 => command name |
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109 | const char *uargs[20]; // leave space for 20 additional cfa-cpp command line values |
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110 | int nuargs = 1; // 0 => command name |
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111 | |
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112 | signal( SIGINT, sigTermHandler ); |
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113 | signal( SIGTERM, sigTermHandler ); |
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114 | |
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115 | // process all the arguments |
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116 | |
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117 | checkEnv( args, nargs ); // arguments passed via environment variables |
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118 | |
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119 | for ( i = 1; i < argc; i += 1 ) { |
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120 | #ifdef __DEBUG_H__ |
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121 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl; |
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122 | #endif // __DEBUG_H__ |
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123 | arg = argv[i]; |
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124 | #ifdef __DEBUG_H__ |
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125 | cerr << "arg:\"" << arg << "\"" << endl; |
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126 | #endif // __DEBUG_H__ |
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127 | if ( prefix( arg, "-" ) ) { |
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128 | // strip g++ flags that are inappropriate or cause duplicates in subsequent passes |
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129 | |
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130 | if ( arg == "-quiet" ) { |
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131 | } else if ( arg == "-imultilib" || arg == "-imultiarch" ) { |
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132 | i += 1; // and the argument |
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133 | } else if ( prefix( arg, "-A" ) ) { |
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134 | } else if ( prefix( arg, "-D__GNU" ) ) { |
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135 | //******** |
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136 | // GCC 5.6.0 SEPARATED THE -D FROM THE ARGUMENT! |
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137 | //******** |
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138 | } else if ( arg == "-D" && prefix( argv[i + 1], "__GNU" ) ) { |
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139 | i += 1; // and the argument |
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140 | |
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141 | // strip flags controlling cpp step |
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142 | |
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143 | } else if ( arg == "-D__CPP__" ) { |
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144 | cpp_flag = true; |
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145 | } else if ( arg == "-D" && string( argv[i + 1] ) == "__CPP__" ) { |
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146 | i += 1; // and the argument |
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147 | cpp_flag = true; |
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148 | } else if ( arg == "-D__CFA__" ) { |
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149 | CFA_flag = true; |
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150 | } else if ( arg == "-D" && string( argv[i + 1] ) == "__CFA__" ) { |
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151 | i += 1; // and the argument |
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152 | CFA_flag = true; |
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153 | } else if ( prefix( arg, D__CFA_FLAGPREFIX__ ) ) { |
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154 | uargs[nuargs] = ( *new string( arg.substr( D__CFA_FLAGPREFIX__.size() ) ) ).c_str(); |
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155 | nuargs += 1; |
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156 | } else if ( arg == "-D" && prefix( argv[i + 1], D__CFA_FLAGPREFIX__.substr(2) ) ) { |
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157 | uargs[nuargs] = ( *new string( string( argv[i + 1] ).substr( D__CFA_FLAGPREFIX__.size() - 2 ) ) ).c_str(); |
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158 | nuargs += 1; |
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159 | i += 1; // and the argument |
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160 | } else if ( prefix( arg, D__GCC_BPREFIX__ ) ) { |
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161 | bprefix = arg.substr( D__GCC_BPREFIX__.size() ); |
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162 | } else if ( arg == "-D" && prefix( argv[i + 1], D__GCC_BPREFIX__.substr(2) ) ) { |
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163 | bprefix = string( argv[i + 1] ).substr( D__GCC_BPREFIX__.size() - 2 ); |
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164 | i += 1; // and the argument |
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165 | |
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166 | // all other flags |
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167 | |
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168 | } else if ( arg == "-o" ) { |
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169 | i += 1; |
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170 | o_name = argv[i]; |
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171 | } else { |
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172 | args[nargs] = argv[i]; // pass the flag along |
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173 | nargs += 1; |
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174 | // CPP flags with an argument |
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175 | if ( arg == "-D" || arg == "-I" || arg == "-MF" || arg == "-MT" || arg == "-MQ" || |
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176 | arg == "-include" || arg == "-imacros" || arg == "-idirafter" || arg == "-iprefix" || |
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177 | arg == "-iwithprefix" || arg == "-iwithprefixbefore" || arg == "-isystem" || arg == "-isysroot" ) { |
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178 | i += 1; |
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179 | args[nargs] = argv[i]; // pass the argument along |
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180 | nargs += 1; |
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181 | #ifdef __DEBUG_H__ |
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182 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl; |
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183 | #endif // __DEBUG_H__ |
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184 | } else if ( arg == "-MD" || arg == "-MMD" ) { |
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185 | args[nargs] = "-MF"; // insert before file |
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186 | nargs += 1; |
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187 | i += 1; |
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188 | args[nargs] = argv[i]; // pass the argument along |
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189 | nargs += 1; |
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190 | #ifdef __DEBUG_H__ |
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191 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl; |
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192 | #endif // __DEBUG_H__ |
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193 | } // if |
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194 | } // if |
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195 | } else { // obtain input and possibly output files |
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196 | if ( cpp_in == NULL ) { |
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197 | cpp_in = argv[i]; |
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198 | #ifdef __DEBUG_H__ |
