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     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         if (tcc_state->do_bounds_check) {
 466             char buf[32];
 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                      addr_t 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     nocode_wanted = 1;
 790
 791     if (setjmp(s1->error_jmp_buf) == 0) {
 792         s1->nb_errors = 0;
 793         s1->error_set_jmp_enabled = 1;
 794
 795         ch = file->buf_ptr[0];
 796         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 797         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 798         pvtop = vtop;
 799         next();
 800         decl(VT_CONST);
 801         if (tok != TOK_EOF)
 802             expect("declaration");
 803         if (pvtop != vtop)
 804             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 805
 806         /* end of translation unit info */
 807         if (s1->do_debug) {
 808             put_stabs_r(NULL, N_SO, 0, 0,
 809                         text_section->data_offset, text_section, section_sym);
 810         }
 811     }
 812
 813     s1->error_set_jmp_enabled = 0;
 814
 815     /* reset define stack, but leave -Dsymbols (may be incorrect if
 816        they are undefined) */
 817     free_defines(define_start);
 818
 819     gen_inline_functions();
 820
 821     sym_pop(&global_stack, NULL);
 822     sym_pop(&local_stack, NULL);
 823
 824     return s1->nb_errors != 0 ? -1 : 0;
 825 }
 826
 827 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 828 {
 829     int len, ret;
 830     len = strlen(str);
 831
 832     tcc_open_bf(s, "<string>", len);
 833     memcpy(file->buffer, str, len);
 834     ret = tcc_compile(s);
 835     tcc_close();
 836     return ret;
 837 }
 838
 839 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 840 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 841 {
 842     int len1, len2;
 843     /* default value */
 844     if (!value)
 845         value = "1";
 846     len1 = strlen(sym);
 847     len2 = strlen(value);
 848
 849     /* init file structure */
 850     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 851     memcpy(file->buffer, sym, len1);
 852     file->buffer[len1] = ' ';
 853     memcpy(file->buffer + len1 + 1, value, len2);
 854
 855     /* parse with define parser */
 856     ch = file->buf_ptr[0];
 857     next_nomacro();
 858     parse_define();
 859
 860     tcc_close();
 861 }
 862
 863 /* undefine a preprocessor symbol */
 864 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 865 {
 866     TokenSym *ts;
 867     Sym *s;
 868     ts = tok_alloc(sym, strlen(sym));
 869     s = define_find(ts->tok);
 870     /* undefine symbol by putting an invalid name */
 871     if (s)
 872         define_undef(s);
 873     tcc_free(ts);
 874 }
 875
 876 /* cleanup all static data used during compilation */
 877 static void tcc_cleanup(void)
 878 {
 879     int i, n;
 880     if (NULL == tcc_state)
 881         return;
 882     tcc_state = NULL;
 883
 884     /* free -D defines */
 885     free_defines(NULL);
 886
 887     /* free tokens */
 888     n = tok_ident - TOK_IDENT;
 889     for(i = 0; i < n; i++)
 890         tcc_free(table_ident[i]);
 891     tcc_free(table_ident);
 892     table_ident = NULL;
 893
 894     /* free sym_pools */
 895     dynarray_reset(&sym_pools, &nb_sym_pools);
 896     /* string buffer */
 897     cstr_free(&tokcstr);
 898     /* reset symbol stack */
 899     sym_free_first = NULL;
 900     /* cleanup from error/setjmp */
 901     macro_ptr = NULL;
 902 }
 903
 904 LIBTCCAPI TCCState *tcc_new(void)
 905 {
 906     TCCState *s;
 907     char buffer[100];
 908     int a,b,c;
 909
 910     tcc_cleanup();
 911
 912     s = tcc_mallocz(sizeof(TCCState));
 913     if (!s)
 914         return NULL;
 915     tcc_state = s;
 916 #ifdef _WIN32
 917     tcc_set_lib_path_w32(s);
 918 #else
 919     tcc_set_lib_path(s, CONFIG_TCCDIR);
 920 #endif
 921     s->output_type = 0;
 922     preprocess_new();
 923     s->include_stack_ptr = s->include_stack;
 924
 925     /* we add dummy defines for some special macros to speed up tests
 926        and to have working defined() */
 927     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 928     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 929     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 930     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 931
 932     /* define __TINYC__ 92X  */
 933     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 934     sprintf(buffer, "%d", a*10000 + b*100 + c);
 935     tcc_define_symbol(s, "__TINYC__", buffer);
 936
 937     /* standard defines */
 938     tcc_define_symbol(s, "__STDC__", NULL);
 939     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 940     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 941
 942     /* target defines */
 943 #if defined(TCC_TARGET_I386)
 944     tcc_define_symbol(s, "__i386__", NULL);
 945     tcc_define_symbol(s, "__i386", NULL);
 946     tcc_define_symbol(s, "i386", NULL);
 947 #elif defined(TCC_TARGET_X86_64)
 948     tcc_define_symbol(s, "__x86_64__", NULL);
 949 #elif defined(TCC_TARGET_ARM)
 950     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 951     tcc_define_symbol(s, "__arm_elf__", NULL);
 952     tcc_define_symbol(s, "__arm_elf", NULL);
 953     tcc_define_symbol(s, "arm_elf", NULL);
 954     tcc_define_symbol(s, "__arm__", NULL);
 955     tcc_define_symbol(s, "__arm", NULL);
 956     tcc_define_symbol(s, "arm", NULL);
 957     tcc_define_symbol(s, "__APCS_32__", NULL);
 958     tcc_define_symbol(s, "__ARMEL__", NULL);
 959 #if defined(TCC_ARM_EABI)
 960     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 961 #endif
 962 #if defined(TCC_ARM_HARDFLOAT)
 963     s->float_abi = ARM_HARD_FLOAT;
 964     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 965 #else
 966     s->float_abi = ARM_SOFTFP_FLOAT;
