libtcc.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 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 /********************************************************/
  36
  37 #ifdef ONE_SOURCE
  38 #include "tccpp.c"
  39 #include "tccgen.c"
  40 #include "tccelf.c"
  41 #include "tccrun.c"
  42 #ifdef TCC_TARGET_I386
  43 #include "i386-gen.c"
  44 #include "i386-link.c"
  45 #endif
  46 #ifdef TCC_TARGET_ARM
  47 #include "arm-gen.c"
  48 #include "arm-link.c"
  49 #endif
  50 #ifdef TCC_TARGET_ARM64
  51 #include "arm64-gen.c"
  52 #include "arm64-link.c"
  53 #endif
  54 #ifdef TCC_TARGET_C67
  55 #include "c67-gen.c"
  56 #include "c67-link.c"
  57 #endif
  58 #ifdef TCC_TARGET_X86_64
  59 #include "x86_64-gen.c"
  60 #include "x86_64-link.c"
  61 #endif
  62 #ifdef CONFIG_TCC_ASM
  63 #include "tccasm.c"
  64 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  65 #include "i386-asm.c"
  66 #endif
  67 #endif
  68 #ifdef TCC_TARGET_COFF
  69 #include "tcccoff.c"
  70 #endif
  71 #ifdef TCC_TARGET_PE
  72 #include "tccpe.c"
  73 #endif
  74 #endif /* ONE_SOURCE */
  75
  76 /********************************************************/
  77 #ifndef CONFIG_TCC_ASM
  78 ST_FUNC void asm_instr(void)
  79 {
  80     tcc_error("inline asm() not supported");
  81 }
  82 ST_FUNC void asm_global_instr(void)
  83 {
  84     tcc_error("inline asm() not supported");
  85 }
  86 #endif
  87
  88 /********************************************************/
  89 #ifdef _WIN32
  90 ST_FUNC char *normalize_slashes(char *path)
  91 {
  92     char *p;
  93     for (p = path; *p; ++p)
  94         if (*p == '\\')
  95             *p = '/';
  96     return path;
  97 }
  98
  99 static HMODULE tcc_module;
 100
 101 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 102 static void tcc_set_lib_path_w32(TCCState *s)
 103 {
 104     char path[1024], *p;
 105     GetModuleFileNameA(tcc_module, path, sizeof path);
 106     p = tcc_basename(normalize_slashes(strlwr(path)));
 107     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 108         p -= 5;
 109     else if (p > path)
 110         p--;
 111     *p = 0;
 112     tcc_set_lib_path(s, path);
 113 }
 114
 115 #ifdef TCC_TARGET_PE
 116 static void tcc_add_systemdir(TCCState *s)
 117 {
 118     char buf[1000];
 119     GetSystemDirectory(buf, sizeof buf);
 120     tcc_add_library_path(s, normalize_slashes(buf));
 121 }
 122 #endif
 123
 124 #ifdef LIBTCC_AS_DLL
 125 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 126 {
 127     if (DLL_PROCESS_ATTACH == dwReason)
 128         tcc_module = hDll;
 129     return TRUE;
 130 }
 131 #endif
 132 #endif
 133
 134 /********************************************************/
 135 /* copy a string and truncate it. */
 136 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 137 {
 138     char *q, *q_end;
 139     int c;
 140
 141     if (buf_size > 0) {
 142         q = buf;
 143         q_end = buf + buf_size - 1;
 144         while (q < q_end) {
 145             c = *s++;
 146             if (c == '\0')
 147                 break;
 148             *q++ = c;
 149         }
 150         *q = '\0';
 151     }
 152     return buf;
 153 }
 154
 155 /* strcat and truncate. */
 156 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 157 {
 158     int len;
 159     len = strlen(buf);
 160     if (len < buf_size)
 161         pstrcpy(buf + len, buf_size - len, s);
 162     return buf;
 163 }
 164
 165 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 166 {
 167     memcpy(out, in, num);
 168     out[num] = '\0';
 169     return out;
 170 }
 171
 172 /* extract the basename of a file */
 173 PUB_FUNC char *tcc_basename(const char *name)
 174 {
 175     char *p = strchr(name, 0);
 176     while (p > name && !IS_DIRSEP(p[-1]))
 177         --p;
 178     return p;
 179 }
 180
 181 /* extract extension part of a file
 182  *
 183  * (if no extension, return pointer to end-of-string)
 184  */
 185 PUB_FUNC char *tcc_fileextension (const char *name)
 186 {
 187     char *b = tcc_basename(name);
 188     char *e = strrchr(b, '.');
 189     return e ? e : strchr(b, 0);
 190 }
 191
 192 /********************************************************/
 193 /* memory management */
 194
 195 #undef free
 196 #undef malloc
 197 #undef realloc
 198
 199 #ifndef MEM_DEBUG
 200
 201 PUB_FUNC void tcc_free(void *ptr)
 202 {
 203     free(ptr);
 204 }
 205
 206 PUB_FUNC void *tcc_malloc(unsigned long size)
 207 {
 208     void *ptr;
 209     ptr = malloc(size);
 210     if (!ptr && size)
 211         tcc_error("memory full (malloc)");
 212     return ptr;
 213 }
 214
 215 PUB_FUNC void *tcc_mallocz(unsigned long size)
 216 {
 217     void *ptr;
 218     ptr = tcc_malloc(size);
 219     memset(ptr, 0, size);
 220     return ptr;
 221 }
 222
 223 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 224 {
 225     void *ptr1;
 226     ptr1 = realloc(ptr, size);
 227     if (!ptr1 && size)
 228         tcc_error("memory full (realloc)");
 229     return ptr1;
 230 }
 231
 232 PUB_FUNC char *tcc_strdup(const char *str)
 233 {
 234     char *ptr;
 235     ptr = tcc_malloc(strlen(str) + 1);
 236     strcpy(ptr, str);
 237     return ptr;
 238 }
 239
 240 PUB_FUNC void tcc_memstats(int bench)
 241 {
 242 }
 243
 244 #else
 245
 246 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 247 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 248 #define MEM_DEBUG_FILE_LEN 15
 249
 250 struct mem_debug_header {
 251     size_t      magic1;
 252     size_t      size;
 253     struct mem_debug_header *prev;
 254     struct mem_debug_header *next;
 255     size_t      line_num;
 256     char        file_name[MEM_DEBUG_FILE_LEN + 1];
 257     size_t      magic2;
 258 };
 259
 260 typedef struct mem_debug_header mem_debug_header_t;
 261
 262 static mem_debug_header_t *mem_debug_chain;
 263 static size_t mem_cur_size;
 264 static size_t mem_max_size;
 265
 266 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 267 {
 268     void *ptr;
 269     int ofs;
 270
 271     mem_debug_header_t *header;
 272
 273     ptr = malloc(sizeof(mem_debug_header_t) + size);
 274     if (!ptr)
 275         tcc_error("memory full (malloc)");
 276
 277     mem_cur_size += size;
 278     if (mem_cur_size > mem_max_size)
 279         mem_max_size = mem_cur_size;
 280
 281     header = (mem_debug_header_t *)ptr;
 282
 283     header->magic1 = MEM_DEBUG_MAGIC1;
 284     header->magic2 = MEM_DEBUG_MAGIC2;
 285     header->size = size;
 286     header->line_num = line;
 287
 288     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 289     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 290     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 291
 292     header->next = mem_debug_chain;
 293     header->prev = NULL;
 294
 295     if (header->next)
 296         header->next->prev = header;
 297
 298     mem_debug_chain = header;
 299
 300     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 301     return ptr;
 302 }
 303
 304 PUB_FUNC void tcc_free_debug(void *ptr)
 305 {
 306     mem_debug_header_t *header;
 307
 308     if (!ptr)
 309         return;
 310
 311     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 312     header = (mem_debug_header_t *)ptr;
 313     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 314         header->magic2 != MEM_DEBUG_MAGIC2 ||
 315         header->size == (size_t)-1 )
 316     {
