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, unsigned long size)
 392 {
 393     unsigned long 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     if (section == NULL)
 439         sh_num = SHN_UNDEF;
 440     else if (section == SECTION_ABS)
 441         sh_num = SHN_ABS;
 442     else
 443         sh_num = section->sh_num;
 444
 445     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 446         sym_type = STT_FUNC;
 447     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 448         sym_type = STT_NOTYPE;
 449     } else {
 450         sym_type = STT_OBJECT;
 451     }
 452
 453     if (sym->type.t & VT_STATIC)
 454         sym_bind = STB_LOCAL;
 455     else {
 456         if (sym->type.t & VT_WEAK)
 457             sym_bind = STB_WEAK;
 458         else
 459             sym_bind = STB_GLOBAL;
 460     }
 461
 462     if (!sym->c) {
 463         name = get_tok_str(sym->v, NULL);
 464 #ifdef CONFIG_TCC_BCHECK
 465         char buf[32];
 466         if (tcc_state->do_bounds_check) {
 467             /* XXX: avoid doing that for statics ? */
 468             /* if bound checking is activated, we change some function
 469                names by adding the "__bound" prefix */
 470             switch(sym->v) {
 471 #ifdef TCC_TARGET_PE
 472             /* XXX: we rely only on malloc hooks */
 473             case TOK_malloc:
 474             case TOK_free:
 475             case TOK_realloc:
 476             case TOK_memalign:
 477             case TOK_calloc:
 478 #endif
 479             case TOK_memcpy:
 480             case TOK_memmove:
 481             case TOK_memset:
 482             case TOK_strlen:
 483             case TOK_strcpy:
 484             case TOK_alloca:
 485                 strcpy(buf, "__bound_");
 486                 strcat(buf, name);
 487                 name = buf;
 488                 break;
 489             }
 490         }
 491 #endif
 492         other = 0;
 493
 494 #ifdef TCC_TARGET_PE
 495         if (sym->type.t & VT_EXPORT)
 496             other |= ST_PE_EXPORT;
 497         if (sym_type == STT_FUNC && sym->type.ref) {
 498             Sym *ref = sym->type.ref;
 499             if (ref->a.func_export)
 500                 other |= ST_PE_EXPORT;
 501             if (ref->a.func_call == FUNC_STDCALL && can_add_underscore) {
 502                 sprintf(buf1, "_%s@%d", name, ref->a.func_args * PTR_SIZE);
 503                 name = buf1;
 504                 other |= ST_PE_STDCALL;
 505                 can_add_underscore = 0;
 506             }
 507         } else {
 508             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 509                 other |= ST_PE_IMPORT;
 510             if (sym->type.t & VT_IMPORT)
 511                 other |= ST_PE_IMPORT;
 512         }
 513 #else
 514         if (! (sym->type.t & VT_STATIC))
 515             other = (sym->type.t & VT_VIS_MASK) >> VT_VIS_SHIFT;
 516 #endif
 517         if (tcc_state->leading_underscore && can_add_underscore) {
 518             buf1[0] = '_';
 519             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 520             name = buf1;
 521         }
 522         if (sym->asm_label) {
 523             name = sym->asm_label;
 524         }
 525         info = ELFW(ST_INFO)(sym_bind, sym_type);
 526         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 527     } else {
 528         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 529         esym->st_value = value;
 530         esym->st_size = size;
 531         esym->st_shndx = sh_num;
 532     }
 533 }
 534
 535 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 536                            addr_t value, unsigned long size)
 537 {
 538     put_extern_sym2(sym, section, value, size, 1);
 539 }
 540
 541 /* add a new relocation entry to symbol 'sym' in section 's' */
 542 ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type,
 543                      unsigned long addend)
 544 {
 545     int c = 0;
 546     if (sym) {
 547         if (0 == sym->c)
 548             put_extern_sym(sym, NULL, 0, 0);
 549         c = sym->c;
 550     }
 551     /* now we can add ELF relocation info */
 552     put_elf_reloca(symtab_section, s, offset, type, c, addend);
 553 }
 554
 555 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 556 {
 557     greloca(s, sym, offset, type, 0);
 558 }
 559
 560 /********************************************************/
 561
 562 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 563 {
 564     int len;
 565     len = strlen(buf);
 566     vsnprintf(buf + len, buf_size - len, fmt, ap);
 567 }
 568
 569 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 570 {
 571     va_list ap;
 572     va_start(ap, fmt);
 573     strcat_vprintf(buf, buf_size, fmt, ap);
 574     va_end(ap);
 575 }
 576
 577 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 578 {
 579     char buf[2048];
 580     BufferedFile **pf, *f;
 581
 582     buf[0] = '\0';
 583     /* use upper file if inline ":asm:" or token ":paste:" */
 584     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 585      ;
 586     if (f) {
 587         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 588             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 589                 (*pf)->filename, (*pf)->line_num);
 590         if (f->line_num > 0) {
 591             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 592                 f->filename, f->line_num);
 593         } else {
 594             strcat_printf(buf, sizeof(buf), "%s: ",
 595                 f->filename);
 596         }
 597     } else {
 598         strcat_printf(buf, sizeof(buf), "tcc: ");
 599     }
 600     if (is_warning)
 601         strcat_printf(buf, sizeof(buf), "warning: ");
 602     else
 603         strcat_printf(buf, sizeof(buf), "error: ");
 604     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 605
 606     if (!s1->error_func) {
 607         /* default case: stderr */
 608         fprintf(stderr, "%s\n", buf);
 609     } else {
 610         s1->error_func(s1->error_opaque, buf);
 611     }
 612     if (!is_warning || s1->warn_error)
 613         s1->nb_errors++;
 614 }
 615
 616 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 617                         void (*error_func)(void *opaque, const char *msg))
 618 {
 619     s->error_opaque = error_opaque;
 620     s->error_func = error_func;
 621 }
 622
 623 /* error without aborting current compilation */
 624 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 625 {
 626     TCCState *s1 = tcc_state;
 627     va_list ap;
 628
 629     va_start(ap, fmt);
 630     error1(s1, 0, fmt, ap);
 631     va_end(ap);
