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 "tccelf.c"
  25 #include "tccrun.c"
  26 #ifdef TCC_TARGET_I386
  27 #include "i386-gen.c"
  28 #include "i386-link.c"
  29 #include "i386-asm.c"
  30 #elif defined(TCC_TARGET_ARM)
  31 #include "arm-gen.c"
  32 #include "arm-link.c"
  33 #include "arm-asm.c"
  34 #elif defined(TCC_TARGET_ARM64)
  35 #include "arm64-gen.c"
  36 #include "arm64-link.c"
  37 #include "arm-asm.c"
  38 #elif defined(TCC_TARGET_C67)
  39 #include "c67-gen.c"
  40 #include "c67-link.c"
  41 #include "tcccoff.c"
  42 #elif defined(TCC_TARGET_X86_64)
  43 #include "x86_64-gen.c"
  44 #include "x86_64-link.c"
  45 #include "i386-asm.c"
  46 #elif defined(TCC_TARGET_RISCV64)
  47 #include "riscv64-gen.c"
  48 #include "riscv64-link.c"
  49 #include "riscv64-asm.c"
  50 #else
  51 #error unknown target
  52 #endif
  53 #ifdef CONFIG_TCC_ASM
  54 #include "tccasm.c"
  55 #endif
  56 #ifdef TCC_TARGET_PE
  57 #include "tccpe.c"
  58 #endif
  59 #ifdef TCC_TARGET_MACHO
  60 #include "tccmacho.c"
  61 #endif
  62 #endif /* ONE_SOURCE */
  63
  64 #include "tcc.h"
  65
  66 /********************************************************/
  67 /* global variables */
  68
  69 /* XXX: get rid of this ASAP (or maybe not) */
  70 ST_DATA struct TCCState *tcc_state;
  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 static HMODULE tcc_module;
  88
  89 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  90 static void tcc_set_lib_path_w32(TCCState *s)
  91 {
  92     char path[1024], *p;
  93     GetModuleFileNameA(tcc_module, path, sizeof path);
  94     p = tcc_basename(normalize_slashes(strlwr(path)));
  95     if (p > path)
  96         --p;
  97     *p = 0;
  98     tcc_set_lib_path(s, path);
  99 }
 100
 101 #ifdef TCC_TARGET_PE
 102 static void tcc_add_systemdir(TCCState *s)
 103 {
 104     char buf[1000];
 105     GetSystemDirectory(buf, sizeof buf);
 106     tcc_add_library_path(s, normalize_slashes(buf));
 107 }
 108 #endif
 109
 110 #ifdef LIBTCC_AS_DLL
 111 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 112 {
 113     if (DLL_PROCESS_ATTACH == dwReason)
 114         tcc_module = hDll;
 115     return TRUE;
 116 }
 117 #endif
 118 #endif
 119
 120 /********************************************************/
 121 #if CONFIG_TCC_SEMLOCK == 0
 122 #define WAIT_SEM()
 123 #define POST_SEM()
 124 #elif defined _WIN32
 125 static int tcc_sem_init;
 126 static CRITICAL_SECTION tcc_cr;
 127 static void wait_sem(void)
 128 {
 129     if (!tcc_sem_init)
 130         InitializeCriticalSection(&tcc_cr), tcc_sem_init = 1;
 131     EnterCriticalSection(&tcc_cr);
 132 }
 133 #define WAIT_SEM() wait_sem()
 134 #define POST_SEM() LeaveCriticalSection(&tcc_cr);
 135 #elif defined __APPLE__
 136 /* Half-compatible MacOS doesn't have non-shared (process local)
 137    semaphores.  Use the dispatch framework for lightweight locks.  */
 138 #include <dispatch/dispatch.h>
 139 static int tcc_sem_init;
 140 static dispatch_semaphore_t tcc_sem;
 141 static void wait_sem(void)
 142 {
 143     if (!tcc_sem_init)
 144       tcc_sem = dispatch_semaphore_create(1), tcc_sem_init = 1;
 145     dispatch_semaphore_wait(tcc_sem, DISPATCH_TIME_FOREVER);
 146 }
 147 #define WAIT_SEM() wait_sem()
 148 #define POST_SEM() dispatch_semaphore_signal(tcc_sem)
 149 #else
 150 #include <semaphore.h>
 151 static int tcc_sem_init;
 152 static sem_t tcc_sem;
 153 static void wait_sem(void)
 154 {
 155     if (!tcc_sem_init)
 156         sem_init(&tcc_sem, 0, 1), tcc_sem_init = 1;
 157     while (sem_wait (&tcc_sem) < 0 && errno == EINTR);
 158 }
 159 #define WAIT_SEM() wait_sem()
 160 #define POST_SEM() sem_post(&tcc_sem)
 161 #endif
 162
 163 /********************************************************/
 164 /* copy a string and truncate it. */
 165 ST_FUNC char *pstrcpy(char *buf, size_t buf_size, const char *s)
 166 {
 167     char *q, *q_end;
 168     int c;
 169
 170     if (buf_size > 0) {
 171         q = buf;
 172         q_end = buf + buf_size - 1;
 173         while (q < q_end) {
 174             c = *s++;
 175             if (c == '\0')
 176                 break;
 177             *q++ = c;
 178         }
 179         *q = '\0';
 180     }
 181     return buf;
 182 }
 183
 184 /* strcat and truncate. */
 185 ST_FUNC char *pstrcat(char *buf, size_t buf_size, const char *s)
 186 {
 187     size_t len;
 188     len = strlen(buf);
 189     if (len < buf_size)
 190         pstrcpy(buf + len, buf_size - len, s);
 191     return buf;
 192 }
 193
 194 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 195 {
 196     memcpy(out, in, num);
 197     out[num] = '\0';
 198     return out;
 199 }
 200
 201 /* extract the basename of a file */
 202 PUB_FUNC char *tcc_basename(const char *name)
 203 {
 204     char *p = strchr(name, 0);
 205     while (p > name && !IS_DIRSEP(p[-1]))
 206         --p;
 207     return p;
 208 }
 209
 210 /* extract extension part of a file
 211  *
 212  * (if no extension, return pointer to end-of-string)
 213  */
 214 PUB_FUNC char *tcc_fileextension (const char *name)
 215 {
 216     char *b = tcc_basename(name);
 217     char *e = strrchr(b, '.');
 218     return e ? e : strchr(b, 0);
 219 }
 220
 221 /********************************************************/
 222 /* memory management */
 223
 224 #undef free
 225 #undef malloc
 226 #undef realloc
 227
 228 #ifndef MEM_DEBUG
 229
 230 PUB_FUNC void tcc_free(void *ptr)
 231 {
 232     free(ptr);
 233 }
 234
 235 PUB_FUNC void *tcc_malloc(unsigned long size)
 236 {
 237     void *ptr;
 238     ptr = malloc(size);
 239     if (!ptr && size)
 240         _tcc_error("memory full (malloc)");
 241     return ptr;
 242 }
 243
 244 PUB_FUNC void *tcc_mallocz(unsigned long size)
 245 {
 246     void *ptr;
 247     ptr = tcc_malloc(size);
 248     if (size)
 249         memset(ptr, 0, size);
 250     return ptr;
 251 }
 252
 253 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 254 {
 255     void *ptr1;
 256     ptr1 = realloc(ptr, size);
 257     if (!ptr1 && size)
 258         _tcc_error("memory full (realloc)");
 259     return ptr1;
 260 }
 261
 262 PUB_FUNC char *tcc_strdup(const char *str)
 263 {
 264     char *ptr;
 265     ptr = tcc_malloc(strlen(str) + 1);
 266     strcpy(ptr, str);
 267     return ptr;
 268 }
 269
 270 #else
 271
 272 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 273 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 274 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 275 #define MEM_DEBUG_FILE_LEN 40
 276 #define MEM_DEBUG_CHECK3(header) \
 277     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 278 #define MEM_USER_PTR(header) \
 279     ((char *)header + offsetof(mem_debug_header_t, magic3))
 280 #define MEM_HEADER_PTR(ptr) \
 281     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 282
 283 struct mem_debug_header {
 284     unsigned magic1;
 285     unsigned size;
 286     struct mem_debug_header *prev;
 287     struct mem_debug_header *next;
 288     int line_num;
 289     char file_name[MEM_DEBUG_FILE_LEN + 1];
 290     unsigned magic2;
 291     ALIGNED(16) unsigned char magic3[4];
 292 };
 293
 294 typedef struct mem_debug_header mem_debug_header_t;
 295
 296 static mem_debug_header_t *mem_debug_chain;
 297 static unsigned mem_cur_size;
 298 static unsigned mem_max_size;
 299
 300 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 301 {
 302     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 303     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 304         header->magic2 != MEM_DEBUG_MAGIC2 ||
 305         read32le(MEM_DEBUG_CHECK3(header)) != MEM_DEBUG_MAGIC3 ||
 306         header->size == (unsigned)-1) {
 307         fprintf(stderr, "%s check failed\n", msg);
 308         if (header->magic1 == MEM_DEBUG_MAGIC1)
 309             fprintf(stderr, "%s:%u: block allocated here.\n",
 310                 header->file_name, header->line_num);
 311         exit(1);
 312     }
 313     return header;
 314 }
 315
 316 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 317 {
 318     int ofs;
