1 | /* G++ preliminary semantic processing for the compiler driver. |
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2 | Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc. |
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3 | Contributed by Brendan Kehoe (brendan@cygnus.com). |
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4 | |
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5 | This file is part of GNU CC. |
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6 | |
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7 | GNU CC is free software; you can redistribute it and/or modify |
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8 | it under the terms of the GNU General Public License as published by |
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9 | the Free Software Foundation; either version 2, or (at your option) |
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10 | any later version. |
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11 | |
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12 | GNU CC is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | GNU General Public License for more details. |
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16 | |
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17 | You should have received a copy of the GNU General Public License |
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18 | along with GNU CC; see the file COPYING. If not, write to |
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19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
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20 | Boston, MA 02111-1307, USA. */ |
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21 | |
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22 | /* This program is a wrapper to the main `gcc' driver. For GNU C++, |
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23 | we need to do two special things: a) append `-lg++' in situations |
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24 | where it's appropriate, to link in libg++, and b) add `-xc++'..`-xnone' |
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25 | around file arguments named `foo.c' or `foo.i'. So, we do all of |
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26 | this semantic processing then just exec gcc with the new argument |
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27 | list. |
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28 | |
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29 | We used to do all of this in a small shell script, but many users |
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30 | found the performance of this as a shell script to be unacceptable. |
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31 | In situations where your PATH has a lot of NFS-mounted directories, |
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32 | using a script that runs sed and other things would be a nasty |
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33 | performance hit. With this program, we never search the PATH at all. */ |
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34 | |
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35 | #include "config.h" |
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36 | #ifdef __STDC__ |
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37 | #include <stdarg.h> |
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38 | #else |
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39 | #include <varargs.h> |
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40 | #endif |
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41 | #include <stdio.h> |
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42 | #include <sys/types.h> |
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43 | #if !defined(_WIN32) |
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44 | #include <sys/file.h> /* May get R_OK, etc. on some systems. */ |
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45 | #else |
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46 | #include <process.h> |
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47 | #endif |
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48 | #include <errno.h> |
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49 | |
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50 | /* Defined to the name of the compiler; if using a cross compiler, the |
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51 | Makefile should compile this file with the proper name |
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52 | (e.g., "i386-aout-gcc"). */ |
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53 | #ifndef GCC_NAME |
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54 | #define GCC_NAME "gcc" |
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55 | #endif |
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56 | |
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57 | /* This bit is set if we saw a `-xfoo' language specification. */ |
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58 | #define LANGSPEC (1<<1) |
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59 | /* This bit is set if they did `-lm' or `-lmath'. */ |
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60 | #define MATHLIB (1<<2) |
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61 | |
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62 | #ifndef MATH_LIBRARY |
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63 | #define MATH_LIBRARY "-lm" |
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64 | #endif |
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65 | |
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66 | /* On MSDOS, write temp files in current dir |
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67 | because there's no place else we can expect to use. */ |
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68 | #ifdef __MSDOS__ |
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69 | #ifndef P_tmpdir |
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70 | #define P_tmpdir "." |
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71 | #endif |
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72 | #ifndef R_OK |
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73 | #define R_OK 4 |
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74 | #define W_OK 2 |
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75 | #define X_OK 1 |
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76 | #endif |
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77 | #endif |
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78 | |
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79 | #ifndef VPROTO |
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80 | #ifdef __STDC__ |
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81 | #define PVPROTO(ARGS) ARGS |
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82 | #define VPROTO(ARGS) ARGS |
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83 | #define VA_START(va_list,var) va_start(va_list,var) |
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84 | #else |
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85 | #define PVPROTO(ARGS) () |
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86 | #define VPROTO(ARGS) (va_alist) va_dcl |
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87 | #define VA_START(va_list,var) va_start(va_list) |
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88 | #endif |
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89 | #endif |
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90 | |
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91 | #ifndef errno |
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92 | extern int errno; |
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93 | #endif |
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94 | |
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95 | extern int sys_nerr; |
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96 | #ifndef HAVE_STRERROR |
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97 | #if defined(bsd4_4) |
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98 | extern const char *const sys_errlist[]; |
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99 | #else |
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100 | extern char *sys_errlist[]; |
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101 | #endif |
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102 | #else |
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103 | extern char *strerror(); |
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104 | #endif |
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105 | |
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106 | /* Name with which this program was invoked. */ |
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107 | static char *programname; |
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108 | |
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109 | char * |
