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         fprintf(stderr, "%s\n", buf);
 612     } else {
 613         s1->error_func(s1->error_opaque, buf);
 614     }
 615     if (!is_warning || s1->warn_error)
 616         s1->nb_errors++;
 617 }
 618
 619 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 620                         void (*error_func)(void *opaque, const char *msg))
 621 {
 622     s->error_opaque = error_opaque;
 623     s->error_func = error_func;
 624 }
 625
 626 /* error without aborting current compilation */
 627 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 628 {
 629     TCCState *s1 = tcc_state;
 630     va_list ap;
 631
 632     va_start(ap, fmt);
 633     error1(s1, 0, fmt, ap);
 634     va_end(ap);
 635 }
 636
 637 PUB_FUNC void tcc_error(const char *fmt, ...)
 638 {
 639     TCCState *s1 = tcc_state;
 640     va_list ap;
 641
 642     va_start(ap, fmt);
 643     error1(s1, 0, fmt, ap);
 644     va_end(ap);
 645     /* better than nothing: in some cases, we accept to handle errors */
 646     if (s1->error_set_jmp_enabled) {
 647         longjmp(s1->error_jmp_buf, 1);
 648     } else {
 649         /* XXX: eliminate this someday */
 650         exit(1);
 651     }
 652 }
 653
 654 PUB_FUNC void tcc_warning(const char *fmt, ...)
 655 {
 656     TCCState *s1 = tcc_state;
 657     va_list ap;
 658
 659     if (s1->warn_none)
 660         return;
 661
 662     va_start(ap, fmt);
 663     error1(s1, 1, fmt, ap);
 664     va_end(ap);
 665 }
 666
 667 /********************************************************/
 668 /* I/O layer */
 669
 670 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 671 {
 672     BufferedFile *bf;
 673     int buflen = initlen ? initlen : IO_BUF_SIZE;
 674
 675     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 676     bf->buf_ptr = bf->buffer;
 677     bf->buf_end = bf->buffer + initlen;
 678     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 679     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 680 #ifdef _WIN32
 681     normalize_slashes(bf->filename);
 682 #endif
 683     bf->line_num = 1;
 684     bf->ifndef_macro = 0;
 685     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 686     bf->fd = -1;
 687     bf->prev = file;
 688     file = bf;
 689 }
 690
 691 ST_FUNC void tcc_close(void)
 692 {
 693     BufferedFile *bf = file;
 694     if (bf->fd > 0) {
 695         close(bf->fd);
 696         total_lines += bf->line_num;
 697     }
 698     file = bf->prev;
 699     tcc_free(bf);
 700 }
 701
 702 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 703 {
 704     int fd;
 705     if (strcmp(filename, "-") == 0)
 706         fd = 0, filename = "stdin";
 707     else
 708         fd = open(filename, O_RDONLY | O_BINARY);
 709     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 710         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 711                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 712     if (fd < 0)
 713         return -1;
 714
 715     tcc_open_bf(s1, filename, 0);
 716     file->fd = fd;
 717     return fd;
 718 }
 719
 720 /* compile the C file opened in 'file'. Return non zero if errors. */
 721 static int tcc_compile(TCCState *s1)
 722 {
 723     Sym *define_start;
 724     SValue *pvtop;
 725     char buf[512];
 726     volatile int section_sym;
 727
 728 #ifdef INC_DEBUG
 729     printf("%s: **** new file\n", file->filename);
 730 #endif
 731     preprocess_init(s1);
 732
 733     cur_text_section = NULL;
 734     funcname = "";
 735     anon_sym = SYM_FIRST_ANOM;
 736
 737     /* file info: full path + filename */
 738     section_sym = 0; /* avoid warning */
 739     if (s1->do_debug) {
 740         section_sym = put_elf_sym(symtab_section, 0, 0,
 741                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 742                                   text_section->sh_num, NULL);
 743         getcwd(buf, sizeof(buf));
 744 #ifdef _WIN32
 745         normalize_slashes(buf);
 746 #endif
 747         pstrcat(buf, sizeof(buf), "/");
 748         put_stabs_r(buf, N_SO, 0, 0,
 749                     text_section->data_offset, text_section, section_sym);
 750         put_stabs_r(file->filename, N_SO, 0, 0,
 751                     text_section->data_offset, text_section, section_sym);
 752     }
 753     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 754        symbols can be safely used */
 755     put_elf_sym(symtab_section, 0, 0,
 756                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 757                 SHN_ABS, file->filename);
 758
 759     /* define some often used types */
 760     int_type.t = VT_INT;
 761
 762     char_pointer_type.t = VT_BYTE;
 763     mk_pointer(&char_pointer_type);
 764
 765 #if PTR_SIZE == 4
 766     size_type.t = VT_INT;
 767 #else
 768     size_type.t = VT_LLONG;
 769 #endif
 770
 771     func_old_type.t = VT_FUNC;
 772     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 773 #ifdef TCC_TARGET_ARM
 774     arm_init(s1);
 775 #endif
 776
 777 #if 0
 778     /* define 'void *alloca(unsigned int)' builtin function */
 779     {
 780         Sym *s1;
 781
 782         p = anon_sym++;
 783         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 784         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 785         s1->next = NULL;
 786         sym->next = s1;
 787         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 788     }
 789 #endif
 790
 791     define_start = define_stack;
 792     nocode_wanted = 1;
 793
 794     if (setjmp(s1->error_jmp_buf) == 0) {
 795         s1->nb_errors = 0;
 796         s1->error_set_jmp_enabled = 1;
 797
 798         ch = file->buf_ptr[0];