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199 | cerr << "cpp_in:\"" << cpp_in << "\"" << endl; |
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200 | #endif // __DEBUG_H__ |
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201 | } else if ( cpp_out == NULL ) { |
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202 | cpp_out = argv[i]; |
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203 | #ifdef __DEBUG_H__ |
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204 | cerr << "cpp_out:\"" << cpp_out << "\""<< endl; |
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205 | #endif // __DEBUG_H__ |
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206 | } else { |
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207 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl; |
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208 | exit( EXIT_FAILURE ); |
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209 | } // if |
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210 | } // if |
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211 | } // for |
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212 | |
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213 | #ifdef __DEBUG_H__ |
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214 | cerr << "args:"; |
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215 | for ( i = 1; i < nargs; i += 1 ) { |
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216 | cerr << " " << args[i]; |
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217 | } // for |
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218 | if ( cpp_in != NULL ) cerr << " " << cpp_in; |
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219 | if ( cpp_out != NULL ) cerr << " " << cpp_out; |
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220 | cerr << endl; |
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221 | #endif // __DEBUG_H__ |
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222 | |
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223 | if ( cpp_in == NULL ) { |
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224 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl; |
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225 | exit( EXIT_FAILURE ); |
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226 | } // if |
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227 | |
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228 | if ( cpp_flag ) { |
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229 | // The -E flag is specified on the cfa command so only run the preprocessor and output is written to standard |
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230 | // output or -o. The call to cfa has a -E so it does not have to be added to the argument list. |
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231 | |
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232 | args[0] = compiler_name.c_str(); |
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233 | args[nargs] = cpp_in; |
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234 | nargs += 1; |
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235 | if ( o_name != NULL ) { // location for output |
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236 | args[nargs] = "-o"; |
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237 | nargs += 1; |
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238 | args[nargs] = o_name; |
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239 | nargs += 1; |
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240 | } // if |
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241 | args[nargs] = NULL; // terminate argument list |
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242 | |
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243 | #ifdef __DEBUG_H__ |
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244 | cerr << "nargs: " << nargs << endl; |
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245 | for ( i = 0; args[i] != NULL; i += 1 ) { |
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246 | cerr << args[i] << " "; |
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247 | } // for |
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248 | cerr << endl; |
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249 | #endif // __DEBUG_H__ |
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250 | |
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251 | execvp( args[0], (char *const *)args ); // should not return |
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252 | perror( "CFA Translator error: cpp level, execvp" ); |
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253 | exit( EXIT_FAILURE ); |
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254 | } // if |
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255 | |
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256 | // Create a temporary file to store output of the C preprocessor. |
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257 | |
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258 | tmpfilefd = mkstemp( tmpname ); |
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259 | if ( tmpfilefd == -1 ) { |
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260 | perror( "CFA Translator error: cpp level, mkstemp" ); |
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261 | exit( EXIT_FAILURE ); |
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262 | } // if |
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263 | |
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264 | #ifdef __DEBUG_H__ |
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265 | cerr << "tmpname:" << tmpname << " tmpfilefd:" << tmpfilefd << endl; |
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266 | #endif // __DEBUG_H__ |
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267 | |
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268 | // Run the C preprocessor and save the output in tmpfile. |
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269 | |
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270 | if ( fork() == 0 ) { // child process ? |
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271 | // -o xxx.ii cannot be used to write the output file from cpp because no output file is created if cpp detects |
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272 | // an error (e.g., cannot find include file). Whereas, output is always generated, even when there is an error, |
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273 | // when cpp writes to stdout. Hence, stdout is redirected into the temporary file. |
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274 | if ( freopen( tmpname, "w", stdout ) == NULL ) { // redirect stdout to tmpname |
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275 | perror( "CFA Translator error: cpp level, freopen" ); |
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276 | exit( EXIT_FAILURE ); |
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277 | } // if |
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278 | |
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279 | args[0] = compiler_name.c_str(); |
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280 | args[nargs] = cpp_in; // input to cpp |
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281 | nargs += 1; |
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282 | args[nargs] = NULL; // terminate argument list |
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283 | |
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284 | #ifdef __DEBUG_H__ |
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285 | cerr << "cpp nargs: " << nargs << endl; |
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286 | for ( i = 0; args[i] != NULL; i += 1 ) { |
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287 | cerr << args[i] << " "; |
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288 | } // for |
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289 | cerr << endl; |
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290 | #endif // __DEBUG_H__ |
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291 | |
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292 | execvp( args[0], (char *const *)args ); // should not return |
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293 | perror( "CFA Translator error: cpp level, execvp" ); |
