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 #if !defined ONE_SOURCE || ONE_SOURCE
  22 #include "tccpp.c"
  23 #include "tccgen.c"
  24 #include "tccdbg.c"
  25 #include "tccasm.c"
  26 #include "tccelf.c"
  27 #include "tccrun.c"
  28 #ifdef TCC_TARGET_I386
  29 #include "i386-gen.c"
  30 #include "i386-link.c"
  31 #include "i386-asm.c"
  32 #elif defined(TCC_TARGET_ARM)
  33 #include "arm-gen.c"
  34 #include "arm-link.c"
  35 #include "arm-asm.c"
  36 #elif defined(TCC_TARGET_ARM64)
  37 #include "arm64-gen.c"
  38 #include "arm64-link.c"
  39 #include "arm-asm.c"
  40 #elif defined(TCC_TARGET_C67)
  41 #include "c67-gen.c"
  42 #include "c67-link.c"
  43 #include "tcccoff.c"
  44 #elif defined(TCC_TARGET_X86_64)
  45 #include "x86_64-gen.c"
  46 #include "x86_64-link.c"
  47 #include "i386-asm.c"
  48 #elif defined(TCC_TARGET_RISCV64)
  49 #include "riscv64-gen.c"
  50 #include "riscv64-link.c"
  51 #include "riscv64-asm.c"
  52 #else
  53 #error unknown target
  54 #endif
  55 #ifdef TCC_TARGET_PE
  56 #include "tccpe.c"
  57 #endif
  58 #ifdef TCC_TARGET_MACHO
  59 #include "tccmacho.c"
  60 #endif
  61 #endif /* ONE_SOURCE */
  62
  63 #include "tcc.h"
  64
  65 /********************************************************/
  66 /* global variables */
  67
  68 /* XXX: get rid of this ASAP (or maybe not) */
  69 ST_DATA struct TCCState *tcc_state;
  70 TCC_SEM(static tcc_compile_sem);
  71
  72 #ifdef MEM_DEBUG
  73 static int nb_states;
  74 #endif
  75
  76 /********************************************************/
  77 #ifdef _WIN32
  78 ST_FUNC char *normalize_slashes(char *path)
  79 {
  80     char *p;
  81     for (p = path; *p; ++p)
  82         if (*p == '\\')
  83             *p = '/';
  84     return path;
  85 }
  86
  87 #if defined LIBTCC_AS_DLL && !defined CONFIG_TCCDIR
  88 static HMODULE tcc_module;
  89 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
  90 {
  91     if (DLL_PROCESS_ATTACH == dwReason)
  92         tcc_module = hDll;
  93     return TRUE;
  94 }
  95 #else
  96 #define tcc_module NULL /* NULL means executable itself */
  97 #endif
  98
  99 #ifndef CONFIG_TCCDIR
 100 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 101 static inline char *config_tccdir_w32(char *path)
 102 {
 103     char *p;
 104     GetModuleFileName(tcc_module, path, MAX_PATH);
 105     p = tcc_basename(normalize_slashes(strlwr(path)));
 106     if (p > path)
 107         --p;
 108     *p = 0;
 109     return path;
 110 }
 111 #define CONFIG_TCCDIR config_tccdir_w32(alloca(MAX_PATH))
 112 #endif
 113
 114 #ifdef TCC_TARGET_PE
 115 static void tcc_add_systemdir(TCCState *s)
 116 {
 117     char buf[1000];
 118     GetSystemDirectory(buf, sizeof buf);
 119     tcc_add_library_path(s, normalize_slashes(buf));
 120 }
 121 #endif
 122 #endif
 123
 124 /********************************************************/
 125 #if CONFIG_TCC_SEMLOCK
 126 #if defined _WIN32
 127 ST_FUNC void wait_sem(TCCSem *p)
 128 {
 129     if (!p->init)
 130         InitializeCriticalSection(&p->cr), p->init = 1;
 131     EnterCriticalSection(&p->cr);
 132 }
 133 ST_FUNC void post_sem(TCCSem *p)
 134 {
 135     LeaveCriticalSection(&p->cr);
 136 }
 137 #elif defined __APPLE__
 138 /* Half-compatible MacOS doesn't have non-shared (process local)
 139    semaphores.  Use the dispatch framework for lightweight locks.  */
 140 ST_FUNC void wait_sem(TCCSem *p)
 141 {
 142     if (!p->init)
 143         p->sem = dispatch_semaphore_create(1), p->init = 1;
 144     dispatch_semaphore_wait(p->sem, DISPATCH_TIME_FOREVER);
 145 }
 146 ST_FUNC void post_sem(TCCSem *p)
 147 {
 148     dispatch_semaphore_signal(p->sem);
 149 }
 150 #else
 151 ST_FUNC void wait_sem(TCCSem *p)
 152 {
 153     if (!p->init)
 154         sem_init(&p->sem, 0, 1), p->init = 1;
 155     while (sem_wait(&p->sem) < 0 && errno == EINTR);
 156 }
 157 ST_FUNC void post_sem(TCCSem *p)
 158 {
 159     sem_post(&p->sem);
 160 }
 161 #endif
 162 #endif
 163
 164 PUB_FUNC void tcc_enter_state(TCCState *s1)
 165 {
 166     if (s1->error_set_jmp_enabled)
 167         return;
 168     WAIT_SEM(&tcc_compile_sem);
 169     tcc_state = s1;
 170 }
 171
 172 PUB_FUNC void tcc_exit_state(TCCState *s1)
 173 {
 174     if (s1->error_set_jmp_enabled)
 175         return;
 176     tcc_state = NULL;
 177     POST_SEM(&tcc_compile_sem);
 178 }
 179
 180 /********************************************************/
 181 /* copy a string and truncate it. */
 182 ST_FUNC char *pstrcpy(char *buf, size_t buf_size, const char *s)
 183 {
 184     char *q, *q_end;
 185     int c;
 186
 187     if (buf_size > 0) {
 188         q = buf;
 189         q_end = buf + buf_size - 1;
 190         while (q < q_end) {
 191             c = *s++;
 192             if (c == '\0')
 193                 break;
 194             *q++ = c;
 195         }
 196         *q = '\0';
 197     }
 198     return buf;
 199 }
 200
 201 /* strcat and truncate. */
 202 ST_FUNC char *pstrcat(char *buf, size_t buf_size, const char *s)
 203 {
 204     size_t len;
 205     len = strlen(buf);
 206     if (len < buf_size)
 207         pstrcpy(buf + len, buf_size - len, s);
 208     return buf;
 209 }
 210
 211 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 212 {
 213     memcpy(out, in, num);
 214     out[num] = '\0';
 215     return out;
 216 }
 217
 218 /* extract the basename of a file */
 219 PUB_FUNC char *tcc_basename(const char *name)
 220 {
 221     char *p = strchr(name, 0);
 222     while (p > name && !IS_DIRSEP(p[-1]))
 223         --p;
 224     return p;
 225 }
 226
 227 /* extract extension part of a file
 228  *
 229  * (if no extension, return pointer to end-of-string)
 230  */
 231 PUB_FUNC char *tcc_fileextension (const char *name)
 232 {
 233     char *b = tcc_basename(name);
 234     char *e = strrchr(b, '.');
 235     return e ? e : strchr(b, 0);
 236 }
 237
 238 ST_FUNC char *tcc_load_text(int fd)
 239 {
 240     int len = lseek(fd, 0, SEEK_END);
 241     char *buf = load_data(fd, 0, len + 1);
 242     buf[len] = 0;
 243     return buf;
 244 }
 245
 246 /********************************************************/
 247 /* memory management */
 248
 249 #undef free
 250 #undef malloc
 251 #undef realloc
 252
 253 #ifndef MEM_DEBUG
 254
 255 PUB_FUNC void tcc_free(void *ptr)
 256 {
 257     free(ptr);
 258 }
 259
 260 PUB_FUNC void *tcc_malloc(unsigned long size)
 261 {
 262     void *ptr;
 263     ptr = malloc(size);
 264     if (!ptr && size)
 265         _tcc_error("memory full (malloc)");
 266     return ptr;
 267 }
 268
 269 PUB_FUNC void *tcc_mallocz(unsigned long size)
 270 {
 271     void *ptr;
 272     ptr = tcc_malloc(size);
 273     if (size)
 274         memset(ptr, 0, size);
 275     return ptr;
 276 }
 277
 278 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 279 {
 280     void *ptr1;
 281     ptr1 = realloc(ptr, size);
 282     if (!ptr1 && size)
 283         _tcc_error("memory full (realloc)");
 284     return ptr1;
 285 }
 286
 287 PUB_FUNC char *tcc_strdup(const char *str)
 288 {
 289     char *ptr;
 290     ptr = tcc_malloc(strlen(str) + 1);
 291     strcpy(ptr, str);
 292     return ptr;
 293 }
 294
 295 #else
 296
 297 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 298 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 299 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 300 #define MEM_DEBUG_FILE_LEN 40
 301 #define MEM_DEBUG_CHECK3(header) \
 302     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 303 #define MEM_USER_PTR(header) \
 304     ((char *)header + offsetof(mem_debug_header_t, magic3))
 305 #define MEM_HEADER_PTR(ptr) \
 306     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 307
 308 struct mem_debug_header {
 309     unsigned magic1;
 310     unsigned size;
 311     struct mem_debug_header *prev;
 312     struct mem_debug_header *next;
 313     int line_num;
 314     char file_name[MEM_DEBUG_FILE_LEN + 1];
 315     unsigned magic2;
 316     ALIGNED(16) unsigned char magic3[4];
 317 };
 318
 319 typedef struct mem_debug_header mem_debug_header_t;
 320
 321 static mem_debug_header_t *mem_debug_chain;
 322 static unsigned mem_cur_size;
 323 static unsigned mem_max_size;
 324
 325 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 326 {
 327     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 328     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 329         header->magic2 != MEM_DEBUG_MAGIC2 ||
 330         read32le(MEM_DEBUG_CHECK3(header)) != MEM_DEBUG_MAGIC3 ||
 331         header->size == (unsigned)-1) {
 332         fprintf(stderr, "%s check failed\n", msg);
 333         if (header->magic1 == MEM_DEBUG_MAGIC1)
 334             fprintf(stderr, "%s:%u: block allocated here.\n",
 335                 header->file_name, header->line_num);
 336         exit(1);
 337     }
 338     return header;
 339 }
 340
 341 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 342 {
 343     int ofs;
 344     mem_debug_header_t *header;
 345
 346     header = malloc(sizeof(mem_debug_header_t) + size);
 347     if (!header)
 348         _tcc_error("memory full (malloc)");
