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 char *ssuffix(const char *oldname, const char sep)
 232 {
 233     char *p, *name = tcc_strdup(oldname);
 234     p = strchr(name, sep);
 235     if (p)
 236         return p + 1;
 237     /* prefix "win32-" when file extension is present */
 238     if (*tcc_fileextension(name)){
 239         name = tcc_realloc(name, strlen(oldname + 7));
 240         sprintf(name, "win32-%s", oldname);
 241     }
 242     return name;
 243 }
 244
 245 static void exec_other_tcc(TCCState *s, int argc,
 246     char **argv,const char *optarg, int optind)
 247 {
 248     char child_path[4096],child_name[4096];
 249     char *parent,*child_tcc;
 250     int opt = atoi(optarg);
 251     if (strlen(argv[0]) > 4000)
 252         error("-m%i unsafe path length", ARG);
 253     switch (opt) {
 254         case ARG + 1: /* oops we called ourselves */
 255             error("-m%i cross compiler not installed", ARG);
 256             break;
 257         case ARG:
 258         {
 259             parent = tcc_basename(argv[0]);
 260             child_tcc = ssuffix(parent,'-');
 261             sprintf(child_name, CHILD "-%s", child_tcc);
 262             tcc_free(child_tcc);
 263             if (strcmp(parent, child_name)) {
 264                 /* child_path = dirname */
 265                 pstrcpy(child_path, parent - argv[0] + 1, argv[0]);
 266                 child_tcc = strchr(child_path, 0);
 267                 strcpy(child_tcc, child_name);
 268                 if (0 < s->verbose)
 269                     printf("%s -m%i -> %s\n",
 270                          parent, ARG, child_path);
 271                 sprintf(argv[optind],"-m%i", ARG + 1); /* no loop */
 272                 execvp(child_path, CAST argv);
 273                 sprintf(child_tcc,"tcc%s",tcc_fileextension(parent));
 274                 execvp(child_path, CAST argv);
 275                 error("-m%i cross compiler not found", ARG);
 276             } else error("-m%i unsupported configuration", ARG);
 277         }
 278         case 96 ^  ARG     : break;
 279         case 96 ^ (ARG + 1): break;
 280         default:
 281             warning("usupported option \"-m%s\"",optarg);
 282     }
 283 }
 284 #undef CAST
 285 #undef ARG
 286 #undef CHILD
 287 #endif
 288
 289 static int parse_args(TCCState *s, int argc, char **argv)
 290 {
 291     int optind;
 292     const TCCOption *popt;
 293     const char *optarg, *p1, *r1;
 294     char *r;
 295
 296     optind = 0;
 297     while (optind < argc) {
 298
 299         r = argv[optind++];
 300         if (r[0] != '-' || r[1] == '\0') {
 301             /* add a new file */
 302             dynarray_add((void ***)&files, &nb_files, r);
 303             if (!multiple_files) {
 304                 optind--;
 305                 /* argv[0] will be this file */
 306                 break;
 307             }
 308         } else {
 309             /* find option in table (match only the first chars */
 310             popt = tcc_options;
 311             for(;;) {
 312                 p1 = popt->name;
 313                 if (p1 == NULL)
 314                     error("invalid option -- '%s'", r);
 315                 r1 = r + 1;
 316                 for(;;) {
 317                     if (*p1 == '\0')
 318                         goto option_found;
 319                     if (*r1 != *p1)
 320                         break;
 321                     p1++;
 322                     r1++;
 323                 }
 324                 popt++;
 325             }
 326         option_found:
 327             if (popt->flags & TCC_OPTION_HAS_ARG) {
 328                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 329                     optarg = r1;
 330                 } else {
 331                     if (optind >= argc)
 332                         error("argument to '%s' is missing", r);
 333                     optarg = argv[optind++];
 334                 }
 335             } else {
 336                 if (*r1 != '\0')
 337                     return 0;
 338                 optarg = NULL;
 339             }
 340
 341             switch(popt->index) {
 342             case TCC_OPTION_HELP:
 343                 return 0;
 344
 345             case TCC_OPTION_I:
 346                 if (tcc_add_include_path(s, optarg) < 0)
 347                     error("too many include paths");
 348                 break;
 349             case TCC_OPTION_D:
 350                 {
 351                     char *sym, *value;
 352                     sym = (char *)optarg;
 353                     value = strchr(sym, '=');