 967 #endif
 968 #elif defined(TCC_TARGET_ARM64)
 969     tcc_define_symbol(s, "__aarch64__", NULL);
 970 #endif
 971
 972 #ifdef TCC_TARGET_PE
 973     tcc_define_symbol(s, "_WIN32", NULL);
 974 # ifdef TCC_TARGET_X86_64
 975     tcc_define_symbol(s, "_WIN64", NULL);
 976 # endif
 977 #else
 978     tcc_define_symbol(s, "__unix__", NULL);
 979     tcc_define_symbol(s, "__unix", NULL);
 980     tcc_define_symbol(s, "unix", NULL);
 981 # if defined(__linux)
 982     tcc_define_symbol(s, "__linux__", NULL);
 983     tcc_define_symbol(s, "__linux", NULL);
 984 # endif
 985 # if defined(__FreeBSD__)
 986 #  define str(s) #s
 987     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 988 #  undef str
 989 # endif
 990 # if defined(__FreeBSD_kernel__)
 991     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 992 # endif
 993 #endif
 994
 995     /* TinyCC & gcc defines */
 996 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 997     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 998     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 999 #else
1000     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1001     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1002 #endif
1003
1004 #ifdef TCC_TARGET_PE
1005     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1006     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1007 #else
1008     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1009     /* wint_t is unsigned int by default, but (signed) int on BSDs
1010        and unsigned short on windows.  Other OSes might have still
1011        other conventions, sigh.  */
1012 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
1013     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1014 #else
1015     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1016 #endif
1017 #endif
1018
1019 #ifndef TCC_TARGET_PE
1020     /* glibc defines */
1021     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1022     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1023     /* paths for crt objects */
1024     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1025 #endif
1026
1027     /* no section zero */
1028     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1029
1030     /* create standard sections */
1031     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1032     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1033     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1034
1035     /* symbols are always generated for linking stage */
1036     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1037                                 ".strtab",
1038                                 ".hashtab", SHF_PRIVATE);
1039     strtab_section = symtab_section->link;
1040     s->symtab = symtab_section;
1041
1042     /* private symbol table for dynamic symbols */
1043     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1044                                       ".dynstrtab",
1045                                       ".dynhashtab", SHF_PRIVATE);
1046     s->alacarte_link = 1;
1047     s->nocommon = 1;
1048     s->warn_implicit_function_declaration = 1;
1049
1050 #ifdef CHAR_IS_UNSIGNED
1051     s->char_is_unsigned = 1;
1052 #endif
1053     /* enable this if you want symbols with leading underscore on windows: */
1054 #if 0 /* def TCC_TARGET_PE */
1055     s->leading_underscore = 1;
1056 #endif
1057 #ifdef TCC_TARGET_I386
1058     s->seg_size = 32;
1059 #endif
1060 #ifdef TCC_IS_NATIVE
1061     s->runtime_main = "main";
1062 #endif
1063     return s;
1064 }
1065
1066 LIBTCCAPI void tcc_delete(TCCState *s1)
1067 {
1068     int i;
1069
1070     tcc_cleanup();
1071
1072     /* free all sections */
1073     for(i = 1; i < s1->nb_sections; i++)
1074         free_section(s1->sections[i]);
1075     dynarray_reset(&s1->sections, &s1->nb_sections);
1076
1077     for(i = 0; i < s1->nb_priv_sections; i++)
1078         free_section(s1->priv_sections[i]);
1079     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1080
1081     /* free any loaded DLLs */
1082 #ifdef TCC_IS_NATIVE
1083     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1084         DLLReference *ref = s1->loaded_dlls[i];
1085         if ( ref->handle )
1086             dlclose(ref->handle);
1087     }
1088 #endif
1089
1090     /* free loaded dlls array */
1091     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1092
1093     /* free library paths */
1094     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1095     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1096
1097     /* free include paths */
1098     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1099     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1100     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1101
1102     tcc_free(s1->tcc_lib_path);
1103     tcc_free(s1->soname);
1104     tcc_free(s1->rpath);
1105     tcc_free(s1->init_symbol);
1106     tcc_free(s1->fini_symbol);
1107     tcc_free(s1->outfile);
1108     tcc_free(s1->deps_outfile);
1109     dynarray_reset(&s1->files, &s1->nb_files);
1110     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1111
1112 #ifdef TCC_IS_NATIVE
1113 # ifdef HAVE_SELINUX
1114     munmap (s1->write_mem, s1->mem_size);
1115     munmap (s1->runtime_mem, s1->mem_size);
1116 # else
1117     tcc_free(s1->runtime_mem);
1118 # endif
1119 #endif
1120
1121     if(s1->sym_attrs) tcc_free(s1->sym_attrs);
1122
1123     tcc_free(s1);
1124 }
1125
1126 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1127 {
1128     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1129     return 0;
1130 }
1131
1132 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1133 {
1134     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1135     return 0;
1136 }
1137
1138 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1139 {
1140     const char *ext;
1141     ElfW(Ehdr) ehdr;
1142     int fd, ret, size;
1143