 349
 350     header->magic1 = MEM_DEBUG_MAGIC1;
 351     header->magic2 = MEM_DEBUG_MAGIC2;
 352     header->size = size;
 353     write32le(MEM_DEBUG_CHECK3(header), MEM_DEBUG_MAGIC3);
 354     header->line_num = line;
 355     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 356     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 357     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 358
 359     header->next = mem_debug_chain;
 360     header->prev = NULL;
 361     if (header->next)
 362         header->next->prev = header;
 363     mem_debug_chain = header;
 364
 365     mem_cur_size += size;
 366     if (mem_cur_size > mem_max_size)
 367         mem_max_size = mem_cur_size;
 368
 369     return MEM_USER_PTR(header);
 370 }
 371
 372 PUB_FUNC void tcc_free_debug(void *ptr)
 373 {
 374     mem_debug_header_t *header;
 375     if (!ptr)
 376         return;
 377     header = malloc_check(ptr, "tcc_free");
 378     mem_cur_size -= header->size;
 379     header->size = (unsigned)-1;
 380     if (header->next)
 381         header->next->prev = header->prev;
 382     if (header->prev)
 383         header->prev->next = header->next;
 384     if (header == mem_debug_chain)
 385         mem_debug_chain = header->next;
 386     free(header);
 387 }
 388
 389 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 390 {
 391     void *ptr;
 392     ptr = tcc_malloc_debug(size,file,line);
 393     memset(ptr, 0, size);
 394     return ptr;
 395 }
 396
 397 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 398 {
 399     mem_debug_header_t *header;
 400     int mem_debug_chain_update = 0;
 401     if (!ptr)
 402         return tcc_malloc_debug(size, file, line);
 403     header = malloc_check(ptr, "tcc_realloc");
 404     mem_cur_size -= header->size;
 405     mem_debug_chain_update = (header == mem_debug_chain);
 406     header = realloc(header, sizeof(mem_debug_header_t) + size);
 407     if (!header)
 408         _tcc_error("memory full (realloc)");
 409     header->size = size;
 410     write32le(MEM_DEBUG_CHECK3(header), MEM_DEBUG_MAGIC3);
 411     if (header->next)
 412         header->next->prev = header;
 413     if (header->prev)
 414         header->prev->next = header;
 415     if (mem_debug_chain_update)
 416         mem_debug_chain = header;
 417     mem_cur_size += size;
 418     if (mem_cur_size > mem_max_size)
 419         mem_max_size = mem_cur_size;
 420     return MEM_USER_PTR(header);
 421 }
 422
 423 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 424 {
 425     char *ptr;
 426     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 427     strcpy(ptr, str);
 428     return ptr;
 429 }
 430
 431 PUB_FUNC void tcc_memcheck(void)
 432 {
 433     if (mem_cur_size) {
 434         mem_debug_header_t *header = mem_debug_chain;
 435         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 436             mem_cur_size, mem_max_size);
 437         while (header) {
 438             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 439                 header->file_name, header->line_num, header->size);
 440             header = header->next;
 441         }
 442 #if MEM_DEBUG-0 == 2
 443         exit(2);
 444 #endif
 445     }
 446 }
 447 #endif /* MEM_DEBUG */
 448
 449 #define free(p) use_tcc_free(p)
 450 #define malloc(s) use_tcc_malloc(s)
 451 #define realloc(p, s) use_tcc_realloc(p, s)
 452
 453 /********************************************************/
 454 /* dynarrays */
 455
 456 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 457 {
 458     int nb, nb_alloc;
 459     void **pp;
 460
 461     nb = *nb_ptr;
 462     pp = *(void ***)ptab;
 463     /* every power of two we double array size */
 464     if ((nb & (nb - 1)) == 0) {
 465         if (!nb)
 466             nb_alloc = 1;
 467         else
 468             nb_alloc = nb * 2;
 469         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 470         *(void***)ptab = pp;
 471     }
 472     pp[nb++] = data;
 473     *nb_ptr = nb;
 474 }
 475
 476 ST_FUNC void dynarray_reset(void *pp, int *n)
 477 {
 478     void **p;
 479     for (p = *(void***)pp; *n; ++p, --*n)
 480         if (*p)
 481             tcc_free(*p);
 482     tcc_free(*(void**)pp);
 483     *(void**)pp = NULL;
 484 }
 485
 486 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 487 {
 488     const char *p;
 489     do {
 490         int c;
 491         CString str;
 492
 493         cstr_new(&str);
 494         for (p = in; c = *p, c != '\0' && c != PATHSEP[0]; ++p) {
 495             if (c == '{' && p[1] && p[2] == '}') {
 496                 c = p[1], p += 2;
 497                 if (c == 'B')
 498                     cstr_cat(&str, s->tcc_lib_path, -1);
 499                 if (c == 'R')
 500                     cstr_cat(&str, CONFIG_SYSROOT, -1);
 501                 if (c == 'f' && file) {
 502                     /* substitute current file's dir */
 503                     const char *f = file->true_filename;
 504                     const char *b = tcc_basename(f);
 505                     if (b > f)
 506                         cstr_cat(&str, f, b - f - 1);
 507                     else
 508                         cstr_cat(&str, ".", 1);
 509                 }
 510             } else {
 511                 cstr_ccat(&str, c);
 512             }
 513         }
 514         if (str.size) {
 515             cstr_ccat(&str, '\0');
 516             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 517         }
 518         cstr_free(&str);
 519         in = p+1;
 520     } while (*p);
 521 }
 522
 523 /********************************************************/
 524 /* warning / error */
 525
 526 /* warn_... option bits */
 527 #define WARN_ON  1 /* warning is on (-Woption) */
 528 #define WARN_ERR 2 /* warning is an error (-Werror=option) */
 529 #define WARN_NOE 4 /* warning is not an error (-Wno-error=option) */
 530
 531 /* error1() modes */
 532 enum { ERROR_WARN, ERROR_NOABORT, ERROR_ERROR };
 533
 534 static void error1(int mode, const char *fmt, va_list ap)
 535 {
 536     BufferedFile **pf, *f;
 537     TCCState *s1 = tcc_state;
 538     CString cs;
 539
 540     cstr_new(&cs);
 541
 542     if (s1 == NULL)
 543         /* can happen only if called from tcc_malloc(): 'out of memory' */
 544         goto no_file;
 545
 546     tcc_exit_state(s1);
 547
 548     if (mode == ERROR_WARN) {
 549         if (s1->warn_error)
 550             mode = ERROR_ERROR;
 551         if (s1->warn_num) {
 552             /* handle tcc_warning_c(warn_option)(fmt, ...) */
 553             int wopt = *(&s1->warn_none + s1->warn_num);
 554             s1->warn_num = 0;
 555             if (0 == (wopt & WARN_ON))
 556                 return;
 557             if (wopt & WARN_ERR)
 558                 mode = ERROR_ERROR;
 559             if (wopt & WARN_NOE)
 560                 mode = ERROR_WARN;
 561         }
 562         if (s1->warn_none)
 563             return;
 564     }
 565
 566     f = NULL;
 567     if (s1->error_set_jmp_enabled) { /* we're called while parsing a file */
 568         /* use upper file if inline ":asm:" or token ":paste:" */
 569         for (f = file; f && f->filename[0] == ':'; f = f->prev)
 570             ;
 571     }
 572     if (f) {
 573         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 574             cstr_printf(&cs, "In file included from %s:%d:\n",
 575                 (*pf)->filename, (*pf)->line_num - 1);
 576         cstr_printf(&cs, "%s:%d: ",
 577             f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 578     } else if (s1->current_filename) {
 579         cstr_printf(&cs, "%s: ", s1->current_filename);
 580     }
 581
 582 no_file:
 583     if (0 == cs.size)
 584         cstr_printf(&cs, "tcc: ");
 585     cstr_printf(&cs, mode == ERROR_WARN ? "warning: " : "error: ");
 586     cstr_vprintf(&cs, fmt, ap);
 587     if (!s1 || !s1->error_func) {
 588         /* default case: stderr */
 589         if (s1 && s1->output_type == TCC_OUTPUT_PREPROCESS && s1->ppfp == stdout)
 590             printf("\n"); /* print a newline during tcc -E */
 591         fflush(stdout); /* flush -v output */
 592         fprintf(stderr, "%s\n", (char*)cs.data);
 593         fflush(stderr); /* print error/warning now (win32) */
 594     } else {
 595         s1->error_func(s1->error_opaque, (char*)cs.data);
 596     }
 597     cstr_free(&cs);
 598     if (s1) {
 599         if (mode != ERROR_WARN)
 600             s1->nb_errors++;
 601         if (mode != ERROR_ERROR)
 602             return;
 603         if (s1->error_set_jmp_enabled)
 604             longjmp(s1->error_jmp_buf, 1);
 605     }
 606     exit(1);
 607 }
 608
 609 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque, TCCErrorFunc error_func)
 610 {
 611     s->error_opaque = error_opaque;
 612     s->error_func = error_func;
 613 }
 614
 615 LIBTCCAPI TCCErrorFunc tcc_get_error_func(TCCState *s)
 616 {
 617     return s->error_func;
 618 }
 619
 620 LIBTCCAPI void *tcc_get_error_opaque(TCCState *s)
 621 {
 622     return s->error_opaque;
