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_ARM64
  49 #include "arm64-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_C67
  52 #include "c67-gen.c"
  53 #endif
  54 #ifdef TCC_TARGET_X86_64
  55 #include "x86_64-gen.c"
  56 #endif
  57 #ifdef CONFIG_TCC_ASM
  58 #include "tccasm.c"
  59 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  60 #include "i386-asm.c"
  61 #endif
  62 #endif
  63 #ifdef TCC_TARGET_COFF
  64 #include "tcccoff.c"
  65 #endif
  66 #ifdef TCC_TARGET_PE
  67 #include "tccpe.c"
  68 #endif
  69 #endif /* ONE_SOURCE */
  70
  71 /********************************************************/
  72 #ifndef CONFIG_TCC_ASM
  73 ST_FUNC void asm_instr(void)
  74 {
  75     tcc_error("inline asm() not supported");
  76 }
  77 ST_FUNC void asm_global_instr(void)
  78 {
  79     tcc_error("inline asm() not supported");
  80 }
  81 #endif
  82
  83 /********************************************************/
  84 #ifdef _WIN32
  85 static char *normalize_slashes(char *path)
  86 {
  87     char *p;
  88     for (p = path; *p; ++p)
  89         if (*p == '\\')
  90             *p = '/';
  91     return path;
  92 }
  93
  94 static HMODULE tcc_module;
  95
  96 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  97 static void tcc_set_lib_path_w32(TCCState *s)
  98 {
  99     char path[1024], *p;
 100     GetModuleFileNameA(tcc_module, path, sizeof path);
 101     p = tcc_basename(normalize_slashes(strlwr(path)));
 102     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 103         p -= 5;
 104     else if (p > path)
 105         p--;
 106     *p = 0;
 107     tcc_set_lib_path(s, path);
 108 }
 109
 110 #ifdef TCC_TARGET_PE
 111 static void tcc_add_systemdir(TCCState *s)
 112 {
 113     char buf[1000];
 114     GetSystemDirectory(buf, sizeof buf);
 115     tcc_add_library_path(s, normalize_slashes(buf));
 116 }
 117 #endif
 118
 119 #ifndef CONFIG_TCC_STATIC
 120 void dlclose(void *p)
 121 {
 122     FreeLibrary((HMODULE)p);
 123 }
 124 #endif
 125
 126 #ifdef LIBTCC_AS_DLL
 127 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 128 {
 129     if (DLL_PROCESS_ATTACH == dwReason)
 130         tcc_module = hDll;
 131     return TRUE;
 132 }
 133 #endif
 134 #endif
 135
 136 /********************************************************/
 137 /* copy a string and truncate it. */
 138 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 139 {
 140     char *q, *q_end;
 141     int c;
 142
 143     if (buf_size > 0) {
 144         q = buf;
 145         q_end = buf + buf_size - 1;
 146         while (q < q_end) {
 147             c = *s++;
 148             if (c == '\0')
 149                 break;
 150             *q++ = c;
 151         }
 152         *q = '\0';
 153     }
 154     return buf;
 155 }
 156
 157 /* strcat and truncate. */
 158 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 159 {
 160     int len;
 161     len = strlen(buf);
 162     if (len < buf_size)
 163         pstrcpy(buf + len, buf_size - len, s);
 164     return buf;
 165 }
 166
 167 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 168 {
 169     memcpy(out, in, num);
 170     out[num] = '\0';
 171     return out;
 172 }
 173
 174 /* extract the basename of a file */
 175 PUB_FUNC char *tcc_basename(const char *name)
 176 {
 177     char *p = strchr(name, 0);
 178     while (p > name && !IS_DIRSEP(p[-1]))
 179         --p;
 180     return p;
 181 }
 182
 183 /* extract extension part of a file
 184  *
 185  * (if no extension, return pointer to end-of-string)
 186  */
 187 PUB_FUNC char *tcc_fileextension (const char *name)
 188 {
 189     char *b = tcc_basename(name);
 190     char *e = strrchr(b, '.');
 191     return e ? e : strchr(b, 0);
 192 }
 193
 194 /********************************************************/
 195 /* memory management */
 196
 197 #undef free
 198 #undef malloc
 199 #undef realloc
 200
 201 #ifdef MEM_DEBUG
 202 ST_DATA int mem_cur_size;
 203 ST_DATA int mem_max_size;
 204 unsigned malloc_usable_size(void*);
 205 #endif
 206
 207 PUB_FUNC void tcc_free(void *ptr)
 208 {
 209 #ifdef MEM_DEBUG
 210     mem_cur_size -= malloc_usable_size(ptr);
 211 #endif
 212     free(ptr);
 213 }
 214
 215 PUB_FUNC void *tcc_malloc(unsigned long size)
 216 {
 217     void *ptr;
 218     ptr = malloc(size);
 219     if (!ptr && size)
 220         tcc_error("memory full (malloc)");
 221 #ifdef MEM_DEBUG
 222     mem_cur_size += malloc_usable_size(ptr);
 223     if (mem_cur_size > mem_max_size)
 224         mem_max_size = mem_cur_size;
 225 #endif
 226     return ptr;
 227 }
 228
 229 PUB_FUNC void *tcc_mallocz(unsigned long size)
 230 {
 231     void *ptr;
 232     ptr = tcc_malloc(size);
 233     memset(ptr, 0, size);
 234     return ptr;
 235 }
 236
 237 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 238 {
 239     void *ptr1;
 240 #ifdef MEM_DEBUG
 241     mem_cur_size -= malloc_usable_size(ptr);
 242 #endif
 243     ptr1 = realloc(ptr, size);
 244     if (!ptr1 && size)
 245         tcc_error("memory full (realloc)");
 246 #ifdef MEM_DEBUG
 247     /* NOTE: count not correct if alloc error, but not critical */
 248     mem_cur_size += malloc_usable_size(ptr1);
 249     if (mem_cur_size > mem_max_size)
 250         mem_max_size = mem_cur_size;
 251 #endif
 252     return ptr1;
 253 }
 254
 255 PUB_FUNC char *tcc_strdup(const char *str)
 256 {
 257     char *ptr;
 258     ptr = tcc_malloc(strlen(str) + 1);
 259     strcpy(ptr, str);
 260     return ptr;
 261 }
 262
 263 PUB_FUNC void tcc_memstats(void)
 264 {
 265 #ifdef MEM_DEBUG
 266     printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 267 #endif
 268 }
 269
 270 #define free(p) use_tcc_free(p)
 271 #define malloc(s) use_tcc_malloc(s)
 272 #define realloc(p, s) use_tcc_realloc(p, s)
 273
 274 /********************************************************/
 275 /* dynarrays */
 276
 277 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 278 {
 279     int nb, nb_alloc;
 280     void **pp;
 281
 282     nb = *nb_ptr;
 283     pp = *ptab;
 284     /* every power of two we double array size */
 285     if ((nb & (nb - 1)) == 0) {
 286         if (!nb)
 287             nb_alloc = 1;
 288         else
 289             nb_alloc = nb * 2;
 290         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 291         *ptab = pp;
 292     }
 293     pp[nb++] = data;
 294     *nb_ptr = nb;
 295 }
 296
 297 ST_FUNC void dynarray_reset(void *pp, int *n)
 298 {
 299     void **p;
 300     for (p = *(void***)pp; *n; ++p, --*n)
 301         if (*p)
 302             tcc_free(*p);
 303     tcc_free(*(void**)pp);
 304     *(void**)pp = NULL;
 305 }
 306
 307 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 308 {
 309     const char *p;
 310     do {
 311         int c;
 312         CString str;
 313
 314         cstr_new(&str);
 315         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 316             if (c == '{' && p[1] && p[2] == '}') {
 317                 c = p[1], p += 2;
 318                 if (c == 'B')
 319                     cstr_cat(&str, s->tcc_lib_path);
 320             } else {
 321                 cstr_ccat(&str, c);
 322             }
 323         }
 324         cstr_ccat(&str, '\0');
 325         dynarray_add(p_ary, p_nb_ary, str.data);
 326         in = p+1;
 327     } while (*p);
 328 }
 329
 330 /********************************************************/
 331
 332 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 333 {
 334     Section *sec;
 335
 336     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 337     strcpy(sec->name, name);
 338     sec->sh_type = sh_type;
 339     sec->sh_flags = sh_flags;
 340     switch(sh_type) {
 341     case SHT_HASH:
 342     case SHT_REL:
 343     case SHT_RELA:
 344     case SHT_DYNSYM:
 345     case SHT_SYMTAB:
 346     case SHT_DYNAMIC:
 347         sec->sh_addralign = 4;
 348         break;
 349     case SHT_STRTAB:
 350         sec->sh_addralign = 1;
 351         break;
 352     default:
 353         sec->sh_addralign = 32; /* default conservative alignment */
 354         break;
 355     }
 356
 357     if (sh_flags & SHF_PRIVATE) {
 358         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 359     } else {
 360         sec->sh_num = s1->nb_sections;
 361         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 362     }
 363
 364     return sec;
 365 }
 366
 367 static void free_section(Section *s)
 368 {
 369     tcc_free(s->data);
 370 }
 371
 372 /* realloc section and set its content to zero */
 373 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 374 {
 375     unsigned long size;
 376     unsigned char *data;
 377
 378     size = sec->data_allocated;
