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 #include "libtcc.c"
  22
  23 void help(void)
  24 {
  25     printf("tcc version " TCC_VERSION " - Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  26            "usage: tcc [-v] [-c] [-o outfile] [-Bdir] [-bench] [-Idir] [-Dsym[=val]] [-Usym]\n"
  27            "           [-Wwarn] [-g] [-b] [-bt N] [-Ldir] [-llib] [-shared] [-soname name]\n"
  28            "           [-static] [infile1 infile2...] [-run infile args...]\n"
  29            "\n"
  30            "General options:\n"
  31            "  -v          display current version, increase verbosity\n"
  32            "  -c          compile only - generate an object file\n"
  33            "  -o outfile  set output filename\n"
  34            "  -Bdir       set tcc internal library path\n"
  35            "  -bench      output compilation statistics\n"
  36            "  -run        run compiled source\n"
  37            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  38            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  39            "  -w          disable all warnings\n"
  40            "Preprocessor options:\n"
  41            "  -E          preprocess only\n"
  42            "  -Idir       add include path 'dir'\n"
  43            "  -Dsym[=val] define 'sym' with value 'val'\n"
  44            "  -Usym       undefine 'sym'\n"
  45            "Linker options:\n"
  46            "  -Ldir       add library path 'dir'\n"
  47            "  -llib       link with dynamic or static library 'lib'\n"
  48            "  -shared     generate a shared library\n"
  49            "  -soname     set name for shared library to be used at runtime\n"
  50            "  -static     static linking\n"
  51            "  -rdynamic   export all global symbols to dynamic linker\n"
  52            "  -r          generate (relocatable) object file\n"
  53            "Debugger options:\n"
  54            "  -g          generate runtime debug info\n"
  55 #ifdef CONFIG_TCC_BCHECK
  56            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  57 #endif
  58 #ifdef CONFIG_TCC_BACKTRACE
  59            "  -bt N       show N callers in stack traces\n"
  60 #endif
  61            );
  62 }
  63
  64 static char **files;
  65 static int nb_files, nb_libraries;
  66 static int multiple_files;
  67 static int print_search_dirs;
  68 static int output_type;
  69 static int reloc_output;
  70 static const char *outfile;
  71 static int do_bench = 0;
  72
  73 #define TCC_OPTION_HAS_ARG 0x0001
  74 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
  75
  76 typedef struct TCCOption {
  77     const char *name;
  78     uint16_t index;
  79     uint16_t flags;
  80 } TCCOption;
  81
  82 enum {
  83     TCC_OPTION_HELP,
  84     TCC_OPTION_I,
  85     TCC_OPTION_D,
  86     TCC_OPTION_U,
  87     TCC_OPTION_L,
  88     TCC_OPTION_B,
  89     TCC_OPTION_l,
  90     TCC_OPTION_bench,
  91     TCC_OPTION_bt,
  92     TCC_OPTION_b,
  93     TCC_OPTION_g,
  94     TCC_OPTION_c,
  95     TCC_OPTION_static,
  96     TCC_OPTION_shared,
  97     TCC_OPTION_soname,
  98     TCC_OPTION_o,
  99     TCC_OPTION_r,
 100     TCC_OPTION_Wl,
 101     TCC_OPTION_W,
 102     TCC_OPTION_O,
 103     TCC_OPTION_m,
 104     TCC_OPTION_f,
 105     TCC_OPTION_nostdinc,
 106     TCC_OPTION_nostdlib,
 107     TCC_OPTION_print_search_dirs,
 108     TCC_OPTION_rdynamic,
 109     TCC_OPTION_run,
 110     TCC_OPTION_v,
 111     TCC_OPTION_w,
 112     TCC_OPTION_pipe,
 113     TCC_OPTION_E,
 114 };
 115
 116 static const TCCOption tcc_options[] = {
 117     { "h", TCC_OPTION_HELP, 0 },
 118     { "?", TCC_OPTION_HELP, 0 },
 119     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
 120     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
 121     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
 122     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
 123     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
 124     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 125     { "bench", TCC_OPTION_bench, 0 },
 126     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
 127 #ifdef CONFIG_TCC_BCHECK
 128     { "b", TCC_OPTION_b, 0 },
 129 #endif
 130     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 131     { "c", TCC_OPTION_c, 0 },
 132     { "static", TCC_OPTION_static, 0 },
 133     { "shared", TCC_OPTION_shared, 0 },
 134     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
 135     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
 136     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 137     { "rdynamic", TCC_OPTION_rdynamic, 0 },
 138     { "r", TCC_OPTION_r, 0 },
