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 #endif
  45 #ifdef TCC_TARGET_ARM
  46 #include "arm-gen.c"
  47 #endif
  48 #ifdef TCC_TARGET_C67
  49 #include "c67-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_X86_64
  52 #include "x86_64-gen.c"
  53 #endif
  54 #ifdef CONFIG_TCC_ASM
  55 #include "tccasm.c"
  56 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  57 #include "i386-asm.c"
  58 #endif
  59 #endif
  60 #ifdef TCC_TARGET_COFF
  61 #include "tcccoff.c"
  62 #endif
  63 #ifdef TCC_TARGET_PE
  64 #include "tccpe.c"
  65 #endif
  66 #endif /* ONE_SOURCE */
  67
  68 /********************************************************/
  69 #ifndef CONFIG_TCC_ASM
  70 ST_FUNC void asm_instr(void)
  71 {
  72     tcc_error("inline asm() not supported");
  73 }
  74 ST_FUNC void asm_global_instr(void)
  75 {
  76     tcc_error("inline asm() not supported");
  77 }
  78 #endif
  79
  80 /********************************************************/
  81 #ifdef _WIN32
  82 static char *normalize_slashes(char *path)
  83 {
  84     char *p;
  85     for (p = path; *p; ++p)
  86         if (*p == '\\')
  87             *p = '/';
  88     return path;
  89 }
  90
  91 static HMODULE tcc_module;
  92
  93 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  94 static void tcc_set_lib_path_w32(TCCState *s)
  95 {
  96     char path[1024], *p;
  97     GetModuleFileNameA(tcc_module, path, sizeof path);
  98     p = tcc_basename(normalize_slashes(strlwr(path)));
  99     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 100         p -= 5;
 101     else if (p > path)
 102         p--;
 103     *p = 0;
 104     tcc_set_lib_path(s, path);
 105 }
 106
 107 #ifdef TCC_TARGET_PE
 108 static void tcc_add_systemdir(TCCState *s)
 109 {
 110     char buf[1000];
 111     GetSystemDirectory(buf, sizeof buf);
 112     tcc_add_library_path(s, normalize_slashes(buf));
 113 }
 114 #endif
 115
 116 #ifndef CONFIG_TCC_STATIC
 117 void dlclose(void *p)
 118 {
 119     FreeLibrary((HMODULE)p);
 120 }
 121 #endif
 122
 123 #ifdef LIBTCC_AS_DLL
 124 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 125 {
 126     if (DLL_PROCESS_ATTACH == dwReason)
 127         tcc_module = hDll;
 128     return TRUE;
 129 }
 130 #endif
 131 #endif
 132
 133 /********************************************************/
 134 /* copy a string and truncate it. */
 135 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 136 {
 137     char *q, *q_end;
 138     int c;
 139
 140     if (buf_size > 0) {
 141         q = buf;
 142         q_end = buf + buf_size - 1;
 143         while (q < q_end) {
 144             c = *s++;
 145             if (c == '\0')
 146                 break;
 147             *q++ = c;
 148         }
 149         *q = '\0';
 150     }
 151     return buf;
 152 }
 153
 154 /* strcat and truncate. */
 155 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 156 {
 157     int len;
 158     len = strlen(buf);
 159     if (len < buf_size)
 160         pstrcpy(buf + len, buf_size - len, s);
 161     return buf;
 162 }
 163
 164 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 165 {
 166     memcpy(out, in, num);
 167     out[num] = '\0';
 168     return out;
 169 }
 170
 171 /* extract the basename of a file */
 172 PUB_FUNC char *tcc_basename(const char *name)
 173 {
 174     char *p = strchr(name, 0);
 175     while (p > name && !IS_DIRSEP(p[-1]))
 176         --p;
 177     return p;
 178 }
 179
 180 /* extract extension part of a file
 181  *
 182  * (if no extension, return pointer to end-of-string)
 183  */
 184 PUB_FUNC char *tcc_fileextension (const char *name)
 185 {
 186     char *b = tcc_basename(name);
 187     char *e = strrchr(b, '.');
 188     return e ? e : strchr(b, 0);
 189 }
 190
 191 /********************************************************/
 192 /* memory management */
 193
 194 #undef free
 195 #undef malloc
 196 #undef realloc
 197
 198 #ifdef MEM_DEBUG
 199 ST_DATA int mem_cur_size;
 200 ST_DATA int mem_max_size;
 201 unsigned malloc_usable_size(void*);
 202 #endif
 203
 204 PUB_FUNC void tcc_free(void *ptr)
 205 {
 206 #ifdef MEM_DEBUG
 207     mem_cur_size -= malloc_usable_size(ptr);
 208 #endif
 209     free(ptr);
 210 }
 211
 212 PUB_FUNC void *tcc_malloc(unsigned long size)
 213 {
 214     void *ptr;
 215     ptr = malloc(size);
 216     if (!ptr && size)
 217         tcc_error("memory full (malloc)");
 218 #ifdef MEM_DEBUG
 219     mem_cur_size += malloc_usable_size(ptr);
 220     if (mem_cur_size > mem_max_size)
 221         mem_max_size = mem_cur_size;
 222 #endif
 223     return ptr;
 224 }
 225
 226 PUB_FUNC void *tcc_mallocz(unsigned long size)
 227 {
 228     void *ptr;
 229     ptr = tcc_malloc(size);
 230     memset(ptr, 0, size);
 231     return ptr;
 232 }
 233
 234 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 235 {
 236     void *ptr1;
 237 #ifdef MEM_DEBUG
 238     mem_cur_size -= malloc_usable_size(ptr);
 239 #endif
 240     ptr1 = realloc(ptr, size);
 241     if (!ptr1 && size)
 242         tcc_error("memory full (realloc)");
 243 #ifdef MEM_DEBUG
 244     /* NOTE: count not correct if alloc error, but not critical */
 245     mem_cur_size += malloc_usable_size(ptr1);
 246     if (mem_cur_size > mem_max_size)
 247         mem_max_size = mem_cur_size;
 248 #endif
 249     return ptr1;
 250 }
 251
 252 PUB_FUNC char *tcc_strdup(const char *str)
 253 {
 254     char *ptr;
 255     ptr = tcc_malloc(strlen(str) + 1);
 256     strcpy(ptr, str);
 257     return ptr;
 258 }
 259
 260 PUB_FUNC void tcc_memstats(void)
 261 {
 262 #ifdef MEM_DEBUG
 263     printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 264 #endif
 265 }
 266
 267 #define free(p) use_tcc_free(p)
 268 #define malloc(s) use_tcc_malloc(s)
 269 #define realloc(p, s) use_tcc_realloc(p, s)
 270
 271 /********************************************************/
 272 /* dynarrays */
 273
 274 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 275 {
 276     int nb, nb_alloc;
 277     void **pp;
 278
 279     nb = *nb_ptr;
 280     pp = *ptab;
 281     /* every power of two we double array size */
 282     if ((nb & (nb - 1)) == 0) {
 283         if (!nb)
 284             nb_alloc = 1;
 285         else
 286             nb_alloc = nb * 2;
 287         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 288         *ptab = pp;
 289     }
 290     pp[nb++] = data;
 291     *nb_ptr = nb;
 292 }
 293
 294 ST_FUNC void dynarray_reset(void *pp, int *n)
 295 {
 296     void **p;
 297     for (p = *(void***)pp; *n; ++p, --*n)
 298         if (*p)
 299             tcc_free(*p);
 300     tcc_free(*(void**)pp);
 301     *(void**)pp = NULL;
 302 }
 303
 304 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 305 {
 306     const char *p;
 307     do {
 308         int c;
 309         CString str;
 310
 311         cstr_new(&str);
 312         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 313             if (c == '{' && p[1] && p[2] == '}') {
 314                 c = p[1], p += 2;
 315                 if (c == 'B')
 316                     cstr_cat(&str, s->tcc_lib_path);
 317             } else {
 318                 cstr_ccat(&str, c);
 319             }
 320         }
 321         cstr_ccat(&str, '\0');
 322         dynarray_add(p_ary, p_nb_ary, str.data);
 323         in = p+1;
 324     } while (*p);
 325 }
 326
 327 /********************************************************/
 328
 329 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 330 {
 331     Section *sec;
 332
 333     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 334     strcpy(sec->name, name);
 335     sec->sh_type = sh_type;
 336     sec->sh_flags = sh_flags;
 337     switch(sh_type) {
 338     case SHT_HASH:
 339     case SHT_REL:
 340     case SHT_RELA:
 341     case SHT_DYNSYM:
 342     case SHT_SYMTAB:
 343     case SHT_DYNAMIC:
 344         sec->sh_addralign = 4;
 345         break;
 346     case SHT_STRTAB:
 347         sec->sh_addralign = 1;
 348         break;
 349     default:
 350         sec->sh_addralign = 32; /* default conservative alignment */
 351         break;
 352     }
 353
 354     if (sh_flags & SHF_PRIVATE) {
 355         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 356     } else {
 357         sec->sh_num = s1->nb_sections;
 358         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 359     }
 360
 361     return sec;
 362 }
 363
 364 static void free_section(Section *s)
 365 {
 366     tcc_free(s->data);
 367 }
 368