1144     /* find source file type with extension */
1145     ext = tcc_fileextension(filename);
1146     if (ext[0])
1147         ext++;
1148
1149     parse_flags = 0;
1150 #ifdef CONFIG_TCC_ASM
1151     /* if .S file, define __ASSEMBLER__ like gcc does */
1152     if (!strcmp(ext, "S") || !strcmp(ext, "s")) {
1153         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1154         parse_flags = PARSE_FLAG_ASM_FILE;
1155     }
1156 #endif
1157
1158     /* open the file */
1159     ret = tcc_open(s1, filename);
1160     if (ret < 0) {
1161         if (flags & AFF_PRINT_ERROR)
1162             tcc_error_noabort("file '%s' not found", filename);
1163         return ret;
1164     }
1165
1166     /* update target deps */
1167     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1168             tcc_strdup(filename));
1169
1170     if (flags & AFF_PREPROCESS) {
1171         ret = tcc_preprocess(s1);
1172         goto the_end;
1173     }
1174
1175     if (!ext[0] || !PATHCMP(ext, "c") || !PATHCMP(ext, "i")) {
1176         /* C file assumed */
1177         ret = tcc_compile(s1);
1178         goto the_end;
1179     }
1180
1181 #ifdef CONFIG_TCC_ASM
1182     if (!strcmp(ext, "S")) {
1183         /* non preprocessed assembler */
1184         ret = tcc_assemble(s1, 1);
1185         goto the_end;
1186     }
1187
1188     if (!strcmp(ext, "s")) {
1189         /* preprocessed assembler */
1190         ret = tcc_assemble(s1, 0);
1191         goto the_end;
1192     }
1193 #endif
1194
1195     fd = file->fd;
1196     /* assume executable format: auto guess file type */
1197     size = read(fd, &ehdr, sizeof(ehdr));
1198     lseek(fd, 0, SEEK_SET);
1199     if (size <= 0) {
1200         tcc_error_noabort("could not read header");
1201         goto the_end;
1202     }
1203
1204     if (size == sizeof(ehdr) &&
1205         ehdr.e_ident[0] == ELFMAG0 &&
1206         ehdr.e_ident[1] == ELFMAG1 &&
1207         ehdr.e_ident[2] == ELFMAG2 &&
1208         ehdr.e_ident[3] == ELFMAG3) {
1209
1210         /* do not display line number if error */
1211         file->line_num = 0;
1212         if (ehdr.e_type == ET_REL) {
1213             ret = tcc_load_object_file(s1, fd, 0);
1214             goto the_end;
1215
1216         }
1217 #ifndef TCC_TARGET_PE
1218         if (ehdr.e_type == ET_DYN) {
1219             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1220 #ifdef TCC_IS_NATIVE
1221                 void *h;
1222                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1223                 if (h)
1224 #endif
1225                     ret = 0;
1226             } else {
1227                 ret = tcc_load_dll(s1, fd, filename,
1228                                    (flags & AFF_REFERENCED_DLL) != 0);
1229             }
1230             goto the_end;
1231         }
1232 #endif
1233         tcc_error_noabort("unrecognized ELF file");
1234         goto the_end;
1235     }
1236
1237     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1238         file->line_num = 0; /* do not display line number if error */
1239         ret = tcc_load_archive(s1, fd);
1240         goto the_end;
1241     }
1242
1243 #ifdef TCC_TARGET_COFF
1244     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1245         ret = tcc_load_coff(s1, fd);
1246         goto the_end;
1247     }
1248 #endif
1249
1250 #ifdef TCC_TARGET_PE
1251     ret = pe_load_file(s1, filename, fd);
1252 #else
1253     /* as GNU ld, consider it is an ld script if not recognized */
1254     ret = tcc_load_ldscript(s1);
1255 #endif
1256     if (ret < 0)
1257         tcc_error_noabort("unrecognized file type");
1258
1259 the_end:
1260     tcc_close();
1261     return ret;
1262 }
1263
1264 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1265 {
1266     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1267         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1268     else
1269         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1270 }
1271
1272 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1273 {
1274     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1275     return 0;
1276 }
1277
1278 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1279     const char *filename, int flags, char **paths, int nb_paths)
1280 {
1281     char buf[1024];
1282     int i;
1283
1284     for(i = 0; i < nb_paths; i++) {
1285         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1286         if (tcc_add_file_internal(s, buf, flags) == 0)
1287             return 0;
1288     }
1289     return -1;
1290 }
1291
1292 /* find and load a dll. Return non zero if not found */
1293 /* XXX: add '-rpath' option support ? */
1294 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1295 {
1296     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1297         s->library_paths, s->nb_library_paths);
1298 }
1299
1300 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1301 {
1302     if (-1 == tcc_add_library_internal(s, "%s/%s",
1303         filename, 0, s->crt_paths, s->nb_crt_paths))
1304         tcc_error_noabort("file '%s' not found", filename);
1305     return 0;
1306 }
1307
1308 /* the library name is the same as the argument of the '-l' option */
1309 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1310 {
1311 #ifdef TCC_TARGET_PE
1312     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1313     const char **pp = s->static_link ? libs + 4 : libs;
1314 #else
1315     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1316     const char **pp = s->static_link ? libs + 1 : libs;
1317 #endif
1318     while (*pp) {
1319         if (0 == tcc_add_library_internal(s, *pp,
1320             libraryname, 0, s->library_paths, s->nb_library_paths))
1321             return 0;
1322         ++pp;
1323     }
1324     return -1;
1325 }
1326
1327 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1328 {
1329 #ifdef TCC_TARGET_PE
1330     /* On x86_64 'val' might not be reachable with a 32bit offset.