 319     mem_debug_header_t *header;
 320
 321     header = malloc(sizeof(mem_debug_header_t) + size);
 322     if (!header)
 323         _tcc_error("memory full (malloc)");
 324
 325     header->magic1 = MEM_DEBUG_MAGIC1;
 326     header->magic2 = MEM_DEBUG_MAGIC2;
 327     header->size = size;
 328     write32le(MEM_DEBUG_CHECK3(header), MEM_DEBUG_MAGIC3);
 329     header->line_num = line;
 330     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 331     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 332     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 333
 334     header->next = mem_debug_chain;
 335     header->prev = NULL;
 336     if (header->next)
 337         header->next->prev = header;
 338     mem_debug_chain = header;
 339
 340     mem_cur_size += size;
 341     if (mem_cur_size > mem_max_size)
 342         mem_max_size = mem_cur_size;
 343
 344     return MEM_USER_PTR(header);
 345 }
 346
 347 PUB_FUNC void tcc_free_debug(void *ptr)
 348 {
 349     mem_debug_header_t *header;
 350     if (!ptr)
 351         return;
 352     header = malloc_check(ptr, "tcc_free");
 353     mem_cur_size -= header->size;
 354     header->size = (unsigned)-1;
 355     if (header->next)
 356         header->next->prev = header->prev;
 357     if (header->prev)
 358         header->prev->next = header->next;
 359     if (header == mem_debug_chain)
 360         mem_debug_chain = header->next;
 361     free(header);
 362 }
 363
 364 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 365 {
 366     void *ptr;
 367     ptr = tcc_malloc_debug(size,file,line);
 368     memset(ptr, 0, size);
 369     return ptr;
 370 }
 371
 372 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 373 {
 374     mem_debug_header_t *header;
 375     int mem_debug_chain_update = 0;
 376     if (!ptr)
 377         return tcc_malloc_debug(size, file, line);
 378     header = malloc_check(ptr, "tcc_realloc");
 379     mem_cur_size -= header->size;
 380     mem_debug_chain_update = (header == mem_debug_chain);
 381     header = realloc(header, sizeof(mem_debug_header_t) + size);
 382     if (!header)
 383         _tcc_error("memory full (realloc)");
 384     header->size = size;
 385     write32le(MEM_DEBUG_CHECK3(header), MEM_DEBUG_MAGIC3);
 386     if (header->next)
 387         header->next->prev = header;
 388     if (header->prev)
 389         header->prev->next = header;
 390     if (mem_debug_chain_update)
 391         mem_debug_chain = header;
 392     mem_cur_size += size;
 393     if (mem_cur_size > mem_max_size)
 394         mem_max_size = mem_cur_size;
 395     return MEM_USER_PTR(header);
 396 }
 397
 398 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 399 {
 400     char *ptr;
 401     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 402     strcpy(ptr, str);
 403     return ptr;
 404 }
 405
 406 PUB_FUNC void tcc_memcheck(void)
 407 {
 408     if (mem_cur_size) {
 409         mem_debug_header_t *header = mem_debug_chain;
 410         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 411             mem_cur_size, mem_max_size);
 412         while (header) {
 413             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 414                 header->file_name, header->line_num, header->size);
 415             header = header->next;
 416         }
 417 #if MEM_DEBUG-0 == 2
 418         exit(2);
 419 #endif
 420     }
 421 }
 422 #endif /* MEM_DEBUG */
 423
 424 #define free(p) use_tcc_free(p)
 425 #define malloc(s) use_tcc_malloc(s)
 426 #define realloc(p, s) use_tcc_realloc(p, s)
 427
 428 /********************************************************/
 429 /* dynarrays */
 430
 431 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 432 {
 433     int nb, nb_alloc;
 434     void **pp;
 435
 436     nb = *nb_ptr;
 437     pp = *(void ***)ptab;
 438     /* every power of two we double array size */
 439     if ((nb & (nb - 1)) == 0) {
 440         if (!nb)
 441             nb_alloc = 1;
 442         else
 443             nb_alloc = nb * 2;
 444         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 445         *(void***)ptab = pp;
 446     }
 447     pp[nb++] = data;
 448     *nb_ptr = nb;
 449 }
 450
 451 ST_FUNC void dynarray_reset(void *pp, int *n)
 452 {
 453     void **p;
 454     for (p = *(void***)pp; *n; ++p, --*n)
 455         if (*p)
 456             tcc_free(*p);
 457     tcc_free(*(void**)pp);
 458     *(void**)pp = NULL;
 459 }
 460
 461 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 462 {
 463     const char *p;
 464     do {
 465         int c;
 466         CString str;
 467
 468         cstr_new(&str);
 469         for (p = in; c = *p, c != '\0' && c != PATHSEP[0]; ++p) {
 470             if (c == '{' && p[1] && p[2] == '}') {
 471                 c = p[1], p += 2;
 472                 if (c == 'B')
 473                     cstr_cat(&str, s->tcc_lib_path, -1);
 474                 if (c == 'f' && file) {
 475                     /* substitute current file's dir */
 476                     const char *f = file->true_filename;
 477                     const char *b = tcc_basename(f);
 478                     if (b > f)
 479                         cstr_cat(&str, f, b - f - 1);
 480                     else
 481                         cstr_cat(&str, ".", 1);
 482                 }
 483             } else {
 484                 cstr_ccat(&str, c);
 485             }
 486         }
 487         if (str.size) {
 488             cstr_ccat(&str, '\0');
 489             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 490         }
 491         cstr_free(&str);
 492         in = p+1;
 493     } while (*p);
 494 }
 495
 496 /********************************************************/
 497
 498 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 499 {
 500     int len;
 501     len = strlen(buf);
 502     vsnprintf(buf + len, buf_size - len, fmt, ap);
 503 }
 504
 505 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 506 {
 507     va_list ap;
 508     va_start(ap, fmt);
 509     strcat_vprintf(buf, buf_size, fmt, ap);
 510     va_end(ap);
 511 }
 512
 513 #define ERROR_WARN 0
 514 #define ERROR_NOABORT 1
 515 #define ERROR_ERROR 2
 516
 517 PUB_FUNC void tcc_enter_state(TCCState *s1)
 518 {
 519     WAIT_SEM();
 520     tcc_state = s1;
 521 }
 522
 523 PUB_FUNC void tcc_exit_state(void)
 524 {
 525     tcc_state = NULL;
 526     POST_SEM();
 527 }
 528
 529 static void error1(int mode, const char *fmt, va_list ap)
 530 {
 531     char buf[2048];
 532     BufferedFile **pf, *f;
 533     TCCState *s1 = tcc_state;
 534
 535     buf[0] = '\0';
 536     if (s1 == NULL)
 537         /* can happen only if called from tcc_malloc(): 'out of memory' */
 538         goto no_file;
 539
 540     if (s1 && !s1->error_set_jmp_enabled)
 541         /* tcc_state just was set by tcc_enter_state() */
 542         tcc_exit_state();
 543
 544     if (mode == ERROR_WARN) {
 545         if (s1->warn_none)
 546             return;
 547         if (s1->warn_error)
 548             mode = ERROR_ERROR;
 549     }
 550
 551     f = NULL;
 552     if (s1->error_set_jmp_enabled) { /* we're called while parsing a file */
 553         /* use upper file if inline ":asm:" or token ":paste:" */
 554         for (f = file; f && f->filename[0] == ':'; f = f->prev)
 555             ;
 556     }
 557     if (f) {
 558         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 559             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 560                 (*pf)->filename, (*pf)->line_num);
 561         strcat_printf(buf, sizeof(buf), "%s:%d: ",
 562             f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 563     } else if (s1->current_filename) {
 564         strcat_printf(buf, sizeof(buf), "%s: ", s1->current_filename);
 565     }
 566
 567 no_file:
 568     if (0 == buf[0])
 569         strcat_printf(buf, sizeof(buf), "tcc: ");
 570     if (mode == ERROR_WARN)
 571         strcat_printf(buf, sizeof(buf), "warning: ");
 572     else
 573         strcat_printf(buf, sizeof(buf), "error: ");