 369 /* realloc section and set its content to zero */
 370 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 371 {
 372     unsigned long size;
 373     unsigned char *data;
 374
 375     size = sec->data_allocated;
 376     if (size == 0)
 377         size = 1;
 378     while (size < new_size)
 379         size = size * 2;
 380     data = tcc_realloc(sec->data, size);
 381     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 382     sec->data = data;
 383     sec->data_allocated = size;
 384 }
 385
 386 /* reserve at least 'size' bytes in section 'sec' from
 387    sec->data_offset. */
 388 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 389 {
 390     unsigned long offset, offset1;
 391
 392     offset = sec->data_offset;
 393     offset1 = offset + size;
 394     if (offset1 > sec->data_allocated)
 395         section_realloc(sec, offset1);
 396     sec->data_offset = offset1;
 397     return sec->data + offset;
 398 }
 399
 400 /* reserve at least 'size' bytes from section start */
 401 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 402 {
 403     if (size > sec->data_allocated)
 404         section_realloc(sec, size);
 405     if (size > sec->data_offset)
 406         sec->data_offset = size;
 407 }
 408
 409 /* return a reference to a section, and create it if it does not
 410    exists */
 411 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 412 {
 413     Section *sec;
 414     int i;
 415     for(i = 1; i < s1->nb_sections; i++) {
 416         sec = s1->sections[i];
 417         if (!strcmp(name, sec->name))
 418             return sec;
 419     }
 420     /* sections are created as PROGBITS */
 421     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 422 }
 423
 424 /* update sym->c so that it points to an external symbol in section
 425    'section' with value 'value' */
 426 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 427                             addr_t value, unsigned long size,
 428                             int can_add_underscore)
 429 {
 430     int sym_type, sym_bind, sh_num, info, other;
 431     ElfW(Sym) *esym;
 432     const char *name;
 433     char buf1[256];
 434
 435     if (section == NULL)
 436         sh_num = SHN_UNDEF;
 437     else if (section == SECTION_ABS)
 438         sh_num = SHN_ABS;
 439     else
 440         sh_num = section->sh_num;
 441
 442     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 443         sym_type = STT_FUNC;
 444     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 445         sym_type = STT_NOTYPE;
 446     } else {
 447         sym_type = STT_OBJECT;
 448     }
 449
 450     if (sym->type.t & VT_STATIC)
 451         sym_bind = STB_LOCAL;
 452     else {
 453         if (sym->type.t & VT_WEAK)
 454             sym_bind = STB_WEAK;
 455         else
 456             sym_bind = STB_GLOBAL;
 457     }
 458
 459     if (!sym->c) {
 460         name = get_tok_str(sym->v, NULL);
 461 #ifdef CONFIG_TCC_BCHECK
 462         char buf[32];
 463         if (tcc_state->do_bounds_check) {
 464             /* XXX: avoid doing that for statics ? */
 465             /* if bound checking is activated, we change some function
 466                names by adding the "__bound" prefix */
 467             switch(sym->v) {
 468 #ifdef TCC_TARGET_PE
 469             /* XXX: we rely only on malloc hooks */
 470             case TOK_malloc:
 471             case TOK_free:
 472             case TOK_realloc:
 473             case TOK_memalign:
 474             case TOK_calloc:
 475 #endif
 476             case TOK_memcpy:
 477             case TOK_memmove:
 478             case TOK_memset:
 479             case TOK_strlen:
 480             case TOK_strcpy:
 481             case TOK_alloca:
 482                 strcpy(buf, "__bound_");
 483                 strcat(buf, name);
 484                 name = buf;
 485                 break;
 486             }
 487         }
 488 #endif
 489         other = 0;
 490
 491 #ifdef TCC_TARGET_PE
 492         if (sym->type.t & VT_EXPORT)
 493             other |= ST_PE_EXPORT;
 494         if (sym_type == STT_FUNC && sym->type.ref) {
 495             Sym *ref = sym->type.ref;
 496             if (ref->a.func_export)
 497                 other |= ST_PE_EXPORT;
 498             if (ref->a.func_call == FUNC_STDCALL && can_add_underscore) {
 499                 sprintf(buf1, "_%s@%d", name, ref->a.func_args * PTR_SIZE);
 500                 name = buf1;
 501                 other |= ST_PE_STDCALL;
 502                 can_add_underscore = 0;
 503             }
 504         } else {
 505             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 506                 other |= ST_PE_IMPORT;
 507             if (sym->type.t & VT_IMPORT)
 508                 other |= ST_PE_IMPORT;
 509         }
 510 #else
 511         if (! (sym->type.t & VT_STATIC))
 512             other = (sym->type.t & VT_VIS_MASK) >> VT_VIS_SHIFT;
 513 #endif
 514         if (tcc_state->leading_underscore && can_add_underscore) {
 515             buf1[0] = '_';
 516             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 517             name = buf1;
 518         }
 519         if (sym->asm_label) {
 520             name = sym->asm_label;
 521         }
 522         info = ELFW(ST_INFO)(sym_bind, sym_type);
 523         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 524     } else {
 525         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 526         esym->st_value = value;
 527         esym->st_size = size;
 528         esym->st_shndx = sh_num;
 529     }
 530 }
 531
 532 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 533                            addr_t value, unsigned long size)
 534 {
 535     put_extern_sym2(sym, section, value, size, 1);
 536 }
 537
 538 /* add a new relocation entry to symbol 'sym' in section 's' */
 539 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 540 {
 541     int c = 0;
 542     if (sym) {
 543         if (0 == sym->c)
 544             put_extern_sym(sym, NULL, 0, 0);
 545         c = sym->c;
 546     }
 547     /* now we can add ELF relocation info */
 548     put_elf_reloc(symtab_section, s, offset, type, c);
 549 }
 550
 551 /********************************************************/
 552
 553 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 554 {
 555     int len;
 556     len = strlen(buf);
 557     vsnprintf(buf + len, buf_size - len, fmt, ap);
 558 }
 559
 560 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 561 {
 562     va_list ap;
 563     va_start(ap, fmt);
 564     strcat_vprintf(buf, buf_size, fmt, ap);
 565     va_end(ap);
 566 }
 567
 568 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 569 {
 570     char buf[2048];
 571     BufferedFile **pf, *f;
 572
 573     buf[0] = '\0';
 574     /* use upper file if inline ":asm:" or token ":paste:" */
 575     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 576      ;
 577     if (f) {
 578         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 579             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 580                 (*pf)->filename, (*pf)->line_num);
 581         if (f->line_num > 0) {
 582             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 583                 f->filename, f->line_num);
 584         } else {
 585             strcat_printf(buf, sizeof(buf), "%s: ",
 586                 f->filename);
 587         }
 588     } else {
 589         strcat_printf(buf, sizeof(buf), "tcc: ");
 590     }
 591     if (is_warning)
 592         strcat_printf(buf, sizeof(buf), "warning: ");
 593     else
 594         strcat_printf(buf, sizeof(buf), "error: ");
 595     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 596
 597     if (!s1->error_func) {
 598         /* default case: stderr */
 599         fprintf(stderr, "%s\n", buf);
 600     } else {
 601         s1->error_func(s1->error_opaque, buf);
 602     }
 603     if (!is_warning || s1->warn_error)
 604         s1->nb_errors++;
 605 }
 606
 607 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 608                         void (*error_func)(void *opaque, const char *msg))
 609 {
 610     s->error_opaque = error_opaque;
 611     s->error_func = error_func;
 612 }
 613
 614 /* error without aborting current compilation */
 615 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 616 {
 617     TCCState *s1 = tcc_state;
 618     va_list ap;
 619
 620     va_start(ap, fmt);
 621     error1(s1, 0, fmt, ap);
 622     va_end(ap);
