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