 574     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 575     if (!s1 || !s1->error_func) {
 576         /* default case: stderr */
 577         if (s1 && s1->output_type == TCC_OUTPUT_PREPROCESS && s1->ppfp == stdout)
 578             /* print a newline during tcc -E */
 579             printf("\n"), fflush(stdout);
 580         fflush(stdout); /* flush -v output */
 581         fprintf(stderr, "%s\n", buf);
 582         fflush(stderr); /* print error/warning now (win32) */
 583     } else {
 584         s1->error_func(s1->error_opaque, buf);
 585     }
 586     if (s1) {
 587         if (mode != ERROR_WARN)
 588             s1->nb_errors++;
 589         if (mode != ERROR_ERROR)
 590             return;
 591         if (s1->error_set_jmp_enabled)
 592             longjmp(s1->error_jmp_buf, 1);
 593     }
 594     exit(1);
 595 }
 596
 597 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque, TCCErrorFunc error_func)
 598 {
 599     s->error_opaque = error_opaque;
 600     s->error_func = error_func;
 601 }
 602
 603 LIBTCCAPI TCCErrorFunc tcc_get_error_func(TCCState *s)
 604 {
 605     return s->error_func;
 606 }
 607
 608 LIBTCCAPI void *tcc_get_error_opaque(TCCState *s)
 609 {
 610     return s->error_opaque;
 611 }
 612
 613 /* error without aborting current compilation */
 614 PUB_FUNC void _tcc_error_noabort(const char *fmt, ...)
 615 {
 616     va_list ap;
 617     va_start(ap, fmt);
 618     error1(ERROR_NOABORT, fmt, ap);
 619     va_end(ap);
 620 }
 621
 622 PUB_FUNC void _tcc_error(const char *fmt, ...)
 623 {
 624     va_list ap;
 625     va_start(ap, fmt);
 626     for (;;) error1(ERROR_ERROR, fmt, ap);
 627 }
 628
 629 PUB_FUNC void _tcc_warning(const char *fmt, ...)
 630 {
 631     va_list ap;
 632     va_start(ap, fmt);
 633     error1(ERROR_WARN, fmt, ap);
 634     va_end(ap);
 635 }
 636
 637 /********************************************************/
 638 /* I/O layer */
 639
 640 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 641 {
 642     BufferedFile *bf;
 643     int buflen = initlen ? initlen : IO_BUF_SIZE;
 644
 645     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 646     bf->buf_ptr = bf->buffer;
 647     bf->buf_end = bf->buffer + initlen;
 648     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 649     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 650 #ifdef _WIN32
 651     normalize_slashes(bf->filename);
 652 #endif
 653     bf->true_filename = bf->filename;
 654     bf->line_num = 1;
 655     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 656     bf->fd = -1;
 657     bf->prev = file;
 658     file = bf;
 659     tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 660 }
 661
 662 ST_FUNC void tcc_close(void)
 663 {
 664     TCCState *s1 = tcc_state;
 665     BufferedFile *bf = file;
 666     if (bf->fd > 0) {
 667         close(bf->fd);
 668         total_lines += bf->line_num;
 669     }
 670     if (bf->true_filename != bf->filename)
 671         tcc_free(bf->true_filename);
 672     file = bf->prev;
 673     tcc_free(bf);
 674 }
 675
 676 static int _tcc_open(TCCState *s1, const char *filename)
 677 {
 678     int fd;
 679     if (strcmp(filename, "-") == 0)
 680         fd = 0, filename = "<stdin>";
 681     else
 682         fd = open(filename, O_RDONLY | O_BINARY);
 683     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 684         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 685                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 686     return fd;
 687 }
 688
 689 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 690 {
 691     int fd = _tcc_open(s1, filename);
 692     if (fd < 0)
 693         return -1;
 694     tcc_open_bf(s1, filename, 0);
 695     file->fd = fd;
 696     return 0;
 697 }
 698
 699 /* compile the file opened in 'file'. Return non zero if errors. */
 700 static int tcc_compile(TCCState *s1, int filetype, const char *str, int fd)
 701 {
 702     /* Here we enter the code section where we use the global variables for
 703        parsing and code generation (tccpp.c, tccgen.c, <target>-gen.c).
 704        Other threads need to wait until we're done.
 705
 706        Alternatively we could use thread local storage for those global
 707        variables, which may or may not have advantages */
 708
 709     tcc_enter_state(s1);
 710
 711     if (setjmp(s1->error_jmp_buf) == 0) {
 712         s1->error_set_jmp_enabled = 1;
 713         s1->nb_errors = 0;
 714
 715         if (fd == -1) {
 716             int len = strlen(str);
 717             tcc_open_bf(s1, "<string>", len);
 718             memcpy(file->buffer, str, len);
 719         } else {
 720             tcc_open_bf(s1, str, 0);
 721             file->fd = fd;
 722         }
 723
 724         tccelf_begin_file(s1);
 725         preprocess_start(s1, filetype);
 726         tccgen_init(s1);
 727         if (s1->output_type == TCC_OUTPUT_PREPROCESS) {
 728             tcc_preprocess(s1);
 729         } else if (filetype & (AFF_TYPE_ASM | AFF_TYPE_ASMPP)) {
 730 #ifdef CONFIG_TCC_ASM
 731             tcc_assemble(s1, !!(filetype & AFF_TYPE_ASMPP));
 732 #else
 733             tcc_error_noabort("asm not supported");
 734 #endif
 735         } else {
 736             tccgen_compile(s1);
 737         }
 738     }
 739     s1->error_set_jmp_enabled = 0;
 740     tccgen_finish(s1);
 741     preprocess_end(s1);
 742     tcc_exit_state();
 743
 744     tccelf_end_file(s1);
 745     return s1->nb_errors != 0 ? -1 : 0;
 746 }
 747
 748 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 749 {
 750     return tcc_compile(s, s->filetype, str, -1);
 751 }
 752
 753 /* define a preprocessor symbol. value can be NULL, sym can be "sym=val" */
 754 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 755 {
 756     const char *eq;
 757     if (NULL == (eq = strchr(sym, '=')))
 758         eq = strchr(sym, 0);
 759     if (NULL == value)
 760         value = *eq ? eq + 1 : "1";
 761     cstr_printf(&s1->cmdline_defs, "#define %.*s %s\n", (int)(eq-sym), sym, value);
 762 }
 763
 764 /* undefine a preprocessor symbol */
 765 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 766 {
 767     cstr_printf(&s1->cmdline_defs, "#undef %s\n", sym);
 768 }
 769
 770
 771 LIBTCCAPI TCCState *tcc_new(void)
 772 {
 773     TCCState *s;
 774
 775     s = tcc_mallocz(sizeof(TCCState));
 776     if (!s)
 777         return NULL;
 778 #ifdef MEM_DEBUG
 779     ++nb_states;
 780 #endif
 781
 782 #undef gnu_ext
 783
 784     s->gnu_ext = 1;
 785     s->tcc_ext = 1;
 786     s->nocommon = 1;
 787     s->dollars_in_identifiers = 1; /*on by default like in gcc/clang*/
 788     s->cversion = 199901; /* default unless -std=c11 is supplied */
 789     s->warn_implicit_function_declaration = 1;
 790     s->ms_extensions = 1;
 791
 792 #ifdef CHAR_IS_UNSIGNED
 793     s->char_is_unsigned = 1;
 794 #endif
 795 #ifdef TCC_TARGET_I386
 796     s->seg_size = 32;
 797 #endif
 798     /* enable this if you want symbols with leading underscore on windows: */
 799 #if defined TCC_TARGET_MACHO /* || defined TCC_TARGET_PE */
 800     s->leading_underscore = 1;
 801 #endif
 802 #ifdef TCC_TARGET_ARM
 803     s->float_abi = ARM_FLOAT_ABI;
 804 #endif
 805
 806     s->ppfp = stdout;
 807     /* might be used in error() before preprocess_start() */
 808     s->include_stack_ptr = s->include_stack;
 809
 810     tccelf_new(s);
 811
 812 #ifdef _WIN32
 813     tcc_set_lib_path_w32(s);
 814 #else
 815     tcc_set_lib_path(s, CONFIG_TCCDIR);
 816 #endif
 817     return s;
 818 }
 819
 820 LIBTCCAPI void tcc_delete(TCCState *s1)
 821 {
 822     /* free sections */
 823     tccelf_delete(s1);
 824
 825     /* free library paths */
 826     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 827     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 828
 829     /* free include paths */
 830     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 831     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 832
 833     tcc_free(s1->tcc_lib_path);
 834     tcc_free(s1->soname);
 835     tcc_free(s1->rpath);
 836     tcc_free(s1->init_symbol);
