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 ONE_SOURCE
  22 #include "libtcc.c"
  23 #else
  24 #include "tcc.h"
  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 char *outfile;
  34 static int do_bench = 0;
  35 static int gen_deps;
  36 static const char *deps_outfile;
  37 static const char *m_option;
  38 static CString linker_arg;
  39
  40 #define TCC_OPTION_HAS_ARG 0x0001
  41 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
  42
  43 static void help(void)
  44 {
  45     printf("tcc version " TCC_VERSION " - Tiny C Compiler - Copyright (C) 2001-2006 Fabrice Bellard\n"
  46            "Usage: tcc [options...] [-o outfile] [-c] infile(s)...\n"
  47            "       tcc [options...] -run infile [arguments...]\n"
  48            "General options:\n"
  49            "  -v          display current version, increase verbosity\n"
  50            "  -c          compile only - generate an object file\n"
  51            "  -o outfile  set output filename\n"
  52            "  -Bdir       set tcc internal library and include path\n"
  53            "  -bench      output compilation statistics\n"
  54            "  -run        run compiled source\n"
  55            "  -fflag      set or reset (with 'no-' prefix) 'flag' (see man page)\n"
  56            "  -Wwarning   set or reset (with 'no-' prefix) 'warning' (see man page)\n"
  57            "  -w          disable all warnings\n"
  58            "Preprocessor options:\n"
  59            "  -E          preprocess only\n"
  60            "  -Idir       add include path 'dir'\n"
  61            "  -Dsym[=val] define 'sym' with value 'val'\n"
  62            "  -Usym       undefine 'sym'\n"
  63            "Linker options:\n"
  64            "  -Ldir       add library path 'dir'\n"
  65            "  -llib       link with dynamic or static library 'lib'\n"
  66            "  -pthread    link with -lpthread and -D_REENTRANT (POSIX Linux)\n"
  67            "  -shared     generate a shared library\n"
  68            "  -soname     set name for shared library to be used at runtime\n"
  69            "  -static     static linking\n"
  70            "  -rdynamic   export all global symbols to dynamic linker\n"
  71            "  -r          generate (relocatable) object file\n"
  72            "Debugger options:\n"
  73            "  -g          generate runtime debug info\n"
  74 #ifdef CONFIG_TCC_BCHECK
  75            "  -b          compile with built-in memory and bounds checker (implies -g)\n"
  76 #endif
  77 #ifdef CONFIG_TCC_BACKTRACE
  78            "  -bt N       show N callers in stack traces\n"
  79 #endif
  80            "Misc options:\n"
  81            "  -MD         generate target dependencies for make\n"
  82            "  -MF depfile put generated dependencies here\n"
  83            );
  84 }
  85
  86 typedef struct TCCOption {
  87     const char *name;
  88     uint16_t index;
  89     uint16_t flags;
  90 } TCCOption;
  91
  92 enum {
  93     TCC_OPTION_HELP,
  94     TCC_OPTION_I,
  95     TCC_OPTION_D,
  96     TCC_OPTION_U,
  97     TCC_OPTION_L,
  98     TCC_OPTION_B,
  99     TCC_OPTION_l,
 100     TCC_OPTION_bench,
 101     TCC_OPTION_bt,
 102     TCC_OPTION_b,
 103     TCC_OPTION_g,
 104     TCC_OPTION_c,
 105     TCC_OPTION_static,
 106     TCC_OPTION_shared,
 107     TCC_OPTION_soname,
 108     TCC_OPTION_o,
 109     TCC_OPTION_r,
 110     TCC_OPTION_s,
 111     TCC_OPTION_Wl,
 112     TCC_OPTION_W,
 113     TCC_OPTION_O,
 114     TCC_OPTION_m,
 115     TCC_OPTION_f,
 116     TCC_OPTION_isystem,
 117     TCC_OPTION_nostdinc,
 118     TCC_OPTION_nostdlib,
 119     TCC_OPTION_print_search_dirs,
 120     TCC_OPTION_rdynamic,
 121     TCC_OPTION_pedantic,
 122     TCC_OPTION_pthread,
 123     TCC_OPTION_run,
 124     TCC_OPTION_v,
 125     TCC_OPTION_w,
 126     TCC_OPTION_pipe,
 127     TCC_OPTION_E,
 128     TCC_OPTION_MD,
 129     TCC_OPTION_MF,
 130     TCC_OPTION_x,
 131 };
 132
 133 static const TCCOption tcc_options[] = {
 134     { "h", TCC_OPTION_HELP, 0 },
 135     { "-help", TCC_OPTION_HELP, 0 },
 136     { "?", TCC_OPTION_HELP, 0 },
 137     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
 138     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
