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 #if defined NOTALLINONE || defined TCC_USE_LIBTCC
  22 #include "tcc.h"
  23 #else
  24 #include "libtcc.c"
  25 #endif
  26
  27 static char **files;
  28 static int nb_files, nb_libraries;
  29 static int multiple_files;
  30 static int print_search_dirs;
  31 static int output_type;
  32 static int reloc_output;
  33 static const char *outfile;
  34 static int do_bench = 0;
  35 static int gen_deps;
  36 static const char *deps_outfile;
  37
  38 #define TCC_OPTION_HAS_ARG 0x0001
  39 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
  40
  41 static void help(void)
  42 {
  43     printf("tcc version " TCC_VERSION " - Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  44            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  45            "       tcc [options...] -run infile [arguments...]\n"
  46            "General options:\n"
  47            "  -v          display current version, increase verbosity\n"
  48            "  -c          compile only - generate an object file\n"
  49            "  -o outfile  set output filename\n"
  50            "  -Bdir       set tcc internal library path\n"
  51            "  -bench      output compilation statistics\n"
  52            "  -run        run compiled source\n"
  53            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  54            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  55            "  -w          disable all warnings\n"
  56            "Preprocessor options:\n"
  57            "  -E          preprocess only\n"
  58            "  -Idir       add include path 'dir'\n"
  59            "  -Dsym[=val] define 'sym' with value 'val'\n"
  60            "  -Usym       undefine 'sym'\n"
  61            "Linker options:\n"
  62            "  -Ldir       add library path 'dir'\n"
  63            "  -llib       link with dynamic or static library 'lib'\n"
  64            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
  65            "  -shared     generate a shared library\n"
  66            "  -soname     set name for shared library to be used at runtime\n"
  67            "  -static     static linking\n"
  68            "  -rdynamic   export all global symbols to dynamic linker\n"
  69            "  -r          generate (relocatable) object file\n"
  70            "Debugger options:\n"
  71            "  -g          generate runtime debug info\n"
  72 #ifdef CONFIG_TCC_BCHECK
  73            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  74 #endif
  75 #ifdef CONFIG_TCC_BACKTRACE
  76            "  -bt N       show N callers in stack traces\n"
  77 #endif
  78            "Misc options:\n"
  79            "  -MD         generate target dependencies for make\n"
  80            "  -MF depfile put generated dependencies here\n"
  81            );
  82 }
  83
  84 typedef struct TCCOption {
  85     const char *name;
  86     uint16_t index;
  87     uint16_t flags;
  88 } TCCOption;
  89
  90 enum {
  91     TCC_OPTION_HELP,
  92     TCC_OPTION_I,
  93     TCC_OPTION_D,
  94     TCC_OPTION_U,
  95     TCC_OPTION_L,
  96     TCC_OPTION_B,
  97     TCC_OPTION_l,
  98     TCC_OPTION_bench,
  99     TCC_OPTION_bt,
 100     TCC_OPTION_b,
 101     TCC_OPTION_g,
 102     TCC_OPTION_c,
 103     TCC_OPTION_static,
 104     TCC_OPTION_shared,
 105     TCC_OPTION_soname,
 106     TCC_OPTION_o,
 107     TCC_OPTION_r,
 108     TCC_OPTION_s,
 109     TCC_OPTION_Wl,
 110     TCC_OPTION_W,
 111     TCC_OPTION_O,
 112     TCC_OPTION_m,
 113     TCC_OPTION_f,
 114     TCC_OPTION_nostdinc,
 115     TCC_OPTION_nostdlib,
 116     TCC_OPTION_print_search_dirs,
 117     TCC_OPTION_rdynamic,
 118     TCC_OPTION_pthread,
 119     TCC_OPTION_run,
 120     TCC_OPTION_v,
 121     TCC_OPTION_w,
 122     TCC_OPTION_pipe,
 123     TCC_OPTION_E,
 124     TCC_OPTION_MD,
 125     TCC_OPTION_MF,
 126     TCC_OPTION_x,
 127 };
 128
 129 static const TCCOption tcc_options[] = {
 130     { "h", TCC_OPTION_HELP, 0 },
 131     { "-help", TCC_OPTION_HELP, 0 },
 132     { "?", TCC_OPTION_HELP, 0 },
 133     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
 134     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