 139     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 140     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 141     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 142     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
 143     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 144     { "nostdinc", TCC_OPTION_nostdinc, 0 },
 145     { "nostdlib", TCC_OPTION_nostdlib, 0 },
 146     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
 147     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 148     { "w", TCC_OPTION_w, 0 },
 149     { "pipe", TCC_OPTION_pipe, 0},
 150     { "E", TCC_OPTION_E, 0},
 151     { NULL },
 152 };
 153
 154 static int64_t getclock_us(void)
 155 {
 156 #ifdef _WIN32
 157     struct _timeb tb;
 158     _ftime(&tb);
 159     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 160 #else
 161     struct timeval tv;
 162     gettimeofday(&tv, NULL);
 163     return tv.tv_sec * 1000000LL + tv.tv_usec;
 164 #endif
 165 }
 166
 167 static int strstart(const char *str, const char *val, const char **ptr)
 168 {
 169     const char *p, *q;
 170     p = str;
 171     q = val;
 172     while (*q != '\0') {
 173         if (*p != *q)
 174             return 0;
 175         p++;
 176         q++;
 177     }
 178     if (ptr)
 179         *ptr = p;
 180     return 1;
 181 }
 182
 183 /* convert 'str' into an array of space separated strings */
 184 static int expand_args(char ***pargv, const char *str)
 185 {
 186     const char *s1;
 187     char **argv, *arg;
 188     int argc, len;
 189
 190     argc = 0;
 191     argv = NULL;
 192     for(;;) {
 193         while (is_space(*str))
 194             str++;
 195         if (*str == '\0')
 196             break;
 197         s1 = str;
 198         while (*str != '\0' && !is_space(*str))
 199             str++;
 200         len = str - s1;
 201         arg = tcc_malloc(len + 1);
 202         memcpy(arg, s1, len);
 203         arg[len] = '\0';
 204         dynarray_add((void ***)&argv, &argc, arg);
 205     }
 206     *pargv = argv;
 207     return argc;
 208 }
 209
 210 int parse_args(TCCState *s, int argc, char **argv)
 211 {
 212     int optind;
 213     const TCCOption *popt;
 214     const char *optarg, *p1, *r1;
 215     char *r;
 216
 217     optind = 0;
 218     while (optind < argc) {
 219
 220         r = argv[optind++];
 221         if (r[0] != '-' || r[1] == '\0') {
 222             /* add a new file */
 223             dynarray_add((void ***)&files, &nb_files, r);
 224             if (!multiple_files) {
 225                 optind--;
 226                 /* argv[0] will be this file */
 227                 break;
 228             }
 229         } else {
 230             /* find option in table (match only the first chars */
 231             popt = tcc_options;
 232             for(;;) {
 233                 p1 = popt->name;
 234                 if (p1 == NULL)
 235                     error("invalid option -- '%s'", r);
 236                 r1 = r + 1;
 237                 for(;;) {
 238                     if (*p1 == '\0')
 239                         goto option_found;
 240                     if (*r1 != *p1)
 241                         break;
 242                     p1++;
 243                     r1++;
 244                 }
 245                 popt++;
 246             }
 247         option_found:
 248             if (popt->flags & TCC_OPTION_HAS_ARG) {
 249                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 250                     optarg = r1;
 251                 } else {
 252                     if (optind >= argc)
 253                         error("argument to '%s' is missing", r);
 254                     optarg = argv[optind++];
 255                 }
 256             } else {
 257                 if (*r1 != '\0')
 258                     return 0;
 259                 optarg = NULL;
 260             }
 261
 262             switch(popt->index) {
 263             case TCC_OPTION_HELP:
 264                 return 0;
 265
 266             case TCC_OPTION_I:
 267                 if (tcc_add_include_path(s, optarg) < 0)
 268                     error("too many include paths");
 269                 break;
 270             case TCC_OPTION_D:
 271                 {
 272                     char *sym, *value;
 273                     sym = (char *)optarg;
 274                     value = strchr(sym, '=');
 275                     if (value) {
 276                         *value = '\0';
 277                         value++;
 278                     }
 279                     tcc_define_symbol(s, sym, value);
 280                 }
 281                 break;
 282             case TCC_OPTION_U:
 283                 tcc_undefine_symbol(s, optarg);
 284                 break;
 285             case TCC_OPTION_L:
 286                 tcc_add_library_path(s, optarg);
 287                 break;