1331        So it is handled here as if it were in a DLL. */
1332     pe_putimport(s, 0, name, (uintptr_t)val);
1333 #else
1334     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1335         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1336         SHN_ABS, name);
1337 #endif
1338     return 0;
1339 }
1340
1341 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1342 {
1343     s->output_type = output_type;
1344     if (output_type == TCC_OUTPUT_PREPROCESS)
1345         print_defines();
1346
1347     if (!s->nostdinc) {
1348         /* default include paths */
1349         /* -isystem paths have already been handled */
1350         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1351     }
1352
1353     /* if bound checking, then add corresponding sections */
1354 #ifdef CONFIG_TCC_BCHECK
1355     if (s->do_bounds_check) {
1356         /* define symbol */
1357         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1358         /* create bounds sections */
1359         bounds_section = new_section(s, ".bounds",
1360                                      SHT_PROGBITS, SHF_ALLOC);
1361         lbounds_section = new_section(s, ".lbounds",
1362                                       SHT_PROGBITS, SHF_ALLOC);
1363     }
1364 #endif
1365
1366     if (s->char_is_unsigned) {
1367         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1368     }
1369
1370     /* add debug sections */
1371     if (s->do_debug) {
1372         /* stab symbols */
1373         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1374         stab_section->sh_entsize = sizeof(Stab_Sym);
1375         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1376         put_elf_str(stabstr_section, "");
1377         stab_section->link = stabstr_section;
1378         /* put first entry */
1379         put_stabs("", 0, 0, 0, 0);
1380     }
1381
1382     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1383 #ifdef TCC_TARGET_PE
1384 # ifdef _WIN32
1385     tcc_add_systemdir(s);
1386 # endif
1387 #else
1388     /* add libc crt1/crti objects */
1389     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1390         !s->nostdlib) {
1391         if (output_type != TCC_OUTPUT_DLL)
1392             tcc_add_crt(s, "crt1.o");
1393         tcc_add_crt(s, "crti.o");
1394     }
1395 #endif
1396
1397 #ifdef CONFIG_TCC_BCHECK
1398     if (s->do_bounds_check && (output_type == TCC_OUTPUT_EXE))
1399     {
1400         /* XXX force a bcheck.o linking by compiling a function with a local array.