 799         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 800         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 801         pvtop = vtop;
 802         next();
 803         decl(VT_CONST);
 804         if (tok != TOK_EOF)
 805             expect("declaration");
 806         if (pvtop != vtop)
 807             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 808
 809         /* end of translation unit info */
 810         if (s1->do_debug) {
 811             put_stabs_r(NULL, N_SO, 0, 0,
 812                         text_section->data_offset, text_section, section_sym);
 813         }
 814     }
 815
 816     s1->error_set_jmp_enabled = 0;
 817
 818     /* reset define stack, but leave -Dsymbols (may be incorrect if
 819        they are undefined) */
 820     free_defines(define_start);
 821
 822     gen_inline_functions();
 823
 824     sym_pop(&global_stack, NULL);
 825     sym_pop(&local_stack, NULL);
 826
 827     return s1->nb_errors != 0 ? -1 : 0;
 828 }
 829
 830 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 831 {
 832     int len, ret;
 833     len = strlen(str);
 834
 835     tcc_open_bf(s, "<string>", len);
 836     memcpy(file->buffer, str, len);
 837     ret = tcc_compile(s);
 838     tcc_close();
 839     return ret;
 840 }
 841
 842 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 843 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 844 {
 845     int len1, len2;
 846     /* default value */
 847     if (!value)
 848         value = "1";
 849     len1 = strlen(sym);
 850     len2 = strlen(value);
 851
 852     /* init file structure */
 853     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 854     memcpy(file->buffer, sym, len1);
 855     file->buffer[len1] = ' ';
 856     memcpy(file->buffer + len1 + 1, value, len2);
 857
 858     /* parse with define parser */
 859     ch = file->buf_ptr[0];
 860     next_nomacro();
 861     parse_define();
 862
 863     tcc_close();
 864 }
 865
 866 /* undefine a preprocessor symbol */
 867 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 868 {
 869     TokenSym *ts;
 870     Sym *s;
 871     ts = tok_alloc(sym, strlen(sym));
 872     s = define_find(ts->tok);
 873     /* undefine symbol by putting an invalid name */
 874     if (s)
 875         define_undef(s);
 876     tcc_free(ts);
 877 }
 878
 879 /* cleanup all static data used during compilation */
 880 static void tcc_cleanup(void)
 881 {
 882     int i, n;
 883     if (NULL == tcc_state)
 884         return;
 885     tcc_state = NULL;
 886
 887     /* free -D defines */
 888     free_defines(NULL);
 889
 890     /* free tokens */
 891     n = tok_ident - TOK_IDENT;
 892     for(i = 0; i < n; i++)
 893         tcc_free(table_ident[i]);
 894     tcc_free(table_ident);
 895     table_ident = NULL;
 896
 897     /* free sym_pools */
 898     dynarray_reset(&sym_pools, &nb_sym_pools);
 899     /* string buffer */
 900     cstr_free(&tokcstr);
 901     /* reset symbol stack */
 902     sym_free_first = NULL;
 903     /* cleanup from error/setjmp */
 904     macro_ptr = NULL;
 905 }
 906
 907 LIBTCCAPI TCCState *tcc_new(void)
 908 {
 909     TCCState *s;
 910     char buffer[100];
 911     int a,b,c;
 912
 913     tcc_cleanup();
 914
 915     s = tcc_mallocz(sizeof(TCCState));
 916     if (!s)
 917         return NULL;
 918     tcc_state = s;
 919 #ifdef _WIN32
 920     tcc_set_lib_path_w32(s);
 921 #else
 922     tcc_set_lib_path(s, CONFIG_TCCDIR);
 923 #endif
 924     s->output_type = 0;
 925     preprocess_new();
 926     s->include_stack_ptr = s->include_stack;
 927
 928     /* we add dummy defines for some special macros to speed up tests
 929        and to have working defined() */
 930     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 931     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 932     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 933     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 934
 935     /* define __TINYC__ 92X  */
 936     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 937     sprintf(buffer, "%d", a*10000 + b*100 + c);
 938     tcc_define_symbol(s, "__TINYC__", buffer);
 939
 940     /* standard defines */
 941     tcc_define_symbol(s, "__STDC__", NULL);
 942     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 943     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 944
 945     /* target defines */
 946 #if defined(TCC_TARGET_I386)
 947     tcc_define_symbol(s, "__i386__", NULL);
 948     tcc_define_symbol(s, "__i386", NULL);
 949     tcc_define_symbol(s, "i386", NULL);
 950 #elif defined(TCC_TARGET_X86_64)
 951     tcc_define_symbol(s, "__x86_64__", NULL);
 952 #elif defined(TCC_TARGET_ARM)
 953     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 954     tcc_define_symbol(s, "__arm_elf__", NULL);
 955     tcc_define_symbol(s, "__arm_elf", NULL);
 956     tcc_define_symbol(s, "arm_elf", NULL);
 957     tcc_define_symbol(s, "__arm__", NULL);
 958     tcc_define_symbol(s, "__arm", NULL);
 959     tcc_define_symbol(s, "arm", NULL);
 960     tcc_define_symbol(s, "__APCS_32__", NULL);
 961     tcc_define_symbol(s, "__ARMEL__", NULL);
 962 #if defined(TCC_ARM_EABI)
 963     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 964 #endif
 965 #if defined(TCC_ARM_HARDFLOAT)
 966     s->float_abi = ARM_HARD_FLOAT;
 967     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 968 #else
 969     s->float_abi = ARM_SOFTFP_FLOAT;
 970 #endif
 971 #elif defined(TCC_TARGET_ARM64)
 972     tcc_define_symbol(s, "__aarch64__", NULL);
 973 #endif
 974
 975 #ifdef TCC_TARGET_PE
 976     tcc_define_symbol(s, "_WIN32", NULL);
 977 # ifdef TCC_TARGET_X86_64
 978     tcc_define_symbol(s, "_WIN64", NULL);
 979 # endif
 980 #else
 981     tcc_define_symbol(s, "__unix__", NULL);