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110 | my_strerror(e) |
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111 | int e; |
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112 | { |
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113 | |
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114 | #ifdef HAVE_STRERROR |
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115 | return strerror(e); |
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116 | |
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117 | #else |
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118 | |
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119 | static char buffer[30]; |
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120 | if (!e) |
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121 | return ""; |
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122 | |
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123 | if (e > 0 && e < sys_nerr) |
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124 | return sys_errlist[e]; |
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125 | |
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126 | sprintf (buffer, "Unknown error %d", e); |
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127 | return buffer; |
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128 | #endif |
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129 | } |
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130 | |
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131 | #ifdef HAVE_VPRINTF |
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132 | /* Output an error message and exit */ |
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133 | |
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134 | static void |
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135 | fatal VPROTO((char *format, ...)) |
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136 | { |
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137 | #ifndef __STDC__ |
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138 | char *format; |
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139 | #endif |
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140 | va_list ap; |
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141 | |
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142 | VA_START (ap, format); |
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143 | |
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144 | #ifndef __STDC__ |
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145 | format = va_arg (ap, char*); |
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146 | #endif |
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147 | |
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148 | fprintf (stderr, "%s: ", programname); |
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149 | vfprintf (stderr, format, ap); |
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150 | va_end (ap); |
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151 | fprintf (stderr, "\n"); |
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152 | #if 0 |
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153 | /* XXX Not needed for g++ driver. */ |
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154 | delete_temp_files (); |
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155 | #endif |
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156 | exit (1); |
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157 | } |
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158 | |
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159 | static void |
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160 | error VPROTO((char *format, ...)) |
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161 | { |
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162 | #ifndef __STDC__ |
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163 | char *format; |
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164 | #endif |
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165 | va_list ap; |
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166 | |
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167 | VA_START (ap, format); |
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168 | |
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169 | #ifndef __STDC__ |
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170 | format = va_arg (ap, char*); |
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171 | #endif |
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172 | |
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173 | fprintf (stderr, "%s: ", programname); |
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174 | vfprintf (stderr, format, ap); |
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175 | va_end (ap); |
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176 | |
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177 | fprintf (stderr, "\n"); |
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178 | } |
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179 | |
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180 | #else /* not HAVE_VPRINTF */ |
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181 | |
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182 | static void |
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183 | error (msg, arg1, arg2) |
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184 | char *msg, *arg1, *arg2; |
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185 | { |
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186 | fprintf (stderr, "%s: ", programname); |
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187 | fprintf (stderr, msg, arg1, arg2); |
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188 | fprintf (stderr, "\n"); |
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189 | } |
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190 | |
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191 | static void |
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192 | fatal (msg, arg1, arg2) |
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193 | char *msg, *arg1, *arg2; |
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194 | { |
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195 | error (msg, arg1, arg2); |
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196 | #if 0 |
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197 | /* XXX Not needed for g++ driver. */ |
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198 | delete_temp_files (); |
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199 | #endif |
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200 | exit (1); |
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201 | } |
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202 | |
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203 | #endif /* not HAVE_VPRINTF */ |
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204 | |
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205 | /* More 'friendly' abort that prints the line and file. |
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206 | config.h can #define abort fancy_abort if you like that sort of thing. */ |
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207 | |
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208 | void |
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209 | fancy_abort () |
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210 | { |
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211 | fatal ("Internal g++ abort."); |
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212 | } |
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213 | |
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214 | char * |
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215 | xmalloc (size) |
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216 | unsigned size; |
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217 | { |
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218 | register char *value = (char *) malloc (size); |
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219 | if (value == 0) |
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220 | fatal ("virtual memory exhausted"); |
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221 | return value; |
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222 | } |
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223 | |
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224 | /* Return a newly-allocated string whose contents concatenate those |
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225 | of s1, s2, s3. */ |
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226 | static char * |
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227 | concat (s1, s2, s3) |
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228 | char *s1, *s2, *s3; |
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229 | { |
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230 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); |
