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_pedantic,
 119     TCC_OPTION_pthread,
 120     TCC_OPTION_run,
 121     TCC_OPTION_v,
 122     TCC_OPTION_w,
 123     TCC_OPTION_pipe,
 124     TCC_OPTION_E,
 125     TCC_OPTION_MD,
 126     TCC_OPTION_MF,
 127     TCC_OPTION_x,
 128 };
 129
 130 static const TCCOption tcc_options[] = {
 131     { "h", TCC_OPTION_HELP, 0 },
 132     { "-help", TCC_OPTION_HELP, 0 },
 133     { "?", TCC_OPTION_HELP, 0 },
 134     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
 135     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
 136     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
 137     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
 138     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
 139     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 140     { "bench", TCC_OPTION_bench, 0 },
 141 #ifdef CONFIG_TCC_BACKTRACE
 142     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
 143 #endif
 144 #ifdef CONFIG_TCC_BCHECK
 145     { "b", TCC_OPTION_b, 0 },
 146 #endif
 147     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 148     { "c", TCC_OPTION_c, 0 },
 149     { "static", TCC_OPTION_static, 0 },
 150     { "shared", TCC_OPTION_shared, 0 },
 151     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
 152     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
 153     { "pedantic", TCC_OPTION_pedantic, 0},
 154     { "pthread", TCC_OPTION_pthread, 0},
 155     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 156     { "rdynamic", TCC_OPTION_rdynamic, 0 },
 157     { "r", TCC_OPTION_r, 0 },
 158     { "s", TCC_OPTION_s, 0 },
 159     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 160     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 161     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 162     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
 163     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 164     { "nostdinc", TCC_OPTION_nostdinc, 0 },
 165     { "nostdlib", TCC_OPTION_nostdlib, 0 },
 166     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
 167     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 168     { "w", TCC_OPTION_w, 0 },
 169     { "pipe", TCC_OPTION_pipe, 0},
 170     { "E", TCC_OPTION_E, 0},
 171     { "MD", TCC_OPTION_MD, 0},
 172     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
 173     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
 174     { NULL },
 175 };
 176
 177 static int64_t getclock_us(void)
 178 {
 179 #ifdef _WIN32
 180     struct _timeb tb;
 181     _ftime(&tb);
 182     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 183 #else
 184     struct timeval tv;
 185     gettimeofday(&tv, NULL);
 186     return tv.tv_sec * 1000000LL + tv.tv_usec;
 187 #endif
 188 }
 189
 190 /* convert 'str' into an array of space separated strings */
 191 static int expand_args(char ***pargv, const char *str)
 192 {
 193     const char *s1;
 194     char **argv, *arg;
 195     int argc, len;
 196
 197     argc = 0;
 198     argv = NULL;
 199     for(;;) {
 200         while (is_space(*str))
 201             str++;
 202         if (*str == '\0')
 203             break;
 204         s1 = str;
 205         while (*str != '\0' && !is_space(*str))
 206             str++;
 207         len = str - s1;
 208         arg = tcc_malloc(len + 1);
 209         memcpy(arg, s1, len);
 210         arg[len] = '\0';
 211         dynarray_add((void ***)&argv, &argc, arg);
 212     }
 213     *pargv = argv;
 214     return argc;
 215 }
 216
 217 #if defined(TCC_TARGET_X86_64) || defined (TCC_TARGET_I386)
 218
 219 #ifdef _WIN32
 220 #define CAST (const char * const *)
 221 #else
 222 #define CAST (char * const *)
 223 #endif
 224
 225 #if defined(TCC_TARGET_X86_64)
 226 #define ARG 32
 227 #define CHILD "i386"
 228 #elif defined (TCC_TARGET_I386)
 229 #define ARG 64
 230 #define CHILD "x86_64"
 231 #endif
 232
 233 static char *ssuffix(const char *oldname, const char sep)
 234 {
 235     char *p, *name = tcc_strdup(oldname);
 236     p = strchr(name, sep);
 237     if (p)
 238         return p + 1;
 239     /* prefix "win32-" when file extension is present */
 240     if (*tcc_fileextension(name)){
 241         name = tcc_realloc(name, strlen(oldname + 7));
 242         sprintf(name, "win32-%s", oldname);
 243     }
 244     return name;
 245 }
 246
 247 static void exec_other_tcc(TCCState *s, int argc,
 248     char **argv,const char *optarg, int optind)
