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     dynarray_reset(&s1->files, &s1->nb_files);
 850     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 851     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 852     dynarray_reset(&s1->argv, &s1->argc);
 853     cstr_free(&s1->cmdline_defs);
 854     cstr_free(&s1->cmdline_incl);
 855 #ifdef TCC_IS_NATIVE
 856     /* free runtime memory */
 857     tcc_run_free(s1);
 858 #endif
 859     tcc_free(s1->dState);
 860     tcc_free(s1);
 861 #ifdef MEM_DEBUG
 862     if (0 == --nb_states)
 863         tcc_memcheck();
 864 #endif
 865 }
 866
 867 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 868 {
 869 #ifdef CONFIG_TCC_PIE
 870     if (output_type == TCC_OUTPUT_EXE)
 871         output_type |= TCC_OUTPUT_DYN;
 872 #endif
 873     s->output_type = output_type;
 874
 875     if (!s->nostdinc) {
 876         /* default include paths */
 877         /* -isystem paths have already been handled */
 878         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 879     }
 880
 881     if (output_type == TCC_OUTPUT_PREPROCESS) {
 882         s->do_debug = 0;
 883         return 0;
 884     }
 885
 886     tccelf_new(s);
 887     if (s->do_debug) {
 888         /* add debug sections */
 889         tcc_debug_new(s);
 890     }
 891 #ifdef CONFIG_TCC_BCHECK
 892     if (s->do_bounds_check) {
 893         /* if bound checking, then add corresponding sections */
 894         tccelf_bounds_new(s);
 895     }
 896 #endif
 897
 898     if (output_type == TCC_OUTPUT_OBJ) {
 899         /* always elf for objects */
 900         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 901         return 0;
 902     }
 903
 904     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 905
 906 #ifdef TCC_TARGET_PE
 907 # ifdef _WIN32
 908     /* allow linking with system dll's directly */
 909     tcc_add_systemdir(s);
 910 # endif
 911     /* target PE has its own startup code in libtcc1.a */
 912     return 0;
 913
 914 #elif defined TCC_TARGET_MACHO
 915 # ifdef TCC_IS_NATIVE
 916     tcc_add_macos_sdkpath(s);
 917 # endif
 918     /* Mach-O with LC_MAIN doesn't need any crt startup code.  */
 919     return 0;
 920
 921 #else
 922     /* paths for crt objects */
 923     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 924
 925     /* add libc crt1/crti objects */
 926     if (output_type != TCC_OUTPUT_MEMORY && !s->nostdlib) {
 927 #if TARGETOS_OpenBSD
 928         if (output_type != TCC_OUTPUT_DLL)
 929             tcc_add_crt(s, "crt0.o");
 930         if (output_type == TCC_OUTPUT_DLL)
 931             tcc_add_crt(s, "crtbeginS.o");
 932         else
 933             tcc_add_crt(s, "crtbegin.o");
 934 #elif TARGETOS_FreeBSD
 935         if (output_type != TCC_OUTPUT_DLL)
 936             tcc_add_crt(s, "crt1.o");
 937         tcc_add_crt(s, "crti.o");
 938         if (s->static_link)
 939             tcc_add_crt(s, "crtbeginT.o");
 940         else if (output_type & TCC_OUTPUT_DYN)
 941             tcc_add_crt(s, "crtbeginS.o");
 942         else
 943             tcc_add_crt(s, "crtbegin.o");
 944 #elif TARGETOS_NetBSD
 945         if (output_type != TCC_OUTPUT_DLL)
 946             tcc_add_crt(s, "crt0.o");
 947         tcc_add_crt(s, "crti.o");
 948         if (s->static_link)
 949             tcc_add_crt(s, "crtbeginT.o");
 950         else if (output_type & TCC_OUTPUT_DYN)
 951             tcc_add_crt(s, "crtbeginS.o");
 952         else
 953             tcc_add_crt(s, "crtbegin.o");
 954 #elif defined TARGETOS_ANDROID
 955         if (output_type != TCC_OUTPUT_DLL)
 956             tcc_add_crt(s, "crtbegin_dynamic.o");
 957         else
 958             tcc_add_crt(s, "crtbegin_so.o");
 959 #else
 960         if (output_type != TCC_OUTPUT_DLL)
 961             tcc_add_crt(s, "crt1.o");
 962         tcc_add_crt(s, "crti.o");
 963 #endif
 964     }
 965     return 0;
 966 #endif
 967 }
 968
 969 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 970 {
 971     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
 972     return 0;
 973 }
 974
 975 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
 976 {
 977     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
 978     return 0;
 979 }
 980
 981 /* add/update a 'DLLReference', Just find if level == -1  */
 982 ST_FUNC DLLReference *tcc_add_dllref(TCCState *s1, const char *dllname, int level)
 983 {
 984     DLLReference *ref = NULL;
 985     int i;
 986     for (i = 0; i < s1->nb_loaded_dlls; i++)
 987         if (0 == strcmp(s1->loaded_dlls[i]->name, dllname)) {
 988             ref = s1->loaded_dlls[i];
 989             break;
 990         }
 991     if (level == -1)
 992         return ref;
 993     if (ref) {
 994         if (level < ref->level)
 995             ref->level = level;