1401         Otherwise bcheck.o may be not linked. */
1402
1403         if (tcc_compile_string(s, "static void __bound_check_dummy_func(){int v[1];}") == -1)
1404             tcc_warning("compiling __bound_check_dummy_func failed");
1405     }
1406 #endif
1407     return 0;
1408 }
1409
1410 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1411 {
1412     tcc_free(s->tcc_lib_path);
1413     s->tcc_lib_path = tcc_strdup(path);
1414 }
1415
1416 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1417 #define FD_INVERT 0x0002 /* invert value before storing */
1418
1419 typedef struct FlagDef {
1420     uint16_t offset;
1421     uint16_t flags;
1422     const char *name;
1423 } FlagDef;
1424
1425 static const FlagDef warning_defs[] = {
1426     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1427     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1428     { offsetof(TCCState, warn_error), 0, "error" },
1429     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1430       "implicit-function-declaration" },
1431 };
1432
1433 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1434                     const char *name, int value)
1435 {
1436     int i;
1437     const FlagDef *p;
1438     const char *r;
1439
1440     r = name;
1441     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1442         r += 3;
1443         value = !value;
1444     }
1445     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1446         if (!strcmp(r, p->name))
1447             goto found;
1448     }
1449     return -1;
1450  found:
1451     if (p->flags & FD_INVERT)
1452         value = !value;
1453     *(int *)((uint8_t *)s + p->offset) = value;
1454     return 0;
1455 }
1456
1457 /* set/reset a warning */
1458 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1459 {
1460     int i;
1461     const FlagDef *p;
1462
1463     if (!strcmp(warning_name, "all")) {
1464         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1465             if (p->flags & WD_ALL)
1466                 *(int *)((uint8_t *)s + p->offset) = 1;
1467         }
1468         return 0;
1469     } else {
1470         return set_flag(s, warning_defs, countof(warning_defs),
1471                         warning_name, value);
1472     }
1473 }
1474
1475 static const FlagDef flag_defs[] = {
1476     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1477     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1478     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1479     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1480     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1481     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1482 };
1483
1484 /* set/reset a flag */
1485 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1486 {
1487     return set_flag(s, flag_defs, countof(flag_defs),
1488                     flag_name, value);
1489 }
1490
1491
1492 static int strstart(const char *val, const char **str)
1493 {
1494     const char *p, *q;
1495     p = *str;
1496     q = val;
1497     while (*q) {
1498         if (*p != *q)
1499             return 0;
1500         p++;
1501         q++;
1502     }
1503     *str = p;
1504     return 1;
1505 }
1506
1507 /* Like strstart, but automatically takes into account that ld options can
1508  *
1509  * - start with double or single dash (e.g. '--soname' or '-soname')
1510  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1511  *   or '-Wl,-soname=x.so')
1512  *
1513  * you provide `val` always in 'option[=]' form (no leading -)
1514  */
1515 static int link_option(const char *str, const char *val, const char **ptr)
1516 {
1517     const char *p, *q;
1518
1519     /* there should be 1 or 2 dashes */
1520     if (*str++ != '-')
1521         return 0;
1522     if (*str == '-')
1523         str++;
1524
1525     /* then str & val should match (potentialy up to '=') */
1526     p = str;
1527     q = val;
1528
1529     while (*q != '\0' && *q != '=') {
1530         if (*p != *q)
1531             return 0;
1532         p++;
1533         q++;
1534     }
1535
1536     /* '=' near eos means ',' or '=' is ok */
1537     if (*q == '=') {
1538         if (*p != ',' && *p != '=')
1539             return 0;
1540         p++;
1541         q++;
1542     }
1543
1544     if (ptr)
1545         *ptr = p;
1546     return 1;
1547 }
1548
1549 static const char *skip_linker_arg(const char **str)
1550 {
1551     const char *s1 = *str;
1552     const char *s2 = strchr(s1, ',');
1553     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1554     return s2;
1555 }
1556
1557 static char *copy_linker_arg(const char *p)
1558 {
1559     const char *q = p;
1560     skip_linker_arg(&q);
1561     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1562 }
1563
1564 /* set linker options */
1565 static int tcc_set_linker(TCCState *s, const char *option)
1566 {
1567     while (option && *option) {
1568
1569         const char *p = option;
1570         char *end = NULL;
1571         int ignoring = 0;
1572
1573         if (link_option(option, "Bsymbolic", &p)) {
1574             s->symbolic = 1;
1575         } else if (link_option(option, "nostdlib", &p)) {
1576             s->nostdlib = 1;
1577         } else if (link_option(option, "fini=", &p)) {
1578             s->fini_symbol = copy_linker_arg(p);
1579             ignoring = 1;
1580         } else if (link_option(option, "image-base=", &p)
1581                 || link_option(option, "Ttext=", &p)) {
1582             s->text_addr = strtoull(p, &end, 16);
1583             s->has_text_addr = 1;
1584         } else if (link_option(option, "init=", &p)) {
1585             s->init_symbol = copy_linker_arg(p);
1586             ignoring = 1;
1587         } else if (link_option(option, "oformat=", &p)) {
1588 #if defined(TCC_TARGET_PE)