 249 {
 250     char child_path[4096],child_name[4096];
 251     char *parent,*child_tcc;
 252     int opt = atoi(optarg);
 253     if (strlen(argv[0]) > 4000)
 254         error("-m%i unsafe path length", ARG);
 255     switch (opt) {
 256         case ARG + 1: /* oops we called ourselves */
 257             error("-m%i cross compiler not installed", ARG);
 258             break;
 259         case ARG:
 260         {
 261             parent = tcc_basename(argv[0]);
 262             child_tcc = ssuffix(parent,'-');
 263             sprintf(child_name, CHILD "-%s", child_tcc);
 264             tcc_free(child_tcc);
 265             if (strcmp(parent, child_name)) {
 266                 /* child_path = dirname */
 267                 pstrcpy(child_path, parent - argv[0] + 1, argv[0]);
 268                 child_tcc = strchr(child_path, 0);
 269                 strcpy(child_tcc, child_name);
 270                 if (0 < s->verbose)
 271                     printf("%s -m%i -> %s\n",
 272                          parent, ARG, child_path);
 273                 sprintf(argv[optind],"-m%i", ARG + 1); /* no loop */
 274                 execvp(child_path, CAST argv);
 275                 sprintf(child_tcc,"tcc%s",tcc_fileextension(parent));
 276                 execvp(child_path, CAST argv);
 277                 error("-m%i cross compiler not found", ARG);
 278             } else error("-m%i unsupported configuration", ARG);
 279         }
 280         case 96 ^  ARG     : break;
 281         case 96 ^ (ARG + 1): break;
 282         default:
 283             warning("usupported option \"-m%s\"",optarg);
 284     }
 285 }
 286 #undef CAST
 287 #undef ARG
 288 #undef CHILD
 289 #endif
 290
 291 static int parse_args(TCCState *s, int argc, char **argv)
 292 {
 293     int optind;
 294     const TCCOption *popt;
 295     const char *optarg, *p1, *r1;
 296     char *r;
 297     int was_pthread;
 298
 299     was_pthread = 0; /* is set if commandline contains -pthread key */
 300
 301     optind = 0;
 302     while (optind < argc) {
 303
 304         r = argv[optind++];
 305         if (r[0] != '-' || r[1] == '\0') {
 306             /* add a new file */
 307             dynarray_add((void ***)&files, &nb_files, r);
 308             if (!multiple_files) {
 309                 optind--;
 310                 /* argv[0] will be this file */
 311                 break;
 312             }
 313         } else {
 314             /* find option in table (match only the first chars */
 315             popt = tcc_options;
 316             for(;;) {
 317                 p1 = popt->name;
 318                 if (p1 == NULL)
 319                     error("invalid option -- '%s'", r);
 320                 r1 = r + 1;
 321                 for(;;) {
 322                     if (*p1 == '\0')
 323                         goto option_found;
 324                     if (*r1 != *p1)
 325                         break;
 326                     p1++;
 327                     r1++;
 328                 }
 329                 popt++;
 330             }
 331         option_found:
 332             if (popt->flags & TCC_OPTION_HAS_ARG) {
 333                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 334                     optarg = r1;
 335                 } else {
 336                     if (optind >= argc)
 337                         error("argument to '%s' is missing", r);
 338                     optarg = argv[optind++];
 339                 }
 340             } else {
 341                 if (*r1 != '\0')
 342                     return 0;
 343                 optarg = NULL;
 344             }
 345
 346             switch(popt->index) {
 347             case TCC_OPTION_HELP:
 348                 return 0;
 349
 350             case TCC_OPTION_I:
 351                 if (tcc_add_include_path(s, optarg) < 0)
 352                     error("too many include paths");
 353                 break;
 354             case TCC_OPTION_D:
 355                 {
 356                     char *sym, *value;
 357                     sym = (char *)optarg;
 358                     value = strchr(sym, '=');
 359                     if (value) {
 360                         *value = '\0';
 361                         value++;
 362                     }
 363                     tcc_define_symbol(s, sym, value);
 364                 }
 365                 break;
 366             case TCC_OPTION_U:
 367                 tcc_undefine_symbol(s, optarg);
 368                 break;
 369             case TCC_OPTION_L:
 370                 tcc_add_library_path(s, optarg);
 371                 break;
 372             case TCC_OPTION_B:
 373                 /* set tcc utilities path (mainly for tcc development) */
 374                 tcc_set_lib_path(s, optarg);
 375                 break;
 376             case TCC_OPTION_l:
 377                 dynarray_add((void ***)&files, &nb_files, r);
 378                 nb_libraries++;
 379                 break;
 380             case TCC_OPTION_pthread:
 381                 was_pthread = 1;
 382                 tcc_define_symbol(s, "_REENTRANT", "1");
 383                 break;
 384             case TCC_OPTION_bench:
 385                 do_bench = 1;
 386                 break;
 387 #ifdef CONFIG_TCC_BACKTRACE
 388             case TCC_OPTION_bt:
 389                 set_num_callers(atoi(optarg));
 390                 break;
 391 #endif
 392 #ifdef CONFIG_TCC_BCHECK
 393             case TCC_OPTION_b:
 394                 s->do_bounds_check = 1;
 395                 s->do_debug = 1;
 396                 break;
 397 #endif
 398             case TCC_OPTION_g:
 399                 s->do_debug = 1;
 400                 break;
 401             case TCC_OPTION_c:
 402                 multiple_files = 1;
 403                 output_type = TCC_OUTPUT_OBJ;
 404                 break;
 405             case TCC_OPTION_static:
 406                 s->static_link = 1;
 407                 break;
 408             case TCC_OPTION_shared:
 409                 output_type = TCC_OUTPUT_DLL;
 410                 break;
 411             case TCC_OPTION_soname:
 412                 s->soname = optarg;
 413                 break;
 414 #if defined(TCC_TARGET_X86_64) || defined (TCC_TARGET_I386)
 415             case TCC_OPTION_m:
 416                     exec_other_tcc(s, argc+1, argv-1, optarg, optind);
 417                 break;
 418 #endif
 419             case TCC_OPTION_o:
 420                 multiple_files = 1;
 421                 outfile = optarg;
 422                 break;
 423             case TCC_OPTION_r:
 424                 /* generate a .o merging several output files */
 425                 reloc_output = 1;
 426                 output_type = TCC_OUTPUT_OBJ;
 427                 break;
 428             case TCC_OPTION_nostdinc:
 429                 s->nostdinc = 1;
 430                 break;
 431             case TCC_OPTION_nostdlib:
 432                 s->nostdlib = 1;
 433                 break;
 434             case TCC_OPTION_print_search_dirs:
 435                 print_search_dirs = 1;
 436                 break;
 437             case TCC_OPTION_run:
 438                 {
 439                     int argc1;
 440                     char **argv1;
 441                     argc1 = expand_args(&argv1, optarg);
 442                     if (argc1 > 0) {
 443                         parse_args(s, argc1, argv1);
 444                     }
 445                     multiple_files = 0;
 446                     output_type = TCC_OUTPUT_MEMORY;
 447                 }
 448                 break;
 449             case TCC_OPTION_v:
 450                 do {
 451                     if (0 == s->verbose++)
 452                         printf("tcc version %s\n", TCC_VERSION);
 453                 } while (*optarg++ == 'v');
 454                 break;
 455             case TCC_OPTION_f:
 456                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 457                     goto unsupported_option;
 458                 break;
 459             case TCC_OPTION_W:
 460                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 461                     s->warn_unsupported)
 462                     goto unsupported_option;
 463                 break;
 464             case TCC_OPTION_w:
 465                 s->warn_none = 1;
 466                 break;
 467             case TCC_OPTION_rdynamic:
 468                 s->rdynamic = 1;
 469                 break;
 470             case TCC_OPTION_Wl:
 471                 {
 472                     if ((r = (char *) tcc_set_linker(s, (char *)optarg, TRUE)))
 473                         error("unsupported linker option '%s'", r);
 474                 }
 475                 break;
 476             case TCC_OPTION_E:
 477                 output_type = TCC_OUTPUT_PREPROCESS;
 478                 break;
 479             case TCC_OPTION_MD:
 480                 gen_deps = 1;
 481                 break;
 482             case TCC_OPTION_MF:
 483                 deps_outfile = optarg;
 484                 break;
 485             case TCC_OPTION_x:
 486                 break;
 487             default:
 488                 if (s->warn_unsupported) {
 489                 unsupported_option:
 490                     warning("unsupported option '%s'", r);
 491                 }
 492                 break;
 493             }
 494         }
 495     }
 496     /* fixme: these options could be different on your platform */
 497     if (was_pthread
 498         && output_type != TCC_OUTPUT_OBJ)
 499     {
 500         dynarray_add((void ***)&files, &nb_files, "-lpthread");
 501         nb_libraries++;
 502     }
 503     return optind + 1;
 504 }
 505
 506 int main(int argc, char **argv)
 507 {
 508     int i;
 509     TCCState *s;
 510     int nb_objfiles, ret, optind;
 511     int64_t start_time = 0;
 512
 513     s = tcc_new();
 514
 515     output_type = TCC_OUTPUT_EXE;
 516     outfile = NULL;
 517     multiple_files = 1;
 518     files = NULL;
 519     nb_files = 0;
 520     nb_libraries = 0;
 521     reloc_output = 0;
 522     print_search_dirs = 0;
 523     ret = 0;
 524
 525     optind = parse_args(s, argc - 1, argv + 1);
 526     if (print_search_dirs) {
 527         /* enough for Linux kernel */
 528         printf("install: %s/\n", s->tcc_lib_path);
 529         return 0;
 530     }
 531     if (optind == 0 || nb_files == 0) {
 532         if (optind && s->verbose)
 533             return 0;
 534         help();
 535         return 1;
 536     }
 537
 538     nb_objfiles = nb_files - nb_libraries;
 539
 540     /* if outfile provided without other options, we output an
 541        executable */
 542     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 543         output_type = TCC_OUTPUT_EXE;
 544
 545     /* check -c consistency : only single file handled. XXX: checks file type */
 546     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 547         /* accepts only a single input file */
 548         if (nb_objfiles != 1)
 549             error("cannot specify multiple files with -c");
 550         if (nb_libraries != 0)
 551             error("cannot specify libraries with -c");
 552     }
 553
 554
 555     if (output_type == TCC_OUTPUT_PREPROCESS) {
 556         if (!outfile) {
 557             s->outfile = stdout;
 558         } else {
 559             s->outfile = fopen(outfile, "w");
 560             if (!s->outfile)
 561                 error("could not open '%s'", outfile);
 562         }
 563     }
 564
 565     if (do_bench) {
 566         start_time = getclock_us();
 567     }
 568
 569     tcc_set_output_type(s, output_type);
 570     s->reloc_output = reloc_output;
 571
 572     /* compile or add each files or library */
 573     for(i = 0; i < nb_files && ret == 0; i++) {
 574         const char *filename;
 575
 576         filename = files[i];
 577         if (filename[0] == '-' && filename[1] == 'l') {
 578             if (tcc_add_library(s, filename + 2) < 0) {
 579                 error_noabort("cannot find %s", filename);
 580                 ret = 1;
 581             }
 582         } else {
 583             if (1 == s->verbose)
 584                 printf("-> %s\n", filename);
 585             if (tcc_add_file(s, filename) < 0)
 586                 ret = 1;
 587         }
 588     }
 589
 590     /* free all files */
 591     tcc_free(files);
 592
 593     if (0 == ret) {
 594         if (do_bench)
 595             tcc_print_stats(s, getclock_us() - start_time);
 596
 597         if (s->output_type == TCC_OUTPUT_MEMORY)
 598             ret = tcc_run(s, argc - optind, argv + optind);
 599         else {
 600             if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 601                 if (outfile)
 602                     fclose(s->outfile);
 603             } else {
 604                 ret = tcc_output_file(s, outfile ? outfile : tcc_default_target(s));
 605                 ret = ret ? 1 : 0;
 606             }
 607
 608             /* dump collected dependencies */
 609             if (gen_deps && !ret)
 610                 tcc_gen_makedeps(s, outfile, deps_outfile);
 611         }
 612     }
 613
 614     tcc_delete(s);
 615
 616 #ifdef MEM_DEBUG
 617     if (do_bench) {
 618         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 619     }
 620 #endif
 621     return ret;
 622 }