 996         ref->found = 1;
 997         return ref;
 998     }
 999     ref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
1000     strcpy(ref->name, dllname);
1001     dynarray_add(&s1->loaded_dlls, &s1->nb_loaded_dlls, ref);
1002     ref->level = level;
1003     ref->index = s1->nb_loaded_dlls;
1004     return ref;
1005 }
1006
1007 /* OpenBSD: choose latest from libxxx.so.x.y versions */
1008 #if defined TARGETOS_OpenBSD && !defined _WIN32
1009 #include <glob.h>
1010 static int tcc_glob_so(TCCState *s1, const char *pattern, char *buf, int size)
1011 {
1012     const char *star;
1013     glob_t g;
1014     char *p;
1015     int i, v, v1, v2, v3;
1016
1017     star = strchr(pattern, '*');
1018     if (!star || glob(pattern, 0, NULL, &g))
1019         return -1;
1020     for (v = -1, i = 0; i < g.gl_pathc; ++i) {
1021         p = g.gl_pathv[i];
1022         if (2 != sscanf(p + (star - pattern), "%d.%d.%d", &v1, &v2, &v3))
1023             continue;
1024         if ((v1 = v1 * 1000 + v2) > v)
1025             v = v1, pstrcpy(buf, size, p);
1026     }
1027     globfree(&g);
1028     return v;
1029 }
1030 #endif
1031
1032 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1033 {
1034     int fd, ret = -1;
1035
1036 #if defined TARGETOS_OpenBSD && !defined _WIN32
1037     char buf[1024];
1038     if (tcc_glob_so(s1, filename, buf, sizeof buf) >= 0)
1039         filename = buf;
1040 #endif
1041
1042     /* ignore binary files with -E */
1043     if (s1->output_type == TCC_OUTPUT_PREPROCESS
1044         && (flags & AFF_TYPE_BIN))
1045         return 0;
1046
1047     /* open the file */
1048     fd = _tcc_open(s1, filename);
1049     if (fd < 0) {
1050         if (flags & AFF_PRINT_ERROR)
1051             tcc_error_noabort("file '%s' not found", filename);
1052         return ret;
1053     }
1054
1055     s1->current_filename = filename;
1056     if (flags & AFF_TYPE_BIN) {
1057         ElfW(Ehdr) ehdr;
1058         int obj_type;
1059
1060         obj_type = tcc_object_type(fd, &ehdr);
1061         lseek(fd, 0, SEEK_SET);
1062
1063         switch (obj_type) {
1064
1065         case AFF_BINTYPE_REL:
1066             ret = tcc_load_object_file(s1, fd, 0);
1067             break;
1068
1069         case AFF_BINTYPE_AR:
1070             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1071             break;
1072
1073 #ifdef TCC_TARGET_PE
1074         default:
1075             ret = pe_load_file(s1, fd, filename);
1076             goto check_success;
1077
1078 #elif defined TCC_TARGET_MACHO
1079         case AFF_BINTYPE_DYN:
1080         case_dyn_or_tbd:
1081             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1082 #ifdef TCC_IS_NATIVE
1083                 void* dl;
1084                 const char* soname = filename;
1085                 if (obj_type != AFF_BINTYPE_DYN)
1086                     soname = macho_tbd_soname(filename);
1087                 dl = dlopen(soname, RTLD_GLOBAL | RTLD_LAZY);
1088                 if (dl)
1089                     tcc_add_dllref(s1, soname, 0)->handle = dl, ret = 0;
1090                 if (filename != soname)
1091                     tcc_free((void *)soname);
1092 #endif
1093             } else if (obj_type == AFF_BINTYPE_DYN) {
1094                 ret = macho_load_dll(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1095             } else {
1096                 ret = macho_load_tbd(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1097             }
1098             break;
1099         default:
1100         {
1101             const char *ext = tcc_fileextension(filename);
1102             if (!strcmp(ext, ".tbd"))
1103                 goto case_dyn_or_tbd;
1104             if (!strcmp(ext, ".dylib")) {
1105                 obj_type = AFF_BINTYPE_DYN;
1106                 goto case_dyn_or_tbd;
1107             }
1108             goto check_success;
1109         }
1110
1111 #else /* unix */
1112         case AFF_BINTYPE_DYN:
1113             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1114 #ifdef TCC_IS_NATIVE
1115                 void* dl = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1116                 if (dl)
1117                     tcc_add_dllref(s1, filename, 0)->handle = dl, ret = 0;
1118 #endif
1119             } else
1120                 ret = tcc_load_dll(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1121             break;
1122
1123         default:
1124             /* as GNU ld, consider it is an ld script if not recognized */
1125             ret = tcc_load_ldscript(s1, fd);
1126             goto check_success;
1127
1128 #endif /* pe / macos / unix */
1129
1130 check_success:
1131             if (ret < 0)
1132                 tcc_error_noabort("%s: unrecognized file type", filename);
