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 #endif /* ONE_SOURCE */
  60
  61 #include "tcc.h"
  62
  63 /********************************************************/
  64 /* global variables */
  65
  66 /* XXX: get rid of this ASAP (or maybe not) */
  67 ST_DATA struct TCCState *tcc_state;
  68
  69 #ifdef MEM_DEBUG
  70 static int nb_states;
  71 #endif
  72
  73 /********************************************************/
  74 #ifdef _WIN32
  75 ST_FUNC char *normalize_slashes(char *path)
  76 {
  77     char *p;
  78     for (p = path; *p; ++p)
  79         if (*p == '\\')
  80             *p = '/';
  81     return path;
  82 }
  83
  84 static HMODULE tcc_module;
  85
  86 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  87 static void tcc_set_lib_path_w32(TCCState *s)
  88 {
  89     char path[1024], *p;
  90     GetModuleFileNameA(tcc_module, path, sizeof path);
  91     p = tcc_basename(normalize_slashes(strlwr(path)));
  92     if (p > path)
  93         --p;
  94     *p = 0;
  95     tcc_set_lib_path(s, path);
  96 }
  97
  98 #ifdef TCC_TARGET_PE
  99 static void tcc_add_systemdir(TCCState *s)
 100 {
 101     char buf[1000];
 102     GetSystemDirectory(buf, sizeof buf);
 103     tcc_add_library_path(s, normalize_slashes(buf));
 104 }
 105 #endif
 106
 107 #ifdef LIBTCC_AS_DLL
 108 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 109 {
 110     if (DLL_PROCESS_ATTACH == dwReason)
 111         tcc_module = hDll;
 112     return TRUE;
 113 }
 114 #endif
 115 #endif
 116
 117 /********************************************************/
 118 #ifndef CONFIG_TCC_SEMLOCK
 119 #define WAIT_SEM()
 120 #define POST_SEM()
 121 #elif defined _WIN32
 122 static int tcc_sem_init;
 123 static CRITICAL_SECTION tcc_cr;
 124 static void wait_sem(void)
 125 {
 126     if (!tcc_sem_init)
 127         InitializeCriticalSection(&tcc_cr), tcc_sem_init = 1;
 128     EnterCriticalSection(&tcc_cr);
 129 }
 130 #define WAIT_SEM() wait_sem()
 131 #define POST_SEM() LeaveCriticalSection(&tcc_cr);
 132 #else
 133 #include <semaphore.h>
 134 static int tcc_sem_init;
 135 static sem_t tcc_sem;
 136 static void wait_sem(void)
 137 {
 138     if (!tcc_sem_init)
 139         sem_init(&tcc_sem, 0, 1), tcc_sem_init = 1;
 140     while (sem_wait (&tcc_sem) < 0 && errno == EINTR);
 141 }
 142 #define WAIT_SEM() wait_sem()
 143 #define POST_SEM() sem_post(&tcc_sem)
 144 #endif
 145
 146 /********************************************************/
 147 /* copy a string and truncate it. */
 148 ST_FUNC char *pstrcpy(char *buf, size_t buf_size, const char *s)
 149 {
 150     char *q, *q_end;
 151     int c;
 152
 153     if (buf_size > 0) {
 154         q = buf;
 155         q_end = buf + buf_size - 1;
 156         while (q < q_end) {
 157             c = *s++;
 158             if (c == '\0')
 159                 break;
 160             *q++ = c;
 161         }
 162         *q = '\0';
 163     }
 164     return buf;
 165 }
 166
 167 /* strcat and truncate. */
 168 ST_FUNC char *pstrcat(char *buf, size_t buf_size, const char *s)
 169 {
 170     size_t len;
 171     len = strlen(buf);
 172     if (len < buf_size)
 173         pstrcpy(buf + len, buf_size - len, s);
 174     return buf;
 175 }
 176
 177 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 178 {
 179     memcpy(out, in, num);
 180     out[num] = '\0';
 181     return out;
 182 }
 183
 184 /* extract the basename of a file */
 185 PUB_FUNC char *tcc_basename(const char *name)
 186 {
 187     char *p = strchr(name, 0);
 188     while (p > name && !IS_DIRSEP(p[-1]))
 189         --p;
 190     return p;
 191 }
 192
 193 /* extract extension part of a file
 194  *
 195  * (if no extension, return pointer to end-of-string)
 196  */
 197 PUB_FUNC char *tcc_fileextension (const char *name)
 198 {
 199     char *b = tcc_basename(name);
 200     char *e = strrchr(b, '.');
 201     return e ? e : strchr(b, 0);
 202 }
 203
 204 /********************************************************/
 205 /* memory management */
 206
 207 #undef free
 208 #undef malloc
 209 #undef realloc
 210
 211 #ifndef MEM_DEBUG
 212
 213 PUB_FUNC void tcc_free(void *ptr)
 214 {
 215     free(ptr);
 216 }
 217
 218 PUB_FUNC void *tcc_malloc(unsigned long size)
 219 {
 220     void *ptr;
 221     ptr = malloc(size);
 222     if (!ptr && size)
 223         _tcc_error("memory full (malloc)");
 224     return ptr;
 225 }
 226
 227 PUB_FUNC void *tcc_mallocz(unsigned long size)
 228 {
 229     void *ptr;
 230     ptr = tcc_malloc(size);
 231     memset(ptr, 0, size);
 232     return ptr;
 233 }
 234
 235 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 236 {
 237     void *ptr1;
 238     ptr1 = realloc(ptr, size);
 239     if (!ptr1 && size)
 240         _tcc_error("memory full (realloc)");
 241     return ptr1;
 242 }
 243
 244 PUB_FUNC char *tcc_strdup(const char *str)
 245 {
 246     char *ptr;
 247     ptr = tcc_malloc(strlen(str) + 1);
 248     strcpy(ptr, str);
 249     return ptr;
 250 }
 251
 252 #else
 253
 254 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 255 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 256 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 257 #define MEM_DEBUG_FILE_LEN 40
 258 #define MEM_DEBUG_CHECK3(header) \
 259     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 260 #define MEM_USER_PTR(header) \
 261     ((char *)header + offsetof(mem_debug_header_t, magic3))
 262 #define MEM_HEADER_PTR(ptr) \
 263     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 264
 265 struct mem_debug_header {
 266     unsigned magic1;
 267     unsigned size;
 268     struct mem_debug_header *prev;
 269     struct mem_debug_header *next;
 270     int line_num;
 271     char file_name[MEM_DEBUG_FILE_LEN + 1];
 272     unsigned magic2;
 273     ALIGNED(16) unsigned magic3;
 274 };
 275
 276 typedef struct mem_debug_header mem_debug_header_t;
 277
 278 static mem_debug_header_t *mem_debug_chain;
 279 static unsigned mem_cur_size;
 280 static unsigned mem_max_size;
 281
 282 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 283 {
 284     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 285     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 286         header->magic2 != MEM_DEBUG_MAGIC2 ||
 287         MEM_DEBUG_CHECK3(header) != MEM_DEBUG_MAGIC3 ||
 288         header->size == (unsigned)-1) {
 289         fprintf(stderr, "%s check failed\n", msg);
 290         if (header->magic1 == MEM_DEBUG_MAGIC1)
 291             fprintf(stderr, "%s:%u: block allocated here.\n",
 292                 header->file_name, header->line_num);
 293         exit(1);
 294     }
 295     return header;
 296 }
 297
 298 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 299 {
 300     int ofs;
 301     mem_debug_header_t *header;
 302
 303     header = malloc(sizeof(mem_debug_header_t) + size);
 304     if (!header)
 305         _tcc_error("memory full (malloc)");
 306
 307     header->magic1 = MEM_DEBUG_MAGIC1;
 308     header->magic2 = MEM_DEBUG_MAGIC2;
 309     header->size = size;
 310     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 311     header->line_num = line;
 312     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 313     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 314     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 315
 316     header->next = mem_debug_chain;
 317     header->prev = NULL;
 318     if (header->next)
 319         header->next->prev = header;
 320     mem_debug_chain = header;
 321
 322     mem_cur_size += size;
 323     if (mem_cur_size > mem_max_size)
 324         mem_max_size = mem_cur_size;
 325
 326     return MEM_USER_PTR(header);
 327 }
 328
 329 PUB_FUNC void tcc_free_debug(void *ptr)
 330 {
 331     mem_debug_header_t *header;
 332     if (!ptr)
 333         return;
 334     header = malloc_check(ptr, "tcc_free");
 335     mem_cur_size -= header->size;
 336     header->size = (unsigned)-1;
 337     if (header->next)
 338         header->next->prev = header->prev;
