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         if (tcc_state->do_bounds_check) {
 463             char buf[32];
 464
 465             /* XXX: avoid doing that for statics ? */
 466             /* if bound checking is activated, we change some function
 467                names by adding the "__bound" prefix */
 468             switch(sym->v) {
 469 #ifdef TCC_TARGET_PE
 470             /* XXX: we rely only on malloc hooks */
 471             case TOK_malloc:
 472             case TOK_free:
 473             case TOK_realloc:
 474             case TOK_memalign:
 475             case TOK_calloc:
 476 #endif
 477             case TOK_memcpy:
 478             case TOK_memmove:
 479             case TOK_memset:
 480             case TOK_strlen:
 481             case TOK_strcpy:
 482             case TOK_alloca:
 483                 strcpy(buf, "__bound_");
 484                 strcat(buf, name);
 485                 name = buf;
 486                 break;
 487             }
 488         }
 489 #endif
 490         other = 0;
 491
 492 #ifdef TCC_TARGET_PE
 493         if (sym->type.t & VT_EXPORT)
 494             other |= ST_PE_EXPORT;
 495         if (sym_type == STT_FUNC && sym->type.ref) {
 496             Sym *ref = sym->type.ref;
 497             if (ref->a.func_export)
 498                 other |= ST_PE_EXPORT;
 499             if (ref->a.func_call == FUNC_STDCALL && can_add_underscore) {
 500                 sprintf(buf1, "_%s@%d", name, ref->a.func_args * PTR_SIZE);
 501                 name = buf1;
 502                 other |= ST_PE_STDCALL;
 503                 can_add_underscore = 0;
 504             }
 505         } else {
 506             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 507                 other |= ST_PE_IMPORT;
 508             if (sym->type.t & VT_IMPORT)
 509                 other |= ST_PE_IMPORT;
 510         }
 511 #else
 512         if (! (sym->type.t & VT_STATIC))
 513             other = (sym->type.t & VT_VIS_MASK) >> VT_VIS_SHIFT;
 514 #endif
 515         if (tcc_state->leading_underscore && can_add_underscore) {
 516             buf1[0] = '_';
 517             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 518             name = buf1;
 519         }
 520         if (sym->asm_label) {
 521             name = sym->asm_label;
 522         }
 523         info = ELFW(ST_INFO)(sym_bind, sym_type);
 524         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 525     } else {
 526         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 527         esym->st_value = value;
 528         esym->st_size = size;
 529         esym->st_shndx = sh_num;
 530     }
 531 }
 532
 533 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 534                            addr_t value, unsigned long size)
 535 {
 536     put_extern_sym2(sym, section, value, size, 1);
 537 }
 538
 539 /* add a new relocation entry to symbol 'sym' in section 's' */
 540 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 541 {
 542     int c = 0;
 543     if (sym) {
 544         if (0 == sym->c)
 545             put_extern_sym(sym, NULL, 0, 0);
 546         c = sym->c;
 547     }
 548     /* now we can add ELF relocation info */
 549     put_elf_reloc(symtab_section, s, offset, type, c);
 550 }
 551
 552 /********************************************************/
 553
 554 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 555 {
 556     int len;
 557     len = strlen(buf);
 558     vsnprintf(buf + len, buf_size - len, fmt, ap);
 559 }
 560
 561 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 562 {
 563     va_list ap;
 564     va_start(ap, fmt);
 565     strcat_vprintf(buf, buf_size, fmt, ap);
 566     va_end(ap);
 567 }
 568
 569 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 570 {
 571     char buf[2048];
 572     BufferedFile **pf, *f;
 573
 574     buf[0] = '\0';
 575     /* use upper file if inline ":asm:" or token ":paste:" */
 576     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 577      ;
 578     if (f) {
 579         int line_num = f->line_num;
 580         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 581             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 582                 (*pf)->filename, (*pf)->line_num);
 583         if (line_num > 0) {
 584             if(tok == TOK_LINEFEED || (tok == CH_EOF && line_num > 1))
 585                 line_num--;
 586             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 587                 f->filename, line_num);
 588         } else {
 589             strcat_printf(buf, sizeof(buf), "%s: ",
 590                 f->filename);
 591         }
 592     } else {
 593         strcat_printf(buf, sizeof(buf), "tcc: ");
 594     }
 595     if (is_warning)
 596         strcat_printf(buf, sizeof(buf), "warning: ");
 597     else
 598         strcat_printf(buf, sizeof(buf), "error: ");
 599     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 600
 601     if (!s1->error_func) {
 602         /* default case: stderr */
 603         fprintf(stderr, "%s\n", buf);
 604     } else {
 605         s1->error_func(s1->error_opaque, buf);
 606     }
 607     if (!is_warning || s1->warn_error)
 608         s1->nb_errors++;
 609 }
 610
 611 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 612                         void (*error_func)(void *opaque, const char *msg))
 613 {
 614     s->error_opaque = error_opaque;
 615     s->error_func = error_func;
 616 }
 617
 618 /* error without aborting current compilation */
 619 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 620 {
 621     TCCState *s1 = tcc_state;
 622     va_list ap;
 623
 624     va_start(ap, fmt);
 625     error1(s1, 0, fmt, ap);
 626     va_end(ap);
 627 }
 628
 629 PUB_FUNC void tcc_error(const char *fmt, ...)
 630 {
 631     TCCState *s1 = tcc_state;
 632     va_list ap;
 633
 634     va_start(ap, fmt);
 635     error1(s1, 0, fmt, ap);
 636     va_end(ap);
 637     /* better than nothing: in some cases, we accept to handle errors */
 638     if (s1->error_set_jmp_enabled) {
 639         longjmp(s1->error_jmp_buf, 1);
 640     } else {
 641         /* XXX: eliminate this someday */
 642         exit(1);