1133             break;
1134
1135 #ifdef TCC_TARGET_COFF
1136         case AFF_BINTYPE_C67:
1137             ret = tcc_load_coff(s1, fd);
1138             break;
1139 #endif
1140         }
1141         close(fd);
1142     } else {
1143         /* update target deps */
1144         dynarray_add(&s1->target_deps, &s1->nb_target_deps, tcc_strdup(filename));
1145         ret = tcc_compile(s1, flags, filename, fd);
1146     }
1147     s1->current_filename = NULL;
1148     return ret;
1149 }
1150
1151 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1152 {
1153     int filetype = s->filetype;
1154     if (0 == (filetype & AFF_TYPE_MASK)) {
1155         /* use a file extension to detect a filetype */
1156         const char *ext = tcc_fileextension(filename);
1157         if (ext[0]) {
1158             ext++;
1159             if (!strcmp(ext, "S"))
1160                 filetype = AFF_TYPE_ASMPP;
1161             else if (!strcmp(ext, "s"))
1162                 filetype = AFF_TYPE_ASM;
1163             else if (!PATHCMP(ext, "c")
1164                      || !PATHCMP(ext, "h")
1165                      || !PATHCMP(ext, "i"))
1166                 filetype = AFF_TYPE_C;
1167             else
1168                 filetype |= AFF_TYPE_BIN;
1169         } else {
1170             filetype = AFF_TYPE_C;
1171         }
1172     }
1173     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1174 }
1175
1176 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1177 {
1178     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1179     return 0;
1180 }
1181
1182 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1183     const char *filename, int flags, char **paths, int nb_paths)
1184 {
1185     char buf[1024];
1186     int i;
1187
1188     for(i = 0; i < nb_paths; i++) {
1189         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1190         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1191             return 0;
1192     }
1193     return -1;
1194 }
1195
1196 /* find and load a dll. Return non zero if not found */
1197 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1198 {
1199     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1200         s->library_paths, s->nb_library_paths);
1201 }
1202
1203 /* find [cross-]libtcc1.a and tcc helper objects in library path */
1204 ST_FUNC void tcc_add_support(TCCState *s1, const char *filename)
1205 {
1206     char buf[100];
1207     if (CONFIG_TCC_CROSSPREFIX[0])
1208         filename = strcat(strcpy(buf, CONFIG_TCC_CROSSPREFIX), filename);
1209     if (tcc_add_dll(s1, filename, 0) < 0)
1210         tcc_error_noabort("%s not found", filename);
1211 }
1212
1213 #if !defined TCC_TARGET_PE && !defined TCC_TARGET_MACHO
1214 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)
1215 {
1216     if (-1 == tcc_add_library_internal(s1, "%s/%s",
1217         filename, 0, s1->crt_paths, s1->nb_crt_paths))
1218         tcc_error_noabort("file '%s' not found", filename);
1219     return 0;
1220 }
1221 #endif
1222
1223 /* the library name is the same as the argument of the '-l' option */
1224 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1225 {
1226 #if defined TCC_TARGET_PE
1227     static const char * const libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1228     const char * const *pp = s->static_link ? libs + 4 : libs;
1229 #elif defined TCC_TARGET_MACHO
1230     static const char * const libs[] = { "%s/lib%s.dylib", "%s/lib%s.tbd", "%s/lib%s.a", NULL };
1231     const char * const *pp = s->static_link ? libs + 2 : libs;
1232 #elif defined TARGETOS_OpenBSD
1233     static const char * const libs[] = { "%s/lib%s.so.*", "%s/lib%s.a", NULL };
1234     const char * const *pp = s->static_link ? libs + 1 : libs;
1235 #else
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 #endif
1239     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1240     while (*pp) {
1241         if (0 == tcc_add_library_internal(s, *pp,
1242             libraryname, flags, s->library_paths, s->nb_library_paths))
1243             return 0;
1244         ++pp;
1245     }
1246     return -1;
1247 }
1248
1249 PUB_FUNC int tcc_add_library_err(TCCState *s1, const char *libname)
1250 {
1251     int ret = tcc_add_library(s1, libname);
1252     if (ret < 0)
1253         tcc_error_noabort("library '%s' not found", libname);
1254     return ret;
1255 }
1256
1257 /* handle #pragma comment(lib,) */
1258 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1259 {
1260     int i;
1261     for (i = 0; i < s1->nb_pragma_libs; i++)
1262         tcc_add_library_err(s1, s1->pragma_libs[i]);
1263 }
1264
1265 LIBTCCAPI int tcc_add_symbol(TCCState *s1, const char *name, const void *val)
1266 {
1267 #ifdef TCC_TARGET_PE
1268     /* On x86_64 'val' might not be reachable with a 32bit offset.