 339     if (header->prev)
 340         header->prev->next = header->next;
 341     if (header == mem_debug_chain)
 342         mem_debug_chain = header->next;
 343     free(header);
 344 }
 345
 346 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 347 {
 348     void *ptr;
 349     ptr = tcc_malloc_debug(size,file,line);
 350     memset(ptr, 0, size);
 351     return ptr;
 352 }
 353
 354 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 355 {
 356     mem_debug_header_t *header;
 357     int mem_debug_chain_update = 0;
 358     if (!ptr)
 359         return tcc_malloc_debug(size, file, line);
 360     header = malloc_check(ptr, "tcc_realloc");
 361     mem_cur_size -= header->size;
 362     mem_debug_chain_update = (header == mem_debug_chain);
 363     header = realloc(header, sizeof(mem_debug_header_t) + size);
 364     if (!header)
 365         _tcc_error("memory full (realloc)");
 366     header->size = size;
 367     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 368     if (header->next)
 369         header->next->prev = header;
 370     if (header->prev)
 371         header->prev->next = header;
 372     if (mem_debug_chain_update)
 373         mem_debug_chain = header;
 374     mem_cur_size += size;
 375     if (mem_cur_size > mem_max_size)
 376         mem_max_size = mem_cur_size;
 377     return MEM_USER_PTR(header);
 378 }
 379
 380 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 381 {
 382     char *ptr;
 383     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 384     strcpy(ptr, str);
 385     return ptr;
 386 }
 387
 388 PUB_FUNC void tcc_memcheck(void)
 389 {
 390     if (mem_cur_size) {
 391         mem_debug_header_t *header = mem_debug_chain;
 392         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 393             mem_cur_size, mem_max_size);
 394         while (header) {
 395             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 396                 header->file_name, header->line_num, header->size);
 397             header = header->next;
 398         }
 399 #if MEM_DEBUG-0 == 2
 400         exit(2);
 401 #endif
 402     }
 403 }
 404 #endif /* MEM_DEBUG */
 405
 406 #define free(p) use_tcc_free(p)
 407 #define malloc(s) use_tcc_malloc(s)
 408 #define realloc(p, s) use_tcc_realloc(p, s)
 409
 410 /********************************************************/
 411 /* dynarrays */
 412
 413 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 414 {
 415     int nb, nb_alloc;
 416     void **pp;
 417
 418     nb = *nb_ptr;
 419     pp = *(void ***)ptab;
 420     /* every power of two we double array size */
 421     if ((nb & (nb - 1)) == 0) {
 422         if (!nb)
 423             nb_alloc = 1;
 424         else
 425             nb_alloc = nb * 2;
 426         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 427         *(void***)ptab = pp;
 428     }
 429     pp[nb++] = data;
 430     *nb_ptr = nb;
 431 }
 432
 433 ST_FUNC void dynarray_reset(void *pp, int *n)
 434 {
 435     void **p;
 436     for (p = *(void***)pp; *n; ++p, --*n)
 437         if (*p)
 438             tcc_free(*p);
 439     tcc_free(*(void**)pp);
 440     *(void**)pp = NULL;
 441 }
 442
 443 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 444 {
 445     const char *p;
 446     do {
 447         int c;
 448         CString str;
 449
 450         cstr_new(&str);
 451         for (p = in; c = *p, c != '\0' && c != PATHSEP[0]; ++p) {
 452             if (c == '{' && p[1] && p[2] == '}') {
 453                 c = p[1], p += 2;
 454                 if (c == 'B')
 455                     cstr_cat(&str, s->tcc_lib_path, -1);
 456                 if (c == 'f' && file) {
 457                     /* substitute current file's dir */
 458                     const char *f = file->true_filename;
 459                     const char *b = tcc_basename(f);
 460                     if (b > f)
 461                         cstr_cat(&str, f, b - f - 1);
 462                     else
 463                         cstr_cat(&str, ".", 1);
 464                 }
 465             } else {
 466                 cstr_ccat(&str, c);
 467             }
 468         }
 469         if (str.size) {
 470             cstr_ccat(&str, '\0');
 471             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 472         }
 473         cstr_free(&str);
 474         in = p+1;
 475     } while (*p);
 476 }
 477
 478 /********************************************************/
 479
 480 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 481 {
 482     int len;
 483     len = strlen(buf);
 484     vsnprintf(buf + len, buf_size - len, fmt, ap);
 485 }
 486
 487 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 488 {
 489     va_list ap;
 490     va_start(ap, fmt);
 491     strcat_vprintf(buf, buf_size, fmt, ap);
 492     va_end(ap);
 493 }
 494
 495 #define ERROR_WARN 0
 496 #define ERROR_NOABORT 1
 497 #define ERROR_ERROR 2
 498
 499 PUB_FUNC void tcc_enter_state(TCCState *s1)
 500 {
 501     WAIT_SEM();
 502     tcc_state = s1;
 503 }
 504
 505 static void error1(int mode, const char *fmt, va_list ap)
 506 {
 507     char buf[2048];
 508     BufferedFile **pf, *f;
 509     TCCState *s1 = tcc_state;
 510
 511     buf[0] = '\0';
 512     if (s1 == NULL)
 513         /* can happen only if called from tcc_malloc(): 'out of memory' */
 514         goto no_file;
 515
 516     if (!s1->error_set_jmp_enabled) {
 517         /* tcc_state just was set by tcc_enter_state() */
 518         tcc_state = NULL;
 519         POST_SEM();
 520     }
 521
 522     if (mode == ERROR_WARN) {
 523         if (s1->warn_none)
 524             return;
 525         if (s1->warn_error)
 526             mode = ERROR_ERROR;
 527     }
 528
 529     f = NULL;
 530     if (s1->error_set_jmp_enabled) { /* we're called while parsing a file */
 531         /* use upper file if inline ":asm:" or token ":paste:" */
 532         for (f = file; f && f->filename[0] == ':'; f = f->prev)
 533             ;
 534     }
 535     if (f) {
 536         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 537             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 538                 (*pf)->filename, (*pf)->line_num);
 539         strcat_printf(buf, sizeof(buf), "%s:%d: ",
 540             f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 541     } else if (s1->current_filename) {
 542         strcat_printf(buf, sizeof(buf), "%s: ", s1->current_filename);
 543     }
 544
 545 no_file:
 546     if (0 == buf[0])
 547         strcat_printf(buf, sizeof(buf), "tcc: ");
 548     if (mode == ERROR_WARN)
 549         strcat_printf(buf, sizeof(buf), "warning: ");
 550     else
 551         strcat_printf(buf, sizeof(buf), "error: ");
 552     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 553     if (!s1 || !s1->error_func) {
 554         /* default case: stderr */
 555         if (s1 && s1->output_type == TCC_OUTPUT_PREPROCESS && s1->ppfp == stdout)
 556             /* print a newline during tcc -E */
 557             printf("\n"), fflush(stdout);
 558         fflush(stdout); /* flush -v output */
 559         fprintf(stderr, "%s\n", buf);
 560         fflush(stderr); /* print error/warning now (win32) */
 561     } else {
 562         s1->error_func(s1->error_opaque, buf);
 563     }
 564     if (s1) {
 565         if (mode != ERROR_WARN)
 566             s1->nb_errors++;
 567         if (mode != ERROR_ERROR)
 568             return;
 569         if (s1->error_set_jmp_enabled)
 570             longjmp(s1->error_jmp_buf, 1);
 571     }
 572     exit(1);
 573 }
 574
 575 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque, TCCErrorFunc error_func)
 576 {
 577     s->error_opaque = error_opaque;
 578     s->error_func = error_func;
 579 }
 580
 581 LIBTCCAPI TCCErrorFunc tcc_get_error_func(TCCState *s)
 582 {
 583     return s->error_func;
 584 }
 585
 586 LIBTCCAPI void *tcc_get_error_opaque(TCCState *s)
 587 {
 588     return s->error_opaque;