 135     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
 136     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
 137     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
 138     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 139     { "bench", TCC_OPTION_bench, 0 },
 140 #ifdef CONFIG_TCC_BACKTRACE
 141     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
 142 #endif
 143 #ifdef CONFIG_TCC_BCHECK
 144     { "b", TCC_OPTION_b, 0 },
 145 #endif
 146     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 147     { "c", TCC_OPTION_c, 0 },
 148     { "static", TCC_OPTION_static, 0 },
 149     { "shared", TCC_OPTION_shared, 0 },
 150     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
 151     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
 152     { "pthread", TCC_OPTION_pthread, 0},
 153     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 154     { "rdynamic", TCC_OPTION_rdynamic, 0 },
 155     { "r", TCC_OPTION_r, 0 },
 156     { "s", TCC_OPTION_s, 0 },
 157     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 158     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 159     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 160     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
 161     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 162     { "nostdinc", TCC_OPTION_nostdinc, 0 },
 163     { "nostdlib", TCC_OPTION_nostdlib, 0 },
 164     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
 165     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 166     { "w", TCC_OPTION_w, 0 },
 167     { "pipe", TCC_OPTION_pipe, 0},
 168     { "E", TCC_OPTION_E, 0},
 169     { "MD", TCC_OPTION_MD, 0},
 170     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
 171     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
 172     { NULL },
 173 };
 174
 175 static int64_t getclock_us(void)
 176 {
 177 #ifdef _WIN32
 178     struct _timeb tb;
 179     _ftime(&tb);
 180     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 181 #else
 182     struct timeval tv;
 183     gettimeofday(&tv, NULL);
 184     return tv.tv_sec * 1000000LL + tv.tv_usec;
 185 #endif
 186 }
 187
 188 /* convert 'str' into an array of space separated strings */
 189 static int expand_args(char ***pargv, const char *str)
 190 {
 191     const char *s1;
 192     char **argv, *arg;
 193     int argc, len;
 194
 195     argc = 0;
 196     argv = NULL;
 197     for(;;) {
 198         while (is_space(*str))
 199             str++;
 200         if (*str == '\0')
 201             break;
 202         s1 = str;
 203         while (*str != '\0' && !is_space(*str))
 204             str++;
 205         len = str - s1;
 206         arg = tcc_malloc(len + 1);
 207         memcpy(arg, s1, len);
 208         arg[len] = '\0';
 209         dynarray_add((void ***)&argv, &argc, arg);
 210     }
 211     *pargv = argv;
 212     return argc;
 213 }
 214
 215 #if defined(TCC_TARGET_X86_64) || defined (TCC_TARGET_I386)
 216
 217 #ifdef _WIN32
 218 #define CAST (const char * const *)
 219 #else
 220 #define CAST (char * const *)
 221 #endif
 222
 223 #if defined(TCC_TARGET_X86_64)
 224 #define ARG 32
 225 #define CHILD "i386"
 226 #elif defined (TCC_TARGET_I386)
 227 #define ARG 64
 228 #define CHILD "x86_64"
 229 #endif
 230
 231 static const char *ssuffix(const char *name, const char sep)
 232 {
 233     char *p = strchr(name, sep);
 234     return p?p+1:name;
 235 }
 236
 237 static void exec_other_tcc(TCCState *s, int argc,
 238     char **argv,const char *optarg, int optind)
 239 {
 240     char child_path[4096],child_name[4096];
 241     char *parent,*child_tcc;
 242     int opt = atoi(optarg);
 243     if (strlen(argv[0]) > 4000)
 244         error("-m32/64 unsafe path length");
 245     switch (opt) {
 246         case ARG + 1: /* oops we called ourselves */
 247             error("-m32/64 cross compiler not installed");
 248             break;
 249         case ARG:
 250         {
 251             parent = tcc_basename(argv[0]);
 252             sprintf(child_name, CHILD "-%s", ssuffix(parent,'-'));
 253             if (strcmp(parent, child_name)) {
 254                 /* child_path = dirname */