 632 }
 633
 634 PUB_FUNC void tcc_error(const char *fmt, ...)
 635 {
 636     TCCState *s1 = tcc_state;
 637     va_list ap;
 638
 639     va_start(ap, fmt);
 640     error1(s1, 0, fmt, ap);
 641     va_end(ap);
 642     /* better than nothing: in some cases, we accept to handle errors */
 643     if (s1->error_set_jmp_enabled) {
 644         longjmp(s1->error_jmp_buf, 1);
 645     } else {
 646         /* XXX: eliminate this someday */
 647         exit(1);
 648     }
 649 }
 650
 651 PUB_FUNC void tcc_warning(const char *fmt, ...)
 652 {
 653     TCCState *s1 = tcc_state;
 654     va_list ap;
 655
 656     if (s1->warn_none)
 657         return;
 658
 659     va_start(ap, fmt);
 660     error1(s1, 1, fmt, ap);
 661     va_end(ap);
 662 }
 663
 664 /********************************************************/
 665 /* I/O layer */
 666
 667 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 668 {
 669     BufferedFile *bf;
 670     int buflen = initlen ? initlen : IO_BUF_SIZE;
 671
 672     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 673     bf->buf_ptr = bf->buffer;
 674     bf->buf_end = bf->buffer + initlen;
 675     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 676     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 677 #ifdef _WIN32
 678     normalize_slashes(bf->filename);
 679 #endif
 680     bf->line_num = 1;
 681     bf->ifndef_macro = 0;
 682     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 683     bf->fd = -1;
 684     bf->prev = file;
 685     file = bf;
 686 }
 687
 688 ST_FUNC void tcc_close(void)
 689 {
 690     BufferedFile *bf = file;
 691     if (bf->fd > 0) {
 692         close(bf->fd);
 693         total_lines += bf->line_num;
 694     }
 695     file = bf->prev;
 696     tcc_free(bf);
 697 }
 698
 699 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 700 {
 701     int fd;
 702     if (strcmp(filename, "-") == 0)
 703         fd = 0, filename = "stdin";
 704     else
 705         fd = open(filename, O_RDONLY | O_BINARY);
 706     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 707         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 708                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 709     if (fd < 0)
 710         return -1;
 711
 712     tcc_open_bf(s1, filename, 0);
 713     file->fd = fd;
 714     return fd;
 715 }
 716
 717 /* compile the C file opened in 'file'. Return non zero if errors. */
 718 static int tcc_compile(TCCState *s1)
 719 {
 720     Sym *define_start;
 721     SValue *pvtop;
 722     char buf[512];
 723     volatile int section_sym;
 724
 725 #ifdef INC_DEBUG
 726     printf("%s: **** new file\n", file->filename);
 727 #endif
 728     preprocess_init(s1);
 729
 730     cur_text_section = NULL;
 731     funcname = "";
 732     anon_sym = SYM_FIRST_ANOM;
 733
 734     /* file info: full path + filename */
 735     section_sym = 0; /* avoid warning */
 736     if (s1->do_debug) {
 737         section_sym = put_elf_sym(symtab_section, 0, 0,
 738                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 739                                   text_section->sh_num, NULL);
 740         getcwd(buf, sizeof(buf));
 741 #ifdef _WIN32
 742         normalize_slashes(buf);
 743 #endif
 744         pstrcat(buf, sizeof(buf), "/");
 745         put_stabs_r(buf, N_SO, 0, 0,
 746                     text_section->data_offset, text_section, section_sym);
 747         put_stabs_r(file->filename, N_SO, 0, 0,
 748                     text_section->data_offset, text_section, section_sym);
 749     }
 750     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 751        symbols can be safely used */
 752     put_elf_sym(symtab_section, 0, 0,
 753                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 754                 SHN_ABS, file->filename);
 755
 756     /* define some often used types */
 757     int_type.t = VT_INT;
 758
 759     char_pointer_type.t = VT_BYTE;
 760     mk_pointer(&char_pointer_type);
 761
 762 #if PTR_SIZE == 4
 763     size_type.t = VT_INT;
 764 #else
 765     size_type.t = VT_LLONG;
 766 #endif
 767
 768     func_old_type.t = VT_FUNC;
 769     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 770 #ifdef TCC_TARGET_ARM
 771     arm_init(s1);
 772 #endif
 773
 774 #if 0
 775     /* define 'void *alloca(unsigned int)' builtin function */
 776     {
 777         Sym *s1;
 778
 779         p = anon_sym++;
 780         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 781         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 782         s1->next = NULL;
 783         sym->next = s1;
 784         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 785     }
 786 #endif
 787
 788     define_start = define_stack;
 789
 790     if (setjmp(s1->error_jmp_buf) == 0) {
 791         s1->nb_errors = 0;
 792         s1->error_set_jmp_enabled = 1;
 793
 794         ch = file->buf_ptr[0];
 795         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 796         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 797         pvtop = vtop;
 798         next();
 799         decl(VT_CONST);
 800         if (tok != TOK_EOF)
 801             expect("declaration");
 802         if (pvtop != vtop)
 803             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 804
 805         /* end of translation unit info */
 806         if (s1->do_debug) {
 807             put_stabs_r(NULL, N_SO, 0, 0,
 808                         text_section->data_offset, text_section, section_sym);
 809         }
 810     }
 811
 812     s1->error_set_jmp_enabled = 0;
 813
 814     /* reset define stack, but leave -Dsymbols (may be incorrect if
 815        they are undefined) */
 816     free_defines(define_start);
 817
 818     gen_inline_functions();
 819
 820     sym_pop(&global_stack, NULL);
 821     sym_pop(&local_stack, NULL);
 822
 823     return s1->nb_errors != 0 ? -1 : 0;
 824 }
 825
 826 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 827 {
 828     int len, ret;
 829     len = strlen(str);
 830
 831     tcc_open_bf(s, "<string>", len);
 832     memcpy(file->buffer, str, len);
 833     ret = tcc_compile(s);
 834     tcc_close();
 835     return ret;
 836 }
 837
 838 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 839 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 840 {
 841     int len1, len2;
 842     /* default value */
 843     if (!value)
 844         value = "1";
 845     len1 = strlen(sym);
 846     len2 = strlen(value);
 847
 848     /* init file structure */
 849     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 850     memcpy(file->buffer, sym, len1);