 288             case TCC_OPTION_B:
 289                 /* set tcc utilities path (mainly for tcc development) */
 290                 tcc_set_lib_path(s, optarg);
 291                 break;
 292             case TCC_OPTION_l:
 293                 dynarray_add((void ***)&files, &nb_files, r);
 294                 nb_libraries++;
 295                 break;
 296             case TCC_OPTION_bench:
 297                 do_bench = 1;
 298                 break;
 299 #ifdef CONFIG_TCC_BACKTRACE
 300             case TCC_OPTION_bt:
 301                 num_callers = atoi(optarg);
 302                 break;
 303 #endif
 304 #ifdef CONFIG_TCC_BCHECK
 305             case TCC_OPTION_b:
 306                 s->do_bounds_check = 1;
 307                 s->do_debug = 1;
 308                 break;
 309 #endif
 310             case TCC_OPTION_g:
 311                 s->do_debug = 1;
 312                 break;
 313             case TCC_OPTION_c:
 314                 multiple_files = 1;
 315                 output_type = TCC_OUTPUT_OBJ;
 316                 break;
 317             case TCC_OPTION_static:
 318                 s->static_link = 1;
 319                 break;
 320             case TCC_OPTION_shared:
 321                 output_type = TCC_OUTPUT_DLL;
 322                 break;
 323             case TCC_OPTION_soname:
 324                 s->soname = optarg;
 325                 break;
 326             case TCC_OPTION_o:
 327                 multiple_files = 1;
 328                 outfile = optarg;
 329                 break;
 330             case TCC_OPTION_r:
 331                 /* generate a .o merging several output files */
 332                 reloc_output = 1;
 333                 output_type = TCC_OUTPUT_OBJ;
 334                 break;
 335             case TCC_OPTION_nostdinc:
 336                 s->nostdinc = 1;
 337                 break;
 338             case TCC_OPTION_nostdlib:
 339                 s->nostdlib = 1;
 340                 break;
 341             case TCC_OPTION_print_search_dirs:
 342                 print_search_dirs = 1;
 343                 break;
 344             case TCC_OPTION_run:
 345                 {
 346                     int argc1;
 347                     char **argv1;
 348                     argc1 = expand_args(&argv1, optarg);
 349                     if (argc1 > 0) {
 350                         parse_args(s, argc1, argv1);
 351                     }
 352                     multiple_files = 0;
 353                     output_type = TCC_OUTPUT_MEMORY;
 354                 }
 355                 break;
 356             case TCC_OPTION_v:
 357                 do {
 358                     if (0 == s->verbose++)
 359                         printf("tcc version %s\n", TCC_VERSION);
 360                 } while (*optarg++ == 'v');
 361                 break;
 362             case TCC_OPTION_f:
 363                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 364                     goto unsupported_option;
 365                 break;
 366             case TCC_OPTION_W:
 367                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 368                     s->warn_unsupported)
 369                     goto unsupported_option;
 370                 break;
 371             case TCC_OPTION_w:
 372                 s->warn_none = 1;
 373                 break;
 374             case TCC_OPTION_rdynamic:
 375                 s->rdynamic = 1;
 376                 break;
 377             case TCC_OPTION_Wl:
 378                 {
 379                     const char *p;
 380                     if (strstart(optarg, "-Ttext,", &p)) {
 381                         s->text_addr = strtoul(p, NULL, 16);
 382                         s->has_text_addr = 1;
 383                     } else if (strstart(optarg, "--oformat,", &p)) {
 384                         if (strstart(p, "elf32-", NULL)) {
 385                             s->output_format = TCC_OUTPUT_FORMAT_ELF;
 386                         } else if (!strcmp(p, "binary")) {
 387                             s->output_format = TCC_OUTPUT_FORMAT_BINARY;
 388                         } else
 389 #ifdef TCC_TARGET_COFF
 390                         if (!strcmp(p, "coff")) {
 391                             s->output_format = TCC_OUTPUT_FORMAT_COFF;
 392                         } else
 393 #endif
 394                         {
 395                             error("target %s not found", p);
 396                         }
 397                     } else {
 398                         error("unsupported linker option '%s'", optarg);
 399                     }
 400                 }
 401                 break;
 402             case TCC_OPTION_E:
 403                 output_type = TCC_OUTPUT_PREPROCESS;