 982     tcc_define_symbol(s, "__unix", NULL);
 983     tcc_define_symbol(s, "unix", NULL);
 984 # if defined(__linux)
 985     tcc_define_symbol(s, "__linux__", NULL);
 986     tcc_define_symbol(s, "__linux", NULL);
 987 # endif
 988 # if defined(__FreeBSD__)
 989 #  define str(s) #s
 990     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 991 #  undef str
 992 # endif
 993 # if defined(__FreeBSD_kernel__)
 994     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 995 # endif
 996 #endif
 997
 998     /* TinyCC & gcc defines */
 999 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
1000     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1001     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1002 #else
1003     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1004     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1005 #endif
1006
1007 #ifdef TCC_TARGET_PE
1008     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1009     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1010 #else
1011     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1012     /* wint_t is unsigned int by default, but (signed) int on BSDs
1013        and unsigned short on windows.  Other OSes might have still
1014        other conventions, sigh.  */
1015 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
1016     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1017 #else
1018     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1019 #endif
1020 #endif
1021
1022 #ifndef TCC_TARGET_PE
1023     /* glibc defines */
1024     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1025     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1026     /* paths for crt objects */
1027     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1028 #endif
1029
1030     /* no section zero */
1031     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1032
1033     /* create standard sections */
1034     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1035     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1036     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1037
1038     /* symbols are always generated for linking stage */
1039     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1040                                 ".strtab",
1041                                 ".hashtab", SHF_PRIVATE);
1042     strtab_section = symtab_section->link;
1043     s->symtab = symtab_section;
1044
1045     /* private symbol table for dynamic symbols */
1046     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1047                                       ".dynstrtab",
1048                                       ".dynhashtab", SHF_PRIVATE);
1049     s->alacarte_link = 1;
1050     s->nocommon = 1;
1051     s->warn_implicit_function_declaration = 1;
1052
1053 #ifdef CHAR_IS_UNSIGNED
1054     s->char_is_unsigned = 1;
1055 #endif
1056     /* enable this if you want symbols with leading underscore on windows: */
1057 #if 0 /* def TCC_TARGET_PE */
1058     s->leading_underscore = 1;
1059 #endif
1060 #ifdef TCC_TARGET_I386
1061     s->seg_size = 32;
1062 #endif
1063 #ifdef TCC_IS_NATIVE
1064     s->runtime_main = "main";
1065 #endif
1066     return s;
1067 }
1068
1069 LIBTCCAPI void tcc_delete(TCCState *s1)
1070 {
1071     int i;
1072
1073     tcc_cleanup();
1074
1075     /* free all sections */
1076     for(i = 1; i < s1->nb_sections; i++)
1077         free_section(s1->sections[i]);
1078     dynarray_reset(&s1->sections, &s1->nb_sections);
1079
1080     for(i = 0; i < s1->nb_priv_sections; i++)
1081         free_section(s1->priv_sections[i]);
1082     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1083
1084     /* free any loaded DLLs */
1085 #ifdef TCC_IS_NATIVE
1086     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1087         DLLReference *ref = s1->loaded_dlls[i];
1088         if ( ref->handle )
1089             dlclose(ref->handle);
1090     }
1091 #endif
1092
1093     /* free loaded dlls array */
1094     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1095
1096     /* free library paths */
1097     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1098     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1099
1100     /* free include paths */
1101     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1102     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1103     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1104
1105     tcc_free(s1->tcc_lib_path);
1106     tcc_free(s1->soname);
1107     tcc_free(s1->rpath);
1108     tcc_free(s1->init_symbol);
1109     tcc_free(s1->fini_symbol);
1110     tcc_free(s1->outfile);
1111     tcc_free(s1->deps_outfile);
1112     dynarray_reset(&s1->files, &s1->nb_files);
1113     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1114
1115 #ifdef TCC_IS_NATIVE
1116 # ifdef HAVE_SELINUX
1117     munmap (s1->write_mem, s1->mem_size);
1118     munmap (s1->runtime_mem, s1->mem_size);
1119 # else
1120     tcc_free(s1->runtime_mem);
1121 # endif
1122 #endif
1123
1124     if(s1->sym_attrs) tcc_free(s1->sym_attrs);
1125
1126     tcc_free(s1);
1127 }
1128
1129 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1130 {
1131     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1132     return 0;
1133 }
1134
1135 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1136 {
1137     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1138     return 0;
1139 }
1140
1141 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags, int filetype)
1142 {
1143     ElfW(Ehdr) ehdr;
1144     int fd, ret, size;
1145
1146     parse_flags = 0;
1147 #ifdef CONFIG_TCC_ASM
1148     /* if .S file, define __ASSEMBLER__ like gcc does */
1149     if ((filetype == TCC_FILETYPE_ASM) || (filetype == TCC_FILETYPE_ASM_PP)) {