1269        So it is handled here as if it were in a DLL. */
1270     pe_putimport(s1, 0, name, (uintptr_t)val);
1271 #else
1272     char buf[256];
1273     if (s1->leading_underscore) {
1274         buf[0] = '_';
1275         pstrcpy(buf + 1, sizeof(buf) - 1, name);
1276         name = buf;
1277     }
1278     set_global_sym(s1, name, NULL, (addr_t)(uintptr_t)val); /* NULL: SHN_ABS */
1279 #endif
1280     return 0;
1281 }
1282
1283 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1284 {
1285     tcc_free(s->tcc_lib_path);
1286     s->tcc_lib_path = tcc_strdup(path);
1287 }
1288
1289 /********************************************************/
1290 /* options parser */
1291
1292 static int strstart(const char *val, const char **str)
1293 {
1294     const char *p, *q;
1295     p = *str;
1296     q = val;
1297     while (*q) {
1298         if (*p != *q)
1299             return 0;
1300         p++;
1301         q++;
1302     }
1303     *str = p;
1304     return 1;
1305 }
1306
1307 /* Like strstart, but automatically takes into account that ld options can
1308  *
1309  * - start with double or single dash (e.g. '--soname' or '-soname')
1310  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1311  *   or '-Wl,-soname=x.so')
1312  *
1313  * you provide `val` always in 'option[=]' form (no leading -)
1314  */
1315 static int link_option(const char *str, const char *val, const char **ptr)
1316 {
1317     const char *p, *q;
1318     int ret;
1319
1320     /* there should be 1 or 2 dashes */
1321     if (*str++ != '-')
1322         return 0;
1323     if (*str == '-')
1324         str++;
1325
1326     /* then str & val should match (potentially up to '=') */
1327     p = str;
1328     q = val;
1329
1330     ret = 1;
1331     if (q[0] == '?') {
1332         ++q;
1333         if (strstart("no-", &p))
1334             ret = -1;
1335     }
1336
1337     while (*q != '\0' && *q != '=') {
1338         if (*p != *q)
1339             return 0;
1340         p++;
1341         q++;
1342     }
1343
1344     /* '=' near eos means ',' or '=' is ok */
1345     if (*q == '=') {
1346         if (*p == 0)
1347             *ptr = p;
1348         if (*p != ',' && *p != '=')
1349             return 0;
1350         p++;
1351     } else if (*p) {
1352         return 0;
1353     }
1354     *ptr = p;
1355     return ret;
1356 }
1357
1358 static const char *skip_linker_arg(const char **str)
1359 {
1360     const char *s1 = *str;
1361     const char *s2 = strchr(s1, ',');
1362     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1363     return s2;
1364 }
1365
1366 static void copy_linker_arg(char **pp, const char *s, int sep)
1367 {
1368     const char *q = s;
1369     char *p = *pp;
1370     int l = 0;
1371     if (p && sep)
1372         p[l = strlen(p)] = sep, ++l;
1373     skip_linker_arg(&q);
1374     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1375 }
1376
1377 /* set linker options */
1378 static int tcc_set_linker(TCCState *s, const char *option)
1379 {
1380     TCCState *s1 = s;
1381     while (*option) {
1382
1383         const char *p = NULL;
1384         char *end = NULL;
1385         int ignoring = 0;
1386         int ret;
1387
1388         if (link_option(option, "Bsymbolic", &p)) {
1389             s->symbolic = 1;
1390         } else if (link_option(option, "nostdlib", &p)) {
1391             s->nostdlib = 1;
1392         } else if (link_option(option, "e=", &p)
1393                ||  link_option(option, "entry=", &p)) {
1394             copy_linker_arg(&s->elf_entryname, p, 0);
1395         } else if (link_option(option, "fini=", &p)) {
1396             copy_linker_arg(&s->fini_symbol, p, 0);
1397             ignoring = 1;
1398         } else if (link_option(option, "image-base=", &p)
1399                 || link_option(option, "Ttext=", &p)) {
1400             s->text_addr = strtoull(p, &end, 16);
1401             s->has_text_addr = 1;
1402         } else if (link_option(option, "init=", &p)) {
1403             copy_linker_arg(&s->init_symbol, p, 0);
1404             ignoring = 1;
1405         } else if (link_option(option, "Map=", &p)) {
1406             copy_linker_arg(&s->mapfile, p, 0);
1407             ignoring = 1;
1408         } else if (link_option(option, "oformat=", &p)) {
1409 #if defined(TCC_TARGET_PE)
1410             if (strstart("pe-", &p)) {
1411 #elif PTR_SIZE == 8
1412             if (strstart("elf64-", &p)) {
1413 #else
1414             if (strstart("elf32-", &p)) {
1415 #endif
1416                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1417             } else if (!strcmp(p, "binary")) {
1418                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1419 #ifdef TCC_TARGET_COFF
1420             } else if (!strcmp(p, "coff")) {
1421                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1422 #endif
1423             } else
1424                 goto err;
1425
1426         } else if (link_option(option, "as-needed", &p)) {
1427             ignoring = 1;
1428         } else if (link_option(option, "O", &p)) {
1429             ignoring = 1;
1430         } else if (link_option(option, "export-all-symbols", &p)) {
1431             s->rdynamic = 1;
1432         } else if (link_option(option, "export-dynamic", &p)) {
1433             s->rdynamic = 1;
1434         } else if (link_option(option, "rpath=", &p)) {
1435             copy_linker_arg(&s->rpath, p, ':');
1436         } else if (link_option(option, "enable-new-dtags", &p)) {
1437             s->enable_new_dtags = 1;
1438         } else if (link_option(option, "section-alignment=", &p)) {
1439             s->section_align = strtoul(p, &end, 16);
1440         } else if (link_option(option, "soname=", &p)) {
1441             copy_linker_arg(&s->soname, p, 0);
1442 #ifdef TCC_TARGET_PE
1443         } else if (link_option(option, "large-address-aware", &p)) {
1444             s->pe_characteristics |= 0x20;
1445         } else if (link_option(option, "file-alignment=", &p)) {