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231 | char *result = xmalloc (len1 + len2 + len3 + 1); |
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232 | |
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233 | strcpy (result, s1); |
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234 | strcpy (result + len1, s2); |
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235 | strcpy (result + len1 + len2, s3); |
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236 | *(result + len1 + len2 + len3) = 0; |
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237 | |
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238 | return result; |
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239 | } |
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240 | |
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241 | static void |
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242 | pfatal_with_name (name) |
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243 | char *name; |
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244 | { |
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245 | fatal (concat ("%s: ", my_strerror (errno), ""), name); |
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246 | } |
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247 | |
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248 | #ifdef __MSDOS__ |
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249 | /* This is the common prefix we use to make temp file names. */ |
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250 | char *temp_filename; |
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251 | |
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252 | /* Length of the prefix. */ |
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253 | int temp_filename_length; |
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254 | |
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255 | /* Compute a string to use as the base of all temporary file names. */ |
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256 | static char * |
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257 | choose_temp_base_try (try, base) |
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258 | char *try; |
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259 | char *base; |
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260 | { |
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261 | char *rv; |
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262 | if (base) |
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263 | rv = base; |
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264 | else if (try == (char *)0) |
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265 | rv = 0; |
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266 | else if (access (try, R_OK | W_OK) != 0) |
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267 | rv = 0; |
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268 | else |
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269 | rv = try; |
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270 | return rv; |
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271 | } |
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272 | |
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273 | static void |
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274 | choose_temp_base () |
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275 | { |
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276 | char *base = 0; |
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277 | int len; |
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278 | |
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279 | base = choose_temp_base_try (getenv ("TMPDIR"), base); |
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280 | base = choose_temp_base_try (getenv ("TMP"), base); |
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281 | base = choose_temp_base_try (getenv ("TEMP"), base); |
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282 | |
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283 | #ifdef P_tmpdir |
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284 | base = choose_temp_base_try (P_tmpdir, base); |
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285 | #endif |
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286 | |
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287 | base = choose_temp_base_try ("/usr/tmp", base); |
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288 | base = choose_temp_base_try ("/tmp", base); |
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289 | |
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290 | /* If all else fails, use the current directory! */ |
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291 | if (base == (char *)0) |
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292 | base = "./"; |
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293 | |
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294 | len = strlen (base); |
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295 | temp_filename = xmalloc (len + sizeof("/ccXXXXXX")); |
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296 | strcpy (temp_filename, base); |
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297 | if (len > 0 && temp_filename[len-1] != '/') |
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298 | temp_filename[len++] = '/'; |
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299 | strcpy (temp_filename + len, "ccXXXXXX"); |
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300 | |
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301 | mktemp (temp_filename); |
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302 | temp_filename_length = strlen (temp_filename); |
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303 | if (temp_filename_length == 0) |
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304 | abort (); |
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305 | } |
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306 | |
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307 | static void |
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308 | perror_exec (name) |
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309 | char *name; |
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310 | { |
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311 | char *s; |
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312 | |
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313 | if (errno < sys_nerr) |
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314 | s = concat ("installation problem, cannot exec %s: ", |
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315 | my_strerror( errno ), ""); |
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316 | else |
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317 | s = "installation problem, cannot exec %s"; |
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318 | error (s, name); |
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319 | } |
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320 | |
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321 | /* This is almost exactly what's in gcc.c:pexecute for MSDOS. */ |
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322 | void |
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323 | run_dos (program, argv) |
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324 | char *program; |
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325 | char *argv[]; |
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326 | { |
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327 | char *scmd, *rf; |
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328 | FILE *argfile; |
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329 | int i; |
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330 | |
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331 | choose_temp_base (); /* not in gcc.c */ |
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332 | |
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333 | scmd = (char *) malloc (strlen (program) + strlen (temp_filename) + 10); |
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334 | rf = scmd + strlen (program) + 6; |
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335 | sprintf (scmd, "%s.exe @%s.gp", program, temp_filename); |
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336 | |
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337 | argfile = fopen (rf, "w"); |
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338 | if (argfile == 0) |
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339 | pfatal_with_name (rf); |
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340 | |
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341 | for (i=1; argv[i]; i++) |
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342 | { |
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343 | char *cp; |