 623 }
 624
 625 PUB_FUNC void tcc_error(const char *fmt, ...)
 626 {
 627     TCCState *s1 = tcc_state;
 628     va_list ap;
 629
 630     va_start(ap, fmt);
 631     error1(s1, 0, fmt, ap);
 632     va_end(ap);
 633     /* better than nothing: in some cases, we accept to handle errors */
 634     if (s1->error_set_jmp_enabled) {
 635         longjmp(s1->error_jmp_buf, 1);
 636     } else {
 637         /* XXX: eliminate this someday */
 638         exit(1);
 639     }
 640 }
 641
 642 PUB_FUNC void tcc_warning(const char *fmt, ...)
 643 {
 644     TCCState *s1 = tcc_state;
 645     va_list ap;
 646
 647     if (s1->warn_none)
 648         return;
 649
 650     va_start(ap, fmt);
 651     error1(s1, 1, fmt, ap);
 652     va_end(ap);
 653 }
 654
 655 /********************************************************/
 656 /* I/O layer */
 657
 658 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 659 {
 660     BufferedFile *bf;
 661     int buflen = initlen ? initlen : IO_BUF_SIZE;
 662
 663     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 664     bf->buf_ptr = bf->buffer;
 665     bf->buf_end = bf->buffer + initlen;
 666     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 667     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 668 #ifdef _WIN32
 669     normalize_slashes(bf->filename);
 670 #endif
 671     bf->line_num = 1;
 672     bf->ifndef_macro = 0;
 673     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 674     bf->fd = -1;
 675     bf->prev = file;
 676     file = bf;
 677 }
 678
 679 ST_FUNC void tcc_close(void)
 680 {
 681     BufferedFile *bf = file;
 682     if (bf->fd > 0) {
 683         close(bf->fd);
 684         total_lines += bf->line_num;
 685     }
 686     file = bf->prev;
 687     tcc_free(bf);
 688 }
 689
 690 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 691 {
 692     int fd;
 693     if (strcmp(filename, "-") == 0)
 694         fd = 0, filename = "stdin";
 695     else
 696         fd = open(filename, O_RDONLY | O_BINARY);
 697     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 698         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 699                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 700     if (fd < 0)
 701         return -1;
 702
 703     tcc_open_bf(s1, filename, 0);
 704     file->fd = fd;
 705     return fd;
 706 }
 707
 708 /* compile the C file opened in 'file'. Return non zero if errors. */
 709 static int tcc_compile(TCCState *s1)
 710 {
 711     Sym *define_start;
 712     SValue *pvtop;
 713     char buf[512];
 714     volatile int section_sym;
 715
 716 #ifdef INC_DEBUG
 717     printf("%s: **** new file\n", file->filename);
 718 #endif
 719     preprocess_init(s1);
 720
 721     cur_text_section = NULL;
 722     funcname = "";
 723     anon_sym = SYM_FIRST_ANOM;
 724
 725     /* file info: full path + filename */
 726     section_sym = 0; /* avoid warning */
 727     if (s1->do_debug) {
 728         section_sym = put_elf_sym(symtab_section, 0, 0,
 729                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 730                                   text_section->sh_num, NULL);
 731         getcwd(buf, sizeof(buf));
 732 #ifdef _WIN32
 733         normalize_slashes(buf);
 734 #endif
 735         pstrcat(buf, sizeof(buf), "/");
 736         put_stabs_r(buf, N_SO, 0, 0,
 737                     text_section->data_offset, text_section, section_sym);
 738         put_stabs_r(file->filename, N_SO, 0, 0,
 739                     text_section->data_offset, text_section, section_sym);
 740     }
 741     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 742        symbols can be safely used */
 743     put_elf_sym(symtab_section, 0, 0,
 744                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 745                 SHN_ABS, file->filename);
 746
 747     /* define some often used types */
 748     int_type.t = VT_INT;
 749
 750     char_pointer_type.t = VT_BYTE;
 751     mk_pointer(&char_pointer_type);
 752
 753 #if PTR_SIZE == 4
 754     size_type.t = VT_INT;
 755 #else
 756     size_type.t = VT_LLONG;
 757 #endif
 758
 759     func_old_type.t = VT_FUNC;
 760     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 761 #ifdef TCC_TARGET_ARM
 762     arm_init(s1);
 763 #endif
 764
 765 #if 0
 766     /* define 'void *alloca(unsigned int)' builtin function */
 767     {
 768         Sym *s1;
 769
 770         p = anon_sym++;
 771         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 772         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 773         s1->next = NULL;
 774         sym->next = s1;
 775         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 776     }
 777 #endif
 778
 779     define_start = define_stack;
 780
 781     if (setjmp(s1->error_jmp_buf) == 0) {
 782         s1->nb_errors = 0;
 783         s1->error_set_jmp_enabled = 1;
 784
 785         ch = file->buf_ptr[0];
 786         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 787         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 788         pvtop = vtop;
 789         next();
 790         decl(VT_CONST);
 791         if (tok != TOK_EOF)
 792             expect("declaration");
 793         if (pvtop != vtop)
 794             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 795
 796         /* end of translation unit info */
 797         if (s1->do_debug) {
 798             put_stabs_r(NULL, N_SO, 0, 0,
 799                         text_section->data_offset, text_section, section_sym);
 800         }
 801     }
 802
 803     s1->error_set_jmp_enabled = 0;
 804
 805     /* reset define stack, but leave -Dsymbols (may be incorrect if
 806        they are undefined) */
 807     free_defines(define_start);
 808
 809     gen_inline_functions();
 810
 811     sym_pop(&global_stack, NULL);
 812     sym_pop(&local_stack, NULL);
 813
 814     return s1->nb_errors != 0 ? -1 : 0;
 815 }
 816
 817 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 818 {
 819     int len, ret;
 820     len = strlen(str);
 821
 822     tcc_open_bf(s, "<string>", len);
 823     memcpy(file->buffer, str, len);
 824     ret = tcc_compile(s);
 825     tcc_close();
 826     return ret;
 827 }
 828
 829 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 830 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 831 {
 832     int len1, len2;
 833     /* default value */
 834     if (!value)
 835         value = "1";
 836     len1 = strlen(sym);
 837     len2 = strlen(value);
 838
 839     /* init file structure */
 840     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 841     memcpy(file->buffer, sym, len1);
 842     file->buffer[len1] = ' ';
 843     memcpy(file->buffer + len1 + 1, value, len2);
 844
 845     /* parse with define parser */
 846     ch = file->buf_ptr[0];
 847     next_nomacro();
 848     parse_define();
 849
 850     tcc_close();
 851 }
 852
 853 /* undefine a preprocessor symbol */
 854 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 855 {
 856     TokenSym *ts;
 857     Sym *s;
 858     ts = tok_alloc(sym, strlen(sym));
 859     s = define_find(ts->tok);
 860     /* undefine symbol by putting an invalid name */
 861     if (s)
 862         define_undef(s);
 863 }
 864
 865 /* cleanup all static data used during compilation */
 866 static void tcc_cleanup(void)