 643     }
 644 }
 645
 646 PUB_FUNC void tcc_warning(const char *fmt, ...)
 647 {
 648     TCCState *s1 = tcc_state;
 649     va_list ap;
 650
 651     if (s1->warn_none)
 652         return;
 653
 654     va_start(ap, fmt);
 655     error1(s1, 1, fmt, ap);
 656     va_end(ap);
 657 }
 658
 659 /********************************************************/
 660 /* I/O layer */
 661
 662 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 663 {
 664     BufferedFile *bf;
 665     int buflen = initlen ? initlen : IO_BUF_SIZE;
 666
 667     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 668     bf->buf_ptr = bf->buffer;
 669     bf->buf_end = bf->buffer + initlen;
 670     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 671     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 672 #ifdef _WIN32
 673     normalize_slashes(bf->filename);
 674 #endif
 675     bf->line_num = 1;
 676     bf->ifndef_macro = 0;
 677     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 678     bf->fd = -1;
 679     bf->prev = file;
 680     file = bf;
 681 }
 682
 683 ST_FUNC void tcc_close(void)
 684 {
 685     BufferedFile *bf = file;
 686     if (bf->fd > 0) {
 687         close(bf->fd);
 688         total_lines += bf->line_num;
 689     }
 690     file = bf->prev;
 691     tcc_free(bf);
 692 }
 693
 694 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 695 {
 696     int fd;
 697     if (strcmp(filename, "-") == 0)
 698         fd = 0, filename = "stdin";
 699     else
 700         fd = open(filename, O_RDONLY | O_BINARY);
 701     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 702         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 703                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 704     if (fd < 0)
 705         return -1;
 706
 707     tcc_open_bf(s1, filename, 0);
 708     file->fd = fd;
 709     return fd;
 710 }
 711
 712 /* compile the C file opened in 'file'. Return non zero if errors. */
 713 static int tcc_compile(TCCState *s1)
 714 {
 715     Sym *define_start;
 716     SValue *pvtop;
 717     char buf[512];
 718     volatile int section_sym;
 719
 720 #ifdef INC_DEBUG
 721     printf("%s: **** new file\n", file->filename);
 722 #endif
 723     preprocess_init(s1);
 724
 725     cur_text_section = NULL;
 726     funcname = "";
 727     anon_sym = SYM_FIRST_ANOM;
 728
 729     /* file info: full path + filename */
 730     section_sym = 0; /* avoid warning */
 731     if (s1->do_debug) {
 732         section_sym = put_elf_sym(symtab_section, 0, 0,
 733                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 734                                   text_section->sh_num, NULL);
 735         getcwd(buf, sizeof(buf));
 736 #ifdef _WIN32
 737         normalize_slashes(buf);
 738 #endif
 739         pstrcat(buf, sizeof(buf), "/");
 740         put_stabs_r(buf, N_SO, 0, 0,
 741                     text_section->data_offset, text_section, section_sym);
 742         put_stabs_r(file->filename, N_SO, 0, 0,
 743                     text_section->data_offset, text_section, section_sym);
 744     }
 745     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 746        symbols can be safely used */
 747     put_elf_sym(symtab_section, 0, 0,
 748                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 749                 SHN_ABS, file->filename);
 750
 751     /* define some often used types */
 752     int_type.t = VT_INT;
 753
 754     char_pointer_type.t = VT_BYTE;
 755     mk_pointer(&char_pointer_type);
 756
 757 #if PTR_SIZE == 4
 758     size_type.t = VT_INT;
 759 #else
 760     size_type.t = VT_LLONG;
 761 #endif
 762
 763     func_old_type.t = VT_FUNC;
 764     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 765 #ifdef TCC_TARGET_ARM
 766     arm_init(s1);
 767 #endif
 768
 769 #if 0
 770     /* define 'void *alloca(unsigned int)' builtin function */
 771     {
 772         Sym *s1;
 773
 774         p = anon_sym++;
 775         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 776         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 777         s1->next = NULL;
 778         sym->next = s1;
 779         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 780     }
 781 #endif
 782
 783     define_start = define_stack;
 784     nocode_wanted = 1;
 785
 786     if (setjmp(s1->error_jmp_buf) == 0) {
 787         s1->nb_errors = 0;
 788         s1->error_set_jmp_enabled = 1;
 789
 790         ch = file->buf_ptr[0];
 791         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 792         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 793         pvtop = vtop;
 794         next();
 795         decl(VT_CONST);
 796         if (tok != TOK_EOF)
 797             expect("declaration");
 798         if (pvtop != vtop)
 799             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 800
 801         /* end of translation unit info */
 802         if (s1->do_debug) {
 803             put_stabs_r(NULL, N_SO, 0, 0,
 804                         text_section->data_offset, text_section, section_sym);
 805         }
 806     }
 807
 808     s1->error_set_jmp_enabled = 0;
 809
 810     /* reset define stack, but leave -Dsymbols (may be incorrect if
 811        they are undefined) */
 812     free_defines(define_start);
 813
 814     gen_inline_functions();
 815
 816     sym_pop(&global_stack, NULL);
 817     sym_pop(&local_stack, NULL);
 818
 819     return s1->nb_errors != 0 ? -1 : 0;
 820 }
 821
 822 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 823 {
 824     int len, ret;
 825     len = strlen(str);
 826
 827     tcc_open_bf(s, "<string>", len);
 828     memcpy(file->buffer, str, len);
 829     ret = tcc_compile(s);
 830     tcc_close();
 831     return ret;
 832 }
 833
 834 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 835 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 836 {
 837     int len1, len2;
 838     /* default value */
 839     if (!value)
 840         value = "1";
 841     len1 = strlen(sym);
 842     len2 = strlen(value);
 843
 844     /* init file structure */
 845     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 846     memcpy(file->buffer, sym, len1);
 847     file->buffer[len1] = ' ';
 848     memcpy(file->buffer + len1 + 1, value, len2);
 849
 850     /* parse with define parser */
 851     ch = file->buf_ptr[0];
 852     next_nomacro();
 853     parse_define();
 854
 855     tcc_close();
 856 }
 857
 858 /* undefine a preprocessor symbol */