 317         tcc_error("tcc_free check failed");
 318     }
 319
 320     mem_cur_size -= header->size;
 321     header->size = (size_t)-1;
 322
 323     if (header->next)
 324         header->next->prev = header->prev;
 325
 326     if (header->prev)
 327         header->prev->next = header->next;
 328
 329     if (header == mem_debug_chain)
 330         mem_debug_chain = header->next;
 331
 332     free(ptr);
 333 }
 334
 335
 336 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 337 {
 338     void *ptr;
 339     ptr = tcc_malloc_debug(size,file,line);
 340     memset(ptr, 0, size);
 341     return ptr;
 342 }
 343
 344 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 345 {
 346     mem_debug_header_t *header;
 347     int mem_debug_chain_update = 0;
 348
 349     if (!ptr) {
 350         ptr = tcc_malloc_debug(size, file, line);
 351         return ptr;
 352     }
 353
 354     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 355     header = (mem_debug_header_t *)ptr;
 356     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 357         header->magic2 != MEM_DEBUG_MAGIC2 ||
 358         header->size == (size_t)-1 )
 359     {
 360         check_error:
 361             tcc_error("tcc_realloc check failed");
 362     }
 363
 364     mem_debug_chain_update = (header == mem_debug_chain);
 365
 366     mem_cur_size -= header->size;
 367     ptr = realloc(ptr, sizeof(mem_debug_header_t) + size);
 368     if (!ptr)
 369         tcc_error("memory full (realloc)");
 370
 371     header = (mem_debug_header_t *)ptr;
 372     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 373         header->magic2 != MEM_DEBUG_MAGIC2)
 374     {
 375         goto check_error;
 376     }
 377
 378     mem_cur_size += size;
 379     if (mem_cur_size > mem_max_size)
 380         mem_max_size = mem_cur_size;
 381
 382     header->size = size;
 383     if (header->next)
 384         header->next->prev = header;
 385
 386     if (header->prev)
 387         header->prev->next = header;
 388
 389     if (mem_debug_chain_update)
 390         mem_debug_chain = header;
 391
 392     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 393     return ptr;
 394 }
 395
 396 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 397 {
 398     char *ptr;
 399     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 400     strcpy(ptr, str);
 401     return ptr;
 402 }
 403
 404 PUB_FUNC void tcc_memstats(int bench)
 405 {
 406     if (mem_cur_size) {
 407         mem_debug_header_t *header = mem_debug_chain;
 408
 409         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 410             mem_cur_size, mem_max_size);
 411
 412         while (header) {
 413             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 414                 header->file_name, header->line_num, header->size);
 415             header = header->next;
 416         }
 417     }
 418     else if (bench)
 419         fprintf(stderr, "mem_max_size= %d bytes\n", mem_max_size);
 420 }
 421
 422 #undef MEM_DEBUG_MAGIC1
 423 #undef MEM_DEBUG_MAGIC2
 424 #undef MEM_DEBUG_FILE_LEN
 425
 426 #endif
 427
 428 #define free(p) use_tcc_free(p)
 429 #define malloc(s) use_tcc_malloc(s)
 430 #define realloc(p, s) use_tcc_realloc(p, s)
 431
 432 /********************************************************/
 433 /* dynarrays */
 434
 435 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 436 {
 437     int nb, nb_alloc;
 438     void **pp;
 439
 440     nb = *nb_ptr;
 441     pp = *ptab;
 442     /* every power of two we double array size */
 443     if ((nb & (nb - 1)) == 0) {
 444         if (!nb)
 445             nb_alloc = 1;
 446         else
 447             nb_alloc = nb * 2;
 448         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 449         *ptab = pp;
 450     }
 451     pp[nb++] = data;
 452     *nb_ptr = nb;
 453 }
 454
 455 ST_FUNC void dynarray_reset(void *pp, int *n)
 456 {
 457     void **p;
 458     for (p = *(void***)pp; *n; ++p, --*n)
 459         if (*p)
 460             tcc_free(*p);
 461     tcc_free(*(void**)pp);
 462     *(void**)pp = NULL;
 463 }
 464
 465 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 466 {
 467     const char *p;
 468     do {
 469         int c;
 470         CString str;
 471
 472         cstr_new(&str);
 473         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 474             if (c == '{' && p[1] && p[2] == '}') {
 475                 c = p[1], p += 2;
 476                 if (c == 'B')
 477                     cstr_cat(&str, s->tcc_lib_path, -1);
 478             } else {
 479                 cstr_ccat(&str, c);
 480             }
 481         }
 482         if (str.size) {
 483             cstr_ccat(&str, '\0');
 484             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 485         }
 486         cstr_free(&str);
 487         in = p+1;
 488     } while (*p);
 489 }
 490
 491 /********************************************************/
 492
 493 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 494 {
 495     int len;
 496     len = strlen(buf);
 497     vsnprintf(buf + len, buf_size - len, fmt, ap);
 498 }
 499
 500 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 501 {
 502     va_list ap;
 503     va_start(ap, fmt);
 504     strcat_vprintf(buf, buf_size, fmt, ap);
 505     va_end(ap);
 506 }
 507
 508 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 509 {
 510     char buf[2048];
 511     BufferedFile **pf, *f;
 512
 513     buf[0] = '\0';
 514     /* use upper file if inline ":asm:" or token ":paste:" */
 515     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 516      ;
 517     if (f) {
 518         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 519             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 520                 (*pf)->filename, (*pf)->line_num);
 521         if (f->line_num > 0) {
 522             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 523                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 524         } else {
 525             strcat_printf(buf, sizeof(buf), "%s: ",
 526                 f->filename);
 527         }
 528     } else {
 529         strcat_printf(buf, sizeof(buf), "tcc: ");
 530     }
 531     if (is_warning)
 532         strcat_printf(buf, sizeof(buf), "warning: ");
 533     else
 534         strcat_printf(buf, sizeof(buf), "error: ");
 535     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 536
 537     if (!s1->error_func) {
 538         /* default case: stderr */
 539         if (s1->ppfp) /* print a newline during tcc -E */
 540             fprintf(s1->ppfp, "\n"), fflush(s1->ppfp);
 541         fprintf(stderr, "%s\n", buf);
 542         fflush(stderr); /* print error/warning now (win32) */
 543     } else {
 544         s1->error_func(s1->error_opaque, buf);
 545     }
 546     if (!is_warning || s1->warn_error)
 547         s1->nb_errors++;
 548 }
 549
 550 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 551                         void (*error_func)(void *opaque, const char *msg))
 552 {
 553     s->error_opaque = error_opaque;
 554     s->error_func = error_func;
 555 }
 556
 557 /* error without aborting current compilation */
 558 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 559 {
 560     TCCState *s1 = tcc_state;
 561     va_list ap;
 562
 563     va_start(ap, fmt);
 564     error1(s1, 0, fmt, ap);
 565     va_end(ap);
