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 print_paths(const char *msg, char **paths, int nb_paths)
  28 {
  29     int i;
  30     printf("%s:\n%s", msg, nb_paths ? "" : "  -\n");
  31     for(i = 0; i < nb_paths; i++)
  32         printf("  %s\n", paths[i]);
  33 }
  34
  35 static void display_info(TCCState *s, int what)
  36 {
  37     switch (what) {
  38     case 0:
  39         printf("tcc version %s ("
  40 #ifdef TCC_TARGET_I386
  41         "i386"
  42 # ifdef TCC_TARGET_PE
  43         " Win32"
  44 # endif
  45 #elif defined TCC_TARGET_X86_64
  46         "x86-64"
  47 # ifdef TCC_TARGET_PE
  48         " Win64"
  49 # endif
  50 #elif defined TCC_TARGET_ARM
  51         "ARM"
  52 # ifdef TCC_ARM_HARDFLOAT
  53         " Hard Float"
  54 # endif
  55 # ifdef TCC_TARGET_PE
  56         " WinCE"
  57 # endif
  58 #elif defined TCC_TARGET_ARM64
  59         "AArch64"
  60 # ifdef TCC_ARM_HARDFLOAT
  61         " Hard Float"
  62 # endif
  63 # ifdef TCC_TARGET_PE
  64         " WinCE"
  65 # endif
  66 #endif
  67 #ifndef TCC_TARGET_PE
  68 # ifdef __linux
  69         " Linux"
  70 # endif
  71 #endif
  72         ")\n", TCC_VERSION);
  73         break;
  74     case 1:
  75         printf("install: %s\n", s->tcc_lib_path);
  76         /* print_paths("programs", NULL, 0); */
  77         print_paths("crt", s->crt_paths, s->nb_crt_paths);
  78         print_paths("libraries", s->library_paths, s->nb_library_paths);
  79         print_paths("include", s->sysinclude_paths, s->nb_sysinclude_paths);
  80         printf("elfinterp:\n  %s\n",  DEFAULT_ELFINTERP(s));
  81         break;
  82     }
  83 }
  84
  85 static void help(TCCState *s)
  86 {
  87     display_info(s, 0);
  88     printf("Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  89            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  90            "       tcc [options...] -run infile [arguments...]\n"
  91            "General options:\n"
  92            "  -c          compile only - generate an object file\n"
  93            "  -o outfile  set output filename\n"
  94            "  -run        run compiled source\n"
  95            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  96            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  97            "  -w          disable all warnings\n"
  98            "  -v          show version\n"
  99            "  -vv         show included files (as sole argument: show search paths)\n"
 100            "  -dumpversion\n"
 101            "  -bench      show compilation statistics\n"
 102            "Preprocessor options:\n"
 103            "  -E          preprocess only\n"
 104            "  -Idir       add include path 'dir'\n"
 105            "  -Dsym[=val] define 'sym' with value 'val'\n"
 106            "  -Usym       undefine 'sym'\n"
 107            "  -P          do not output a #line directive\n"
 108            "  -P1         use a #line directive in output instead of the gcc style\n"
 109            "  -dD         put a define directive in the output (inside a comment)\n"
 110            "Linker options:\n"
 111            "  -Ldir       add library path 'dir'\n"
 112            "  -llib       link with dynamic or static library 'lib'\n"
 113            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
 114            "  -r          generate (relocatable) object file\n"
 115            "  -rdynamic   export all global symbols to dynamic linker\n"
 116            "  -shared     generate a shared library\n"
 117            "  -soname     set name for shared library to be used at runtime\n"
 118            "  -static     static linking\n"
 119            "  -Wl,-opt[=val]  set linker option (see manual)\n"
 120            "Debugger options:\n"
 121            "  -g          generate runtime debug info\n"
 122 #ifdef CONFIG_TCC_BCHECK
 123            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
 124 #endif
 125 #ifdef CONFIG_TCC_BACKTRACE