 859 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 860 {
 861     TokenSym *ts;
 862     Sym *s;
 863     ts = tok_alloc(sym, strlen(sym));
 864     s = define_find(ts->tok);
 865     /* undefine symbol by putting an invalid name */
 866     if (s)
 867         define_undef(s);
 868 }
 869
 870 /* cleanup all static data used during compilation */
 871 static void tcc_cleanup(void)
 872 {
 873     int i, n;
 874     CSym *def;
 875     if (NULL == tcc_state)
 876         return;
 877     tcc_state = NULL;
 878
 879     /* free -D defines */
 880     free_defines(NULL);
 881
 882     /* free tokens */
 883     n = tok_ident - TOK_IDENT;
 884     for(i = 0; i < n; i++){
 885         def = &table_ident[i]->sym_define;
 886         tcc_free(def->data);
 887         tcc_free(table_ident[i]);
 888     }
 889     tcc_free(table_ident);
 890
 891     /* free sym_pools */
 892     dynarray_reset(&sym_pools, &nb_sym_pools);
 893     /* string buffer */
 894     cstr_free(&tokcstr);
 895     /* reset symbol stack */
 896     sym_free_first = NULL;
 897     /* cleanup from error/setjmp */
 898     macro_ptr = NULL;
 899 }
 900
 901 LIBTCCAPI TCCState *tcc_new(void)
 902 {
 903     TCCState *s;
 904     char buffer[100];
 905     int a,b,c;
 906
 907     tcc_cleanup();
 908
 909     s = tcc_mallocz(sizeof(TCCState));
 910     if (!s)
 911         return NULL;
 912     tcc_state = s;
 913 #ifdef _WIN32
 914     tcc_set_lib_path_w32(s);
 915 #else
 916     tcc_set_lib_path(s, CONFIG_TCCDIR);
 917 #endif
 918     s->output_type = TCC_OUTPUT_MEMORY;
 919     preprocess_new();
 920     s->include_stack_ptr = s->include_stack;
 921
 922     /* we add dummy defines for some special macros to speed up tests
 923        and to have working defined() */
 924     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 925     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 926     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 927     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 928
 929     /* define __TINYC__ 92X  */
 930     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 931     sprintf(buffer, "%d", a*10000 + b*100 + c);
 932     tcc_define_symbol(s, "__TINYC__", buffer);
 933
 934     /* standard defines */
 935     tcc_define_symbol(s, "__STDC__", NULL);
 936     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 937     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 938
 939     /* target defines */
 940 #if defined(TCC_TARGET_I386)
 941     tcc_define_symbol(s, "__i386__", NULL);
 942     tcc_define_symbol(s, "__i386", NULL);
 943     tcc_define_symbol(s, "i386", NULL);
 944 #elif defined(TCC_TARGET_X86_64)
 945     tcc_define_symbol(s, "__x86_64__", NULL);
 946 #elif defined(TCC_TARGET_ARM)
 947     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 948     tcc_define_symbol(s, "__arm_elf__", NULL);
 949     tcc_define_symbol(s, "__arm_elf", NULL);
 950     tcc_define_symbol(s, "arm_elf", NULL);
 951     tcc_define_symbol(s, "__arm__", NULL);
 952     tcc_define_symbol(s, "__arm", NULL);
 953     tcc_define_symbol(s, "arm", NULL);
 954     tcc_define_symbol(s, "__APCS_32__", NULL);
 955     tcc_define_symbol(s, "__ARMEL__", NULL);
 956 #if defined(TCC_ARM_EABI)
 957     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 958 #endif
 959 #if defined(TCC_ARM_HARDFLOAT)
 960     s->float_abi = ARM_HARD_FLOAT;
 961     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 962 #else
 963     s->float_abi = ARM_SOFTFP_FLOAT;
 964 #endif
 965 #endif
 966
 967 #ifdef TCC_TARGET_PE
 968     tcc_define_symbol(s, "_WIN32", NULL);
 969 # ifdef TCC_TARGET_X86_64
 970     tcc_define_symbol(s, "_WIN64", NULL);
 971 # endif
 972 #else
 973     tcc_define_symbol(s, "__unix__", NULL);
 974     tcc_define_symbol(s, "__unix", NULL);
 975     tcc_define_symbol(s, "unix", NULL);
 976 # if defined(__linux)
 977     tcc_define_symbol(s, "__linux__", NULL);
 978     tcc_define_symbol(s, "__linux", NULL);
 979 # endif
 980 # if defined(__FreeBSD__)
 981 #  define str(s) #s
 982     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 983 #  undef str
 984 # endif
 985 # if defined(__FreeBSD_kernel__)
 986     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 987 # endif
 988 #endif
 989
 990     /* TinyCC & gcc defines */
 991 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 992     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 993     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 994 #else
 995     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 996     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 997 #endif
 998
 999 #ifdef TCC_TARGET_PE
1000     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1001     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1002 #else
1003     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1004     /* wint_t is unsigned int by default, but (signed) int on BSDs
1005        and unsigned short on windows.  Other OSes might have still
1006        other conventions, sigh.  */
1007 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
1008     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1009 #else
1010     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1011 #endif
1012 #endif
1013
1014 #ifndef TCC_TARGET_PE
1015     /* glibc defines */
1016     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1017     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1018     /* paths for crt objects */
1019     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1020 #endif
1021
1022     /* no section zero */
1023     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1024
1025     /* create standard sections */
1026     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1027     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1028     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1029
1030     /* symbols are always generated for linking stage */
1031     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1032                                 ".strtab",
1033                                 ".hashtab", SHF_PRIVATE);
1034     strtab_section = symtab_section->link;
1035     s->symtab = symtab_section;
1036
1037     /* private symbol table for dynamic symbols */
1038     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1039                                       ".dynstrtab",
1040                                       ".dynhashtab", SHF_PRIVATE);
1041     s->alacarte_link = 1;