 837     tcc_free(s1->fini_symbol);
 838     tcc_free(s1->outfile);
 839     tcc_free(s1->deps_outfile);
 840     dynarray_reset(&s1->files, &s1->nb_files);
 841     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 842     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 843     dynarray_reset(&s1->argv, &s1->argc);
 844     cstr_free(&s1->cmdline_defs);
 845     cstr_free(&s1->cmdline_incl);
 846 #ifdef TCC_IS_NATIVE
 847     /* free runtime memory */
 848     tcc_run_free(s1);
 849 #endif
 850
 851     tcc_free(s1);
 852 #ifdef MEM_DEBUG
 853     if (0 == --nb_states)
 854         tcc_memcheck();
 855 #endif
 856 }
 857
 858 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 859 {
 860     s->output_type = output_type;
 861
 862     /* always elf for objects */
 863     if (output_type == TCC_OUTPUT_OBJ)
 864         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 865
 866     if (!s->nostdinc) {
 867         /* default include paths */
 868         /* -isystem paths have already been handled */
 869         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 870     }
 871
 872 #ifdef CONFIG_TCC_BCHECK
 873     if (s->do_bounds_check) {
 874         /* if bound checking, then add corresponding sections */
 875         tccelf_bounds_new(s);
 876     }
 877 #endif
 878     if (s->do_debug) {
 879         /* add debug sections */
 880         tccelf_stab_new(s);
 881     }
 882
 883     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 884
 885 #ifdef TCC_TARGET_PE
 886 # ifdef _WIN32
 887     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
 888         tcc_add_systemdir(s);
 889 # endif
 890 #else
 891     /* paths for crt objects */
 892     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 893     /* add libc crt1/crti objects */
 894     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
 895         !s->nostdlib) {
 896 #if TARGETOS_OpenBSD
 897         if (output_type != TCC_OUTPUT_DLL)
 898             tcc_add_crt(s, "crt0.o");
 899         if (output_type == TCC_OUTPUT_DLL)
 900             tcc_add_crt(s, "crtbeginS.o");
 901         else
 902             tcc_add_crt(s, "crtbegin.o");
 903 #elif TARGETOS_FreeBSD
 904         if (output_type != TCC_OUTPUT_DLL)
 905             tcc_add_crt(s, "crt1.o");
 906         tcc_add_crt(s, "crti.o");
 907         if (s->static_link)
 908             tcc_add_crt(s, "crtbeginT.o");
 909         else if (output_type == TCC_OUTPUT_DLL)
 910             tcc_add_crt(s, "crtbeginS.o");
 911         else
 912             tcc_add_crt(s, "crtbegin.o");
 913 #elif TARGETOS_NetBSD
 914         if (output_type != TCC_OUTPUT_DLL)
 915             tcc_add_crt(s, "crt0.o");
 916         tcc_add_crt(s, "crti.o");
 917         if (s->static_link)
 918             tcc_add_crt(s, "crtbeginT.o");
 919         else if (output_type == TCC_OUTPUT_DLL)
 920             tcc_add_crt(s, "crtbeginS.o");
 921         else
 922             tcc_add_crt(s, "crtbegin.o");
 923 #elif TCC_TARGET_MACHO
 924         /* Mach-O with LC_MAIN doesn't need any crt startup code.  */
 925 #else
 926         if (output_type != TCC_OUTPUT_DLL)
 927             tcc_add_crt(s, "crt1.o");
 928         tcc_add_crt(s, "crti.o");
 929 #endif
 930     }
 931 #endif
 932     return 0;
 933 }
 934
 935 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 936 {
 937     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
 938     return 0;
 939 }
 940
 941 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
 942 {
 943     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
 944     return 0;
 945 }
 946
 947 #if !defined TCC_TARGET_MACHO || defined TCC_IS_NATIVE
 948 ST_FUNC DLLReference *tcc_add_dllref(TCCState *s1, const char *dllname)
 949 {
 950     DLLReference *ref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
 951     strcpy(ref->name, dllname);
 952     dynarray_add(&s1->loaded_dlls, &s1->nb_loaded_dlls, ref);
 953     return ref;
 954 }
 955 #endif
 956
 957 /* OpenBSD: choose latest from libxxx.so.x.y versions */
 958 #if defined TARGETOS_OpenBSD && !defined _WIN32
 959 #include <glob.h>
 960 static int tcc_glob_so(TCCState *s1, const char *pattern, char *buf, int size)
 961 {
 962     const char *star;
 963     glob_t g;
 964     char *p;
 965     int i, v, v1, v2, v3;
 966
 967     star = strchr(pattern, '*');
 968     if (!star || glob(pattern, 0, NULL, &g))
 969         return -1;
 970     for (v = -1, i = 0; i < g.gl_pathc; ++i) {
 971         p = g.gl_pathv[i];
 972         if (2 != sscanf(p + (star - pattern), "%d.%d.%d", &v1, &v2, &v3))
 973             continue;
 974         if ((v1 = v1 * 1000 + v2) > v)
 975             v = v1, pstrcpy(buf, size, p);
 976     }
 977     globfree(&g);
 978     return v;
 979 }
 980 #endif
 981
 982 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
 983 {
 984     int fd, ret = -1;
 985
 986 #if defined TARGETOS_OpenBSD && !defined _WIN32
 987     char buf[1024];
 988     if (tcc_glob_so(s1, filename, buf, sizeof buf) >= 0)
 989         filename = buf;
 990 #endif
 991
 992     /* open the file */
 993     fd = _tcc_open(s1, filename);
 994     if (fd < 0) {
 995         if (flags & AFF_PRINT_ERROR)
 996             tcc_error_noabort("file '%s' not found", filename);
 997         return ret;
 998     }
 999
1000     s1->current_filename = filename;
1001     if (flags & AFF_TYPE_BIN) {
1002         ElfW(Ehdr) ehdr;
1003         int obj_type;
1004
1005         obj_type = tcc_object_type(fd, &ehdr);
1006         lseek(fd, 0, SEEK_SET);
1007
1008 #ifdef TCC_TARGET_MACHO
1009         if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), ".dylib"))
1010             obj_type = AFF_BINTYPE_DYN;
1011 #endif
1012
1013         switch (obj_type) {
1014
1015         case AFF_BINTYPE_REL:
1016             ret = tcc_load_object_file(s1, fd, 0);
1017             break;
1018
1019         case AFF_BINTYPE_AR:
1020             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1021             break;
1022
1023 #ifdef TCC_TARGET_PE
1024         default:
1025             ret = pe_load_file(s1, fd, filename);
1026 #else
1027         case AFF_BINTYPE_DYN:
1028             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1029 #ifdef TCC_IS_NATIVE
1030                 void *dl = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1031                 if (dl) {
1032                     tcc_add_dllref(s1, filename)->handle = dl;
1033                     ret = 0;
1034                 }
1035 #endif
1036                 break;
1037             }
1038 #ifdef TCC_TARGET_MACHO
1039             ret = macho_load_dll(s1, fd, filename,
1040                                  (flags & AFF_REFERENCED_DLL) != 0);
1041 #else
1042             ret = tcc_load_dll(s1, fd, filename,
1043                                (flags & AFF_REFERENCED_DLL) != 0);
1044 #endif
1045             break;
1046
1047 #ifdef TCC_TARGET_COFF
1048         case AFF_BINTYPE_C67:
1049             ret = tcc_load_coff(s1, fd);
1050             break;
1051 #endif
1052         default:
1053 #ifndef TCC_TARGET_MACHO
1054             /* as GNU ld, consider it is an ld script if not recognized */
1055             ret = tcc_load_ldscript(s1, fd);
1056 #endif
1057
1058 #endif /* !TCC_TARGET_PE */
1059             if (ret < 0)
1060                 tcc_error_noabort("%s: unrecognized file type", filename);
1061             break;
1062         }
1063         close(fd);
1064     } else {
1065         /* update target deps */
1066         dynarray_add(&s1->target_deps, &s1->nb_target_deps, tcc_strdup(filename));
1067         ret = tcc_compile(s1, flags, filename, fd);
1068     }
1069     s1->current_filename = NULL;
1070     return ret;
1071 }
1072
1073 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1074 {
1075     int filetype = s->filetype;
1076     if (0 == (filetype & AFF_TYPE_MASK)) {
1077         /* use a file extension to detect a filetype */
1078         const char *ext = tcc_fileextension(filename);
1079         if (ext[0]) {
1080             ext++;
1081             if (!strcmp(ext, "S"))