 851     file->buffer[len1] = ' ';
 852     memcpy(file->buffer + len1 + 1, value, len2);
 853
 854     /* parse with define parser */
 855     ch = file->buf_ptr[0];
 856     next_nomacro();
 857     parse_define();
 858
 859     tcc_close();
 860 }
 861
 862 /* undefine a preprocessor symbol */
 863 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 864 {
 865     TokenSym *ts;
 866     Sym *s;
 867     ts = tok_alloc(sym, strlen(sym));
 868     s = define_find(ts->tok);
 869     /* undefine symbol by putting an invalid name */
 870     if (s)
 871         define_undef(s);
 872 }
 873
 874 /* cleanup all static data used during compilation */
 875 static void tcc_cleanup(void)
 876 {
 877     int i, n;
 878     if (NULL == tcc_state)
 879         return;
 880     tcc_state = NULL;
 881
 882     /* free -D defines */
 883     free_defines(NULL);
 884
 885     /* free tokens */
 886     n = tok_ident - TOK_IDENT;
 887     for(i = 0; i < n; i++)
 888         tcc_free(table_ident[i]);
 889     tcc_free(table_ident);
 890
 891     /* free sym_pools */
 892     dynarray_reset(&sym_pools, &nb_sym_pools);
 893     /* string buffer */
 894     cstr_free(&tokcstr);
 895     /* reset symbol stack */
 896     sym_free_first = NULL;
 897     /* cleanup from error/setjmp */
 898     macro_ptr = NULL;
 899 }
 900
 901 LIBTCCAPI TCCState *tcc_new(void)
 902 {
 903     TCCState *s;
 904     char buffer[100];
 905     int a,b,c;
 906
 907     tcc_cleanup();
 908
 909     s = tcc_mallocz(sizeof(TCCState));
 910     if (!s)
 911         return NULL;
 912     tcc_state = s;
 913 #ifdef _WIN32
 914     tcc_set_lib_path_w32(s);
 915 #else
 916     tcc_set_lib_path(s, CONFIG_TCCDIR);
 917 #endif
 918     s->output_type = 0;
 919     preprocess_new();
 920     s->include_stack_ptr = s->include_stack;
 921
 922     /* we add dummy defines for some special macros to speed up tests
 923        and to have working defined() */
 924     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 925     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 926     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 927     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 928
 929     /* define __TINYC__ 92X  */
 930     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 931     sprintf(buffer, "%d", a*10000 + b*100 + c);
 932     tcc_define_symbol(s, "__TINYC__", buffer);
 933
 934     /* standard defines */
 935     tcc_define_symbol(s, "__STDC__", NULL);
 936     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 937     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 938
 939     /* target defines */
 940 #if defined(TCC_TARGET_I386)
 941     tcc_define_symbol(s, "__i386__", NULL);
 942     tcc_define_symbol(s, "__i386", NULL);
 943     tcc_define_symbol(s, "i386", NULL);
 944 #elif defined(TCC_TARGET_X86_64)
 945     tcc_define_symbol(s, "__x86_64__", NULL);
 946 #elif defined(TCC_TARGET_ARM)
 947     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 948     tcc_define_symbol(s, "__arm_elf__", NULL);
 949     tcc_define_symbol(s, "__arm_elf", NULL);
 950     tcc_define_symbol(s, "arm_elf", NULL);
 951     tcc_define_symbol(s, "__arm__", NULL);
 952     tcc_define_symbol(s, "__arm", NULL);
 953     tcc_define_symbol(s, "arm", NULL);
 954     tcc_define_symbol(s, "__APCS_32__", NULL);
 955     tcc_define_symbol(s, "__ARMEL__", NULL);
 956 #if defined(TCC_ARM_EABI)
 957     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 958 #endif
 959 #if defined(TCC_ARM_HARDFLOAT)
 960     s->float_abi = ARM_HARD_FLOAT;
 961     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 962 #else
 963     s->float_abi = ARM_SOFTFP_FLOAT;
 964 #endif
 965 #elif defined(TCC_TARGET_ARM64)
 966     tcc_define_symbol(s, "__aarch64__", NULL);
 967 #endif
 968
 969 #ifdef TCC_TARGET_PE
 970     tcc_define_symbol(s, "_WIN32", NULL);
 971 # ifdef TCC_TARGET_X86_64
 972     tcc_define_symbol(s, "_WIN64", NULL);
 973 # endif
 974 #else
 975     tcc_define_symbol(s, "__unix__", NULL);
 976     tcc_define_symbol(s, "__unix", NULL);
 977     tcc_define_symbol(s, "unix", NULL);
 978 # if defined(__linux)
 979     tcc_define_symbol(s, "__linux__", NULL);
 980     tcc_define_symbol(s, "__linux", NULL);
 981 # endif
 982 # if defined(__FreeBSD__)
 983 #  define str(s) #s
 984     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 985 #  undef str
 986 # endif
 987 # if defined(__FreeBSD_kernel__)
 988     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 989 # endif
 990 #endif
 991
 992     /* TinyCC & gcc defines */
 993 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 994     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 995     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 996 #else
 997     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 998     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 999 #endif
1000
1001 #ifdef TCC_TARGET_PE
1002     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1003     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1004 #else
1005     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1006     /* wint_t is unsigned int by default, but (signed) int on BSDs
1007        and unsigned short on windows.  Other OSes might have still
1008        other conventions, sigh.  */
1009 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
1010     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1011 #else
1012     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1013 #endif
1014 #endif
1015
1016 #ifndef TCC_TARGET_PE
1017     /* glibc defines */
1018     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1019     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1020     /* paths for crt objects */
1021     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1022 #endif
1023
1024     /* no section zero */
1025     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1026
1027     /* create standard sections */
1028     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1029     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1030     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1031
1032     /* symbols are always generated for linking stage */
1033     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1034                                 ".strtab",
1035                                 ".hashtab", SHF_PRIVATE);
1036     strtab_section = symtab_section->link;
1037     s->symtab = symtab_section;
1038
1039     /* private symbol table for dynamic symbols */
1040     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1041                                       ".dynstrtab",