 867 {
 868     int i, n;
 869     if (NULL == tcc_state)
 870         return;
 871     tcc_state = NULL;
 872
 873     /* free -D defines */
 874     free_defines(NULL);
 875
 876     /* free tokens */
 877     n = tok_ident - TOK_IDENT;
 878     for(i = 0; i < n; i++)
 879         tcc_free(table_ident[i]);
 880     tcc_free(table_ident);
 881
 882     /* free sym_pools */
 883     dynarray_reset(&sym_pools, &nb_sym_pools);
 884     /* string buffer */
 885     cstr_free(&tokcstr);
 886     /* reset symbol stack */
 887     sym_free_first = NULL;
 888     /* cleanup from error/setjmp */
 889     macro_ptr = NULL;
 890 }
 891
 892 LIBTCCAPI TCCState *tcc_new(void)
 893 {
 894     TCCState *s;
 895     char buffer[100];
 896     int a,b,c;
 897
 898     tcc_cleanup();
 899
 900     s = tcc_mallocz(sizeof(TCCState));
 901     if (!s)
 902         return NULL;
 903     tcc_state = s;
 904 #ifdef _WIN32
 905     tcc_set_lib_path_w32(s);
 906 #else
 907     tcc_set_lib_path(s, CONFIG_TCCDIR);
 908 #endif
 909     s->output_type = 0;
 910     preprocess_new();
 911     s->include_stack_ptr = s->include_stack;
 912
 913     /* we add dummy defines for some special macros to speed up tests
 914        and to have working defined() */
 915     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 916     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 917     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 918     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 919
 920     /* define __TINYC__ 92X  */
 921     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 922     sprintf(buffer, "%d", a*10000 + b*100 + c);
 923     tcc_define_symbol(s, "__TINYC__", buffer);
 924
 925     /* standard defines */
 926     tcc_define_symbol(s, "__STDC__", NULL);
 927     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 928     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 929
 930     /* target defines */
 931 #if defined(TCC_TARGET_I386)
 932     tcc_define_symbol(s, "__i386__", NULL);
 933     tcc_define_symbol(s, "__i386", NULL);
 934     tcc_define_symbol(s, "i386", NULL);
 935 #elif defined(TCC_TARGET_X86_64)
 936     tcc_define_symbol(s, "__x86_64__", NULL);
 937 #elif defined(TCC_TARGET_ARM)
 938     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 939     tcc_define_symbol(s, "__arm_elf__", NULL);
 940     tcc_define_symbol(s, "__arm_elf", NULL);
 941     tcc_define_symbol(s, "arm_elf", NULL);
 942     tcc_define_symbol(s, "__arm__", NULL);
 943     tcc_define_symbol(s, "__arm", NULL);
 944     tcc_define_symbol(s, "arm", NULL);
 945     tcc_define_symbol(s, "__APCS_32__", NULL);
 946     tcc_define_symbol(s, "__ARMEL__", NULL);
 947 #if defined(TCC_ARM_EABI)
 948     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 949 #endif
 950 #if defined(TCC_ARM_HARDFLOAT)
 951     s->float_abi = ARM_HARD_FLOAT;
 952     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 953 #else
 954     s->float_abi = ARM_SOFTFP_FLOAT;
 955 #endif
 956 #endif
 957
 958 #ifdef TCC_TARGET_PE
 959     tcc_define_symbol(s, "_WIN32", NULL);
 960 # ifdef TCC_TARGET_X86_64
 961     tcc_define_symbol(s, "_WIN64", NULL);
 962 # endif
 963 #else
 964     tcc_define_symbol(s, "__unix__", NULL);
 965     tcc_define_symbol(s, "__unix", NULL);
 966     tcc_define_symbol(s, "unix", NULL);
 967 # if defined(__linux)
 968     tcc_define_symbol(s, "__linux__", NULL);
 969     tcc_define_symbol(s, "__linux", NULL);
 970 # endif
 971 # if defined(__FreeBSD__)
 972 #  define str(s) #s
 973     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 974 #  undef str
 975 # endif
 976 # if defined(__FreeBSD_kernel__)
 977     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 978 # endif
 979 #endif
 980
 981     /* TinyCC & gcc defines */
 982 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 983     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 984     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 985 #else
 986     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 987     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 988 #endif
 989
 990 #ifdef TCC_TARGET_PE
 991     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 992     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 993 #else
 994     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 995     /* wint_t is unsigned int by default, but (signed) int on BSDs
 996        and unsigned short on windows.  Other OSes might have still
 997        other conventions, sigh.  */
 998 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
 999     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1000 #else
1001     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1002 #endif
1003 #endif
1004
1005 #ifndef TCC_TARGET_PE
1006     /* glibc defines */
1007     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1008     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1009     /* paths for crt objects */
1010     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1011 #endif
1012
1013     /* no section zero */
1014     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1015
1016     /* create standard sections */
1017     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1018     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1019     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1020
1021     /* symbols are always generated for linking stage */
1022     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1023                                 ".strtab",
1024                                 ".hashtab", SHF_PRIVATE);
1025     strtab_section = symtab_section->link;
1026     s->symtab = symtab_section;
1027
1028     /* private symbol table for dynamic symbols */
1029     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1030                                       ".dynstrtab",
1031                                       ".dynhashtab", SHF_PRIVATE);
1032     s->alacarte_link = 1;
1033     s->nocommon = 1;
1034
1035 #ifdef CHAR_IS_UNSIGNED
1036     s->char_is_unsigned = 1;
1037 #endif
1038     /* enable this if you want symbols with leading underscore on windows: */
1039 #if 0 /* def TCC_TARGET_PE */
1040     s->leading_underscore = 1;
1041 #endif
1042 #ifdef TCC_TARGET_I386
1043     s->seg_size = 32;
1044 #endif
1045 #ifdef TCC_IS_NATIVE
1046     s->runtime_main = "main";
1047 #endif
1048     return s;
1049 }
1050
1051 LIBTCCAPI void tcc_delete(TCCState *s1)
1052 {
1053     int i;
1054
1055     tcc_cleanup();
1056
1057     /* free all sections */
1058     for(i = 1; i < s1->nb_sections; i++)
1059         free_section(s1->sections[i]);
1060     dynarray_reset(&s1->sections, &s1->nb_sections);
1061
1062     for(i = 0; i < s1->nb_priv_sections; i++)
1063         free_section(s1->priv_sections[i]);
1064     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1065
1066     /* free any loaded DLLs */
1067 #ifdef TCC_IS_NATIVE
1068     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1069         DLLReference *ref = s1->loaded_dlls[i];
1070         if ( ref->handle )
1071             dlclose(ref->handle);
1072     }
1073 #endif
1074
1075     /* free loaded dlls array */
1076     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1077
1078     /* free library paths */