1446             s->pe_file_align = strtoul(p, &end, 16);
1447         } else if (link_option(option, "stack=", &p)) {
1448             s->pe_stack_size = strtoul(p, &end, 10);
1449         } else if (link_option(option, "subsystem=", &p)) {
1450 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1451             if (!strcmp(p, "native")) {
1452                 s->pe_subsystem = 1;
1453             } else if (!strcmp(p, "console")) {
1454                 s->pe_subsystem = 3;
1455             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1456                 s->pe_subsystem = 2;
1457             } else if (!strcmp(p, "posix")) {
1458                 s->pe_subsystem = 7;
1459             } else if (!strcmp(p, "efiapp")) {
1460                 s->pe_subsystem = 10;
1461             } else if (!strcmp(p, "efiboot")) {
1462                 s->pe_subsystem = 11;
1463             } else if (!strcmp(p, "efiruntime")) {
1464                 s->pe_subsystem = 12;
1465             } else if (!strcmp(p, "efirom")) {
1466                 s->pe_subsystem = 13;
1467 #elif defined(TCC_TARGET_ARM)
1468             if (!strcmp(p, "wince")) {
1469                 s->pe_subsystem = 9;
1470 #endif
1471             } else
1472                 goto err;
1473 #endif
1474         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1475             if (ret > 0)
1476                 s->filetype |= AFF_WHOLE_ARCHIVE;
1477             else
1478                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1479         } else if (link_option(option, "z=", &p)) {
1480             ignoring = 1;
1481         } else if (p) {
1482             return 0;
1483         } else {
1484     err:
1485             tcc_error("unsupported linker option '%s'", option);
1486         }
1487         if (ignoring)
1488             tcc_warning_c(warn_unsupported)("unsupported linker option '%s'", option);
1489         option = skip_linker_arg(&p);
1490     }
1491     return 1;
1492 }
1493
1494 typedef struct TCCOption {
1495     const char *name;
1496     uint16_t index;
1497     uint16_t flags;
1498 } TCCOption;
1499
1500 enum {
1501     TCC_OPTION_ignored = 0,
1502     TCC_OPTION_HELP,
1503     TCC_OPTION_HELP2,
1504     TCC_OPTION_v,
1505     TCC_OPTION_I,
1506     TCC_OPTION_D,
1507     TCC_OPTION_U,
1508     TCC_OPTION_P,
1509     TCC_OPTION_L,
1510     TCC_OPTION_B,
1511     TCC_OPTION_l,
1512     TCC_OPTION_bench,
1513     TCC_OPTION_bt,
1514     TCC_OPTION_b,
1515     TCC_OPTION_ba,
1516     TCC_OPTION_g,
1517     TCC_OPTION_c,
1518     TCC_OPTION_dumpversion,
1519     TCC_OPTION_d,
1520     TCC_OPTION_static,
1521     TCC_OPTION_std,
1522     TCC_OPTION_shared,
1523     TCC_OPTION_soname,
1524     TCC_OPTION_o,
1525     TCC_OPTION_r,
1526     TCC_OPTION_Wl,
1527     TCC_OPTION_Wp,
1528     TCC_OPTION_W,
1529     TCC_OPTION_O,
1530     TCC_OPTION_mfloat_abi,
1531     TCC_OPTION_m,
1532     TCC_OPTION_f,
1533     TCC_OPTION_isystem,
1534     TCC_OPTION_iwithprefix,
1535     TCC_OPTION_include,
1536     TCC_OPTION_nostdinc,
1537     TCC_OPTION_nostdlib,
1538     TCC_OPTION_print_search_dirs,
1539     TCC_OPTION_rdynamic,
1540     TCC_OPTION_pthread,
1541     TCC_OPTION_run,
1542     TCC_OPTION_w,
1543     TCC_OPTION_E,
1544     TCC_OPTION_M,
1545     TCC_OPTION_MD,
1546     TCC_OPTION_MF,
1547     TCC_OPTION_MM,
1548     TCC_OPTION_MMD,
1549     TCC_OPTION_x,
1550     TCC_OPTION_ar,
1551     TCC_OPTION_impdef,
1552 };
1553
1554 #define TCC_OPTION_HAS_ARG 0x0001
1555 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1556
1557 static const TCCOption tcc_options[] = {
1558     { "h", TCC_OPTION_HELP, 0 },
1559     { "-help", TCC_OPTION_HELP, 0 },
1560     { "?", TCC_OPTION_HELP, 0 },
1561     { "hh", TCC_OPTION_HELP2, 0 },
1562     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1563     { "-version", TCC_OPTION_v, 0 }, /* handle as verbose, also prints version*/
1564     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1565     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1566     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1567     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1568     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1569     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1570     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1571     { "bench", TCC_OPTION_bench, 0 },
1572 #ifdef CONFIG_TCC_BACKTRACE
1573     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1574 #endif
1575 #ifdef CONFIG_TCC_BCHECK
1576     { "b", TCC_OPTION_b, 0 },
1577 #endif
1578     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1579     { "c", TCC_OPTION_c, 0 },
1580     { "dumpversion", TCC_OPTION_dumpversion, 0},
1581     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1582     { "static", TCC_OPTION_static, 0 },
1583     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1584     { "shared", TCC_OPTION_shared, 0 },
1585     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1586     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1587     { "pthread", TCC_OPTION_pthread, 0},
1588     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1589     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1590     { "r", TCC_OPTION_r, 0 },
1591     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1592     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1593     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1594     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1595 #ifdef TCC_TARGET_ARM
1596     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1597 #endif
1598     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1599     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1600     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1601     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1602     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1603     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1604     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1605     { "w", TCC_OPTION_w, 0 },