 379     if (size == 0)
 380         size = 1;
 381     while (size < new_size)
 382         size = size * 2;
 383     data = tcc_realloc(sec->data, size);
 384     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 385     sec->data = data;
 386     sec->data_allocated = size;
 387 }
 388
 389 /* reserve at least 'size' bytes in section 'sec' from
 390    sec->data_offset. */
 391 ST_FUNC void *section_ptr_add(Section *sec, addr_t size)
 392 {
 393     size_t offset, offset1;
 394
 395     offset = sec->data_offset;
 396     offset1 = offset + size;
 397     if (offset1 > sec->data_allocated)
 398         section_realloc(sec, offset1);
 399     sec->data_offset = offset1;
 400     return sec->data + offset;
 401 }
 402
 403 /* reserve at least 'size' bytes from section start */
 404 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 405 {
 406     if (size > sec->data_allocated)
 407         section_realloc(sec, size);
 408     if (size > sec->data_offset)
 409         sec->data_offset = size;
 410 }
 411
 412 /* return a reference to a section, and create it if it does not
 413    exists */
 414 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 415 {
 416     Section *sec;
 417     int i;
 418     for(i = 1; i < s1->nb_sections; i++) {
 419         sec = s1->sections[i];
 420         if (!strcmp(name, sec->name))
 421             return sec;
 422     }
 423     /* sections are created as PROGBITS */
 424     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 425 }
 426
 427 /* update sym->c so that it points to an external symbol in section
 428    'section' with value 'value' */
 429 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 430                             addr_t value, unsigned long size,
 431                             int can_add_underscore)
 432 {
 433     int sym_type, sym_bind, sh_num, info, other;
 434     ElfW(Sym) *esym;
 435     const char *name;
 436     char buf1[256];
 437
 438 #ifdef CONFIG_TCC_BCHECK
 439     char buf[32];
 440 #endif
 441
 442     if (section == NULL)
 443         sh_num = SHN_UNDEF;
 444     else if (section == SECTION_ABS)
 445         sh_num = SHN_ABS;
 446     else
 447         sh_num = section->sh_num;
 448
 449     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 450         sym_type = STT_FUNC;
 451     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 452         sym_type = STT_NOTYPE;
 453     } else {
 454         sym_type = STT_OBJECT;
 455     }
 456
 457     if (sym->type.t & VT_STATIC)
 458         sym_bind = STB_LOCAL;
 459     else {
 460         if (sym->type.t & VT_WEAK)
 461             sym_bind = STB_WEAK;
 462         else
 463             sym_bind = STB_GLOBAL;
 464     }
 465
 466     if (!sym->c) {
 467         name = get_tok_str(sym->v, NULL);
 468 #ifdef CONFIG_TCC_BCHECK
 469         if (tcc_state->do_bounds_check) {
 470             /* XXX: avoid doing that for statics ? */
 471             /* if bound checking is activated, we change some function
 472                names by adding the "__bound" prefix */
 473             switch(sym->v) {
 474 #ifdef TCC_TARGET_PE
 475             /* XXX: we rely only on malloc hooks */
 476             case TOK_malloc:
 477             case TOK_free:
 478             case TOK_realloc:
 479             case TOK_memalign:
 480             case TOK_calloc:
 481 #endif
 482             case TOK_memcpy:
 483             case TOK_memmove:
 484             case TOK_memset:
 485             case TOK_strlen:
 486             case TOK_strcpy:
 487             case TOK_alloca:
 488                 strcpy(buf, "__bound_");
 489                 strcat(buf, name);
 490                 name = buf;
 491                 break;
 492             }
 493         }
 494 #endif
 495         other = 0;
 496
 497 #ifdef TCC_TARGET_PE
 498         if (sym->type.t & VT_EXPORT)
 499             other |= ST_PE_EXPORT;
 500         if (sym_type == STT_FUNC && sym->type.ref) {
 501             Sym *ref = sym->type.ref;
 502             if (ref->a.func_export)
 503                 other |= ST_PE_EXPORT;
 504             if (ref->a.func_call == FUNC_STDCALL && can_add_underscore) {
 505                 sprintf(buf1, "_%s@%d", name, ref->a.func_args * PTR_SIZE);
 506                 name = buf1;
 507                 other |= ST_PE_STDCALL;
 508                 can_add_underscore = 0;
 509             }
 510         } else {
 511             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 512                 other |= ST_PE_IMPORT;
 513             if (sym->type.t & VT_IMPORT)
 514                 other |= ST_PE_IMPORT;
 515         }
 516 #else
 517         if (! (sym->type.t & VT_STATIC))
 518             other = (sym->type.t & VT_VIS_MASK) >> VT_VIS_SHIFT;
 519 #endif
 520         if (tcc_state->leading_underscore && can_add_underscore) {
 521             buf1[0] = '_';
 522             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 523             name = buf1;
 524         }
 525         if (sym->asm_label) {
 526             name = sym->asm_label;
 527         }
 528         info = ELFW(ST_INFO)(sym_bind, sym_type);
 529         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 530     } else {
 531         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 532         esym->st_value = value;
 533         esym->st_size = size;
 534         esym->st_shndx = sh_num;
 535     }
 536 }
 537
 538 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 539                            addr_t value, unsigned long size)
 540 {
 541     put_extern_sym2(sym, section, value, size, 1);
 542 }
 543
 544 /* add a new relocation entry to symbol 'sym' in section 's' */
 545 ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type,
 546                      addr_t addend)
 547 {
 548     int c = 0;
 549     if (sym) {
 550         if (0 == sym->c)
 551             put_extern_sym(sym, NULL, 0, 0);
 552         c = sym->c;
 553     }
 554     /* now we can add ELF relocation info */
 555     put_elf_reloca(symtab_section, s, offset, type, c, addend);
 556 }
 557
 558 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 559 {
 560     greloca(s, sym, offset, type, 0);
 561 }
 562
 563 /********************************************************/
 564
 565 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 566 {
 567     int len;
 568     len = strlen(buf);
 569     vsnprintf(buf + len, buf_size - len, fmt, ap);
 570 }
 571
 572 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 573 {
 574     va_list ap;
 575     va_start(ap, fmt);
 576     strcat_vprintf(buf, buf_size, fmt, ap);
 577     va_end(ap);
 578 }
 579
 580 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 581 {
 582     char buf[2048];
 583     BufferedFile **pf, *f;
 584
 585     buf[0] = '\0';
 586     /* use upper file if inline ":asm:" or token ":paste:" */
 587     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 588      ;
 589     if (f) {
 590         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 591             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 592                 (*pf)->filename, (*pf)->line_num);
 593         if (f->line_num > 0) {
 594             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 595                 f->filename, f->line_num);
 596         } else {
 597             strcat_printf(buf, sizeof(buf), "%s: ",
 598                 f->filename);
 599         }
 600     } else {
 601         strcat_printf(buf, sizeof(buf), "tcc: ");
 602     }
 603     if (is_warning)
 604         strcat_printf(buf, sizeof(buf), "warning: ");
 605     else
 606         strcat_printf(buf, sizeof(buf), "error: ");
 607     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 608
 609     if (!s1->error_func) {
 610         /* default case: stderr */
 611         if (s1->ppfp) /* print a newline during tcc -E */
 612             fprintf(s1->ppfp, "\n"), fflush(s1->ppfp);
 613         fprintf(stderr, "%s\n", buf);
 614         fflush(stderr); /* print error/warning now (win32) */
 615     } else {
 616         s1->error_func(s1->error_opaque, buf);
 617     }
 618     if (!is_warning || s1->warn_error)
 619         s1->nb_errors++;
 620 }
 621
 622 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 623                         void (*error_func)(void *opaque, const char *msg))
 624 {
 625     s->error_opaque = error_opaque;
 626     s->error_func = error_func;
 627 }
 628
 629 /* error without aborting current compilation */
 630 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 631 {
 632     TCCState *s1 = tcc_state;
 633     va_list ap;
 634
 635     va_start(ap, fmt);
 636     error1(s1, 0, fmt, ap);
 637     va_end(ap);