 589 }
 590
 591 /* error without aborting current compilation */
 592 PUB_FUNC void _tcc_error_noabort(const char *fmt, ...)
 593 {
 594     va_list ap;
 595     va_start(ap, fmt);
 596     error1(ERROR_NOABORT, fmt, ap);
 597     va_end(ap);
 598 }
 599
 600 PUB_FUNC void _tcc_error(const char *fmt, ...)
 601 {
 602     va_list ap;
 603     va_start(ap, fmt);
 604     for (;;) error1(ERROR_ERROR, fmt, ap);
 605 }
 606
 607 PUB_FUNC void _tcc_warning(const char *fmt, ...)
 608 {
 609     va_list ap;
 610     va_start(ap, fmt);
 611     error1(ERROR_WARN, fmt, ap);
 612     va_end(ap);
 613 }
 614
 615 /********************************************************/
 616 /* I/O layer */
 617
 618 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 619 {
 620     BufferedFile *bf;
 621     int buflen = initlen ? initlen : IO_BUF_SIZE;
 622
 623     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 624     bf->buf_ptr = bf->buffer;
 625     bf->buf_end = bf->buffer + initlen;
 626     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 627     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 628 #ifdef _WIN32
 629     normalize_slashes(bf->filename);
 630 #endif
 631     bf->true_filename = bf->filename;
 632     bf->line_num = 1;
 633     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 634     bf->fd = -1;
 635     bf->prev = file;
 636     file = bf;
 637     tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 638 }
 639
 640 ST_FUNC void tcc_close(void)
 641 {
 642     TCCState *s1 = tcc_state;
 643     BufferedFile *bf = file;
 644     if (bf->fd > 0) {
 645         close(bf->fd);
 646         total_lines += bf->line_num;
 647     }
 648     if (bf->true_filename != bf->filename)
 649         tcc_free(bf->true_filename);
 650     file = bf->prev;
 651     tcc_free(bf);
 652 }
 653
 654 static int _tcc_open(TCCState *s1, const char *filename)
 655 {
 656     int fd;
 657     if (strcmp(filename, "-") == 0)
 658         fd = 0, filename = "<stdin>";
 659     else
 660         fd = open(filename, O_RDONLY | O_BINARY);
 661     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 662         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 663                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 664     return fd;
 665 }
 666
 667 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 668 {
 669     int fd = _tcc_open(s1, filename);
 670     if (fd < 0)
 671         return -1;
 672     tcc_open_bf(s1, filename, 0);
 673     file->fd = fd;
 674     return 0;
 675 }
 676
 677 /* compile the file opened in 'file'. Return non zero if errors. */
 678 static int tcc_compile(TCCState *s1, int filetype, const char *str, int fd)
 679 {
 680     /* Here we enter the code section where we use the global variables for
 681        parsing and code generation (tccpp.c, tccgen.c, <target>-gen.c).
 682        Other threads need to wait until we're done.
 683
 684        Alternatively we could use thread local storage for those global
 685        variables, which may or may not have advantages */
 686
 687     WAIT_SEM();
 688     tcc_state = s1;
 689
 690     if (setjmp(s1->error_jmp_buf) == 0) {
 691         int is_asm;
 692         s1->error_set_jmp_enabled = 1;
 693         s1->nb_errors = 0;
 694
 695         if (fd == -1) {
 696             int len = strlen(str);
 697             tcc_open_bf(s1, "<string>", len);
 698             memcpy(file->buffer, str, len);
 699         } else {
 700             tcc_open_bf(s1, str, 0);
 701             file->fd = fd;
 702         }
 703
 704         is_asm = !!(filetype & (AFF_TYPE_ASM|AFF_TYPE_ASMPP));
 705         tccelf_begin_file(s1);
 706         preprocess_start(s1, is_asm);
 707         tccgen_init(s1);
 708         if (s1->output_type == TCC_OUTPUT_PREPROCESS) {
 709             tcc_preprocess(s1);
 710         } else if (is_asm) {
 711 #ifdef CONFIG_TCC_ASM
 712             tcc_assemble(s1, !!(filetype & AFF_TYPE_ASMPP));
 713 #else
 714             tcc_error_noabort("asm not supported");
 715 #endif
 716         } else {
 717             tccgen_compile(s1);
 718         }
 719     }
 720     s1->error_set_jmp_enabled = 0;
 721     tccgen_finish(s1);
 722     preprocess_end(s1);
 723     tccelf_end_file(s1);
 724
 725     tcc_state = NULL;
 726     POST_SEM();
 727     return s1->nb_errors != 0 ? -1 : 0;
 728 }
 729
 730 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 731 {
 732     return tcc_compile(s, s->filetype, str, -1);
 733 }
 734
 735 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 736 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 737 {
 738     if (!value)
 739         value = "1";
 740     cstr_printf(&s1->cmdline_defs, "#define %s %s\n", sym, value);
 741 }
 742
 743 /* undefine a preprocessor symbol */
 744 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 745 {
 746     cstr_printf(&s1->cmdline_defs, "#undef %s\n", sym);
 747 }
 748
 749
 750 LIBTCCAPI TCCState *tcc_new(void)
 751 {
 752     TCCState *s;
 753
 754     s = tcc_mallocz(sizeof(TCCState));
 755     if (!s)
 756         return NULL;
 757 #ifdef MEM_DEBUG
 758     ++nb_states;
 759 #endif
 760
 761 #undef gnu_ext
 762
 763     s->gnu_ext = 1;
 764     s->tcc_ext = 1;
 765     s->nocommon = 1;
 766     s->dollars_in_identifiers = 1; /*on by default like in gcc/clang*/
 767     s->cversion = 199901; /* default unless -std=c11 is supplied */
 768     s->warn_implicit_function_declaration = 1;
 769     s->ms_extensions = 1;
 770
 771 #ifdef CHAR_IS_UNSIGNED
 772     s->char_is_unsigned = 1;
 773 #endif
 774 #ifdef TCC_TARGET_I386
 775     s->seg_size = 32;
 776 #endif
 777     /* enable this if you want symbols with leading underscore on windows: */
 778 #if 0 /* def TCC_TARGET_PE */
 779     s->leading_underscore = 1;
 780 #endif
 781     s->ppfp = stdout;
 782     /* might be used in error() before preprocess_start() */
 783     s->include_stack_ptr = s->include_stack;
 784
 785     tccelf_new(s);
 786
 787 #ifdef _WIN32
 788     tcc_set_lib_path_w32(s);
 789 #else
 790     tcc_set_lib_path(s, CONFIG_TCCDIR);
 791 #endif
 792
 793     {
 794         /* define __TINYC__ 92X  */
 795         char buffer[32]; int a,b,c;
 796         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 797         sprintf(buffer, "%d", a*10000 + b*100 + c);
 798         tcc_define_symbol(s, "__TINYC__", buffer);
 799     }
 800
 801     /* standard defines */
 802     tcc_define_symbol(s, "__STDC__", NULL);
 803     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 804     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 805
 806     /* target defines */
 807 #if defined(TCC_TARGET_I386)
 808     tcc_define_symbol(s, "__i386__", NULL);
 809     tcc_define_symbol(s, "__i386", NULL);
 810     tcc_define_symbol(s, "i386", NULL);
 811 #elif defined(TCC_TARGET_X86_64)
 812     tcc_define_symbol(s, "__x86_64__", NULL);
 813 #elif defined(TCC_TARGET_ARM)
 814     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 815     tcc_define_symbol(s, "__arm_elf__", NULL);
 816     tcc_define_symbol(s, "__arm_elf", NULL);
 817     tcc_define_symbol(s, "arm_elf", NULL);
 818     tcc_define_symbol(s, "__arm__", NULL);
 819     tcc_define_symbol(s, "__arm", NULL);
 820     tcc_define_symbol(s, "arm", NULL);
 821     tcc_define_symbol(s, "__APCS_32__", NULL);
 822     tcc_define_symbol(s, "__ARMEL__", NULL);
 823 #if defined(TCC_ARM_EABI)
 824     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 825 #endif
