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     tcc_memstats();
1115 }
1116
1117 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1118 {
1119     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1120     return 0;
1121 }
1122
1123 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1124 {
1125     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1126     return 0;
1127 }
1128
1129 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags, int filetype)
1130 {
1131     ElfW(Ehdr) ehdr;
1132     int fd, ret, size;
1133
1134     parse_flags = 0;
1135 #ifdef CONFIG_TCC_ASM
1136     /* if .S file, define __ASSEMBLER__ like gcc does */
1137     if ((filetype == TCC_FILETYPE_ASM) || (filetype == TCC_FILETYPE_ASM_PP)) {
1138         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1139         parse_flags = PARSE_FLAG_ASM_FILE;
1140     }
1141 #endif
1142
1143     /* open the file */
1144     ret = tcc_open(s1, filename);
1145     if (ret < 0) {
1146         if (flags & AFF_PRINT_ERROR)
1147             tcc_error_noabort("file '%s' not found", filename);
1148         return ret;
1149     }
1150
1151     /* update target deps */
1152     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1153             tcc_strdup(filename));
1154
1155     if (flags & AFF_PREPROCESS) {
1156         ret = tcc_preprocess(s1);
1157         goto the_end;
1158     }
1159
1160     if (filetype == TCC_FILETYPE_C) {
1161         /* C file assumed */
1162         ret = tcc_compile(s1);
1163         goto the_end;
1164     }
1165
1166 #ifdef CONFIG_TCC_ASM
1167     if (filetype == TCC_FILETYPE_ASM_PP) {
1168         /* non preprocessed assembler */
1169         ret = tcc_assemble(s1, 1);
1170         goto the_end;
1171     }
1172
1173     if (filetype == TCC_FILETYPE_ASM) {
1174         /* preprocessed assembler */
1175         ret = tcc_assemble(s1, 0);
1176         goto the_end;
1177     }
1178 #endif
1179
1180     fd = file->fd;
1181     /* assume executable format: auto guess file type */
1182     size = read(fd, &ehdr, sizeof(ehdr));
1183     lseek(fd, 0, SEEK_SET);
1184     if (size <= 0) {
1185         tcc_error_noabort("could not read header");
1186         goto the_end;
1187     }
1188
1189     if (size == sizeof(ehdr) &&
1190         ehdr.e_ident[0] == ELFMAG0 &&
1191         ehdr.e_ident[1] == ELFMAG1 &&
1192         ehdr.e_ident[2] == ELFMAG2 &&
1193         ehdr.e_ident[3] == ELFMAG3) {
1194
1195         /* do not display line number if error */
1196         file->line_num = 0;
1197         if (ehdr.e_type == ET_REL) {
1198             ret = tcc_load_object_file(s1, fd, 0);
1199             goto the_end;
1200
1201         }
1202 #ifndef TCC_TARGET_PE
1203         if (ehdr.e_type == ET_DYN) {
1204             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1205 #ifdef TCC_IS_NATIVE
1206                 void *h;
1207                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1208                 if (h)
1209 #endif
1210                     ret = 0;
1211             } else {
1212                 ret = tcc_load_dll(s1, fd, filename,
1213                                    (flags & AFF_REFERENCED_DLL) != 0);
1214             }
1215             goto the_end;
1216         }
1217 #endif
1218         tcc_error_noabort("unrecognized ELF file");
1219         goto the_end;
1220     }
1221
1222     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1223         file->line_num = 0; /* do not display line number if error */
1224         ret = tcc_load_archive(s1, fd);
1225         goto the_end;
1226     }
1227
1228 #ifdef TCC_TARGET_COFF
1229     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1230         ret = tcc_load_coff(s1, fd);
1231         goto the_end;
1232     }
1233 #endif
1234
1235 #ifdef TCC_TARGET_PE
1236     ret = pe_load_file(s1, filename, fd);
1237 #else
1238     /* as GNU ld, consider it is an ld script if not recognized */
1239     ret = tcc_load_ldscript(s1);
1240 #endif
1241     if (ret < 0)
1242         tcc_error_noabort("unrecognized file type");
1243
1244 the_end:
1245     tcc_close();
1246     return ret;
1247 }
1248
1249 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename, int filetype)
1250 {
1251     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1252         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS, filetype);
1253     else