 623 }
 624
 625 /* error without aborting current compilation */
 626 PUB_FUNC void _tcc_error_noabort(const char *fmt, ...)
 627 {
 628     va_list ap;
 629     va_start(ap, fmt);
 630     error1(ERROR_NOABORT, fmt, ap);
 631     va_end(ap);
 632 }
 633
 634 PUB_FUNC void _tcc_error(const char *fmt, ...)
 635 {
 636     va_list ap;
 637     va_start(ap, fmt);
 638     for (;;) error1(ERROR_ERROR, fmt, ap);
 639 }
 640
 641 PUB_FUNC void _tcc_warning(const char *fmt, ...)
 642 {
 643     va_list ap;
 644     va_start(ap, fmt);
 645     error1(ERROR_WARN, fmt, ap);
 646     va_end(ap);
 647 }
 648
 649 /********************************************************/
 650 /* I/O layer */
 651
 652 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 653 {
 654     BufferedFile *bf;
 655     int buflen = initlen ? initlen : IO_BUF_SIZE;
 656
 657     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 658     bf->buf_ptr = bf->buffer;
 659     bf->buf_end = bf->buffer + initlen;
 660     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 661     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 662 #ifdef _WIN32
 663     normalize_slashes(bf->filename);
 664 #endif
 665     bf->true_filename = bf->filename;
 666     bf->line_num = 1;
 667     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 668     bf->fd = -1;
 669     bf->prev = file;
 670     file = bf;
 671     tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 672 }
 673
 674 ST_FUNC void tcc_close(void)
 675 {
 676     TCCState *s1 = tcc_state;
 677     BufferedFile *bf = file;
 678     if (bf->fd > 0) {
 679         close(bf->fd);
 680         total_lines += bf->line_num;
 681     }
 682     if (bf->true_filename != bf->filename)
 683         tcc_free(bf->true_filename);
 684     file = bf->prev;
 685     tcc_free(bf);
 686 }
 687
 688 static int _tcc_open(TCCState *s1, const char *filename)
 689 {
 690     int fd;
 691     if (strcmp(filename, "-") == 0)
 692         fd = 0, filename = "<stdin>";
 693     else
 694         fd = open(filename, O_RDONLY | O_BINARY);
 695     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 696         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 697                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 698     return fd;
 699 }
 700
 701 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 702 {
 703     int fd = _tcc_open(s1, filename);
 704     if (fd < 0)
 705         return -1;
 706     tcc_open_bf(s1, filename, 0);
 707     file->fd = fd;
 708     return 0;
 709 }
 710
 711 /* compile the file opened in 'file'. Return non zero if errors. */
 712 static int tcc_compile(TCCState *s1, int filetype, const char *str, int fd)
 713 {
 714     /* Here we enter the code section where we use the global variables for
 715        parsing and code generation (tccpp.c, tccgen.c, <target>-gen.c).
 716        Other threads need to wait until we're done.
 717
 718        Alternatively we could use thread local storage for those global
 719        variables, which may or may not have advantages */
 720
 721     tcc_enter_state(s1);
 722     s1->error_set_jmp_enabled = 1;
 723
 724     if (setjmp(s1->error_jmp_buf) == 0) {
 725         s1->nb_errors = 0;
 726
 727         if (fd == -1) {
 728             int len = strlen(str);
 729             tcc_open_bf(s1, "<string>", len);
 730             memcpy(file->buffer, str, len);
 731         } else {
 732             tcc_open_bf(s1, str, 0);
 733             file->fd = fd;
 734         }
 735
 736         preprocess_start(s1, filetype);
 737         tccgen_init(s1);
 738
 739         if (s1->output_type == TCC_OUTPUT_PREPROCESS) {
 740             tcc_preprocess(s1);
 741         } else {
 742             tccelf_begin_file(s1);
 743             if (filetype & (AFF_TYPE_ASM | AFF_TYPE_ASMPP)) {
 744                 tcc_assemble(s1, !!(filetype & AFF_TYPE_ASMPP));
 745             } else {
 746                 tccgen_compile(s1);
 747             }
 748             tccelf_end_file(s1);
 749         }
 750     }
 751     tccgen_finish(s1);
 752     preprocess_end(s1);
 753     s1->error_set_jmp_enabled = 0;
 754     tcc_exit_state(s1);
 755     return s1->nb_errors != 0 ? -1 : 0;
 756 }
 757
 758 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 759 {
 760     return tcc_compile(s, s->filetype, str, -1);
 761 }
 762
 763 /* define a preprocessor symbol. value can be NULL, sym can be "sym=val" */
 764 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 765 {
 766     const char *eq;
 767     if (NULL == (eq = strchr(sym, '=')))
 768         eq = strchr(sym, 0);
 769     if (NULL == value)
 770         value = *eq ? eq + 1 : "1";
 771     cstr_printf(&s1->cmdline_defs, "#define %.*s %s\n", (int)(eq-sym), sym, value);
 772 }
 773
 774 /* undefine a preprocessor symbol */
 775 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 776 {
 777     cstr_printf(&s1->cmdline_defs, "#undef %s\n", sym);
 778 }
 779
 780
 781 LIBTCCAPI TCCState *tcc_new(void)
 782 {
 783     TCCState *s;
 784
 785     s = tcc_mallocz(sizeof(TCCState));
 786     if (!s)
 787         return NULL;
 788 #ifdef MEM_DEBUG
 789     ++nb_states;
 790 #endif
 791
 792 #undef gnu_ext
 793
 794     s->gnu_ext = 1;
 795     s->tcc_ext = 1;
 796     s->nocommon = 1;
 797     s->dollars_in_identifiers = 1; /*on by default like in gcc/clang*/
 798     s->cversion = 199901; /* default unless -std=c11 is supplied */
 799     s->warn_implicit_function_declaration = 1;
 800     s->warn_discarded_qualifiers = 1;
 801     s->ms_extensions = 1;
 802
 803 #ifdef CHAR_IS_UNSIGNED
 804     s->char_is_unsigned = 1;
 805 #endif
 806 #ifdef TCC_TARGET_I386
 807     s->seg_size = 32;
 808 #endif
 809     /* enable this if you want symbols with leading underscore on windows: */
 810 #if defined TCC_TARGET_MACHO /* || defined TCC_TARGET_PE */
 811     s->leading_underscore = 1;
 812 #endif
 813 #ifdef TCC_TARGET_ARM
 814     s->float_abi = ARM_FLOAT_ABI;
 815 #endif
 816 #ifdef CONFIG_NEW_DTAGS
 817     s->enable_new_dtags = 1;
 818 #endif
 819     s->ppfp = stdout;
 820     /* might be used in error() before preprocess_start() */
 821     s->include_stack_ptr = s->include_stack;
 822
 823     tcc_set_lib_path(s, CONFIG_TCCDIR);
 824     return s;
 825 }
 826
 827 LIBTCCAPI void tcc_delete(TCCState *s1)
 828 {
 829     /* free sections */
 830     tccelf_delete(s1);
 831
 832     /* free library paths */
 833     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 834     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 835
 836     /* free include paths */
 837     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 838     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 839
 840     tcc_free(s1->tcc_lib_path);
 841     tcc_free(s1->soname);
 842     tcc_free(s1->rpath);
 843     tcc_free(s1->elf_entryname);
 844     tcc_free(s1->init_symbol);
 845     tcc_free(s1->fini_symbol);
 846     tcc_free(s1->mapfile);
 847     tcc_free(s1->outfile);
 848     tcc_free(s1->deps_outfile);
 849 #if defined TCC_TARGET_MACHO
 850     tcc_free(s1->install_name);
 851 #endif
 852     dynarray_reset(&s1->files, &s1->nb_files);
 853     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 854     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 855     dynarray_reset(&s1->argv, &s1->argc);
 856     cstr_free(&s1->cmdline_defs);
 857     cstr_free(&s1->cmdline_incl);
 858 #ifdef TCC_IS_NATIVE
 859     /* free runtime memory */
 860     tcc_run_free(s1);
 861 #endif
 862     tcc_free(s1->dState);
 863     tcc_free(s1);
 864 #ifdef MEM_DEBUG
 865     if (0 == --nb_states)
 866         tcc_memcheck();
 867 #endif
 868 }
 869
 870 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 871 {
 872 #ifdef CONFIG_TCC_PIE
 873     if (output_type == TCC_OUTPUT_EXE)
 874         output_type |= TCC_OUTPUT_DYN;
 875 #endif
 876     s->output_type = output_type;
 877
 878     if (!s->nostdinc) {
 879         /* default include paths */
 880         /* -isystem paths have already been handled */
 881         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 882     }
 883
 884     if (output_type == TCC_OUTPUT_PREPROCESS) {
 885         s->do_debug = 0;
 886         return 0;
 887     }
 888
 889     tccelf_new(s);
 890     if (s->do_debug) {
 891         /* add debug sections */
 892         tcc_debug_new(s);
 893     }
 894 #ifdef CONFIG_TCC_BCHECK
 895     if (s->do_bounds_check) {
 896         /* if bound checking, then add corresponding sections */
 897         tccelf_bounds_new(s);
 898     }
 899 #endif
 900
 901     if (output_type == TCC_OUTPUT_OBJ) {
 902         /* always elf for objects */
 903         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 904         return 0;
 905     }
 906
 907     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 908
 909 #ifdef TCC_TARGET_PE
 910 # ifdef _WIN32
 911     /* allow linking with system dll's directly */
 912     tcc_add_systemdir(s);
 913 # endif
 914     /* target PE has its own startup code in libtcc1.a */