 255                 pstrcpy(child_path, parent - argv[0] + 1, argv[0]);
 256                 child_tcc = strchr(child_path, 0);
 257                 strcpy(child_tcc, child_name);
 258                 if (0 < s->verbose)
 259                     printf("%s -m%i -> %s\n",
 260                          parent, ARG, child_path);
 261                 sprintf(argv[optind],"-m%i", ARG + 1); /* no loop */
 262                 execvp(child_path, CAST argv);
 263                 sprintf(child_tcc,"tcc%s",tcc_fileextension(parent));
 264                 execvp(child_path, CAST argv);
 265                 error("-m32/64 cross compiler not found");
 266             } else error("-m32/65 unsupported configuration");
 267         }
 268         case 96 ^  ARG     : break;
 269         case 96 ^ (ARG + 1): break;
 270         default:
 271             warning("usupported option \"-m%s\"",optarg);
 272     }
 273 }
 274 #undef CAST
 275 #undef ARG
 276 #undef CHILD
 277 #endif
 278
 279 static int parse_args(TCCState *s, int argc, char **argv)
 280 {
 281     int optind;
 282     const TCCOption *popt;
 283     const char *optarg, *p1, *r1;
 284     char *r;
 285
 286     optind = 0;
 287     while (optind < argc) {
 288
 289         r = argv[optind++];
 290         if (r[0] != '-' || r[1] == '\0') {
 291             /* add a new file */
 292             dynarray_add((void ***)&files, &nb_files, r);
 293             if (!multiple_files) {
 294                 optind--;
 295                 /* argv[0] will be this file */
 296                 break;
 297             }
 298         } else {
 299             /* find option in table (match only the first chars */
 300             popt = tcc_options;
 301             for(;;) {
 302                 p1 = popt->name;
 303                 if (p1 == NULL)
 304                     error("invalid option -- '%s'", r);
 305                 r1 = r + 1;
 306                 for(;;) {
 307                     if (*p1 == '\0')
 308                         goto option_found;
 309                     if (*r1 != *p1)
 310                         break;
 311                     p1++;
 312                     r1++;
 313                 }
 314                 popt++;
 315             }
 316         option_found:
 317             if (popt->flags & TCC_OPTION_HAS_ARG) {
 318                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 319                     optarg = r1;
 320                 } else {
 321                     if (optind >= argc)
 322                         error("argument to '%s' is missing", r);
 323                     optarg = argv[optind++];
 324                 }
 325             } else {
 326                 if (*r1 != '\0')
 327                     return 0;
 328                 optarg = NULL;
 329             }
 330
 331             switch(popt->index) {
 332             case TCC_OPTION_HELP:
 333                 return 0;
 334
 335             case TCC_OPTION_I:
 336                 if (tcc_add_include_path(s, optarg) < 0)
 337                     error("too many include paths");
 338                 break;
 339             case TCC_OPTION_D:
 340                 {
 341                     char *sym, *value;
 342                     sym = (char *)optarg;
 343                     value = strchr(sym, '=');
 344                     if (value) {
 345                         *value = '\0';
 346                         value++;
 347                     }
 348                     tcc_define_symbol(s, sym, value);
 349                 }
 350                 break;
 351             case TCC_OPTION_U:
 352                 tcc_undefine_symbol(s, optarg);
 353                 break;
 354             case TCC_OPTION_L:
 355                 tcc_add_library_path(s, optarg);
 356                 break;
 357             case TCC_OPTION_B:
 358                 /* set tcc utilities path (mainly for tcc development) */
 359                 tcc_set_lib_path(s, optarg);
 360                 break;
 361             case TCC_OPTION_l:
 362                 dynarray_add((void ***)&files, &nb_files, r);
 363                 nb_libraries++;
 364                 break;