1082                 filetype = AFF_TYPE_ASMPP;
1083             else if (!strcmp(ext, "s"))
1084                 filetype = AFF_TYPE_ASM;
1085             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1086                 filetype = AFF_TYPE_C;
1087             else
1088                 filetype |= AFF_TYPE_BIN;
1089         } else {
1090             filetype = AFF_TYPE_C;
1091         }
1092     }
1093     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1094 }
1095
1096 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1097 {
1098     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1099     return 0;
1100 }
1101
1102 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1103     const char *filename, int flags, char **paths, int nb_paths)
1104 {
1105     char buf[1024];
1106     int i;
1107
1108     for(i = 0; i < nb_paths; i++) {
1109         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1110         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1111             return 0;
1112     }
1113     return -1;
1114 }
1115
1116 #ifndef TCC_TARGET_MACHO
1117 /* find and load a dll. Return non zero if not found */
1118 /* XXX: add '-rpath' option support ? */
1119 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1120 {
1121     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1122         s->library_paths, s->nb_library_paths);
1123 }
1124 #endif
1125
1126 #if !defined TCC_TARGET_PE && !defined TCC_TARGET_MACHO
1127 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)
1128 {
1129     if (-1 == tcc_add_library_internal(s1, "%s/%s",
1130         filename, 0, s1->crt_paths, s1->nb_crt_paths))
1131         tcc_error_noabort("file '%s' not found", filename);
1132     return 0;
1133 }
1134 #endif
1135
1136 /* the library name is the same as the argument of the '-l' option */
1137 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1138 {
1139 #if defined TCC_TARGET_PE
1140     static const char * const libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1141     const char * const *pp = s->static_link ? libs + 4 : libs;
1142 #elif defined TCC_TARGET_MACHO
1143     static const char * const libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
1144     const char * const *pp = s->static_link ? libs + 1 : libs;
1145 #elif defined TARGETOS_OpenBSD
1146     static const char * const libs[] = { "%s/lib%s.so.*", "%s/lib%s.a", NULL };
1147     const char * const *pp = s->static_link ? libs + 1 : libs;
1148 #else
1149     static const char * const libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1150     const char * const *pp = s->static_link ? libs + 1 : libs;
1151 #endif
1152     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1153     while (*pp) {
1154         if (0 == tcc_add_library_internal(s, *pp,
1155             libraryname, flags, s->library_paths, s->nb_library_paths))
1156             return 0;
1157         ++pp;
1158     }
1159     return -1;
1160 }
1161
1162 PUB_FUNC int tcc_add_library_err(TCCState *s1, const char *libname)
1163 {
1164     int ret = tcc_add_library(s1, libname);
1165     if (ret < 0)
1166         tcc_error_noabort("library '%s' not found", libname);
1167     return ret;
1168 }
1169
1170 /* handle #pragma comment(lib,) */
1171 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1172 {
1173     int i;
1174     for (i = 0; i < s1->nb_pragma_libs; i++)
1175         tcc_add_library_err(s1, s1->pragma_libs[i]);
1176 }
1177
1178 LIBTCCAPI int tcc_add_symbol(TCCState *s1, const char *name, const void *val)
1179 {
1180 #ifdef TCC_TARGET_PE
1181     /* On x86_64 'val' might not be reachable with a 32bit offset.
1182        So it is handled here as if it were in a DLL. */
1183     pe_putimport(s1, 0, name, (uintptr_t)val);
1184 #else
1185     char buf[256];
1186     if (s1->leading_underscore) {
1187         buf[0] = '_';
1188         pstrcpy(buf + 1, sizeof(buf) - 1, name);
1189         name = buf;
1190     }
1191     set_global_sym(s1, name, NULL, (addr_t)(uintptr_t)val); /* NULL: SHN_ABS */
1192 #endif
1193     return 0;
1194 }
1195
1196 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1197 {
1198     tcc_free(s->tcc_lib_path);
1199     s->tcc_lib_path = tcc_strdup(path);
1200 }
1201
1202 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1203 #define FD_INVERT 0x0002 /* invert value before storing */
1204
1205 typedef struct FlagDef {
1206     uint16_t offset;
1207     uint16_t flags;
1208     const char *name;
1209 } FlagDef;
1210
1211 static int no_flag(const char **pp)
1212 {
1213     const char *p = *pp;
1214     if (*p != 'n' || *++p != 'o' || *++p != '-')
1215         return 0;
1216     *pp = p + 1;
1217     return 1;
1218 }
1219
1220 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1221 {
1222     int value, ret;
1223     const FlagDef *p;
1224     const char *r;
1225
1226     value = 1;
1227     r = name;
1228     if (no_flag(&r))
1229         value = 0;
1230
1231     for (ret = -1, p = flags; p->name; ++p) {
1232         if (ret) {
1233             if (strcmp(r, p->name))
1234                 continue;
1235         } else {
1236             if (0 == (p->flags & WD_ALL))
1237                 continue;
1238         }
1239         if (p->offset) {
1240             *((unsigned char *)s + p->offset) =
1241                 p->flags & FD_INVERT ? !value : value;
1242             if (ret)
1243                 return 0;
1244         } else {
1245             ret = 0;
1246         }
1247     }
1248     return ret;
1249 }
1250
1251 static int strstart(const char *val, const char **str)
1252 {
1253     const char *p, *q;
1254     p = *str;
1255     q = val;
1256     while (*q) {
1257         if (*p != *q)
1258             return 0;
1259         p++;
1260         q++;
1261     }
1262     *str = p;
1263     return 1;
1264 }
1265
1266 /* Like strstart, but automatically takes into account that ld options can
1267  *
1268  * - start with double or single dash (e.g. '--soname' or '-soname')
1269  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1270  *   or '-Wl,-soname=x.so')
1271  *
1272  * you provide `val` always in 'option[=]' form (no leading -)
1273  */
1274 static int link_option(const char *str, const char *val, const char **ptr)
1275 {
1276     const char *p, *q;
1277     int ret;
1278
1279     /* there should be 1 or 2 dashes */
1280     if (*str++ != '-')
1281         return 0;
1282     if (*str == '-')
1283         str++;
1284
1285     /* then str & val should match (potentially up to '=') */
1286     p = str;
1287     q = val;
1288
1289     ret = 1;
1290     if (q[0] == '?') {
1291         ++q;
1292         if (no_flag(&p))
1293             ret = -1;
1294     }
1295
1296     while (*q != '\0' && *q != '=') {
1297         if (*p != *q)
1298             return 0;
1299         p++;
1300         q++;
1301     }
1302
1303     /* '=' near eos means ',' or '=' is ok */
1304     if (*q == '=') {
1305         if (*p == 0)
1306             *ptr = p;
1307         if (*p != ',' && *p != '=')
1308             return 0;
1309         p++;
1310     } else if (*p) {
1311         return 0;
1312     }
1313     *ptr = p;
1314     return ret;
1315 }
1316
1317 static const char *skip_linker_arg(const char **str)
1318 {
1319     const char *s1 = *str;
1320     const char *s2 = strchr(s1, ',');
1321     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1322     return s2;
1323 }
1324
1325 static void copy_linker_arg(char **pp, const char *s, int sep)
1326 {
1327     const char *q = s;
1328     char *p = *pp;
1329     int l = 0;
1330     if (p && sep)
1331         p[l = strlen(p)] = sep, ++l;
1332     skip_linker_arg(&q);
1333     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1334 }
1335
1336 /* set linker options */
1337 static int tcc_set_linker(TCCState *s, const char *option)
1338 {
1339     TCCState *s1 = s;
1340     while (*option) {
1341
1342         const char *p = NULL;
1343         char *end = NULL;
1344         int ignoring = 0;
1345         int ret;
1346
1347         if (link_option(option, "Bsymbolic", &p)) {
1348             s->symbolic = 1;