1254         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR, filetype);
1255 }
1256
1257 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1258 {
1259     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1260     return 0;
1261 }
1262
1263 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1264     const char *filename, int flags, char **paths, int nb_paths)
1265 {
1266     char buf[1024];
1267     int i;
1268
1269     for(i = 0; i < nb_paths; i++) {
1270         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1271         if (tcc_add_file_internal(s, buf, flags, TCC_FILETYPE_BINARY) == 0)
1272             return 0;
1273     }
1274     return -1;
1275 }
1276
1277 #ifndef TCC_TARGET_PE
1278 /* find and load a dll. Return non zero if not found */
1279 /* XXX: add '-rpath' option support ? */
1280 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1281 {
1282     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1283         s->library_paths, s->nb_library_paths);
1284 }
1285 #endif
1286
1287 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1288 {
1289     if (-1 == tcc_add_library_internal(s, "%s/%s",
1290         filename, 0, s->crt_paths, s->nb_crt_paths))
1291         tcc_error_noabort("file '%s' not found", filename);
1292     return 0;
1293 }
1294
1295 /* the library name is the same as the argument of the '-l' option */
1296 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1297 {
1298 #ifdef TCC_TARGET_PE
1299     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1300     const char **pp = s->static_link ? libs + 4 : libs;
1301 #else
1302     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1303     const char **pp = s->static_link ? libs + 1 : libs;
1304 #endif
1305     while (*pp) {
1306         if (0 == tcc_add_library_internal(s, *pp,
1307             libraryname, 0, s->library_paths, s->nb_library_paths))
1308             return 0;
1309         ++pp;
1310     }
1311     return -1;
1312 }
1313
1314 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1315 {
1316     int ret = tcc_add_library(s, libname);
1317     if (ret < 0)
1318         tcc_error_noabort("cannot find library 'lib%s'", libname);
1319     return ret;
1320 }
1321
1322 /* habdle #pragma comment(lib,) */
1323 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1324 {
1325     int i;
1326     for (i = 0; i < s1->nb_pragma_libs; i++)
1327         tcc_add_library_err(s1, s1->pragma_libs[i]);
1328 }
1329
1330 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1331 {
1332 #ifdef TCC_TARGET_PE
1333     /* On x86_64 'val' might not be reachable with a 32bit offset.
1334        So it is handled here as if it were in a DLL. */
1335     pe_putimport(s, 0, name, (uintptr_t)val);
1336 #else
1337     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1338         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1339         SHN_ABS, name);
1340 #endif
1341     return 0;
1342 }
1343
1344 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1345 {
1346     s->output_type = output_type;
1347
1348     if (!s->nostdinc) {
1349         /* default include paths */
1350         /* -isystem paths have already been handled */
1351         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1352     }
1353
1354     /* if bound checking, then add corresponding sections */
1355 #ifdef CONFIG_TCC_BCHECK
1356     if (s->do_bounds_check) {
1357         /* define symbol */
1358         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1359         /* create bounds sections */
1360         bounds_section = new_section(s, ".bounds",
1361                                      SHT_PROGBITS, SHF_ALLOC);
1362         lbounds_section = new_section(s, ".lbounds",
1363                                       SHT_PROGBITS, SHF_ALLOC);
1364     }
1365 #endif
1366
1367     if (s->char_is_unsigned) {
1368         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1369     }
1370
1371     /* add debug sections */
1372     if (s->do_debug) {
1373         /* stab symbols */
1374         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1375         stab_section->sh_entsize = sizeof(Stab_Sym);
1376         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1377         put_elf_str(stabstr_section, "");
1378         stab_section->link = stabstr_section;
1379         /* put first entry */
1380         put_stabs("", 0, 0, 0, 0);
1381     }
1382
