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 void exec_other_tcc(TCCState *s, int argc,char **argv,int optarg)
 216 {
 217 #ifdef TCC_TARGET_X86_64
 218 #define WIN32_CAST
 219     char arg[20]="i386-tcc";
 220     char sep='/',*tcc;
 221     if (32 == optarg) {/* -m32 launches 32 bit tcc */
 222 #ifdef TCC_TARGET_PE
 223 #ifdef _WIN32
 224 #define WIN32_CAST (const char**)(const char *)
 225         strcpy(arg,"tcc.exe");
 226         sep='\\';
 227 #else
 228         strcpy(arg,"i386-win32-tcc");
 229 #endif
 230 #endif
 231         if (!(tcc=strrchr(argv[0],sep)))
 232             tcc=argv[0];
 233         else tcc++;
 234         if (0<s->verbose) printf("%s->%s\n",tcc,arg);
 235         if (strcmp(tcc,arg)) {
 236             execvp(arg, WIN32_CAST (argv));
 237             error("cross compiler not found!");
 238             exit(1);
 239 #undef WIN32_CAST
 240         } else warning("-m32 infinite loop prevented");
 241     } else warning("usupported option \"-m%s\"",optarg);
 242 #endif
 243 }
 244
 245 static int parse_args(TCCState *s, int argc, char **argv)
 246 {
 247     int optind;
 248     const TCCOption *popt;
 249     const char *optarg, *p1, *r1;
 250     char *r;
 251
 252     optind = 0;
 253     while (optind < argc) {
 254
 255         r = argv[optind++];
 256         if (r[0] != '-' || r[1] == '\0') {
 257             /* add a new file */
 258             dynarray_add((void ***)&files, &nb_files, r);
 259             if (!multiple_files) {
 260                 optind--;
 261                 /* argv[0] will be this file */
 262                 break;
 263             }
 264         } else {
 265             /* find option in table (match only the first chars */
 266             popt = tcc_options;
 267             for(;;) {
 268                 p1 = popt->name;
 269                 if (p1 == NULL)
 270                     error("invalid option -- '%s'", r);
 271                 r1 = r + 1;
 272                 for(;;) {
 273                     if (*p1 == '\0')
 274                         goto option_found;
 275                     if (*r1 != *p1)
 276                         break;
 277                     p1++;
 278                     r1++;
 279                 }
 280                 popt++;
 281             }
 282         option_found:
 283             if (popt->flags & TCC_OPTION_HAS_ARG) {
 284                 if (*r1 != '\0' || (popt->flags & TCC_OPTION_NOSEP)) {
 285                     optarg = r1;
 286                 } else {
 287                     if (optind >= argc)
 288                         error("argument to '%s' is missing", r);
 289                     optarg = argv[optind++];
 290                 }
 291             } else {
 292                 if (*r1 != '\0')
 293                     return 0;
 294                 optarg = NULL;
 295             }
 296
 297             switch(popt->index) {
 298             case TCC_OPTION_HELP:
 299                 return 0;
 300
 301             case TCC_OPTION_I:
 302                 if (tcc_add_include_path(s, optarg) < 0)
 303                     error("too many include paths");
 304                 break;
 305             case TCC_OPTION_D:
 306                 {
 307                     char *sym, *value;
 308                     sym = (char *)optarg;
 309                     value = strchr(sym, '=');
 310                     if (value) {
 311                         *value = '\0';
 312                         value++;
 313                     }
 314                     tcc_define_symbol(s, sym, value);
 315                 }
 316                 break;
 317             case TCC_OPTION_U:
 318                 tcc_undefine_symbol(s, optarg);
 319                 break;
 320             case TCC_OPTION_L:
 321                 tcc_add_library_path(s, optarg);
 322                 break;
 323             case TCC_OPTION_B:
 324                 /* set tcc utilities path (mainly for tcc development) */
 325                 tcc_set_lib_path(s, optarg);
 326                 break;
 327             case TCC_OPTION_l:
 328                 dynarray_add((void ***)&files, &nb_files, r);
 329                 nb_libraries++;