 638 }
 639
 640 PUB_FUNC void tcc_error(const char *fmt, ...)
 641 {
 642     TCCState *s1 = tcc_state;
 643     va_list ap;
 644
 645     va_start(ap, fmt);
 646     error1(s1, 0, fmt, ap);
 647     va_end(ap);
 648     /* better than nothing: in some cases, we accept to handle errors */
 649     if (s1->error_set_jmp_enabled) {
 650         longjmp(s1->error_jmp_buf, 1);
 651     } else {
 652         /* XXX: eliminate this someday */
 653         exit(1);
 654     }
 655 }
 656
 657 PUB_FUNC void tcc_warning(const char *fmt, ...)
 658 {
 659     TCCState *s1 = tcc_state;
 660     va_list ap;
 661
 662     if (s1->warn_none)
 663         return;
 664
 665     va_start(ap, fmt);
 666     error1(s1, 1, fmt, ap);
 667     va_end(ap);
 668 }
 669
 670 /********************************************************/
 671 /* I/O layer */
 672
 673 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 674 {
 675     BufferedFile *bf;
 676     int buflen = initlen ? initlen : IO_BUF_SIZE;
 677
 678     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 679     bf->buf_ptr = bf->buffer;
 680     bf->buf_end = bf->buffer + initlen;
 681     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 682     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 683 #ifdef _WIN32
 684     normalize_slashes(bf->filename);
 685 #endif
 686     bf->line_num = 1;
 687     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 688     bf->fd = -1;
 689     bf->prev = file;
 690     file = bf;
 691 }
 692
 693 ST_FUNC void tcc_close(void)
 694 {
 695     BufferedFile *bf = file;
 696     if (bf->fd > 0) {
 697         close(bf->fd);
 698         total_lines += bf->line_num;
 699     }
 700     file = bf->prev;
 701     tcc_free(bf);
 702 }
 703
 704 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 705 {
 706     int fd;
 707     if (strcmp(filename, "-") == 0)
 708         fd = 0, filename = "<stdin>";
 709     else
 710         fd = open(filename, O_RDONLY | O_BINARY);
 711     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 712         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 713                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 714     if (fd < 0)
 715         return -1;
 716
 717     tcc_open_bf(s1, filename, 0);
 718     file->fd = fd;
 719     return fd;
 720 }
 721
 722 /* compile the C file opened in 'file'. Return non zero if errors. */
 723 static int tcc_compile(TCCState *s1)
 724 {
 725     Sym *define_start;
 726     char buf[512];
 727     volatile int section_sym;
 728
 729 #ifdef INC_DEBUG
 730     printf("%s: **** new file\n", file->filename);
 731 #endif
 732     preprocess_init(s1);
 733
 734     cur_text_section = NULL;
 735     funcname = "";
 736     anon_sym = SYM_FIRST_ANOM;
 737
 738     /* file info: full path + filename */
 739     section_sym = 0; /* avoid warning */
 740     if (s1->do_debug) {
 741         section_sym = put_elf_sym(symtab_section, 0, 0,
 742                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 743                                   text_section->sh_num, NULL);
 744         getcwd(buf, sizeof(buf));
 745 #ifdef _WIN32
 746         normalize_slashes(buf);
 747 #endif
 748         pstrcat(buf, sizeof(buf), "/");
 749         put_stabs_r(buf, N_SO, 0, 0,
 750                     text_section->data_offset, text_section, section_sym);
 751         put_stabs_r(file->filename, N_SO, 0, 0,
 752                     text_section->data_offset, text_section, section_sym);
 753     }
 754     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 755        symbols can be safely used */
 756     put_elf_sym(symtab_section, 0, 0,
 757                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 758                 SHN_ABS, file->filename);
 759
 760     /* define some often used types */
 761     int_type.t = VT_INT;
 762
 763     char_pointer_type.t = VT_BYTE;
 764     mk_pointer(&char_pointer_type);
 765
 766 #if PTR_SIZE == 4
 767     size_type.t = VT_INT;
 768 #else
 769     size_type.t = VT_LLONG;
 770 #endif
 771
 772     func_old_type.t = VT_FUNC;
 773     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 774 #ifdef TCC_TARGET_ARM
 775     arm_init(s1);
 776 #endif
 777
 778 #if 0
 779     /* define 'void *alloca(unsigned int)' builtin function */
 780     {
 781         Sym *s1;
 782
 783         p = anon_sym++;
 784         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 785         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 786         s1->next = NULL;
 787         sym->next = s1;
 788         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 789     }
 790 #endif
 791
 792     define_start = define_stack;
 793     nocode_wanted = 1;
 794
 795     if (setjmp(s1->error_jmp_buf) == 0) {
 796         s1->nb_errors = 0;
 797         s1->error_set_jmp_enabled = 1;
 798
 799         ch = file->buf_ptr[0];
 800         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 801         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
 802         next();
 803         decl(VT_CONST);
 804         if (tok != TOK_EOF)
 805             expect("declaration");
 806         check_vstack();
 807
 808         /* end of translation unit info */
 809         if (s1->do_debug) {
 810             put_stabs_r(NULL, N_SO, 0, 0,
 811                         text_section->data_offset, text_section, section_sym);
 812         }
 813     }
 814
 815     s1->error_set_jmp_enabled = 0;
 816
 817     /* reset define stack, but leave -Dsymbols (may be incorrect if
 818        they are undefined) */
 819     free_defines(define_start);
 820
 821     gen_inline_functions();
 822
 823     sym_pop(&global_stack, NULL);
 824     sym_pop(&local_stack, NULL);
 825
 826     return s1->nb_errors != 0 ? -1 : 0;
 827 }
 828
 829 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 830 {
 831     int len, ret;
 832
 833     len = strlen(str);
 834     tcc_open_bf(s, "<string>", len);
 835     memcpy(file->buffer, str, len);
 836     ret = tcc_compile(s);
 837     tcc_close();
 838     return ret;
 839 }
 840
 841 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 842 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 843 {
 844     int len1, len2;
 845     /* default value */
 846     if (!value)
 847         value = "1";
 848     len1 = strlen(sym);
 849     len2 = strlen(value);
 850
 851     /* init file structure */
 852     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 853     memcpy(file->buffer, sym, len1);
 854     file->buffer[len1] = ' ';
 855     memcpy(file->buffer + len1 + 1, value, len2);
 856
 857     /* parse with define parser */
 858     ch = file->buf_ptr[0];
 859     next_nomacro();
 860     parse_define();
 861
 862     tcc_close();
 863 }
 864
 865 /* undefine a preprocessor symbol */
 866 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 867 {
 868     TokenSym *ts;
 869     Sym *s;
 870     ts = tok_alloc(sym, strlen(sym));
 871     s = define_find(ts->tok);
 872     /* undefine symbol by putting an invalid name */
 873     if (s)
 874         define_undef(s);
 875 }
 876
 877 /* cleanup all static data used during compilation */
 878 static void tcc_cleanup(void)
 879 {
 880     if (NULL == tcc_state)
 881         return;
 882     tcc_state = NULL;
 883
 884     preprocess_delete();
 885
 886     /* free sym_pools */
 887     dynarray_reset(&sym_pools, &nb_sym_pools);