 566 }
 567
 568 PUB_FUNC void tcc_error(const char *fmt, ...)
 569 {
 570     TCCState *s1 = tcc_state;
 571     va_list ap;
 572
 573     va_start(ap, fmt);
 574     error1(s1, 0, fmt, ap);
 575     va_end(ap);
 576     /* better than nothing: in some cases, we accept to handle errors */
 577     if (s1->error_set_jmp_enabled) {
 578         longjmp(s1->error_jmp_buf, 1);
 579     } else {
 580         /* XXX: eliminate this someday */
 581         exit(1);
 582     }
 583 }
 584
 585 PUB_FUNC void tcc_warning(const char *fmt, ...)
 586 {
 587     TCCState *s1 = tcc_state;
 588     va_list ap;
 589
 590     if (s1->warn_none)
 591         return;
 592
 593     va_start(ap, fmt);
 594     error1(s1, 1, fmt, ap);
 595     va_end(ap);
 596 }
 597
 598 /********************************************************/
 599 /* I/O layer */
 600
 601 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 602 {
 603     BufferedFile *bf;
 604     int buflen = initlen ? initlen : IO_BUF_SIZE;
 605
 606     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 607     bf->buf_ptr = bf->buffer;
 608     bf->buf_end = bf->buffer + initlen;
 609     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 610     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 611 #ifdef _WIN32
 612     normalize_slashes(bf->filename);
 613 #endif
 614     bf->line_num = 1;
 615     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 616     bf->fd = -1;
 617     bf->prev = file;
 618     file = bf;
 619 }
 620
 621 ST_FUNC void tcc_close(void)
 622 {
 623     BufferedFile *bf = file;
 624     if (bf->fd > 0) {
 625         close(bf->fd);
 626         total_lines += bf->line_num;
 627     }
 628     file = bf->prev;
 629     tcc_free(bf);
 630 }
 631
 632 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 633 {
 634     int fd;
 635     if (strcmp(filename, "-") == 0)
 636         fd = 0, filename = "<stdin>";
 637     else
 638         fd = open(filename, O_RDONLY | O_BINARY);
 639     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 640         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 641                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 642     if (fd < 0)
 643         return -1;
 644
 645     tcc_open_bf(s1, filename, 0);
 646     file->fd = fd;
 647     return fd;
 648 }
 649
 650 /* compile the C file opened in 'file'. Return non zero if errors. */
 651 static int tcc_compile(TCCState *s1)
 652 {
 653     Sym *define_start;
 654
 655     preprocess_start(s1);
 656     define_start = define_stack;
 657
 658     if (setjmp(s1->error_jmp_buf) == 0) {
 659         s1->nb_errors = 0;
 660         s1->error_set_jmp_enabled = 1;
 661
 662         tccgen_start(s1);
 663 #ifdef INC_DEBUG
 664         printf("%s: **** new file\n", file->filename);
 665 #endif
 666         ch = file->buf_ptr[0];
 667         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 668         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
 669         next();
 670         decl(VT_CONST);
 671         if (tok != TOK_EOF)
 672             expect("declaration");
 673         /* reset define stack, but keep -D and built-ins */
 674         free_defines(define_start);
 675         tccgen_end(s1);
 676     }
 677     s1->error_set_jmp_enabled = 0;
 678
 679     free_inline_functions(s1);
 680     sym_pop(&global_stack, NULL);
 681     sym_pop(&local_stack, NULL);
 682     return s1->nb_errors != 0 ? -1 : 0;
 683 }
 684
 685 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 686 {
 687     int len, ret;
 688
 689     len = strlen(str);
 690     tcc_open_bf(s, "<string>", len);
 691     memcpy(file->buffer, str, len);
 692     ret = tcc_compile(s);
 693     tcc_close();
 694     return ret;
 695 }
 696
 697 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 698 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 699 {
 700     int len1, len2;
 701     /* default value */
 702     if (!value)
 703         value = "1";
 704     len1 = strlen(sym);
 705     len2 = strlen(value);
 706
 707     /* init file structure */
 708     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 709     memcpy(file->buffer, sym, len1);
 710     file->buffer[len1] = ' ';
 711     memcpy(file->buffer + len1 + 1, value, len2);
 712
 713     /* parse with define parser */
 714     ch = file->buf_ptr[0];
 715     next_nomacro();
 716     parse_define();
 717
 718     tcc_close();
 719 }
 720
 721 /* undefine a preprocessor symbol */
 722 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 723 {
 724     TokenSym *ts;
 725     Sym *s;
 726     ts = tok_alloc(sym, strlen(sym));
 727     s = define_find(ts->tok);
 728     /* undefine symbol by putting an invalid name */
 729     if (s)
 730         define_undef(s);
 731 }
 732
 733 /* cleanup all static data used during compilation */
 734 static void tcc_cleanup(void)
 735 {
 736     if (NULL == tcc_state)
 737         return;
 738     tccpp_delete(tcc_state);
 739     tcc_state = NULL;
 740     /* free sym_pools */
 741     dynarray_reset(&sym_pools, &nb_sym_pools);
 742     /* reset symbol stack */
 743     sym_free_first = NULL;
 744 }
 745
 746 LIBTCCAPI TCCState *tcc_new(void)
 747 {
 748     TCCState *s;
 749
 750     tcc_cleanup();
 751
 752     s = tcc_mallocz(sizeof(TCCState));
 753     if (!s)
 754         return NULL;
 755     tcc_state = s;
 756
 757     s->alacarte_link = 1;
 758     s->nocommon = 1;
 759     s->warn_implicit_function_declaration = 1;
 760     s->ms_bitfields = 0;
 761
 762 #ifdef CHAR_IS_UNSIGNED
 763     s->char_is_unsigned = 1;
 764 #endif
 765 #ifdef TCC_TARGET_I386
 766     s->seg_size = 32;
 767 #endif
 768 #ifdef TCC_IS_NATIVE
 769     s->runtime_main = "main";
 770 #endif
 771     /* enable this if you want symbols with leading underscore on windows: */
 772 #if 0 /* def TCC_TARGET_PE */
 773     s->leading_underscore = 1;
 774 #endif
 775 #ifdef _WIN32
 776     tcc_set_lib_path_w32(s);
 777 #else
 778     tcc_set_lib_path(s, CONFIG_TCCDIR);
 779 #endif
 780     tccelf_new(s);
 781     tccpp_new(s);
 782
 783     /* we add dummy defines for some special macros to speed up tests
 784        and to have working defined() */
 785     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 786     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 787     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 788     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 789     {
 790         /* define __TINYC__ 92X  */
 791         char buffer[32]; int a,b,c;
 792         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 793         sprintf(buffer, "%d", a*10000 + b*100 + c);
 794         tcc_define_symbol(s, "__TINYC__", buffer);
 795     }
 796
 797     /* standard defines */
 798     tcc_define_symbol(s, "__STDC__", NULL);
 799     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 800     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 801
 802     /* target defines */
 803 #if defined(TCC_TARGET_I386)
 804     tcc_define_symbol(s, "__i386__", NULL);
 805     tcc_define_symbol(s, "__i386", NULL);
 806     tcc_define_symbol(s, "i386", NULL);
 807 #elif defined(TCC_TARGET_X86_64)
 808     tcc_define_symbol(s, "__x86_64__", NULL);
 809 #elif defined(TCC_TARGET_ARM)
 810     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 811     tcc_define_symbol(s, "__arm_elf__", NULL);
 812     tcc_define_symbol(s, "__arm_elf", NULL);
 813     tcc_define_symbol(s, "arm_elf", NULL);
 814     tcc_define_symbol(s, "__arm__", NULL);
 815     tcc_define_symbol(s, "__arm", NULL);
 816     tcc_define_symbol(s, "arm", NULL);
 817     tcc_define_symbol(s, "__APCS_32__", NULL);
 818     tcc_define_symbol(s, "__ARMEL__", NULL);
 819 #if defined(TCC_ARM_EABI)
 820     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 821 #endif
 822 #if defined(TCC_ARM_HARDFLOAT)