1589             if (strstart("pe-", &p)) {
1590 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1591             if (strstart("elf64-", &p)) {
1592 #else
1593             if (strstart("elf32-", &p)) {
1594 #endif
1595                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1596             } else if (!strcmp(p, "binary")) {
1597                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1598 #ifdef TCC_TARGET_COFF
1599             } else if (!strcmp(p, "coff")) {
1600                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1601 #endif
1602             } else
1603                 goto err;
1604
1605         } else if (link_option(option, "as-needed", &p)) {
1606             ignoring = 1;
1607         } else if (link_option(option, "O", &p)) {
1608             ignoring = 1;
1609         } else if (link_option(option, "rpath=", &p)) {
1610             s->rpath = copy_linker_arg(p);
1611         } else if (link_option(option, "section-alignment=", &p)) {
1612             s->section_align = strtoul(p, &end, 16);
1613         } else if (link_option(option, "soname=", &p)) {
1614             s->soname = copy_linker_arg(p);
1615 #ifdef TCC_TARGET_PE
1616         } else if (link_option(option, "file-alignment=", &p)) {
1617             s->pe_file_align = strtoul(p, &end, 16);
1618         } else if (link_option(option, "stack=", &p)) {
1619             s->pe_stack_size = strtoul(p, &end, 10);
1620         } else if (link_option(option, "subsystem=", &p)) {
1621 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1622             if (!strcmp(p, "native")) {
1623                 s->pe_subsystem = 1;
1624             } else if (!strcmp(p, "console")) {
1625                 s->pe_subsystem = 3;
1626             } else if (!strcmp(p, "gui")) {
1627                 s->pe_subsystem = 2;
1628             } else if (!strcmp(p, "posix")) {
1629                 s->pe_subsystem = 7;
1630             } else if (!strcmp(p, "efiapp")) {
1631                 s->pe_subsystem = 10;
1632             } else if (!strcmp(p, "efiboot")) {
1633                 s->pe_subsystem = 11;
1634             } else if (!strcmp(p, "efiruntime")) {
1635                 s->pe_subsystem = 12;
1636             } else if (!strcmp(p, "efirom")) {
1637                 s->pe_subsystem = 13;
1638 #elif defined(TCC_TARGET_ARM)
1639             if (!strcmp(p, "wince")) {
1640                 s->pe_subsystem = 9;
1641 #endif
1642             } else
1643                 goto err;
1644 #endif
1645         } else
1646             goto err;
1647
1648         if (ignoring && s->warn_unsupported) err: {
1649             char buf[100], *e;
1650             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1651             if (ignoring)
1652                 tcc_warning("unsupported linker option '%s'", buf);
1653             else
1654                 tcc_error("unsupported linker option '%s'", buf);
1655         }
1656         option = skip_linker_arg(&p);
1657     }
1658     return 0;
1659 }
1660
1661 typedef struct TCCOption {
1662     const char *name;
1663     uint16_t index;
1664     uint16_t flags;
1665 } TCCOption;
1666
1667 enum {
1668     TCC_OPTION_HELP,
1669     TCC_OPTION_I,
1670     TCC_OPTION_D,
1671     TCC_OPTION_U,
1672     TCC_OPTION_P,
1673     TCC_OPTION_L,
1674     TCC_OPTION_B,
1675     TCC_OPTION_l,
1676     TCC_OPTION_bench,
1677     TCC_OPTION_bt,
1678     TCC_OPTION_b,
1679     TCC_OPTION_g,
1680     TCC_OPTION_c,
1681     TCC_OPTION_dumpversion,
1682     TCC_OPTION_d,
1683     TCC_OPTION_float_abi,
1684     TCC_OPTION_static,
1685     TCC_OPTION_std,
1686     TCC_OPTION_shared,
1687     TCC_OPTION_soname,
1688     TCC_OPTION_o,
1689     TCC_OPTION_r,
1690     TCC_OPTION_s,
1691     TCC_OPTION_Wl,
1692     TCC_OPTION_W,
1693     TCC_OPTION_O,
1694     TCC_OPTION_m,
1695     TCC_OPTION_f,
1696     TCC_OPTION_isystem,
1697     TCC_OPTION_nostdinc,
1698     TCC_OPTION_nostdlib,
1699     TCC_OPTION_print_search_dirs,
1700     TCC_OPTION_rdynamic,
1701     TCC_OPTION_pedantic,
1702     TCC_OPTION_pthread,
1703     TCC_OPTION_run,
1704     TCC_OPTION_v,
1705     TCC_OPTION_w,
1706     TCC_OPTION_pipe,
1707     TCC_OPTION_E,
1708     TCC_OPTION_MD,
1709     TCC_OPTION_MF,
1710     TCC_OPTION_x,
1711 };
1712
1713 #define TCC_OPTION_HAS_ARG 0x0001
1714 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1715
1716 static const TCCOption tcc_options[] = {
1717     { "h", TCC_OPTION_HELP, 0 },
1718     { "-help", TCC_OPTION_HELP, 0 },
1719     { "?", TCC_OPTION_HELP, 0 },
1720     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1721     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1722     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1723     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1724     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1725     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1726     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1727     { "bench", TCC_OPTION_bench, 0 },
1728 #ifdef CONFIG_TCC_BACKTRACE
1729     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1730 #endif
1731 #ifdef CONFIG_TCC_BCHECK
1732     { "b", TCC_OPTION_b, 0 },
1733 #endif
1734     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1735     { "c", TCC_OPTION_c, 0 },
1736     { "dumpversion", TCC_OPTION_dumpversion, 0},
1737     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1738 #ifdef TCC_TARGET_ARM
1739     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1740 #endif
1741     { "static", TCC_OPTION_static, 0 },
1742     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1743     { "shared", TCC_OPTION_shared, 0 },
1744     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1745     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1746     { "pedantic", TCC_OPTION_pedantic, 0},
