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 TCC_USE_LIBTCC
  22 #include "tcc.h"
  23 #else
  24 #include "libtcc.c"
  25 #endif
  26
  27 void help(void)
  28 {
  29     printf("tcc version " TCC_VERSION " - Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  30            "usage: tcc [-v] [-c] [-o outfile] [-Bdir] [-bench] [-Idir] [-Dsym[=val]] [-Usym]\n"
  31            "           [-Wwarn] [-g] [-b] [-bt N] [-Ldir] [-llib] [-shared] [-soname name]\n"
  32            "           [-static] [infile1 infile2...] [-run infile args...]\n"
  33            "\n"
  34            "General options:\n"
  35            "  -v          display current version, increase verbosity\n"
  36            "  -c          compile only - generate an object file\n"
  37            "  -o outfile  set output filename\n"
  38            "  -Bdir       set tcc internal library path\n"
  39            "  -bench      output compilation statistics\n"
  40            "  -run        run compiled source\n"
  41            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  42            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  43            "  -w          disable all warnings\n"
  44            "Preprocessor options:\n"
  45            "  -E          preprocess only\n"
  46            "  -Idir       add include path 'dir'\n"
  47            "  -Dsym[=val] define 'sym' with value 'val'\n"
  48            "  -Usym       undefine 'sym'\n"
  49            "Linker options:\n"
  50            "  -Ldir       add library path 'dir'\n"
  51            "  -llib       link with dynamic or static library 'lib'\n"
  52            "  -shared     generate a shared library\n"
  53            "  -soname     set name for shared library to be used at runtime\n"
  54            "  -static     static linking\n"
  55            "  -rdynamic   export all global symbols to dynamic linker\n"
  56            "  -r          generate (relocatable) object file\n"
  57            "Debugger options:\n"
  58            "  -g          generate runtime debug info\n"
  59 #ifdef CONFIG_TCC_BCHECK
  60            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  61 #endif
  62 #ifdef CONFIG_TCC_BACKTRACE
  63            "  -bt N       show N callers in stack traces\n"
  64 #endif
  65            );
  66 }
  67
  68 static char **files;
  69 static int nb_files, nb_libraries;
  70 static int multiple_files;
  71 static int print_search_dirs;
  72 static int output_type;
  73 static int reloc_output;
  74 static const char *outfile;
  75 static int do_bench = 0;
  76
  77 #define TCC_OPTION_HAS_ARG 0x0001
  78 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
  79
  80 typedef struct TCCOption {
  81     const char *name;
  82     uint16_t index;
  83     uint16_t flags;
  84 } TCCOption;
  85
  86 enum {
  87     TCC_OPTION_HELP,
  88     TCC_OPTION_I,
  89     TCC_OPTION_D,
  90     TCC_OPTION_U,
  91     TCC_OPTION_L,
  92     TCC_OPTION_B,
  93     TCC_OPTION_l,
  94     TCC_OPTION_bench,
  95     TCC_OPTION_bt,
  96     TCC_OPTION_b,
  97     TCC_OPTION_g,
  98     TCC_OPTION_c,
  99     TCC_OPTION_static,
 100     TCC_OPTION_shared,
 101     TCC_OPTION_soname,
 102     TCC_OPTION_o,
 103     TCC_OPTION_r,
 104     TCC_OPTION_Wl,
 105     TCC_OPTION_W,
 106     TCC_OPTION_O,
 107     TCC_OPTION_m,
 108     TCC_OPTION_f,
 109     TCC_OPTION_nostdinc,
 110     TCC_OPTION_nostdlib,
 111     TCC_OPTION_print_search_dirs,
 112     TCC_OPTION_rdynamic,
 113     TCC_OPTION_run,
 114     TCC_OPTION_v,
 115     TCC_OPTION_w,
 116     TCC_OPTION_pipe,
 117     TCC_OPTION_E,
 118     TCC_OPTION_x,
 119 };
 120
 121 static const TCCOption tcc_options[] = {
 122     { "h", TCC_OPTION_HELP, 0 },
 123     { "?", TCC_OPTION_HELP, 0 },
 124     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
 125     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
 126     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
 127     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
 128     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
 129     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 130     { "bench", TCC_OPTION_bench, 0 },
 131     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
 132 #ifdef CONFIG_TCC_BCHECK
 133     { "b", TCC_OPTION_b, 0 },
 134 #endif
 135     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 136     { "c", TCC_OPTION_c, 0 },
 137     { "static", TCC_OPTION_static, 0 },
 138     { "shared", TCC_OPTION_shared, 0 },
 139     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
 140     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
 141     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 142     { "rdynamic", TCC_OPTION_rdynamic, 0 },
 143     { "r", TCC_OPTION_r, 0 },