 365             case TCC_OPTION_pthread:
 366                 /* fixme: these options could be different on your platform */
 367                 if(output_type != TCC_OUTPUT_OBJ){
 368                     dynarray_add((void ***)&files, &nb_files, "-lpthread");
 369                     nb_libraries++;
 370                 }
 371                 tcc_define_symbol(s, "_REENTRANT", "1");
 372                 break;
 373             case TCC_OPTION_bench:
 374                 do_bench = 1;
 375                 break;
 376 #ifdef CONFIG_TCC_BACKTRACE
 377             case TCC_OPTION_bt:
 378                 set_num_callers(atoi(optarg));
 379                 break;
 380 #endif
 381 #ifdef CONFIG_TCC_BCHECK
 382             case TCC_OPTION_b:
 383                 s->do_bounds_check = 1;
 384                 s->do_debug = 1;
 385                 break;
 386 #endif
 387             case TCC_OPTION_g:
 388                 s->do_debug = 1;
 389                 break;
 390             case TCC_OPTION_c:
 391                 multiple_files = 1;
 392                 output_type = TCC_OUTPUT_OBJ;
 393                 break;
 394             case TCC_OPTION_static:
 395                 s->static_link = 1;
 396                 break;
 397             case TCC_OPTION_shared:
 398                 output_type = TCC_OUTPUT_DLL;
 399                 break;
 400             case TCC_OPTION_soname:
 401                 s->soname = optarg;
 402                 break;
 403 #if defined(TCC_TARGET_X86_64) || defined (TCC_TARGET_I386)
 404             case TCC_OPTION_m:
 405                     exec_other_tcc(s, argc+1, argv-1, optarg, optind);
 406                 break;
 407 #endif
 408             case TCC_OPTION_o:
 409                 multiple_files = 1;
 410                 outfile = optarg;
 411                 break;
 412             case TCC_OPTION_r:
 413                 /* generate a .o merging several output files */
 414                 reloc_output = 1;
 415                 output_type = TCC_OUTPUT_OBJ;
 416                 break;
 417             case TCC_OPTION_nostdinc:
 418                 s->nostdinc = 1;
 419                 break;
 420             case TCC_OPTION_nostdlib:
 421                 s->nostdlib = 1;
 422                 break;
 423             case TCC_OPTION_print_search_dirs:
 424                 print_search_dirs = 1;
 425                 break;
 426             case TCC_OPTION_run:
 427                 {
 428                     int argc1;
 429                     char **argv1;
 430                     argc1 = expand_args(&argv1, optarg);
 431                     if (argc1 > 0) {
 432                         parse_args(s, argc1, argv1);
 433                     }
 434                     multiple_files = 0;
 435                     output_type = TCC_OUTPUT_MEMORY;
 436                 }
 437                 break;
 438             case TCC_OPTION_v:
 439                 do {
 440                     if (0 == s->verbose++)
 441                         printf("tcc version %s\n", TCC_VERSION);
 442                 } while (*optarg++ == 'v');
 443                 break;
 444             case TCC_OPTION_f:
 445                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 446                     goto unsupported_option;
 447                 break;
 448             case TCC_OPTION_W:
 449                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 450                     s->warn_unsupported)
 451                     goto unsupported_option;
 452                 break;
 453             case TCC_OPTION_w:
 454                 s->warn_none = 1;
 455                 break;
 456             case TCC_OPTION_rdynamic:
 457                 s->rdynamic = 1;
 458                 break;
 459             case TCC_OPTION_Wl:
 460                 {
 461                     if ((r = (char *) tcc_set_linker(s, (char *)optarg, TRUE)))
 462                         error("unsupported linker option '%s'", r);
 463                 }
 464                 break;
 465             case TCC_OPTION_E:
 466                 output_type = TCC_OUTPUT_PREPROCESS;
 467                 break;
 468             case TCC_OPTION_MD:
 469                 gen_deps = 1;
 470                 break;
 471             case TCC_OPTION_MF:
 472                 deps_outfile = optarg;
 473                 break;
 474             case TCC_OPTION_x:
 475                 break;
 476             default:
 477                 if (s->warn_unsupported) {
 478                 unsupported_option:
 479                     warning("unsupported option '%s'", r);
 480                 }
 481                 break;
 482             }
 483         }
 484     }
 485     return optind + 1;
 486 }
 487
 488 int main(int argc, char **argv)
 489 {
 490     int i;
 491     TCCState *s;
 492     int nb_objfiles, ret, optind;
 493     int64_t start_time = 0;
 494
 495     s = tcc_new();
 496
 497     output_type = TCC_OUTPUT_EXE;
 498     outfile = NULL;
 499     multiple_files = 1;
 500     files = NULL;
 501     nb_files = 0;
 502     nb_libraries = 0;
 503     reloc_output = 0;
 504     print_search_dirs = 0;
 505     ret = 0;
 506
 507     optind = parse_args(s, argc - 1, argv + 1);
 508     if (print_search_dirs) {
 509         /* enough for Linux kernel */
 510         printf("install: %s/\n", s->tcc_lib_path);
 511         return 0;
 512     }
 513     if (optind == 0 || nb_files == 0) {
 514         if (optind && s->verbose)
 515             return 0;
 516         help();
 517         return 1;
 518     }
 519
 520     nb_objfiles = nb_files - nb_libraries;
 521
 522     /* if outfile provided without other options, we output an
 523        executable */
 524     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 525         output_type = TCC_OUTPUT_EXE;
 526
 527     /* check -c consistency : only single file handled. XXX: checks file type */
 528     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 529         /* accepts only a single input file */
 530         if (nb_objfiles != 1)
 531             error("cannot specify multiple files with -c");
 532         if (nb_libraries != 0)
 533             error("cannot specify libraries with -c");
 534     }
 535
 536
 537     if (output_type == TCC_OUTPUT_PREPROCESS) {
 538         if (!outfile) {
 539             s->outfile = stdout;
 540         } else {
 541             s->outfile = fopen(outfile, "w");
 542             if (!s->outfile)
 543                 error("could not open '%s'", outfile);
 544         }
 545     }
 546
 547     if (do_bench) {
 548         start_time = getclock_us();
 549     }
 550
 551     tcc_set_output_type(s, output_type);
 552     s->reloc_output = reloc_output;
 553
 554     /* compile or add each files or library */
 555     for(i = 0; i < nb_files && ret == 0; i++) {
 556         const char *filename;
 557
 558         filename = files[i];
 559         if (filename[0] == '-' && filename[1] == 'l') {
 560             if (tcc_add_library(s, filename + 2) < 0) {
 561                 error_noabort("cannot find %s", filename);
 562                 ret = 1;
 563             }
 564         } else {
 565             if (1 == s->verbose)
 566                 printf("-> %s\n", filename);
 567             if (tcc_add_file(s, filename) < 0)
 568                 ret = 1;
 569         }
 570     }
 571
 572     /* free all files */
 573     tcc_free(files);
 574
 575     if (0 == ret) {
 576         if (do_bench)
 577             tcc_print_stats(s, getclock_us() - start_time);
 578
 579         if (s->output_type == TCC_OUTPUT_MEMORY)
 580             ret = tcc_run(s, argc - optind, argv + optind);
 581         else {
 582             if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 583                 if (outfile)
 584                     fclose(s->outfile);
 585             } else {
 586                 ret = tcc_output_file(s, outfile ? outfile : tcc_default_target(s));
 587                 ret = ret ? 1 : 0;
 588             }
 589
 590             /* dump collected dependencies */
 591             if (gen_deps && !ret)
 592                 tcc_gen_makedeps(s, outfile, deps_outfile);
 593         }
 594     }
 595
 596     tcc_delete(s);
 597
 598 #ifdef MEM_DEBUG
 599     if (do_bench) {
 600         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 601     }
 602 #endif
 603     return ret;
 604 }