 139     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
 140     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
 141     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
 142     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 143     { "bench", TCC_OPTION_bench, 0 },
 144 #ifdef CONFIG_TCC_BACKTRACE
 145     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
 146 #endif
 147 #ifdef CONFIG_TCC_BCHECK
 148     { "b", TCC_OPTION_b, 0 },
 149 #endif
 150     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 151     { "c", TCC_OPTION_c, 0 },
 152     { "static", TCC_OPTION_static, 0 },
 153     { "shared", TCC_OPTION_shared, 0 },
 154     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
 155     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
 156     { "pedantic", TCC_OPTION_pedantic, 0},
 157     { "pthread", TCC_OPTION_pthread, 0},
 158     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 159     { "rdynamic", TCC_OPTION_rdynamic, 0 },
 160     { "r", TCC_OPTION_r, 0 },
 161     { "s", TCC_OPTION_s, 0 },
 162     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 163     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 164     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 165     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
 166     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 167     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
 168     { "nostdinc", TCC_OPTION_nostdinc, 0 },
 169     { "nostdlib", TCC_OPTION_nostdlib, 0 },
 170     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
 171     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
 172     { "w", TCC_OPTION_w, 0 },
 173     { "pipe", TCC_OPTION_pipe, 0},
 174     { "E", TCC_OPTION_E, 0},
 175     { "MD", TCC_OPTION_MD, 0},
 176     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
 177     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
 178     { NULL },
 179 };
 180
 181 static int64_t getclock_us(void)
 182 {
 183 #ifdef _WIN32
 184     struct _timeb tb;
 185     _ftime(&tb);
 186     return (tb.time * 1000LL + tb.millitm) * 1000LL;
 187 #else
 188     struct timeval tv;
 189     gettimeofday(&tv, NULL);
 190     return tv.tv_sec * 1000000LL + tv.tv_usec;
 191 #endif
 192 }
 193
 194 /* convert 'str' into an array of space separated strings */
 195 static int expand_args(char ***pargv, const char *str)
 196 {
 197     const char *s1;
 198     char **argv, *arg;
 199     int argc, len;
 200
 201     argc = 0;
 202     argv = NULL;
 203     for(;;) {
 204         while (is_space(*str))
 205             str++;
 206         if (*str == '\0')
 207             break;
 208         s1 = str;
 209         while (*str != '\0' && !is_space(*str))
 210             str++;
 211         len = str - s1;
 212         arg = tcc_malloc(len + 1);
 213         memcpy(arg, s1, len);
 214         arg[len] = '\0';
 215         dynarray_add((void ***)&argv, &argc, arg);
 216     }
 217     *pargv = argv;
 218     return argc;
 219 }
 220
 221 /* re-execute the i386/x86_64 cross-compilers with tcc -m32/-m64: */
 222 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 223 #ifdef _WIN32
 224 #include <process.h>
 225 static int execvp_win32(const char *prog, char **argv)
 226 {
 227     int ret = spawnvp(P_NOWAIT, prog, (char const*const*)argv);
 228     if (-1 == ret)
 229         return ret;
 230     cwait(&ret, ret, WAIT_CHILD);
 231     exit(ret);
 232 }
 233 #define execvp execvp_win32
 234 #endif
 235 static void exec_other_tcc(TCCState *s, char **argv, const char *optarg)
 236 {
 237     char child_path[4096], *child_name; const char *target;
 238     switch (atoi(optarg)) {
 239 #ifdef TCC_TARGET_I386
 240         case 32: break;
 241         case 64: target = "x86_64";
 242 #else
 243         case 64: break;
 244         case 32: target = "i386";
 245 #endif
 246             pstrcpy(child_path, sizeof child_path - 40, argv[0]);
 247             child_name = tcc_basename(child_path);
 248             strcpy(child_name, target);
 249 #ifdef TCC_TARGET_PE
 250             strcat(child_name, "-win32");
 251 #endif
 252             strcat(child_name, "-tcc");
 253             if (strcmp(argv[0], child_path)) {
