tcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifdef ONE_SOURCE
  22 #include "libtcc.c"
  23 #else
  24 #include "tcc.h"
  25 #endif
  26
  27 static void help(void)
  28 {
  29     printf("tcc version " TCC_VERSION " - Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  30            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  31            "       tcc [options...] -run infile [arguments...]\n"
  32            "General options:\n"
  33            "  -c          compile only - generate an object file\n"
  34            "  -o outfile  set output filename\n"
  35            "  -run        run compiled source\n"
  36            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  37            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  38            "  -w          disable all warnings\n"
  39            "  -v          show version\n"
  40            "  -vv         show included files (as sole argument: show search paths)\n"
  41            "  -dumpversion\n"
  42            "  -bench      show compilation statistics\n"
  43            "Preprocessor options:\n"
  44            "  -E          preprocess only\n"
  45            "  -Idir       add include path 'dir'\n"
  46            "  -Dsym[=val] define 'sym' with value 'val'\n"
  47            "  -Usym       undefine 'sym'\n"
  48            "Linker options:\n"
  49            "  -Ldir       add library path 'dir'\n"
  50            "  -llib       link with dynamic or static library 'lib'\n"
  51            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
  52            "  -r          generate (relocatable) object file\n"
  53            "  -rdynamic   export all global symbols to dynamic linker\n"
  54            "  -shared     generate a shared library\n"
  55            "  -soname     set name for shared library to be used at runtime\n"
  56            "  -static     static linking\n"
  57            "  -Wl,-opt[=val]  set linker option (see manual)\n"
  58            "Debugger options:\n"
  59            "  -g          generate runtime debug info\n"
  60 #ifdef CONFIG_TCC_BCHECK
  61            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  62 #endif
  63 #ifdef CONFIG_TCC_BACKTRACE
  64            "  -bt N       show N callers in stack traces\n"
  65 #endif
  66            "Misc options:\n"
  67            "  -nostdinc   do not use standard system include paths\n"
  68            "  -nostdlib   do not link with standard crt and libraries\n"
  69            "  -Bdir       use 'dir' as tcc internal library and include path\n"
  70            "  -MD         generate target dependencies for make\n"
  71            "  -MF depfile put generated dependencies here\n"
  72            "  -norunsrc   Do not compile the file which is the first argument after -run.\n"
  73            );
  74 }
  75
  76 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
  77 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  78 #ifdef _WIN32
  79 #include <process.h>
  80 static int execvp_win32(const char *prog, char **argv)
  81 {
  82     int ret = spawnvp(P_NOWAIT, prog, (char *const*)argv);
  83     if (-1 == ret)
  84         return ret;
  85     cwait(&ret, ret, WAIT_CHILD);
  86     exit(ret);
  87 }
  88 #define execvp execvp_win32
  89 #endif
  90 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
  91 {
  92     char child_path[4096], *child_name; const char *target;
  93     switch (atoi(optarg)) {
  94 #ifdef TCC_TARGET_I386
  95         case 32: break;
  96         case 64: target = "x86_64";
  97 #else
  98         case 64: break;
  99         case 32: target = "i386";
 100 #endif
 101             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 102             child_name = tcc_basename(child_path);
 103             strcpy(child_name, target);
 104 #ifdef TCC_TARGET_PE
 105             strcat(child_name, "-win32");
 106 #endif
 107             strcat(child_name, "-tcc");
 108             if (strcmp(argv[0], child_path)) {
 109                 if (s->verbose > 0)
 110                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 111                 execvp(argv[0] = child_path, argv);
 112             }
 113             tcc_error("'%s' not found", child_name);
 114         case 0: /* ignore -march etc. */
 115             break;
 116         default:
 117             tcc_warning("unsupported option \"-m%s\"", optarg);
 118     }
 119 }
 120 #else
 121 #define exec_other_tcc(s, argv, optarg)
 122 #endif
 123
 124 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 125 {
 126     FILE *depout;
 127     char buf[1024], *ext;
 128     int i;
 129
 130     if (!filename) {
 131         /* compute filename automatically
 132          * dir/file.o -> dir/file.d             */
 133         pstrcpy(buf, sizeof(buf), target);
 134         ext = tcc_fileextension(buf);
 135         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 136         filename = buf;
 137     }
 138
 139     if (s->verbose)
 140         printf("<- %s\n", filename);
 141
 142     /* XXX return err codes instead of error() ? */
 143     depout = fopen(filename, "w");
 144     if (!depout)
 145         tcc_error("could not open '%s'", filename);
 146
 147     fprintf(depout, "%s : \\\n", target);
 148     for (i=0; i<s->nb_target_deps; ++i)
 149         fprintf(depout, " %s \\\n", s->target_deps[i]);
 150     fprintf(depout, "\n");
 151     fclose(depout);
 152 }
 153
 154 static char *default_outputfile(TCCState *s, const char *first_file)
 155 {
 156     char buf[1024];
 157     char *ext;
 158     const char *name = "a";
 159
 160     if (first_file && strcmp(first_file, "-"))
 161         name = tcc_basename(first_file);
 162     pstrcpy(buf, sizeof(buf), name);
 163     ext = tcc_fileextension(buf);
 164 #ifdef TCC_TARGET_PE