1606     { "E", TCC_OPTION_E, 0},
1607     { "M", TCC_OPTION_M, 0},
1608     { "MD", TCC_OPTION_MD, 0},
1609     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1610     { "MM", TCC_OPTION_MM, 0},
1611     { "MMD", TCC_OPTION_MMD, 0},
1612     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1613     { "ar", TCC_OPTION_ar, 0},
1614 #ifdef TCC_TARGET_PE
1615     { "impdef", TCC_OPTION_impdef, 0},
1616 #endif
1617     /* ignored (silently, except after -Wunsupported) */
1618     { "arch", 0, TCC_OPTION_HAS_ARG},
1619     { "C", 0, 0 },
1620     { "-param", 0, TCC_OPTION_HAS_ARG },
1621     { "pedantic", 0, 0 },
1622     { "pipe", 0, 0 },
1623     { "s", 0, 0 },
1624     { "traditional", 0, 0 },
1625     { NULL, 0, 0 },
1626 };
1627
1628 typedef struct FlagDef {
1629     uint16_t offset;
1630     uint16_t flags;
1631     const char *name;
1632 } FlagDef;
1633
1634 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1635 #define FD_INVERT 0x0002 /* invert value before storing */
1636
1637 static const FlagDef options_W[] = {
1638     { offsetof(TCCState, warn_all), WD_ALL, "all" },
1639     { offsetof(TCCState, warn_error), 0, "error" },
1640     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1641     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1642     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL, "implicit-function-declaration" },
1643     { offsetof(TCCState, warn_discarded_qualifiers), WD_ALL, "discarded-qualifiers" },
1644     { 0, 0, NULL }
1645 };
1646
1647 static const FlagDef options_f[] = {
1648     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1649     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1650     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1651     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1652     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1653     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1654     { offsetof(TCCState, test_coverage), 0, "test-coverage" },
1655     { 0, 0, NULL }
1656 };
1657
1658 static const FlagDef options_m[] = {
1659     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1660 #ifdef TCC_TARGET_X86_64
1661     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1662 #endif
1663     { 0, 0, NULL }
1664 };
1665
1666 static int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1667 {
1668     int value, mask, ret;
1669     const FlagDef *p;
1670     const char *r;
1671     unsigned char *f;
1672
1673     r = name, value = !strstart("no-", &r), mask = 0;
1674
1675     /* when called with options_W, look for -W[no-]error=<option> */
1676     if ((flags->flags & WD_ALL) && strstart("error=", &r))
1677         value = value ? WARN_ON|WARN_ERR : WARN_NOE, mask = WARN_ON;
1678
1679     for (ret = -1, p = flags; p->name; ++p) {
1680         if (ret) {
1681             if (strcmp(r, p->name))
1682                 continue;
1683         } else {
1684             if (0 == (p->flags & WD_ALL))
1685                 continue;
1686         }
1687
1688         f = (unsigned char *)s + p->offset;
1689         *f = (*f & mask) | (value ^ !!(p->flags & FD_INVERT));
1690
1691         if (ret) {
1692             ret = 0;
1693             if (strcmp(r, "all"))
1694                 break;
1695         }
1696     }
1697     return ret;
1698 }
1699
1700 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1701 {
1702     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1703     f->type = filetype;
1704     strcpy(f->name, filename);
1705     dynarray_add(&s->files, &s->nb_files, f);
1706 }
1707
1708 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1709 {
1710     int ret = 0, q, c;
1711     CString str;
1712     for(;;) {
1713         while (c = (unsigned char)*r, c && c <= ' ')
1714           ++r;
1715         if (c == 0)
1716             break;
1717         q = 0;
1718         cstr_new(&str);
1719         while (c = (unsigned char)*r, c) {
1720             ++r;
1721             if (c == '\\' && (*r == '"' || *r == '\\')) {
1722                 c = *r++;
1723             } else if (c == '"') {
1724                 q = !q;
1725                 continue;
1726             } else if (q == 0 && c <= ' ') {
1727                 break;
1728             }
1729             cstr_ccat(&str, c);
1730         }
1731         cstr_ccat(&str, 0);
1732         //printf("<%s>\n", str.data), fflush(stdout);
1733         dynarray_add(argv, argc, tcc_strdup(str.data));
1734         cstr_free(&str);
1735         ++ret;
1736     }
1737     return ret;
1738 }
1739
1740 /* read list file */
1741 static void args_parser_listfile(TCCState *s,
1742     const char *filename, int optind, int *pargc, char ***pargv)
1743 {
1744     TCCState *s1 = s;
1745     int fd, i;
1746     char *p;
1747     int argc = 0;
1748     char **argv = NULL;
1749
1750     fd = open(filename, O_RDONLY | O_BINARY);
1751     if (fd < 0)
1752         tcc_error("listfile '%s' not found", filename);
1753
1754     p = tcc_load_text(fd);
1755     for (i = 0; i < *pargc; ++i)
1756         if (i == optind)
1757             args_parser_make_argv(p, &argc, &argv);
1758         else
1759             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1760
1761     tcc_free(p);
1762     dynarray_reset(&s->argv, &s->argc);
1763     *pargc = s->argc = argc, *pargv = s->argv = argv;
1764 }
1765
1766 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1767 {
1768     TCCState *s1 = s;
1769     const TCCOption *popt;
1770     const char *optarg, *r;
1771     const char *run = NULL;
1772     int x;
1773     CString linker_arg; /* collect -Wl options */
1774     int tool = 0, arg_start = 0, noaction = optind;
1775     char **argv = *pargv;
1776     int argc = *pargc;
1777
1778     cstr_new(&linker_arg);
1779
1780     while (optind < argc) {