1042                                       ".dynhashtab", SHF_PRIVATE);
1043     s->alacarte_link = 1;
1044     s->nocommon = 1;
1045
1046 #ifdef CHAR_IS_UNSIGNED
1047     s->char_is_unsigned = 1;
1048 #endif
1049     /* enable this if you want symbols with leading underscore on windows: */
1050 #if 0 /* def TCC_TARGET_PE */
1051     s->leading_underscore = 1;
1052 #endif
1053 #ifdef TCC_TARGET_I386
1054     s->seg_size = 32;
1055 #endif
1056 #ifdef TCC_IS_NATIVE
1057     s->runtime_main = "main";
1058 #endif
1059     return s;
1060 }
1061
1062 LIBTCCAPI void tcc_delete(TCCState *s1)
1063 {
1064     int i;
1065
1066     tcc_cleanup();
1067
1068     /* free all sections */
1069     for(i = 1; i < s1->nb_sections; i++)
1070         free_section(s1->sections[i]);
1071     dynarray_reset(&s1->sections, &s1->nb_sections);
1072
1073     for(i = 0; i < s1->nb_priv_sections; i++)
1074         free_section(s1->priv_sections[i]);
1075     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1076
1077     /* free any loaded DLLs */
1078 #ifdef TCC_IS_NATIVE
1079     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1080         DLLReference *ref = s1->loaded_dlls[i];
1081         if ( ref->handle )
1082             dlclose(ref->handle);
1083     }
1084 #endif
1085
1086     /* free loaded dlls array */
1087     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1088
1089     /* free library paths */
1090     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1091     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1092
1093     /* free include paths */
1094     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1095     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1096     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1097
1098     tcc_free(s1->tcc_lib_path);
1099     tcc_free(s1->soname);
1100     tcc_free(s1->rpath);
1101     tcc_free(s1->init_symbol);
1102     tcc_free(s1->fini_symbol);
1103     tcc_free(s1->outfile);
1104     tcc_free(s1->deps_outfile);
1105     dynarray_reset(&s1->files, &s1->nb_files);
1106     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1107
1108 #ifdef TCC_IS_NATIVE
1109 # ifdef HAVE_SELINUX
1110     munmap (s1->write_mem, s1->mem_size);
1111     munmap (s1->runtime_mem, s1->mem_size);
1112 # else
1113     tcc_free(s1->runtime_mem);
1114 # endif
1115 #endif
1116
1117     if(s1->sym_attrs) tcc_free(s1->sym_attrs);
1118
1119     tcc_free(s1);
1120 }
1121
1122 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1123 {
1124     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1125     return 0;
1126 }
1127
1128 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1129 {
1130     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1131     return 0;
1132 }
1133
1134 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1135 {
1136     const char *ext;
1137     ElfW(Ehdr) ehdr;
1138     int fd, ret, size;
1139
1140     /* find source file type with extension */
1141     ext = tcc_fileextension(filename);
1142     if (ext[0])
1143         ext++;
1144
1145 #ifdef CONFIG_TCC_ASM
1146     /* if .S file, define __ASSEMBLER__ like gcc does */
1147     if (!strcmp(ext, "S"))
1148         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1149 #endif
1150
1151     /* open the file */
1152     ret = tcc_open(s1, filename);
1153     if (ret < 0) {
1154         if (flags & AFF_PRINT_ERROR)
1155             tcc_error_noabort("file '%s' not found", filename);
1156         return ret;
1157     }
1158
1159     /* update target deps */
1160     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1161             tcc_strdup(filename));
1162
1163     if (flags & AFF_PREPROCESS) {
1164         ret = tcc_preprocess(s1);
1165         goto the_end;
1166     }
1167
1168     if (!ext[0] || !PATHCMP(ext, "c") || !PATHCMP(ext, "i")) {
1169         /* C file assumed */
1170         ret = tcc_compile(s1);
1171         goto the_end;
1172     }
1173
1174 #ifdef CONFIG_TCC_ASM
1175     if (!strcmp(ext, "S")) {
1176         /* preprocessed assembler */
1177         ret = tcc_assemble(s1, 1);
1178         goto the_end;
1179     }
1180
1181     if (!strcmp(ext, "s")) {
1182         /* non preprocessed assembler */
1183         ret = tcc_assemble(s1, 0);
1184         goto the_end;
1185     }
1186 #endif
1187
1188     fd = file->fd;
1189     /* assume executable format: auto guess file type */
1190     size = read(fd, &ehdr, sizeof(ehdr));
1191     lseek(fd, 0, SEEK_SET);
1192     if (size <= 0) {
1193         tcc_error_noabort("could not read header");
1194         goto the_end;
1195     }
1196
1197     if (size == sizeof(ehdr) &&
1198         ehdr.e_ident[0] == ELFMAG0 &&
1199         ehdr.e_ident[1] == ELFMAG1 &&
1200         ehdr.e_ident[2] == ELFMAG2 &&
1201         ehdr.e_ident[3] == ELFMAG3) {
1202
1203         /* do not display line number if error */
1204         file->line_num = 0;
1205         if (ehdr.e_type == ET_REL) {
1206             ret = tcc_load_object_file(s1, fd, 0);
1207             goto the_end;
1208
1209         }
1210 #ifndef TCC_TARGET_PE
1211         if (ehdr.e_type == ET_DYN) {
1212             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1213 #ifdef TCC_IS_NATIVE
1214                 void *h;
1215                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1216                 if (h)
1217 #endif
1218                     ret = 0;
1219             } else {
1220                 ret = tcc_load_dll(s1, fd, filename,
1221                                    (flags & AFF_REFERENCED_DLL) != 0);
1222             }
1223             goto the_end;
1224         }
1225 #endif
1226         tcc_error_noabort("unrecognized ELF file");
1227         goto the_end;
1228     }
1229
1230     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1231         file->line_num = 0; /* do not display line number if error */
1232         ret = tcc_load_archive(s1, fd);
1233         goto the_end;
1234     }
1235
1236 #ifdef TCC_TARGET_COFF
1237     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1238         ret = tcc_load_coff(s1, fd);
1239         goto the_end;
1240     }
1241 #endif
1242
1243 #ifdef TCC_TARGET_PE
1244     ret = pe_load_file(s1, filename, fd);
1245 #else
1246     /* as GNU ld, consider it is an ld script if not recognized */
1247     ret = tcc_load_ldscript(s1);
1248 #endif
1249     if (ret < 0)
1250         tcc_error_noabort("unrecognized file type");
1251
1252 the_end:
1253     tcc_close();
1254     return ret;
1255 }
1256
1257 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1258 {