1349         } else if (link_option(option, "nostdlib", &p)) {
1350             s->nostdlib = 1;
1351         } else if (link_option(option, "fini=", &p)) {
1352             copy_linker_arg(&s->fini_symbol, p, 0);
1353             ignoring = 1;
1354         } else if (link_option(option, "image-base=", &p)
1355                 || link_option(option, "Ttext=", &p)) {
1356             s->text_addr = strtoull(p, &end, 16);
1357             s->has_text_addr = 1;
1358         } else if (link_option(option, "init=", &p)) {
1359             copy_linker_arg(&s->init_symbol, p, 0);
1360             ignoring = 1;
1361         } else if (link_option(option, "oformat=", &p)) {
1362 #if defined(TCC_TARGET_PE)
1363             if (strstart("pe-", &p)) {
1364 #elif PTR_SIZE == 8
1365             if (strstart("elf64-", &p)) {
1366 #else
1367             if (strstart("elf32-", &p)) {
1368 #endif
1369                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1370             } else if (!strcmp(p, "binary")) {
1371                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1372 #ifdef TCC_TARGET_COFF
1373             } else if (!strcmp(p, "coff")) {
1374                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1375 #endif
1376             } else
1377                 goto err;
1378
1379         } else if (link_option(option, "as-needed", &p)) {
1380             ignoring = 1;
1381         } else if (link_option(option, "O", &p)) {
1382             ignoring = 1;
1383         } else if (link_option(option, "export-all-symbols", &p)) {
1384             s->rdynamic = 1;
1385         } else if (link_option(option, "export-dynamic", &p)) {
1386             s->rdynamic = 1;
1387         } else if (link_option(option, "rpath=", &p)) {
1388             copy_linker_arg(&s->rpath, p, ':');
1389         } else if (link_option(option, "enable-new-dtags", &p)) {
1390             s->enable_new_dtags = 1;
1391         } else if (link_option(option, "section-alignment=", &p)) {
1392             s->section_align = strtoul(p, &end, 16);
1393         } else if (link_option(option, "soname=", &p)) {
1394             copy_linker_arg(&s->soname, p, 0);
1395 #ifdef TCC_TARGET_PE
1396         } else if (link_option(option, "large-address-aware", &p)) {
1397             s->pe_characteristics |= 0x20;
1398         } else if (link_option(option, "file-alignment=", &p)) {
1399             s->pe_file_align = strtoul(p, &end, 16);
1400         } else if (link_option(option, "stack=", &p)) {
1401             s->pe_stack_size = strtoul(p, &end, 10);
1402         } else if (link_option(option, "subsystem=", &p)) {
1403 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1404             if (!strcmp(p, "native")) {
1405                 s->pe_subsystem = 1;
1406             } else if (!strcmp(p, "console")) {
1407                 s->pe_subsystem = 3;
1408             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1409                 s->pe_subsystem = 2;
1410             } else if (!strcmp(p, "posix")) {
1411                 s->pe_subsystem = 7;
1412             } else if (!strcmp(p, "efiapp")) {
1413                 s->pe_subsystem = 10;
1414             } else if (!strcmp(p, "efiboot")) {
1415                 s->pe_subsystem = 11;
1416             } else if (!strcmp(p, "efiruntime")) {
1417                 s->pe_subsystem = 12;
1418             } else if (!strcmp(p, "efirom")) {
1419                 s->pe_subsystem = 13;
1420 #elif defined(TCC_TARGET_ARM)
1421             if (!strcmp(p, "wince")) {
1422                 s->pe_subsystem = 9;
1423 #endif
1424             } else
1425                 goto err;
1426 #endif
1427         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1428             if (ret > 0)
1429                 s->filetype |= AFF_WHOLE_ARCHIVE;
1430             else
1431                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1432         } else if (link_option(option, "z=", &p)) {
1433             ignoring = 1;
1434         } else if (p) {
1435             return 0;
1436         } else {
1437     err:
1438             tcc_error("unsupported linker option '%s'", option);
1439         }
1440
1441         if (ignoring && s->warn_unsupported)
1442             tcc_warning("unsupported linker option '%s'", option);
1443
1444         option = skip_linker_arg(&p);
1445     }
1446     return 1;
1447 }
1448
1449 typedef struct TCCOption {
1450     const char *name;
1451     uint16_t index;
1452     uint16_t flags;
1453 } TCCOption;
1454
1455 enum {
1456     TCC_OPTION_HELP,
1457     TCC_OPTION_HELP2,
1458     TCC_OPTION_v,
1459     TCC_OPTION_I,
1460     TCC_OPTION_D,
1461     TCC_OPTION_U,
1462     TCC_OPTION_P,
1463     TCC_OPTION_L,
1464     TCC_OPTION_B,
1465     TCC_OPTION_l,
1466     TCC_OPTION_bench,
1467     TCC_OPTION_bt,
1468     TCC_OPTION_b,
1469     TCC_OPTION_ba,
1470     TCC_OPTION_g,
1471     TCC_OPTION_c,
1472     TCC_OPTION_dumpversion,
1473     TCC_OPTION_d,
1474     TCC_OPTION_static,
1475     TCC_OPTION_std,
1476     TCC_OPTION_shared,
1477     TCC_OPTION_soname,
1478     TCC_OPTION_o,
1479     TCC_OPTION_r,
1480     TCC_OPTION_s,
1481     TCC_OPTION_traditional,
1482     TCC_OPTION_Wl,
1483     TCC_OPTION_Wp,
1484     TCC_OPTION_W,
1485     TCC_OPTION_O,
1486     TCC_OPTION_mfloat_abi,
1487     TCC_OPTION_m,
1488     TCC_OPTION_f,
1489     TCC_OPTION_isystem,
1490     TCC_OPTION_iwithprefix,
1491     TCC_OPTION_include,
1492     TCC_OPTION_nostdinc,
1493     TCC_OPTION_nostdlib,
1494     TCC_OPTION_print_search_dirs,
1495     TCC_OPTION_rdynamic,
1496     TCC_OPTION_param,
1497     TCC_OPTION_pedantic,
1498     TCC_OPTION_pthread,
1499     TCC_OPTION_run,
1500     TCC_OPTION_w,
1501     TCC_OPTION_pipe,
1502     TCC_OPTION_E,
1503     TCC_OPTION_MD,
1504     TCC_OPTION_MF,
1505     TCC_OPTION_x,
1506     TCC_OPTION_ar,
1507     TCC_OPTION_impdef,
1508     TCC_OPTION_C
1509 };
1510
1511 #define TCC_OPTION_HAS_ARG 0x0001
1512 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1513
1514 static const TCCOption tcc_options[] = {
1515     { "h", TCC_OPTION_HELP, 0 },
1516     { "-help", TCC_OPTION_HELP, 0 },
1517     { "?", TCC_OPTION_HELP, 0 },
1518     { "hh", TCC_OPTION_HELP2, 0 },
1519     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1520     { "-version", TCC_OPTION_v, 0 }, /* handle as verbose, also prints version*/
1521     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1522     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1523     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1524     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1525     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1526     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1527     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1528     { "bench", TCC_OPTION_bench, 0 },
1529 #ifdef CONFIG_TCC_BACKTRACE
1530     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1531 #endif
1532 #ifdef CONFIG_TCC_BCHECK
1533     { "b", TCC_OPTION_b, 0 },
1534 #endif
1535     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1536     { "c", TCC_OPTION_c, 0 },
1537     { "dumpversion", TCC_OPTION_dumpversion, 0},
1538     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1539     { "static", TCC_OPTION_static, 0 },
1540     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1541     { "shared", TCC_OPTION_shared, 0 },
1542     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1543     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1544     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1545     { "pedantic", TCC_OPTION_pedantic, 0},
1546     { "pthread", TCC_OPTION_pthread, 0},
1547     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1548     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1549     { "r", TCC_OPTION_r, 0 },
1550     { "s", TCC_OPTION_s, 0 },
1551     { "traditional", TCC_OPTION_traditional, 0 },
1552     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1553     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1554     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1555     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1556 #ifdef TCC_TARGET_ARM