 144     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 145     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 146     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 147     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
 148     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 149     { "nostdinc", TCC_OPTION_nostdinc, 0 },
 150     { "nostdlib", TCC_OPTION_nostdlib, 0 },
 151     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
 152     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 153     { "w", TCC_OPTION_w, 0 },
 154     { "pipe", TCC_OPTION_pipe, 0},
 155     { "E", TCC_OPTION_E, 0},
 156     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
 157     { NULL },
 158 };
 159
 160 static int64_t getclock_us(void)
 161 {
 162 #ifdef _WIN32
 163     struct _timeb tb;
 164     _ftime(&tb);
 165     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 166 #else
 167     struct timeval tv;
 168     gettimeofday(&tv, NULL);
 169     return tv.tv_sec * 1000000LL + tv.tv_usec;
 170 #endif
 171 }
 172
 173 static int strstart(const char *str, const char *val, const char **ptr)
 174 {
 175     const char *p, *q;
 176     p = str;
 177     q = val;
 178     while (*q != '\0') {
 179         if (*p != *q)
 180             return 0;
 181         p++;
 182         q++;
 183     }
 184     if (ptr)
 185         *ptr = p;
 186     return 1;
 187 }
 188
 189 /* convert 'str' into an array of space separated strings */
 190 static int expand_args(char ***pargv, const char *str)
 191 {
 192     const char *s1;
 193     char **argv, *arg;
 194     int argc, len;
 195
 196     argc = 0;
 197     argv = NULL;
 198     for(;;) {
 199         while (is_space(*str))
 200             str++;
 201         if (*str == '\0')
 202             break;
 203         s1 = str;
 204         while (*str != '\0' && !is_space(*str))
 205             str++;
 206         len = str - s1;
 207         arg = tcc_malloc(len + 1);
 208         memcpy(arg, s1, len);
 209         arg[len] = '\0';
 210         dynarray_add((void ***)&argv, &argc, arg);
 211     }
 212     *pargv = argv;
 213     return argc;
 214 }
 215
 216 int parse_args(TCCState *s, int argc, char **argv)
 217 {
 218     int optind;
 219     const TCCOption *popt;
 220     const char *optarg, *p1, *r1;
 221     char *r;
 222
 223     optind = 0;
 224     while (optind < argc) {
 225
 226         r = argv[optind++];
 227         if (r[0] != '-' || r[1] == '\0') {
 228             /* add a new file */
 229             dynarray_add((void ***)&files, &nb_files, r);
 230             if (!multiple_files) {
 231                 optind--;
 232                 /* argv[0] will be this file */
 233                 break;
 234             }
 235         } else {
 236             /* find option in table (match only the first chars */
 237             popt = tcc_options;
 238             for(;;) {
 239                 p1 = popt->name;
 240                 if (p1 == NULL)
 241                     error("invalid option -- '%s'", r);
 242                 r1 = r + 1;
 243                 for(;;) {
 244                     if (*p1 == '\0')
 245                         goto option_found;
 246                     if (*r1 != *p1)
 247                         break;
 248                     p1++;
 249                     r1++;
 250                 }
 251                 popt++;
 252             }
 253         option_found:
 254             if (popt->flags & TCC_OPTION_HAS_ARG) {
 255                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 256                     optarg = r1;
 257                 } else {
 258                     if (optind >= argc)
 259                         error("argument to '%s' is missing", r);
 260                     optarg = argv[optind++];
 261                 }
 262             } else {
 263                 if (*r1 != '\0')
 264                     return 0;
 265                 optarg = NULL;
 266             }
 267
 268             switch(popt->index) {
 269             case TCC_OPTION_HELP:
 270                 return 0;
 271
 272             case TCC_OPTION_I:
 273                 if (tcc_add_include_path(s, optarg) < 0)
 274                     error("too many include paths");
 275                 break;
 276             case TCC_OPTION_D:
 277                 {
 278                     char *sym, *value;
 279                     sym = (char *)optarg;
 280                     value = strchr(sym, '=');
 281                     if (value) {
 282                         *value = '\0';
 283                         value++;
 284                     }
 285                     tcc_define_symbol(s, sym, value);
 286                 }
 287                 break;
 288             case TCC_OPTION_U:
 289                 tcc_undefine_symbol(s, optarg);