 915     return 0;
 916
 917 #elif defined TCC_TARGET_MACHO
 918 # ifdef TCC_IS_NATIVE
 919     tcc_add_macos_sdkpath(s);
 920 # endif
 921     /* Mach-O with LC_MAIN doesn't need any crt startup code.  */
 922     return 0;
 923
 924 #else
 925     /* paths for crt objects */
 926     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 927
 928     /* add libc crt1/crti objects */
 929     if (output_type != TCC_OUTPUT_MEMORY && !s->nostdlib) {
 930 #if TARGETOS_OpenBSD
 931         if (output_type != TCC_OUTPUT_DLL)
 932             tcc_add_crt(s, "crt0.o");
 933         if (output_type == TCC_OUTPUT_DLL)
 934             tcc_add_crt(s, "crtbeginS.o");
 935         else
 936             tcc_add_crt(s, "crtbegin.o");
 937 #elif TARGETOS_FreeBSD
 938         if (output_type != TCC_OUTPUT_DLL)
 939             tcc_add_crt(s, "crt1.o");
 940         tcc_add_crt(s, "crti.o");
 941         if (s->static_link)
 942             tcc_add_crt(s, "crtbeginT.o");
 943         else if (output_type & TCC_OUTPUT_DYN)
 944             tcc_add_crt(s, "crtbeginS.o");
 945         else
 946             tcc_add_crt(s, "crtbegin.o");
 947 #elif TARGETOS_NetBSD
 948         if (output_type != TCC_OUTPUT_DLL)
 949             tcc_add_crt(s, "crt0.o");
 950         tcc_add_crt(s, "crti.o");
 951         if (s->static_link)
 952             tcc_add_crt(s, "crtbeginT.o");
 953         else if (output_type & TCC_OUTPUT_DYN)
 954             tcc_add_crt(s, "crtbeginS.o");
 955         else
 956             tcc_add_crt(s, "crtbegin.o");
 957 #elif defined TARGETOS_ANDROID
 958         if (output_type != TCC_OUTPUT_DLL)
 959             tcc_add_crt(s, "crtbegin_dynamic.o");
 960         else
 961             tcc_add_crt(s, "crtbegin_so.o");
 962 #else
 963         if (output_type != TCC_OUTPUT_DLL)
 964             tcc_add_crt(s, "crt1.o");
 965         tcc_add_crt(s, "crti.o");
 966 #endif
 967     }
 968     return 0;
 969 #endif
 970 }
 971
 972 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 973 {
 974     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
 975     return 0;
 976 }
 977
 978 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
 979 {
 980     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
 981     return 0;
 982 }
 983
 984 /* add/update a 'DLLReference', Just find if level == -1  */
 985 ST_FUNC DLLReference *tcc_add_dllref(TCCState *s1, const char *dllname, int level)
 986 {
 987     DLLReference *ref = NULL;
 988     int i;
 989     for (i = 0; i < s1->nb_loaded_dlls; i++)
 990         if (0 == strcmp(s1->loaded_dlls[i]->name, dllname)) {
 991             ref = s1->loaded_dlls[i];
 992             break;
 993         }
 994     if (level == -1)
 995         return ref;
 996     if (ref) {
 997         if (level < ref->level)
 998             ref->level = level;
 999         ref->found = 1;
1000         return ref;
1001     }
1002     ref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
1003     strcpy(ref->name, dllname);
1004     dynarray_add(&s1->loaded_dlls, &s1->nb_loaded_dlls, ref);
1005     ref->level = level;
1006     ref->index = s1->nb_loaded_dlls;
1007     return ref;
1008 }
1009
1010 /* OpenBSD: choose latest from libxxx.so.x.y versions */
1011 #if defined TARGETOS_OpenBSD && !defined _WIN32
1012 #include <glob.h>
1013 static int tcc_glob_so(TCCState *s1, const char *pattern, char *buf, int size)
1014 {
1015     const char *star;
1016     glob_t g;
1017     char *p;
1018     int i, v, v1, v2, v3;
1019
1020     star = strchr(pattern, '*');
1021     if (!star || glob(pattern, 0, NULL, &g))
1022         return -1;
1023     for (v = -1, i = 0; i < g.gl_pathc; ++i) {
1024         p = g.gl_pathv[i];
1025         if (2 != sscanf(p + (star - pattern), "%d.%d.%d", &v1, &v2, &v3))
1026             continue;
1027         if ((v1 = v1 * 1000 + v2) > v)
1028             v = v1, pstrcpy(buf, size, p);
1029     }
1030     globfree(&g);
1031     return v;
1032 }
1033 #endif
1034
1035 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1036 {
1037     int fd, ret = -1;
1038
1039 #if defined TARGETOS_OpenBSD && !defined _WIN32
1040     char buf[1024];
1041     if (tcc_glob_so(s1, filename, buf, sizeof buf) >= 0)
1042         filename = buf;
1043 #endif
1044
1045     /* ignore binary files with -E */
1046     if (s1->output_type == TCC_OUTPUT_PREPROCESS
1047         && (flags & AFF_TYPE_BIN))
1048         return 0;
1049
1050     /* open the file */
1051     fd = _tcc_open(s1, filename);
1052     if (fd < 0) {
1053         if (flags & AFF_PRINT_ERROR)
1054             tcc_error_noabort("file '%s' not found", filename);
1055         return ret;
1056     }
1057
1058     s1->current_filename = filename;
1059     if (flags & AFF_TYPE_BIN) {
1060         ElfW(Ehdr) ehdr;
1061         int obj_type;
1062
1063         obj_type = tcc_object_type(fd, &ehdr);
1064         lseek(fd, 0, SEEK_SET);
1065
1066         switch (obj_type) {
1067
1068         case AFF_BINTYPE_REL:
1069             ret = tcc_load_object_file(s1, fd, 0);
1070             break;
1071
1072         case AFF_BINTYPE_AR:
1073             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1074             break;
1075
1076 #ifdef TCC_TARGET_PE
1077         default:
1078             ret = pe_load_file(s1, fd, filename);
1079             goto check_success;
1080
1081 #elif defined TCC_TARGET_MACHO
1082         case AFF_BINTYPE_DYN:
1083         case_dyn_or_tbd:
1084             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1085 #ifdef TCC_IS_NATIVE
1086                 void* dl;
1087                 const char* soname = filename;
1088                 if (obj_type != AFF_BINTYPE_DYN)
1089                     soname = macho_tbd_soname(filename);
1090                 dl = dlopen(soname, RTLD_GLOBAL | RTLD_LAZY);
1091                 if (dl)
1092                     tcc_add_dllref(s1, soname, 0)->handle = dl, ret = 0;
1093                 if (filename != soname)
1094                     tcc_free((void *)soname);
1095 #endif
1096             } else if (obj_type == AFF_BINTYPE_DYN) {
1097                 ret = macho_load_dll(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1098             } else {
1099                 ret = macho_load_tbd(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1100             }
1101             break;
1102         default:
1103         {
1104             const char *ext = tcc_fileextension(filename);
1105             if (!strcmp(ext, ".tbd"))
1106                 goto case_dyn_or_tbd;
1107             if (!strcmp(ext, ".dylib")) {
1108                 obj_type = AFF_BINTYPE_DYN;
1109                 goto case_dyn_or_tbd;
1110             }
1111             goto check_success;
1112         }
1113
1114 #else /* unix */
1115         case AFF_BINTYPE_DYN:
1116             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1117 #ifdef TCC_IS_NATIVE
1118                 void* dl = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1119                 if (dl)
1120                     tcc_add_dllref(s1, filename, 0)->handle = dl, ret = 0;
1121 #endif
1122             } else
1123                 ret = tcc_load_dll(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1124             break;
1125
1126         default:
1127             /* as GNU ld, consider it is an ld script if not recognized */
1128             ret = tcc_load_ldscript(s1, fd);
1129             goto check_success;
1130
1131 #endif /* pe / macos / unix */
1132
1133 check_success:
1134             if (ret < 0)
1135                 tcc_error_noabort("%s: unrecognized file type", filename);
1136             break;
1137
1138 #ifdef TCC_TARGET_COFF
1139         case AFF_BINTYPE_C67:
1140             ret = tcc_load_coff(s1, fd);
1141             break;
1142 #endif
1143         }
1144         close(fd);
1145     } else {
1146         /* update target deps */
1147         dynarray_add(&s1->target_deps, &s1->nb_target_deps, tcc_strdup(filename));
1148         ret = tcc_compile(s1, flags, filename, fd);
1149     }
1150     s1->current_filename = NULL;
1151     return ret;
1152 }
1153
1154 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1155 {
1156     int filetype = s->filetype;
1157     if (0 == (filetype & AFF_TYPE_MASK)) {
1158         /* use a file extension to detect a filetype */
1159         const char *ext = tcc_fileextension(filename);
1160         if (ext[0]) {
1161             ext++;
1162             if (!strcmp(ext, "S"))
1163                 filetype = AFF_TYPE_ASMPP;
1164             else if (!strcmp(ext, "s"))
1165                 filetype = AFF_TYPE_ASM;
1166             else if (!PATHCMP(ext, "c")
1167                      || !PATHCMP(ext, "h")
1168                      || !PATHCMP(ext, "i"))
1169                 filetype = AFF_TYPE_C;
1170             else
1171                 filetype |= AFF_TYPE_BIN;
1172         } else {
1173             filetype = AFF_TYPE_C;
1174         }
1175     }
1176     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1177 }