 826 #if defined(TCC_ARM_HARDFLOAT)
 827     s->float_abi = ARM_HARD_FLOAT;
 828     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 829 #else
 830     s->float_abi = ARM_SOFTFP_FLOAT;
 831 #endif
 832 #elif defined(TCC_TARGET_ARM64)
 833     tcc_define_symbol(s, "__aarch64__", NULL);
 834 #elif defined TCC_TARGET_C67
 835     tcc_define_symbol(s, "__C67__", NULL);
 836 #elif defined TCC_TARGET_RISCV64
 837     tcc_define_symbol(s, "__riscv", NULL);
 838     tcc_define_symbol(s, "__riscv_xlen", "64");
 839     tcc_define_symbol(s, "__riscv_flen", "64");
 840     tcc_define_symbol(s, "__riscv_div", NULL);
 841     tcc_define_symbol(s, "__riscv_mul", NULL);
 842     tcc_define_symbol(s, "__riscv_fdiv", NULL);
 843     tcc_define_symbol(s, "__riscv_fsqrt", NULL);
 844     tcc_define_symbol(s, "__riscv_float_abi_double", NULL);
 845 #endif
 846
 847 #ifdef TCC_TARGET_PE
 848     tcc_define_symbol(s, "_WIN32", NULL);
 849     tcc_define_symbol(s, "__declspec(x)", "__attribute__((x))");
 850     tcc_define_symbol(s, "__cdecl", "");
 851 # ifdef TCC_TARGET_X86_64
 852     tcc_define_symbol(s, "_WIN64", NULL);
 853 # endif
 854 #else
 855     tcc_define_symbol(s, "__unix__", NULL);
 856     tcc_define_symbol(s, "__unix", NULL);
 857     tcc_define_symbol(s, "unix", NULL);
 858 # if defined(__linux__)
 859     tcc_define_symbol(s, "__linux__", NULL);
 860     tcc_define_symbol(s, "__linux", NULL);
 861 # endif
 862 # if defined(__FreeBSD__)
 863     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 864     /* No 'Thread Storage Local' on FreeBSD with tcc */
 865     tcc_define_symbol(s, "__NO_TLS", NULL);
 866 # endif
 867 # if defined(__FreeBSD_kernel__)
 868     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 869 # endif
 870 # if defined(__NetBSD__)
 871     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 872 # endif
 873 # if defined(__OpenBSD__)
 874     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 875 # endif
 876 #endif
 877
 878     /* TinyCC & gcc defines */
 879 #if PTR_SIZE == 4
 880     /* 32bit systems. */
 881     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
 882     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
 883     tcc_define_symbol(s, "__ILP32__", NULL);
 884 #elif LONG_SIZE == 4
 885     /* 64bit Windows. */
 886     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 887     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 888     tcc_define_symbol(s, "__LLP64__", NULL);
 889 #else
 890     /* Other 64bit systems. */
 891     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 892     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 893     tcc_define_symbol(s, "__LP64__", NULL);
 894 #endif
 895     tcc_define_symbol(s, "__SIZEOF_POINTER__", PTR_SIZE == 4 ? "4" : "8");
 896
 897 #ifdef TCC_TARGET_PE
 898     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 899     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 900 #else
 901     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 902     /* wint_t is unsigned int by default, but (signed) int on BSDs
 903        and unsigned short on windows.  Other OSes might have still
 904        other conventions, sigh.  */
 905 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 906   || defined(__NetBSD__) || defined(__OpenBSD__)
 907     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 908 #  ifdef __FreeBSD__
 909     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 910        that are unconditionally used in FreeBSDs other system headers :/ */
 911     tcc_define_symbol(s, "__GNUC__", "2");
 912     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 913     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 914 #  endif
 915 # else
 916     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 917     /* glibc defines */
 918     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 919         "name proto __asm__ (#alias)");
 920     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 921         "name proto __asm__ (#alias) __THROW");
 922 # endif
 923     /* Some GCC builtins that are simple to express as macros.  */
 924     tcc_define_symbol(s, "__builtin_extract_return_addr(x)", "x");
 925 #endif /* ndef TCC_TARGET_PE */
 926 #ifdef TCC_TARGET_MACHO
 927     /* emulate APPLE-GCC to make libc's headerfiles compile: */
 928     tcc_define_symbol(s, "__APPLE__", "1");
 929     tcc_define_symbol(s, "__GNUC__", "4");   /* darwin emits warning on GCC<4 */
 930
 931     /* avoids usage of GCC/clang specific builtins in libc-headerfiles: */
 932     tcc_define_symbol(s, "__FINITE_MATH_ONLY__", "1");
 933     tcc_define_symbol(s, "_FORTIFY_SOURCE", "0");
 934 #endif /* ndef TCC_TARGET_MACHO */
 935     return s;
 936 }
 937
 938 LIBTCCAPI void tcc_delete(TCCState *s1)
 939 {
 940     /* free sections */
 941     tccelf_delete(s1);
 942
 943     /* free library paths */
 944     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 945     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 946
 947     /* free include paths */
 948     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 949     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 950
 951     tcc_free(s1->tcc_lib_path);
 952     tcc_free(s1->soname);
 953     tcc_free(s1->rpath);
 954     tcc_free(s1->init_symbol);
 955     tcc_free(s1->fini_symbol);
 956     tcc_free(s1->outfile);
 957     tcc_free(s1->deps_outfile);
 958     dynarray_reset(&s1->files, &s1->nb_files);
 959     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 960     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 961     dynarray_reset(&s1->argv, &s1->argc);
 962
 963     cstr_free(&s1->cmdline_defs);
 964     cstr_free(&s1->cmdline_incl);
 965 #ifdef TCC_IS_NATIVE
 966     /* free runtime memory */
 967     tcc_run_free(s1);
 968 #endif
 969
 970     tcc_free(s1);
 971 #ifdef MEM_DEBUG
 972     if (0 == --nb_states)
 973         tcc_memcheck();
 974 #endif
 975 }
 976
 977 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 978 {
 979     s->output_type = output_type;
 980
 981     /* always elf for objects */
 982     if (output_type == TCC_OUTPUT_OBJ)
 983         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 984
 985     if (s->char_is_unsigned)
 986         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 987
 988     if (s->cversion == 201112) {
 989         tcc_undefine_symbol(s, "__STDC_VERSION__");
 990         tcc_define_symbol(s, "__STDC_VERSION__", "201112L");
 991         tcc_define_symbol(s, "__STDC_NO_ATOMICS__", NULL);
 992         tcc_define_symbol(s, "__STDC_NO_COMPLEX__", NULL);
 993         tcc_define_symbol(s, "__STDC_NO_THREADS__", NULL);
 994 #ifndef TCC_TARGET_PE
 995         /* on Linux, this conflicts with a define introduced by
 996            /usr/include/stdc-predef.h included by glibc libs
 997         tcc_define_symbol(s, "__STDC_ISO_10646__", "201605L"); */
 998         tcc_define_symbol(s, "__STDC_UTF_16__", NULL);
 999         tcc_define_symbol(s, "__STDC_UTF_32__", NULL);
1000 #endif
1001     }
1002
1003     if (s->optimize > 0)
1004         tcc_define_symbol(s, "__OPTIMIZE__", NULL);
1005
1006     if (s->option_pthread)
1007         tcc_define_symbol(s, "_REENTRANT", NULL);
1008
1009     if (!s->nostdinc) {
1010         /* default include paths */
1011         /* -isystem paths have already been handled */