1259     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1260         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1261     else
1262         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1263 }
1264
1265 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1266 {
1267     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1268     return 0;
1269 }
1270
1271 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1272     const char *filename, int flags, char **paths, int nb_paths)
1273 {
1274     char buf[1024];
1275     int i;
1276
1277     for(i = 0; i < nb_paths; i++) {
1278         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1279         if (tcc_add_file_internal(s, buf, flags) == 0)
1280             return 0;
1281     }
1282     return -1;
1283 }
1284
1285 /* find and load a dll. Return non zero if not found */
1286 /* XXX: add '-rpath' option support ? */
1287 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1288 {
1289     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1290         s->library_paths, s->nb_library_paths);
1291 }
1292
1293 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1294 {
1295     if (-1 == tcc_add_library_internal(s, "%s/%s",
1296         filename, 0, s->crt_paths, s->nb_crt_paths))
1297         tcc_error_noabort("file '%s' not found", filename);
1298     return 0;
1299 }
1300
1301 /* the library name is the same as the argument of the '-l' option */
1302 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1303 {
1304 #ifdef TCC_TARGET_PE
1305     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1306     const char **pp = s->static_link ? libs + 4 : libs;
1307 #else
1308     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1309     const char **pp = s->static_link ? libs + 1 : libs;
1310 #endif
1311     while (*pp) {
1312         if (0 == tcc_add_library_internal(s, *pp,
1313             libraryname, 0, s->library_paths, s->nb_library_paths))
1314             return 0;
1315         ++pp;
1316     }
1317     return -1;
1318 }
1319
1320 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1321 {
1322 #ifdef TCC_TARGET_PE
1323     /* On x86_64 'val' might not be reachable with a 32bit offset.
1324        So it is handled here as if it were in a DLL. */
1325     pe_putimport(s, 0, name, (uintptr_t)val);
1326 #else
1327     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1328         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1329         SHN_ABS, name);
1330 #endif
1331     return 0;
1332 }
1333
1334 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1335 {
1336     s->output_type = output_type;
1337
1338     if (!s->nostdinc) {
1339         /* default include paths */
1340         /* -isystem paths have already been handled */
1341         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1342     }
1343
1344     /* if bound checking, then add corresponding sections */
1345 #ifdef CONFIG_TCC_BCHECK
1346     if (s->do_bounds_check) {
1347         /* define symbol */
1348         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1349         /* create bounds sections */
1350         bounds_section = new_section(s, ".bounds",
1351                                      SHT_PROGBITS, SHF_ALLOC);
1352         lbounds_section = new_section(s, ".lbounds",
1353                                       SHT_PROGBITS, SHF_ALLOC);
1354     }
1355 #endif
1356
1357     if (s->char_is_unsigned) {
1358         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1359     }
1360
1361     /* add debug sections */
1362     if (s->do_debug) {
1363         /* stab symbols */
1364         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1365         stab_section->sh_entsize = sizeof(Stab_Sym);
1366         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1367         put_elf_str(stabstr_section, "");
1368         stab_section->link = stabstr_section;
1369         /* put first entry */
1370         put_stabs("", 0, 0, 0, 0);
1371     }
1372
1373     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1374 #ifdef TCC_TARGET_PE
1375 # ifdef _WIN32
1376     tcc_add_systemdir(s);
1377 # endif
1378 #else
1379     /* add libc crt1/crti objects */
1380     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1381         !s->nostdlib) {
1382         if (output_type != TCC_OUTPUT_DLL)
1383             tcc_add_crt(s, "crt1.o");
1384         tcc_add_crt(s, "crti.o");
1385     }
1386 #endif
1387     return 0;
1388 }
1389
1390 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1391 {
1392     tcc_free(s->tcc_lib_path);
1393     s->tcc_lib_path = tcc_strdup(path);
1394 }
1395
1396 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1397 #define FD_INVERT 0x0002 /* invert value before storing */
1398
1399 typedef struct FlagDef {
1400     uint16_t offset;
1401     uint16_t flags;
1402     const char *name;
1403 } FlagDef;
1404
1405 static const FlagDef warning_defs[] = {
1406     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1407     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1408     { offsetof(TCCState, warn_error), 0, "error" },
1409     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1410       "implicit-function-declaration" },
1411 };
1412
1413 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1414                     const char *name, int value)
1415 {
1416     int i;
1417     const FlagDef *p;
1418     const char *r;
1419
1420     r = name;
1421     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1422         r += 3;
1423         value = !value;
1424     }
1425     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1426         if (!strcmp(r, p->name))
1427             goto found;
1428     }
1429     return -1;
1430  found:
1431     if (p->flags & FD_INVERT)
1432         value = !value;
1433     *(int *)((uint8_t *)s + p->offset) = value;
1434     return 0;
1435 }
1436
1437 /* set/reset a warning */
1438 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1439 {
1440     int i;
1441     const FlagDef *p;
1442
1443     if (!strcmp(warning_name, "all")) {
1444         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1445             if (p->flags & WD_ALL)
1446                 *(int *)((uint8_t *)s + p->offset) = 1;
1447         }
1448         return 0;
1449     } else {
1450         return set_flag(s, warning_defs, countof(warning_defs),
1451                         warning_name, value);
1452     }
1453 }
1454
1455 static const FlagDef flag_defs[] = {
1456     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1457     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1458     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1459     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1460 };