1150         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1151         parse_flags = PARSE_FLAG_ASM_FILE;
1152     }
1153 #endif
1154
1155     /* open the file */
1156     ret = tcc_open(s1, filename);
1157     if (ret < 0) {
1158         if (flags & AFF_PRINT_ERROR)
1159             tcc_error_noabort("file '%s' not found", filename);
1160         return ret;
1161     }
1162
1163     /* update target deps */
1164     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1165             tcc_strdup(filename));
1166
1167     if (flags & AFF_PREPROCESS) {
1168         ret = tcc_preprocess(s1);
1169         goto the_end;
1170     }
1171
1172     if (filetype == TCC_FILETYPE_C) {
1173         /* C file assumed */
1174         ret = tcc_compile(s1);
1175         goto the_end;
1176     }
1177
1178 #ifdef CONFIG_TCC_ASM
1179     if (filetype == TCC_FILETYPE_ASM_PP) {
1180         /* non preprocessed assembler */
1181         ret = tcc_assemble(s1, 1);
1182         goto the_end;
1183     }
1184
1185     if (filetype == TCC_FILETYPE_ASM) {
1186         /* preprocessed assembler */
1187         ret = tcc_assemble(s1, 0);
1188         goto the_end;
1189     }
1190 #endif
1191
1192     fd = file->fd;
1193     /* assume executable format: auto guess file type */
1194     size = read(fd, &ehdr, sizeof(ehdr));
1195     lseek(fd, 0, SEEK_SET);
1196     if (size <= 0) {
1197         tcc_error_noabort("could not read header");
1198         goto the_end;
1199     }
1200
1201     if (size == sizeof(ehdr) &&
1202         ehdr.e_ident[0] == ELFMAG0 &&
1203         ehdr.e_ident[1] == ELFMAG1 &&
1204         ehdr.e_ident[2] == ELFMAG2 &&
1205         ehdr.e_ident[3] == ELFMAG3) {
1206
1207         /* do not display line number if error */
1208         file->line_num = 0;
1209         if (ehdr.e_type == ET_REL) {
1210             ret = tcc_load_object_file(s1, fd, 0);
1211             goto the_end;
1212
1213         }
1214 #ifndef TCC_TARGET_PE
1215         if (ehdr.e_type == ET_DYN) {
1216             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1217 #ifdef TCC_IS_NATIVE
1218                 void *h;
1219                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1220                 if (h)
1221 #endif
1222                     ret = 0;
1223             } else {
1224                 ret = tcc_load_dll(s1, fd, filename,
1225                                    (flags & AFF_REFERENCED_DLL) != 0);
1226             }
1227             goto the_end;
1228         }
1229 #endif
1230         tcc_error_noabort("unrecognized ELF file");
1231         goto the_end;
1232     }
1233
1234     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1235         file->line_num = 0; /* do not display line number if error */
1236         ret = tcc_load_archive(s1, fd);
1237         goto the_end;
1238     }
1239
1240 #ifdef TCC_TARGET_COFF
1241     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1242         ret = tcc_load_coff(s1, fd);
1243         goto the_end;
1244     }
1245 #endif
1246
1247 #ifdef TCC_TARGET_PE
1248     ret = pe_load_file(s1, filename, fd);
1249 #else
1250     /* as GNU ld, consider it is an ld script if not recognized */
1251     ret = tcc_load_ldscript(s1);
1252 #endif
1253     if (ret < 0)
1254         tcc_error_noabort("unrecognized file type");
1255
1256 the_end:
1257     tcc_close();
1258     return ret;
1259 }
1260
1261 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename, int filetype)
1262 {
1263     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1264         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS, filetype);
1265     else
1266         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR, filetype);
1267 }
1268
1269 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1270 {
1271     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1272     return 0;
1273 }
1274
1275 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1276     const char *filename, int flags, char **paths, int nb_paths)
1277 {
1278     char buf[1024];
1279     int i;
1280
1281     for(i = 0; i < nb_paths; i++) {
1282         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1283         if (tcc_add_file_internal(s, buf, flags, TCC_FILETYPE_BINARY) == 0)
1284             return 0;
1285     }
1286     return -1;
1287 }
1288
1289 /* find and load a dll. Return non zero if not found */
1290 /* XXX: add '-rpath' option support ? */
1291 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1292 {
1293     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1294         s->library_paths, s->nb_library_paths);
1295 }
1296
1297 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1298 {
1299     if (-1 == tcc_add_library_internal(s, "%s/%s",
1300         filename, 0, s->crt_paths, s->nb_crt_paths))
1301         tcc_error_noabort("file '%s' not found", filename);
1302     return 0;
1303 }
1304
1305 /* the library name is the same as the argument of the '-l' option */
1306 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1307 {
1308 #ifdef TCC_TARGET_PE
1309     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1310     const char **pp = s->static_link ? libs + 4 : libs;
1311 #else
1312     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1313     const char **pp = s->static_link ? libs + 1 : libs;
1314 #endif
1315     while (*pp) {
1316         if (0 == tcc_add_library_internal(s, *pp,
1317             libraryname, 0, s->library_paths, s->nb_library_paths))
1318             return 0;
1319         ++pp;
1320     }
1321     return -1;
1322 }
1323
1324 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1325 {
1326 #ifdef TCC_TARGET_PE
1327     /* On x86_64 'val' might not be reachable with a 32bit offset.