 888     /* string buffer */
 889     cstr_free(&tokcstr);
 890     /* reset symbol stack */
 891     sym_free_first = NULL;
 892 }
 893
 894 LIBTCCAPI TCCState *tcc_new(void)
 895 {
 896     TCCState *s;
 897     char buffer[100];
 898     int a,b,c;
 899
 900     tcc_cleanup();
 901
 902     s = tcc_mallocz(sizeof(TCCState));
 903     if (!s)
 904         return NULL;
 905     tcc_state = s;
 906 #ifdef _WIN32
 907     tcc_set_lib_path_w32(s);
 908 #else
 909     tcc_set_lib_path(s, CONFIG_TCCDIR);
 910 #endif
 911     s->output_type = 0;
 912     preprocess_new();
 913     s->include_stack_ptr = s->include_stack;
 914
 915     /* we add dummy defines for some special macros to speed up tests
 916        and to have working defined() */
 917     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 918     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 919     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 920     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 921
 922     /* define __TINYC__ 92X  */
 923     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 924     sprintf(buffer, "%d", a*10000 + b*100 + c);
 925     tcc_define_symbol(s, "__TINYC__", buffer);
 926
 927     /* standard defines */
 928     tcc_define_symbol(s, "__STDC__", NULL);
 929     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 930     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 931
 932     /* target defines */
 933 #if defined(TCC_TARGET_I386)
 934     tcc_define_symbol(s, "__i386__", NULL);
 935     tcc_define_symbol(s, "__i386", NULL);
 936     tcc_define_symbol(s, "i386", NULL);
 937 #elif defined(TCC_TARGET_X86_64)
 938     tcc_define_symbol(s, "__x86_64__", NULL);
 939 #elif defined(TCC_TARGET_ARM)
 940     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 941     tcc_define_symbol(s, "__arm_elf__", NULL);
 942     tcc_define_symbol(s, "__arm_elf", NULL);
 943     tcc_define_symbol(s, "arm_elf", NULL);
 944     tcc_define_symbol(s, "__arm__", NULL);
 945     tcc_define_symbol(s, "__arm", NULL);
 946     tcc_define_symbol(s, "arm", NULL);
 947     tcc_define_symbol(s, "__APCS_32__", NULL);
 948     tcc_define_symbol(s, "__ARMEL__", NULL);
 949 #if defined(TCC_ARM_EABI)
 950     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 951 #endif
 952 #if defined(TCC_ARM_HARDFLOAT)
 953     s->float_abi = ARM_HARD_FLOAT;
 954     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 955 #else
 956     s->float_abi = ARM_SOFTFP_FLOAT;
 957 #endif
 958 #elif defined(TCC_TARGET_ARM64)
 959     tcc_define_symbol(s, "__aarch64__", NULL);
 960 #endif
 961
 962 #ifdef TCC_TARGET_PE
 963     tcc_define_symbol(s, "_WIN32", NULL);
 964 # ifdef TCC_TARGET_X86_64
 965     tcc_define_symbol(s, "_WIN64", NULL);
 966 # endif
 967 #else
 968     tcc_define_symbol(s, "__unix__", NULL);
 969     tcc_define_symbol(s, "__unix", NULL);
 970     tcc_define_symbol(s, "unix", NULL);
 971 # if defined(__linux)
 972     tcc_define_symbol(s, "__linux__", NULL);
 973     tcc_define_symbol(s, "__linux", NULL);
 974 # endif
 975 # if defined(__FreeBSD__)
 976 #  define str(s) #s
 977     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 978 #  undef str
 979 # endif
 980 # if defined(__FreeBSD_kernel__)
 981     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 982 # endif
 983 #endif
 984
 985     /* TinyCC & gcc defines */
 986 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 987     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 988     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 989 #else
 990     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 991     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 992 #endif
 993
 994 #ifdef TCC_TARGET_PE
 995     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 996     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 997 #else
 998     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 999     /* wint_t is unsigned int by default, but (signed) int on BSDs
1000        and unsigned short on windows.  Other OSes might have still
1001        other conventions, sigh.  */
1002 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
1003     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1004 #else
1005     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1006 #endif
1007 #endif
1008
1009 #ifndef TCC_TARGET_PE
1010     /* glibc defines */
1011     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1012     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1013     /* paths for crt objects */
1014     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1015 #endif
1016
1017     /* no section zero */
1018     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1019
1020     /* create standard sections */
1021     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1022     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1023     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1024
1025     /* symbols are always generated for linking stage */
1026     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1027                                 ".strtab",
1028                                 ".hashtab", SHF_PRIVATE);
1029     strtab_section = symtab_section->link;
1030     s->symtab = symtab_section;
1031
1032     /* private symbol table for dynamic symbols */
1033     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1034                                       ".dynstrtab",
1035                                       ".dynhashtab", SHF_PRIVATE);
1036     s->alacarte_link = 1;
1037     s->nocommon = 1;
1038     s->warn_implicit_function_declaration = 1;
1039
1040 #ifdef CHAR_IS_UNSIGNED
1041     s->char_is_unsigned = 1;
1042 #endif
1043     /* enable this if you want symbols with leading underscore on windows: */
1044 #if 0 /* def TCC_TARGET_PE */
1045     s->leading_underscore = 1;
1046 #endif
1047 #ifdef TCC_TARGET_I386
1048     s->seg_size = 32;
1049 #endif
1050 #ifdef TCC_IS_NATIVE
1051     s->runtime_main = "main";
1052 #endif
1053     return s;
1054 }
1055
1056 LIBTCCAPI void tcc_delete(TCCState *s1)
1057 {
1058     int i;
1059
1060     tcc_cleanup();
1061
1062     /* free all sections */
1063     for(i = 1; i < s1->nb_sections; i++)
1064         free_section(s1->sections[i]);
1065     dynarray_reset(&s1->sections, &s1->nb_sections);
1066
1067     for(i = 0; i < s1->nb_priv_sections; i++)
1068         free_section(s1->priv_sections[i]);
1069     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1070
1071     /* free any loaded DLLs */
1072 #ifdef TCC_IS_NATIVE
1073     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1074         DLLReference *ref = s1->loaded_dlls[i];
1075         if ( ref->handle )
1076             dlclose(ref->handle);
1077     }
1078 #endif
1079
1080     /* free loaded dlls array */
1081     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1082
1083     /* free library paths */
1084     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1085     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1086
1087     /* free include paths */
1088     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1089     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1090     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1091
1092     tcc_free(s1->tcc_lib_path);
1093     tcc_free(s1->soname);
1094     tcc_free(s1->rpath);
1095     tcc_free(s1->init_symbol);