1383     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1384 #ifdef TCC_TARGET_PE
1385 # ifdef _WIN32
1386     tcc_add_systemdir(s);
1387 # endif
1388 #else
1389     /* add libc crt1/crti objects */
1390     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1391         !s->nostdlib) {
1392         if (output_type != TCC_OUTPUT_DLL)
1393             tcc_add_crt(s, "crt1.o");
1394         tcc_add_crt(s, "crti.o");
1395     }
1396 #endif
1397
1398 #ifdef CONFIG_TCC_BCHECK
1399     if (s->do_bounds_check && (output_type == TCC_OUTPUT_EXE))
1400     {
1401         /* force a bcheck.o linking */
1402         addr_t func = TOK___bound_init;
1403         Sym *sym = external_global_sym(func, &func_old_type, 0);
1404         if (!sym->c)
1405             put_extern_sym(sym, NULL, 0, 0);
1406     }
1407 #endif
1408     return 0;
1409 }
1410
1411 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1412 {
1413     tcc_free(s->tcc_lib_path);
1414     s->tcc_lib_path = tcc_strdup(path);
1415 }
1416
1417 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1418 #define FD_INVERT 0x0002 /* invert value before storing */
1419
1420 typedef struct FlagDef {
1421     uint16_t offset;
1422     uint16_t flags;
1423     const char *name;
1424 } FlagDef;
1425
1426 static const FlagDef warning_defs[] = {
1427     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1428     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1429     { offsetof(TCCState, warn_error), 0, "error" },
1430     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1431       "implicit-function-declaration" },
1432 };
1433
1434 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1435                     const char *name, int value)
1436 {
1437     int i;
1438     const FlagDef *p;
1439     const char *r;
1440
1441     r = name;
1442     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1443         r += 3;
1444         value = !value;
1445     }
1446     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1447         if (!strcmp(r, p->name))
1448             goto found;
1449     }
1450     return -1;
1451  found:
1452     if (p->flags & FD_INVERT)
1453         value = !value;
1454     *(int *)((uint8_t *)s + p->offset) = value;
1455     return 0;
1456 }
1457
1458 /* set/reset a warning */
1459 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1460 {
1461     int i;
1462     const FlagDef *p;
1463
1464     if (!strcmp(warning_name, "all")) {
1465         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1466             if (p->flags & WD_ALL)
1467                 *(int *)((uint8_t *)s + p->offset) = 1;
1468         }
1469         return 0;
1470     } else {
1471         return set_flag(s, warning_defs, countof(warning_defs),
1472                         warning_name, value);
1473     }
1474 }
1475
1476 static const FlagDef flag_defs[] = {
1477     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1478     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1479     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1480     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1481     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1482     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1483     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1484 };
1485
1486 /* set/reset a flag */
1487 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1488 {
1489     return set_flag(s, flag_defs, countof(flag_defs),
1490                     flag_name, value);
1491 }
1492
1493
1494 static int strstart(const char *val, const char **str)
1495 {
1496     const char *p, *q;
1497     p = *str;
1498     q = val;
1499     while (*q) {
1500         if (*p != *q)
1501             return 0;
1502         p++;
1503         q++;
1504     }
1505     *str = p;
1506     return 1;
1507 }
1508
1509 /* Like strstart, but automatically takes into account that ld options can
1510  *
1511  * - start with double or single dash (e.g. '--soname' or '-soname')
1512  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1513  *   or '-Wl,-soname=x.so')
1514  *
1515  * you provide `val` always in 'option[=]' form (no leading -)
1516  */
1517 static int link_option(const char *str, const char *val, const char **ptr)
1518 {
1519     const char *p, *q;
1520
1521     /* there should be 1 or 2 dashes */
1522     if (*str++ != '-')
1523         return 0;
1524     if (*str == '-')