 165     if (s->output_type == TCC_OUTPUT_DLL)
 166         strcpy(ext, ".dll");
 167     else
 168     if (s->output_type == TCC_OUTPUT_EXE)
 169         strcpy(ext, ".exe");
 170     else
 171 #endif
 172     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
 173           (s->output_type == TCC_OUTPUT_PREPROCESS) )
 174         && *ext)
 175         strcpy(ext, ".o");
 176     else
 177         strcpy(buf, "a.out");
 178
 179     return tcc_strdup(buf);
 180 }
 181
 182 static void print_paths(const char *msg, char **paths, int nb_paths)
 183 {
 184     int i;
 185     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
 186     for(i = 0; i < nb_paths; i++)
 187         printf("  %s\n", paths[i]);
 188 }
 189
 190 static void display_info(TCCState *s, int what)
 191 {
 192     switch (what) {
 193     case 0:
 194         printf("tcc version %s ("
 195 #ifdef TCC_TARGET_I386
 196         "i386"
 197 # ifdef TCC_TARGET_PE
 198         " Win32"
 199 # endif
 200 #elif defined TCC_TARGET_X86_64
 201         "x86-64"
 202 # ifdef TCC_TARGET_PE
 203         " Win64"
 204 # endif
 205 #elif defined TCC_TARGET_ARM
 206         "ARM"
 207 # ifdef TCC_ARM_HARDFLOAT
 208         " Hard Float"
 209 # endif
 210 # ifdef TCC_TARGET_PE
 211         " WinCE"
 212 # endif
 213 #endif
 214 #ifndef TCC_TARGET_PE
 215 # ifdef __linux
 216         " Linux"
 217 # endif
 218 #endif
 219         ")\n", TCC_VERSION);
 220         break;
 221     case 1:
 222         printf("install: %s/\n", s->tcc_lib_path);
 223         /* print_paths("programs", NULL, 0); */
 224         print_paths("crt", s->crt_paths, s->nb_crt_paths);
 225         print_paths("libraries", s->library_paths, s->nb_library_paths);
 226         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
 227         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
 228         break;
 229     }
 230 }
 231
 232 static int64_t getclock_us(void)
 233 {
 234 #ifdef _WIN32
 235     struct _timeb tb;
 236     _ftime(&tb);
 237     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 238 #else
 239     struct timeval tv;
 240     gettimeofday(&tv, NULL);
 241     return tv.tv_sec * 1000000LL + tv.tv_usec;
 242 #endif
 243 }
 244
 245 int main(int argc, char **argv)
 246 {
 247     TCCState *s;
 248     int ret, optind, i, bench;
 249     int64_t start_time = 0;
 250     const char *first_file = NULL;
 251
 252     s = tcc_new();
 253     s->output_type = TCC_OUTPUT_EXE;
 254
 255     optind = tcc_parse_args(s, argc - 1, argv + 1);
 256     tcc_set_environment(s);
 257
 258     if (optind == 0) {
 259         help();
 260         return 1;
 261     }
 262
 263     if (s->option_m)
 264         exec_other_tcc(s, argv, s->option_m);
 265
 266     if (s->verbose)
 267         display_info(s, 0);
 268
 269     if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
 270         tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 271         display_info(s, 1);
 272         return 0;
 273     }
 274
 275     if (s->verbose && optind == 1)
 276         return 0;
 277
 278     if (s->nb_files == 0)
 279         tcc_error("no input files\n");
 280
 281     /* check -c consistency : only single file handled. XXX: checks file type */
 282     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 283         if (s->nb_libraries != 0)
 284             tcc_error("cannot specify libraries with -c");
 285         /* accepts only a single input file */
 286         if (s->nb_files != 1)
 287             tcc_error("cannot specify multiple files with -c");
 288     }
 289
 290     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 291         if (!s->outfile) {
 292             s->ppfp = stdout;
 293         } else {
 294             s->ppfp = fopen(s->outfile, "w");
 295             if (!s->ppfp)
 296                 tcc_error("could not write '%s'", s->outfile);
 297         }
 298     }
 299
 300     bench = s->do_bench;
 301     if (bench)
 302         start_time = getclock_us();
 303
 304     tcc_set_output_type(s, s->output_type);
 305
 306     /* compile or add each files or library */
 307     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 308         const char *filename;
 309
 310         filename = s->files[i];
 311         if (filename[0] == '-' && filename[1] == 'l') {
 312             if (tcc_add_library(s, filename + 2) < 0) {
 313                 tcc_error_noabort("cannot find '%s'", filename);
 314                 ret = 1;
 315             }
 316         } else {
 317             if (1 == s->verbose)
 318                 printf("-> %s\n", filename);
 319             if (tcc_add_file(s, filename) < 0)
 320                 ret = 1;
 321             if (!first_file)
 322                 first_file = filename;
 323         }
 324     }
 325
 326     if (0 == ret) {
 327         if (bench)
 328             tcc_print_stats(s, getclock_us() - start_time);
 329
 330         if (s->output_type == TCC_OUTPUT_MEMORY) {
 331 #ifdef TCC_IS_NATIVE
 332             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 333 #else
 334             tcc_error_noabort("-run is not available in a cross compiler");
 335             ret = 1;
 336 #endif
 337         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 338              if (s->outfile)
 339                 fclose(s->ppfp);
 340         } else {
 341             if (!s->outfile)
 342                 s->outfile = default_outputfile(s, first_file);
 343             ret = !!tcc_output_file(s, s->outfile);
 344             /* dump collected dependencies */
 345             if (s->gen_deps && !ret)
 346                 gen_makedeps(s, s->outfile, s->deps_outfile);
 347         }
 348     }
 349
 350     tcc_delete(s);
 351     if (bench)
 352         tcc_memstats();
 353     return ret;
 354 }