1747     { "pthread", TCC_OPTION_pthread, 0},
1748     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1749     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1750     { "r", TCC_OPTION_r, 0 },
1751     { "s", TCC_OPTION_s, 0 },
1752     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1753     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1754     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1755     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1756     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1757     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1758     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1759     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1760     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1761     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1762     { "w", TCC_OPTION_w, 0 },
1763     { "pipe", TCC_OPTION_pipe, 0},
1764     { "E", TCC_OPTION_E, 0},
1765     { "MD", TCC_OPTION_MD, 0},
1766     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1767     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1768     { NULL, 0, 0 },
1769 };
1770
1771 static void parse_option_D(TCCState *s1, const char *optarg)
1772 {
1773     char *sym = tcc_strdup(optarg);
1774     char *value = strchr(sym, '=');
1775     if (value)
1776         *value++ = '\0';
1777     tcc_define_symbol(s1, sym, value);
1778     tcc_free(sym);
1779 }
1780
1781 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1782 {
1783     const TCCOption *popt;
1784     const char *optarg, *r;
1785     int run = 0;
1786     int pthread = 0;
1787     int optind = 0;
1788
1789     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1790     CString linker_arg;
1791     cstr_new(&linker_arg);
1792
1793     while (optind < argc) {
1794
1795         r = argv[optind++];
1796         if (r[0] != '-' || r[1] == '\0') {
1797             /* add a new file */
1798             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1799             if (run) {
1800                 optind--;
1801                 /* argv[0] will be this file */
1802                 break;
1803             }
1804             continue;
1805         }
1806
1807         /* find option in table */
1808         for(popt = tcc_options; ; ++popt) {
1809             const char *p1 = popt->name;
1810             const char *r1 = r + 1;
1811             if (p1 == NULL)
1812                 tcc_error("invalid option -- '%s'", r);
1813             if (!strstart(p1, &r1))
1814                 continue;
1815             optarg = r1;
1816             if (popt->flags & TCC_OPTION_HAS_ARG) {
1817                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1818                     if (optind >= argc)
1819                         tcc_error("argument to '%s' is missing", r);
1820                     optarg = argv[optind++];
1821                 }
1822             } else if (*r1 != '\0')
1823                 continue;
1824             break;
1825         }
1826
1827         switch(popt->index) {
1828         case TCC_OPTION_HELP:
1829             return 0;
1830         case TCC_OPTION_I:
1831             if (tcc_add_include_path(s, optarg) < 0)
1832                 tcc_error("too many include paths");
1833             break;
1834         case TCC_OPTION_D:
1835             parse_option_D(s, optarg);
1836             break;
1837         case TCC_OPTION_U:
1838             tcc_undefine_symbol(s, optarg);
1839             break;
1840         case TCC_OPTION_L:
1841             tcc_add_library_path(s, optarg);
1842             break;
1843         case TCC_OPTION_B:
1844             /* set tcc utilities path (mainly for tcc development) */
1845             tcc_set_lib_path(s, optarg);
1846             break;
1847         case TCC_OPTION_l:
1848             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1849             s->nb_libraries++;
1850             break;
1851         case TCC_OPTION_pthread:
1852             parse_option_D(s, "_REENTRANT");
1853             pthread = 1;
1854             break;
1855         case TCC_OPTION_bench:
1856             s->do_bench = 1;
1857             break;
1858 #ifdef CONFIG_TCC_BACKTRACE
1859         case TCC_OPTION_bt:
1860             tcc_set_num_callers(atoi(optarg));
1861             break;
1862 #endif
1863 #ifdef CONFIG_TCC_BCHECK
1864         case TCC_OPTION_b:
1865             s->do_bounds_check = 1;
1866             s->do_debug = 1;
1867             break;
1868 #endif
1869         case TCC_OPTION_g:
1870             s->do_debug = 1;
1871             break;
1872         case TCC_OPTION_c:
1873             if (s->output_type)
1874                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
1875             s->output_type = TCC_OUTPUT_OBJ;
1876             break;
1877         case TCC_OPTION_d:
1878             if (*optarg != 'D') {
1879                 if (s->warn_unsupported)
1880                     goto unsupported_option;
1881                  tcc_error("invalid option -- '%s'", r);
1882             }
1883             s->dflag = 1;
1884             break;
1885 #ifdef TCC_TARGET_ARM
1886         case TCC_OPTION_float_abi:
1887             /* tcc doesn't support soft float yet */
1888             if (!strcmp(optarg, "softfp")) {
1889                 s->float_abi = ARM_SOFTFP_FLOAT;
1890                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1891             } else if (!strcmp(optarg, "hard"))
1892                 s->float_abi = ARM_HARD_FLOAT;
1893             else
1894                 tcc_error("unsupported float abi '%s'", optarg);
1895             break;
1896 #endif
1897         case TCC_OPTION_static:
1898             s->static_link = 1;