 823     s->float_abi = ARM_HARD_FLOAT;
 824     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 825 #else
 826     s->float_abi = ARM_SOFTFP_FLOAT;
 827 #endif
 828 #elif defined(TCC_TARGET_ARM64)
 829     tcc_define_symbol(s, "__aarch64__", NULL);
 830 #endif
 831
 832 #ifdef TCC_TARGET_PE
 833     tcc_define_symbol(s, "_WIN32", NULL);
 834 # ifdef TCC_TARGET_X86_64
 835     tcc_define_symbol(s, "_WIN64", NULL);
 836 # endif
 837 #else
 838     tcc_define_symbol(s, "__unix__", NULL);
 839     tcc_define_symbol(s, "__unix", NULL);
 840     tcc_define_symbol(s, "unix", NULL);
 841 # if defined(__linux__)
 842     tcc_define_symbol(s, "__linux__", NULL);
 843     tcc_define_symbol(s, "__linux", NULL);
 844 # endif
 845 # if defined(__FreeBSD__)
 846     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 847     /* No 'Thread Storage Local' on FreeBSD with tcc */
 848     tcc_define_symbol(s, "__NO_TLS", NULL);
 849 # endif
 850 # if defined(__FreeBSD_kernel__)
 851     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 852 # endif
 853 #endif
 854 # if defined(__NetBSD__)
 855     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 856 # endif
 857 # if defined(__OpenBSD__)
 858     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 859 # endif
 860
 861     /* TinyCC & gcc defines */
 862 #if defined(TCC_TARGET_PE) && defined(TCC_TARGET_X86_64)
 863     /* 64bit Windows. */
 864     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 865     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 866     tcc_define_symbol(s, "__LLP64__", NULL);
 867 #elif defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_ARM64)
 868     /* Other 64bit systems. */
 869     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 870     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 871     tcc_define_symbol(s, "__LP64__", NULL);
 872 #else
 873     /* Other 32bit systems. */
 874     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 875     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 876     tcc_define_symbol(s, "__ILP32__", NULL);
 877 #endif
 878
 879 #ifdef TCC_TARGET_PE
 880     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 881     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 882 #else
 883     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 884     /* wint_t is unsigned int by default, but (signed) int on BSDs
 885        and unsigned short on windows.  Other OSes might have still
 886        other conventions, sigh.  */
 887 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 888   || defined(__NetBSD__) || defined(__OpenBSD__)
 889     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 890 #  ifdef __FreeBSD__
 891     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 892        that are unconditionally used in FreeBSDs other system headers :/ */
 893     tcc_define_symbol(s, "__GNUC__", "2");
 894     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 895     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 896 #  endif
 897 # else
 898     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 899     /* glibc defines */
 900     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 901         "name proto __asm__ (#alias)");
 902     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 903         "name proto __asm__ (#alias) __THROW");
 904 # endif
 905 #endif /* ndef TCC_TARGET_PE */
 906
 907     return s;
 908 }
 909
 910 LIBTCCAPI void tcc_delete(TCCState *s1)
 911 {
 912     int bench = s1->do_bench;
 913
 914     tcc_cleanup();
 915
 916     /* free sections */
 917     tccelf_delete(s1);
 918
 919     /* free library paths */
 920     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 921     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 922
 923     /* free include paths */
 924     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
 925     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 926     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 927
 928     tcc_free(s1->tcc_lib_path);
 929     tcc_free(s1->soname);
 930     tcc_free(s1->rpath);
 931     tcc_free(s1->init_symbol);
 932     tcc_free(s1->fini_symbol);
 933     tcc_free(s1->outfile);
 934     tcc_free(s1->deps_outfile);
 935     dynarray_reset(&s1->files, &s1->nb_files);
 936     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 937     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 938
 939 #ifdef TCC_IS_NATIVE
 940     /* free runtime memory */
 941     tcc_run_free(s1);
 942 #endif
 943
 944     tcc_free(s1);
 945     tcc_memstats(bench);
 946 }
 947
 948 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 949 {
 950     s->output_type = output_type;
 951
 952     /* always elf for objects */
 953     if (output_type == TCC_OUTPUT_OBJ)
 954         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 955
 956     if (s->char_is_unsigned)
 957         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 958
 959     if (!s->nostdinc) {
 960         /* default include paths */
 961         /* -isystem paths have already been handled */
 962         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 963     }
 964
 965 #ifdef CONFIG_TCC_BCHECK
 966     if (s->do_bounds_check) {
 967         /* if bound checking, then add corresponding sections */
 968         tccelf_bounds_new(s);
 969         /* define symbol */
 970         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 971     }
 972 #endif
 973     if (s->do_debug) {
 974         /* add debug sections */
 975         tccelf_stab_new(s);
 976     }
 977
 978     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 979
 980 #ifdef TCC_TARGET_PE
 981 # ifdef _WIN32
 982     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
 983         tcc_add_systemdir(s);
 984 # endif
 985 #else
 986     /* paths for crt objects */
 987     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 988     /* add libc crt1/crti objects */
 989     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
 990         !s->nostdlib) {
 991         if (output_type != TCC_OUTPUT_DLL)
 992             tcc_add_crt(s, "crt1.o");
 993         tcc_add_crt(s, "crti.o");
 994     }
 995 #endif
 996     return 0;
 997 }
 998
 999 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1000 {
1001     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1002     return 0;
1003 }
1004
1005 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1006 {
1007     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1008     return 0;
1009 }
1010
1011 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1012 {
1013     int ret, filetype;
1014
1015     filetype = flags & 0x0F;
1016     if (filetype == 0) {
1017         /* use a file extension to detect a filetype */
1018         const char *ext = tcc_fileextension(filename);
1019         if (ext[0]) {
1020             ext++;
1021             if (!strcmp(ext, "S"))
1022                 filetype = AFF_TYPE_ASMPP;
1023             else if (!strcmp(ext, "s"))
1024                 filetype = AFF_TYPE_ASM;
1025             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1026                 filetype = AFF_TYPE_C;
1027             else
1028                 filetype = AFF_TYPE_BIN;
1029         } else {
1030             filetype = AFF_TYPE_C;
1031         }
1032     }
1033
1034     /* open the file */
1035     ret = tcc_open(s1, filename);
1036     if (ret < 0) {
1037         if (flags & AFF_PRINT_ERROR)
1038             tcc_error_noabort("file '%s' not found", filename);
1039         return ret;
1040     }
1041
1042     /* update target deps */
1043     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1044             tcc_strdup(filename));
1045
1046     parse_flags = 0;
1047     /* if .S file, define __ASSEMBLER__ like gcc does */
1048     if (filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP) {