1178
1179 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1180 {
1181     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1182     return 0;
1183 }
1184
1185 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1186     const char *filename, int flags, char **paths, int nb_paths)
1187 {
1188     char buf[1024];
1189     int i;
1190
1191     for(i = 0; i < nb_paths; i++) {
1192         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1193         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1194             return 0;
1195     }
1196     return -1;
1197 }
1198
1199 /* find and load a dll. Return non zero if not found */
1200 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1201 {
1202     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1203         s->library_paths, s->nb_library_paths);
1204 }
1205
1206 /* find [cross-]libtcc1.a and tcc helper objects in library path */
1207 ST_FUNC void tcc_add_support(TCCState *s1, const char *filename)
1208 {
1209     char buf[100];
1210     if (CONFIG_TCC_CROSSPREFIX[0])
1211         filename = strcat(strcpy(buf, CONFIG_TCC_CROSSPREFIX), filename);
1212     if (tcc_add_dll(s1, filename, 0) < 0)
1213         tcc_error_noabort("%s not found", filename);
1214 }
1215
1216 #if !defined TCC_TARGET_PE && !defined TCC_TARGET_MACHO
1217 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)
1218 {
1219     if (-1 == tcc_add_library_internal(s1, "%s/%s",
1220         filename, 0, s1->crt_paths, s1->nb_crt_paths))
1221         tcc_error_noabort("file '%s' not found", filename);
1222     return 0;
1223 }
1224 #endif
1225
1226 /* the library name is the same as the argument of the '-l' option */
1227 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1228 {
1229 #if defined TCC_TARGET_PE
1230     static const char * const libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1231     const char * const *pp = s->static_link ? libs + 4 : libs;
1232 #elif defined TCC_TARGET_MACHO
1233     static const char * const libs[] = { "%s/lib%s.dylib", "%s/lib%s.tbd", "%s/lib%s.a", NULL };
1234     const char * const *pp = s->static_link ? libs + 2 : libs;
1235 #elif defined TARGETOS_OpenBSD
1236     static const char * const libs[] = { "%s/lib%s.so.*", "%s/lib%s.a", NULL };
1237     const char * const *pp = s->static_link ? libs + 1 : libs;
1238 #else
1239     static const char * const libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1240     const char * const *pp = s->static_link ? libs + 1 : libs;
1241 #endif
1242     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1243     while (*pp) {
1244         if (0 == tcc_add_library_internal(s, *pp,
1245             libraryname, flags, s->library_paths, s->nb_library_paths))
1246             return 0;
1247         ++pp;
1248     }
1249     return -1;
1250 }
1251
1252 PUB_FUNC int tcc_add_library_err(TCCState *s1, const char *libname)
1253 {
1254     int ret = tcc_add_library(s1, libname);
1255     if (ret < 0)
1256         tcc_error_noabort("library '%s' not found", libname);
1257     return ret;
1258 }
1259
1260 /* handle #pragma comment(lib,) */
1261 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1262 {
1263     int i;
1264     for (i = 0; i < s1->nb_pragma_libs; i++)
1265         tcc_add_library_err(s1, s1->pragma_libs[i]);
1266 }
1267
1268 LIBTCCAPI int tcc_add_symbol(TCCState *s1, const char *name, const void *val)
1269 {
1270 #ifdef TCC_TARGET_PE
1271     /* On x86_64 'val' might not be reachable with a 32bit offset.
1272        So it is handled here as if it were in a DLL. */
1273     pe_putimport(s1, 0, name, (uintptr_t)val);
1274 #else
1275     char buf[256];
1276     if (s1->leading_underscore) {
1277         buf[0] = '_';
1278         pstrcpy(buf + 1, sizeof(buf) - 1, name);
1279         name = buf;
1280     }
1281     set_global_sym(s1, name, NULL, (addr_t)(uintptr_t)val); /* NULL: SHN_ABS */
1282 #endif
1283     return 0;
1284 }
1285
1286 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1287 {
1288     tcc_free(s->tcc_lib_path);
1289     s->tcc_lib_path = tcc_strdup(path);
1290 }
1291
1292 /********************************************************/
1293 /* options parser */
1294
1295 static int strstart(const char *val, const char **str)
1296 {
1297     const char *p, *q;
1298     p = *str;
1299     q = val;
1300     while (*q) {
1301         if (*p != *q)
1302             return 0;
1303         p++;
1304         q++;
1305     }
1306     *str = p;
1307     return 1;
1308 }
1309
1310 /* Like strstart, but automatically takes into account that ld options can
1311  *
1312  * - start with double or single dash (e.g. '--soname' or '-soname')
1313  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1314  *   or '-Wl,-soname=x.so')
1315  *
1316  * you provide `val` always in 'option[=]' form (no leading -)
1317  */
1318 static int link_option(const char *str, const char *val, const char **ptr)
1319 {
1320     const char *p, *q;
1321     int ret;
1322
1323     /* there should be 1 or 2 dashes */
1324     if (*str++ != '-')
1325         return 0;
1326     if (*str == '-')
1327         str++;
1328
1329     /* then str & val should match (potentially up to '=') */
1330     p = str;
1331     q = val;
1332
1333     ret = 1;
1334     if (q[0] == '?') {
1335         ++q;
1336         if (strstart("no-", &p))
1337             ret = -1;
1338     }
1339
1340     while (*q != '\0' && *q != '=') {
1341         if (*p != *q)
1342             return 0;
1343         p++;
1344         q++;
1345     }
1346
1347     /* '=' near eos means ',' or '=' is ok */
1348     if (*q == '=') {
1349         if (*p == 0)
1350             *ptr = p;
1351         if (*p != ',' && *p != '=')
1352             return 0;
1353         p++;
1354     } else if (*p) {
1355         return 0;
1356     }
1357     *ptr = p;
1358     return ret;
1359 }
1360
1361 static const char *skip_linker_arg(const char **str)
1362 {
1363     const char *s1 = *str;
1364     const char *s2 = strchr(s1, ',');
1365     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1366     return s2;
1367 }
1368
1369 static void copy_linker_arg(char **pp, const char *s, int sep)
1370 {
1371     const char *q = s;
1372     char *p = *pp;
1373     int l = 0;
1374     if (p && sep)
1375         p[l = strlen(p)] = sep, ++l;
1376     skip_linker_arg(&q);
1377     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1378 }
1379
1380 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1381 {
1382     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1383     f->type = filetype;
1384     strcpy(f->name, filename);
1385     dynarray_add(&s->files, &s->nb_files, f);
1386 }
1387
1388 /* set linker options */
1389 static int tcc_set_linker(TCCState *s, const char *option)
1390 {
1391     TCCState *s1 = s;
1392     while (*option) {
1393
1394         const char *p = NULL;
1395         char *end = NULL;
1396         int ignoring = 0;
1397         int ret;
1398
1399         if (link_option(option, "Bsymbolic", &p)) {
1400             s->symbolic = 1;
1401         } else if (link_option(option, "nostdlib", &p)) {
1402             s->nostdlib = 1;
1403         } else if (link_option(option, "e=", &p)
1404                ||  link_option(option, "entry=", &p)) {
1405             copy_linker_arg(&s->elf_entryname, p, 0);
1406         } else if (link_option(option, "fini=", &p)) {
1407             copy_linker_arg(&s->fini_symbol, p, 0);
1408             ignoring = 1;
1409         } else if (link_option(option, "image-base=", &p)
1410                 || link_option(option, "Ttext=", &p)) {
1411             s->text_addr = strtoull(p, &end, 16);
1412             s->has_text_addr = 1;
1413         } else if (link_option(option, "init=", &p)) {
1414             copy_linker_arg(&s->init_symbol, p, 0);
1415             ignoring = 1;
1416         } else if (link_option(option, "Map=", &p)) {
1417             copy_linker_arg(&s->mapfile, p, 0);
1418             ignoring = 1;
1419         } else if (link_option(option, "oformat=", &p)) {
1420 #if defined(TCC_TARGET_PE)
1421             if (strstart("pe-", &p)) {
1422 #elif PTR_SIZE == 8
1423             if (strstart("elf64-", &p)) {
1424 #else
1425             if (strstart("elf32-", &p)) {
1426 #endif
1427                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1428             } else if (!strcmp(p, "binary")) {
1429                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1430 #ifdef TCC_TARGET_COFF
1431             } else if (!strcmp(p, "coff")) {
1432                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1433 #endif
1434             } else
1435                 goto err;
1436
1437         } else if (link_option(option, "as-needed", &p)) {
1438             ignoring = 1;
1439         } else if (link_option(option, "O", &p)) {
1440             ignoring = 1;
1441         } else if (link_option(option, "export-all-symbols", &p)) {
1442             s->rdynamic = 1;
1443         } else if (link_option(option, "export-dynamic", &p)) {