 330                 break;
 331             case TCC_OPTION_pthread:
 332                 /* fixme: these options could be different on your platform */
 333                 if(output_type != TCC_OUTPUT_OBJ){
 334                     dynarray_add((void ***)&files, &nb_files, "-lpthread");
 335                     nb_libraries++;
 336                 }
 337                 tcc_define_symbol(s, "_REENTRANT", "1");
 338                 break;
 339             case TCC_OPTION_bench:
 340                 do_bench = 1;
 341                 break;
 342 #ifdef CONFIG_TCC_BACKTRACE
 343             case TCC_OPTION_bt:
 344                 set_num_callers(atoi(optarg));
 345                 break;
 346 #endif
 347 #ifdef CONFIG_TCC_BCHECK
 348             case TCC_OPTION_b:
 349                 s->do_bounds_check = 1;
 350                 s->do_debug = 1;
 351                 break;
 352 #endif
 353             case TCC_OPTION_g:
 354                 s->do_debug = 1;
 355                 break;
 356             case TCC_OPTION_c:
 357                 multiple_files = 1;
 358                 output_type = TCC_OUTPUT_OBJ;
 359                 break;
 360             case TCC_OPTION_static:
 361                 s->static_link = 1;
 362                 break;
 363             case TCC_OPTION_shared:
 364                 output_type = TCC_OUTPUT_DLL;
 365                 break;
 366             case TCC_OPTION_soname:
 367                 s->soname = optarg;
 368                 break;
 369             case TCC_OPTION_m:
 370                     exec_other_tcc(s,argc+1,argv-1,atoi(optarg));
 371                 break;
 372             case TCC_OPTION_o:
 373                 multiple_files = 1;
 374                 outfile = optarg;
 375                 break;
 376             case TCC_OPTION_r:
 377                 /* generate a .o merging several output files */
 378                 reloc_output = 1;
 379                 output_type = TCC_OUTPUT_OBJ;
 380                 break;
 381             case TCC_OPTION_nostdinc:
 382                 s->nostdinc = 1;
 383                 break;
 384             case TCC_OPTION_nostdlib:
 385                 s->nostdlib = 1;
 386                 break;
 387             case TCC_OPTION_print_search_dirs:
 388                 print_search_dirs = 1;
 389                 break;
 390             case TCC_OPTION_run:
 391                 {
 392                     int argc1;
 393                     char **argv1;
 394                     argc1 = expand_args(&argv1, optarg);
 395                     if (argc1 > 0) {
 396                         parse_args(s, argc1, argv1);
 397                     }
 398                     multiple_files = 0;
 399                     output_type = TCC_OUTPUT_MEMORY;
 400                 }
 401                 break;
 402             case TCC_OPTION_v:
 403                 do {
 404                     if (0 == s->verbose++)
 405                         printf("tcc version %s\n", TCC_VERSION);
 406                 } while (*optarg++ == 'v');
 407                 break;
 408             case TCC_OPTION_f:
 409                 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
 410                     goto unsupported_option;
 411                 break;
 412             case TCC_OPTION_W:
 413                 if (tcc_set_warning(s, optarg, 1) < 0 &&
 414                     s->warn_unsupported)
 415                     goto unsupported_option;
 416                 break;
 417             case TCC_OPTION_w:
 418                 s->warn_none = 1;
 419                 break;
 420             case TCC_OPTION_rdynamic:
 421                 s->rdynamic = 1;
 422                 break;
 423             case TCC_OPTION_Wl:
 424                 {
 425                     if ((r = (char *) tcc_set_linker(s, (char *)optarg, TRUE)))
 426                         error("unsupported linker option '%s'", r);
 427                 }
 428                 break;
 429             case TCC_OPTION_E:
 430                 output_type = TCC_OUTPUT_PREPROCESS;
 431                 break;
 432             case TCC_OPTION_MD:
 433                 gen_deps = 1;