1899             break;
1900         case TCC_OPTION_std:
1901             /* silently ignore, a current purpose:
1902                allow to use a tcc as a reference compiler for "make test" */
1903             break;
1904         case TCC_OPTION_shared:
1905             if (s->output_type)
1906                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
1907             s->output_type = TCC_OUTPUT_DLL;
1908             break;
1909         case TCC_OPTION_soname:
1910             s->soname = tcc_strdup(optarg);
1911             break;
1912         case TCC_OPTION_m:
1913             s->option_m = tcc_strdup(optarg);
1914             break;
1915         case TCC_OPTION_o:
1916             s->outfile = tcc_strdup(optarg);
1917             break;
1918         case TCC_OPTION_r:
1919             /* generate a .o merging several output files */
1920             if (s->output_type)
1921                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
1922             s->option_r = 1;
1923             s->output_type = TCC_OUTPUT_OBJ;
1924             break;
1925         case TCC_OPTION_isystem:
1926             tcc_add_sysinclude_path(s, optarg);
1927             break;
1928         case TCC_OPTION_nostdinc:
1929             s->nostdinc = 1;
1930             break;
1931         case TCC_OPTION_nostdlib:
1932             s->nostdlib = 1;
1933             break;
1934         case TCC_OPTION_print_search_dirs:
1935             s->print_search_dirs = 1;
1936             break;
1937         case TCC_OPTION_run:
1938             if (s->output_type)
1939                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
1940             s->output_type = TCC_OUTPUT_MEMORY;
1941             tcc_set_options(s, optarg);
1942             run = 1;
1943             break;
1944         case TCC_OPTION_v:
1945             do ++s->verbose; while (*optarg++ == 'v');
1946             break;
1947         case TCC_OPTION_f:
1948             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1949                 goto unsupported_option;
1950             break;
1951         case TCC_OPTION_W:
1952             if (tcc_set_warning(s, optarg, 1) < 0 &&
1953                 s->warn_unsupported)
1954                 goto unsupported_option;
1955             break;
1956         case TCC_OPTION_w:
1957             s->warn_none = 1;
1958             break;
1959         case TCC_OPTION_rdynamic:
1960             s->rdynamic = 1;
1961             break;
1962         case TCC_OPTION_Wl:
1963             if (linker_arg.size)
1964                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1965             cstr_cat(&linker_arg, optarg);
1966             cstr_ccat(&linker_arg, '\0');
1967             break;
1968         case TCC_OPTION_E:
1969             if (s->output_type)
1970                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
1971             s->output_type = TCC_OUTPUT_PREPROCESS;
1972             break;
1973         case TCC_OPTION_P:
1974             s->Pflag = atoi(optarg) + 1;
1975             break;
1976         case TCC_OPTION_MD:
1977             s->gen_deps = 1;
1978             break;
1979         case TCC_OPTION_MF:
1980             s->deps_outfile = tcc_strdup(optarg);
1981             break;
1982         case TCC_OPTION_dumpversion:
1983             printf ("%s\n", TCC_VERSION);
1984             exit(0);
1985         case TCC_OPTION_s:
1986             s->do_strip = 1;
1987             break;
1988         case TCC_OPTION_O:
1989         case TCC_OPTION_pedantic:
1990         case TCC_OPTION_pipe:
1991         case TCC_OPTION_x:
1992             /* ignored */
1993             break;
1994         default:
1995             if (s->warn_unsupported) {
1996             unsupported_option:
1997                 tcc_warning("unsupported option '%s'", r);
1998             }
1999             break;
2000         }
2001     }
2002
2003     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
2004         tcc_set_options(s, "-lpthread");
2005
2006     tcc_set_linker(s, (const char *)linker_arg.data);
2007     cstr_free(&linker_arg);
2008
2009     return optind;
2010 }
2011
2012 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
2013 {
2014     const char *s1;
2015     char **argv, *arg;
2016     int argc, len;
2017     int ret;
2018
2019     argc = 0, argv = NULL;
2020     for(;;) {
2021         while (is_space(*str))
2022             str++;
2023         if (*str == '\0')
2024             break;
2025         s1 = str;
2026         while (*str != '\0' && !is_space(*str))
2027             str++;
2028         len = str - s1;
2029         arg = tcc_malloc(len + 1);
2030         pstrncpy(arg, s1, len);
2031         dynarray_add((void ***)&argv, &argc, arg);
2032     }
2033     ret = tcc_parse_args(s, argc, argv);
2034     dynarray_reset(&argv, &argc);
2035     return ret;
2036 }
2037
2038 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2039 {
2040     double tt;
2041     tt = (double)total_time / 1000000.0;
2042     if (tt < 0.001)
2043         tt = 0.001;
2044     if (total_bytes < 1)
2045         total_bytes = 1;
2046     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2047            tok_ident - TOK_IDENT, total_lines, total_bytes,
2048            tt, (int)(total_lines / tt),
2049            total_bytes / tt / 1000000.0);
2050 }
2051
2052 PUB_FUNC void tcc_set_environment(TCCState *s)
2053 {
2054     char * path;
2055
2056     path = getenv("C_INCLUDE_PATH");
2057     if(path != NULL) {
2058         tcc_add_include_path(s, path);
2059     }
2060     path = getenv("CPATH");
2061     if(path != NULL) {
2062         tcc_add_include_path(s, path);
2063     }
2064     path = getenv("LIBRARY_PATH");
2065     if(path != NULL) {
2066         tcc_add_library_path(s, path);
2067     }
2068 }