 126            "  -bt N       show N callers in stack traces\n"
 127 #endif
 128            "Misc options:\n"
 129            "  -nostdinc   do not use standard system include paths\n"
 130            "  -nostdlib   do not link with standard crt and libraries\n"
 131            "  -Bdir       use 'dir' as tcc internal library and include path\n"
 132            "  -MD         generate target dependencies for make\n"
 133            "  -MF depfile put generated dependencies here\n"
 134            );
 135 }
 136
 137 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 138 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 139 #ifdef _WIN32
 140 #include <process.h>
 141 static int execvp_win32(const char *prog, char **argv)
 142 {
 143     int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
 144     if (-1 == ret)
 145         return ret;
 146     cwait(&ret, ret, WAIT_CHILD);
 147     exit(ret);
 148 }
 149 #define execvp execvp_win32
 150 #endif
 151 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
 152 {
 153     char child_path[4096], *child_name; const char *target;
 154     switch (atoi(optarg)) {
 155 #ifdef TCC_TARGET_I386
 156         case 32: break;
 157         case 64: target = "x86_64";
 158 #else
 159         case 64: break;
 160         case 32: target = "i386";
 161 #endif
 162             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 163             child_name = tcc_basename(child_path);
 164             strcpy(child_name, target);
 165 #ifdef TCC_TARGET_PE
 166             strcat(child_name, "-win32");
 167 #endif
 168             strcat(child_name, "-tcc");
 169             if (strcmp(argv[0], child_path)) {
 170                 if (s->verbose > 0)
 171                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 172                 execvp(argv[0] = child_path, argv);
 173             }
 174             tcc_error("'%s' not found", child_name);
 175         case 0: /* ignore -march etc. */
 176             break;
 177         default:
 178             tcc_warning("unsupported option \"-m%s\"", optarg);
 179     }
 180 }
 181 #else
 182 #define exec_other_tcc(s, argv, optarg)
 183 #endif
 184
 185 static void gen_makedeps(TCCState *s, const char *target, const char *filename)
 186 {
 187     FILE *depout;
 188     char buf[1024], *ext;
 189     int i;
 190
 191     if (!filename) {
 192         /* compute filename automatically
 193          * dir/file.o -> dir/file.d             */
 194         pstrcpy(buf, sizeof(buf), target);
 195         ext = tcc_fileextension(buf);
 196         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
 197         filename = buf;
 198     }
 199
 200     if (s->verbose)
 201         printf("<- %s\n", filename);
 202
 203     /* XXX return err codes instead of error() ? */
 204     depout = fopen(filename, "w");
 205     if (!depout)
 206         tcc_error("could not open '%s'", filename);
 207
 208     fprintf(depout, "%s : \\\n", target);
 209     for (i=0; i<s->nb_target_deps; ++i)
 210         fprintf(depout, " %s \\\n", s->target_deps[i]);
 211     fprintf(depout, "\n");
 212     fclose(depout);
 213 }
 214
 215 static char *default_outputfile(TCCState *s, const char *first_file)
 216 {
 217     char buf[1024];
 218     char *ext;
 219     const char *name = "a";
 220
 221     if (first_file && strcmp(first_file, "-"))
 222         name = tcc_basename(first_file);
 223     pstrcpy(buf, sizeof(buf), name);
 224     ext = tcc_fileextension(buf);
 225 #ifdef TCC_TARGET_PE
 226     if (s->output_type == TCC_OUTPUT_DLL)
 227         strcpy(ext, ".dll");
 228     else
 229     if (s->output_type == TCC_OUTPUT_EXE)
 230         strcpy(ext, ".exe");
 231     else
 232 #endif
 233     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) ||
 234           (s->output_type == TCC_OUTPUT_PREPROCESS) )
 235         && *ext)
 236         strcpy(ext, ".o");
 237     else
 238         strcpy(buf, "a.out");
 239
 240     return tcc_strdup(buf);
 241 }
 242
 243 static int64_t getclock_us(void)