1012         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1013     }
1014
1015 #ifdef CONFIG_TCC_BCHECK
1016     if (s->do_bounds_check) {
1017         /* if bound checking, then add corresponding sections */
1018         tccelf_bounds_new(s);
1019         /* define symbol */
1020         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1021     }
1022 #endif
1023     if (s->do_debug) {
1024         /* add debug sections */
1025         tccelf_stab_new(s);
1026     }
1027
1028     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1029
1030 #ifdef TCC_TARGET_PE
1031 # ifdef _WIN32
1032     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
1033         tcc_add_systemdir(s);
1034 # endif
1035 #else
1036     /* paths for crt objects */
1037     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1038     /* add libc crt1/crti objects */
1039     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1040         !s->nostdlib) {
1041         if (output_type != TCC_OUTPUT_DLL)
1042             tcc_add_crt(s, "crt1.o");
1043         tcc_add_crt(s, "crti.o");
1044     }
1045 #endif
1046     return 0;
1047 }
1048
1049 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1050 {
1051     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
1052     return 0;
1053 }
1054
1055 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1056 {
1057     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1058     return 0;
1059 }
1060
1061 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1062 {
1063     int fd, ret;
1064
1065     /* open the file */
1066     fd = _tcc_open(s1, filename);
1067     if (fd < 0) {
1068         if (flags & AFF_PRINT_ERROR)
1069             tcc_error_noabort("file '%s' not found", filename);
1070         return -1;
1071     }
1072
1073     s1->current_filename = filename;
1074     if (flags & AFF_TYPE_BIN) {
1075         ElfW(Ehdr) ehdr;
1076         int obj_type;
1077
1078         obj_type = tcc_object_type(fd, &ehdr);
1079         lseek(fd, 0, SEEK_SET);
1080
1081 #ifdef TCC_TARGET_MACHO
1082         if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), ".dylib"))
1083             obj_type = AFF_BINTYPE_DYN;
1084 #endif
1085
1086         switch (obj_type) {
1087         case AFF_BINTYPE_REL:
1088             ret = tcc_load_object_file(s1, fd, 0);
1089             break;
1090 #ifndef TCC_TARGET_PE
1091         case AFF_BINTYPE_DYN:
1092             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1093                 ret = 0;
1094 #ifdef TCC_IS_NATIVE
1095                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1096                     ret = -1;
1097 #endif
1098             } else {
1099                 ret = tcc_load_dll(s1, fd, filename,
1100                                    (flags & AFF_REFERENCED_DLL) != 0);
1101             }
1102             break;
1103 #endif
1104         case AFF_BINTYPE_AR:
1105             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1106             break;
1107 #ifdef TCC_TARGET_COFF
1108         case AFF_BINTYPE_C67:
1109             ret = tcc_load_coff(s1, fd);
1110             break;
1111 #endif
1112         default:
1113 #ifdef TCC_TARGET_PE
1114             ret = pe_load_file(s1, filename, fd);
1115 #else
1116             /* as GNU ld, consider it is an ld script if not recognized */
1117             ret = tcc_load_ldscript(s1, fd);
1118 #endif
1119             if (ret < 0)
1120                 tcc_error_noabort("unrecognized file type");
1121             break;
1122         }
1123         close(fd);
1124     } else {
1125         /* update target deps */
1126         dynarray_add(&s1->target_deps, &s1->nb_target_deps, tcc_strdup(filename));
1127         ret = tcc_compile(s1, flags, filename, fd);
1128     }
1129     s1->current_filename = NULL;
1130     return ret;
1131 }
1132
1133 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1134 {
1135     int filetype = s->filetype;
1136     if (0 == (filetype & AFF_TYPE_MASK)) {
1137         /* use a file extension to detect a filetype */
1138         const char *ext = tcc_fileextension(filename);
1139         if (ext[0]) {
1140             ext++;
1141             if (!strcmp(ext, "S"))
1142                 filetype = AFF_TYPE_ASMPP;
1143             else if (!strcmp(ext, "s"))
1144                 filetype = AFF_TYPE_ASM;
1145             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1146                 filetype = AFF_TYPE_C;
1147             else
1148                 filetype |= AFF_TYPE_BIN;
1149         } else {
1150             filetype = AFF_TYPE_C;
1151         }
1152     }
1153     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1154 }
1155
1156 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1157 {
1158     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1159     return 0;
1160 }
1161
1162 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1163     const char *filename, int flags, char **paths, int nb_paths)
1164 {
1165     char buf[1024];
1166     int i;
1167
1168     for(i = 0; i < nb_paths; i++) {
1169         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1170         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1171             return 0;
1172     }
1173     return -1;
1174 }
1175
1176 /* find and load a dll. Return non zero if not found */
1177 /* XXX: add '-rpath' option support ? */
1178 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1179 {
1180     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1181         s->library_paths, s->nb_library_paths);
1182 }
1183
1184 #ifndef TCC_TARGET_PE
1185 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)
1186 {
1187     if (-1 == tcc_add_library_internal(s1, "%s/%s",
1188         filename, 0, s1->crt_paths, s1->nb_crt_paths))
1189         tcc_error_noabort("file '%s' not found", filename);
1190     return 0;
1191 }
1192 #endif
1193
1194 /* the library name is the same as the argument of the '-l' option */
1195 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1196 {
1197 #if defined TCC_TARGET_PE
1198     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1199     const char **pp = s->static_link ? libs + 4 : libs;
1200 #elif defined TCC_TARGET_MACHO
1201     const char *libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
1202     const char **pp = s->static_link ? libs + 1 : libs;
1203 #else
1204     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1205     const char **pp = s->static_link ? libs + 1 : libs;
1206 #endif
1207     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1208     while (*pp) {
1209         if (0 == tcc_add_library_internal(s, *pp,
1210             libraryname, flags, s->library_paths, s->nb_library_paths))
1211             return 0;
1212         ++pp;
1213     }
1214     return -1;
1215 }
1216
1217 PUB_FUNC int tcc_add_library_err(TCCState *s1, const char *libname)
1218 {
1219     int ret = tcc_add_library(s1, libname);
1220     if (ret < 0)
1221         tcc_error_noabort("library '%s' not found", libname);
1222     return ret;
1223 }
1224
1225 /* handle #pragma comment(lib,) */
1226 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1227 {
1228     int i;
1229     for (i = 0; i < s1->nb_pragma_libs; i++)
1230         tcc_add_library_err(s1, s1->pragma_libs[i]);
1231 }
1232
1233 LIBTCCAPI int tcc_add_symbol(TCCState *s1, const char *name, const void *val)
1234 {
1235 #ifdef TCC_TARGET_PE
1236     /* On x86_64 'val' might not be reachable with a 32bit offset.