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344 | for (cp = argv[i]; *cp; cp++) |
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345 | { |
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346 | if (*cp == '"' || *cp == '\'' || *cp == '\\' || isspace (*cp)) |
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347 | fputc ('\\', argfile); |
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348 | fputc (*cp, argfile); |
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349 | } |
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350 | fputc ('\n', argfile); |
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351 | } |
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352 | fclose (argfile); |
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353 | |
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354 | i = system (scmd); |
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355 | |
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356 | remove (rf); |
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357 | |
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358 | if (i == -1) |
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359 | perror_exec (program); |
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360 | } |
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361 | #endif /* __MSDOS__ */ |
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362 | |
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363 | int |
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364 | main (argc, argv) |
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365 | int argc; |
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366 | char **argv; |
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367 | { |
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368 | register int i, j = 0; |
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369 | register char *p; |
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370 | int verbose = 0; |
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371 | |
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372 | /* This will be 0 if we encounter a situation where we should not |
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373 | link in libstdc++, or 2 if we should link in libg++ as well. */ |
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374 | int library = 1; |
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375 | |
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376 | /* Used to track options that take arguments, so we don't go wrapping |
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377 | those with -xc++/-xnone. */ |
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378 | char *quote = NULL; |
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379 | |
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380 | /* The new argument list will be contained in this. */ |
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381 | char **arglist; |
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382 | |
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383 | /* The name of the compiler we will want to run---by default, it |
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384 | will be the definition of `GCC_NAME', e.g., `gcc'. */ |
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385 | char *gcc = GCC_NAME; |
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386 | |
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387 | /* Non-zero if we saw a `-xfoo' language specification on the |
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388 | command line. Used to avoid adding our own -xc++ if the user |
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389 | already gave a language for the file. */ |
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390 | int saw_speclang = 0; |
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391 | |
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392 | /* Non-zero if we saw `-lm' or `-lmath' on the command line. */ |
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393 | char *saw_math = 0; |
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394 | |
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395 | /* The number of arguments being added to what's in argv, other than |
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396 | libraries. We use this to track the number of times we've inserted |
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397 | -xc++/-xnone. */ |
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398 | int added = 0; |
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399 | |
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400 | /* An array used to flag each argument that needs a bit set for |
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401 | LANGSPEC or MATHLIB. */ |
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402 | int *args; |
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403 | |
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404 | p = argv[0] + strlen (argv[0]); |
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405 | |
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406 | /* If we're called as g++ (or i386-aout-g++), link in libg++ as well. */ |
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407 | |
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408 | if (strcmp (p - 3, "g++") == 0) |
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409 | { |
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410 | library = 2; |
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411 | } |
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412 | |
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413 | while (p != argv[0] && p[-1] != '/') |
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414 | --p; |
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415 | programname = p; |
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416 | |
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417 | if (argc == 1) |
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418 | fatal ("No input files specified.\n"); |
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419 | |
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420 | #ifndef __MSDOS__ |
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421 | /* We do a little magic to find out where the main gcc executable |
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422 | is. If they ran us as /usr/local/bin/g++, then we will look |
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423 | for /usr/local/bin/gcc; similarly, if they just ran us as `g++', |
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424 | we'll just look for `gcc'. */ |
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425 | if (p != argv[0]) |
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426 | { |
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427 | *--p = '\0'; |
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428 | gcc = (char *) malloc ((strlen (argv[0]) + 1 + strlen (GCC_NAME) + 1) |
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429 | * sizeof (char)); |
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430 | sprintf (gcc, "%s/%s", argv[0], GCC_NAME); |
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431 | } |
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432 | #endif |
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433 | |
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434 | args = (int *) malloc (argc * sizeof (int)); |
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435 | bzero ((char *) args, argc * sizeof (int)); |
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436 | |
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437 | for (i = 1; i < argc; i++) |
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438 | { |
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439 | /* If the previous option took an argument, we swallow it here. */ |
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440 | if (quote) |
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441 | { |
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442 | quote = NULL; |
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443 | continue; |
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444 | } |
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445 | |
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446 | if (argv[i][0] == '\0' || argv[i][1] == '\0') |
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447 | continue; |
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448 | |
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449 | if (argv[i][0] == '-') |
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450 | { |
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451 | if (library != 0 && strcmp (argv[i], "-nostdlib") == 0) |
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452 | { |
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453 | library = 0; |
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454 | } |