1049         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1050         parse_flags = PARSE_FLAG_ASM_FILE;
1051     }
1052
1053     if (flags & AFF_PREPROCESS) {
1054         ret = tcc_preprocess(s1);
1055     } else if (filetype == AFF_TYPE_C) {
1056         ret = tcc_compile(s1);
1057 #ifdef CONFIG_TCC_ASM
1058     } else if (filetype == AFF_TYPE_ASMPP) {
1059         /* non preprocessed assembler */
1060         ret = tcc_assemble(s1, 1);
1061     } else if (filetype == AFF_TYPE_ASM) {
1062         /* preprocessed assembler */
1063         ret = tcc_assemble(s1, 0);
1064 #endif
1065     } else {
1066         ElfW(Ehdr) ehdr;
1067         int fd, obj_type;
1068
1069         fd = file->fd;
1070         obj_type = tcc_object_type(fd, &ehdr);
1071         lseek(fd, 0, SEEK_SET);
1072
1073         /* do not display line number if error */
1074         file->line_num = 0;
1075
1076         switch (obj_type) {
1077         case AFF_BINTYPE_REL:
1078             ret = tcc_load_object_file(s1, fd, 0);
1079             break;
1080 #ifndef TCC_TARGET_PE
1081         case AFF_BINTYPE_DYN:
1082             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1083                 ret = 0;
1084 #ifdef TCC_IS_NATIVE
1085                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1086                     ret = -1;
1087 #endif
1088             } else {
1089                 ret = tcc_load_dll(s1, fd, filename,
1090                                    (flags & AFF_REFERENCED_DLL) != 0);
1091             }
1092             break;
1093 #endif
1094         case AFF_BINTYPE_AR:
1095             ret = tcc_load_archive(s1, fd);
1096             break;
1097 #ifdef TCC_TARGET_COFF
1098         case AFF_BINTYPE_C67:
1099             ret = tcc_load_coff(s1, fd);
1100             break;
1101 #endif
1102         default:
1103 #ifdef TCC_TARGET_PE
1104             ret = pe_load_file(s1, filename, fd);
1105 #else
1106             /* as GNU ld, consider it is an ld script if not recognized */
1107             ret = tcc_load_ldscript(s1);
1108 #endif
1109             if (ret < 0)
1110                 tcc_error_noabort("unrecognized file type");
1111             break;
1112         }
1113     }
1114     tcc_close();
1115     return ret;
1116 }
1117
1118 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1119 {
1120     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1121         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS | s->filetype);
1122     else
1123         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | s->filetype);
1124 }
1125
1126 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1127 {
1128     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1129     return 0;
1130 }
1131
1132 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1133     const char *filename, int flags, char **paths, int nb_paths)
1134 {
1135     char buf[1024];
1136     int i;
1137
1138     for(i = 0; i < nb_paths; i++) {
1139         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1140         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1141             return 0;
1142     }
1143     return -1;
1144 }
1145
1146 #ifndef TCC_TARGET_PE
1147 /* find and load a dll. Return non zero if not found */
1148 /* XXX: add '-rpath' option support ? */
1149 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1150 {
1151     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1152         s->library_paths, s->nb_library_paths);
1153 }
1154 #endif
1155
1156 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1157 {
1158     if (-1 == tcc_add_library_internal(s, "%s/%s",
1159         filename, 0, s->crt_paths, s->nb_crt_paths))
1160         tcc_error_noabort("file '%s' not found", filename);
1161     return 0;
1162 }
1163
1164 /* the library name is the same as the argument of the '-l' option */
1165 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1166 {
1167 #ifdef TCC_TARGET_PE
1168     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1169     const char **pp = s->static_link ? libs + 4 : libs;
1170 #else
1171     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1172     const char **pp = s->static_link ? libs + 1 : libs;
1173 #endif
1174     while (*pp) {
1175         if (0 == tcc_add_library_internal(s, *pp,
1176             libraryname, 0, s->library_paths, s->nb_library_paths))
1177             return 0;
1178         ++pp;
1179     }
1180     return -1;
1181 }
1182
1183 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1184 {
1185     int ret = tcc_add_library(s, libname);
1186     if (ret < 0)
1187         tcc_error_noabort("library 'lib%s' not found", libname);
1188     return ret;
1189 }
1190
1191 /* habdle #pragma comment(lib,) */
1192 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1193 {
1194     int i;
1195     for (i = 0; i < s1->nb_pragma_libs; i++)
1196         tcc_add_library_err(s1, s1->pragma_libs[i]);
1197 }
1198
1199 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1200 {
1201 #ifdef TCC_TARGET_PE
1202     /* On x86_64 'val' might not be reachable with a 32bit offset.
1203        So it is handled here as if it were in a DLL. */
1204     pe_putimport(s, 0, name, (uintptr_t)val);
1205 #else
1206     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1207         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1208         SHN_ABS, name);
1209 #endif
1210     return 0;
1211 }
1212
1213 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1214 {
1215     tcc_free(s->tcc_lib_path);
1216     s->tcc_lib_path = tcc_strdup(path);
1217 }
1218
1219 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1220 #define FD_INVERT 0x0002 /* invert value before storing */
1221
1222 typedef struct FlagDef {
1223     uint16_t offset;
1224     uint16_t flags;
1225     const char *name;
1226 } FlagDef;
1227
1228 static const FlagDef warning_defs[] = {
1229     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1230     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1231     { offsetof(TCCState, warn_error), 0, "error" },
1232     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1233       "implicit-function-declaration" },
1234 };
1235
1236 static int no_flag(const char **pp)
1237 {
1238     const char *p = *pp;
1239     if (*p != 'n' || *++p != 'o' || *++p != '-')
1240         return 0;
1241     *pp = p + 1;
1242     return 1;
1243 }
1244
1245 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1246                     const char *name, int value)
1247 {
1248     int i;
1249     const FlagDef *p;
1250     const char *r;
1251
1252     r = name;
1253     if (no_flag(&r))
1254         value = !value;
1255
1256     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1257         if (!strcmp(r, p->name))
1258             goto found;
1259     }
1260     return -1;
1261  found:
1262     if (p->flags & FD_INVERT)
1263         value = !value;
1264     *(int *)((uint8_t *)s + p->offset) = value;
1265     return 0;
1266 }
1267
1268 /* set/reset a warning */
1269 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1270 {
1271     int i;
1272     const FlagDef *p;
1273
1274     if (!strcmp(warning_name, "all")) {
1275         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1276             if (p->flags & WD_ALL)
1277                 *(int *)((uint8_t *)s + p->offset) = 1;
1278         }
1279         return 0;
1280     } else {
1281         return set_flag(s, warning_defs, countof(warning_defs),
1282                         warning_name, value);
1283     }
1284 }
1285
1286 static const FlagDef flag_defs[] = {
1287     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1288     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1289     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1290     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1291     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1292     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1293     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1294 };