1042     s->nocommon = 1;
1043
1044 #ifdef CHAR_IS_UNSIGNED
1045     s->char_is_unsigned = 1;
1046 #endif
1047     /* enable this if you want symbols with leading underscore on windows: */
1048 #if 0 /* def TCC_TARGET_PE */
1049     s->leading_underscore = 1;
1050 #endif
1051 #ifdef TCC_TARGET_I386
1052     s->seg_size = 32;
1053 #endif
1054 #ifdef TCC_IS_NATIVE
1055     s->runtime_main = "main";
1056 #endif
1057     return s;
1058 }
1059
1060 LIBTCCAPI void tcc_delete(TCCState *s1)
1061 {
1062     int i;
1063
1064     tcc_cleanup();
1065
1066     /* free all sections */
1067     for(i = 1; i < s1->nb_sections; i++)
1068         free_section(s1->sections[i]);
1069     dynarray_reset(&s1->sections, &s1->nb_sections);
1070
1071     for(i = 0; i < s1->nb_priv_sections; i++)
1072         free_section(s1->priv_sections[i]);
1073     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1074
1075     /* free any loaded DLLs */
1076 #ifdef TCC_IS_NATIVE
1077     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1078         DLLReference *ref = s1->loaded_dlls[i];
1079         if ( ref->handle )
1080             dlclose(ref->handle);
1081     }
1082 #endif
1083
1084     /* free loaded dlls array */
1085     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1086
1087     /* free library paths */
1088     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1089     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1090
1091     /* free include paths */
1092     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1093     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1094     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1095
1096     tcc_free(s1->tcc_lib_path);
1097     tcc_free(s1->soname);
1098     tcc_free(s1->rpath);
1099     tcc_free(s1->init_symbol);
1100     tcc_free(s1->fini_symbol);
1101     tcc_free(s1->outfile);
1102     tcc_free(s1->deps_outfile);
1103     dynarray_reset(&s1->files, &s1->nb_files);
1104     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1105
1106 #ifdef TCC_IS_NATIVE
1107 # ifdef HAVE_SELINUX
1108     munmap (s1->write_mem, s1->mem_size);
1109     munmap (s1->runtime_mem, s1->mem_size);
1110 # else
1111     tcc_free(s1->runtime_mem);
1112 # endif
1113 #endif
1114
1115     if(s1->sym_attrs) tcc_free(s1->sym_attrs);
1116
1117     tcc_free(s1);
1118 }
1119
1120 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1121 {
1122     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1123     return 0;
1124 }
1125
1126 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1127 {
1128     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1129     return 0;
1130 }
1131
1132 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1133 {
1134     const char *ext;
1135     ElfW(Ehdr) ehdr;
1136     int fd, ret, size;
1137
1138     /* find source file type with extension */
1139     ext = tcc_fileextension(filename);
1140     if (ext[0])
1141         ext++;
1142
1143 #ifdef CONFIG_TCC_ASM
1144     /* if .S file, define __ASSEMBLER__ like gcc does */
1145     if (!strcmp(ext, "S"))
1146         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1147 #endif
1148
1149     /* open the file */
1150     ret = tcc_open(s1, filename);
1151     if (ret < 0) {
1152         if (flags & AFF_PRINT_ERROR)
1153             tcc_error_noabort("file '%s' not found", filename);
1154         return ret;
1155     }
1156
1157     /* update target deps */
1158     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1159             tcc_strdup(filename));
1160
1161     if (flags & AFF_PREPROCESS) {
1162         ret = tcc_preprocess(s1);
1163         goto the_end;
1164     }
1165
1166     if (!ext[0] || !PATHCMP(ext, "c")) {
1167         /* C file assumed */
1168         ret = tcc_compile(s1);
1169         goto the_end;
1170     }
1171
1172 #ifdef CONFIG_TCC_ASM
1173     if (!strcmp(ext, "S")) {
1174         /* preprocessed assembler */
1175         ret = tcc_assemble(s1, 1);
1176         goto the_end;
1177     }
1178
1179     if (!strcmp(ext, "s")) {
1180         /* non preprocessed assembler */
1181         ret = tcc_assemble(s1, 0);
1182         goto the_end;
1183     }
1184 #endif
1185
1186     fd = file->fd;
1187     /* assume executable format: auto guess file type */
1188     size = read(fd, &ehdr, sizeof(ehdr));
1189     lseek(fd, 0, SEEK_SET);
1190     if (size <= 0) {
1191         tcc_error_noabort("could not read header");
1192         goto the_end;
1193     }
1194
1195     if (size == sizeof(ehdr) &&
1196         ehdr.e_ident[0] == ELFMAG0 &&
1197         ehdr.e_ident[1] == ELFMAG1 &&
1198         ehdr.e_ident[2] == ELFMAG2 &&
1199         ehdr.e_ident[3] == ELFMAG3) {
1200
1201         /* do not display line number if error */
1202         file->line_num = 0;
1203         if (ehdr.e_type == ET_REL) {
1204             ret = tcc_load_object_file(s1, fd, 0);
1205             goto the_end;
1206
1207         }
1208 #ifndef TCC_TARGET_PE
1209         if (ehdr.e_type == ET_DYN) {
1210             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1211 #ifdef TCC_IS_NATIVE
1212                 void *h;
1213                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1214                 if (h)
1215 #endif
1216                     ret = 0;
1217             } else {
1218                 ret = tcc_load_dll(s1, fd, filename,
1219                                    (flags & AFF_REFERENCED_DLL) != 0);
1220             }
1221             goto the_end;
1222         }
1223 #endif
1224         tcc_error_noabort("unrecognized ELF file");
1225         goto the_end;
1226     }
1227
1228     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1229         file->line_num = 0; /* do not display line number if error */
1230         ret = tcc_load_archive(s1, fd);
1231         goto the_end;
1232     }
1233
1234 #ifdef TCC_TARGET_COFF
1235     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1236         ret = tcc_load_coff(s1, fd);
1237         goto the_end;
1238     }
1239 #endif
1240
1241 #ifdef TCC_TARGET_PE
1242     ret = pe_load_file(s1, filename, fd);
1243 #else
1244     /* as GNU ld, consider it is an ld script if not recognized */
1245     ret = tcc_load_ldscript(s1);
1246 #endif
1247     if (ret < 0)
1248         tcc_error_noabort("unrecognized file type");
1249
1250 the_end:
1251     tcc_close();
1252     return ret;
1253 }
1254
1255 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1256 {