1461
1462 /* set/reset a flag */
1463 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1464 {
1465     return set_flag(s, flag_defs, countof(flag_defs),
1466                     flag_name, value);
1467 }
1468
1469
1470 static int strstart(const char *val, const char **str)
1471 {
1472     const char *p, *q;
1473     p = *str;
1474     q = val;
1475     while (*q) {
1476         if (*p != *q)
1477             return 0;
1478         p++;
1479         q++;
1480     }
1481     *str = p;
1482     return 1;
1483 }
1484
1485 /* Like strstart, but automatically takes into account that ld options can
1486  *
1487  * - start with double or single dash (e.g. '--soname' or '-soname')
1488  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1489  *   or '-Wl,-soname=x.so')
1490  *
1491  * you provide `val` always in 'option[=]' form (no leading -)
1492  */
1493 static int link_option(const char *str, const char *val, const char **ptr)
1494 {
1495     const char *p, *q;
1496
1497     /* there should be 1 or 2 dashes */
1498     if (*str++ != '-')
1499         return 0;
1500     if (*str == '-')
1501         str++;
1502
1503     /* then str & val should match (potentialy up to '=') */
1504     p = str;
1505     q = val;
1506
1507     while (*q != '\0' && *q != '=') {
1508         if (*p != *q)
1509             return 0;
1510         p++;
1511         q++;
1512     }
1513
1514     /* '=' near eos means ',' or '=' is ok */
1515     if (*q == '=') {
1516         if (*p != ',' && *p != '=')
1517             return 0;
1518         p++;
1519         q++;
1520     }
1521
1522     if (ptr)
1523         *ptr = p;
1524     return 1;
1525 }
1526
1527 static const char *skip_linker_arg(const char **str)
1528 {
1529     const char *s1 = *str;
1530     const char *s2 = strchr(s1, ',');
1531     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1532     return s2;
1533 }
1534
1535 static char *copy_linker_arg(const char *p)
1536 {
1537     const char *q = p;
1538     skip_linker_arg(&q);
1539     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1540 }
1541
1542 /* set linker options */
1543 static int tcc_set_linker(TCCState *s, const char *option)
1544 {
1545     while (option && *option) {
1546
1547         const char *p = option;
1548         char *end = NULL;
1549         int ignoring = 0;
1550
1551         if (link_option(option, "Bsymbolic", &p)) {
1552             s->symbolic = 1;
1553         } else if (link_option(option, "nostdlib", &p)) {
1554             s->nostdlib = 1;
1555         } else if (link_option(option, "fini=", &p)) {
1556             s->fini_symbol = copy_linker_arg(p);
1557             ignoring = 1;
1558         } else if (link_option(option, "image-base=", &p)
1559                 || link_option(option, "Ttext=", &p)) {
1560             s->text_addr = strtoull(p, &end, 16);
1561             s->has_text_addr = 1;
1562         } else if (link_option(option, "init=", &p)) {
1563             s->init_symbol = copy_linker_arg(p);
1564             ignoring = 1;
1565         } else if (link_option(option, "oformat=", &p)) {
1566 #if defined(TCC_TARGET_PE)
1567             if (strstart("pe-", &p)) {
1568 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1569             if (strstart("elf64-", &p)) {
1570 #else
1571             if (strstart("elf32-", &p)) {
1572 #endif
1573                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1574             } else if (!strcmp(p, "binary")) {
1575                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1576 #ifdef TCC_TARGET_COFF
1577             } else if (!strcmp(p, "coff")) {
1578                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1579 #endif
1580             } else
1581                 goto err;
1582
1583         } else if (link_option(option, "as-needed", &p)) {
1584             ignoring = 1;
1585         } else if (link_option(option, "O", &p)) {
1586             ignoring = 1;
1587         } else if (link_option(option, "rpath=", &p)) {
1588             s->rpath = copy_linker_arg(p);
1589         } else if (link_option(option, "section-alignment=", &p)) {
1590             s->section_align = strtoul(p, &end, 16);
1591         } else if (link_option(option, "soname=", &p)) {
1592             s->soname = copy_linker_arg(p);
1593 #ifdef TCC_TARGET_PE
1594         } else if (link_option(option, "file-alignment=", &p)) {
1595             s->pe_file_align = strtoul(p, &end, 16);
1596         } else if (link_option(option, "stack=", &p)) {
1597             s->pe_stack_size = strtoul(p, &end, 10);
1598         } else if (link_option(option, "subsystem=", &p)) {
1599 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1600             if (!strcmp(p, "native")) {
1601                 s->pe_subsystem = 1;
1602             } else if (!strcmp(p, "console")) {
1603                 s->pe_subsystem = 3;
1604             } else if (!strcmp(p, "gui")) {
1605                 s->pe_subsystem = 2;
1606             } else if (!strcmp(p, "posix")) {
1607                 s->pe_subsystem = 7;
1608             } else if (!strcmp(p, "efiapp")) {
1609                 s->pe_subsystem = 10;
1610             } else if (!strcmp(p, "efiboot")) {
1611                 s->pe_subsystem = 11;
1612             } else if (!strcmp(p, "efiruntime")) {
1613                 s->pe_subsystem = 12;
1614             } else if (!strcmp(p, "efirom")) {
1615                 s->pe_subsystem = 13;
1616 #elif defined(TCC_TARGET_ARM)
1617             if (!strcmp(p, "wince")) {
1618                 s->pe_subsystem = 9;
1619 #endif
1620             } else
1621                 goto err;
1622 #endif
1623         } else
1624             goto err;
1625
1626         if (ignoring && s->warn_unsupported) err: {
1627             char buf[100], *e;
1628             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1629             if (ignoring)
1630                 tcc_warning("unsupported linker option '%s'", buf);
1631             else
1632                 tcc_error("unsupported linker option '%s'", buf);
1633         }
1634         option = skip_linker_arg(&p);
1635     }
1636     return 0;
1637 }
1638
1639 typedef struct TCCOption {
1640     const char *name;
1641     uint16_t index;
1642     uint16_t flags;
1643 } TCCOption;
1644
1645 enum {
1646     TCC_OPTION_HELP,
1647     TCC_OPTION_I,
1648     TCC_OPTION_D,
1649     TCC_OPTION_U,
1650     TCC_OPTION_P,
1651     TCC_OPTION_L,
1652     TCC_OPTION_B,
1653     TCC_OPTION_l,
1654     TCC_OPTION_bench,
1655     TCC_OPTION_bt,