1295
1296 /* set/reset a flag */
1297 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1298 {
1299     return set_flag(s, flag_defs, countof(flag_defs),
1300                     flag_name, value);
1301 }
1302
1303
1304 static int strstart(const char *val, const char **str)
1305 {
1306     const char *p, *q;
1307     p = *str;
1308     q = val;
1309     while (*q) {
1310         if (*p != *q)
1311             return 0;
1312         p++;
1313         q++;
1314     }
1315     *str = p;
1316     return 1;
1317 }
1318
1319 /* Like strstart, but automatically takes into account that ld options can
1320  *
1321  * - start with double or single dash (e.g. '--soname' or '-soname')
1322  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1323  *   or '-Wl,-soname=x.so')
1324  *
1325  * you provide `val` always in 'option[=]' form (no leading -)
1326  */
1327 static int link_option(const char *str, const char *val, const char **ptr)
1328 {
1329     const char *p, *q;
1330     int ret;
1331
1332     /* there should be 1 or 2 dashes */
1333     if (*str++ != '-')
1334         return 0;
1335     if (*str == '-')
1336         str++;
1337
1338     /* then str & val should match (potentialy up to '=') */
1339     p = str;
1340     q = val;
1341
1342     ret = 1;
1343     if (q[0] == '?') {
1344         ++q;
1345         if (no_flag(&p))
1346             ret = -1;
1347     }
1348
1349     while (*q != '\0' && *q != '=') {
1350         if (*p != *q)
1351             return 0;
1352         p++;
1353         q++;
1354     }
1355
1356     /* '=' near eos means ',' or '=' is ok */
1357     if (*q == '=') {
1358         if (*p == 0)
1359             *ptr = p;
1360         if (*p != ',' && *p != '=')
1361             return 0;
1362         p++;
1363     }
1364     *ptr = p;
1365     return ret;
1366 }
1367
1368 static const char *skip_linker_arg(const char **str)
1369 {
1370     const char *s1 = *str;
1371     const char *s2 = strchr(s1, ',');
1372     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1373     return s2;
1374 }
1375
1376 static char *copy_linker_arg(const char *p)
1377 {
1378     const char *q = p;
1379     skip_linker_arg(&q);
1380     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1381 }
1382
1383 /* set linker options */
1384 static int tcc_set_linker(TCCState *s, const char *option)
1385 {
1386     while (*option) {
1387
1388         const char *p = NULL;
1389         char *end = NULL;
1390         int ignoring = 0;
1391         int ret;
1392
1393         if (link_option(option, "Bsymbolic", &p)) {
1394             s->symbolic = 1;
1395         } else if (link_option(option, "nostdlib", &p)) {
1396             s->nostdlib = 1;
1397         } else if (link_option(option, "fini=", &p)) {
1398             s->fini_symbol = copy_linker_arg(p);
1399             ignoring = 1;
1400         } else if (link_option(option, "image-base=", &p)
1401                 || link_option(option, "Ttext=", &p)) {
1402             s->text_addr = strtoull(p, &end, 16);
1403             s->has_text_addr = 1;
1404         } else if (link_option(option, "init=", &p)) {
1405             s->init_symbol = copy_linker_arg(p);
1406             ignoring = 1;
1407         } else if (link_option(option, "oformat=", &p)) {
1408 #if defined(TCC_TARGET_PE)
1409             if (strstart("pe-", &p)) {
1410 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1411             if (strstart("elf64-", &p)) {
1412 #else
1413             if (strstart("elf32-", &p)) {
1414 #endif
1415                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1416             } else if (!strcmp(p, "binary")) {
1417                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1418 #ifdef TCC_TARGET_COFF
1419             } else if (!strcmp(p, "coff")) {
1420                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1421 #endif
1422             } else
1423                 goto err;
1424
1425         } else if (link_option(option, "as-needed", &p)) {
1426             ignoring = 1;
1427         } else if (link_option(option, "O", &p)) {
1428             ignoring = 1;
1429         } else if (link_option(option, "rpath=", &p)) {
1430             s->rpath = copy_linker_arg(p);
1431         } else if (link_option(option, "section-alignment=", &p)) {
1432             s->section_align = strtoul(p, &end, 16);
1433         } else if (link_option(option, "soname=", &p)) {
1434             s->soname = copy_linker_arg(p);
1435 #ifdef TCC_TARGET_PE
1436         } else if (link_option(option, "file-alignment=", &p)) {
1437             s->pe_file_align = strtoul(p, &end, 16);
1438         } else if (link_option(option, "stack=", &p)) {
1439             s->pe_stack_size = strtoul(p, &end, 10);
1440         } else if (link_option(option, "subsystem=", &p)) {
1441 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1442             if (!strcmp(p, "native")) {
1443                 s->pe_subsystem = 1;
1444             } else if (!strcmp(p, "console")) {
1445                 s->pe_subsystem = 3;
1446             } else if (!strcmp(p, "gui")) {
1447                 s->pe_subsystem = 2;
1448             } else if (!strcmp(p, "posix")) {
1449                 s->pe_subsystem = 7;
1450             } else if (!strcmp(p, "efiapp")) {
1451                 s->pe_subsystem = 10;
1452             } else if (!strcmp(p, "efiboot")) {
1453                 s->pe_subsystem = 11;
1454             } else if (!strcmp(p, "efiruntime")) {
1455                 s->pe_subsystem = 12;
1456             } else if (!strcmp(p, "efirom")) {
1457                 s->pe_subsystem = 13;
1458 #elif defined(TCC_TARGET_ARM)
1459             if (!strcmp(p, "wince")) {
1460                 s->pe_subsystem = 9;
1461 #endif
1462             } else
1463                 goto err;
1464 #endif
1465         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1466             s->alacarte_link = ret < 0;
1467         } else if (p) {
1468             return 0;
1469         } else {
1470     err:
1471             tcc_error("unsupported linker option '%s'", option);
1472         }
1473
1474         if (ignoring && s->warn_unsupported)
1475             tcc_warning("unsupported linker option '%s'", option);
1476
1477         option = skip_linker_arg(&p);
1478     }
1479     return 1;
1480 }
1481
1482 typedef struct TCCOption {
1483     const char *name;
1484     uint16_t index;
1485     uint16_t flags;
1486 } TCCOption;
1487
1488 enum {
1489     TCC_OPTION_HELP,
1490     TCC_OPTION_I,
1491     TCC_OPTION_D,
1492     TCC_OPTION_U,
1493     TCC_OPTION_P,
1494     TCC_OPTION_L,
1495     TCC_OPTION_B,
1496     TCC_OPTION_l,
1497     TCC_OPTION_bench,
1498     TCC_OPTION_bt,
1499     TCC_OPTION_b,
1500     TCC_OPTION_g,
1501     TCC_OPTION_c,
1502     TCC_OPTION_dumpversion,
1503     TCC_OPTION_d,
1504     TCC_OPTION_float_abi,
1505     TCC_OPTION_static,
1506     TCC_OPTION_std,
1507     TCC_OPTION_shared,
1508     TCC_OPTION_soname,
1509     TCC_OPTION_o,
1510     TCC_OPTION_r,
1511     TCC_OPTION_s,
1512     TCC_OPTION_traditional,
1513     TCC_OPTION_Wl,
1514     TCC_OPTION_Wp,
1515     TCC_OPTION_W,
1516     TCC_OPTION_O,
1517     TCC_OPTION_mms_bitfields,
1518     TCC_OPTION_m,
1519     TCC_OPTION_f,
1520     TCC_OPTION_isystem,
1521     TCC_OPTION_iwithprefix,
1522     TCC_OPTION_include,
1523     TCC_OPTION_nostdinc,
1524     TCC_OPTION_nostdlib,
1525     TCC_OPTION_print_search_dirs,
1526     TCC_OPTION_rdynamic,
1527     TCC_OPTION_param,
1528     TCC_OPTION_pedantic,
1529     TCC_OPTION_pthread,
1530     TCC_OPTION_run,
1531     TCC_OPTION_v,
1532     TCC_OPTION_w,
1533     TCC_OPTION_pipe,
1534     TCC_OPTION_E,
1535     TCC_OPTION_MD,
1536     TCC_OPTION_MF,
1537     TCC_OPTION_x