1237        So it is handled here as if it were in a DLL. */
1238     pe_putimport(s1, 0, name, (uintptr_t)val);
1239 #else
1240     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1241         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1242         SHN_ABS, name);
1243 #endif
1244     return 0;
1245 }
1246
1247 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1248 {
1249     tcc_free(s->tcc_lib_path);
1250     s->tcc_lib_path = tcc_strdup(path);
1251 }
1252
1253 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1254 #define FD_INVERT 0x0002 /* invert value before storing */
1255
1256 typedef struct FlagDef {
1257     uint16_t offset;
1258     uint16_t flags;
1259     const char *name;
1260 } FlagDef;
1261
1262 static int no_flag(const char **pp)
1263 {
1264     const char *p = *pp;
1265     if (*p != 'n' || *++p != 'o' || *++p != '-')
1266         return 0;
1267     *pp = p + 1;
1268     return 1;
1269 }
1270
1271 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1272 {
1273     int value, ret;
1274     const FlagDef *p;
1275     const char *r;
1276
1277     value = 1;
1278     r = name;
1279     if (no_flag(&r))
1280         value = 0;
1281
1282     for (ret = -1, p = flags; p->name; ++p) {
1283         if (ret) {
1284             if (strcmp(r, p->name))
1285                 continue;
1286         } else {
1287             if (0 == (p->flags & WD_ALL))
1288                 continue;
1289         }
1290         if (p->offset) {
1291             *((unsigned char *)s + p->offset) =
1292                 p->flags & FD_INVERT ? !value : value;
1293             if (ret)
1294                 return 0;
1295         } else {
1296             ret = 0;
1297         }
1298     }
1299     return ret;
1300 }
1301
1302 static int strstart(const char *val, const char **str)
1303 {
1304     const char *p, *q;
1305     p = *str;
1306     q = val;
1307     while (*q) {
1308         if (*p != *q)
1309             return 0;
1310         p++;
1311         q++;
1312     }
1313     *str = p;
1314     return 1;
1315 }
1316
1317 /* Like strstart, but automatically takes into account that ld options can
1318  *
1319  * - start with double or single dash (e.g. '--soname' or '-soname')
1320  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1321  *   or '-Wl,-soname=x.so')
1322  *
1323  * you provide `val` always in 'option[=]' form (no leading -)
1324  */
1325 static int link_option(const char *str, const char *val, const char **ptr)
1326 {
1327     const char *p, *q;
1328     int ret;
1329
1330     /* there should be 1 or 2 dashes */
1331     if (*str++ != '-')
1332         return 0;
1333     if (*str == '-')
1334         str++;
1335
1336     /* then str & val should match (potentially up to '=') */
1337     p = str;
1338     q = val;
1339
1340     ret = 1;
1341     if (q[0] == '?') {
1342         ++q;
1343         if (no_flag(&p))
1344             ret = -1;
1345     }
1346
1347     while (*q != '\0' && *q != '=') {
1348         if (*p != *q)
1349             return 0;
1350         p++;
1351         q++;
1352     }
1353
1354     /* '=' near eos means ',' or '=' is ok */
1355     if (*q == '=') {
1356         if (*p == 0)
1357             *ptr = p;
1358         if (*p != ',' && *p != '=')
1359             return 0;
1360         p++;
1361     } else if (*p) {
1362         return 0;
1363     }
1364     *ptr = p;
1365     return ret;
1366 }
1367
1368 static const char *skip_linker_arg(const char **str)
1369 {
1370     const char *s1 = *str;
1371     const char *s2 = strchr(s1, ',');
1372     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1373     return s2;
1374 }
1375
1376 static void copy_linker_arg(char **pp, const char *s, int sep)
1377 {
1378     const char *q = s;
1379     char *p = *pp;
1380     int l = 0;
1381     if (p && sep)
1382         p[l = strlen(p)] = sep, ++l;
1383     skip_linker_arg(&q);
1384     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1385 }
1386
1387 /* set linker options */
1388 static int tcc_set_linker(TCCState *s, const char *option)
1389 {
1390     TCCState *s1 = s;
1391     while (*option) {
1392
1393         const char *p = NULL;
1394         char *end = NULL;
1395         int ignoring = 0;
1396         int ret;
1397
1398         if (link_option(option, "Bsymbolic", &p)) {
1399             s->symbolic = 1;
1400         } else if (link_option(option, "nostdlib", &p)) {
1401             s->nostdlib = 1;
1402         } else if (link_option(option, "fini=", &p)) {
1403             copy_linker_arg(&s->fini_symbol, p, 0);
1404             ignoring = 1;
1405         } else if (link_option(option, "image-base=", &p)
1406                 || link_option(option, "Ttext=", &p)) {
1407             s->text_addr = strtoull(p, &end, 16);
1408             s->has_text_addr = 1;
1409         } else if (link_option(option, "init=", &p)) {
1410             copy_linker_arg(&s->init_symbol, p, 0);
1411             ignoring = 1;
1412         } else if (link_option(option, "oformat=", &p)) {
1413 #if defined(TCC_TARGET_PE)
1414             if (strstart("pe-", &p)) {
1415 #elif PTR_SIZE == 8
1416             if (strstart("elf64-", &p)) {
1417 #else
1418             if (strstart("elf32-", &p)) {
1419 #endif
1420                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1421             } else if (!strcmp(p, "binary")) {
1422                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1423 #ifdef TCC_TARGET_COFF
1424             } else if (!strcmp(p, "coff")) {
1425                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1426 #endif
1427             } else
1428                 goto err;
1429
1430         } else if (link_option(option, "as-needed", &p)) {
1431             ignoring = 1;
1432         } else if (link_option(option, "O", &p)) {
1433             ignoring = 1;
1434         } else if (link_option(option, "export-all-symbols", &p)) {
1435             s->rdynamic = 1;
1436         } else if (link_option(option, "export-dynamic", &p)) {
1437             s->rdynamic = 1;
1438         } else if (link_option(option, "rpath=", &p)) {
1439             copy_linker_arg(&s->rpath, p, ':');
1440         } else if (link_option(option, "enable-new-dtags", &p)) {
1441             s->enable_new_dtags = 1;
1442         } else if (link_option(option, "section-alignment=", &p)) {
1443             s->section_align = strtoul(p, &end, 16);
1444         } else if (link_option(option, "soname=", &p)) {
1445             copy_linker_arg(&s->soname, p, 0);
1446 #ifdef TCC_TARGET_PE
1447         } else if (link_option(option, "large-address-aware", &p)) {
1448             s->pe_characteristics |= 0x20;
1449         } else if (link_option(option, "file-alignment=", &p)) {
1450             s->pe_file_align = strtoul(p, &end, 16);
1451         } else if (link_option(option, "stack=", &p)) {
1452             s->pe_stack_size = strtoul(p, &end, 10);
1453         } else if (link_option(option, "subsystem=", &p)) {
1454 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1455             if (!strcmp(p, "native")) {
1456                 s->pe_subsystem = 1;
1457             } else if (!strcmp(p, "console")) {
1458                 s->pe_subsystem = 3;
1459             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1460                 s->pe_subsystem = 2;
1461             } else if (!strcmp(p, "posix")) {
1462                 s->pe_subsystem = 7;
1463             } else if (!strcmp(p, "efiapp")) {
1464                 s->pe_subsystem = 10;
1465             } else if (!strcmp(p, "efiboot")) {
1466                 s->pe_subsystem = 11;
1467             } else if (!strcmp(p, "efiruntime")) {
1468                 s->pe_subsystem = 12;
1469             } else if (!strcmp(p, "efirom")) {
1470                 s->pe_subsystem = 13;
1471 #elif defined(TCC_TARGET_ARM)
1472             if (!strcmp(p, "wince")) {
1473                 s->pe_subsystem = 9;
1474 #endif
1475             } else
1476                 goto err;
1477 #endif
1478         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1479             if (ret > 0)
1480                 s->filetype |= AFF_WHOLE_ARCHIVE;
1481             else
1482                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1483         } else if (p) {
1484             return 0;
1485         } else {
1486     err:
1487             tcc_error("unsupported linker option '%s'", option);
1488         }
1489
1490         if (ignoring && s->warn_unsupported)
1491             tcc_warning("unsupported linker option '%s'", option);
1492
1493         option = skip_linker_arg(&p);
1494     }
1495     return 1;
1496 }
1497
1498 typedef struct TCCOption {
1499     const char *name;
1500     uint16_t index;
1501     uint16_t flags;
1502 } TCCOption;
1503
1504 enum {
1505     TCC_OPTION_HELP,
1506     TCC_OPTION_HELP2,
1507     TCC_OPTION_v,
1508     TCC_OPTION_I,
1509     TCC_OPTION_D,
1510     TCC_OPTION_U,
1511     TCC_OPTION_P,
1512     TCC_OPTION_L,
1513     TCC_OPTION_B,
1514     TCC_OPTION_l,
1515     TCC_OPTION_bench,
1516     TCC_OPTION_bt,
1517     TCC_OPTION_b,
1518     TCC_OPTION_ba,
1519     TCC_OPTION_g,
1520     TCC_OPTION_c,
1521     TCC_OPTION_dumpversion,
1522     TCC_OPTION_d,
1523     TCC_OPTION_static,
1524     TCC_OPTION_std,
1525     TCC_OPTION_shared,
1526     TCC_OPTION_soname,
1527     TCC_OPTION_o,
1528     TCC_OPTION_r,
1529     TCC_OPTION_s,
1530     TCC_OPTION_traditional,
1531     TCC_OPTION_Wl,
1532     TCC_OPTION_Wp,
1533     TCC_OPTION_W,
1534     TCC_OPTION_O,