1096     tcc_free(s1->fini_symbol);
1097     tcc_free(s1->outfile);
1098     tcc_free(s1->deps_outfile);
1099     dynarray_reset(&s1->files, &s1->nb_files);
1100     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1101     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
1102
1103 #ifdef TCC_IS_NATIVE
1104 # ifdef HAVE_SELINUX
1105     munmap (s1->write_mem, s1->mem_size);
1106     munmap (s1->runtime_mem, s1->mem_size);
1107 # else
1108     tcc_free(s1->runtime_mem);
1109 # endif
1110 #endif
1111
1112     tcc_free(s1->sym_attrs);
1113     tcc_free(s1);
1114 }
1115
1116 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1117 {
1118     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1119     return 0;
1120 }
1121
1122 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1123 {
1124     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1125     return 0;
1126 }
1127
1128 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags, int filetype)
1129 {
1130     ElfW(Ehdr) ehdr;
1131     int fd, ret, size;
1132
1133     parse_flags = 0;
1134 #ifdef CONFIG_TCC_ASM
1135     /* if .S file, define __ASSEMBLER__ like gcc does */
1136     if ((filetype == TCC_FILETYPE_ASM) || (filetype == TCC_FILETYPE_ASM_PP)) {
1137         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1138         parse_flags = PARSE_FLAG_ASM_FILE;
1139     }
1140 #endif
1141
1142     /* open the file */
1143     ret = tcc_open(s1, filename);
1144     if (ret < 0) {
1145         if (flags & AFF_PRINT_ERROR)
1146             tcc_error_noabort("file '%s' not found", filename);
1147         return ret;
1148     }
1149
1150     /* update target deps */
1151     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1152             tcc_strdup(filename));
1153
1154     if (flags & AFF_PREPROCESS) {
1155         ret = tcc_preprocess(s1);
1156         goto the_end;
1157     }
1158
1159     if (filetype == TCC_FILETYPE_C) {
1160         /* C file assumed */
1161         ret = tcc_compile(s1);
1162         goto the_end;
1163     }
1164
1165 #ifdef CONFIG_TCC_ASM
1166     if (filetype == TCC_FILETYPE_ASM_PP) {
1167         /* non preprocessed assembler */
1168         ret = tcc_assemble(s1, 1);
1169         goto the_end;
1170     }
1171
1172     if (filetype == TCC_FILETYPE_ASM) {
1173         /* preprocessed assembler */
1174         ret = tcc_assemble(s1, 0);
1175         goto the_end;
1176     }
1177 #endif
1178
1179     fd = file->fd;
1180     /* assume executable format: auto guess file type */
1181     size = read(fd, &ehdr, sizeof(ehdr));
1182     lseek(fd, 0, SEEK_SET);
1183     if (size <= 0) {
1184         tcc_error_noabort("could not read header");
1185         goto the_end;
1186     }
1187
1188     if (size == sizeof(ehdr) &&
1189         ehdr.e_ident[0] == ELFMAG0 &&
1190         ehdr.e_ident[1] == ELFMAG1 &&
1191         ehdr.e_ident[2] == ELFMAG2 &&
1192         ehdr.e_ident[3] == ELFMAG3) {
1193
1194         /* do not display line number if error */
1195         file->line_num = 0;
1196         if (ehdr.e_type == ET_REL) {
1197             ret = tcc_load_object_file(s1, fd, 0);
1198             goto the_end;
1199
1200         }
1201 #ifndef TCC_TARGET_PE
1202         if (ehdr.e_type == ET_DYN) {
1203             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1204 #ifdef TCC_IS_NATIVE
1205                 void *h;
1206                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1207                 if (h)
1208 #endif
1209                     ret = 0;
1210             } else {
1211                 ret = tcc_load_dll(s1, fd, filename,
1212                                    (flags & AFF_REFERENCED_DLL) != 0);
1213             }
1214             goto the_end;
1215         }
1216 #endif
1217         tcc_error_noabort("unrecognized ELF file");
1218         goto the_end;
1219     }
1220
1221     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1222         file->line_num = 0; /* do not display line number if error */
1223         ret = tcc_load_archive(s1, fd);
1224         goto the_end;
1225     }
1226
1227 #ifdef TCC_TARGET_COFF
1228     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1229         ret = tcc_load_coff(s1, fd);
1230         goto the_end;
1231     }
1232 #endif
1233
1234 #ifdef TCC_TARGET_PE
1235     ret = pe_load_file(s1, filename, fd);
1236 #else
1237     /* as GNU ld, consider it is an ld script if not recognized */
1238     ret = tcc_load_ldscript(s1);
1239 #endif
1240     if (ret < 0)
1241         tcc_error_noabort("unrecognized file type");
1242
1243 the_end:
1244     tcc_close();
1245     return ret;
1246 }
1247
1248 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename, int filetype)
1249 {
1250     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1251         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS, filetype);
1252     else
1253         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR, filetype);
1254 }
1255
1256 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1257 {
1258     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1259     return 0;
1260 }
1261
1262 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1263     const char *filename, int flags, char **paths, int nb_paths)
1264 {
1265     char buf[1024];
1266     int i;
1267
1268     for(i = 0; i < nb_paths; i++) {
1269         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1270         if (tcc_add_file_internal(s, buf, flags, TCC_FILETYPE_BINARY) == 0)
1271             return 0;
1272     }
1273     return -1;
1274 }
1275
1276 /* find and load a dll. Return non zero if not found */
1277 /* XXX: add '-rpath' option support ? */
1278 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1279 {
1280     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1281         s->library_paths, s->nb_library_paths);
1282 }
1283
1284 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1285 {
1286     if (-1 == tcc_add_library_internal(s, "%s/%s",
1287         filename, 0, s->crt_paths, s->nb_crt_paths))
1288         tcc_error_noabort("file '%s' not found", filename);
1289     return 0;
1290 }
1291
1292 /* the library name is the same as the argument of the '-l' option */
1293 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1294 {
1295 #ifdef TCC_TARGET_PE
1296     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1297     const char **pp = s->static_link ? libs + 4 : libs;
1298 #else
1299     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1300     const char **pp = s->static_link ? libs + 1 : libs;
1301 #endif
1302     while (*pp) {
1303         if (0 == tcc_add_library_internal(s, *pp,
1304             libraryname, 0, s->library_paths, s->nb_library_paths))
1305             return 0;
1306         ++pp;
1307     }
1308     return -1;
1309 }
1310
1311 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1312 {
1313     int ret = tcc_add_library(s, libname);
1314     if (ret < 0)
1315         tcc_error_noabort("cannot find library 'lib%s'", libname);
1316     return ret;
1317 }
1318
1319 /* habdle #pragma comment(lib,) */
1320 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1321 {
1322     int i;
1323     for (i = 0; i < s1->nb_pragma_libs; i++)
1324         tcc_add_library_err(s1, s1->pragma_libs[i]);
1325 }
1326
1327 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1328 {
1329 #ifdef TCC_TARGET_PE
1330     /* On x86_64 'val' might not be reachable with a 32bit offset.