 354                     if (value) {
 355                         *value = '\0';
 356                         value++;
 357                     }
 358                     tcc_define_symbol(s, sym, value);
 359                 }
 360                 break;
 361             case TCC_OPTION_U:
 362                 tcc_undefine_symbol(s, optarg);
 363                 break;
 364             case TCC_OPTION_L:
 365                 tcc_add_library_path(s, optarg);
 366                 break;
 367             case TCC_OPTION_B:
 368                 /* set tcc utilities path (mainly for tcc development) */
 369                 tcc_set_lib_path(s, optarg);
 370                 break;
 371             case TCC_OPTION_l:
 372                 dynarray_add((void ***)&files, &nb_files, r);
 373                 nb_libraries++;
 374                 break;
 375             case TCC_OPTION_pthread:
 376                 /* fixme: these options could be different on your platform */
 377                 if(output_type != TCC_OUTPUT_OBJ){
 378                     dynarray_add((void ***)&files, &nb_files, "-lpthread");
 379                     nb_libraries++;
 380                 }
 381                 tcc_define_symbol(s, "_REENTRANT", "1");
 382                 break;
 383             case TCC_OPTION_bench:
 384                 do_bench = 1;
 385                 break;
 386 #ifdef CONFIG_TCC_BACKTRACE
 387             case TCC_OPTION_bt:
 388                 set_num_callers(atoi(optarg));
 389                 break;
 390 #endif
 391 #ifdef CONFIG_TCC_BCHECK
 392             case TCC_OPTION_b:
 393                 s->do_bounds_check = 1;
 394                 s->do_debug = 1;
 395                 break;
 396 #endif
 397             case TCC_OPTION_g:
 398                 s->do_debug = 1;
 399                 break;
 400             case TCC_OPTION_c:
 401                 multiple_files = 1;
 402                 output_type = TCC_OUTPUT_OBJ;
 403                 break;
 404             case TCC_OPTION_static:
 405                 s->static_link = 1;
 406                 break;
 407             case TCC_OPTION_shared:
 408                 output_type = TCC_OUTPUT_DLL;
 409                 break;
 410             case TCC_OPTION_soname:
 411                 s->soname = optarg;
 412                 break;
 413 #if defined(TCC_TARGET_X86_64) || defined (TCC_TARGET_I386)
 414             case TCC_OPTION_m:
 415                     exec_other_tcc(s, argc+1, argv-1, optarg, optind);
 416                 break;
 417 #endif
 418             case TCC_OPTION_o:
 419                 multiple_files = 1;
 420                 outfile = optarg;
 421                 break;
 422             case TCC_OPTION_r:
 423                 /* generate a .o merging several output files */
 424                 reloc_output = 1;
 425                 output_type = TCC_OUTPUT_OBJ;
 426                 break;
 427             case TCC_OPTION_nostdinc:
 428                 s->nostdinc = 1;
 429                 break;
 430             case TCC_OPTION_nostdlib:
 431                 s->nostdlib = 1;
 432                 break;
 433             case TCC_OPTION_print_search_dirs:
 434                 print_search_dirs = 1;
 435                 break;
 436             case TCC_OPTION_run:
 437                 {
 438                     int argc1;
 439                     char **argv1;
 440                     argc1 = expand_args(&argv1, optarg);
 441                     if (argc1 > 0) {
 442                         parse_args(s, argc1, argv1);
 443                     }
 444                     multiple_files = 0;
 445                     output_type = TCC_OUTPUT_MEMORY;
 446                 }
 447                 break;
 448             case TCC_OPTION_v:
 449                 do {
 450                     if (0 == s->verbose++)
 451                         printf("tcc version %s\n", TCC_VERSION);
 452                 } while (*optarg++ == 'v');
 453                 break;
 454             case TCC_OPTION_f:
 455                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 456                     goto unsupported_option;
 457                 break;
 458             case TCC_OPTION_W:
 459                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 460                     s->warn_unsupported)
 461                     goto unsupported_option;
 462                 break;
 463             case TCC_OPTION_w:
 464                 s->warn_none = 1;
 465                 break;
 466             case TCC_OPTION_rdynamic:
 467                 s->rdynamic = 1;
 468                 break;