 290                 break;
 291             case TCC_OPTION_L:
 292                 tcc_add_library_path(s, optarg);
 293                 break;
 294             case TCC_OPTION_B:
 295                 /* set tcc utilities path (mainly for tcc development) */
 296                 tcc_set_lib_path(s, optarg);
 297                 break;
 298             case TCC_OPTION_l:
 299                 dynarray_add((void ***)&files, &nb_files, r);
 300                 nb_libraries++;
 301                 break;
 302             case TCC_OPTION_bench:
 303                 do_bench = 1;
 304                 break;
 305 #ifdef CONFIG_TCC_BACKTRACE
 306             case TCC_OPTION_bt:
 307                 num_callers = atoi(optarg);
 308                 break;
 309 #endif
 310 #ifdef CONFIG_TCC_BCHECK
 311             case TCC_OPTION_b:
 312                 s->do_bounds_check = 1;
 313                 s->do_debug = 1;
 314                 break;
 315 #endif
 316             case TCC_OPTION_g:
 317                 s->do_debug = 1;
 318                 break;
 319             case TCC_OPTION_c:
 320                 multiple_files = 1;
 321                 output_type = TCC_OUTPUT_OBJ;
 322                 break;
 323             case TCC_OPTION_static:
 324                 s->static_link = 1;
 325                 break;
 326             case TCC_OPTION_shared:
 327                 output_type = TCC_OUTPUT_DLL;
 328                 break;
 329             case TCC_OPTION_soname:
 330                 s->soname = optarg;
 331                 break;
 332             case TCC_OPTION_o:
 333                 multiple_files = 1;
 334                 outfile = optarg;
 335                 break;
 336             case TCC_OPTION_r:
 337                 /* generate a .o merging several output files */
 338                 reloc_output = 1;
 339                 output_type = TCC_OUTPUT_OBJ;
 340                 break;
 341             case TCC_OPTION_nostdinc:
 342                 s->nostdinc = 1;
 343                 break;
 344             case TCC_OPTION_nostdlib:
 345                 s->nostdlib = 1;
 346                 break;
 347             case TCC_OPTION_print_search_dirs:
 348                 print_search_dirs = 1;
 349                 break;
 350             case TCC_OPTION_run:
 351                 {
 352                     int argc1;
 353                     char **argv1;
 354                     argc1 = expand_args(&argv1, optarg);
 355                     if (argc1 > 0) {
 356                         parse_args(s, argc1, argv1);
 357                     }
 358                     multiple_files = 0;
 359                     output_type = TCC_OUTPUT_MEMORY;
 360                 }
 361                 break;
 362             case TCC_OPTION_v:
 363                 do {
 364                     if (0 == s->verbose++)
 365                         printf("tcc version %s\n", TCC_VERSION);
 366                 } while (*optarg++ == 'v');
 367                 break;
 368             case TCC_OPTION_f:
 369                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 370                     goto unsupported_option;
 371                 break;
 372             case TCC_OPTION_W:
 373                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 374                     s->warn_unsupported)
 375                     goto unsupported_option;
 376                 break;
 377             case TCC_OPTION_w:
 378                 s->warn_none = 1;
 379                 break;
 380             case TCC_OPTION_rdynamic:
 381                 s->rdynamic = 1;
 382                 break;
 383             case TCC_OPTION_Wl:
 384                 {
 385                     const char *p;
 386                     if (strstart(optarg, "-Ttext,", &p)) {
 387                         s->text_addr = strtoul(p, NULL, 16);
 388                         s->has_text_addr = 1;
 389                     } else if (strstart(optarg, "--oformat,", &p)) {
 390                         if (strstart(p, "elf32-", NULL)) {
 391                             s->output_format = TCC_OUTPUT_FORMAT_ELF;
 392                         } else if (!strcmp(p, "binary")) {
 393                             s->output_format = TCC_OUTPUT_FORMAT_BINARY;
 394                         } else
 395 #ifdef TCC_TARGET_COFF
 396                         if (!strcmp(p, "coff")) {
 397                             s->output_format = TCC_OUTPUT_FORMAT_COFF;
 398                         } else
 399 #endif
 400                         {
 401                             error("target %s not found", p);
 402                         }
 403                     } else {
 404                         error("unsupported linker option '%s'", optarg);
 405                     }
 406                 }