1538 };
1539
1540 #define TCC_OPTION_HAS_ARG 0x0001
1541 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1542
1543 static const TCCOption tcc_options[] = {
1544     { "h", TCC_OPTION_HELP, 0 },
1545     { "-help", TCC_OPTION_HELP, 0 },
1546     { "?", TCC_OPTION_HELP, 0 },
1547     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1548     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1549     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1550     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1551     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1552     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1553     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1554     { "bench", TCC_OPTION_bench, 0 },
1555 #ifdef CONFIG_TCC_BACKTRACE
1556     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1557 #endif
1558 #ifdef CONFIG_TCC_BCHECK
1559     { "b", TCC_OPTION_b, 0 },
1560 #endif
1561     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1562     { "c", TCC_OPTION_c, 0 },
1563     { "dumpversion", TCC_OPTION_dumpversion, 0},
1564     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1565 #ifdef TCC_TARGET_ARM
1566     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1567 #endif
1568     { "static", TCC_OPTION_static, 0 },
1569     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1570     { "shared", TCC_OPTION_shared, 0 },
1571     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1572     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1573     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1574     { "pedantic", TCC_OPTION_pedantic, 0},
1575     { "pthread", TCC_OPTION_pthread, 0},
1576     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1577     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1578     { "r", TCC_OPTION_r, 0 },
1579     { "s", TCC_OPTION_s, 0 },
1580     { "traditional", TCC_OPTION_traditional, 0 },
1581     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1582     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1583     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1584     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1585     { "mms-bitfields", TCC_OPTION_mms_bitfields, 0}, /* must go before option 'm' */
1586     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1587     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1588     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1589     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
1590     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1591     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1592     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1593     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1594     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1595     { "w", TCC_OPTION_w, 0 },
1596     { "pipe", TCC_OPTION_pipe, 0},
1597     { "E", TCC_OPTION_E, 0},
1598     { "MD", TCC_OPTION_MD, 0},
1599     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1600     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1601     { NULL, 0, 0 },
1602 };
1603
1604 static void parse_option_D(TCCState *s1, const char *optarg)
1605 {
1606     char *sym = tcc_strdup(optarg);
1607     char *value = strchr(sym, '=');
1608     if (value)
1609         *value++ = '\0';
1610     tcc_define_symbol(s1, sym, value);
1611     tcc_free(sym);
1612 }
1613
1614 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1615 {
1616     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1617     f->type = filetype;
1618     strcpy(f->name, filename);
1619     dynarray_add((void ***)&s->files, &s->nb_files, f);
1620 }
1621
1622 /* read list file */
1623 static void args_parser_listfile(TCCState *s, const char *filename)
1624 {
1625     int fd;
1626     size_t len;
1627     char *p;
1628
1629     fd = open(filename, O_RDONLY | O_BINARY);
1630     if (fd < 0)
1631         tcc_error("file '%s' not found", filename);
1632
1633     len = lseek(fd, 0, SEEK_END);
1634     p = tcc_malloc(len + 1), p[len] = 0;
1635     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1636     tcc_set_options(s, p);
1637     tcc_free(p);
1638 }
1639
1640 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1641 {
1642     const TCCOption *popt;
1643     const char *optarg, *r;
1644     int optind = 0;
1645     int run = 0;
1646     int x;
1647     CString linker_arg; /* collect -Wl options */
1648     char buf[1024];
1649
1650     cstr_new(&linker_arg);
1651
1652     while (optind < argc) {
1653
1654         r = argv[optind++];
1655
1656 reparse:
1657         if (r[0] == '@' && r[1] != '\0') {
1658             args_parser_listfile(s, r + 1);
1659             continue;
1660         }
1661
1662         if (r[0] != '-' || r[1] == '\0') {
1663             args_parser_add_file(s, r, s->filetype);
1664             if (run) {
1665                 optind--;
1666                 /* argv[0] will be this file */
1667                 break;
1668             }
1669             continue;
1670         }
1671
1672         /* find option in table */
1673         for(popt = tcc_options; ; ++popt) {
1674             const char *p1 = popt->name;
1675             const char *r1 = r + 1;
1676             if (p1 == NULL)
1677                 tcc_error("invalid option -- '%s'", r);
1678             if (!strstart(p1, &r1))
1679                 continue;
1680             optarg = r1;
1681             if (popt->flags & TCC_OPTION_HAS_ARG) {
1682                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1683                     if (optind >= argc)
1684                 arg_err:
1685                         tcc_error("argument to '%s' is missing", r);
1686                     optarg = argv[optind++];
1687                 }
1688             } else if (*r1 != '\0')
1689                 continue;
1690             break;
1691         }
1692
1693         switch(popt->index) {
1694         case TCC_OPTION_HELP:
1695             return 0;
1696         case TCC_OPTION_I:
1697             tcc_add_include_path(s, optarg);
1698             break;
1699         case TCC_OPTION_D:
1700             parse_option_D(s, optarg);
1701             break;
1702         case TCC_OPTION_U:
1703             tcc_undefine_symbol(s, optarg);
1704             break;
1705         case TCC_OPTION_L:
1706             tcc_add_library_path(s, optarg);
1707             break;
1708         case TCC_OPTION_B:
1709             /* set tcc utilities path (mainly for tcc development) */
1710             tcc_set_lib_path(s, optarg);
1711             break;
1712         case TCC_OPTION_l:
1713             args_parser_add_file(s, optarg, AFF_TYPE_LIBWH - s->alacarte_link);
1714             s->nb_libraries++;
1715             break;
1716         case TCC_OPTION_pthread:
1717             parse_option_D(s, "_REENTRANT");
1718             s->option_pthread = 1;
1719             break;
1720         case TCC_OPTION_bench:
1721             s->do_bench = 1;
1722             break;
1723 #ifdef CONFIG_TCC_BACKTRACE
1724         case TCC_OPTION_bt:
1725             tcc_set_num_callers(atoi(optarg));
1726             break;
1727 #endif
1728 #ifdef CONFIG_TCC_BCHECK
1729         case TCC_OPTION_b:
1730             s->do_bounds_check = 1;
1731             s->do_debug = 1;
1732             break;
1733 #endif
1734         case TCC_OPTION_g:
1735             s->do_debug = 1;
1736             break;
1737         case TCC_OPTION_c:
1738             x = TCC_OUTPUT_OBJ;
1739         set_output_type:
1740             if (s->output_type)
1741                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1742             s->output_type = x;
1743             break;
1744         case TCC_OPTION_d:
1745             if (*optarg == 'D')
1746                 s->dflag = 3;
1747             else if (*optarg == 'M')
1748                 s->dflag = 7;