1656     TCC_OPTION_b,
1657     TCC_OPTION_g,
1658     TCC_OPTION_c,
1659     TCC_OPTION_float_abi,
1660     TCC_OPTION_static,
1661     TCC_OPTION_shared,
1662     TCC_OPTION_soname,
1663     TCC_OPTION_o,
1664     TCC_OPTION_r,
1665     TCC_OPTION_s,
1666     TCC_OPTION_Wl,
1667     TCC_OPTION_W,
1668     TCC_OPTION_O,
1669     TCC_OPTION_m,
1670     TCC_OPTION_f,
1671     TCC_OPTION_isystem,
1672     TCC_OPTION_nostdinc,
1673     TCC_OPTION_nostdlib,
1674     TCC_OPTION_print_search_dirs,
1675     TCC_OPTION_rdynamic,
1676     TCC_OPTION_pedantic,
1677     TCC_OPTION_pthread,
1678     TCC_OPTION_run,
1679     TCC_OPTION_v,
1680     TCC_OPTION_w,
1681     TCC_OPTION_pipe,
1682     TCC_OPTION_E,
1683     TCC_OPTION_MD,
1684     TCC_OPTION_MF,
1685     TCC_OPTION_x,
1686     TCC_OPTION_dumpversion,
1687 };
1688
1689 #define TCC_OPTION_HAS_ARG 0x0001
1690 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1691
1692 static const TCCOption tcc_options[] = {
1693     { "h", TCC_OPTION_HELP, 0 },
1694     { "-help", TCC_OPTION_HELP, 0 },
1695     { "?", TCC_OPTION_HELP, 0 },
1696     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1697     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1698     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1699     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1700     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1701     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1702     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1703     { "bench", TCC_OPTION_bench, 0 },
1704 #ifdef CONFIG_TCC_BACKTRACE
1705     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1706 #endif
1707 #ifdef CONFIG_TCC_BCHECK
1708     { "b", TCC_OPTION_b, 0 },
1709 #endif
1710     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1711     { "c", TCC_OPTION_c, 0 },
1712 #ifdef TCC_TARGET_ARM
1713     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1714 #endif
1715     { "static", TCC_OPTION_static, 0 },
1716     { "shared", TCC_OPTION_shared, 0 },
1717     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1718     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1719     { "pedantic", TCC_OPTION_pedantic, 0},
1720     { "pthread", TCC_OPTION_pthread, 0},
1721     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1722     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1723     { "r", TCC_OPTION_r, 0 },
1724     { "s", TCC_OPTION_s, 0 },
1725     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1726     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1727     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1728     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1729     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1730     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1731     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1732     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1733     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1734     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1735     { "w", TCC_OPTION_w, 0 },
1736     { "pipe", TCC_OPTION_pipe, 0},
1737     { "E", TCC_OPTION_E, 0},
1738     { "MD", TCC_OPTION_MD, 0},
1739     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1740     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1741     { "dumpversion", TCC_OPTION_dumpversion, 0},
1742     { NULL, 0, 0 },
1743 };
1744
1745 static void parse_option_D(TCCState *s1, const char *optarg)
1746 {
1747     char *sym = tcc_strdup(optarg);
1748     char *value = strchr(sym, '=');
1749     if (value)
1750         *value++ = '\0';
1751     tcc_define_symbol(s1, sym, value);
1752     tcc_free(sym);
1753 }
1754
1755 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1756 {
1757     const TCCOption *popt;
1758     const char *optarg, *r;
1759     int run = 0;
1760     int pthread = 0;
1761     int optind = 0;
1762
1763     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1764     CString linker_arg;
1765     cstr_new(&linker_arg);
1766
1767     while (optind < argc) {
1768
1769         r = argv[optind++];
1770         if (r[0] != '-' || r[1] == '\0') {
1771             /* add a new file */
1772             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1773             if (run) {
1774                 optind--;
1775                 /* argv[0] will be this file */
1776                 break;
1777             }
1778             continue;
1779         }
1780
1781         /* find option in table */
1782         for(popt = tcc_options; ; ++popt) {
1783             const char *p1 = popt->name;
1784             const char *r1 = r + 1;
1785             if (p1 == NULL)
1786                 tcc_error("invalid option -- '%s'", r);
1787             if (!strstart(p1, &r1))
1788                 continue;
1789             optarg = r1;
1790             if (popt->flags & TCC_OPTION_HAS_ARG) {
1791                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1792                     if (optind >= argc)
1793                         tcc_error("argument to '%s' is missing", r);
1794                     optarg = argv[optind++];
1795                 }
1796             } else if (*r1 != '\0')
1797                 continue;
1798             break;
1799         }
1800
1801         switch(popt->index) {
1802         case TCC_OPTION_HELP:
1803             return 0;
1804         case TCC_OPTION_I:
1805             if (tcc_add_include_path(s, optarg) < 0)
1806                 tcc_error("too many include paths");
1807             break;
1808         case TCC_OPTION_D:
1809             parse_option_D(s, optarg);
1810             break;
1811         case TCC_OPTION_U:
1812             tcc_undefine_symbol(s, optarg);
1813             break;
1814         case TCC_OPTION_L:
1815             tcc_add_library_path(s, optarg);
1816             break;
1817         case TCC_OPTION_B:
1818             /* set tcc utilities path (mainly for tcc development) */
1819             tcc_set_lib_path(s, optarg);
1820             break;
1821         case TCC_OPTION_l:
1822             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1823             s->nb_libraries++;
1824             break;
1825         case TCC_OPTION_pthread:
1826             parse_option_D(s, "_REENTRANT");
1827             pthread = 1;
1828             break;
1829         case TCC_OPTION_bench:
1830             s->do_bench = 1;
1831             break;
1832 #ifdef CONFIG_TCC_BACKTRACE
1833         case TCC_OPTION_bt:
1834             tcc_set_num_callers(atoi(optarg));
1835             break;
1836 #endif