1328        So it is handled here as if it were in a DLL. */
1329     pe_putimport(s, 0, name, (uintptr_t)val);
1330 #else
1331     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1332         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1333         SHN_ABS, name);
1334 #endif
1335     return 0;
1336 }
1337
1338 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1339 {
1340     s->output_type = output_type;
1341     if (output_type == TCC_OUTPUT_PREPROCESS)
1342         print_defines();
1343
1344     if (!s->nostdinc) {
1345         /* default include paths */
1346         /* -isystem paths have already been handled */
1347         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1348     }
1349
1350     /* if bound checking, then add corresponding sections */
1351 #ifdef CONFIG_TCC_BCHECK
1352     if (s->do_bounds_check) {
1353         /* define symbol */
1354         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1355         /* create bounds sections */
1356         bounds_section = new_section(s, ".bounds",
1357                                      SHT_PROGBITS, SHF_ALLOC);
1358         lbounds_section = new_section(s, ".lbounds",
1359                                       SHT_PROGBITS, SHF_ALLOC);
1360     }
1361 #endif
1362
1363     if (s->char_is_unsigned) {
1364         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1365     }
1366
1367     /* add debug sections */
1368     if (s->do_debug) {
1369         /* stab symbols */
1370         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1371         stab_section->sh_entsize = sizeof(Stab_Sym);
1372         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1373         put_elf_str(stabstr_section, "");
1374         stab_section->link = stabstr_section;
1375         /* put first entry */
1376         put_stabs("", 0, 0, 0, 0);
1377     }
1378
1379     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1380 #ifdef TCC_TARGET_PE
1381 # ifdef _WIN32
1382     tcc_add_systemdir(s);
1383 # endif
1384 #else
1385     /* add libc crt1/crti objects */
1386     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1387         !s->nostdlib) {
1388         if (output_type != TCC_OUTPUT_DLL)
1389             tcc_add_crt(s, "crt1.o");
1390         tcc_add_crt(s, "crti.o");
1391     }
1392 #endif
1393
1394 #ifdef CONFIG_TCC_BCHECK
1395     if (s->do_bounds_check && (output_type == TCC_OUTPUT_EXE))
1396     {
1397         /* force a bcheck.o linking */
1398         addr_t func = TOK___bound_init;
1399         Sym *sym = external_global_sym(func, &func_old_type, 0);
1400         if (!sym->c)
1401             put_extern_sym(sym, NULL, 0, 0);
1402     }
1403 #endif
1404     return 0;
1405 }
1406
1407 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1408 {
1409     tcc_free(s->tcc_lib_path);
1410     s->tcc_lib_path = tcc_strdup(path);
1411 }
1412
1413 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1414 #define FD_INVERT 0x0002 /* invert value before storing */
1415
1416 typedef struct FlagDef {
1417     uint16_t offset;
1418     uint16_t flags;
1419     const char *name;
1420 } FlagDef;
1421
1422 static const FlagDef warning_defs[] = {
1423     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1424     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1425     { offsetof(TCCState, warn_error), 0, "error" },
1426     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1427       "implicit-function-declaration" },
1428 };
1429
1430 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1431                     const char *name, int value)
1432 {
1433     int i;
1434     const FlagDef *p;
1435     const char *r;
1436
1437     r = name;
1438     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1439         r += 3;
1440         value = !value;
1441     }
1442     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1443         if (!strcmp(r, p->name))
1444             goto found;
1445     }
1446     return -1;
1447  found:
1448     if (p->flags & FD_INVERT)
1449         value = !value;
1450     *(int *)((uint8_t *)s + p->offset) = value;
1451     return 0;
1452 }
1453
1454 /* set/reset a warning */
1455 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1456 {
1457     int i;
1458     const FlagDef *p;
1459
1460     if (!strcmp(warning_name, "all")) {
1461         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1462             if (p->flags & WD_ALL)
1463                 *(int *)((uint8_t *)s + p->offset) = 1;
1464         }
1465         return 0;
1466     } else {
1467         return set_flag(s, warning_defs, countof(warning_defs),
1468                         warning_name, value);
1469     }
1470 }
1471
1472 static const FlagDef flag_defs[] = {
1473     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1474     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1475     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1476     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1477     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1478     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1479     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1480 };
1481
1482 /* set/reset a flag */
1483 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1484 {
1485     return set_flag(s, flag_defs, countof(flag_defs),
1486                     flag_name, value);
1487 }
1488
1489
1490 static int strstart(const char *val, const char **str)
1491 {
1492     const char *p, *q;
1493     p = *str;
1494     q = val;
1495     while (*q) {
1496         if (*p != *q)
1497             return 0;
1498         p++;
1499         q++;
1500     }
1501     *str = p;
1502     return 1;
1503 }
1504
1505 /* Like strstart, but automatically takes into account that ld options can
1506  *
1507  * - start with double or single dash (e.g. '--soname' or '-soname')
1508  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1509  *   or '-Wl,-soname=x.so')
1510  *
1511  * you provide `val` always in 'option[=]' form (no leading -)
1512  */
1513 static int link_option(const char *str, const char *val, const char **ptr)
1514 {
1515     const char *p, *q;
1516
1517     /* there should be 1 or 2 dashes */
1518     if (*str++ != '-')
1519         return 0;
1520     if (*str == '-')
1521         str++;
1522
1523     /* then str & val should match (potentialy up to '=') */
1524     p = str;
1525     q = val;
1526
1527     while (*q != '\0' && *q != '=') {
1528         if (*p != *q)
1529             return 0;
1530         p++;
1531         q++;
1532     }
1533
1534     /* '=' near eos means ',' or '=' is ok */
1535     if (*q == '=') {
1536         if (*p != ',' && *p != '=')
1537             return 0;
1538         p++;