 469             case TCC_OPTION_Wl:
 470                 {
 471                     if ((r = (char *) tcc_set_linker(s, (char *)optarg, TRUE)))
 472                         error("unsupported linker option '%s'", r);
 473                 }
 474                 break;
 475             case TCC_OPTION_E:
 476                 output_type = TCC_OUTPUT_PREPROCESS;
 477                 break;
 478             case TCC_OPTION_MD:
 479                 gen_deps = 1;
 480                 break;
 481             case TCC_OPTION_MF:
 482                 deps_outfile = optarg;
 483                 break;
 484             case TCC_OPTION_x:
 485                 break;
 486             default:
 487                 if (s->warn_unsupported) {
 488                 unsupported_option:
 489                     warning("unsupported option '%s'", r);
 490                 }
 491                 break;
 492             }
 493         }
 494     }
 495     return optind + 1;
 496 }
 497
 498 int main(int argc, char **argv)
 499 {
 500     int i;
 501     TCCState *s;
 502     int nb_objfiles, ret, optind;
 503     int64_t start_time = 0;
 504
 505     s = tcc_new();
 506
 507     output_type = TCC_OUTPUT_EXE;
 508     outfile = NULL;
 509     multiple_files = 1;
 510     files = NULL;
 511     nb_files = 0;
 512     nb_libraries = 0;
 513     reloc_output = 0;
 514     print_search_dirs = 0;
 515     ret = 0;
 516
 517     optind = parse_args(s, argc - 1, argv + 1);
 518     if (print_search_dirs) {
 519         /* enough for Linux kernel */
 520         printf("install: %s/\n", s->tcc_lib_path);
 521         return 0;
 522     }
 523     if (optind == 0 || nb_files == 0) {
 524         if (optind && s->verbose)
 525             return 0;
 526         help();
 527         return 1;
 528     }
 529
 530     nb_objfiles = nb_files - nb_libraries;
 531
 532     /* if outfile provided without other options, we output an
 533        executable */
 534     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 535         output_type = TCC_OUTPUT_EXE;
 536
 537     /* check -c consistency : only single file handled. XXX: checks file type */
 538     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 539         /* accepts only a single input file */
 540         if (nb_objfiles != 1)
 541             error("cannot specify multiple files with -c");
 542         if (nb_libraries != 0)
 543             error("cannot specify libraries with -c");
 544     }
 545
 546
 547     if (output_type == TCC_OUTPUT_PREPROCESS) {
 548         if (!outfile) {
 549             s->outfile = stdout;
 550         } else {
 551             s->outfile = fopen(outfile, "w");
 552             if (!s->outfile)
 553                 error("could not open '%s'", outfile);
 554         }
 555     }
 556
 557     if (do_bench) {
 558         start_time = getclock_us();
 559     }
 560
 561     tcc_set_output_type(s, output_type);
 562     s->reloc_output = reloc_output;
 563
 564     /* compile or add each files or library */
 565     for(i = 0; i < nb_files && ret == 0; i++) {
 566         const char *filename;
 567
 568         filename = files[i];
 569         if (filename[0] == '-' && filename[1] == 'l') {
 570             if (tcc_add_library(s, filename + 2) < 0) {
 571                 error_noabort("cannot find %s", filename);
 572                 ret = 1;
 573             }
 574         } else {
 575             if (1 == s->verbose)
 576                 printf("-> %s\n", filename);
 577             if (tcc_add_file(s, filename) < 0)
 578                 ret = 1;
 579         }
 580     }
 581
 582     /* free all files */
 583     tcc_free(files);
 584
 585     if (0 == ret) {
 586         if (do_bench)
 587             tcc_print_stats(s, getclock_us() - start_time);
 588
 589         if (s->output_type == TCC_OUTPUT_MEMORY)
 590             ret = tcc_run(s, argc - optind, argv + optind);
 591         else {
 592             if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 593                 if (outfile)
 594                     fclose(s->outfile);
 595             } else {
 596                 ret = tcc_output_file(s, outfile ? outfile : tcc_default_target(s));
 597                 ret = ret ? 1 : 0;
 598             }
 599
 600             /* dump collected dependencies */
 601             if (gen_deps && !ret)
 602                 tcc_gen_makedeps(s, outfile, deps_outfile);
 603         }
 604     }
 605
 606     tcc_delete(s);
 607
 608 #ifdef MEM_DEBUG
 609     if (do_bench) {
 610         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 611     }
 612 #endif
 613     return ret;
 614 }