1331        So it is handled here as if it were in a DLL. */
1332     pe_putimport(s, 0, name, (uintptr_t)val);
1333 #else
1334     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1335         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1336         SHN_ABS, name);
1337 #endif
1338     return 0;
1339 }
1340
1341 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1342 {
1343     s->output_type = output_type;
1344
1345     if (!s->nostdinc) {
1346         /* default include paths */
1347         /* -isystem paths have already been handled */
1348         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1349     }
1350
1351     /* if bound checking, then add corresponding sections */
1352 #ifdef CONFIG_TCC_BCHECK
1353     if (s->do_bounds_check) {
1354         /* define symbol */
1355         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1356         /* create bounds sections */
1357         bounds_section = new_section(s, ".bounds",
1358                                      SHT_PROGBITS, SHF_ALLOC);
1359         lbounds_section = new_section(s, ".lbounds",
1360                                       SHT_PROGBITS, SHF_ALLOC);
1361     }
1362 #endif
1363
1364     if (s->char_is_unsigned) {
1365         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1366     }
1367
1368     /* add debug sections */
1369     if (s->do_debug) {
1370         /* stab symbols */
1371         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1372         stab_section->sh_entsize = sizeof(Stab_Sym);
1373         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1374         put_elf_str(stabstr_section, "");
1375         stab_section->link = stabstr_section;
1376         /* put first entry */
1377         put_stabs("", 0, 0, 0, 0);
1378     }
1379
1380     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1381 #ifdef TCC_TARGET_PE
1382 # ifdef _WIN32
1383     tcc_add_systemdir(s);
1384 # endif
1385 #else
1386     /* add libc crt1/crti objects */
1387     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1388         !s->nostdlib) {
1389         if (output_type != TCC_OUTPUT_DLL)
1390             tcc_add_crt(s, "crt1.o");
1391         tcc_add_crt(s, "crti.o");
1392     }
1393 #endif
1394
1395 #ifdef CONFIG_TCC_BCHECK
1396     if (s->do_bounds_check && (output_type == TCC_OUTPUT_EXE))
1397     {
1398         /* force a bcheck.o linking */
1399         addr_t func = TOK___bound_init;
1400         Sym *sym = external_global_sym(func, &func_old_type, 0);
1401         if (!sym->c)
1402             put_extern_sym(sym, NULL, 0, 0);
1403     }
1404 #endif
1405     return 0;
1406 }
1407
1408 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1409 {
1410     tcc_free(s->tcc_lib_path);
1411     s->tcc_lib_path = tcc_strdup(path);
1412 }
1413
1414 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1415 #define FD_INVERT 0x0002 /* invert value before storing */
1416
1417 typedef struct FlagDef {
1418     uint16_t offset;
1419     uint16_t flags;
1420     const char *name;
1421 } FlagDef;
1422
1423 static const FlagDef warning_defs[] = {
1424     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1425     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1426     { offsetof(TCCState, warn_error), 0, "error" },
1427     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1428       "implicit-function-declaration" },
1429 };
1430
1431 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1432                     const char *name, int value)
1433 {
1434     int i;
1435     const FlagDef *p;
1436     const char *r;
1437
1438     r = name;
1439     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1440         r += 3;
1441         value = !value;
1442     }
1443     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1444         if (!strcmp(r, p->name))
1445             goto found;
1446     }
1447     return -1;
1448  found:
1449     if (p->flags & FD_INVERT)
1450         value = !value;
1451     *(int *)((uint8_t *)s + p->offset) = value;
1452     return 0;
1453 }
1454
1455 /* set/reset a warning */
1456 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1457 {
1458     int i;
1459     const FlagDef *p;
1460
1461     if (!strcmp(warning_name, "all")) {
1462         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1463             if (p->flags & WD_ALL)
1464                 *(int *)((uint8_t *)s + p->offset) = 1;
1465         }
1466         return 0;
1467     } else {
1468         return set_flag(s, warning_defs, countof(warning_defs),
1469                         warning_name, value);
1470     }
1471 }
1472
1473 static const FlagDef flag_defs[] = {
1474     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1475     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1476     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1477     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1478     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1479     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1480     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1481 };
1482
1483 /* set/reset a flag */
1484 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1485 {
1486     return set_flag(s, flag_defs, countof(flag_defs),
1487                     flag_name, value);
1488 }
1489
1490
1491 static int strstart(const char *val, const char **str)
1492 {
1493     const char *p, *q;
1494     p = *str;
1495     q = val;
1496     while (*q) {
1497         if (*p != *q)
1498             return 0;
1499         p++;
1500         q++;
1501     }
1502     *str = p;
1503     return 1;
1504 }
1505
1506 /* Like strstart, but automatically takes into account that ld options can
1507  *
1508  * - start with double or single dash (e.g. '--soname' or '-soname')
1509  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1510  *   or '-Wl,-soname=x.so')
1511  *
1512  * you provide `val` always in 'option[=]' form (no leading -)
1513  */
1514 static int link_option(const char *str, const char *val, const char **ptr)
1515 {
1516     const char *p, *q;
1517
1518     /* there should be 1 or 2 dashes */
1519     if (*str++ != '-')
1520         return 0;
1521     if (*str == '-')
1522         str++;
1523
1524     /* then str & val should match (potentialy up to '=') */
1525     p = str;
1526     q = val;
1527
1528     while (*q != '\0' && *q != '=') {
1529         if (*p != *q)
1530             return 0;
1531         p++;
1532         q++;
1533     }
1534
1535     /* '=' near eos means ',' or '=' is ok */
1536     if (*q == '=') {
1537         if (*p != ',' && *p != '=')
1538             return 0;
1539         p++;
1540         q++;
1541     }
1542
1543     if (ptr)
1544         *ptr = p;
1545     return 1;
1546 }
1547
1548 static const char *skip_linker_arg(const char **str)
1549 {
1550     const char *s1 = *str;
1551     const char *s2 = strchr(s1, ',');
1552     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1553     return s2;
1554 }
1555
1556 static char *copy_linker_arg(const char *p)
1557 {
1558     const char *q = p;
1559     skip_linker_arg(&q);
1560     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1561 }
1562
1563 /* set linker options */
1564 static int tcc_set_linker(TCCState *s, const char *option)
1565 {
1566     while (option && *option) {
1567
1568         const char *p = option;
1569         char *end = NULL;
1570         int ignoring = 0;
1571
1572         if (link_option(option, "Bsymbolic", &p)) {
1573             s->symbolic = 1;
1574         } else if (link_option(option, "nostdlib", &p)) {
1575             s->nostdlib = 1;
1576         } else if (link_option(option, "fini=", &p)) {
1577             s->fini_symbol = copy_linker_arg(p);
1578             ignoring = 1;
1579         } else if (link_option(option, "image-base=", &p)
1580                 || link_option(option, "Ttext=", &p)) {
1581             s->text_addr = strtoull(p, &end, 16);
1582             s->has_text_addr = 1;
1583         } else if (link_option(option, "init=", &p)) {
1584             s->init_symbol = copy_linker_arg(p);
1585             ignoring = 1;
1586         } else if (link_option(option, "oformat=", &p)) {
1587 #if defined(TCC_TARGET_PE)
1588             if (strstart("pe-", &p)) {
1589 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1590             if (strstart("elf64-", &p)) {
1591 #else
1592             if (strstart("elf32-", &p)) {
1593 #endif
1594                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1595             } else if (!strcmp(p, "binary")) {
1596                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1597 #ifdef TCC_TARGET_COFF
1598             } else if (!strcmp(p, "coff")) {
1599                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1600 #endif
1601             } else
1602                 goto err;
1603
1604         } else if (link_option(option, "as-needed", &p)) {
1605             ignoring = 1;
1606         } else if (link_option(option, "O", &p)) {
1607             ignoring = 1;
1608         } else if (link_option(option, "rpath=", &p)) {
1609             s->rpath = copy_linker_arg(p);
1610         } else if (link_option(option, "section-alignment=", &p)) {
1611             s->section_align = strtoul(p, &end, 16);