 244 {
 245 #ifdef _WIN32
 246     struct _timeb tb;
 247     _ftime(&tb);
 248     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 249 #else
 250     struct timeval tv;
 251     gettimeofday(&tv, NULL);
 252     return tv.tv_sec * 1000000LL + tv.tv_usec;
 253 #endif
 254 }
 255
 256 int main(int argc, char **argv)
 257 {
 258     TCCState *s;
 259     int ret, optind, i, bench;
 260     int64_t start_time = 0;
 261     const char *first_file = NULL;
 262
 263     s = tcc_new();
 264
 265     optind = tcc_parse_args(s, argc - 1, argv + 1);
 266     tcc_set_environment(s);
 267
 268     if (optind == 0) {
 269         help(s);
 270         return 1;
 271     }
 272
 273     if (s->output_type == 0)
 274         s->output_type = TCC_OUTPUT_EXE;
 275
 276     if (s->option_m)
 277         exec_other_tcc(s, argv, s->option_m);
 278
 279     if (s->verbose)
 280         display_info(s, 0);
 281
 282     if (s->print_search_dirs || (s->verbose == 2 && optind == 1)) {
 283         tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
 284         display_info(s, 1);
 285         return 0;
 286     }
 287
 288     if (s->verbose && optind == 1)
 289         return 0;
 290
 291     if (s->nb_files == 0)
 292         tcc_error("no input files\n");
 293
 294     /* check -c consistency : only single file handled. XXX: checks file type */
 295     if (s->output_type == TCC_OUTPUT_OBJ && !s->option_r) {
 296         if (s->nb_libraries != 0)
 297             tcc_error("cannot specify libraries with -c");
 298         /* accepts only a single input file */
 299         if (s->nb_files != 1)
 300             tcc_error("cannot specify multiple files with -c");
 301     }
 302
 303     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 304         if (!s->outfile) {
 305             s->ppfp = stdout;
 306         } else {
 307             s->ppfp = fopen(s->outfile, "w");
 308             if (!s->ppfp)
 309                 tcc_error("could not write '%s'", s->outfile);
 310         }
 311     }
 312
 313     bench = s->do_bench;
 314     if (bench)
 315         start_time = getclock_us();
 316
 317     tcc_set_output_type(s, s->output_type);
 318     if (s->output_type == TCC_OUTPUT_PREPROCESS)
 319         print_defines();
 320
 321     /* compile or add each files or library */
 322     for(i = ret = 0; i < s->nb_files && ret == 0; i++) {
 323         const char *filename;
 324
 325         filename = s->files[i];
 326         if (filename[0] == '-' && filename[1] == 'l') {
 327             if (tcc_add_library(s, filename + 2) < 0) {
 328                 tcc_error_noabort("cannot find '%s'", filename);
 329                 ret = 1;
 330             }
 331         } else {
 332             if (1 == s->verbose)
 333                 printf("-> %s\n", filename);
 334             if (tcc_add_file(s, filename) < 0)
 335                 ret = 1;
 336             if (!first_file)
 337                 first_file = filename;
 338         }
 339     }
 340
 341     if (0 == ret) {
 342         if (bench)
 343             tcc_print_stats(s, getclock_us() - start_time);
 344
 345         if (s->output_type == TCC_OUTPUT_MEMORY) {
 346 #ifdef TCC_IS_NATIVE
 347             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 348 #else
 349             tcc_error_noabort("-run is not available in a cross compiler");
 350             ret = 1;
 351 #endif
 352         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 353              if (s->outfile)
 354                 fclose(s->ppfp);
 355         } else {
 356             if (!s->outfile)
 357                 s->outfile = default_outputfile(s, first_file);
 358             ret = !!tcc_output_file(s, s->outfile);
 359             /* dump collected dependencies */
 360             if (s->gen_deps && !ret)
 361                 gen_makedeps(s, s->outfile, s->deps_outfile);
 362         }
 363     }
 364
 365     tcc_delete(s);
 366     if (bench)
 367         tcc_memstats();
 368     return ret;
 369 }