 407                 break;
 408             case TCC_OPTION_E:
 409                 output_type = TCC_OUTPUT_PREPROCESS;
 410                 break;
 411             case TCC_OPTION_x:
 412                 break;
 413             default:
 414                 if (s->warn_unsupported) {
 415                 unsupported_option:
 416                     warning("unsupported option '%s'", r);
 417                 }
 418                 break;
 419             }
 420         }
 421     }
 422     return optind + 1;
 423 }
 424
 425 int main(int argc, char **argv)
 426 {
 427     int i;
 428     TCCState *s;
 429     int nb_objfiles, ret, optind;
 430     char objfilename[1024];
 431     int64_t start_time = 0;
 432
 433     s = tcc_new();
 434
 435     output_type = TCC_OUTPUT_EXE;
 436     outfile = NULL;
 437     multiple_files = 1;
 438     files = NULL;
 439     nb_files = 0;
 440     nb_libraries = 0;
 441     reloc_output = 0;
 442     print_search_dirs = 0;
 443     ret = 0;
 444
 445     optind = parse_args(s, argc - 1, argv + 1);
 446     if (print_search_dirs) {
 447         /* enough for Linux kernel */
 448         printf("install: %s/\n", s->tcc_lib_path);
 449         return 0;
 450     }
 451     if (optind == 0 || nb_files == 0) {
 452         if (optind && s->verbose)
 453             return 0;
 454         help();
 455         return 1;
 456     }
 457
 458     nb_objfiles = nb_files - nb_libraries;
 459
 460     /* if outfile provided without other options, we output an
 461        executable */
 462     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 463         output_type = TCC_OUTPUT_EXE;
 464
 465     /* check -c consistency : only single file handled. XXX: checks file type */
 466     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 467         /* accepts only a single input file */
 468         if (nb_objfiles != 1)
 469             error("cannot specify multiple files with -c");
 470         if (nb_libraries != 0)
 471             error("cannot specify libraries with -c");
 472     }
 473
 474
 475     if (output_type == TCC_OUTPUT_PREPROCESS) {
 476         if (!outfile) {
 477             s->outfile = stdout;
 478         } else {
 479             s->outfile = fopen(outfile, "w");
 480             if (!s->outfile)
 481                 error("could not open '%s", outfile);
 482         }
 483     } else if (output_type != TCC_OUTPUT_MEMORY) {
 484         if (!outfile) {
 485             /* compute default outfile name */
 486             char *ext;
 487             const char *name =
 488                 strcmp(files[0], "-") == 0 ? "a" : tcc_basename(files[0]);
 489             pstrcpy(objfilename, sizeof(objfilename), name);
 490             ext = tcc_fileextension(objfilename);
 491 #ifdef TCC_TARGET_PE
 492             if (output_type == TCC_OUTPUT_DLL)
 493                 strcpy(ext, ".dll");
 494             else
 495             if (output_type == TCC_OUTPUT_EXE)
 496                 strcpy(ext, ".exe");
 497             else
 498 #endif
 499             if (output_type == TCC_OUTPUT_OBJ && !reloc_output && *ext)
 500                 strcpy(ext, ".o");
 501             else
 502                 pstrcpy(objfilename, sizeof(objfilename), "a.out");
 503             outfile = objfilename;
 504         }
 505     }
 506
 507     if (do_bench) {
 508         start_time = getclock_us();
 509     }
 510
 511     tcc_set_output_type(s, output_type);
 512
 513     /* compile or add each files or library */
 514     for(i = 0; i < nb_files && ret == 0; i++) {
 515         const char *filename;
 516
 517         filename = files[i];
 518         if (filename[0] == '-' && filename[1]) {
 519             if (tcc_add_library(s, filename + 2) < 0) {
 520                 error_noabort("cannot find %s", filename);
 521                 ret = 1;
 522             }
 523         } else {
 524             if (1 == s->verbose)
 525                 printf("-> %s\n", filename);
 526             if (tcc_add_file(s, filename) < 0)
 527                 ret = 1;
 528         }
 529     }
 530
 531     /* free all files */
 532     tcc_free(files);
 533
 534     if (0 == ret) {
 535         if (do_bench)
 536             tcc_print_stats(s, getclock_us() - start_time);
 537
 538         if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 539             if (outfile)
 540                 fclose(s->outfile);
 541         } else if (s->output_type == TCC_OUTPUT_MEMORY)
 542             ret = tcc_run(s, argc - optind, argv + optind);
 543         else
 544             ret = tcc_output_file(s, outfile) ? 1 : 0;
 545     }
 546
 547     tcc_delete(s);
 548
 549 #ifdef MEM_DEBUG
 550     if (do_bench) {
 551         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 552     }
 553 #endif
 554     return ret;
 555 }