1525         str++;
1526
1527     /* then str & val should match (potentialy up to '=') */
1528     p = str;
1529     q = val;
1530
1531     while (*q != '\0' && *q != '=') {
1532         if (*p != *q)
1533             return 0;
1534         p++;
1535         q++;
1536     }
1537
1538     /* '=' near eos means ',' or '=' is ok */
1539     if (*q == '=') {
1540         if (*p != ',' && *p != '=')
1541             return 0;
1542         p++;
1543         q++;
1544     }
1545
1546     if (ptr)
1547         *ptr = p;
1548     return 1;
1549 }
1550
1551 static const char *skip_linker_arg(const char **str)
1552 {
1553     const char *s1 = *str;
1554     const char *s2 = strchr(s1, ',');
1555     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1556     return s2;
1557 }
1558
1559 static char *copy_linker_arg(const char *p)
1560 {
1561     const char *q = p;
1562     skip_linker_arg(&q);
1563     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1564 }
1565
1566 /* set linker options */
1567 static int tcc_set_linker(TCCState *s, const char *option)
1568 {
1569     while (option && *option) {
1570
1571         const char *p = option;
1572         char *end = NULL;
1573         int ignoring = 0;
1574
1575         if (link_option(option, "Bsymbolic", &p)) {
1576             s->symbolic = 1;
1577         } else if (link_option(option, "nostdlib", &p)) {
1578             s->nostdlib = 1;
1579         } else if (link_option(option, "fini=", &p)) {
1580             s->fini_symbol = copy_linker_arg(p);
1581             ignoring = 1;
1582         } else if (link_option(option, "image-base=", &p)
1583                 || link_option(option, "Ttext=", &p)) {
1584             s->text_addr = strtoull(p, &end, 16);
1585             s->has_text_addr = 1;
1586         } else if (link_option(option, "init=", &p)) {
1587             s->init_symbol = copy_linker_arg(p);
1588             ignoring = 1;
1589         } else if (link_option(option, "oformat=", &p)) {
1590 #if defined(TCC_TARGET_PE)
1591             if (strstart("pe-", &p)) {
1592 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1593             if (strstart("elf64-", &p)) {
1594 #else
1595             if (strstart("elf32-", &p)) {
1596 #endif
1597                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1598             } else if (!strcmp(p, "binary")) {
1599                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1600 #ifdef TCC_TARGET_COFF
1601             } else if (!strcmp(p, "coff")) {
1602                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1603 #endif
1604             } else
1605                 goto err;
1606
1607         } else if (link_option(option, "as-needed", &p)) {
1608             ignoring = 1;
1609         } else if (link_option(option, "O", &p)) {
1610             ignoring = 1;
1611         } else if (link_option(option, "rpath=", &p)) {
1612             s->rpath = copy_linker_arg(p);
1613         } else if (link_option(option, "section-alignment=", &p)) {
1614             s->section_align = strtoul(p, &end, 16);
1615         } else if (link_option(option, "soname=", &p)) {
1616             s->soname = copy_linker_arg(p);
1617 #ifdef TCC_TARGET_PE
1618         } else if (link_option(option, "file-alignment=", &p)) {
1619             s->pe_file_align = strtoul(p, &end, 16);
1620         } else if (link_option(option, "stack=", &p)) {
1621             s->pe_stack_size = strtoul(p, &end, 10);
1622         } else if (link_option(option, "subsystem=", &p)) {
1623 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1624             if (!strcmp(p, "native")) {
1625                 s->pe_subsystem = 1;
1626             } else if (!strcmp(p, "console")) {
1627                 s->pe_subsystem = 3;
1628             } else if (!strcmp(p, "gui")) {
1629                 s->pe_subsystem = 2;
1630             } else if (!strcmp(p, "posix")) {
1631                 s->pe_subsystem = 7;
1632             } else if (!strcmp(p, "efiapp")) {
1633                 s->pe_subsystem = 10;
1634             } else if (!strcmp(p, "efiboot")) {
1635                 s->pe_subsystem = 11;
1636             } else if (!strcmp(p, "efiruntime")) {
1637                 s->pe_subsystem = 12;
1638             } else if (!strcmp(p, "efirom")) {
1639                 s->pe_subsystem = 13;
1640 #elif defined(TCC_TARGET_ARM)