1079     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1080     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1081
1082     /* free include paths */
1083     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1084     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1085     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1086
1087     tcc_free(s1->tcc_lib_path);
1088     tcc_free(s1->soname);
1089     tcc_free(s1->rpath);
1090     tcc_free(s1->init_symbol);
1091     tcc_free(s1->fini_symbol);
1092     tcc_free(s1->outfile);
1093     tcc_free(s1->deps_outfile);
1094     dynarray_reset(&s1->files, &s1->nb_files);
1095     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1096
1097 #ifdef TCC_IS_NATIVE
1098 # ifdef HAVE_SELINUX
1099     munmap (s1->write_mem, s1->mem_size);
1100     munmap (s1->runtime_mem, s1->mem_size);
1101 # else
1102     tcc_free(s1->runtime_mem);
1103 # endif
1104 #endif
1105
1106     if(s1->sym_attrs) tcc_free(s1->sym_attrs);
1107
1108     tcc_free(s1);
1109 }
1110
1111 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1112 {
1113     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1114     return 0;
1115 }
1116
1117 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1118 {
1119     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1120     return 0;
1121 }
1122
1123 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1124 {
1125     const char *ext;
1126     ElfW(Ehdr) ehdr;
1127     int fd, ret, size;
1128
1129     /* find source file type with extension */
1130     ext = tcc_fileextension(filename);
1131     if (ext[0])
1132         ext++;
1133
1134 #ifdef CONFIG_TCC_ASM
1135     /* if .S file, define __ASSEMBLER__ like gcc does */
1136     if (!strcmp(ext, "S"))
1137         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1138 #endif
1139
1140     /* open the file */
1141     ret = tcc_open(s1, filename);
1142     if (ret < 0) {
1143         if (flags & AFF_PRINT_ERROR)
1144             tcc_error_noabort("file '%s' not found", filename);
1145         return ret;
1146     }
1147
1148     /* update target deps */
1149     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1150             tcc_strdup(filename));
1151
1152     if (flags & AFF_PREPROCESS) {
1153         ret = tcc_preprocess(s1);
1154         goto the_end;
1155     }
1156
1157     if (!ext[0] || !PATHCMP(ext, "c") || !PATHCMP(ext, "i")) {
1158         /* C file assumed */
1159         ret = tcc_compile(s1);
1160         goto the_end;
1161     }
1162
1163 #ifdef CONFIG_TCC_ASM
1164     if (!strcmp(ext, "S")) {
1165         /* preprocessed assembler */
1166         ret = tcc_assemble(s1, 1);
1167         goto the_end;
1168     }
1169
1170     if (!strcmp(ext, "s")) {
1171         /* non preprocessed assembler */
1172         ret = tcc_assemble(s1, 0);
1173         goto the_end;
1174     }
1175 #endif
1176
1177     fd = file->fd;
1178     /* assume executable format: auto guess file type */
1179     size = read(fd, &ehdr, sizeof(ehdr));
1180     lseek(fd, 0, SEEK_SET);
1181     if (size <= 0) {
1182         tcc_error_noabort("could not read header");
1183         goto the_end;
1184     }
1185
1186     if (size == sizeof(ehdr) &&
1187         ehdr.e_ident[0] == ELFMAG0 &&
1188         ehdr.e_ident[1] == ELFMAG1 &&
1189         ehdr.e_ident[2] == ELFMAG2 &&
1190         ehdr.e_ident[3] == ELFMAG3) {
1191
1192         /* do not display line number if error */
1193         file->line_num = 0;
1194         if (ehdr.e_type == ET_REL) {
1195             ret = tcc_load_object_file(s1, fd, 0);
1196             goto the_end;
1197
1198         }
1199 #ifndef TCC_TARGET_PE
1200         if (ehdr.e_type == ET_DYN) {
1201             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1202 #ifdef TCC_IS_NATIVE
1203                 void *h;
1204                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1205                 if (h)
1206 #endif
1207                     ret = 0;
1208             } else {
1209                 ret = tcc_load_dll(s1, fd, filename,
1210                                    (flags & AFF_REFERENCED_DLL) != 0);
1211             }
1212             goto the_end;
1213         }
1214 #endif
1215         tcc_error_noabort("unrecognized ELF file");
1216         goto the_end;
1217     }
1218
1219     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1220         file->line_num = 0; /* do not display line number if error */
1221         ret = tcc_load_archive(s1, fd);
1222         goto the_end;
1223     }
1224
1225 #ifdef TCC_TARGET_COFF
1226     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1227         ret = tcc_load_coff(s1, fd);
1228         goto the_end;
1229     }
1230 #endif
1231
1232 #ifdef TCC_TARGET_PE
1233     ret = pe_load_file(s1, filename, fd);
1234 #else
1235     /* as GNU ld, consider it is an ld script if not recognized */
1236     ret = tcc_load_ldscript(s1);
1237 #endif
1238     if (ret < 0)
1239         tcc_error_noabort("unrecognized file type");
1240
1241 the_end:
1242     tcc_close();
1243     return ret;
1244 }
1245
1246 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1247 {
1248     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1249         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1250     else
1251         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1252 }
1253
1254 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1255 {
1256     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1257     return 0;
1258 }
1259
1260 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1261     const char *filename, int flags, char **paths, int nb_paths)
1262 {
1263     char buf[1024];
1264     int i;
1265
1266     for(i = 0; i < nb_paths; i++) {
1267         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1268         if (tcc_add_file_internal(s, buf, flags) == 0)
1269             return 0;
1270     }
1271     return -1;
1272 }
1273
1274 /* find and load a dll. Return non zero if not found */
1275 /* XXX: add '-rpath' option support ? */
1276 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1277 {
1278     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1279         s->library_paths, s->nb_library_paths);
1280 }
1281
1282 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1283 {
1284     if (-1 == tcc_add_library_internal(s, "%s/%s",
1285         filename, 0, s->crt_paths, s->nb_crt_paths))
1286         tcc_error_noabort("file '%s' not found", filename);
1287     return 0;
1288 }
1289
1290 /* the library name is the same as the argument of the '-l' option */
1291 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1292 {
1293 #ifdef TCC_TARGET_PE
1294     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1295     const char **pp = s->static_link ? libs + 4 : libs;
1296 #else
1297     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1298     const char **pp = s->static_link ? libs + 1 : libs;
1299 #endif
1300     while (*pp) {
1301         if (0 == tcc_add_library_internal(s, *pp,
1302             libraryname, 0, s->library_paths, s->nb_library_paths))
1303             return 0;
1304         ++pp;
1305     }
1306     return -1;
1307 }
1308
1309 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1310 {
1311 #ifdef TCC_TARGET_PE
1312     /* On x86_64 'val' might not be reachable with a 32bit offset.