1557     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1558 #endif
1559     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1560     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1561     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1562     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1563     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1564     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1565     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1566     { "w", TCC_OPTION_w, 0 },
1567     { "pipe", TCC_OPTION_pipe, 0},
1568     { "E", TCC_OPTION_E, 0},
1569     { "MD", TCC_OPTION_MD, 0},
1570     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1571     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1572     { "ar", TCC_OPTION_ar, 0},
1573 #ifdef TCC_TARGET_PE
1574     { "impdef", TCC_OPTION_impdef, 0},
1575 #endif
1576     { "C", TCC_OPTION_C, 0},
1577     { NULL, 0, 0 },
1578 };
1579
1580 static const FlagDef options_W[] = {
1581     { 0, 0, "all" },
1582     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1583     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1584     { offsetof(TCCState, warn_error), 0, "error" },
1585     { offsetof(TCCState, warn_gcc_compat), 0, "gcc-compat" },
1586     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1587       "implicit-function-declaration" },
1588     { 0, 0, NULL }
1589 };
1590
1591 static const FlagDef options_f[] = {
1592     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1593     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1594     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1595     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1596     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1597     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1598     { offsetof(TCCState, test_coverage), 0, "test-coverage" },
1599     { 0, 0, NULL }
1600 };
1601
1602 static const FlagDef options_m[] = {
1603     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1604 #ifdef TCC_TARGET_X86_64
1605     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1606 #endif
1607     { 0, 0, NULL }
1608 };
1609
1610 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1611 {
1612     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1613     f->type = filetype;
1614     strcpy(f->name, filename);
1615     dynarray_add(&s->files, &s->nb_files, f);
1616 }
1617
1618 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1619 {
1620     int ret = 0, q, c;
1621     CString str;
1622     for(;;) {
1623         while (c = (unsigned char)*r, c && c <= ' ')
1624           ++r;
1625         if (c == 0)
1626             break;
1627         q = 0;
1628         cstr_new(&str);
1629         while (c = (unsigned char)*r, c) {
1630             ++r;
1631             if (c == '\\' && (*r == '"' || *r == '\\')) {
1632                 c = *r++;
1633             } else if (c == '"') {
1634                 q = !q;
1635                 continue;
1636             } else if (q == 0 && c <= ' ') {
1637                 break;
1638             }
1639             cstr_ccat(&str, c);
1640         }
1641         cstr_ccat(&str, 0);
1642         //printf("<%s>\n", str.data), fflush(stdout);
1643         dynarray_add(argv, argc, tcc_strdup(str.data));
1644         cstr_free(&str);
1645         ++ret;
1646     }
1647     return ret;
1648 }
1649
1650 /* read list file */
1651 static void args_parser_listfile(TCCState *s,
1652     const char *filename, int optind, int *pargc, char ***pargv)
1653 {
1654     TCCState *s1 = s;
1655     int fd, i;
1656     size_t len;
1657     char *p;
1658     int argc = 0;
1659     char **argv = NULL;
1660
1661     fd = open(filename, O_RDONLY | O_BINARY);
1662     if (fd < 0)
1663         tcc_error("listfile '%s' not found", filename);
1664
1665     len = lseek(fd, 0, SEEK_END);
1666     p = tcc_malloc(len + 1), p[len] = 0;
1667     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1668
1669     for (i = 0; i < *pargc; ++i)
1670         if (i == optind)
1671             args_parser_make_argv(p, &argc, &argv);
1672         else
1673             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1674
1675     tcc_free(p);
1676     dynarray_reset(&s->argv, &s->argc);
1677     *pargc = s->argc = argc, *pargv = s->argv = argv;
1678 }
1679
1680 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1681 {
1682     TCCState *s1 = s;
1683     const TCCOption *popt;
1684     const char *optarg, *r;
1685     const char *run = NULL;
1686     int x;
1687     CString linker_arg; /* collect -Wl options */
1688     int tool = 0, arg_start = 0, noaction = optind;
1689     char **argv = *pargv;
1690     int argc = *pargc;
1691
1692     cstr_new(&linker_arg);
1693
1694     while (optind < argc) {
1695         r = argv[optind];
1696         if (r[0] == '@' && r[1] != '\0') {
1697             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1698             continue;
1699         }
1700         optind++;
1701         if (tool) {
1702             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1703                 ++s->verbose;
1704             continue;
1705         }
1706 reparse:
1707         if (r[0] != '-' || r[1] == '\0') {
1708             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1709                 args_parser_add_file(s, r, s->filetype);
1710             if (run) {
1711                 tcc_set_options(s, run);
1712                 arg_start = optind - 1;
1713                 break;
1714             }
1715             continue;
1716         }
1717
1718         /* find option in table */
1719         for(popt = tcc_options; ; ++popt) {
1720             const char *p1 = popt->name;
1721             const char *r1 = r + 1;
1722             if (p1 == NULL)
1723                 tcc_error("invalid option -- '%s'", r);
1724             if (!strstart(p1, &r1))
1725                 continue;
1726             optarg = r1;
1727             if (popt->flags & TCC_OPTION_HAS_ARG) {
1728                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1729                     if (optind >= argc)
1730                 arg_err:
1731                         tcc_error("argument to '%s' is missing", r);
1732                     optarg = argv[optind++];
1733                 }
1734             } else if (*r1 != '\0')
1735                 continue;
1736             break;
1737         }
1738
1739         switch(popt->index) {
1740         case TCC_OPTION_HELP:
1741             x = OPT_HELP;
1742             goto extra_action;
1743         case TCC_OPTION_HELP2:
1744             x = OPT_HELP2;
1745             goto extra_action;
1746         case TCC_OPTION_I:
1747             tcc_add_include_path(s, optarg);
1748             break;
1749         case TCC_OPTION_D:
1750             tcc_define_symbol(s, optarg, NULL);
1751             break;
1752         case TCC_OPTION_U:
1753             tcc_undefine_symbol(s, optarg);
1754             break;
1755         case TCC_OPTION_L:
1756             tcc_add_library_path(s, optarg);
1757             break;
1758         case TCC_OPTION_B:
1759             /* set tcc utilities path (mainly for tcc development) */
1760             tcc_set_lib_path(s, optarg);
1761             break;
1762         case TCC_OPTION_l:
1763             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1764             s->nb_libraries++;
1765             break;
1766         case TCC_OPTION_pthread:
1767             s->option_pthread = 1;
1768             break;
1769         case TCC_OPTION_bench:
1770             s->do_bench = 1;
1771             break;
1772 #ifdef CONFIG_TCC_BACKTRACE
1773         case TCC_OPTION_bt:
1774             s->rt_num_callers = atoi(optarg);
1775             s->do_backtrace = 1;
1776             s->do_debug = 1;
1777             break;
1778 #endif
1779 #ifdef CONFIG_TCC_BCHECK
1780         case TCC_OPTION_b:
1781             s->do_bounds_check = 1;
1782             s->do_backtrace = 1;