1641             if (!strcmp(p, "wince")) {
1642                 s->pe_subsystem = 9;
1643 #endif
1644             } else
1645                 goto err;
1646 #endif
1647         } else
1648             goto err;
1649
1650         if (ignoring && s->warn_unsupported) err: {
1651             char buf[100], *e;
1652             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1653             if (ignoring)
1654                 tcc_warning("unsupported linker option '%s'", buf);
1655             else
1656                 tcc_error("unsupported linker option '%s'", buf);
1657         }
1658         option = skip_linker_arg(&p);
1659     }
1660     return 0;
1661 }
1662
1663 typedef struct TCCOption {
1664     const char *name;
1665     uint16_t index;
1666     uint16_t flags;
1667 } TCCOption;
1668
1669 enum {
1670     TCC_OPTION_HELP,
1671     TCC_OPTION_I,
1672     TCC_OPTION_D,
1673     TCC_OPTION_U,
1674     TCC_OPTION_P,
1675     TCC_OPTION_L,
1676     TCC_OPTION_B,
1677     TCC_OPTION_l,
1678     TCC_OPTION_bench,
1679     TCC_OPTION_bt,
1680     TCC_OPTION_b,
1681     TCC_OPTION_g,
1682     TCC_OPTION_c,
1683     TCC_OPTION_dumpversion,
1684     TCC_OPTION_float_abi,
1685     TCC_OPTION_static,
1686     TCC_OPTION_std,
1687     TCC_OPTION_shared,
1688     TCC_OPTION_soname,
1689     TCC_OPTION_o,
1690     TCC_OPTION_r,
1691     TCC_OPTION_s,
1692     TCC_OPTION_traditional,
1693     TCC_OPTION_Wl,
1694     TCC_OPTION_W,
1695     TCC_OPTION_O,
1696     TCC_OPTION_m,
1697     TCC_OPTION_f,
1698     TCC_OPTION_isystem,
1699     TCC_OPTION_iwithprefix,
1700     TCC_OPTION_nostdinc,
1701     TCC_OPTION_nostdlib,
1702     TCC_OPTION_print_search_dirs,
1703     TCC_OPTION_rdynamic,
1704     TCC_OPTION_pedantic,
1705     TCC_OPTION_pthread,
1706     TCC_OPTION_run,
1707     TCC_OPTION_v,
1708     TCC_OPTION_w,
1709     TCC_OPTION_pipe,
1710     TCC_OPTION_E,
1711     TCC_OPTION_MD,
1712     TCC_OPTION_MF,
1713     TCC_OPTION_x,
1714 };
1715
1716 #define TCC_OPTION_HAS_ARG 0x0001
1717 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1718
1719 static const TCCOption tcc_options[] = {
1720     { "h", TCC_OPTION_HELP, 0 },
1721     { "-help", TCC_OPTION_HELP, 0 },
1722     { "?", TCC_OPTION_HELP, 0 },
1723     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1724     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1725     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1726     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1727     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1728     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1729     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1730     { "bench", TCC_OPTION_bench, 0 },
1731 #ifdef CONFIG_TCC_BACKTRACE
1732     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1733 #endif
1734 #ifdef CONFIG_TCC_BCHECK
1735     { "b", TCC_OPTION_b, 0 },
1736 #endif
1737     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1738     { "c", TCC_OPTION_c, 0 },
1739     { "dumpversion", TCC_OPTION_dumpversion, 0},
1740 #ifdef TCC_TARGET_ARM
1741     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1742 #endif
1743     { "static", TCC_OPTION_static, 0 },
1744     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1745     { "shared", TCC_OPTION_shared, 0 },
1746     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1747     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1748     { "pedantic", TCC_OPTION_pedantic, 0},
1749     { "pthread", TCC_OPTION_pthread, 0},
1750     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1751     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1752     { "r", TCC_OPTION_r, 0 },
1753     { "s", TCC_OPTION_s, 0 },
1754     { "traditional", TCC_OPTION_traditional, 0 },
1755     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1756     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1757     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1758     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1759     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1760     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1761     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
1762     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1763     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1764     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1765     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1766     { "w", TCC_OPTION_w, 0 },