1313        So it is handled here as if it were in a DLL. */
1314     pe_putimport(s, 0, name, (uintptr_t)val);
1315 #else
1316     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1317         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1318         SHN_ABS, name);
1319 #endif
1320     return 0;
1321 }
1322
1323 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1324 {
1325     s->output_type = output_type;
1326
1327     if (!s->nostdinc) {
1328         /* default include paths */
1329         /* -isystem paths have already been handled */
1330         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1331     }
1332
1333     /* if bound checking, then add corresponding sections */
1334 #ifdef CONFIG_TCC_BCHECK
1335     if (s->do_bounds_check) {
1336         /* define symbol */
1337         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1338         /* create bounds sections */
1339         bounds_section = new_section(s, ".bounds",
1340                                      SHT_PROGBITS, SHF_ALLOC);
1341         lbounds_section = new_section(s, ".lbounds",
1342                                       SHT_PROGBITS, SHF_ALLOC);
1343     }
1344 #endif
1345
1346     if (s->char_is_unsigned) {
1347         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1348     }
1349
1350     /* add debug sections */
1351     if (s->do_debug) {
1352         /* stab symbols */
1353         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1354         stab_section->sh_entsize = sizeof(Stab_Sym);
1355         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1356         put_elf_str(stabstr_section, "");
1357         stab_section->link = stabstr_section;
1358         /* put first entry */
1359         put_stabs("", 0, 0, 0, 0);
1360     }
1361
1362     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1363 #ifdef TCC_TARGET_PE
1364 # ifdef _WIN32
1365     tcc_add_systemdir(s);
1366 # endif
1367 #else
1368     /* add libc crt1/crti objects */
1369     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1370         !s->nostdlib) {
1371         if (output_type != TCC_OUTPUT_DLL)
1372             tcc_add_crt(s, "crt1.o");
1373         tcc_add_crt(s, "crti.o");
1374     }
1375 #endif
1376     return 0;
1377 }
1378
1379 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1380 {
1381     tcc_free(s->tcc_lib_path);
1382     s->tcc_lib_path = tcc_strdup(path);
1383 }
1384
1385 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1386 #define FD_INVERT 0x0002 /* invert value before storing */
1387
1388 typedef struct FlagDef {
1389     uint16_t offset;
1390     uint16_t flags;
1391     const char *name;
1392 } FlagDef;
1393
1394 static const FlagDef warning_defs[] = {
1395     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1396     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1397     { offsetof(TCCState, warn_error), 0, "error" },
1398     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1399       "implicit-function-declaration" },
1400 };
1401
1402 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1403                     const char *name, int value)
1404 {
1405     int i;
1406     const FlagDef *p;
1407     const char *r;
1408
1409     r = name;
1410     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1411         r += 3;
1412         value = !value;
1413     }
1414     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1415         if (!strcmp(r, p->name))
1416             goto found;
1417     }
1418     return -1;
1419  found:
1420     if (p->flags & FD_INVERT)
1421         value = !value;
1422     *(int *)((uint8_t *)s + p->offset) = value;
1423     return 0;
1424 }
1425
1426 /* set/reset a warning */
1427 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1428 {
1429     int i;
1430     const FlagDef *p;
1431
1432     if (!strcmp(warning_name, "all")) {
1433         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1434             if (p->flags & WD_ALL)
1435                 *(int *)((uint8_t *)s + p->offset) = 1;
1436         }
1437         return 0;
1438     } else {
1439         return set_flag(s, warning_defs, countof(warning_defs),
1440                         warning_name, value);
1441     }
1442 }
1443
1444 static const FlagDef flag_defs[] = {
1445     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1446     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1447     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1448     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1449 };
1450
1451 /* set/reset a flag */
1452 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1453 {
1454     return set_flag(s, flag_defs, countof(flag_defs),
1455                     flag_name, value);
1456 }
1457
1458
1459 static int strstart(const char *val, const char **str)
1460 {
1461     const char *p, *q;
1462     p = *str;
1463     q = val;
1464     while (*q) {
1465         if (*p != *q)
1466             return 0;
1467         p++;
1468         q++;
1469     }
1470     *str = p;
1471     return 1;
1472 }
1473
1474 /* Like strstart, but automatically takes into account that ld options can
1475  *
1476  * - start with double or single dash (e.g. '--soname' or '-soname')
1477  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1478  *   or '-Wl,-soname=x.so')
1479  *
1480  * you provide `val` always in 'option[=]' form (no leading -)
1481  */
1482 static int link_option(const char *str, const char *val, const char **ptr)
1483 {
1484     const char *p, *q;
1485
1486     /* there should be 1 or 2 dashes */
1487     if (*str++ != '-')
1488         return 0;
1489     if (*str == '-')
1490         str++;
1491
1492     /* then str & val should match (potentialy up to '=') */
1493     p = str;
1494     q = val;
1495
1496     while (*q != '\0' && *q != '=') {
1497         if (*p != *q)
1498             return 0;
1499         p++;
1500         q++;
1501     }
1502
1503     /* '=' near eos means ',' or '=' is ok */
1504     if (*q == '=') {
1505         if (*p != ',' && *p != '=')
1506             return 0;
1507         p++;
1508         q++;
1509     }
1510
1511     if (ptr)
1512         *ptr = p;
1513     return 1;
1514 }
1515
1516 static const char *skip_linker_arg(const char **str)
1517 {
1518     const char *s1 = *str;
1519     const char *s2 = strchr(s1, ',');
1520     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1521     return s2;
1522 }
1523
1524 static char *copy_linker_arg(const char *p)
1525 {
1526     const char *q = p;
1527     skip_linker_arg(&q);
1528     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1529 }
1530
1531 /* set linker options */
1532 static int tcc_set_linker(TCCState *s, const char *option)
1533 {
1534     while (option && *option) {
1535
1536         const char *p = option;
1537         char *end = NULL;
1538         int ignoring = 0;
1539
1540         if (link_option(option, "Bsymbolic", &p)) {
1541             s->symbolic = 1;
1542         } else if (link_option(option, "nostdlib", &p)) {
1543             s->nostdlib = 1;
1544         } else if (link_option(option, "fini=", &p)) {
1545             s->fini_symbol = copy_linker_arg(p);
1546             ignoring = 1;
1547         } else if (link_option(option, "image-base=", &p)
1548                 || link_option(option, "Ttext=", &p)) {
1549             s->text_addr = strtoull(p, &end, 16);
1550             s->has_text_addr = 1;
1551         } else if (link_option(option, "init=", &p)) {
1552             s->init_symbol = copy_linker_arg(p);
1553             ignoring = 1;
1554         } else if (link_option(option, "oformat=", &p)) {
1555 #if defined(TCC_TARGET_PE)
1556             if (strstart("pe-", &p)) {
1557 #elif defined(TCC_TARGET_X86_64)
1558             if (strstart("elf64-", &p)) {
1559 #else
1560             if (strstart("elf32-", &p)) {
1561 #endif
1562                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1563             } else if (!strcmp(p, "binary")) {
1564                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1565 #ifdef TCC_TARGET_COFF