1257     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1258         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1259     else
1260         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1261 }
1262
1263 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1264 {
1265     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1266     return 0;
1267 }
1268
1269 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1270     const char *filename, int flags, char **paths, int nb_paths)
1271 {
1272     char buf[1024];
1273     int i;
1274
1275     for(i = 0; i < nb_paths; i++) {
1276         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1277         if (tcc_add_file_internal(s, buf, flags) == 0)
1278             return 0;
1279     }
1280     return -1;
1281 }
1282
1283 /* find and load a dll. Return non zero if not found */
1284 /* XXX: add '-rpath' option support ? */
1285 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1286 {
1287     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1288         s->library_paths, s->nb_library_paths);
1289 }
1290
1291 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1292 {
1293     if (-1 == tcc_add_library_internal(s, "%s/%s",
1294         filename, 0, s->crt_paths, s->nb_crt_paths))
1295         tcc_error_noabort("file '%s' not found", filename);
1296     return 0;
1297 }
1298
1299 /* the library name is the same as the argument of the '-l' option */
1300 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1301 {
1302 #ifdef TCC_TARGET_PE
1303     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", "%s/%s.c", NULL };
1304     const char **pp = s->static_link ? libs + 4 : libs;
1305 #else
1306     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1307     const char **pp = s->static_link ? libs + 1 : libs;
1308 #endif
1309     while (*pp) {
1310         if (0 == tcc_add_library_internal(s, *pp,
1311             libraryname, 0, s->library_paths, s->nb_library_paths)) {
1312 #ifdef TCC_TARGET_PE
1313             /* extra search for *.c file together with *.def file */
1314             if (pp < libs + 2)
1315                 tcc_add_library_internal(s, *(libs + 5), libraryname, 0,
1316                     s->library_paths, s->nb_library_paths);
1317 #endif
1318             return 0;
1319         }
1320         ++pp;
1321     }
1322     return -1;
1323 }
1324
1325 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1326 {
1327 #ifdef TCC_TARGET_PE
1328     /* On x86_64 'val' might not be reachable with a 32bit offset.
1329        So it is handled here as if it were in a DLL. */
1330     pe_putimport(s, 0, name, (uintptr_t)val);
1331 #else
1332     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1333         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1334         SHN_ABS, name);
1335 #endif
1336     return 0;
1337 }
1338
1339 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1340 {
1341     s->output_type = output_type;
1342
1343     if (!s->nostdinc) {
1344         /* default include paths */
1345         /* -isystem paths have already been handled */
1346         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1347     }
1348
1349     /* if bound checking, then add corresponding sections */
1350 #ifdef CONFIG_TCC_BCHECK
1351     if (s->do_bounds_check) {
1352         /* define symbol */
1353         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1354         /* create bounds sections */
1355         bounds_section = new_section(s, ".bounds",
1356                                      SHT_PROGBITS, SHF_ALLOC);
1357         lbounds_section = new_section(s, ".lbounds",
1358                                       SHT_PROGBITS, SHF_ALLOC);
1359     }
1360 #endif
1361
1362     if (s->char_is_unsigned) {
1363         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1364     }
1365
1366     /* add debug sections */
1367     if (s->do_debug) {
1368         /* stab symbols */
1369         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1370         stab_section->sh_entsize = sizeof(Stab_Sym);
1371         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1372         put_elf_str(stabstr_section, "");
1373         stab_section->link = stabstr_section;
1374         /* put first entry */
1375         put_stabs("", 0, 0, 0, 0);
1376     }
1377
1378     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1379 #ifdef TCC_TARGET_PE
1380 # ifdef _WIN32
1381     tcc_add_systemdir(s);
1382 # endif
1383 #else
1384     /* add libc crt1/crti objects */
1385     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1386         !s->nostdlib) {
1387         if (output_type != TCC_OUTPUT_DLL)
1388             tcc_add_crt(s, "crt1.o");
1389         tcc_add_crt(s, "crti.o");
1390     }
1391 #endif
1392     return 0;
1393 }
1394
1395 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1396 {
1397     tcc_free(s->tcc_lib_path);
1398     s->tcc_lib_path = tcc_strdup(path);
1399 }
1400
1401 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1402 #define FD_INVERT 0x0002 /* invert value before storing */
1403
1404 typedef struct FlagDef {
1405     uint16_t offset;
1406     uint16_t flags;
1407     const char *name;
1408 } FlagDef;
1409
1410 static const FlagDef warning_defs[] = {
1411     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1412     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1413     { offsetof(TCCState, warn_error), 0, "error" },
1414     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1415       "implicit-function-declaration" },
1416 };
1417
1418 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1419                     const char *name, int value)
1420 {
1421     int i;
1422     const FlagDef *p;
1423     const char *r;
1424
1425     r = name;
1426     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1427         r += 3;
1428         value = !value;
1429     }
1430     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1431         if (!strcmp(r, p->name))
1432             goto found;
1433     }
1434     return -1;
1435  found:
1436     if (p->flags & FD_INVERT)
1437         value = !value;
1438     *(int *)((uint8_t *)s + p->offset) = value;
1439     return 0;
1440 }
1441
1442 /* set/reset a warning */
1443 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1444 {
1445     int i;
1446     const FlagDef *p;
1447
1448     if (!strcmp(warning_name, "all")) {
1449         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1450             if (p->flags & WD_ALL)
1451                 *(int *)((uint8_t *)s + p->offset) = 1;