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294 | exit( EXIT_FAILURE ); |
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295 | } // if |
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296 | |
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297 | wait( &code ); // wait for child to finish |
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298 | |
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299 | #ifdef __DEBUG_H__ |
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300 | cerr << "return code from cpp:" << WEXITSTATUS(code) << endl; |
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301 | #endif // __DEBUG_H__ |
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302 | |
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303 | if ( WIFSIGNALED(code) != 0 ) { // child failed ? |
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304 | rmtmpfile(); // remove tmpname |
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305 | cerr << "CFA Translator error: cpp failed with signal " << WTERMSIG(code) << endl; |
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306 | exit( EXIT_FAILURE ); |
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307 | } // if |
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308 | |
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309 | if ( WEXITSTATUS(code) != 0 ) { // child error ? |
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310 | rmtmpfile(); // remove tmpname |
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311 | exit( WEXITSTATUS( code ) ); // do not continue |
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312 | } // if |
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313 | |
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314 | // If -CFA flag specified, run the cfa-cpp preprocessor on the temporary file, and output is written to standard |
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315 | // output. Otherwise, run the cfa-cpp preprocessor on the temporary file and save the result into the output file. |
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316 | |
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317 | if ( fork() == 0 ) { // child runs CFA |
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318 | uargs[0] = ( *new string( bprefix + "/cfa-cpp" ) ).c_str(); |
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319 | |
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320 | uargs[nuargs] = "-p"; |
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321 | nuargs += 1; |
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322 | |
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323 | uargs[nuargs] = tmpname; |
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324 | nuargs += 1; |
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325 | if ( o_name != NULL ) { |
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326 | uargs[nuargs] = o_name; |
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327 | nuargs += 1; |
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328 | } else if ( ! CFA_flag ) { // run cfa-cpp ? |
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329 | uargs[nuargs] = cpp_out; |
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330 | nuargs += 1; |
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331 | } // if |
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332 | uargs[nuargs] = NULL; // terminate argument list |
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333 | |
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334 | #ifdef __DEBUG_H__ |
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335 | cerr << "cfa-cpp nuargs: " << o_name << " " << CFA_flag << " " << nuargs << endl; |
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336 | for ( i = 0; uargs[i] != NULL; i += 1 ) { |
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337 | cerr << uargs[i] << " "; |
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338 | } // for |
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339 | cerr << endl; |
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340 | #endif // __DEBUG_H__ |
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341 | |
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342 | execvp( uargs[0], (char * const *)uargs ); // should not return |
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343 | perror( "CFA Translator error: cpp level, execvp" ); |
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344 | exit( EXIT_FAILURE ); |
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345 | } // if |
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346 | |
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347 | wait( &code ); // wait for child to finish |
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348 | |
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349 | #ifdef __DEBUG_H__ |
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350 | cerr << "return code from cfa-cpp:" << WEXITSTATUS(code) << endl; |
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351 | #endif // __DEBUG_H__ |
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352 | |
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353 | // Must unlink here because file must exist across execvp. |
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354 | rmtmpfile(); // remove tmpname |
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355 | |
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356 | if ( WIFSIGNALED(code) ) { // child failed ? |
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357 | cerr << "CFA Translator error: cfa-cpp failed with signal " << WTERMSIG(code) << endl; |
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358 | exit( EXIT_FAILURE ); |
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359 | } // if |
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360 | |
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361 | exit( WEXITSTATUS(code) ); |
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362 | } // Stage1 |
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363 | |
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364 | |
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365 | void Stage2( const int argc, const char * const * argv ) { |
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366 | int i; |
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367 | |
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368 | string arg; |
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369 | |
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370 | const char *cpp_in = NULL; |
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371 | |
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372 | const char *args[argc + 100]; // leave space for 100 additional cfa command line values |
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373 | int nargs = 1; // number of arguments in args list; 0 => command name |
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374 | |
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375 | // process all the arguments |
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376 | |
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377 | checkEnv( args, nargs ); // arguments passed via environment variables |
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378 | |
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379 | for ( i = 1; i < argc; i += 1 ) { |
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380 | #ifdef __DEBUG_H__ |
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381 | cerr << "argv[" << i << "]:\"" << argv[i] << "\"" << endl; |
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382 | #endif // __DEBUG_H__ |
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383 | arg = argv[i]; |
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384 | #ifdef __DEBUG_H__ |
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385 | cerr << "arg:\"" << arg << "\"" << endl; |
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386 | #endif // __DEBUG_H__ |
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387 | if ( prefix( arg, "-" ) ) { |
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388 | // strip inappropriate flags |
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389 | |
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390 | if ( arg == "-quiet" || arg == "-version" || arg == "-fpreprocessed" || |
