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