1444             s->rdynamic = 1;
1445         } else if (link_option(option, "rpath=", &p)) {
1446             copy_linker_arg(&s->rpath, p, ':');
1447         } else if (link_option(option, "enable-new-dtags", &p)) {
1448             s->enable_new_dtags = 1;
1449         } else if (link_option(option, "section-alignment=", &p)) {
1450             s->section_align = strtoul(p, &end, 16);
1451         } else if (link_option(option, "soname=", &p)) {
1452             copy_linker_arg(&s->soname, p, 0);
1453 #ifdef TCC_TARGET_PE
1454         } else if (link_option(option, "large-address-aware", &p)) {
1455             s->pe_characteristics |= 0x20;
1456         } else if (link_option(option, "file-alignment=", &p)) {
1457             s->pe_file_align = strtoul(p, &end, 16);
1458         } else if (link_option(option, "stack=", &p)) {
1459             s->pe_stack_size = strtoul(p, &end, 10);
1460         } else if (link_option(option, "subsystem=", &p)) {
1461 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1462             if (!strcmp(p, "native")) {
1463                 s->pe_subsystem = 1;
1464             } else if (!strcmp(p, "console")) {
1465                 s->pe_subsystem = 3;
1466             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1467                 s->pe_subsystem = 2;
1468             } else if (!strcmp(p, "posix")) {
1469                 s->pe_subsystem = 7;
1470             } else if (!strcmp(p, "efiapp")) {
1471                 s->pe_subsystem = 10;
1472             } else if (!strcmp(p, "efiboot")) {
1473                 s->pe_subsystem = 11;
1474             } else if (!strcmp(p, "efiruntime")) {
1475                 s->pe_subsystem = 12;
1476             } else if (!strcmp(p, "efirom")) {
1477                 s->pe_subsystem = 13;
1478 #elif defined(TCC_TARGET_ARM)
1479             if (!strcmp(p, "wince")) {
1480                 s->pe_subsystem = 9;
1481 #endif
1482             } else
1483                 goto err;
1484 #endif
1485 #ifdef TCC_TARGET_MACHO
1486         } else if (link_option(option, "all_load", &p)) {
1487             s->filetype |= AFF_WHOLE_ARCHIVE;
1488         } else if (link_option(option, "force_load", &p)) {
1489             s->filetype |= AFF_WHOLE_ARCHIVE;
1490             args_parser_add_file(s, p, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1491             s->nb_libraries++;
1492         } else if (link_option(option, "single_module", &p)) {
1493             ignoring = 1;
1494 #endif
1495         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1496             if (ret > 0)
1497                 s->filetype |= AFF_WHOLE_ARCHIVE;
1498             else
1499                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1500         } else if (link_option(option, "z=", &p)) {
1501             ignoring = 1;
1502         } else if (p) {
1503             return 0;
1504         } else {
1505     err:
1506             tcc_error("unsupported linker option '%s'", option);
1507         }
1508         if (ignoring)
1509             tcc_warning_c(warn_unsupported)("unsupported linker option '%s'", option);
1510         option = skip_linker_arg(&p);
1511     }
1512     return 1;
1513 }
1514
1515 typedef struct TCCOption {
1516     const char *name;
1517     uint16_t index;
1518     uint16_t flags;
1519 } TCCOption;
1520
1521 enum {
1522     TCC_OPTION_ignored = 0,
1523     TCC_OPTION_HELP,
1524     TCC_OPTION_HELP2,
1525     TCC_OPTION_v,
1526     TCC_OPTION_I,
1527     TCC_OPTION_D,
1528     TCC_OPTION_U,
1529     TCC_OPTION_P,
1530     TCC_OPTION_L,
1531     TCC_OPTION_B,
1532     TCC_OPTION_l,
1533     TCC_OPTION_bench,
1534     TCC_OPTION_bt,
1535     TCC_OPTION_b,
1536     TCC_OPTION_ba,
1537     TCC_OPTION_g,
1538     TCC_OPTION_c,
1539     TCC_OPTION_dumpversion,
1540     TCC_OPTION_d,
1541     TCC_OPTION_static,
1542     TCC_OPTION_std,
1543     TCC_OPTION_shared,
1544     TCC_OPTION_soname,
1545     TCC_OPTION_o,
1546     TCC_OPTION_r,
1547     TCC_OPTION_Wl,
1548     TCC_OPTION_Wp,
1549     TCC_OPTION_W,
1550     TCC_OPTION_O,
1551     TCC_OPTION_mfloat_abi,
1552     TCC_OPTION_m,
1553     TCC_OPTION_f,
1554     TCC_OPTION_isystem,
1555     TCC_OPTION_iwithprefix,
1556     TCC_OPTION_include,
1557     TCC_OPTION_nostdinc,
1558     TCC_OPTION_nostdlib,
1559     TCC_OPTION_print_search_dirs,
1560     TCC_OPTION_rdynamic,
1561     TCC_OPTION_pthread,
1562     TCC_OPTION_run,
1563     TCC_OPTION_w,
1564     TCC_OPTION_E,
1565     TCC_OPTION_M,
1566     TCC_OPTION_MD,
1567     TCC_OPTION_MF,
1568     TCC_OPTION_MM,
1569     TCC_OPTION_MMD,
1570     TCC_OPTION_x,
1571     TCC_OPTION_ar,
1572     TCC_OPTION_impdef,
1573     TCC_OPTION_dynamiclib,
1574     TCC_OPTION_flat_namespace,
1575     TCC_OPTION_two_levelnamespace,
1576     TCC_OPTION_undefined,
1577     TCC_OPTION_install_name,
1578     TCC_OPTION_compatibility_version ,
1579     TCC_OPTION_current_version,
1580 };
1581
1582 #define TCC_OPTION_HAS_ARG 0x0001
1583 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1584
1585 static const TCCOption tcc_options[] = {
1586     { "h", TCC_OPTION_HELP, 0 },
1587     { "-help", TCC_OPTION_HELP, 0 },
1588     { "?", TCC_OPTION_HELP, 0 },
1589     { "hh", TCC_OPTION_HELP2, 0 },
1590     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1591     { "-version", TCC_OPTION_v, 0 }, /* handle as verbose, also prints version*/
1592     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1593     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1594     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1595     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1596     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1597     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1598     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1599     { "bench", TCC_OPTION_bench, 0 },
1600 #ifdef CONFIG_TCC_BACKTRACE
1601     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1602 #endif
1603 #ifdef CONFIG_TCC_BCHECK
1604     { "b", TCC_OPTION_b, 0 },
1605 #endif
1606     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1607 #ifdef TCC_TARGET_MACHO
1608     { "compatibility_version", TCC_OPTION_compatibility_version, TCC_OPTION_HAS_ARG },
1609     { "current_version", TCC_OPTION_current_version, TCC_OPTION_HAS_ARG },
1610 #endif
1611     { "c", TCC_OPTION_c, 0 },
1612 #ifdef TCC_TARGET_MACHO
1613     { "dynamiclib", TCC_OPTION_dynamiclib, 0 },
1614 #endif
1615     { "dumpversion", TCC_OPTION_dumpversion, 0},
1616     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1617     { "static", TCC_OPTION_static, 0 },
1618     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1619     { "shared", TCC_OPTION_shared, 0 },
1620     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1621     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1622     { "pthread", TCC_OPTION_pthread, 0},
1623     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1624     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1625     { "r", TCC_OPTION_r, 0 },
1626     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1627     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1628     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1629     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1630 #ifdef TCC_TARGET_ARM
1631     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1632 #endif
1633     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1634 #ifdef TCC_TARGET_MACHO
1635     { "flat_namespace", TCC_OPTION_flat_namespace, 0 },
1636 #endif
1637     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1638     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1639     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1640     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1641     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1642     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1643     { "w", TCC_OPTION_w, 0 },
1644     { "E", TCC_OPTION_E, 0},
1645     { "M", TCC_OPTION_M, 0},
1646     { "MD", TCC_OPTION_MD, 0},
1647     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1648     { "MM", TCC_OPTION_MM, 0},
1649     { "MMD", TCC_OPTION_MMD, 0},
1650     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1651     { "ar", TCC_OPTION_ar, 0},
1652 #ifdef TCC_TARGET_PE
1653     { "impdef", TCC_OPTION_impdef, 0},
1654 #endif
1655 #ifdef TCC_TARGET_MACHO
1656     { "install_name", TCC_OPTION_install_name, TCC_OPTION_HAS_ARG },
1657     { "two_levelnamespace", TCC_OPTION_two_levelnamespace, 0 },
1658     { "undefined", TCC_OPTION_undefined, TCC_OPTION_HAS_ARG },
1659 #endif
1660     /* ignored (silently, except after -Wunsupported) */
1661     { "arch", 0, TCC_OPTION_HAS_ARG},
1662     { "C", 0, 0 },
1663     { "-param", 0, TCC_OPTION_HAS_ARG },
1664     { "pedantic", 0, 0 },
1665     { "pipe", 0, 0 },
1666     { "s", 0, 0 },
1667     { "traditional", 0, 0 },
1668     { NULL, 0, 0 },
1669 };
1670
1671 typedef struct FlagDef {