1539         q++;
1540     }
1541
1542     if (ptr)
1543         *ptr = p;
1544     return 1;
1545 }
1546
1547 static const char *skip_linker_arg(const char **str)
1548 {
1549     const char *s1 = *str;
1550     const char *s2 = strchr(s1, ',');
1551     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1552     return s2;
1553 }
1554
1555 static char *copy_linker_arg(const char *p)
1556 {
1557     const char *q = p;
1558     skip_linker_arg(&q);
1559     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1560 }
1561
1562 /* set linker options */
1563 static int tcc_set_linker(TCCState *s, const char *option)
1564 {
1565     while (option && *option) {
1566
1567         const char *p = option;
1568         char *end = NULL;
1569         int ignoring = 0;
1570
1571         if (link_option(option, "Bsymbolic", &p)) {
1572             s->symbolic = 1;
1573         } else if (link_option(option, "nostdlib", &p)) {
1574             s->nostdlib = 1;
1575         } else if (link_option(option, "fini=", &p)) {
1576             s->fini_symbol = copy_linker_arg(p);
1577             ignoring = 1;
1578         } else if (link_option(option, "image-base=", &p)
1579                 || link_option(option, "Ttext=", &p)) {
1580             s->text_addr = strtoull(p, &end, 16);
1581             s->has_text_addr = 1;
1582         } else if (link_option(option, "init=", &p)) {
1583             s->init_symbol = copy_linker_arg(p);
1584             ignoring = 1;
1585         } else if (link_option(option, "oformat=", &p)) {
1586 #if defined(TCC_TARGET_PE)
1587             if (strstart("pe-", &p)) {
1588 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1589             if (strstart("elf64-", &p)) {
1590 #else
1591             if (strstart("elf32-", &p)) {
1592 #endif
1593                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1594             } else if (!strcmp(p, "binary")) {
1595                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1596 #ifdef TCC_TARGET_COFF
1597             } else if (!strcmp(p, "coff")) {
1598                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1599 #endif
1600             } else
1601                 goto err;
1602
1603         } else if (link_option(option, "as-needed", &p)) {
1604             ignoring = 1;
1605         } else if (link_option(option, "O", &p)) {
1606             ignoring = 1;
1607         } else if (link_option(option, "rpath=", &p)) {
1608             s->rpath = copy_linker_arg(p);
1609         } else if (link_option(option, "section-alignment=", &p)) {
1610             s->section_align = strtoul(p, &end, 16);
1611         } else if (link_option(option, "soname=", &p)) {
1612             s->soname = copy_linker_arg(p);
1613 #ifdef TCC_TARGET_PE
1614         } else if (link_option(option, "file-alignment=", &p)) {
1615             s->pe_file_align = strtoul(p, &end, 16);
1616         } else if (link_option(option, "stack=", &p)) {
1617             s->pe_stack_size = strtoul(p, &end, 10);
1618         } else if (link_option(option, "subsystem=", &p)) {
1619 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1620             if (!strcmp(p, "native")) {
1621                 s->pe_subsystem = 1;
1622             } else if (!strcmp(p, "console")) {
1623                 s->pe_subsystem = 3;
1624             } else if (!strcmp(p, "gui")) {
1625                 s->pe_subsystem = 2;
1626             } else if (!strcmp(p, "posix")) {
1627                 s->pe_subsystem = 7;
1628             } else if (!strcmp(p, "efiapp")) {
1629                 s->pe_subsystem = 10;
1630             } else if (!strcmp(p, "efiboot")) {
1631                 s->pe_subsystem = 11;
1632             } else if (!strcmp(p, "efiruntime")) {
1633                 s->pe_subsystem = 12;
1634             } else if (!strcmp(p, "efirom")) {
1635                 s->pe_subsystem = 13;
1636 #elif defined(TCC_TARGET_ARM)
1637             if (!strcmp(p, "wince")) {
1638                 s->pe_subsystem = 9;
1639 #endif
1640             } else
1641                 goto err;
1642 #endif
1643         } else
1644             goto err;
1645
1646         if (ignoring && s->warn_unsupported) err: {
1647             char buf[100], *e;
1648             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1649             if (ignoring)
1650                 tcc_warning("unsupported linker option '%s'", buf);
1651             else
1652                 tcc_error("unsupported linker option '%s'", buf);
1653         }
1654         option = skip_linker_arg(&p);
1655     }
1656     return 0;
1657 }
1658
1659 typedef struct TCCOption {
1660     const char *name;
1661     uint16_t index;
1662     uint16_t flags;
1663 } TCCOption;
1664
1665 enum {
1666     TCC_OPTION_HELP,
1667     TCC_OPTION_I,
1668     TCC_OPTION_D,
1669     TCC_OPTION_U,
1670     TCC_OPTION_P,
1671     TCC_OPTION_L,
1672     TCC_OPTION_B,
1673     TCC_OPTION_l,
1674     TCC_OPTION_bench,
1675     TCC_OPTION_bt,
1676     TCC_OPTION_b,
1677     TCC_OPTION_g,
1678     TCC_OPTION_c,
1679     TCC_OPTION_dumpversion,
1680     TCC_OPTION_d,
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_Wl,
1690     TCC_OPTION_W,
1691     TCC_OPTION_O,
1692     TCC_OPTION_m,
1693     TCC_OPTION_f,
1694     TCC_OPTION_isystem,
1695     TCC_OPTION_nostdinc,
1696     TCC_OPTION_nostdlib,
1697     TCC_OPTION_print_search_dirs,
1698     TCC_OPTION_rdynamic,
1699     TCC_OPTION_pedantic,
1700     TCC_OPTION_pthread,
1701     TCC_OPTION_run,
1702     TCC_OPTION_v,
1703     TCC_OPTION_w,
1704     TCC_OPTION_pipe,
1705     TCC_OPTION_E,
1706     TCC_OPTION_MD,
1707     TCC_OPTION_MF,
1708     TCC_OPTION_x,
1709 };
1710
1711 #define TCC_OPTION_HAS_ARG 0x0001
1712 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1713
1714 static const TCCOption tcc_options[] = {
1715     { "h", TCC_OPTION_HELP, 0 },
1716     { "-help", TCC_OPTION_HELP, 0 },
1717     { "?", TCC_OPTION_HELP, 0 },
1718     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1719     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1720     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1721     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1722     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1723     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1724     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1725     { "bench", TCC_OPTION_bench, 0 },
1726 #ifdef CONFIG_TCC_BACKTRACE
1727     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1728 #endif
1729 #ifdef CONFIG_TCC_BCHECK
1730     { "b", TCC_OPTION_b, 0 },
1731 #endif
1732     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1733     { "c", TCC_OPTION_c, 0 },