1452         }
1453         return 0;
1454     } else {
1455         return set_flag(s, warning_defs, countof(warning_defs),
1456                         warning_name, value);
1457     }
1458 }
1459
1460 static const FlagDef flag_defs[] = {
1461     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1462     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1463     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1464     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1465 };
1466
1467 /* set/reset a flag */
1468 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1469 {
1470     return set_flag(s, flag_defs, countof(flag_defs),
1471                     flag_name, value);
1472 }
1473
1474
1475 static int strstart(const char *val, const char **str)
1476 {
1477     const char *p, *q;
1478     p = *str;
1479     q = val;
1480     while (*q) {
1481         if (*p != *q)
1482             return 0;
1483         p++;
1484         q++;
1485     }
1486     *str = p;
1487     return 1;
1488 }
1489
1490 /* Like strstart, but automatically takes into account that ld options can
1491  *
1492  * - start with double or single dash (e.g. '--soname' or '-soname')
1493  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1494  *   or '-Wl,-soname=x.so')
1495  *
1496  * you provide `val` always in 'option[=]' form (no leading -)
1497  */
1498 static int link_option(const char *str, const char *val, const char **ptr)
1499 {
1500     const char *p, *q;
1501
1502     /* there should be 1 or 2 dashes */
1503     if (*str++ != '-')
1504         return 0;
1505     if (*str == '-')
1506         str++;
1507
1508     /* then str & val should match (potentialy up to '=') */
1509     p = str;
1510     q = val;
1511
1512     while (*q != '\0' && *q != '=') {
1513         if (*p != *q)
1514             return 0;
1515         p++;
1516         q++;
1517     }
1518
1519     /* '=' near eos means ',' or '=' is ok */
1520     if (*q == '=') {
1521         if (*p != ',' && *p != '=')
1522             return 0;
1523         p++;
1524         q++;
1525     }
1526
1527     if (ptr)
1528         *ptr = p;
1529     return 1;
1530 }
1531
1532 static const char *skip_linker_arg(const char **str)
1533 {
1534     const char *s1 = *str;
1535     const char *s2 = strchr(s1, ',');
1536     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1537     return s2;
1538 }
1539
1540 static char *copy_linker_arg(const char *p)
1541 {
1542     const char *q = p;
1543     skip_linker_arg(&q);
1544     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1545 }
1546
1547 /* set linker options */
1548 static int tcc_set_linker(TCCState *s, const char *option)
1549 {
1550     while (option && *option) {
1551
1552         const char *p = option;
1553         char *end = NULL;
1554         int ignoring = 0;
1555
1556         if (link_option(option, "Bsymbolic", &p)) {
1557             s->symbolic = 1;
1558         } else if (link_option(option, "nostdlib", &p)) {
1559             s->nostdlib = 1;
1560         } else if (link_option(option, "fini=", &p)) {
1561             s->fini_symbol = copy_linker_arg(p);
1562             ignoring = 1;
1563         } else if (link_option(option, "image-base=", &p)
1564                 || link_option(option, "Ttext=", &p)) {
1565             s->text_addr = strtoull(p, &end, 16);
1566             s->has_text_addr = 1;
1567         } else if (link_option(option, "init=", &p)) {
1568             s->init_symbol = copy_linker_arg(p);
1569             ignoring = 1;
1570         } else if (link_option(option, "oformat=", &p)) {
1571 #if defined(TCC_TARGET_PE)
1572             if (strstart("pe-", &p)) {
1573 #elif defined(TCC_TARGET_X86_64)
1574             if (strstart("elf64-", &p)) {
1575 #else
1576             if (strstart("elf32-", &p)) {
1577 #endif
1578                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1579             } else if (!strcmp(p, "binary")) {
1580                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1581 #ifdef TCC_TARGET_COFF
1582             } else if (!strcmp(p, "coff")) {
1583                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1584 #endif
1585             } else
1586                 goto err;
1587
1588         } else if (link_option(option, "as-needed", &p)) {
1589             ignoring = 1;
1590         } else if (link_option(option, "O", &p)) {
1591             ignoring = 1;
1592         } else if (link_option(option, "rpath=", &p)) {
1593             s->rpath = copy_linker_arg(p);
1594         } else if (link_option(option, "section-alignment=", &p)) {
1595             s->section_align = strtoul(p, &end, 16);
1596         } else if (link_option(option, "soname=", &p)) {
1597             s->soname = copy_linker_arg(p);
1598 #ifdef TCC_TARGET_PE
1599         } else if (link_option(option, "file-alignment=", &p)) {
1600             s->pe_file_align = strtoul(p, &end, 16);
1601         } else if (link_option(option, "stack=", &p)) {
1602             s->pe_stack_size = strtoul(p, &end, 10);
1603         } else if (link_option(option, "subsystem=", &p)) {
1604 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1605             if (!strcmp(p, "native")) {
1606                 s->pe_subsystem = 1;
1607             } else if (!strcmp(p, "console")) {
1608                 s->pe_subsystem = 3;
1609             } else if (!strcmp(p, "gui")) {
1610                 s->pe_subsystem = 2;
1611             } else if (!strcmp(p, "posix")) {
1612                 s->pe_subsystem = 7;
1613             } else if (!strcmp(p, "efiapp")) {
1614                 s->pe_subsystem = 10;
1615             } else if (!strcmp(p, "efiboot")) {
1616                 s->pe_subsystem = 11;
1617             } else if (!strcmp(p, "efiruntime")) {
1618                 s->pe_subsystem = 12;
1619             } else if (!strcmp(p, "efirom")) {
1620                 s->pe_subsystem = 13;
1621 #elif defined(TCC_TARGET_ARM)
1622             if (!strcmp(p, "wince")) {
1623                 s->pe_subsystem = 9;
1624 #endif
1625             } else
1626                 goto err;
1627 #endif
1628         } else
1629             goto err;
1630
1631         if (ignoring && s->warn_unsupported) err: {
1632             char buf[100], *e;
1633             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1634             if (ignoring)
1635                 tcc_warning("unsupported linker option '%s'", buf);
1636             else
1637                 tcc_error("unsupported linker option '%s'", buf);