1672     uint16_t offset;
1673     uint16_t flags;
1674     const char *name;
1675 } FlagDef;
1676
1677 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1678 #define FD_INVERT 0x0002 /* invert value before storing */
1679
1680 static const FlagDef options_W[] = {
1681     { offsetof(TCCState, warn_all), WD_ALL, "all" },
1682     { offsetof(TCCState, warn_error), 0, "error" },
1683     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1684     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1685     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL, "implicit-function-declaration" },
1686     { offsetof(TCCState, warn_discarded_qualifiers), WD_ALL, "discarded-qualifiers" },
1687     { 0, 0, NULL }
1688 };
1689
1690 static const FlagDef options_f[] = {
1691     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1692     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1693     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1694     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1695     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1696     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1697     { offsetof(TCCState, test_coverage), 0, "test-coverage" },
1698     { 0, 0, NULL }
1699 };
1700
1701 static const FlagDef options_m[] = {
1702     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1703 #ifdef TCC_TARGET_X86_64
1704     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1705 #endif
1706     { 0, 0, NULL }
1707 };
1708
1709 static int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1710 {
1711     int value, mask, ret;
1712     const FlagDef *p;
1713     const char *r;
1714     unsigned char *f;
1715
1716     r = name, value = !strstart("no-", &r), mask = 0;
1717
1718     /* when called with options_W, look for -W[no-]error=<option> */
1719     if ((flags->flags & WD_ALL) && strstart("error=", &r))
1720         value = value ? WARN_ON|WARN_ERR : WARN_NOE, mask = WARN_ON;
1721
1722     for (ret = -1, p = flags; p->name; ++p) {
1723         if (ret) {
1724             if (strcmp(r, p->name))
1725                 continue;
1726         } else {
1727             if (0 == (p->flags & WD_ALL))
1728                 continue;
1729         }
1730
1731         f = (unsigned char *)s + p->offset;
1732         *f = (*f & mask) | (value ^ !!(p->flags & FD_INVERT));
1733
1734         if (ret) {
1735             ret = 0;
1736             if (strcmp(r, "all"))
1737                 break;
1738         }
1739     }
1740     return ret;
1741 }
1742
1743 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1744 {
1745     int ret = 0, q, c;
1746     CString str;
1747     for(;;) {
1748         while (c = (unsigned char)*r, c && c <= ' ')
1749           ++r;
1750         if (c == 0)
1751             break;
1752         q = 0;
1753         cstr_new(&str);
1754         while (c = (unsigned char)*r, c) {
1755             ++r;
1756             if (c == '\\' && (*r == '"' || *r == '\\')) {
1757                 c = *r++;
1758             } else if (c == '"') {
1759                 q = !q;
1760                 continue;
1761             } else if (q == 0 && c <= ' ') {
1762                 break;
1763             }
1764             cstr_ccat(&str, c);
1765         }
1766         cstr_ccat(&str, 0);
1767         //printf("<%s>\n", str.data), fflush(stdout);
1768         dynarray_add(argv, argc, tcc_strdup(str.data));
1769         cstr_free(&str);
1770         ++ret;
1771     }
1772     return ret;
1773 }
1774
1775 /* read list file */
1776 static void args_parser_listfile(TCCState *s,
1777     const char *filename, int optind, int *pargc, char ***pargv)
1778 {
1779     TCCState *s1 = s;
1780     int fd, i;
1781     char *p;
1782     int argc = 0;
1783     char **argv = NULL;
1784
1785     fd = open(filename, O_RDONLY | O_BINARY);
1786     if (fd < 0)
1787         tcc_error("listfile '%s' not found", filename);
1788
1789     p = tcc_load_text(fd);
1790     for (i = 0; i < *pargc; ++i)
1791         if (i == optind)
1792             args_parser_make_argv(p, &argc, &argv);
1793         else
1794             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1795
1796     tcc_free(p);
1797     dynarray_reset(&s->argv, &s->argc);
1798     *pargc = s->argc = argc, *pargv = s->argv = argv;
1799 }
1800
1801 #if defined TCC_TARGET_MACHO
1802 static uint32_t parse_version(TCCState *s1, const char *version)
1803 {
1804     uint32_t a = 0;
1805     uint32_t b = 0;
1806     uint32_t c = 0;
1807     char* last;
1808
1809     a = strtoul(version, &last, 10);
1810     if (*last == '.') {
1811         b = strtoul(&last[1], &last, 10);
1812         if (*last == '.')
1813              c = strtoul(&last[1], &last, 10);
1814     }
1815     if (*last || a > 0xffff || b > 0xff || c > 0xff)
1816         tcc_error("version a.b.c not correct: %s", version);
1817     return (a << 16) | (b << 8) | c;
1818 }
1819 #endif
1820
1821 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1822 {
1823     TCCState *s1 = s;
1824     const TCCOption *popt;
1825     const char *optarg, *r;
1826     const char *run = NULL;
1827     int x;
1828     CString linker_arg; /* collect -Wl options */
1829     int tool = 0, arg_start = 0, noaction = optind;
1830     char **argv = *pargv;
1831     int argc = *pargc;
1832
1833     cstr_new(&linker_arg);
1834
1835     while (optind < argc) {
1836         r = argv[optind];
1837         if (r[0] == '@' && r[1] != '\0') {
1838             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1839             continue;
1840         }
1841         optind++;
1842         if (tool) {
1843             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1844                 ++s->verbose;
1845             continue;
1846         }
1847 reparse:
1848         if (r[0] != '-' || r[1] == '\0') {
1849             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1850                 args_parser_add_file(s, r, s->filetype);
1851             if (run) {
1852                 tcc_set_options(s, run);
1853                 arg_start = optind - 1;
1854                 break;
1855             }
1856             continue;
1857         }
1858
1859         /* find option in table */
1860         for(popt = tcc_options; ; ++popt) {
1861             const char *p1 = popt->name;
1862             const char *r1 = r + 1;
1863             if (p1 == NULL)
1864                 tcc_error("invalid option -- '%s'", r);
1865             if (!strstart(p1, &r1))
1866                 continue;
1867             optarg = r1;
1868             if (popt->flags & TCC_OPTION_HAS_ARG) {
1869                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1870                     if (optind >= argc)
1871                 arg_err:
1872                         tcc_error("argument to '%s' is missing", r);
1873                     optarg = argv[optind++];
1874                 }
1875             } else if (*r1 != '\0')
1876                 continue;
1877             break;
1878         }
1879
1880         switch(popt->index) {
1881         case TCC_OPTION_HELP:
1882             x = OPT_HELP;
1883             goto extra_action;
1884         case TCC_OPTION_HELP2:
1885             x = OPT_HELP2;
1886             goto extra_action;
1887         case TCC_OPTION_I:
1888             tcc_add_include_path(s, optarg);
1889             break;
1890         case TCC_OPTION_D:
1891             tcc_define_symbol(s, optarg, NULL);
1892             break;
1893         case TCC_OPTION_U:
1894             tcc_undefine_symbol(s, optarg);
1895             break;
1896         case TCC_OPTION_L:
1897             tcc_add_library_path(s, optarg);
1898             break;
1899         case TCC_OPTION_B:
1900             /* set tcc utilities path (mainly for tcc development) */
1901             tcc_set_lib_path(s, optarg);
1902             ++noaction;
1903             break;
1904         case TCC_OPTION_l:
1905             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1906             s->nb_libraries++;
1907             break;
1908         case TCC_OPTION_pthread:
1909             s->option_pthread = 1;
1910             break;
1911         case TCC_OPTION_bench:
1912             s->do_bench = 1;
1913             break;
1914 #ifdef CONFIG_TCC_BACKTRACE
1915         case TCC_OPTION_bt:
1916             s->rt_num_callers = atoi(optarg);
1917             s->do_backtrace = 1;
1918             s->do_debug = 1;
1919             s->dwarf = DWARF_VERSION;
1920             break;
1921 #endif
1922 #ifdef CONFIG_TCC_BCHECK
1923         case TCC_OPTION_b:
1924             s->do_bounds_check = 1;
1925             s->do_backtrace = 1;
1926             s->do_debug = 1;
1927             s->dwarf = DWARF_VERSION;
1928             break;
1929 #endif
1930         case TCC_OPTION_g:
1931             s->do_debug = 1;
1932             s->dwarf = DWARF_VERSION;
1933
1934             if (strstart("dwarf", &optarg))
1935                 s->dwarf = (*optarg) ? (0 - atoi(optarg)) : DEFAULT_DWARF_VERSION;