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391 | // Currently CFA does not suppose precompiled .h files. |
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392 | prefix( arg, "--output-pch" ) ) { |
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393 | |
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394 | // strip inappropriate flags with an argument |
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395 | |
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396 | } else if ( arg == "-auxbase" || arg == "-auxbase-strip" || arg == "-dumpbase" ) { |
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397 | i += 1; |
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398 | #ifdef __DEBUG_H__ |
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399 | cerr << "arg:\"" << argv[i] << "\"" << endl; |
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400 | #endif // __DEBUG_H__ |
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401 | |
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402 | // all other flags |
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403 | |
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404 | } else { |
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405 | args[nargs] = argv[i]; // pass the flag along |
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406 | nargs += 1; |
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407 | if ( arg == "-o" ) { |
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408 | i += 1; |
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409 | args[nargs] = argv[i]; // pass the argument along |
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410 | nargs += 1; |
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411 | #ifdef __DEBUG_H__ |
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412 | cerr << "arg:\"" << argv[i] << "\"" << endl; |
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413 | #endif // __DEBUG_H__ |
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414 | } // if |
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415 | } // if |
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416 | } else { // obtain input and possibly output files |
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417 | if ( cpp_in == NULL ) { |
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418 | cpp_in = argv[i]; |
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419 | #ifdef __DEBUG_H__ |
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420 | cerr << "cpp_in:\"" << cpp_in << "\"" << endl; |
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421 | #endif // __DEBUG_H__ |
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422 | } else { |
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423 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl; |
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424 | exit( EXIT_FAILURE ); |
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425 | } // if |
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426 | } // if |
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427 | } // for |
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428 | |
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429 | #ifdef __DEBUG_H__ |
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430 | cerr << "args:"; |
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431 | for ( i = 1; i < nargs; i += 1 ) { |
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432 | cerr << " " << args[i]; |
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433 | } // for |
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434 | cerr << endl; |
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435 | if ( cpp_in != NULL ) cerr << " " << cpp_in; |
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436 | #endif // __DEBUG_H__ |
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437 | |
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438 | args[0] = compiler_name.c_str(); |
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439 | args[nargs] = "-S"; // only compile and put assembler output in specified file |
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440 | nargs += 1; |
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441 | args[nargs] = cpp_in; |
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442 | nargs += 1; |
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443 | args[nargs] = NULL; // terminate argument list |
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444 | |
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445 | #ifdef __DEBUG_H__ |
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446 | cerr << "stage2 nargs: " << nargs << endl; |
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447 | for ( i = 0; args[i] != NULL; i += 1 ) { |
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448 | cerr << args[i] << " "; |
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449 | } // for |
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450 | cerr << endl; |
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451 | #endif // __DEBUG_H__ |
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452 | |
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453 | execvp( args[0], (char * const *)args ); // should not return |
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454 | perror( "CFA Translator error: cpp level, execvp" ); |
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455 | exit( EXIT_FAILURE ); // tell gcc not to go any further |
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456 | } // Stage2 |
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457 | |
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458 | |
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459 | int main( const int argc, const char * const argv[], const char * const env[] ) { |
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460 | #ifdef __DEBUG_H__ |
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461 | for ( int i = 0; env[i] != NULL; i += 1 ) { |
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462 | cerr << env[i] << endl; |
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463 | } // for |
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464 | #endif // __DEBUG_H__ |
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465 | |
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466 | string arg = argv[1]; |
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467 | |
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468 | // Currently, stage 1 starts with flag -E and stage 2 with flag -fpreprocessed. |
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469 | |
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470 | if ( arg == "-E" ) { |
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471 | #ifdef __DEBUG_H__ |
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472 | cerr << "Stage1" << endl; |
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473 | #endif // __DEBUG_H__ |
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474 | Stage1( argc, argv ); |
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475 | } else if ( arg == "-fpreprocessed" ) { |
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476 | #ifdef __DEBUG_H__ |
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477 | cerr << "Stage2" << endl; |
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478 | #endif // __DEBUG_H__ |
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479 | Stage2( argc, argv ); |
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480 | } else { |
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481 | cerr << "Usage: " << argv[0] << " input-file [output-file] [options]" << endl; |
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482 | exit( EXIT_FAILURE ); |
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483 | } // if |
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484 | } // main |
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485 | |
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486 | |
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487 | // Local Variables: // |
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488 | // compile-command: "make install" // |
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489 | // End: // |
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