1535     TCC_OPTION_mfloat_abi,
1536     TCC_OPTION_m,
1537     TCC_OPTION_f,
1538     TCC_OPTION_isystem,
1539     TCC_OPTION_iwithprefix,
1540     TCC_OPTION_include,
1541     TCC_OPTION_nostdinc,
1542     TCC_OPTION_nostdlib,
1543     TCC_OPTION_print_search_dirs,
1544     TCC_OPTION_rdynamic,
1545     TCC_OPTION_param,
1546     TCC_OPTION_pedantic,
1547     TCC_OPTION_pthread,
1548     TCC_OPTION_run,
1549     TCC_OPTION_w,
1550     TCC_OPTION_pipe,
1551     TCC_OPTION_E,
1552     TCC_OPTION_MD,
1553     TCC_OPTION_MF,
1554     TCC_OPTION_x,
1555     TCC_OPTION_ar,
1556     TCC_OPTION_impdef
1557 };
1558
1559 #define TCC_OPTION_HAS_ARG 0x0001
1560 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1561
1562 static const TCCOption tcc_options[] = {
1563     { "h", TCC_OPTION_HELP, 0 },
1564     { "-help", TCC_OPTION_HELP, 0 },
1565     { "?", TCC_OPTION_HELP, 0 },
1566     { "hh", TCC_OPTION_HELP2, 0 },
1567     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1568     { "-version", TCC_OPTION_v, 0 }, /* handle as verbose, also prints version*/
1569     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1570     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1571     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1572     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1573     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1574     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1575     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1576     { "bench", TCC_OPTION_bench, 0 },
1577 #ifdef CONFIG_TCC_BACKTRACE
1578     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1579 #endif
1580 #ifdef CONFIG_TCC_BCHECK
1581     { "b", TCC_OPTION_b, 0 },
1582 #endif
1583     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1584     { "c", TCC_OPTION_c, 0 },
1585     { "dumpversion", TCC_OPTION_dumpversion, 0},
1586     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1587     { "static", TCC_OPTION_static, 0 },
1588     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1589     { "shared", TCC_OPTION_shared, 0 },
1590     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1591     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1592     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1593     { "pedantic", TCC_OPTION_pedantic, 0},
1594     { "pthread", TCC_OPTION_pthread, 0},
1595     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1596     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1597     { "r", TCC_OPTION_r, 0 },
1598     { "s", TCC_OPTION_s, 0 },
1599     { "traditional", TCC_OPTION_traditional, 0 },
1600     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1601     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1602     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1603     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1604 #ifdef TCC_TARGET_ARM
1605     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1606 #endif
1607     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1608     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1609     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1610     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1611     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1612     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1613     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1614     { "w", TCC_OPTION_w, 0 },
1615     { "pipe", TCC_OPTION_pipe, 0},
1616     { "E", TCC_OPTION_E, 0},
1617     { "MD", TCC_OPTION_MD, 0},
1618     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1619     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1620     { "ar", TCC_OPTION_ar, 0},
1621 #ifdef TCC_TARGET_PE
1622     { "impdef", TCC_OPTION_impdef, 0},
1623 #endif
1624     { NULL, 0, 0 },
1625 };
1626
1627 static const FlagDef options_W[] = {
1628     { 0, 0, "all" },
1629     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1630     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1631     { offsetof(TCCState, warn_error), 0, "error" },
1632     { offsetof(TCCState, warn_gcc_compat), 0, "gcc-compat" },
1633     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1634       "implicit-function-declaration" },
1635     { 0, 0, NULL }
1636 };
1637
1638 static const FlagDef options_f[] = {
1639     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1640     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1641     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1642     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1643     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1644     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1645     { 0, 0, NULL }
1646 };
1647
1648 static const FlagDef options_m[] = {
1649     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1650 #ifdef TCC_TARGET_X86_64
1651     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1652 #endif
1653     { 0, 0, NULL }
1654 };
1655
1656 static void parse_option_D(TCCState *s1, const char *optarg)
1657 {
1658     char *sym = tcc_strdup(optarg);
1659     char *value = strchr(sym, '=');
1660     if (value)
1661         *value++ = '\0';
1662     tcc_define_symbol(s1, sym, value);
1663     tcc_free(sym);
1664 }
1665
1666 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1667 {
1668     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1669     f->type = filetype;
1670     strcpy(f->name, filename);
1671     dynarray_add(&s->files, &s->nb_files, f);
1672 }
1673
1674 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1675 {
1676     int ret = 0, q, c;
1677     CString str;
1678     for(;;) {
1679         while (c = (unsigned char)*r, c && c <= ' ')
1680           ++r;
1681         if (c == 0)
1682             break;
1683         q = 0;
1684         cstr_new(&str);
1685         while (c = (unsigned char)*r, c) {
1686             ++r;
1687             if (c == '\\' && (*r == '"' || *r == '\\')) {
1688                 c = *r++;
1689             } else if (c == '"') {
1690                 q = !q;
1691                 continue;
1692             } else if (q == 0 && c <= ' ') {
1693                 break;
1694             }
1695             cstr_ccat(&str, c);
1696         }
1697         cstr_ccat(&str, 0);
1698         //printf("<%s>\n", str.data), fflush(stdout);
1699         dynarray_add(argv, argc, tcc_strdup(str.data));
1700         cstr_free(&str);
1701         ++ret;
1702     }
1703     return ret;
1704 }
1705
1706 /* read list file */
1707 static void args_parser_listfile(TCCState *s,
1708     const char *filename, int optind, int *pargc, char ***pargv)
1709 {
1710     TCCState *s1 = s;
1711     int fd, i;
1712     size_t len;
1713     char *p;
1714     int argc = 0;
1715     char **argv = NULL;
1716
1717     fd = open(filename, O_RDONLY | O_BINARY);
1718     if (fd < 0)
1719         tcc_error("listfile '%s' not found", filename);
1720
1721     len = lseek(fd, 0, SEEK_END);
1722     p = tcc_malloc(len + 1), p[len] = 0;
1723     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1724
1725     for (i = 0; i < *pargc; ++i)
1726         if (i == optind)
1727             args_parser_make_argv(p, &argc, &argv);
1728         else
1729             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1730
1731     tcc_free(p);
1732     dynarray_reset(&s->argv, &s->argc);
1733     *pargc = s->argc = argc, *pargv = s->argv = argv;
1734 }
1735
1736 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1737 {
1738     TCCState *s1 = s;
1739     const TCCOption *popt;
1740     const char *optarg, *r;
1741     const char *run = NULL;
1742     int x;
1743     CString linker_arg; /* collect -Wl options */
1744     int tool = 0, arg_start = 0, noaction = optind;
1745     char **argv = *pargv;
1746     int argc = *pargc;
1747
1748     cstr_new(&linker_arg);
1749
1750     while (optind < argc) {
1751         r = argv[optind];
1752         if (r[0] == '@' && r[1] != '\0') {
1753             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1754             continue;
1755         }
1756         optind++;
1757         if (tool) {
1758             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1759                 ++s->verbose;
1760             continue;
1761         }
1762 reparse:
1763         if (r[0] != '-' || r[1] == '\0') {
1764             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1765                 args_parser_add_file(s, r, s->filetype);
1766             if (run) {
1767                 tcc_set_options(s, run);
1768                 arg_start = optind - 1;
1769                 break;
1770             }
1771             continue;
1772         }
1773
1774         /* find option in table */
1775         for(popt = tcc_options; ; ++popt) {
1776             const char *p1 = popt->name;
1777             const char *r1 = r + 1;
1778             if (p1 == NULL)
1779                 tcc_error("invalid option -- '%s'", r);
1780             if (!strstart(p1, &r1))
1781                 continue;
1782             optarg = r1;
1783             if (popt->flags & TCC_OPTION_HAS_ARG) {
1784                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1785                     if (optind >= argc)
1786                 arg_err:
1787                         tcc_error("argument to '%s' is missing", r);
1788                     optarg = argv[optind++];
1789                 }
1790             } else if (*r1 != '\0')
1791                 continue;
1792             break;
1793         }
1794
1795         switch(popt->index) {