1767     { "pipe", TCC_OPTION_pipe, 0},
1768     { "E", TCC_OPTION_E, 0},
1769     { "MD", TCC_OPTION_MD, 0},
1770     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1771     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1772     { NULL, 0, 0 },
1773 };
1774
1775 static void parse_option_D(TCCState *s1, const char *optarg)
1776 {
1777     char *sym = tcc_strdup(optarg);
1778     char *value = strchr(sym, '=');
1779     if (value)
1780         *value++ = '\0';
1781     tcc_define_symbol(s1, sym, value);
1782     tcc_free(sym);
1783 }
1784
1785 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1786 {
1787     int len = strlen(filename);
1788     char *p = tcc_malloc(len + 2);
1789     if (filetype) {
1790         *p = filetype;
1791     }
1792     else {
1793         /* use a file extension to detect a filetype */
1794         const char *ext = tcc_fileextension(filename);
1795         if (ext[0]) {
1796             ext++;
1797             if (!strcmp(ext, "S"))
1798                 *p = TCC_FILETYPE_ASM_PP;
1799             else
1800             if (!strcmp(ext, "s"))
1801                 *p = TCC_FILETYPE_ASM;
1802             else
1803             if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1804                 *p = TCC_FILETYPE_C;
1805             else
1806                 *p = TCC_FILETYPE_BINARY;
1807         }
1808         else {
1809             *p = TCC_FILETYPE_C;
1810         }
1811     }
1812     strcpy(p+1, filename);
1813     dynarray_add((void ***)&s->files, &s->nb_files, p);
1814 }
1815
1816 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1817 {
1818     const TCCOption *popt;
1819     const char *optarg, *r;
1820     int run = 0;
1821     int pthread = 0;
1822     int optind = 0;
1823     int filetype = 0;
1824
1825     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1826     CString linker_arg;
1827     cstr_new(&linker_arg);
1828
1829     while (optind < argc) {
1830
1831         r = argv[optind++];
1832         if (r[0] != '-' || r[1] == '\0') {
1833             args_parser_add_file(s, r, filetype);
1834             if (run) {
1835                 optind--;
1836                 /* argv[0] will be this file */
1837                 break;
1838             }
1839             continue;
1840         }
1841
1842         /* find option in table */
1843         for(popt = tcc_options; ; ++popt) {
1844             const char *p1 = popt->name;
1845             const char *r1 = r + 1;
1846             if (p1 == NULL)
1847                 tcc_error("invalid option -- '%s'", r);
1848             if (!strstart(p1, &r1))
1849                 continue;
1850             optarg = r1;
1851             if (popt->flags & TCC_OPTION_HAS_ARG) {
1852                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1853                     if (optind >= argc)
1854                         tcc_error("argument to '%s' is missing", r);
1855                     optarg = argv[optind++];
1856                 }
1857             } else if (*r1 != '\0')
1858                 continue;
1859             break;
1860         }
1861
1862         switch(popt->index) {
1863         case TCC_OPTION_HELP:
1864             return 0;
1865         case TCC_OPTION_I:
1866             tcc_add_include_path(s, optarg);
1867             break;
1868         case TCC_OPTION_D:
1869             parse_option_D(s, optarg);
1870             break;
1871         case TCC_OPTION_U:
1872             tcc_undefine_symbol(s, optarg);
1873             break;
1874         case TCC_OPTION_L:
1875             tcc_add_library_path(s, optarg);
1876             break;
1877         case TCC_OPTION_B:
1878             /* set tcc utilities path (mainly for tcc development) */
1879             tcc_set_lib_path(s, optarg);
1880             break;
1881         case TCC_OPTION_l:
1882             args_parser_add_file(s, r, TCC_FILETYPE_BINARY);
1883             s->nb_libraries++;
1884             break;
1885         case TCC_OPTION_pthread:
1886             parse_option_D(s, "_REENTRANT");
1887             pthread = 1;
1888             break;
1889         case TCC_OPTION_bench:
1890             s->do_bench = 1;
1891             break;
1892 #ifdef CONFIG_TCC_BACKTRACE
1893         case TCC_OPTION_bt:
1894             tcc_set_num_callers(atoi(optarg));