 254                 if (s->verbose > 0)
 255                     printf("tcc: using '%s'\n", child_name), fflush(stdout);
 256                 execvp(argv[0] = child_path, argv);
 257             }
 258             tcc_error("'%s' not found", child_name);
 259         case 0: /* ignore -march etc. */
 260             break;
 261         default:
 262             tcc_warning("unsupported option \"-m%s\"", optarg);
 263     }
 264 }
 265 #endif
 266
 267 static void parse_option_D(TCCState *s1, const char *optarg)
 268 {
 269     char *sym = tcc_strdup(optarg);
 270     char *value = strchr(sym, '=');
 271     if (value)
 272         *value++ = '\0';
 273     tcc_define_symbol(s1, sym, value);
 274     tcc_free(sym);
 275 }
 276
 277 static int parse_args(TCCState *s, int argc, char **argv)
 278 {
 279     int optind;
 280     const TCCOption *popt;
 281     const char *optarg, *p1, *r1;
 282     char *r;
 283     int was_pthread;
 284
 285     was_pthread = 0; /* is set if commandline contains -pthread key */
 286     optind = 0;
 287     cstr_new(&linker_arg);
 288
 289     while (optind < argc) {
 290
 291         r = argv[optind++];
 292         if (r[0] != '-' || r[1] == '\0') {
 293             /* add a new file */
 294             dynarray_add((void ***)&files, &nb_files, r);
 295             if (!multiple_files) {
 296                 optind--;
 297                 /* argv[0] will be this file */
 298                 break;
 299             }
 300         } else {
 301             /* find option in table (match only the first chars */
 302             popt = tcc_options;
 303             for(;;) {
 304                 p1 = popt->name;
 305                 if (p1 == NULL)
 306                     tcc_error("invalid option -- '%s'", r);
 307                 r1 = r + 1;
 308                 for(;;) {
 309                     if (*p1 == '\0')
 310                         goto option_found;
 311                     if (*r1 != *p1)
 312                         break;
 313                     p1++;
 314                     r1++;
 315                 }
 316                 popt++;
 317             }
 318         option_found:
 319             if (popt->flags & TCC_OPTION_HAS_ARG) {
 320                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 321                     optarg = r1;
 322                 } else {
 323                     if (optind >= argc)
 324                         tcc_error("argument to '%s' is missing", r);
 325                     optarg = argv[optind++];
 326                 }
 327             } else {
 328                 if (*r1 != '\0')
 329                     return 0;
 330                 optarg = NULL;
 331             }
 332
 333             switch(popt->index) {
 334             case TCC_OPTION_HELP:
 335                 return 0;
 336
 337             case TCC_OPTION_I:
 338                 if (tcc_add_include_path(s, optarg) < 0)
 339                     tcc_error("too many include paths");
 340                 break;
 341             case TCC_OPTION_D:
 342                 parse_option_D(s, optarg);
 343                 break;
 344             case TCC_OPTION_U:
 345                 tcc_undefine_symbol(s, optarg);
 346                 break;
 347             case TCC_OPTION_L:
 348                 tcc_add_library_path(s, optarg);
 349                 break;
 350             case TCC_OPTION_B:
 351                 /* set tcc utilities path (mainly for tcc development) */
 352                 tcc_set_lib_path(s, optarg);
 353                 break;
 354             case TCC_OPTION_l:
 355                 dynarray_add((void ***)&files, &nb_files, r);
 356                 nb_libraries++;
 357                 break;
 358             case TCC_OPTION_pthread:
 359                 was_pthread = 1;
 360                 parse_option_D(s, "_REENTRANT");
 361                 break;
 362             case TCC_OPTION_bench:
 363                 do_bench = 1;
 364                 break;
 365 #ifdef CONFIG_TCC_BACKTRACE
 366             case TCC_OPTION_bt:
 367                 tcc_set_num_callers(atoi(optarg));
 368                 break;
 369 #endif
 370 #ifdef CONFIG_TCC_BCHECK
 371             case TCC_OPTION_b:
 372                 s->do_bounds_check = 1;
 373                 s->do_debug = 1;
 374                 break;
 375 #endif
 376             case TCC_OPTION_g:
 377                 s->do_debug = 1;
 378                 break;
 379             case TCC_OPTION_c:
 380                 multiple_files = 1;
 381                 output_type = TCC_OUTPUT_OBJ;
 382                 break;
 383             case TCC_OPTION_static:
 384                 s->static_link = 1;
 385                 break;
 386             case TCC_OPTION_shared:
 387                 output_type = TCC_OUTPUT_DLL;
 388                 break;
 389             case TCC_OPTION_soname:
 390                 s->soname = optarg;
 391                 break;
 392             case TCC_OPTION_m:
 393                 m_option = optarg;
 394                 break;
 395             case TCC_OPTION_o:
 396                 multiple_files = 1;
 397                 outfile = tcc_strdup(optarg);
 398                 break;
 399             case TCC_OPTION_r:
 400                 /* generate a .o merging several output files */
 401                 reloc_output = 1;
 402                 output_type = TCC_OUTPUT_OBJ;
 403                 break;
 404             case TCC_OPTION_isystem:
 405                 tcc_add_sysinclude_path(s, optarg);
 406                 break;
 407             case TCC_OPTION_nostdinc:
 408                 s->nostdinc = 1;
 409                 break;
 410             case TCC_OPTION_nostdlib:
 411                 s->nostdlib = 1;
 412                 break;
 413             case TCC_OPTION_print_search_dirs:
 414                 print_search_dirs = 1;
 415                 break;
 416             case TCC_OPTION_run:
 417             {
 418                 int argc1;
 419                 char **argv1;
 420                 argc1 = expand_args(&argv1, optarg);
 421                 if (argc1 > 0) {
 422                     parse_args(s, argc1, argv1);
 423                 }
 424                 multiple_files = 0;
 425                 output_type = TCC_OUTPUT_MEMORY;
 426                 break;
 427             }
 428             case TCC_OPTION_v:
 429                 do ++s->verbose; while (*optarg++ == 'v');
 430                 break;
 431             case TCC_OPTION_f:
 432                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 433                     goto unsupported_option;
 434                 break;
 435             case TCC_OPTION_W:
 436                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 437                     s->warn_unsupported)
 438                     goto unsupported_option;
 439                 break;
 440             case TCC_OPTION_w:
 441                 s->warn_none = 1;
 442                 break;
 443             case TCC_OPTION_rdynamic:
 444                 s->rdynamic = 1;
 445                 break;
 446             case TCC_OPTION_Wl:
 447                 if (linker_arg.size)
 448                     --linker_arg.size, cstr_ccat(&linker_arg, ',');
 449                 cstr_cat(&linker_arg, optarg);
 450                 cstr_ccat(&linker_arg, '\0');
 451                 break;
 452             case TCC_OPTION_E:
 453                 output_type = TCC_OUTPUT_PREPROCESS;
 454                 break;
 455             case TCC_OPTION_MD:
 456                 gen_deps = 1;
 457                 break;
 458             case TCC_OPTION_MF:
 459                 deps_outfile = optarg;
 460                 break;
 461             case TCC_OPTION_x:
 462                 break;
 463             default:
 464                 if (s->warn_unsupported) {
 465                 unsupported_option:
 466                     tcc_warning("unsupported option '%s'", r);
 467                 }
 468                 break;
 469             }
 470         }
 471     }
 472     if (NULL != (r1 = tcc_set_linker(s, (char *) linker_arg.data, TRUE)))
 473         tcc_error("unsupported linker option '%s'", r1);
 474     /* fixme: these options could be different on your platform */
 475     if (was_pthread && output_type != TCC_OUTPUT_OBJ) {
 476         dynarray_add((void ***)&files, &nb_files, "-lpthread");
 477         nb_libraries++;
 478     }
 479     return optind;
 480 }
 481