 404                 break;
 405             default:
 406                 if (s->warn_unsupported) {
 407                 unsupported_option:
 408                     warning("unsupported option '%s'", r);
 409                 }
 410                 break;
 411             }
 412         }
 413     }
 414     return optind + 1;
 415 }
 416
 417 int main(int argc, char **argv)
 418 {
 419     int i;
 420     TCCState *s;
 421     int nb_objfiles, ret, optind;
 422     char objfilename[1024];
 423     int64_t start_time = 0;
 424
 425     s = tcc_new();
 426 #ifdef _WIN32
 427     tcc_set_lib_path_w32(s);
 428 #endif
 429     output_type = TCC_OUTPUT_EXE;
 430     outfile = NULL;
 431     multiple_files = 1;
 432     files = NULL;
 433     nb_files = 0;
 434     nb_libraries = 0;
 435     reloc_output = 0;
 436     print_search_dirs = 0;
 437     ret = 0;
 438
 439     optind = parse_args(s, argc - 1, argv + 1);
 440     if (print_search_dirs) {
 441         /* enough for Linux kernel */
 442         printf("install: %s/\n", s->tcc_lib_path);
 443         return 0;
 444     }
 445     if (optind == 0 || nb_files == 0) {
 446         if (optind && s->verbose)
 447             return 0;
 448         help();
 449         return 1;
 450     }
 451
 452     nb_objfiles = nb_files - nb_libraries;
 453
 454     /* if outfile provided without other options, we output an
 455        executable */
 456     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 457         output_type = TCC_OUTPUT_EXE;
 458
 459     /* check -c consistency : only single file handled. XXX: checks file type */
 460     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 461         /* accepts only a single input file */
 462         if (nb_objfiles != 1)
 463             error("cannot specify multiple files with -c");
 464         if (nb_libraries != 0)
 465             error("cannot specify libraries with -c");
 466     }
 467
 468
 469     if (output_type == TCC_OUTPUT_PREPROCESS) {
 470         if (!outfile) {
 471             s->outfile = stdout;
 472         } else {
 473             s->outfile = fopen(outfile, "w");
 474             if (!s->outfile)
 475                 error("could not open '%s", outfile);
 476         }
 477     } else if (output_type != TCC_OUTPUT_MEMORY) {
 478         if (!outfile) {
 479             /* compute default outfile name */
 480             char *ext;
 481             const char *name =
 482                 strcmp(files[0], "-") == 0 ? "a" : tcc_basename(files[0]);
 483             pstrcpy(objfilename, sizeof(objfilename), name);
 484             ext = tcc_fileextension(objfilename);
 485 #ifdef TCC_TARGET_PE
 486             if (output_type == TCC_OUTPUT_DLL)
 487                 strcpy(ext, ".dll");
 488             else
 489             if (output_type == TCC_OUTPUT_EXE)
 490                 strcpy(ext, ".exe");
 491             else
 492 #endif
 493             if (output_type == TCC_OUTPUT_OBJ && !reloc_output && *ext)
 494                 strcpy(ext, ".o");
 495             else
 496                 pstrcpy(objfilename, sizeof(objfilename), "a.out");
 497             outfile = objfilename;
 498         }
 499     }
 500
 501     if (do_bench) {
 502         start_time = getclock_us();
 503     }
 504
 505     tcc_set_output_type(s, output_type);
 506
 507     /* compile or add each files or library */
 508     for(i = 0; i < nb_files && ret == 0; i++) {
 509         const char *filename;
 510
 511         filename = files[i];
 512         if (filename[0] == '-' && filename[1]) {
 513             if (tcc_add_library(s, filename + 2) < 0) {
 514                 error_noabort("cannot find %s", filename);
 515                 ret = 1;
 516             }
 517         } else {
 518             if (1 == s->verbose)
 519                 printf("-> %s\n", filename);
 520             if (tcc_add_file(s, filename) < 0)
 521                 ret = 1;
 522         }
 523     }
 524
 525     /* free all files */
 526     tcc_free(files);
 527
 528     if (ret)
 529         goto the_end;
 530
 531     if (do_bench)
 532         tcc_print_stats(s, getclock_us() - start_time);
 533
 534     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 535         if (outfile)
 536             fclose(s->outfile);
 537     } else if (s->output_type == TCC_OUTPUT_MEMORY) {
 538         ret = tcc_run(s, argc - optind, argv + optind);
 539     } else
 540         ret = tcc_output_file(s, outfile) ? 1 : 0;
 541  the_end:
 542     /* XXX: cannot do it with bound checking because of the malloc hooks */
 543     if (!s->do_bounds_check)
 544         tcc_delete(s);
 545
 546 #ifdef MEM_DEBUG
 547     if (do_bench) {
 548         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 549     }
 550 #endif
 551     return ret;
 552 }
 553