1781         r = argv[optind];
1782         if (r[0] == '@' && r[1] != '\0') {
1783             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1784             continue;
1785         }
1786         optind++;
1787         if (tool) {
1788             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1789                 ++s->verbose;
1790             continue;
1791         }
1792 reparse:
1793         if (r[0] != '-' || r[1] == '\0') {
1794             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1795                 args_parser_add_file(s, r, s->filetype);
1796             if (run) {
1797                 tcc_set_options(s, run);
1798                 arg_start = optind - 1;
1799                 break;
1800             }
1801             continue;
1802         }
1803
1804         /* find option in table */
1805         for(popt = tcc_options; ; ++popt) {
1806             const char *p1 = popt->name;
1807             const char *r1 = r + 1;
1808             if (p1 == NULL)
1809                 tcc_error("invalid option -- '%s'", r);
1810             if (!strstart(p1, &r1))
1811                 continue;
1812             optarg = r1;
1813             if (popt->flags & TCC_OPTION_HAS_ARG) {
1814                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1815                     if (optind >= argc)
1816                 arg_err:
1817                         tcc_error("argument to '%s' is missing", r);
1818                     optarg = argv[optind++];
1819                 }
1820             } else if (*r1 != '\0')
1821                 continue;
1822             break;
1823         }
1824
1825         switch(popt->index) {
1826         case TCC_OPTION_HELP:
1827             x = OPT_HELP;
1828             goto extra_action;
1829         case TCC_OPTION_HELP2:
1830             x = OPT_HELP2;
1831             goto extra_action;
1832         case TCC_OPTION_I:
1833             tcc_add_include_path(s, optarg);
1834             break;
1835         case TCC_OPTION_D:
1836             tcc_define_symbol(s, optarg, NULL);
1837             break;
1838         case TCC_OPTION_U:
1839             tcc_undefine_symbol(s, optarg);
1840             break;
1841         case TCC_OPTION_L:
1842             tcc_add_library_path(s, optarg);
1843             break;
1844         case TCC_OPTION_B:
1845             /* set tcc utilities path (mainly for tcc development) */
1846             tcc_set_lib_path(s, optarg);
1847             ++noaction;
1848             break;
1849         case TCC_OPTION_l:
1850             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1851             s->nb_libraries++;
1852             break;
1853         case TCC_OPTION_pthread:
1854             s->option_pthread = 1;
1855             break;
1856         case TCC_OPTION_bench:
1857             s->do_bench = 1;
1858             break;
1859 #ifdef CONFIG_TCC_BACKTRACE
1860         case TCC_OPTION_bt:
1861             s->rt_num_callers = atoi(optarg);
1862             s->do_backtrace = 1;
1863             s->do_debug = 1;
1864             s->dwarf = DWARF_VERSION;
1865             break;
1866 #endif
1867 #ifdef CONFIG_TCC_BCHECK
1868         case TCC_OPTION_b:
1869             s->do_bounds_check = 1;
1870             s->do_backtrace = 1;
1871             s->do_debug = 1;
1872             s->dwarf = DWARF_VERSION;
1873             break;
1874 #endif
1875         case TCC_OPTION_g:
1876             s->do_debug = 1;
1877             s->dwarf = DWARF_VERSION;
1878
1879             if (strstart("dwarf", &optarg))
1880                 s->dwarf = (*optarg) ? (0 - atoi(optarg)) : DEFAULT_DWARF_VERSION;
1881             break;
1882         case TCC_OPTION_c:
1883             x = TCC_OUTPUT_OBJ;
1884         set_output_type:
1885             if (s->output_type)
1886                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1887             s->output_type = x;
1888             break;
1889         case TCC_OPTION_d:
1890             if (*optarg == 'D')
1891                 s->dflag = 3;
1892             else if (*optarg == 'M')
1893                 s->dflag = 7;
1894             else if (*optarg == 't')
1895                 s->dflag = 16;
1896             else if (isnum(*optarg))
1897                 s->g_debug |= atoi(optarg);
1898             else
1899                 goto unsupported_option;
1900             break;
1901         case TCC_OPTION_static:
1902             s->static_link = 1;
1903             break;
1904         case TCC_OPTION_std:
1905             if (strcmp(optarg, "=c11") == 0)
1906                 s->cversion = 201112;
1907             break;
1908         case TCC_OPTION_shared:
1909             x = TCC_OUTPUT_DLL;
1910             goto set_output_type;
1911         case TCC_OPTION_soname:
1912             s->soname = tcc_strdup(optarg);
1913             break;
1914         case TCC_OPTION_o:
1915             if (s->outfile) {
1916                 tcc_warning("multiple -o option");
1917                 tcc_free(s->outfile);
1918             }
1919             s->outfile = tcc_strdup(optarg);
1920             break;
1921         case TCC_OPTION_r:
1922             /* generate a .o merging several output files */
1923             s->option_r = 1;
1924             x = TCC_OUTPUT_OBJ;
1925             goto set_output_type;
1926         case TCC_OPTION_isystem:
1927             tcc_add_sysinclude_path(s, optarg);
1928             break;
1929         case TCC_OPTION_include:
1930             cstr_printf(&s->cmdline_incl, "#include \"%s\"\n", optarg);
1931             break;
1932         case TCC_OPTION_nostdinc:
1933             s->nostdinc = 1;
1934             break;
1935         case TCC_OPTION_nostdlib:
1936             s->nostdlib = 1;
1937             break;
1938         case TCC_OPTION_run:
1939 #ifndef TCC_IS_NATIVE
1940             tcc_error("-run is not available in a cross compiler");
1941 #endif
1942             run = optarg;