 482 int main(int argc, char **argv)
 483 {
 484     int i;
 485     TCCState *s;
 486     int nb_objfiles, ret, optind;
 487     int64_t start_time = 0;
 488     const char *default_file = NULL;
 489
 490     s = tcc_new();
 491
 492     output_type = TCC_OUTPUT_EXE;
 493     outfile = NULL;
 494     multiple_files = 1;
 495     files = NULL;
 496     nb_files = 0;
 497     nb_libraries = 0;
 498     reloc_output = 0;
 499     print_search_dirs = 0;
 500     m_option = NULL;
 501     ret = 0;
 502
 503     optind = parse_args(s, argc - 1, argv + 1);
 504
 505 #if defined TCC_TARGET_X86_64 || defined TCC_TARGET_I386
 506     if (m_option)
 507         exec_other_tcc(s, argv, m_option);
 508 #endif
 509
 510     if (print_search_dirs) {
 511         /* enough for Linux kernel */
 512         printf("install: %s/\n", s->tcc_lib_path);
 513         return 0;
 514     }
 515
 516     if (s->verbose)
 517         printf("tcc version %s\n", TCC_VERSION);
 518
 519     if (optind == 0 || nb_files == 0) {
 520         if (optind && s->verbose)
 521             return 0;
 522         help();
 523         return 1;
 524     }
 525
 526     nb_objfiles = nb_files - nb_libraries;
 527
 528     /* if outfile provided without other options, we output an
 529        executable */
 530     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 531         output_type = TCC_OUTPUT_EXE;
 532
 533     /* check -c consistency : only single file handled. XXX: checks file type */
 534     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 535         /* accepts only a single input file */
 536         if (nb_objfiles != 1)
 537             tcc_error("cannot specify multiple files with -c");
 538         if (nb_libraries != 0)
 539             tcc_error("cannot specify libraries with -c");
 540     }
 541
 542     if (output_type == TCC_OUTPUT_PREPROCESS) {
 543         if (!outfile) {
 544             s->outfile = stdout;
 545         } else {
 546             s->outfile = fopen(outfile, "w");
 547             if (!s->outfile)
 548                 tcc_error("could not open '%s'", outfile);
 549         }
 550     }
 551
 552     if (do_bench) {
 553         start_time = getclock_us();
 554     }
 555
 556     tcc_set_output_type(s, output_type);
 557     s->reloc_output = reloc_output;
 558
 559     /* compile or add each files or library */
 560     for(i = 0; i < nb_files && ret == 0; i++) {
 561         const char *filename;
 562
 563         filename = files[i];
 564         if (filename[0] == '-' && filename[1] == 'l') {
 565             if (tcc_add_library(s, filename + 2) < 0) {
 566                 tcc_error_noabort("cannot find %s", filename);
 567                 ret = 1;
 568             }
 569         } else {
 570             if (1 == s->verbose)
 571                 printf("-> %s\n", filename);
 572             if (tcc_add_file(s, filename) < 0)
 573                 ret = 1;
 574             if (!default_file)
 575                 default_file = filename;
 576         }
 577     }
 578
 579     /* free all files */
 580     tcc_free(files);
 581
 582     if (0 == ret) {
 583         if (do_bench)
 584             tcc_print_stats(s, getclock_us() - start_time);
 585
 586         if (s->output_type == TCC_OUTPUT_MEMORY) {
 587 #ifdef TCC_IS_NATIVE
 588             ret = tcc_run(s, argc - 1 - optind, argv + 1 + optind);
 589 #else
 590             tcc_error_noabort("-run is not available in a cross compiler");
 591 #endif
 592         } else if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 593              if (s->outfile)
 594                 fclose(s->outfile);
 595         } else {
 596             if (!outfile)
 597                 outfile = tcc_default_target(s, default_file);
 598             ret = !!tcc_output_file(s, outfile);
 599             /* dump collected dependencies */
 600             if (gen_deps && !ret)
 601                 tcc_gen_makedeps(s, outfile, deps_outfile);
 602         }
 603     }
 604
 605     tcc_delete(s);
 606     cstr_free(&linker_arg);
 607     tcc_free(outfile);
 608
 609 #ifdef MEM_DEBUG
 610     if (do_bench) {
 611         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 612     }
 613 #endif
 614     return ret;
 615 }