1734     { "dumpversion", TCC_OPTION_dumpversion, 0},
1735     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1736 #ifdef TCC_TARGET_ARM
1737     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1738 #endif
1739     { "static", TCC_OPTION_static, 0 },
1740     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1741     { "shared", TCC_OPTION_shared, 0 },
1742     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1743     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1744     { "pedantic", TCC_OPTION_pedantic, 0},
1745     { "pthread", TCC_OPTION_pthread, 0},
1746     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1747     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1748     { "r", TCC_OPTION_r, 0 },
1749     { "s", TCC_OPTION_s, 0 },
1750     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1751     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1752     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1753     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1754     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1755     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1756     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1757     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1758     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1759     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1760     { "w", TCC_OPTION_w, 0 },
1761     { "pipe", TCC_OPTION_pipe, 0},
1762     { "E", TCC_OPTION_E, 0},
1763     { "MD", TCC_OPTION_MD, 0},
1764     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1765     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1766     { NULL, 0, 0 },
1767 };
1768
1769 static void parse_option_D(TCCState *s1, const char *optarg)
1770 {
1771     char *sym = tcc_strdup(optarg);
1772     char *value = strchr(sym, '=');
1773     if (value)
1774         *value++ = '\0';
1775     tcc_define_symbol(s1, sym, value);
1776     tcc_free(sym);
1777 }
1778
1779 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1780 {
1781     int len = strlen(filename);
1782     char *p = tcc_malloc(len + 2);
1783     if (filetype) {
1784         *p = filetype;
1785     }
1786     else {
1787         /* use a file extension to detect a filetype */
1788         const char *ext = tcc_fileextension(filename);
1789         if (ext[0]) {
1790             ext++;
1791             if (!strcmp(ext, "S"))
1792                 *p = TCC_FILETYPE_ASM_PP;
1793             else
1794             if (!strcmp(ext, "s"))
1795                 *p = TCC_FILETYPE_ASM;
1796             else
1797             if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1798                 *p = TCC_FILETYPE_C;
1799             else
1800                 *p = TCC_FILETYPE_BINARY;
1801         }
1802         else {
1803             *p = TCC_FILETYPE_C;
1804         }
1805     }
1806     strcpy(p+1, filename);
1807     dynarray_add((void ***)&s->files, &s->nb_files, p);
1808 }
1809
1810 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1811 {
1812     const TCCOption *popt;
1813     const char *optarg, *r;
1814     int run = 0;
1815     int pthread = 0;
1816     int optind = 0;
1817     int filetype = 0;
1818
1819     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1820     CString linker_arg;
1821     cstr_new(&linker_arg);
1822
1823     while (optind < argc) {
1824
1825         r = argv[optind++];
1826         if (r[0] != '-' || r[1] == '\0') {
1827             args_parser_add_file(s, r, filetype);
1828             if (run) {
1829                 optind--;
1830                 /* argv[0] will be this file */
1831                 break;
1832             }
1833             continue;
1834         }
1835
1836         /* find option in table */
1837         for(popt = tcc_options; ; ++popt) {
1838             const char *p1 = popt->name;
1839             const char *r1 = r + 1;
1840             if (p1 == NULL)
1841                 tcc_error("invalid option -- '%s'", r);
1842             if (!strstart(p1, &r1))
1843                 continue;
1844             optarg = r1;
1845             if (popt->flags & TCC_OPTION_HAS_ARG) {
1846                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1847                     if (optind >= argc)
1848                         tcc_error("argument to '%s' is missing", r);
1849                     optarg = argv[optind++];
1850                 }
1851             } else if (*r1 != '\0')
1852                 continue;
1853             break;
1854         }
1855
1856         switch(popt->index) {
1857         case TCC_OPTION_HELP:
1858             return 0;
1859         case TCC_OPTION_I:
1860             if (tcc_add_include_path(s, optarg) < 0)
1861                 tcc_error("too many include paths");
1862             break;
1863         case TCC_OPTION_D:
1864             parse_option_D(s, optarg);
1865             break;
1866         case TCC_OPTION_U:
1867             tcc_undefine_symbol(s, optarg);
1868             break;
1869         case TCC_OPTION_L:
1870             tcc_add_library_path(s, optarg);
1871             break;
1872         case TCC_OPTION_B:
1873             /* set tcc utilities path (mainly for tcc development) */
1874             tcc_set_lib_path(s, optarg);
1875             break;
1876         case TCC_OPTION_l:
1877             args_parser_add_file(s, r, TCC_FILETYPE_BINARY);
1878             s->nb_libraries++;
1879             break;
1880         case TCC_OPTION_pthread:
1881             parse_option_D(s, "_REENTRANT");
1882             pthread = 1;
1883             break;
1884         case TCC_OPTION_bench:
1885             s->do_bench = 1;
1886             break;
1887 #ifdef CONFIG_TCC_BACKTRACE
1888         case TCC_OPTION_bt:
1889             tcc_set_num_callers(atoi(optarg));
1890             break;
1891 #endif
1892 #ifdef CONFIG_TCC_BCHECK
1893         case TCC_OPTION_b:
1894             s->do_bounds_check = 1;
1895             s->do_debug = 1;
1896             break;
1897 #endif
1898         case TCC_OPTION_g:
1899             s->do_debug = 1;
1900             break;
1901         case TCC_OPTION_c:
1902             if (s->output_type)
1903                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
1904             s->output_type = TCC_OUTPUT_OBJ;
1905             break;
1906         case TCC_OPTION_d:
1907             if (*optarg != 'D') {
1908                 if (s->warn_unsupported)
1909                     goto unsupported_option;
1910                  tcc_error("invalid option -- '%s'", r);
1911             }
1912             s->dflag = 1;
1913             break;
1914 #ifdef TCC_TARGET_ARM
1915         case TCC_OPTION_float_abi:
1916             /* tcc doesn't support soft float yet */