1943             x = TCC_OUTPUT_MEMORY;
1944             goto set_output_type;
1945         case TCC_OPTION_v:
1946             do ++s->verbose; while (*optarg++ == 'v');
1947             ++noaction;
1948             break;
1949         case TCC_OPTION_f:
1950             if (set_flag(s, options_f, optarg) < 0)
1951                 goto unsupported_option;
1952             break;
1953 #ifdef TCC_TARGET_ARM
1954         case TCC_OPTION_mfloat_abi:
1955             /* tcc doesn't support soft float yet */
1956             if (!strcmp(optarg, "softfp")) {
1957                 s->float_abi = ARM_SOFTFP_FLOAT;
1958             } else if (!strcmp(optarg, "hard"))
1959                 s->float_abi = ARM_HARD_FLOAT;
1960             else
1961                 tcc_error("unsupported float abi '%s'", optarg);
1962             break;
1963 #endif
1964         case TCC_OPTION_m:
1965             if (set_flag(s, options_m, optarg) < 0) {
1966                 if (x = atoi(optarg), x != 32 && x != 64)
1967                     goto unsupported_option;
1968                 if (PTR_SIZE != x/8)
1969                     return x;
1970                 ++noaction;
1971             }
1972             break;
1973         case TCC_OPTION_W:
1974             s->warn_none = 0;
1975             if (optarg[0] && set_flag(s, options_W, optarg) < 0)
1976                 goto unsupported_option;
1977             break;
1978         case TCC_OPTION_w:
1979             s->warn_none = 1;
1980             break;
1981         case TCC_OPTION_rdynamic:
1982             s->rdynamic = 1;
1983             break;
1984         case TCC_OPTION_Wl:
1985             if (linker_arg.size)
1986                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1987             cstr_cat(&linker_arg, optarg, 0);
1988             if (tcc_set_linker(s, linker_arg.data))
1989                 cstr_free(&linker_arg);
1990             break;
1991         case TCC_OPTION_Wp:
1992             r = optarg;
1993             goto reparse;
1994         case TCC_OPTION_E:
1995             x = TCC_OUTPUT_PREPROCESS;
1996             goto set_output_type;
1997         case TCC_OPTION_P:
1998             s->Pflag = atoi(optarg) + 1;
1999             break;
2000         case TCC_OPTION_M:
2001             s->include_sys_deps = 1;
2002             // fall through
2003         case TCC_OPTION_MM:
2004             s->just_deps = 1;
2005             if(!s->deps_outfile)
2006                 s->deps_outfile = tcc_strdup("-");
2007             // fall through
2008         case TCC_OPTION_MMD:
2009             s->gen_deps = 1;
2010             break;
2011         case TCC_OPTION_MD:
2012             s->gen_deps = 1;
2013             s->include_sys_deps = 1;
2014             break;
2015         case TCC_OPTION_MF:
2016             s->deps_outfile = tcc_strdup(optarg);
2017             break;
2018         case TCC_OPTION_dumpversion:
2019             printf ("%s\n", TCC_VERSION);
2020             exit(0);
2021             break;
2022         case TCC_OPTION_x:
2023             x = 0;
2024             if (*optarg == 'c')
2025                 x = AFF_TYPE_C;
2026             else if (*optarg == 'a')
2027                 x = AFF_TYPE_ASMPP;
2028             else if (*optarg == 'b')
2029                 x = AFF_TYPE_BIN;
2030             else if (*optarg == 'n')
2031                 x = AFF_TYPE_NONE;
2032             else
2033                 tcc_warning("unsupported language '%s'", optarg);
2034             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
2035             break;
2036         case TCC_OPTION_O:
2037             s->optimize = atoi(optarg);
2038             break;
2039         case TCC_OPTION_print_search_dirs:
2040             x = OPT_PRINT_DIRS;
2041             goto extra_action;
2042         case TCC_OPTION_impdef:
2043             x = OPT_IMPDEF;
2044             goto extra_action;
2045         case TCC_OPTION_ar:
2046             x = OPT_AR;
2047         extra_action:
2048             arg_start = optind - 1;
2049             if (arg_start != noaction)
2050                 tcc_error("cannot parse %s here", r);
2051             tool = x;
2052             break;
2053         default:
2054 unsupported_option:
2055             tcc_warning_c(warn_unsupported)("unsupported option '%s'", r);
2056             break;
2057         }
2058     }
2059     if (linker_arg.size) {
2060         r = linker_arg.data;
2061         goto arg_err;
2062     }
2063     *pargc = argc - arg_start;
2064     *pargv = argv + arg_start;
2065     if (tool)
2066         return tool;
2067     if (optind != noaction)
2068         return 0;
2069     if (s->verbose == 2)
2070         return OPT_PRINT_DIRS;
2071     if (s->verbose)
2072         return OPT_V;
2073     return OPT_HELP;
2074 }
2075
2076 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
2077 {
2078     char **argv = NULL;
2079     int argc = 0;
2080     args_parser_make_argv(r, &argc, &argv);
2081     tcc_parse_args(s, &argc, &argv, 0);
2082     dynarray_reset(&argv, &argc);
2083 }
2084
2085 PUB_FUNC void tcc_print_stats(TCCState *s1, unsigned total_time)
2086 {
2087     if (total_time < 1)
2088         total_time = 1;
2089     if (total_bytes < 1)
2090         total_bytes = 1;
2091     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
2092                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
2093            total_idents, total_lines, total_bytes,
2094            (double)total_time/1000,
2095            (unsigned)total_lines*1000/total_time,
2096            (double)total_bytes/1000/total_time);
2097     fprintf(stderr, "* text %d, data.rw %d, data.ro %d, bss %d bytes\n",
2098            s1->total_output[0],
2099            s1->total_output[1],
2100            s1->total_output[2],
2101            s1->total_output[3]
2102            );
2103 #ifdef MEM_DEBUG
2104     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
2105 #endif
2106 }