1638         }
1639         option = skip_linker_arg(&p);
1640     }
1641     return 0;
1642 }
1643
1644 typedef struct TCCOption {
1645     const char *name;
1646     uint16_t index;
1647     uint16_t flags;
1648 } TCCOption;
1649
1650 enum {
1651     TCC_OPTION_HELP,
1652     TCC_OPTION_I,
1653     TCC_OPTION_D,
1654     TCC_OPTION_U,
1655     TCC_OPTION_L,
1656     TCC_OPTION_B,
1657     TCC_OPTION_l,
1658     TCC_OPTION_bench,
1659     TCC_OPTION_bt,
1660     TCC_OPTION_b,
1661     TCC_OPTION_g,
1662     TCC_OPTION_c,
1663     TCC_OPTION_float_abi,
1664     TCC_OPTION_static,
1665     TCC_OPTION_shared,
1666     TCC_OPTION_soname,
1667     TCC_OPTION_o,
1668     TCC_OPTION_r,
1669     TCC_OPTION_s,
1670     TCC_OPTION_Wl,
1671     TCC_OPTION_W,
1672     TCC_OPTION_O,
1673     TCC_OPTION_m,
1674     TCC_OPTION_f,
1675     TCC_OPTION_isystem,
1676     TCC_OPTION_nostdinc,
1677     TCC_OPTION_nostdlib,
1678     TCC_OPTION_print_search_dirs,
1679     TCC_OPTION_rdynamic,
1680     TCC_OPTION_pedantic,
1681     TCC_OPTION_pthread,
1682     TCC_OPTION_run,
1683     TCC_OPTION_v,
1684     TCC_OPTION_w,
1685     TCC_OPTION_pipe,
1686     TCC_OPTION_E,
1687     TCC_OPTION_MD,
1688     TCC_OPTION_MF,
1689     TCC_OPTION_x,
1690     TCC_OPTION_dumpversion,
1691 };
1692
1693 #define TCC_OPTION_HAS_ARG 0x0001
1694 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1695
1696 static const TCCOption tcc_options[] = {
1697     { "h", TCC_OPTION_HELP, 0 },
1698     { "-help", TCC_OPTION_HELP, 0 },
1699     { "?", TCC_OPTION_HELP, 0 },
1700     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1701     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1702     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1703     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1704     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1705     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1706     { "bench", TCC_OPTION_bench, 0 },
1707 #ifdef CONFIG_TCC_BACKTRACE
1708     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1709 #endif
1710 #ifdef CONFIG_TCC_BCHECK
1711     { "b", TCC_OPTION_b, 0 },
1712 #endif
1713     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1714     { "c", TCC_OPTION_c, 0 },
1715 #ifdef TCC_TARGET_ARM
1716     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1717 #endif
1718     { "static", TCC_OPTION_static, 0 },
1719     { "shared", TCC_OPTION_shared, 0 },
1720     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1721     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1722     { "pedantic", TCC_OPTION_pedantic, 0},
1723     { "pthread", TCC_OPTION_pthread, 0},
1724     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1725     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1726     { "r", TCC_OPTION_r, 0 },
1727     { "s", TCC_OPTION_s, 0 },
1728     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1729     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1730     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1731     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1732     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1733     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1734     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1735     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1736     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1737     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1738     { "w", TCC_OPTION_w, 0 },
1739     { "pipe", TCC_OPTION_pipe, 0},
1740     { "E", TCC_OPTION_E, 0},
1741     { "MD", TCC_OPTION_MD, 0},
1742     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1743     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1744     { "dumpversion", TCC_OPTION_dumpversion, 0},
1745     { NULL, 0, 0 },
1746 };
1747
1748 static void parse_option_D(TCCState *s1, const char *optarg)
1749 {
1750     char *sym = tcc_strdup(optarg);
1751     char *value = strchr(sym, '=');
1752     if (value)
1753         *value++ = '\0';
1754     tcc_define_symbol(s1, sym, value);
1755     tcc_free(sym);
1756 }
1757
1758 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1759 {
1760     const TCCOption *popt;
1761     const char *optarg, *r;
1762     int run = 0;
1763     int pthread = 0;
1764     int optind = 0;
1765
1766     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1767     CString linker_arg;
1768     cstr_new(&linker_arg);
1769
1770     while (optind < argc) {
1771
1772         r = argv[optind++];
1773         if (r[0] != '-' || r[1] == '\0') {
1774             /* add a new file */
1775             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1776             if (run) {
1777                 optind--;
1778                 /* argv[0] will be this file */
1779                 break;
1780             }
1781             continue;
1782         }
1783
1784         /* find option in table */
1785         for(popt = tcc_options; ; ++popt) {
1786             const char *p1 = popt->name;
1787             const char *r1 = r + 1;
1788             if (p1 == NULL)
1789                 tcc_error("invalid option -- '%s'", r);
1790             if (!strstart(p1, &r1))
1791                 continue;
1792             optarg = r1;
1793             if (popt->flags & TCC_OPTION_HAS_ARG) {
1794                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1795                     if (optind >= argc)
1796                         tcc_error("argument to '%s' is missing", r);
1797                     optarg = argv[optind++];
1798                 }
1799             } else if (*r1 != '\0')
1800                 continue;
1801             break;
1802         }
1803
1804         switch(popt->index) {
1805         case TCC_OPTION_HELP:
1806             return 0;
1807         case TCC_OPTION_I:
1808             if (tcc_add_include_path(s, optarg) < 0)
1809                 tcc_error("too many include paths");
1810             break;
1811         case TCC_OPTION_D:
1812             parse_option_D(s, optarg);
1813             break;
1814         case TCC_OPTION_U:
1815             tcc_undefine_symbol(s, optarg);
1816             break;
1817         case TCC_OPTION_L:
1818             tcc_add_library_path(s, optarg);
1819             break;
1820         case TCC_OPTION_B:
1821             /* set tcc utilities path (mainly for tcc development) */
1822             tcc_set_lib_path(s, optarg);
1823             break;
1824         case TCC_OPTION_l:
1825             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1826             s->nb_libraries++;
1827             break;
1828         case TCC_OPTION_pthread:
1829             parse_option_D(s, "_REENTRANT");
1830             pthread = 1;
1831             break;
1832         case TCC_OPTION_bench:
1833             s->do_bench = 1;
1834             break;
1835 #ifdef CONFIG_TCC_BACKTRACE
1836         case TCC_OPTION_bt:
1837             tcc_set_num_callers(atoi(optarg));
1838             break;
1839 #endif
1840 #ifdef CONFIG_TCC_BCHECK
1841         case TCC_OPTION_b:
1842             s->do_bounds_check = 1;
1843             s->do_debug = 1;
1844             break;
1845 #endif
1846         case TCC_OPTION_g:
1847             s->do_debug = 1;
1848             break;
1849         case TCC_OPTION_c:
1850             s->output_type = TCC_OUTPUT_OBJ;
1851             break;
1852 #ifdef TCC_TARGET_ARM
1853         case TCC_OPTION_float_abi:
1854             /* tcc doesn't support soft float yet */
1855             if (!strcmp(optarg, "softfp")) {
1856                 s->float_abi = ARM_SOFTFP_FLOAT;
1857                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1858             } else if (!strcmp(optarg, "hard"))
1859                 s->float_abi = ARM_HARD_FLOAT;
1860             else
1861                 tcc_error("unsupported float abi '%s'", optarg);
1862             break;
1863 #endif
1864         case TCC_OPTION_static:
1865             s->static_link = 1;
1866             break;
1867         case TCC_OPTION_shared:
1868             s->output_type = TCC_OUTPUT_DLL;
1869             break;
1870         case TCC_OPTION_soname:
1871             s->soname = tcc_strdup(optarg);
1872             break;
1873         case TCC_OPTION_m:
1874             s->option_m = tcc_strdup(optarg);
1875             break;
1876         case TCC_OPTION_o:
1877             s->outfile = tcc_strdup(optarg);
1878             break;
1879         case TCC_OPTION_r:
1880             /* generate a .o merging several output files */
1881             s->option_r = 1;
1882             s->output_type = TCC_OUTPUT_OBJ;
1883             break;
1884         case TCC_OPTION_isystem:
1885             tcc_add_sysinclude_path(s, optarg);
1886             break;
1887         case TCC_OPTION_nostdinc:
1888             s->nostdinc = 1;
1889             break;
1890         case TCC_OPTION_nostdlib:
1891             s->nostdlib = 1;
1892             break;
1893         case TCC_OPTION_print_search_dirs:
1894             s->print_search_dirs = 1;
1895             break;
1896         case TCC_OPTION_run:
1897             s->output_type = TCC_OUTPUT_MEMORY;
1898             tcc_set_options(s, optarg);
1899             run = 1;
1900             break;
1901         case TCC_OPTION_v:
1902             do ++s->verbose; while (*optarg++ == 'v');
1903             break;
1904         case TCC_OPTION_f:
1905             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1906                 goto unsupported_option;
1907             break;
1908         case TCC_OPTION_W:
1909             if (tcc_set_warning(s, optarg, 1) < 0 &&
1910                 s->warn_unsupported)
1911                 goto unsupported_option;
1912             break;
1913         case TCC_OPTION_w:
1914             s->warn_none = 1;
1915             break;
1916         case TCC_OPTION_rdynamic:
1917             s->rdynamic = 1;
1918             break;
1919         case TCC_OPTION_Wl:
1920             if (linker_arg.size)
1921                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1922             cstr_cat(&linker_arg, optarg);
1923             cstr_ccat(&linker_arg, '\0');
1924             break;
1925         case TCC_OPTION_E:
1926             s->output_type = TCC_OUTPUT_PREPROCESS;
1927             break;
1928         case TCC_OPTION_MD:
1929             s->gen_deps = 1;
1930             break;
1931         case TCC_OPTION_MF:
1932             s->deps_outfile = tcc_strdup(optarg);
1933             break;
1934         case TCC_OPTION_dumpversion:
1935             printf ("%s\n", TCC_VERSION);
1936             exit(0);
1937         case TCC_OPTION_O:
1938         case TCC_OPTION_pedantic:
1939         case TCC_OPTION_pipe:
1940         case TCC_OPTION_s:
1941         case TCC_OPTION_x:
1942             /* ignored */
1943             break;
1944         default:
1945             if (s->warn_unsupported) {
1946             unsupported_option:
1947                 tcc_warning("unsupported option '%s'", r);
1948             }
1949             break;
1950         }
1951     }
1952
1953     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
1954         tcc_set_options(s, "-lpthread");
1955
1956     tcc_set_linker(s, (const char *)linker_arg.data);
1957     cstr_free(&linker_arg);
1958
1959     return optind;
1960 }
1961
1962 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
1963 {
1964     const char *s1;
1965     char **argv, *arg;
1966     int argc, len;
1967     int ret;
1968
1969     argc = 0, argv = NULL;
1970     for(;;) {
1971         while (is_space(*str))
1972             str++;
1973         if (*str == '\0')
1974             break;
1975         s1 = str;
1976         while (*str != '\0' && !is_space(*str))
1977             str++;
1978         len = str - s1;
1979         arg = tcc_malloc(len + 1);
1980         pstrncpy(arg, s1, len);
1981         dynarray_add((void ***)&argv, &argc, arg);
1982     }
1983     ret = tcc_parse_args(s, argc, argv);
1984     dynarray_reset(&argv, &argc);
1985     return ret;
1986 }
1987
1988 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1989 {
1990     double tt;
1991     tt = (double)total_time / 1000000.0;
1992     if (tt < 0.001)
1993         tt = 0.001;
1994     if (total_bytes < 1)
1995         total_bytes = 1;
1996     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1997            tok_ident - TOK_IDENT, total_lines, total_bytes,
1998            tt, (int)(total_lines / tt),
1999            total_bytes / tt / 1000000.0);
2000 }
2001
2002 PUB_FUNC void tcc_set_environment(TCCState *s)
2003 {
2004     char * path;
2005
2006     path = getenv("C_INCLUDE_PATH");
2007     if(path != NULL) {
2008         tcc_add_include_path(s, path);
2009     }
2010     path = getenv("CPATH");
2011     if(path != NULL) {
2012         tcc_add_include_path(s, path);
2013     }
2014     path = getenv("LIBRARY_PATH");
2015     if(path != NULL) {
2016         tcc_add_library_path(s, path);
2017     }
2018 }