1895             break;
1896 #endif
1897 #ifdef CONFIG_TCC_BCHECK
1898         case TCC_OPTION_b:
1899             s->do_bounds_check = 1;
1900             s->do_debug = 1;
1901             break;
1902 #endif
1903         case TCC_OPTION_g:
1904             s->do_debug = 1;
1905             break;
1906         case TCC_OPTION_c:
1907             if (s->output_type)
1908                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
1909             s->output_type = TCC_OUTPUT_OBJ;
1910             break;
1911 #ifdef TCC_TARGET_ARM
1912         case TCC_OPTION_float_abi:
1913             /* tcc doesn't support soft float yet */
1914             if (!strcmp(optarg, "softfp")) {
1915                 s->float_abi = ARM_SOFTFP_FLOAT;
1916                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1917             } else if (!strcmp(optarg, "hard"))
1918                 s->float_abi = ARM_HARD_FLOAT;
1919             else
1920                 tcc_error("unsupported float abi '%s'", optarg);
1921             break;
1922 #endif
1923         case TCC_OPTION_static:
1924             s->static_link = 1;
1925             break;
1926         case TCC_OPTION_std:
1927             /* silently ignore, a current purpose:
1928                allow to use a tcc as a reference compiler for "make test" */
1929             break;
1930         case TCC_OPTION_shared:
1931             if (s->output_type)
1932                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
1933             s->output_type = TCC_OUTPUT_DLL;
1934             break;
1935         case TCC_OPTION_soname:
1936             s->soname = tcc_strdup(optarg);
1937             break;
1938         case TCC_OPTION_m:
1939             s->option_m = tcc_strdup(optarg);
1940             break;
1941         case TCC_OPTION_o:
1942             if (s->outfile) {
1943                 tcc_warning("multiple -o option");
1944                 tcc_free(s->outfile);
1945             }
1946             s->outfile = tcc_strdup(optarg);
1947             break;
1948         case TCC_OPTION_r:
1949             /* generate a .o merging several output files */
1950             if (s->output_type)
1951                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
1952             s->option_r = 1;
1953             s->output_type = TCC_OUTPUT_OBJ;
1954             break;
1955         case TCC_OPTION_isystem:
1956             tcc_add_sysinclude_path(s, optarg);
1957             break;
1958         case TCC_OPTION_iwithprefix:
1959             if (1) {
1960                 char buf[1024];
1961                 int buf_size = sizeof(buf)-1;
1962                 char *p = &buf[0];
1963
1964                 char *sysroot = "{B}/";
1965                 int len = strlen(sysroot);
1966                 if (len > buf_size)
1967                     len = buf_size;
1968                 strncpy(p, sysroot, len);
1969                 p += len;
1970                 buf_size -= len;
1971
1972                 len = strlen(optarg);
1973                 if (len > buf_size)
1974                     len = buf_size;
1975                 strncpy(p, optarg, len+1);
1976                 tcc_add_sysinclude_path(s, buf);
1977             }
1978             break;
1979         case TCC_OPTION_nostdinc:
1980             s->nostdinc = 1;
1981             break;
1982         case TCC_OPTION_nostdlib:
1983             s->nostdlib = 1;
1984             break;
1985         case TCC_OPTION_print_search_dirs:
1986             s->print_search_dirs = 1;
1987             break;
1988         case TCC_OPTION_run:
1989             if (s->output_type)
1990                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
1991             s->output_type = TCC_OUTPUT_MEMORY;
1992             tcc_set_options(s, optarg);
1993             run = 1;
1994             break;
1995         case TCC_OPTION_v:
1996             do ++s->verbose; while (*optarg++ == 'v');
1997             break;
1998         case TCC_OPTION_f:
1999             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
2000                 goto unsupported_option;
2001             break;
2002         case TCC_OPTION_W:
2003             if (tcc_set_warning(s, optarg, 1) < 0 &&
2004                 s->warn_unsupported)
2005                 goto unsupported_option;
2006             break;
2007         case TCC_OPTION_w:
2008             s->warn_none = 1;