1837 #ifdef CONFIG_TCC_BCHECK
1838         case TCC_OPTION_b:
1839             s->do_bounds_check = 1;
1840             s->do_debug = 1;
1841             break;
1842 #endif
1843         case TCC_OPTION_g:
1844             s->do_debug = 1;
1845             break;
1846         case TCC_OPTION_c:
1847             if (s->output_type)
1848                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
1849             s->output_type = TCC_OUTPUT_OBJ;
1850             break;
1851 #ifdef TCC_TARGET_ARM
1852         case TCC_OPTION_float_abi:
1853             /* tcc doesn't support soft float yet */
1854             if (!strcmp(optarg, "softfp")) {
1855                 s->float_abi = ARM_SOFTFP_FLOAT;
1856                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1857             } else if (!strcmp(optarg, "hard"))
1858                 s->float_abi = ARM_HARD_FLOAT;
1859             else
1860                 tcc_error("unsupported float abi '%s'", optarg);
1861             break;
1862 #endif
1863         case TCC_OPTION_static:
1864             s->static_link = 1;
1865             break;
1866         case TCC_OPTION_shared:
1867             if (s->output_type)
1868                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
1869             s->output_type = TCC_OUTPUT_DLL;
1870             break;
1871         case TCC_OPTION_soname:
1872             s->soname = tcc_strdup(optarg);
1873             break;
1874         case TCC_OPTION_m:
1875             s->option_m = tcc_strdup(optarg);
1876             break;
1877         case TCC_OPTION_o:
1878             s->outfile = tcc_strdup(optarg);
1879             break;
1880         case TCC_OPTION_r:
1881             /* generate a .o merging several output files */
1882             if (s->output_type)
1883                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
1884             s->option_r = 1;
1885             s->output_type = TCC_OUTPUT_OBJ;
1886             break;
1887         case TCC_OPTION_isystem:
1888             tcc_add_sysinclude_path(s, optarg);
1889             break;
1890         case TCC_OPTION_nostdinc:
1891             s->nostdinc = 1;
1892             break;
1893         case TCC_OPTION_nostdlib:
1894             s->nostdlib = 1;
1895             break;
1896         case TCC_OPTION_print_search_dirs:
1897             s->print_search_dirs = 1;
1898             break;
1899         case TCC_OPTION_run:
1900             if (s->output_type)
1901                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
1902             s->output_type = TCC_OUTPUT_MEMORY;
1903             tcc_set_options(s, optarg);
1904             run = 1;
1905             break;
1906         case TCC_OPTION_v:
1907             do ++s->verbose; while (*optarg++ == 'v');
1908             break;
1909         case TCC_OPTION_f:
1910             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1911                 goto unsupported_option;
1912             break;
1913         case TCC_OPTION_W:
1914             if (tcc_set_warning(s, optarg, 1) < 0 &&
1915                 s->warn_unsupported)
1916                 goto unsupported_option;
1917             break;
1918         case TCC_OPTION_w:
1919             s->warn_none = 1;
1920             break;
1921         case TCC_OPTION_rdynamic:
1922             s->rdynamic = 1;
1923             break;
1924         case TCC_OPTION_Wl:
1925             if (linker_arg.size)
1926                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1927             cstr_cat(&linker_arg, optarg);
1928             cstr_ccat(&linker_arg, '\0');
1929             break;
1930         case TCC_OPTION_E:
1931             if (s->output_type)
1932                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
1933             s->output_type = TCC_OUTPUT_PREPROCESS;
1934             break;
1935         case TCC_OPTION_P:
1936             s->Pflag = atoi(optarg) + 1;
1937             break;
1938         case TCC_OPTION_MD:
1939             s->gen_deps = 1;
1940             break;
1941         case TCC_OPTION_MF:
1942             s->deps_outfile = tcc_strdup(optarg);
1943             break;
1944         case TCC_OPTION_dumpversion:
1945             printf ("%s\n", TCC_VERSION);
1946             exit(0);
1947         case TCC_OPTION_O:
1948         case TCC_OPTION_pedantic:
1949         case TCC_OPTION_pipe:
1950         case TCC_OPTION_s:
1951         case TCC_OPTION_x:
1952             /* ignored */
1953             break;
1954         default:
1955             if (s->warn_unsupported) {
1956             unsupported_option:
1957                 tcc_warning("unsupported option '%s'", r);
1958             }
1959             break;
1960         }
1961     }
1962
1963     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
1964         tcc_set_options(s, "-lpthread");
1965
1966     tcc_set_linker(s, (const char *)linker_arg.data);
1967     cstr_free(&linker_arg);
1968
1969     return optind;
1970 }
1971
1972 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
1973 {
1974     const char *s1;
1975     char **argv, *arg;
1976     int argc, len;
1977     int ret;
1978
1979     argc = 0, argv = NULL;
1980     for(;;) {
1981         while (is_space(*str))
1982             str++;
1983         if (*str == '\0')
1984             break;
1985         s1 = str;
1986         while (*str != '\0' && !is_space(*str))
1987             str++;
1988         len = str - s1;
1989         arg = tcc_malloc(len + 1);
1990         pstrncpy(arg, s1, len);
1991         dynarray_add((void ***)&argv, &argc, arg);
1992     }
1993     ret = tcc_parse_args(s, argc, argv);
1994     dynarray_reset(&argv, &argc);
1995     return ret;
1996 }
1997
1998 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1999 {
2000     double tt;
2001     tt = (double)total_time / 1000000.0;
2002     if (tt < 0.001)
2003         tt = 0.001;
2004     if (total_bytes < 1)
2005         total_bytes = 1;
2006     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2007            tok_ident - TOK_IDENT, total_lines, total_bytes,
2008            tt, (int)(total_lines / tt),
2009            total_bytes / tt / 1000000.0);
2010 }
2011
2012 PUB_FUNC void tcc_set_environment(TCCState *s)
2013 {
2014     char * path;
2015
2016     path = getenv("C_INCLUDE_PATH");
2017     if(path != NULL) {
2018         tcc_add_include_path(s, path);
2019     }
2020     path = getenv("CPATH");
2021     if(path != NULL) {
2022         tcc_add_include_path(s, path);
2023     }
2024     path = getenv("LIBRARY_PATH");
2025     if(path != NULL) {
2026         tcc_add_library_path(s, path);
2027     }
2028 }