1566             } else if (!strcmp(p, "coff")) {
1567                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1568 #endif
1569             } else
1570                 goto err;
1571
1572         } else if (link_option(option, "as-needed", &p)) {
1573             ignoring = 1;
1574         } else if (link_option(option, "O", &p)) {
1575             ignoring = 1;
1576         } else if (link_option(option, "rpath=", &p)) {
1577             s->rpath = copy_linker_arg(p);
1578         } else if (link_option(option, "section-alignment=", &p)) {
1579             s->section_align = strtoul(p, &end, 16);
1580         } else if (link_option(option, "soname=", &p)) {
1581             s->soname = copy_linker_arg(p);
1582 #ifdef TCC_TARGET_PE
1583         } else if (link_option(option, "file-alignment=", &p)) {
1584             s->pe_file_align = strtoul(p, &end, 16);
1585         } else if (link_option(option, "stack=", &p)) {
1586             s->pe_stack_size = strtoul(p, &end, 10);
1587         } else if (link_option(option, "subsystem=", &p)) {
1588 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1589             if (!strcmp(p, "native")) {
1590                 s->pe_subsystem = 1;
1591             } else if (!strcmp(p, "console")) {
1592                 s->pe_subsystem = 3;
1593             } else if (!strcmp(p, "gui")) {
1594                 s->pe_subsystem = 2;
1595             } else if (!strcmp(p, "posix")) {
1596                 s->pe_subsystem = 7;
1597             } else if (!strcmp(p, "efiapp")) {
1598                 s->pe_subsystem = 10;
1599             } else if (!strcmp(p, "efiboot")) {
1600                 s->pe_subsystem = 11;
1601             } else if (!strcmp(p, "efiruntime")) {
1602                 s->pe_subsystem = 12;
1603             } else if (!strcmp(p, "efirom")) {
1604                 s->pe_subsystem = 13;
1605 #elif defined(TCC_TARGET_ARM)
1606             if (!strcmp(p, "wince")) {
1607                 s->pe_subsystem = 9;
1608 #endif
1609             } else
1610                 goto err;
1611 #endif
1612         } else
1613             goto err;
1614
1615         if (ignoring && s->warn_unsupported) err: {
1616             char buf[100], *e;
1617             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1618             if (ignoring)
1619                 tcc_warning("unsupported linker option '%s'", buf);
1620             else
1621                 tcc_error("unsupported linker option '%s'", buf);
1622         }
1623         option = skip_linker_arg(&p);
1624     }
1625     return 0;
1626 }
1627
1628 typedef struct TCCOption {
1629     const char *name;
1630     uint16_t index;
1631     uint16_t flags;
1632 } TCCOption;
1633
1634 enum {
1635     TCC_OPTION_HELP,
1636     TCC_OPTION_I,
1637     TCC_OPTION_D,
1638     TCC_OPTION_U,
1639     TCC_OPTION_L,
1640     TCC_OPTION_B,
1641     TCC_OPTION_l,
1642     TCC_OPTION_bench,
1643     TCC_OPTION_bt,
1644     TCC_OPTION_b,
1645     TCC_OPTION_g,
1646     TCC_OPTION_c,
1647     TCC_OPTION_float_abi,
1648     TCC_OPTION_static,
1649     TCC_OPTION_shared,
1650     TCC_OPTION_soname,
1651     TCC_OPTION_o,
1652     TCC_OPTION_r,
1653     TCC_OPTION_s,
1654     TCC_OPTION_Wl,
1655     TCC_OPTION_W,
1656     TCC_OPTION_O,
1657     TCC_OPTION_m,
1658     TCC_OPTION_f,
1659     TCC_OPTION_isystem,
1660     TCC_OPTION_nostdinc,
1661     TCC_OPTION_nostdlib,
1662     TCC_OPTION_print_search_dirs,
1663     TCC_OPTION_rdynamic,
1664     TCC_OPTION_pedantic,
1665     TCC_OPTION_pthread,
1666     TCC_OPTION_run,
1667     TCC_OPTION_v,
1668     TCC_OPTION_w,
1669     TCC_OPTION_pipe,
1670     TCC_OPTION_E,
1671     TCC_OPTION_MD,
1672     TCC_OPTION_MF,
1673     TCC_OPTION_x,
1674     TCC_OPTION_dumpversion,
1675 };
1676
1677 #define TCC_OPTION_HAS_ARG 0x0001
1678 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1679
1680 static const TCCOption tcc_options[] = {
1681     { "h", TCC_OPTION_HELP, 0 },
1682     { "-help", TCC_OPTION_HELP, 0 },
1683     { "?", TCC_OPTION_HELP, 0 },
1684     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1685     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1686     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1687     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1688     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1689     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1690     { "bench", TCC_OPTION_bench, 0 },
1691 #ifdef CONFIG_TCC_BACKTRACE
1692     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1693 #endif
1694 #ifdef CONFIG_TCC_BCHECK
1695     { "b", TCC_OPTION_b, 0 },
1696 #endif
1697     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1698     { "c", TCC_OPTION_c, 0 },
1699 #ifdef TCC_TARGET_ARM
1700     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1701 #endif
1702     { "static", TCC_OPTION_static, 0 },
1703     { "shared", TCC_OPTION_shared, 0 },
1704     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1705     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1706     { "pedantic", TCC_OPTION_pedantic, 0},
1707     { "pthread", TCC_OPTION_pthread, 0},
1708     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1709     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1710     { "r", TCC_OPTION_r, 0 },
1711     { "s", TCC_OPTION_s, 0 },
1712     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1713     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1714     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1715     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1716     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1717     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1718     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1719     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1720     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1721     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1722     { "w", TCC_OPTION_w, 0 },
1723     { "pipe", TCC_OPTION_pipe, 0},
1724     { "E", TCC_OPTION_E, 0},
1725     { "MD", TCC_OPTION_MD, 0},
1726     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1727     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1728     { "dumpversion", TCC_OPTION_dumpversion, 0},
1729     { NULL, 0, 0 },
1730 };
1731
1732 static void parse_option_D(TCCState *s1, const char *optarg)
1733 {
1734     char *sym = tcc_strdup(optarg);
1735     char *value = strchr(sym, '=');
1736     if (value)
1737         *value++ = '\0';
1738     tcc_define_symbol(s1, sym, value);
1739     tcc_free(sym);
1740 }
1741
1742 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1743 {
1744     const TCCOption *popt;
1745     const char *optarg, *r;
1746     int run = 0;
1747     int pthread = 0;
1748     int optind = 0;
1749
1750     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1751     CString linker_arg;
1752     cstr_new(&linker_arg);
1753
1754     while (optind < argc) {
1755
1756         r = argv[optind++];
1757         if (r[0] != '-' || r[1] == '\0') {
1758             /* add a new file */
1759             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1760             if (run) {
1761                 optind--;
1762                 /* argv[0] will be this file */
1763                 break;
1764             }
1765             continue;
1766         }
1767
1768         /* find option in table */
1769         for(popt = tcc_options; ; ++popt) {
1770             const char *p1 = popt->name;
1771             const char *r1 = r + 1;
1772             if (p1 == NULL)
1773                 tcc_error("invalid option -- '%s'", r);
1774             if (!strstart(p1, &r1))
1775                 continue;
1776             optarg = r1;
1777             if (popt->flags & TCC_OPTION_HAS_ARG) {
1778                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1779                     if (optind >= argc)
1780                         tcc_error("argument to '%s' is missing", r);