1796         case TCC_OPTION_HELP:
1797             x = OPT_HELP;
1798             goto extra_action;
1799         case TCC_OPTION_HELP2:
1800             x = OPT_HELP2;
1801             goto extra_action;
1802         case TCC_OPTION_I:
1803             tcc_add_include_path(s, optarg);
1804             break;
1805         case TCC_OPTION_D:
1806             parse_option_D(s, optarg);
1807             break;
1808         case TCC_OPTION_U:
1809             tcc_undefine_symbol(s, optarg);
1810             break;
1811         case TCC_OPTION_L:
1812             tcc_add_library_path(s, optarg);
1813             break;
1814         case TCC_OPTION_B:
1815             /* set tcc utilities path (mainly for tcc development) */
1816             tcc_set_lib_path(s, optarg);
1817             break;
1818         case TCC_OPTION_l:
1819             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1820             s->nb_libraries++;
1821             break;
1822         case TCC_OPTION_pthread:
1823             s->option_pthread = 1;
1824             break;
1825         case TCC_OPTION_bench:
1826             s->do_bench = 1;
1827             break;
1828 #ifdef CONFIG_TCC_BACKTRACE
1829         case TCC_OPTION_bt:
1830             s->rt_num_callers = atoi(optarg);
1831             s->do_backtrace = 1;
1832             s->do_debug = 1;
1833             break;
1834 #endif
1835 #ifdef CONFIG_TCC_BCHECK
1836         case TCC_OPTION_b:
1837             s->do_bounds_check = 1;
1838             s->do_backtrace = 1;
1839             s->do_debug = 1;
1840             break;
1841 #endif
1842         case TCC_OPTION_g:
1843             s->do_debug = 1;
1844             break;
1845         case TCC_OPTION_c:
1846             x = TCC_OUTPUT_OBJ;
1847         set_output_type:
1848             if (s->output_type)
1849                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1850             s->output_type = x;
1851             break;
1852         case TCC_OPTION_d:
1853             if (*optarg == 'D')
1854                 s->dflag = 3;
1855             else if (*optarg == 'M')
1856                 s->dflag = 7;
1857             else if (*optarg == 't')
1858                 s->dflag = 16;
1859             else if (isnum(*optarg))
1860                 s->g_debug |= atoi(optarg);
1861             else
1862                 goto unsupported_option;
1863             break;
1864         case TCC_OPTION_static:
1865             s->static_link = 1;
1866             break;
1867         case TCC_OPTION_std:
1868             if (strcmp(optarg, "=c11") == 0)
1869                 s->cversion = 201112;
1870             break;
1871         case TCC_OPTION_shared:
1872             x = TCC_OUTPUT_DLL;
1873             goto set_output_type;
1874         case TCC_OPTION_soname:
1875             s->soname = tcc_strdup(optarg);
1876             break;
1877         case TCC_OPTION_o:
1878             if (s->outfile) {
1879                 tcc_warning("multiple -o option");
1880                 tcc_free(s->outfile);
1881             }
1882             s->outfile = tcc_strdup(optarg);
1883             break;
1884         case TCC_OPTION_r:
1885             /* generate a .o merging several output files */
1886             s->option_r = 1;
1887             x = TCC_OUTPUT_OBJ;
1888             goto set_output_type;
1889         case TCC_OPTION_isystem:
1890             tcc_add_sysinclude_path(s, optarg);
1891             break;
1892         case TCC_OPTION_include:
1893             cstr_printf(&s->cmdline_incl, "#include \"%s\"\n", optarg);
1894             break;
1895         case TCC_OPTION_nostdinc:
1896             s->nostdinc = 1;
1897             break;
1898         case TCC_OPTION_nostdlib:
1899             s->nostdlib = 1;
1900             break;
1901         case TCC_OPTION_run:
1902 #ifndef TCC_IS_NATIVE
1903             tcc_error("-run is not available in a cross compiler");
1904 #endif
1905             run = optarg;
1906             x = TCC_OUTPUT_MEMORY;
1907             goto set_output_type;
1908         case TCC_OPTION_v:
1909             do ++s->verbose; while (*optarg++ == 'v');
1910             ++noaction;
1911             break;
1912         case TCC_OPTION_f:
1913             if (set_flag(s, options_f, optarg) < 0)
1914                 goto unsupported_option;
1915             break;
1916 #ifdef TCC_TARGET_ARM
1917         case TCC_OPTION_mfloat_abi:
1918             /* tcc doesn't support soft float yet */
1919             if (!strcmp(optarg, "softfp")) {
1920                 s->float_abi = ARM_SOFTFP_FLOAT;
1921                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1922             } else if (!strcmp(optarg, "hard"))
1923                 s->float_abi = ARM_HARD_FLOAT;
1924             else
1925                 tcc_error("unsupported float abi '%s'", optarg);
1926             break;
1927 #endif
1928         case TCC_OPTION_m:
1929             if (set_flag(s, options_m, optarg) < 0) {
1930                 if (x = atoi(optarg), x != 32 && x != 64)
1931                     goto unsupported_option;
1932                 if (PTR_SIZE != x/8)
1933                     return x;
1934                 ++noaction;
1935             }
1936             break;
1937         case TCC_OPTION_W:
1938             s->warn_none = 0;
1939             if (optarg[0] && set_flag(s, options_W, optarg) < 0)
1940                 goto unsupported_option;
1941             break;
1942         case TCC_OPTION_w:
1943             s->warn_none = 1;
1944             break;
1945         case TCC_OPTION_rdynamic:
1946             s->rdynamic = 1;
1947             break;
1948         case TCC_OPTION_Wl:
1949             if (linker_arg.size)
1950                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1951             cstr_cat(&linker_arg, optarg, 0);
1952             if (tcc_set_linker(s, linker_arg.data))
1953                 cstr_free(&linker_arg);
1954             break;
1955         case TCC_OPTION_Wp:
1956             r = optarg;
1957             goto reparse;
1958         case TCC_OPTION_E:
1959             x = TCC_OUTPUT_PREPROCESS;
1960             goto set_output_type;
1961         case TCC_OPTION_P:
1962             s->Pflag = atoi(optarg) + 1;
1963             break;
1964         case TCC_OPTION_MD:
1965             s->gen_deps = 1;
1966             break;
1967         case TCC_OPTION_MF:
1968             s->deps_outfile = tcc_strdup(optarg);
1969             break;
1970         case TCC_OPTION_dumpversion:
1971             printf ("%s\n", TCC_VERSION);
1972             exit(0);
1973             break;
1974         case TCC_OPTION_x:
1975             x = 0;
1976             if (*optarg == 'c')
1977                 x = AFF_TYPE_C;
1978             else if (*optarg == 'a')
1979                 x = AFF_TYPE_ASMPP;
1980             else if (*optarg == 'b')
1981                 x = AFF_TYPE_BIN;
1982             else if (*optarg == 'n')
1983                 x = AFF_TYPE_NONE;
1984             else
1985                 tcc_warning("unsupported language '%s'", optarg);
1986             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
1987             break;
1988         case TCC_OPTION_O:
1989             s->optimize = atoi(optarg);
1990             break;
1991         case TCC_OPTION_print_search_dirs:
1992             x = OPT_PRINT_DIRS;
1993             goto extra_action;
1994         case TCC_OPTION_impdef:
1995             x = OPT_IMPDEF;
1996             goto extra_action;
1997         case TCC_OPTION_ar:
1998             x = OPT_AR;
1999         extra_action:
2000             arg_start = optind - 1;
2001             if (arg_start != noaction)
2002                 tcc_error("cannot parse %s here", r);
2003             tool = x;
2004             break;
2005         case TCC_OPTION_traditional:
2006         case TCC_OPTION_pedantic:
2007         case TCC_OPTION_pipe:
2008         case TCC_OPTION_s:
2009             /* ignored */
2010             break;
2011         default:
2012 unsupported_option:
2013             if (s->warn_unsupported)
2014                 tcc_warning("unsupported option '%s'", r);
2015             break;
2016         }
2017     }
2018     if (linker_arg.size) {
2019         r = linker_arg.data;
2020         goto arg_err;
2021     }
2022     *pargc = argc - arg_start;
2023     *pargv = argv + arg_start;
2024     if (tool)
2025         return tool;
2026     if (optind != noaction)
2027         return 0;
2028     if (s->verbose == 2)
2029         return OPT_PRINT_DIRS;
2030     if (s->verbose)
2031         return OPT_V;
2032     return OPT_HELP;
2033 }
2034
2035 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
2036 {
2037     char **argv = NULL;
2038     int argc = 0;
2039     args_parser_make_argv(r, &argc, &argv);
2040     tcc_parse_args(s, &argc, &argv, 0);
2041     dynarray_reset(&argv, &argc);
2042 }
2043
2044 PUB_FUNC void tcc_print_stats(TCCState *s1, unsigned total_time)
2045 {
2046     if (total_time < 1)
2047         total_time = 1;
2048     if (total_bytes < 1)
2049         total_bytes = 1;
2050     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
2051                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
2052            total_idents, total_lines, total_bytes,
2053            (double)total_time/1000,
2054            (unsigned)total_lines*1000/total_time,
2055            (double)total_bytes/1000/total_time);
2056 #ifdef MEM_DEBUG
2057     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
2058 #endif
2059 }