1612         } else if (link_option(option, "soname=", &p)) {
1613             s->soname = copy_linker_arg(p);
1614 #ifdef TCC_TARGET_PE
1615         } else if (link_option(option, "file-alignment=", &p)) {
1616             s->pe_file_align = strtoul(p, &end, 16);
1617         } else if (link_option(option, "stack=", &p)) {
1618             s->pe_stack_size = strtoul(p, &end, 10);
1619         } else if (link_option(option, "subsystem=", &p)) {
1620 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1621             if (!strcmp(p, "native")) {
1622                 s->pe_subsystem = 1;
1623             } else if (!strcmp(p, "console")) {
1624                 s->pe_subsystem = 3;
1625             } else if (!strcmp(p, "gui")) {
1626                 s->pe_subsystem = 2;
1627             } else if (!strcmp(p, "posix")) {
1628                 s->pe_subsystem = 7;
1629             } else if (!strcmp(p, "efiapp")) {
1630                 s->pe_subsystem = 10;
1631             } else if (!strcmp(p, "efiboot")) {
1632                 s->pe_subsystem = 11;
1633             } else if (!strcmp(p, "efiruntime")) {
1634                 s->pe_subsystem = 12;
1635             } else if (!strcmp(p, "efirom")) {
1636                 s->pe_subsystem = 13;
1637 #elif defined(TCC_TARGET_ARM)
1638             if (!strcmp(p, "wince")) {
1639                 s->pe_subsystem = 9;
1640 #endif
1641             } else
1642                 goto err;
1643 #endif
1644         } else
1645             goto err;
1646
1647         if (ignoring && s->warn_unsupported) err: {
1648             char buf[100], *e;
1649             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1650             if (ignoring)
1651                 tcc_warning("unsupported linker option '%s'", buf);
1652             else
1653                 tcc_error("unsupported linker option '%s'", buf);
1654         }
1655         option = skip_linker_arg(&p);
1656     }
1657     return 0;
1658 }
1659
1660 typedef struct TCCOption {
1661     const char *name;
1662     uint16_t index;
1663     uint16_t flags;
1664 } TCCOption;
1665
1666 enum {
1667     TCC_OPTION_HELP,
1668     TCC_OPTION_I,
1669     TCC_OPTION_D,
1670     TCC_OPTION_U,
1671     TCC_OPTION_P,
1672     TCC_OPTION_L,
1673     TCC_OPTION_B,
1674     TCC_OPTION_l,
1675     TCC_OPTION_bench,
1676     TCC_OPTION_bt,
1677     TCC_OPTION_b,
1678     TCC_OPTION_g,
1679     TCC_OPTION_c,
1680     TCC_OPTION_dumpversion,
1681     TCC_OPTION_float_abi,
1682     TCC_OPTION_static,
1683     TCC_OPTION_std,
1684     TCC_OPTION_shared,
1685     TCC_OPTION_soname,
1686     TCC_OPTION_o,
1687     TCC_OPTION_r,
1688     TCC_OPTION_s,
1689     TCC_OPTION_traditional,
1690     TCC_OPTION_Wl,
1691     TCC_OPTION_W,
1692     TCC_OPTION_O,
1693     TCC_OPTION_m,
1694     TCC_OPTION_f,
1695     TCC_OPTION_isystem,
1696     TCC_OPTION_iwithprefix,
1697     TCC_OPTION_nostdinc,
1698     TCC_OPTION_nostdlib,
1699     TCC_OPTION_print_search_dirs,
1700     TCC_OPTION_rdynamic,
1701     TCC_OPTION_pedantic,
1702     TCC_OPTION_pthread,
1703     TCC_OPTION_run,
1704     TCC_OPTION_v,
1705     TCC_OPTION_w,
1706     TCC_OPTION_pipe,
1707     TCC_OPTION_E,
1708     TCC_OPTION_MD,
1709     TCC_OPTION_MF,
1710     TCC_OPTION_x,
1711 };
1712
1713 #define TCC_OPTION_HAS_ARG 0x0001
1714 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1715
1716 static const TCCOption tcc_options[] = {
1717     { "h", TCC_OPTION_HELP, 0 },
1718     { "-help", TCC_OPTION_HELP, 0 },
1719     { "?", TCC_OPTION_HELP, 0 },
1720     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1721     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1722     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1723     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1724     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1725     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1726     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1727     { "bench", TCC_OPTION_bench, 0 },
1728 #ifdef CONFIG_TCC_BACKTRACE
1729     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1730 #endif
1731 #ifdef CONFIG_TCC_BCHECK
1732     { "b", TCC_OPTION_b, 0 },
1733 #endif
1734     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1735     { "c", TCC_OPTION_c, 0 },
1736     { "dumpversion", TCC_OPTION_dumpversion, 0},
1737 #ifdef TCC_TARGET_ARM
1738     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1739 #endif
1740     { "static", TCC_OPTION_static, 0 },
1741     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1742     { "shared", TCC_OPTION_shared, 0 },
1743     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1744     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1745     { "pedantic", TCC_OPTION_pedantic, 0},
1746     { "pthread", TCC_OPTION_pthread, 0},
1747     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1748     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1749     { "r", TCC_OPTION_r, 0 },
1750     { "s", TCC_OPTION_s, 0 },
1751     { "traditional", TCC_OPTION_traditional, 0 },
1752     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1753     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1754     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1755     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1756     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1757     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1758     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
1759     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1760     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1761     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1762     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1763     { "w", TCC_OPTION_w, 0 },
1764     { "pipe", TCC_OPTION_pipe, 0},
1765     { "E", TCC_OPTION_E, 0},
1766     { "MD", TCC_OPTION_MD, 0},
1767     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1768     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1769     { NULL, 0, 0 },
1770 };
1771
1772 static void parse_option_D(TCCState *s1, const char *optarg)
1773 {
1774     char *sym = tcc_strdup(optarg);
1775     char *value = strchr(sym, '=');
1776     if (value)
1777         *value++ = '\0';
1778     tcc_define_symbol(s1, sym, value);
1779     tcc_free(sym);
1780 }
1781
1782 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1783 {
1784     int len = strlen(filename);
1785     char *p = tcc_malloc(len + 2);
1786     if (filetype) {
1787         *p = filetype;
1788     }
1789     else {
1790         /* use a file extension to detect a filetype */
1791         const char *ext = tcc_fileextension(filename);
1792         if (ext[0]) {
1793             ext++;
1794             if (!strcmp(ext, "S"))
1795                 *p = TCC_FILETYPE_ASM_PP;
1796             else
1797             if (!strcmp(ext, "s"))
1798                 *p = TCC_FILETYPE_ASM;
1799             else
1800             if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1801                 *p = TCC_FILETYPE_C;
1802             else
1803                 *p = TCC_FILETYPE_BINARY;
1804         }
1805         else {
1806             *p = TCC_FILETYPE_C;
1807         }
1808     }
1809     strcpy(p+1, filename);
1810     dynarray_add((void ***)&s->files, &s->nb_files, p);
1811 }
1812
1813 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1814 {
1815     const TCCOption *popt;
1816     const char *optarg, *r;
1817     int run = 0;
1818     int pthread = 0;
1819     int optind = 0;
1820     int filetype = 0;
1821
1822     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1823     CString linker_arg;
1824     cstr_new(&linker_arg);
1825
1826     while (optind < argc) {
1827
1828         r = argv[optind++];
1829         if (r[0] != '-' || r[1] == '\0') {
1830             args_parser_add_file(s, r, filetype);
1831             if (run) {
1832                 optind--;
1833                 /* argv[0] will be this file */
1834                 break;
1835             }
1836             continue;
1837         }
1838
1839         /* find option in table */
1840         for(popt = tcc_options; ; ++popt) {
1841             const char *p1 = popt->name;
1842             const char *r1 = r + 1;
1843             if (p1 == NULL)
1844                 tcc_error("invalid option -- '%s'", r);
1845             if (!strstart(p1, &r1))
1846                 continue;
1847             optarg = r1;
1848             if (popt->flags & TCC_OPTION_HAS_ARG) {
1849                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1850                     if (optind >= argc)
1851                         tcc_error("argument to '%s' is missing", r);
1852                     optarg = argv[optind++];
1853                 }
1854             } else if (*r1 != '\0')
1855                 continue;
1856             break;
1857         }
1858
1859         switch(popt->index) {
1860         case TCC_OPTION_HELP:
1861             return 0;
1862         case TCC_OPTION_I:
1863             tcc_add_include_path(s, optarg);
1864             break;
1865         case TCC_OPTION_D:
1866             parse_option_D(s, optarg);
1867             break;
1868         case TCC_OPTION_U:
1869             tcc_undefine_symbol(s, optarg);