 434                 break;
 435             case TCC_OPTION_MF:
 436                 deps_outfile = optarg;
 437                 break;
 438             case TCC_OPTION_x:
 439                 break;
 440             default:
 441                 if (s->warn_unsupported) {
 442                 unsupported_option:
 443                     warning("unsupported option '%s'", r);
 444                 }
 445                 break;
 446             }
 447         }
 448     }
 449     return optind + 1;
 450 }
 451
 452 int main(int argc, char **argv)
 453 {
 454     int i;
 455     TCCState *s;
 456     int nb_objfiles, ret, optind;
 457     int64_t start_time = 0;
 458
 459     s = tcc_new();
 460
 461     output_type = TCC_OUTPUT_EXE;
 462     outfile = NULL;
 463     multiple_files = 1;
 464     files = NULL;
 465     nb_files = 0;
 466     nb_libraries = 0;
 467     reloc_output = 0;
 468     print_search_dirs = 0;
 469     ret = 0;
 470
 471     optind = parse_args(s, argc - 1, argv + 1);
 472     if (print_search_dirs) {
 473         /* enough for Linux kernel */
 474         printf("install: %s/\n", s->tcc_lib_path);
 475         return 0;
 476     }
 477     if (optind == 0 || nb_files == 0) {
 478         if (optind && s->verbose)
 479             return 0;
 480         help();
 481         return 1;
 482     }
 483
 484     nb_objfiles = nb_files - nb_libraries;
 485
 486     /* if outfile provided without other options, we output an
 487        executable */
 488     if (outfile && output_type == TCC_OUTPUT_MEMORY)
 489         output_type = TCC_OUTPUT_EXE;
 490
 491     /* check -c consistency : only single file handled. XXX: checks file type */
 492     if (output_type == TCC_OUTPUT_OBJ && !reloc_output) {
 493         /* accepts only a single input file */
 494         if (nb_objfiles != 1)
 495             error("cannot specify multiple files with -c");
 496         if (nb_libraries != 0)
 497             error("cannot specify libraries with -c");
 498     }
 499
 500
 501     if (output_type == TCC_OUTPUT_PREPROCESS) {
 502         if (!outfile) {
 503             s->outfile = stdout;
 504         } else {
 505             s->outfile = fopen(outfile, "w");
 506             if (!s->outfile)
 507                 error("could not open '%s'", outfile);
 508         }
 509     }
 510
 511     if (do_bench) {
 512         start_time = getclock_us();
 513     }
 514
 515     tcc_set_output_type(s, output_type);
 516     s->reloc_output = reloc_output;
 517
 518     /* compile or add each files or library */
 519     for(i = 0; i < nb_files && ret == 0; i++) {
 520         const char *filename;
 521
 522         filename = files[i];
 523         if (filename[0] == '-' && filename[1] == 'l') {
 524             if (tcc_add_library(s, filename + 2) < 0) {
 525                 error_noabort("cannot find %s", filename);
 526                 ret = 1;
 527             }
 528         } else {
 529             if (1 == s->verbose)
 530                 printf("-> %s\n", filename);
 531             if (tcc_add_file(s, filename) < 0)
 532                 ret = 1;
 533         }
 534     }
 535
 536     /* free all files */
 537     tcc_free(files);
 538
 539     if (0 == ret) {
 540         if (do_bench)
 541             tcc_print_stats(s, getclock_us() - start_time);
 542
 543         if (s->output_type == TCC_OUTPUT_MEMORY)
 544             ret = tcc_run(s, argc - optind, argv + optind);
 545         else {
 546             if (s->output_type == TCC_OUTPUT_PREPROCESS) {
 547                 if (outfile)
 548                     fclose(s->outfile);
 549             } else {
 550                 ret = tcc_output_file(s, outfile ? outfile : tcc_default_target(s));
 551                 ret = ret ? 1 : 0;
 552             }
 553
 554             /* dump collected dependencies */
 555             if (gen_deps && !ret)
 556                 tcc_gen_makedeps(s, outfile, deps_outfile);
 557         }
 558     }
 559
 560     tcc_delete(s);
 561
 562 #ifdef MEM_DEBUG
 563     if (do_bench) {
 564         printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 565     }
 566 #endif
 567     return ret;
 568 }