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455 | else if (strcmp (argv[i], "-lm") == 0 |
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456 | || strcmp (argv[i], "-lmath") == 0) |
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457 | args[i] |= MATHLIB; |
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458 | else if (strcmp (argv[i], "-v") == 0) |
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459 | { |
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460 | verbose = 1; |
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461 | if (argc == 2) |
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462 | { |
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463 | /* If they only gave us `-v', don't try to link |
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464 | in libg++. */ |
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465 | library = 0; |
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466 | } |
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467 | } |
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468 | else if (strncmp (argv[i], "-x", 2) == 0) |
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469 | saw_speclang = 1; |
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470 | else if (((argv[i][2] == '\0' |
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471 | && (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL) |
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472 | || strcmp (argv[i], "-Tdata") == 0)) |
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473 | quote = argv[i]; |
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474 | else if (library != 0 && ((argv[i][2] == '\0' |
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475 | && (char *) strchr ("cSEM", argv[i][1]) != NULL) |
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476 | || strcmp (argv[i], "-MM") == 0)) |
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477 | { |
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478 | /* Don't specify libraries if we won't link, since that would |
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479 | cause a warning. */ |
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480 | library = 0; |
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481 | } |
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482 | else |
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483 | /* Pass other options through. */ |
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484 | continue; |
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485 | } |
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486 | else |
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487 | { |
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488 | int len; |
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489 | |
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490 | if (saw_speclang) |
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491 | { |
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492 | saw_speclang = 0; |
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493 | continue; |
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494 | } |
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495 | |
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496 | /* If the filename ends in .c or .i, put options around it. |
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497 | But not if a specified -x option is currently active. */ |
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498 | len = strlen (argv[i]); |
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499 | if (len > 2 |
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500 | && (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i') |
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501 | && argv[i][len - 2] == '.') |
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502 | { |
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503 | args[i] |= LANGSPEC; |
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504 | added += 2; |
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505 | } |
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506 | } |
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507 | } |
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508 | |
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509 | if (quote) |
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510 | fatal ("argument to `%s' missing\n", quote); |
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511 | |
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512 | if (added || library) |
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513 | { |
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514 | arglist = (char **) malloc ((argc + added + 4) * sizeof (char *)); |
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515 | |
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516 | for (i = 1, j = 1; i < argc; i++, j++) |
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517 | { |
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518 | arglist[j] = argv[i]; |
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519 | |
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520 | /* Make sure -lg++ is before the math library, since libg++ |
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521 | itself uses those math routines. */ |
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522 | if (!saw_math && (args[i] & MATHLIB) && library) |
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523 | { |
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524 | --j; |
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525 | saw_math = argv[i]; |
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526 | } |
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527 | |
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528 | /* Wrap foo.c and foo.i files in a language specification to |
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529 | force the gcc compiler driver to run cc1plus on them. */ |
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530 | if (args[i] & LANGSPEC) |
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531 | { |
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532 | int len = strlen (argv[i]); |
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533 | if (argv[i][len - 1] == 'i') |
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534 | arglist[j++] = "-xc++-cpp-output"; |
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535 | else |
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536 | arglist[j++] = "-xc++"; |
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537 | arglist[j++] = argv[i]; |
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538 | arglist[j] = "-xnone"; |
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539 | } |
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540 | } |
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541 | |
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542 | /* Add `-lg++' if we haven't already done so. */ |
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543 | if (library == 2) |
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544 | arglist[j++] = "-lg++"; |
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545 | if (library) |
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546 | arglist[j++] = "-lstdc++"; |
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547 | if (saw_math) |
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548 | arglist[j++] = saw_math; |
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549 | else if (library) |
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550 | arglist[j++] = MATH_LIBRARY; |
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551 | |
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552 | arglist[j] = NULL; |
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553 | } |
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554 | else |
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555 | /* No need to copy 'em all. */ |
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556 | arglist = argv; |
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557 | |
---|
558 | arglist[0] = gcc; |
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559 | |
---|
560 | if (verbose) |
---|
561 | { |
---|
562 | if (j == 0) |
---|
563 | j = argc; |
---|
564 | |
---|
565 | for (i = 0; i < j; i++) |
---|
566 | fprintf (stderr, " %s", arglist[i]); |
---|
567 | fprintf (stderr, "\n"); |
---|
568 | } |
---|
569 | #if !defined(OS2) && !defined (_WIN32) |
---|
570 | #ifdef __MSDOS__ |
---|
571 | run_dos (gcc, arglist); |
---|
572 | #else /* !__MSDOS__ */ |
---|
573 | if (execvp (gcc, arglist) < 0) |
---|
574 | pfatal_with_name (gcc); |
---|
575 | #endif /* __MSDOS__ */ |
---|
576 | #else /* OS2 or _WIN32 */ |
---|
577 | if (spawnvp (1, gcc, arglist) < 0) |
---|
578 | pfatal_with_name (gcc); |
---|
579 | #endif |
---|
580 | |
---|
581 | return 0; |
---|
582 | } |
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