1749             else
1750                 goto unsupported_option;
1751             break;
1752 #ifdef TCC_TARGET_ARM
1753         case TCC_OPTION_float_abi:
1754             /* tcc doesn't support soft float yet */
1755             if (!strcmp(optarg, "softfp")) {
1756                 s->float_abi = ARM_SOFTFP_FLOAT;
1757                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1758             } else if (!strcmp(optarg, "hard"))
1759                 s->float_abi = ARM_HARD_FLOAT;
1760             else
1761                 tcc_error("unsupported float abi '%s'", optarg);
1762             break;
1763 #endif
1764         case TCC_OPTION_static:
1765             s->static_link = 1;
1766             break;
1767         case TCC_OPTION_std:
1768             /* silently ignore, a current purpose:
1769                allow to use a tcc as a reference compiler for "make test" */
1770             break;
1771         case TCC_OPTION_shared:
1772             x = TCC_OUTPUT_DLL;
1773             goto set_output_type;
1774         case TCC_OPTION_soname:
1775             s->soname = tcc_strdup(optarg);
1776             break;
1777         case TCC_OPTION_m:
1778             if (strcmp(optarg, "32") && strcmp(optarg, "64"))
1779                 goto unsupported_option;
1780             s->option_m = tcc_strdup(optarg);
1781             break;
1782         case TCC_OPTION_o:
1783             if (s->outfile) {
1784                 tcc_warning("multiple -o option");
1785                 tcc_free(s->outfile);
1786             }
1787             s->outfile = tcc_strdup(optarg);
1788             break;
1789         case TCC_OPTION_r:
1790             /* generate a .o merging several output files */
1791             s->option_r = 1;
1792             x = TCC_OUTPUT_OBJ;
1793             goto set_output_type;
1794         case TCC_OPTION_isystem:
1795             tcc_add_sysinclude_path(s, optarg);
1796             break;
1797         case TCC_OPTION_iwithprefix:
1798             snprintf(buf, sizeof buf, "{B}/%s", optarg);
1799             tcc_add_sysinclude_path(s, buf);
1800             break;
1801         case TCC_OPTION_include:
1802             dynarray_add((void ***)&s->cmd_include_files,
1803                          &s->nb_cmd_include_files, tcc_strdup(optarg));
1804             break;
1805         case TCC_OPTION_nostdinc:
1806             s->nostdinc = 1;
1807             break;
1808         case TCC_OPTION_nostdlib:
1809             s->nostdlib = 1;
1810             break;
1811         case TCC_OPTION_print_search_dirs:
1812             s->print_search_dirs = 1;
1813             break;
1814         case TCC_OPTION_run:
1815 #ifndef TCC_IS_NATIVE
1816             tcc_error("-run is not available in a cross compiler");
1817 #endif
1818             tcc_set_options(s, optarg);
1819             run = 1;
1820             x = TCC_OUTPUT_MEMORY;
1821             goto set_output_type;
1822         case TCC_OPTION_v:
1823             do ++s->verbose; while (*optarg++ == 'v');
1824             break;
1825         case TCC_OPTION_f:
1826             if (tcc_set_flag(s, optarg, 1) < 0)
1827                 goto unsupported_option;
1828             break;
1829         case TCC_OPTION_W:
1830             if (tcc_set_warning(s, optarg, 1) < 0)
1831                 goto unsupported_option;
1832             break;
1833         case TCC_OPTION_w:
1834             s->warn_none = 1;
1835             break;
1836         case TCC_OPTION_rdynamic:
1837             s->rdynamic = 1;
1838             break;
1839         case TCC_OPTION_Wl:
1840             if (linker_arg.size)
1841                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1842             cstr_cat(&linker_arg, optarg, 0);
1843             if (tcc_set_linker(s, linker_arg.data))
1844                 cstr_free(&linker_arg);
1845             break;
1846         case TCC_OPTION_Wp:
1847             r = optarg;
1848             goto reparse;
1849         case TCC_OPTION_E:
1850             x = TCC_OUTPUT_PREPROCESS;
1851             goto set_output_type;
1852         case TCC_OPTION_P:
1853             s->Pflag = atoi(optarg) + 1;
1854             break;
1855         case TCC_OPTION_MD:
1856             s->gen_deps = 1;
1857             break;
1858         case TCC_OPTION_MF:
1859             s->deps_outfile = tcc_strdup(optarg);
1860             break;
1861         case TCC_OPTION_dumpversion:
1862             printf ("%s\n", TCC_VERSION);
1863             exit(0);
1864             break;
1865         case TCC_OPTION_x:
1866             if (*optarg == 'c')
1867                 s->filetype = AFF_TYPE_C;
1868             else if (*optarg == 'a')
1869                 s->filetype = AFF_TYPE_ASMPP;
1870             else if (*optarg == 'n')
1871                 s->filetype = AFF_TYPE_NONE;
1872             else
1873                 tcc_warning("unsupported language '%s'", optarg);
1874             break;
1875         case TCC_OPTION_O:
1876             x = atoi(optarg);
1877             if (x > 0)
1878                 tcc_define_symbol(s, "__OPTIMIZE__", NULL);
1879             break;
1880         case TCC_OPTION_mms_bitfields:
1881             s->ms_bitfields = 1;
1882             break;
1883         case TCC_OPTION_traditional:
1884         case TCC_OPTION_pedantic:
1885         case TCC_OPTION_pipe:
1886         case TCC_OPTION_s:
1887             /* ignored */
1888             break;
1889         default:
1890 unsupported_option:
1891             if (s->warn_unsupported)
1892                 tcc_warning("unsupported option '%s'", r);
1893             break;
1894         }
1895     }
1896
1897     if (linker_arg.size) {
1898         r = linker_arg.data;
1899         goto arg_err;
1900     }
1901
1902     return optind;
1903 }
1904
1905 LIBTCCAPI int tcc_set_options(TCCState *s, const char *r)
1906 {
1907     char **argv;
1908     int argc;
1909     int ret, q, c;
1910     CString str;
1911
1912     argc = 0, argv = NULL;
1913     for(;;) {
1914         while (c = (unsigned char)*r, c && c <= ' ')
1915             ++r;
1916         if (c == 0)
1917             break;
1918         q = 0;
1919         cstr_new(&str);
1920         while (c = (unsigned char)*r, c) {
1921             ++r;
1922             if (c == '\\' && (*r == '"' || *r == '\\')) {
1923                 c = *r++;
1924             } else if (c == '"') {
1925                 q = !q;
1926                 continue;
1927             } else if (q == 0 && c <= ' ') {
1928                 break;
1929             }
1930             cstr_ccat(&str, c);
1931         }
1932         cstr_ccat(&str, 0);
1933         //printf("<%s>\n", str.data), fflush(stdout);
1934         dynarray_add((void ***)&argv, &argc, tcc_strdup(str.data));
1935         cstr_free(&str);
1936     }
1937     ret = tcc_parse_args(s, argc, argv);
1938     dynarray_reset(&argv, &argc);
1939     return ret;
1940 }
1941
1942 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time)
1943 {
1944     if (total_time < 1)
1945         total_time = 1;
1946     if (total_bytes < 1)
1947         total_bytes = 1;
1948     fprintf(stderr, "%d idents, %d lines, %d bytes, %0.3f s, %u lines/s, %0.1f MB/s\n",
1949            tok_ident - TOK_IDENT, total_lines, total_bytes,
1950            (double)total_time/1000,
1951            (unsigned)total_lines*1000/total_time,
1952            (double)total_bytes/1000/total_time);
1953 }
1954
1955 PUB_FUNC void tcc_set_environment(TCCState *s)
1956 {
1957     char * path;
1958
1959     path = getenv("C_INCLUDE_PATH");
1960     if(path != NULL) {
1961         tcc_add_include_path(s, path);
1962     }
1963     path = getenv("CPATH");
1964     if(path != NULL) {
1965         tcc_add_include_path(s, path);
1966     }
1967     path = getenv("LIBRARY_PATH");
1968     if(path != NULL) {
1969         tcc_add_library_path(s, path);
1970     }
1971 }