2009             break;
2010         case TCC_OPTION_rdynamic:
2011             s->rdynamic = 1;
2012             break;
2013         case TCC_OPTION_Wl:
2014             if (linker_arg.size)
2015                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
2016             cstr_cat(&linker_arg, optarg);
2017             cstr_ccat(&linker_arg, '\0');
2018             break;
2019         case TCC_OPTION_E:
2020             if (s->output_type)
2021                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
2022             s->output_type = TCC_OUTPUT_PREPROCESS;
2023             break;
2024         case TCC_OPTION_P:
2025             s->Pflag = atoi(optarg) + 1;
2026             break;
2027         case TCC_OPTION_MD:
2028             s->gen_deps = 1;
2029             break;
2030         case TCC_OPTION_MF:
2031             s->deps_outfile = tcc_strdup(optarg);
2032             break;
2033         case TCC_OPTION_dumpversion:
2034             printf ("%s\n", TCC_VERSION);
2035             exit(0);
2036         case TCC_OPTION_s:
2037             s->do_strip = 1;
2038             break;
2039         case TCC_OPTION_traditional:
2040             break;
2041         case TCC_OPTION_x:
2042             if (*optarg == 'c')
2043                 filetype = TCC_FILETYPE_C;
2044             else
2045             if (*optarg == 'a')
2046                 filetype = TCC_FILETYPE_ASM_PP;
2047             else
2048             if (*optarg == 'n')
2049                 filetype = 0;
2050             else
2051                 tcc_warning("unsupported language '%s'", optarg);
2052             break;
2053         case TCC_OPTION_O:
2054             if (1) {
2055                 int opt = atoi(optarg);
2056                 char *sym = "__OPTIMIZE__";
2057                 if (opt)
2058                     tcc_define_symbol(s, sym, 0);
2059                 else
2060                     tcc_undefine_symbol(s, sym);
2061             }
2062             break;
2063         case TCC_OPTION_pedantic:
2064         case TCC_OPTION_pipe:
2065             /* ignored */
2066             break;
2067         default:
2068             if (s->warn_unsupported) {
2069             unsupported_option:
2070                 tcc_warning("unsupported option '%s'", r);
2071             }
2072             break;
2073         }
2074     }
2075
2076     if (s->output_type == 0)
2077         s->output_type = TCC_OUTPUT_EXE;
2078
2079     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
2080         tcc_set_options(s, "-lpthread");
2081
2082     if (s->output_type == TCC_OUTPUT_EXE)
2083         tcc_set_linker(s, (const char *)linker_arg.data);
2084     cstr_free(&linker_arg);
2085
2086     return optind;
2087 }
2088
2089 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
2090 {
2091     const char *s1;
2092     char **argv, *arg;
2093     int argc, len;
2094     int ret;
2095
2096     argc = 0, argv = NULL;
2097     for(;;) {
2098         while (is_space(*str))
2099             str++;
2100         if (*str == '\0')
2101             break;
2102         s1 = str;
2103         while (*str != '\0' && !is_space(*str))
2104             str++;
2105         len = str - s1;
2106         arg = tcc_malloc(len + 1);
2107         pstrncpy(arg, s1, len);
2108         dynarray_add((void ***)&argv, &argc, arg);
2109     }
2110     ret = tcc_parse_args(s, argc, argv);
2111     dynarray_reset(&argv, &argc);
2112     return ret;
2113 }
2114
2115 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2116 {
2117     double tt;
2118     tt = (double)total_time / 1000000.0;
2119     if (tt < 0.001)
2120         tt = 0.001;
2121     if (total_bytes < 1)
2122         total_bytes = 1;
2123     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2124            tok_ident - TOK_IDENT, total_lines, total_bytes,
2125            tt, (int)(total_lines / tt),
2126            total_bytes / tt / 1000000.0);
2127 }
2128
2129 PUB_FUNC void tcc_set_environment(TCCState *s)
2130 {
2131     char * path;
2132
2133     path = getenv("C_INCLUDE_PATH");
2134     if(path != NULL) {
2135         tcc_add_include_path(s, path);
2136     }
2137     path = getenv("CPATH");
2138     if(path != NULL) {
2139         tcc_add_include_path(s, path);
2140     }
2141     path = getenv("LIBRARY_PATH");
2142     if(path != NULL) {
2143         tcc_add_library_path(s, path);
2144     }
2145 }