1781                     optarg = argv[optind++];
1782                 }
1783             } else if (*r1 != '\0')
1784                 continue;
1785             break;
1786         }
1787
1788         switch(popt->index) {
1789         case TCC_OPTION_HELP:
1790             return 0;
1791         case TCC_OPTION_I:
1792             if (tcc_add_include_path(s, optarg) < 0)
1793                 tcc_error("too many include paths");
1794             break;
1795         case TCC_OPTION_D:
1796             parse_option_D(s, optarg);
1797             break;
1798         case TCC_OPTION_U:
1799             tcc_undefine_symbol(s, optarg);
1800             break;
1801         case TCC_OPTION_L:
1802             tcc_add_library_path(s, optarg);
1803             break;
1804         case TCC_OPTION_B:
1805             /* set tcc utilities path (mainly for tcc development) */
1806             tcc_set_lib_path(s, optarg);
1807             break;
1808         case TCC_OPTION_l:
1809             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1810             s->nb_libraries++;
1811             break;
1812         case TCC_OPTION_pthread:
1813             parse_option_D(s, "_REENTRANT");
1814             pthread = 1;
1815             break;
1816         case TCC_OPTION_bench:
1817             s->do_bench = 1;
1818             break;
1819 #ifdef CONFIG_TCC_BACKTRACE
1820         case TCC_OPTION_bt:
1821             tcc_set_num_callers(atoi(optarg));
1822             break;
1823 #endif
1824 #ifdef CONFIG_TCC_BCHECK
1825         case TCC_OPTION_b:
1826             s->do_bounds_check = 1;
1827             s->do_debug = 1;
1828             break;
1829 #endif
1830         case TCC_OPTION_g:
1831             s->do_debug = 1;
1832             break;
1833         case TCC_OPTION_c:
1834             if (s->output_type)
1835                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
1836             s->output_type = TCC_OUTPUT_OBJ;
1837             break;
1838 #ifdef TCC_TARGET_ARM
1839         case TCC_OPTION_float_abi:
1840             /* tcc doesn't support soft float yet */
1841             if (!strcmp(optarg, "softfp")) {
1842                 s->float_abi = ARM_SOFTFP_FLOAT;
1843                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1844             } else if (!strcmp(optarg, "hard"))
1845                 s->float_abi = ARM_HARD_FLOAT;
1846             else
1847                 tcc_error("unsupported float abi '%s'", optarg);
1848             break;
1849 #endif
1850         case TCC_OPTION_static:
1851             s->static_link = 1;
1852             break;
1853         case TCC_OPTION_shared:
1854             if (s->output_type)
1855                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
1856             s->output_type = TCC_OUTPUT_DLL;
1857             break;
1858         case TCC_OPTION_soname:
1859             s->soname = tcc_strdup(optarg);
1860             break;
1861         case TCC_OPTION_m:
1862             s->option_m = tcc_strdup(optarg);
1863             break;
1864         case TCC_OPTION_o:
1865             s->outfile = tcc_strdup(optarg);
1866             break;
1867         case TCC_OPTION_r:
1868             /* generate a .o merging several output files */
1869             if (s->output_type)
1870                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
1871             s->option_r = 1;
1872             s->output_type = TCC_OUTPUT_OBJ;
1873             break;
1874         case TCC_OPTION_isystem:
1875             tcc_add_sysinclude_path(s, optarg);
1876             break;
1877         case TCC_OPTION_nostdinc:
1878             s->nostdinc = 1;
1879             break;
1880         case TCC_OPTION_nostdlib:
1881             s->nostdlib = 1;
1882             break;
1883         case TCC_OPTION_print_search_dirs:
1884             s->print_search_dirs = 1;
1885             break;
1886         case TCC_OPTION_run:
1887             if (s->output_type)
1888                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
1889             s->output_type = TCC_OUTPUT_MEMORY;
1890             tcc_set_options(s, optarg);
1891             run = 1;
1892             break;
1893         case TCC_OPTION_v:
1894             do ++s->verbose; while (*optarg++ == 'v');
1895             break;
1896         case TCC_OPTION_f:
1897             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1898                 goto unsupported_option;
1899             break;
1900         case TCC_OPTION_W:
1901             if (tcc_set_warning(s, optarg, 1) < 0 &&
1902                 s->warn_unsupported)
1903                 goto unsupported_option;
1904             break;
1905         case TCC_OPTION_w:
1906             s->warn_none = 1;
1907             break;
1908         case TCC_OPTION_rdynamic:
1909             s->rdynamic = 1;
1910             break;
1911         case TCC_OPTION_Wl:
1912             if (linker_arg.size)
1913                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1914             cstr_cat(&linker_arg, optarg);
1915             cstr_ccat(&linker_arg, '\0');
1916             break;
1917         case TCC_OPTION_E:
1918             if (s->output_type)
1919                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
1920             s->output_type = TCC_OUTPUT_PREPROCESS;
1921             break;
1922         case TCC_OPTION_MD:
1923             s->gen_deps = 1;
1924             break;
1925         case TCC_OPTION_MF:
1926             s->deps_outfile = tcc_strdup(optarg);
1927             break;
1928         case TCC_OPTION_dumpversion:
1929             printf ("%s\n", TCC_VERSION);
1930             exit(0);
1931         case TCC_OPTION_O:
1932         case TCC_OPTION_pedantic:
1933         case TCC_OPTION_pipe:
1934         case TCC_OPTION_s:
1935         case TCC_OPTION_x:
1936             /* ignored */
1937             break;
1938         default:
1939             if (s->warn_unsupported) {
1940             unsupported_option:
1941                 tcc_warning("unsupported option '%s'", r);
1942             }
1943             break;
1944         }
1945     }
1946
1947     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
1948         tcc_set_options(s, "-lpthread");
1949
1950     tcc_set_linker(s, (const char *)linker_arg.data);
1951     cstr_free(&linker_arg);
1952
1953     return optind;
1954 }
1955
1956 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
1957 {
1958     const char *s1;
1959     char **argv, *arg;
1960     int argc, len;
1961     int ret;
1962
1963     argc = 0, argv = NULL;
1964     for(;;) {
1965         while (is_space(*str))
1966             str++;
1967         if (*str == '\0')
1968             break;
1969         s1 = str;
1970         while (*str != '\0' && !is_space(*str))
1971             str++;
1972         len = str - s1;
1973         arg = tcc_malloc(len + 1);
1974         pstrncpy(arg, s1, len);
1975         dynarray_add((void ***)&argv, &argc, arg);
1976     }
1977     ret = tcc_parse_args(s, argc, argv);
1978     dynarray_reset(&argv, &argc);
1979     return ret;
1980 }
1981
1982 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1983 {
1984     double tt;
1985     tt = (double)total_time / 1000000.0;
1986     if (tt < 0.001)
1987         tt = 0.001;
1988     if (total_bytes < 1)
1989         total_bytes = 1;
1990     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1991            tok_ident - TOK_IDENT, total_lines, total_bytes,
1992            tt, (int)(total_lines / tt),
1993            total_bytes / tt / 1000000.0);
1994 }
1995
1996 PUB_FUNC void tcc_set_environment(TCCState *s)
1997 {
1998     char * path;
1999
2000     path = getenv("C_INCLUDE_PATH");
2001     if(path != NULL) {
2002         tcc_add_include_path(s, path);
2003     }
2004     path = getenv("CPATH");
2005     if(path != NULL) {
2006         tcc_add_include_path(s, path);
2007     }
2008     path = getenv("LIBRARY_PATH");
2009     if(path != NULL) {
2010         tcc_add_library_path(s, path);
2011     }
2012 }