1936             break;
1937         case TCC_OPTION_c:
1938             x = TCC_OUTPUT_OBJ;
1939         set_output_type:
1940             if (s->output_type)
1941                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1942             s->output_type = x;
1943             break;
1944         case TCC_OPTION_d:
1945             if (*optarg == 'D')
1946                 s->dflag = 3;
1947             else if (*optarg == 'M')
1948                 s->dflag = 7;
1949             else if (*optarg == 't')
1950                 s->dflag = 16;
1951             else if (isnum(*optarg))
1952                 s->g_debug |= atoi(optarg);
1953             else
1954                 goto unsupported_option;
1955             break;
1956         case TCC_OPTION_static:
1957             s->static_link = 1;
1958             break;
1959         case TCC_OPTION_std:
1960             if (strcmp(optarg, "=c11") == 0)
1961                 s->cversion = 201112;
1962             break;
1963         case TCC_OPTION_shared:
1964             x = TCC_OUTPUT_DLL;
1965             goto set_output_type;
1966         case TCC_OPTION_soname:
1967             s->soname = tcc_strdup(optarg);
1968             break;
1969         case TCC_OPTION_o:
1970             if (s->outfile) {
1971                 tcc_warning("multiple -o option");
1972                 tcc_free(s->outfile);
1973             }
1974             s->outfile = tcc_strdup(optarg);
1975             break;
1976         case TCC_OPTION_r:
1977             /* generate a .o merging several output files */
1978             s->option_r = 1;
1979             x = TCC_OUTPUT_OBJ;
1980             goto set_output_type;
1981         case TCC_OPTION_isystem:
1982             tcc_add_sysinclude_path(s, optarg);
1983             break;
1984         case TCC_OPTION_include:
1985             cstr_printf(&s->cmdline_incl, "#include \"%s\"\n", optarg);
1986             break;
1987         case TCC_OPTION_nostdinc:
1988             s->nostdinc = 1;
1989             break;
1990         case TCC_OPTION_nostdlib:
1991             s->nostdlib = 1;
1992             break;
1993         case TCC_OPTION_run:
1994 #ifndef TCC_IS_NATIVE
1995             tcc_error("-run is not available in a cross compiler");
1996 #endif
1997             run = optarg;
1998             x = TCC_OUTPUT_MEMORY;
1999             goto set_output_type;
2000         case TCC_OPTION_v:
2001             do ++s->verbose; while (*optarg++ == 'v');
2002             ++noaction;
2003             break;
2004         case TCC_OPTION_f:
2005             if (set_flag(s, options_f, optarg) < 0)
2006                 goto unsupported_option;
2007             break;
2008 #ifdef TCC_TARGET_ARM
2009         case TCC_OPTION_mfloat_abi:
2010             /* tcc doesn't support soft float yet */
2011             if (!strcmp(optarg, "softfp")) {
2012                 s->float_abi = ARM_SOFTFP_FLOAT;
2013             } else if (!strcmp(optarg, "hard"))
2014                 s->float_abi = ARM_HARD_FLOAT;
2015             else
2016                 tcc_error("unsupported float abi '%s'", optarg);
2017             break;
2018 #endif
2019         case TCC_OPTION_m:
2020             if (set_flag(s, options_m, optarg) < 0) {
2021                 if (x = atoi(optarg), x != 32 && x != 64)
2022                     goto unsupported_option;
2023                 if (PTR_SIZE != x/8)
2024                     return x;
2025                 ++noaction;
2026             }
2027             break;
2028         case TCC_OPTION_W:
2029             s->warn_none = 0;
2030             if (optarg[0] && set_flag(s, options_W, optarg) < 0)
2031                 goto unsupported_option;
2032             break;
2033         case TCC_OPTION_w:
2034             s->warn_none = 1;
2035             break;
2036         case TCC_OPTION_rdynamic:
2037             s->rdynamic = 1;
2038             break;
2039         case TCC_OPTION_Wl:
2040             if (linker_arg.size)
2041                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
2042             cstr_cat(&linker_arg, optarg, 0);
2043             if (tcc_set_linker(s, linker_arg.data))
2044                 cstr_free(&linker_arg);
2045             break;
2046         case TCC_OPTION_Wp:
2047             r = optarg;
2048             goto reparse;
2049         case TCC_OPTION_E:
2050             x = TCC_OUTPUT_PREPROCESS;
2051             goto set_output_type;
2052         case TCC_OPTION_P:
2053             s->Pflag = atoi(optarg) + 1;
2054             break;
2055         case TCC_OPTION_M:
2056             s->include_sys_deps = 1;
2057             // fall through
2058         case TCC_OPTION_MM:
2059             s->just_deps = 1;
2060             if(!s->deps_outfile)
2061                 s->deps_outfile = tcc_strdup("-");
2062             // fall through
2063         case TCC_OPTION_MMD:
2064             s->gen_deps = 1;
2065             break;
2066         case TCC_OPTION_MD:
2067             s->gen_deps = 1;
2068             s->include_sys_deps = 1;
2069             break;
2070         case TCC_OPTION_MF:
2071             s->deps_outfile = tcc_strdup(optarg);
2072             break;
2073         case TCC_OPTION_dumpversion:
2074             printf ("%s\n", TCC_VERSION);
2075             exit(0);
2076             break;
2077         case TCC_OPTION_x:
2078             x = 0;
2079             if (*optarg == 'c')
2080                 x = AFF_TYPE_C;
2081             else if (*optarg == 'a')
2082                 x = AFF_TYPE_ASMPP;
2083             else if (*optarg == 'b')
2084                 x = AFF_TYPE_BIN;
2085             else if (*optarg == 'n')
2086                 x = AFF_TYPE_NONE;
2087             else
2088                 tcc_warning("unsupported language '%s'", optarg);
2089             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
2090             break;
2091         case TCC_OPTION_O:
2092             s->optimize = atoi(optarg);
2093             break;
2094         case TCC_OPTION_print_search_dirs:
2095             x = OPT_PRINT_DIRS;
2096             goto extra_action;
2097         case TCC_OPTION_impdef:
2098             x = OPT_IMPDEF;
2099             goto extra_action;
2100 #if defined TCC_TARGET_MACHO
2101         case TCC_OPTION_dynamiclib:
2102             x = TCC_OUTPUT_DLL;
2103             goto set_output_type;
2104         case TCC_OPTION_flat_namespace:
2105              break;
2106         case TCC_OPTION_two_levelnamespace:
2107              break;
2108         case TCC_OPTION_undefined:
2109              break;
2110         case TCC_OPTION_install_name:
2111             s->install_name = tcc_strdup(optarg);
2112             break;
2113         case TCC_OPTION_compatibility_version:
2114             s->compatibility_version = parse_version(s, optarg);
2115             break;
2116         case TCC_OPTION_current_version:
2117             s->current_version = parse_version(s, optarg);;
2118             break;
2119 #endif
2120         case TCC_OPTION_ar:
2121             x = OPT_AR;
2122         extra_action:
2123             arg_start = optind - 1;
2124             if (arg_start != noaction)
2125                 tcc_error("cannot parse %s here", r);
2126             tool = x;
2127             break;
2128         default:
2129 unsupported_option:
2130             tcc_warning_c(warn_unsupported)("unsupported option '%s'", r);
2131             break;
2132         }
2133     }
2134     if (linker_arg.size) {
2135         r = linker_arg.data;
2136         goto arg_err;
2137     }
2138     *pargc = argc - arg_start;
2139     *pargv = argv + arg_start;
2140     if (tool)
2141         return tool;
2142     if (optind != noaction)
2143         return 0;
2144     if (s->verbose == 2)
2145         return OPT_PRINT_DIRS;
2146     if (s->verbose)
2147         return OPT_V;
2148     return OPT_HELP;
2149 }
2150
2151 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
2152 {
2153     char **argv = NULL;
2154     int argc = 0;
2155     args_parser_make_argv(r, &argc, &argv);
2156     tcc_parse_args(s, &argc, &argv, 0);
2157     dynarray_reset(&argv, &argc);
2158 }
2159
2160 PUB_FUNC void tcc_print_stats(TCCState *s1, unsigned total_time)
2161 {
2162     if (total_time < 1)
2163         total_time = 1;
2164     if (total_bytes < 1)
2165         total_bytes = 1;
2166     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
2167                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
2168            total_idents, total_lines, total_bytes,
2169            (double)total_time/1000,
2170            (unsigned)total_lines*1000/total_time,
2171            (double)total_bytes/1000/total_time);
2172     fprintf(stderr, "* text %d, data.rw %d, data.ro %d, bss %d bytes\n",
2173            s1->total_output[0],
2174            s1->total_output[1],
2175            s1->total_output[2],
2176            s1->total_output[3]
2177            );
2178 #ifdef MEM_DEBUG
2179     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
2180 #endif
2181 }