1783             s->do_debug = 1;
1784             break;
1785 #endif
1786         case TCC_OPTION_g:
1787             s->do_debug = 1;
1788             break;
1789         case TCC_OPTION_c:
1790             x = TCC_OUTPUT_OBJ;
1791         set_output_type:
1792             if (s->output_type)
1793                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1794             s->output_type = x;
1795             break;
1796         case TCC_OPTION_d:
1797             if (*optarg == 'D')
1798                 s->dflag = 3;
1799             else if (*optarg == 'M')
1800                 s->dflag = 7;
1801             else if (*optarg == 't')
1802                 s->dflag = 16;
1803             else if (isnum(*optarg))
1804                 s->g_debug |= atoi(optarg);
1805             else
1806                 goto unsupported_option;
1807             break;
1808         case TCC_OPTION_static:
1809             s->static_link = 1;
1810             break;
1811         case TCC_OPTION_std:
1812             if (strcmp(optarg, "=c11") == 0)
1813                 s->cversion = 201112;
1814             break;
1815         case TCC_OPTION_shared:
1816             x = TCC_OUTPUT_DLL;
1817             goto set_output_type;
1818         case TCC_OPTION_soname:
1819             s->soname = tcc_strdup(optarg);
1820             break;
1821         case TCC_OPTION_o:
1822             if (s->outfile) {
1823                 tcc_warning("multiple -o option");
1824                 tcc_free(s->outfile);
1825             }
1826             s->outfile = tcc_strdup(optarg);
1827             break;
1828         case TCC_OPTION_r:
1829             /* generate a .o merging several output files */
1830             s->option_r = 1;
1831             x = TCC_OUTPUT_OBJ;
1832             goto set_output_type;
1833         case TCC_OPTION_isystem:
1834             tcc_add_sysinclude_path(s, optarg);
1835             break;
1836         case TCC_OPTION_include:
1837             cstr_printf(&s->cmdline_incl, "#include \"%s\"\n", optarg);
1838             break;
1839         case TCC_OPTION_nostdinc:
1840             s->nostdinc = 1;
1841             break;
1842         case TCC_OPTION_nostdlib:
1843             s->nostdlib = 1;
1844             break;
1845         case TCC_OPTION_run:
1846 #ifndef TCC_IS_NATIVE
1847             tcc_error("-run is not available in a cross compiler");
1848 #endif
1849             run = optarg;
1850             x = TCC_OUTPUT_MEMORY;
1851             goto set_output_type;
1852         case TCC_OPTION_v:
1853             do ++s->verbose; while (*optarg++ == 'v');
1854             ++noaction;
1855             break;
1856         case TCC_OPTION_f:
1857             if (set_flag(s, options_f, optarg) < 0)
1858                 goto unsupported_option;
1859             break;
1860 #ifdef TCC_TARGET_ARM
1861         case TCC_OPTION_mfloat_abi:
1862             /* tcc doesn't support soft float yet */
1863             if (!strcmp(optarg, "softfp")) {
1864                 s->float_abi = ARM_SOFTFP_FLOAT;
1865             } else if (!strcmp(optarg, "hard"))
1866                 s->float_abi = ARM_HARD_FLOAT;
1867             else
1868                 tcc_error("unsupported float abi '%s'", optarg);
1869             break;
1870 #endif
1871         case TCC_OPTION_m:
1872             if (set_flag(s, options_m, optarg) < 0) {
1873                 if (x = atoi(optarg), x != 32 && x != 64)
1874                     goto unsupported_option;
1875                 if (PTR_SIZE != x/8)
1876                     return x;
1877                 ++noaction;
1878             }
1879             break;
1880         case TCC_OPTION_W:
1881             s->warn_none = 0;
1882             if (optarg[0] && set_flag(s, options_W, optarg) < 0)
1883                 goto unsupported_option;
1884             break;
1885         case TCC_OPTION_w:
1886             s->warn_none = 1;
1887             break;
1888         case TCC_OPTION_rdynamic:
1889             s->rdynamic = 1;
1890             break;
1891         case TCC_OPTION_Wl:
1892             if (linker_arg.size)
1893                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1894             cstr_cat(&linker_arg, optarg, 0);
1895             if (tcc_set_linker(s, linker_arg.data))
1896                 cstr_free(&linker_arg);
1897             break;
1898         case TCC_OPTION_Wp:
1899             r = optarg;
1900             goto reparse;
1901         case TCC_OPTION_E:
1902             x = TCC_OUTPUT_PREPROCESS;
1903             goto set_output_type;
1904         case TCC_OPTION_P:
1905             s->Pflag = atoi(optarg) + 1;
1906             break;
1907         case TCC_OPTION_MD:
1908             s->gen_deps = 1;
1909             break;
1910         case TCC_OPTION_MF:
1911             s->deps_outfile = tcc_strdup(optarg);
1912             break;
1913         case TCC_OPTION_dumpversion:
1914             printf ("%s\n", TCC_VERSION);
1915             exit(0);
1916             break;
1917         case TCC_OPTION_x:
1918             x = 0;
1919             if (*optarg == 'c')
1920                 x = AFF_TYPE_C;
1921             else if (*optarg == 'a')
1922                 x = AFF_TYPE_ASMPP;
1923             else if (*optarg == 'b')
1924                 x = AFF_TYPE_BIN;
1925             else if (*optarg == 'n')
1926                 x = AFF_TYPE_NONE;
1927             else
1928                 tcc_warning("unsupported language '%s'", optarg);
1929             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
1930             break;
1931         case TCC_OPTION_O:
1932             s->optimize = atoi(optarg);
1933             break;
1934         case TCC_OPTION_print_search_dirs:
1935             x = OPT_PRINT_DIRS;
1936             goto extra_action;
1937         case TCC_OPTION_impdef:
1938             x = OPT_IMPDEF;
1939             goto extra_action;
1940         case TCC_OPTION_ar:
1941             x = OPT_AR;
1942         extra_action:
1943             arg_start = optind - 1;
1944             if (arg_start != noaction)
1945                 tcc_error("cannot parse %s here", r);
1946             tool = x;
1947             break;
1948         case TCC_OPTION_traditional:
1949         case TCC_OPTION_pedantic:
1950         case TCC_OPTION_pipe:
1951         case TCC_OPTION_s:
1952         case TCC_OPTION_C:
1953             /* ignored */
1954             break;
1955         default:
1956 unsupported_option:
1957             if (s->warn_unsupported)
1958                 tcc_warning("unsupported option '%s'", r);
1959             break;
1960         }
1961     }
1962     if (linker_arg.size) {
1963         r = linker_arg.data;
1964         goto arg_err;
1965     }
1966     *pargc = argc - arg_start;
1967     *pargv = argv + arg_start;
1968     if (tool)
1969         return tool;
1970     if (optind != noaction)
1971         return 0;
1972     if (s->verbose == 2)
1973         return OPT_PRINT_DIRS;
1974     if (s->verbose)
1975         return OPT_V;
1976     return OPT_HELP;
1977 }
1978
1979 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
1980 {
1981     char **argv = NULL;
1982     int argc = 0;
1983     args_parser_make_argv(r, &argc, &argv);
1984     tcc_parse_args(s, &argc, &argv, 0);
1985     dynarray_reset(&argv, &argc);
1986 }
1987
1988 PUB_FUNC void tcc_print_stats(TCCState *s1, unsigned total_time)
1989 {
1990     if (total_time < 1)
1991         total_time = 1;
1992     if (total_bytes < 1)
1993         total_bytes = 1;
1994     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
1995                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
1996            total_idents, total_lines, total_bytes,
1997            (double)total_time/1000,
1998            (unsigned)total_lines*1000/total_time,
1999            (double)total_bytes/1000/total_time);
2000     fprintf(stderr, "* text %d, data %d, bss %d bytes\n",
2001            s1->total_output[0], s1->total_output[1], s1->total_output[2]);
2002 #ifdef MEM_DEBUG
2003     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
2004 #endif
2005 }