1870             break;
1871         case TCC_OPTION_L:
1872             tcc_add_library_path(s, optarg);
1873             break;
1874         case TCC_OPTION_B:
1875             /* set tcc utilities path (mainly for tcc development) */
1876             tcc_set_lib_path(s, optarg);
1877             break;
1878         case TCC_OPTION_l:
1879             args_parser_add_file(s, r, TCC_FILETYPE_BINARY);
1880             s->nb_libraries++;
1881             break;
1882         case TCC_OPTION_pthread:
1883             parse_option_D(s, "_REENTRANT");
1884             pthread = 1;
1885             break;
1886         case TCC_OPTION_bench:
1887             s->do_bench = 1;
1888             break;
1889 #ifdef CONFIG_TCC_BACKTRACE
1890         case TCC_OPTION_bt:
1891             tcc_set_num_callers(atoi(optarg));
1892             break;
1893 #endif
1894 #ifdef CONFIG_TCC_BCHECK
1895         case TCC_OPTION_b:
1896             s->do_bounds_check = 1;
1897             s->do_debug = 1;
1898             break;
1899 #endif
1900         case TCC_OPTION_g:
1901             s->do_debug = 1;
1902             break;
1903         case TCC_OPTION_c:
1904             if (s->output_type)
1905                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
1906             s->output_type = TCC_OUTPUT_OBJ;
1907             break;
1908 #ifdef TCC_TARGET_ARM
1909         case TCC_OPTION_float_abi:
1910             /* tcc doesn't support soft float yet */
1911             if (!strcmp(optarg, "softfp")) {
1912                 s->float_abi = ARM_SOFTFP_FLOAT;
1913                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1914             } else if (!strcmp(optarg, "hard"))
1915                 s->float_abi = ARM_HARD_FLOAT;
1916             else
1917                 tcc_error("unsupported float abi '%s'", optarg);
1918             break;
1919 #endif
1920         case TCC_OPTION_static:
1921             s->static_link = 1;
1922             break;
1923         case TCC_OPTION_std:
1924             /* silently ignore, a current purpose:
1925                allow to use a tcc as a reference compiler for "make test" */
1926             break;
1927         case TCC_OPTION_shared:
1928             if (s->output_type)
1929                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
1930             s->output_type = TCC_OUTPUT_DLL;
1931             break;
1932         case TCC_OPTION_soname:
1933             s->soname = tcc_strdup(optarg);
1934             break;
1935         case TCC_OPTION_m:
1936             s->option_m = tcc_strdup(optarg);
1937             break;
1938         case TCC_OPTION_o:
1939             if (s->outfile) {
1940                 tcc_warning("multiple -o option");
1941                 tcc_free(s->outfile);
1942             }
1943             s->outfile = tcc_strdup(optarg);
1944             break;
1945         case TCC_OPTION_r:
1946             /* generate a .o merging several output files */
1947             if (s->output_type)
1948                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
1949             s->option_r = 1;
1950             s->output_type = TCC_OUTPUT_OBJ;
1951             break;
1952         case TCC_OPTION_isystem:
1953             tcc_add_sysinclude_path(s, optarg);
1954             break;
1955         case TCC_OPTION_iwithprefix:
1956             if (1) {
1957                 char buf[1024];
1958                 int buf_size = sizeof(buf)-1;
1959                 char *p = &buf[0];
1960
1961                 char *sysroot = "{B}/";
1962                 int len = strlen(sysroot);
1963                 if (len > buf_size)
1964                     len = buf_size;
1965                 strncpy(p, sysroot, len);
1966                 p += len;
1967                 buf_size -= len;
1968
1969                 len = strlen(optarg);
1970                 if (len > buf_size)
1971                     len = buf_size;
1972                 strncpy(p, optarg, len+1);
1973                 tcc_add_sysinclude_path(s, buf);
1974             }
1975             break;
1976         case TCC_OPTION_nostdinc:
1977             s->nostdinc = 1;
1978             break;
1979         case TCC_OPTION_nostdlib:
1980             s->nostdlib = 1;
1981             break;
1982         case TCC_OPTION_print_search_dirs:
1983             s->print_search_dirs = 1;
1984             break;
1985         case TCC_OPTION_run:
1986             if (s->output_type)
1987                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
1988             s->output_type = TCC_OUTPUT_MEMORY;
1989             tcc_set_options(s, optarg);
1990             run = 1;
1991             break;
1992         case TCC_OPTION_v:
1993             do ++s->verbose; while (*optarg++ == 'v');
1994             break;
1995         case TCC_OPTION_f:
1996             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1997                 goto unsupported_option;
1998             break;
1999         case TCC_OPTION_W:
2000             if (tcc_set_warning(s, optarg, 1) < 0 &&
2001                 s->warn_unsupported)
2002                 goto unsupported_option;
2003             break;
2004         case TCC_OPTION_w:
2005             s->warn_none = 1;
2006             break;
2007         case TCC_OPTION_rdynamic:
2008             s->rdynamic = 1;
2009             break;
2010         case TCC_OPTION_Wl:
2011             if (linker_arg.size)
2012                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
2013             cstr_cat(&linker_arg, optarg);
2014             cstr_ccat(&linker_arg, '\0');
2015             break;
2016         case TCC_OPTION_E:
2017             if (s->output_type)
2018                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
2019             s->output_type = TCC_OUTPUT_PREPROCESS;
2020             break;
2021         case TCC_OPTION_P:
2022             s->Pflag = atoi(optarg) + 1;
2023             break;
2024         case TCC_OPTION_MD:
2025             s->gen_deps = 1;
2026             break;
2027         case TCC_OPTION_MF:
2028             s->deps_outfile = tcc_strdup(optarg);
2029             break;
2030         case TCC_OPTION_dumpversion:
2031             printf ("%s\n", TCC_VERSION);
2032             exit(0);
2033         case TCC_OPTION_s:
2034             s->do_strip = 1;
2035             break;
2036         case TCC_OPTION_traditional:
2037             break;
2038         case TCC_OPTION_x:
2039             if (*optarg == 'c')
2040                 filetype = TCC_FILETYPE_C;
2041             else
2042             if (*optarg == 'a')
2043                 filetype = TCC_FILETYPE_ASM_PP;
2044             else
2045             if (*optarg == 'n')
2046                 filetype = 0;
2047             else
2048                 tcc_warning("unsupported language '%s'", optarg);
2049             break;
2050         case TCC_OPTION_O:
2051         case TCC_OPTION_pedantic:
2052         case TCC_OPTION_pipe:
2053             /* ignored */
2054             break;
2055         default:
2056             if (s->warn_unsupported) {
2057             unsupported_option:
2058                 tcc_warning("unsupported option '%s'", r);
2059             }
2060             break;
2061         }
2062     }
2063
2064     if (s->output_type == 0)
2065         s->output_type = TCC_OUTPUT_EXE;
2066
2067     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
2068         tcc_set_options(s, "-lpthread");
2069
2070     if (s->output_type == TCC_OUTPUT_EXE)
2071         tcc_set_linker(s, (const char *)linker_arg.data);
2072     cstr_free(&linker_arg);
2073
2074     return optind;
2075 }
2076
2077 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
2078 {
2079     const char *s1;
2080     char **argv, *arg;
2081     int argc, len;
2082     int ret;
2083
2084     argc = 0, argv = NULL;
2085     for(;;) {
2086         while (is_space(*str))
2087             str++;
2088         if (*str == '\0')
2089             break;
2090         s1 = str;
2091         while (*str != '\0' && !is_space(*str))
2092             str++;
2093         len = str - s1;
2094         arg = tcc_malloc(len + 1);
2095         pstrncpy(arg, s1, len);
2096         dynarray_add((void ***)&argv, &argc, arg);
2097     }
2098     ret = tcc_parse_args(s, argc, argv);
2099     dynarray_reset(&argv, &argc);
2100     return ret;
2101 }
2102
2103 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2104 {
2105     double tt;
2106     tt = (double)total_time / 1000000.0;
2107     if (tt < 0.001)
2108         tt = 0.001;
2109     if (total_bytes < 1)
2110         total_bytes = 1;
2111     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2112            tok_ident - TOK_IDENT, total_lines, total_bytes,
2113            tt, (int)(total_lines / tt),
2114            total_bytes / tt / 1000000.0);
2115 }
2116
2117 PUB_FUNC void tcc_set_environment(TCCState *s)
2118 {
2119     char * path;
2120
2121     path = getenv("C_INCLUDE_PATH");
2122     if(path != NULL) {
2123         tcc_add_include_path(s, path);
2124     }
2125     path = getenv("CPATH");
2126     if(path != NULL) {
2127         tcc_add_include_path(s, path);
2128     }
2129     path = getenv("LIBRARY_PATH");
2130     if(path != NULL) {
2131         tcc_add_library_path(s, path);
2132     }
2133 }