1917             if (!strcmp(optarg, "softfp")) {
1918                 s->float_abi = ARM_SOFTFP_FLOAT;
1919                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1920             } else if (!strcmp(optarg, "hard"))
1921                 s->float_abi = ARM_HARD_FLOAT;
1922             else
1923                 tcc_error("unsupported float abi '%s'", optarg);
1924             break;
1925 #endif
1926         case TCC_OPTION_static:
1927             s->static_link = 1;
1928             break;
1929         case TCC_OPTION_std:
1930             /* silently ignore, a current purpose:
1931                allow to use a tcc as a reference compiler for "make test" */
1932             break;
1933         case TCC_OPTION_shared:
1934             if (s->output_type)
1935                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
1936             s->output_type = TCC_OUTPUT_DLL;
1937             break;
1938         case TCC_OPTION_soname:
1939             s->soname = tcc_strdup(optarg);
1940             break;
1941         case TCC_OPTION_m:
1942             s->option_m = tcc_strdup(optarg);
1943             break;
1944         case TCC_OPTION_o:
1945             s->outfile = tcc_strdup(optarg);
1946             break;
1947         case TCC_OPTION_r:
1948             /* generate a .o merging several output files */
1949             if (s->output_type)
1950                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
1951             s->option_r = 1;
1952             s->output_type = TCC_OUTPUT_OBJ;
1953             break;
1954         case TCC_OPTION_isystem:
1955             tcc_add_sysinclude_path(s, optarg);
1956             break;
1957         case TCC_OPTION_nostdinc:
1958             s->nostdinc = 1;
1959             break;
1960         case TCC_OPTION_nostdlib:
1961             s->nostdlib = 1;
1962             break;
1963         case TCC_OPTION_print_search_dirs:
1964             s->print_search_dirs = 1;
1965             break;
1966         case TCC_OPTION_run:
1967             if (s->output_type)
1968                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
1969             s->output_type = TCC_OUTPUT_MEMORY;
1970             tcc_set_options(s, optarg);
1971             run = 1;
1972             break;
1973         case TCC_OPTION_v:
1974             do ++s->verbose; while (*optarg++ == 'v');
1975             break;
1976         case TCC_OPTION_f:
1977             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1978                 goto unsupported_option;
1979             break;
1980         case TCC_OPTION_W:
1981             if (tcc_set_warning(s, optarg, 1) < 0 &&
1982                 s->warn_unsupported)
1983                 goto unsupported_option;
1984             break;
1985         case TCC_OPTION_w:
1986             s->warn_none = 1;
1987             break;
1988         case TCC_OPTION_rdynamic:
1989             s->rdynamic = 1;
1990             break;
1991         case TCC_OPTION_Wl:
1992             if (linker_arg.size)
1993                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1994             cstr_cat(&linker_arg, optarg);
1995             cstr_ccat(&linker_arg, '\0');
1996             break;
1997         case TCC_OPTION_E:
1998             if (s->output_type)
1999                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
2000             s->output_type = TCC_OUTPUT_PREPROCESS;
2001             break;
2002         case TCC_OPTION_P:
2003             s->Pflag = atoi(optarg) + 1;
2004             break;
2005         case TCC_OPTION_MD:
2006             s->gen_deps = 1;
2007             break;
2008         case TCC_OPTION_MF:
2009             s->deps_outfile = tcc_strdup(optarg);
2010             break;
2011         case TCC_OPTION_dumpversion:
2012             printf ("%s\n", TCC_VERSION);
2013             exit(0);
2014         case TCC_OPTION_s:
2015             s->do_strip = 1;
2016             break;
2017         case TCC_OPTION_x:
2018             if (*optarg == 'c')
2019                 filetype = TCC_FILETYPE_C;
2020             else
2021             if (*optarg == 'a')
2022                 filetype = TCC_FILETYPE_ASM_PP;
2023             else
2024             if (*optarg == 'n')
2025                 filetype = 0;
2026             else
2027                 tcc_warning("unsupported language '%s'", optarg);
2028             break;
2029         case TCC_OPTION_O:
2030         case TCC_OPTION_pedantic:
2031         case TCC_OPTION_pipe:
2032             /* ignored */
2033             break;
2034         default:
2035             if (s->warn_unsupported) {
2036             unsupported_option:
2037                 tcc_warning("unsupported option '%s'", r);
2038             }
2039             break;
2040         }
2041     }
2042
2043     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
2044         tcc_set_options(s, "-lpthread");
2045
2046     tcc_set_linker(s, (const char *)linker_arg.data);
2047     cstr_free(&linker_arg);
2048
2049     return optind;
2050 }
2051
2052 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
2053 {
2054     const char *s1;
2055     char **argv, *arg;
2056     int argc, len;
2057     int ret;
2058
2059     argc = 0, argv = NULL;
2060     for(;;) {
2061         while (is_space(*str))
2062             str++;
2063         if (*str == '\0')
2064             break;
2065         s1 = str;
2066         while (*str != '\0' && !is_space(*str))
2067             str++;
2068         len = str - s1;
2069         arg = tcc_malloc(len + 1);
2070         pstrncpy(arg, s1, len);
2071         dynarray_add((void ***)&argv, &argc, arg);
2072     }
2073     ret = tcc_parse_args(s, argc, argv);
2074     dynarray_reset(&argv, &argc);
2075     return ret;
2076 }
2077
2078 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2079 {
2080     double tt;
2081     tt = (double)total_time / 1000000.0;
2082     if (tt < 0.001)
2083         tt = 0.001;
2084     if (total_bytes < 1)
2085         total_bytes = 1;
2086     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2087            tok_ident - TOK_IDENT, total_lines, total_bytes,
2088            tt, (int)(total_lines / tt),
2089            total_bytes / tt / 1000000.0);
2090 }
2091
2092 PUB_FUNC void tcc_set_environment(TCCState *s)
2093 {
2094     char * path;
2095
2096     path = getenv("C_INCLUDE_PATH");
2097     if(path != NULL) {
2098         tcc_add_include_path(s, path);
2099     }
2100     path = getenv("CPATH");
2101     if(path != NULL) {
2102         tcc_add_include_path(s, path);
2103     }
2104     path = getenv("LIBRARY_PATH");
2105     if(path != NULL) {
2106         tcc_add_library_path(s, path);
2107     }
2108 }