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 #elif defined(TCC_TARGET_C67)
  38 #include "c67-gen.c"
  39 #include "c67-link.c"
  40 #include "tcccoff.c"
  41 #elif defined(TCC_TARGET_X86_64)
  42 #include "x86_64-gen.c"
  43 #include "x86_64-link.c"
  44 #include "i386-asm.c"
  45 #elif defined(TCC_TARGET_RISCV64)
  46 #include "riscv64-gen.c"
  47 #include "riscv64-link.c"
  48 #else
  49 #error unknown target
  50 #endif
  51 #ifdef CONFIG_TCC_ASM
  52 #include "tccasm.c"
  53 #endif
  54 #ifdef TCC_TARGET_PE
  55 #include "tccpe.c"
  56 #endif
  57 #endif /* ONE_SOURCE */
  58
  59 #include "tcc.h"
  60
  61 /********************************************************/
  62 /* global variables */
  63
  64 /* XXX: get rid of this ASAP (or maybe not) */
  65 ST_DATA struct TCCState *tcc_state;
  66
  67 #ifdef MEM_DEBUG
  68 static int nb_states;
  69 #endif
  70
  71 /********************************************************/
  72 #ifdef _WIN32
  73 ST_FUNC char *normalize_slashes(char *path)
  74 {
  75     char *p;
  76     for (p = path; *p; ++p)
  77         if (*p == '\\')
  78             *p = '/';
  79     return path;
  80 }
  81
  82 static HMODULE tcc_module;
  83
  84 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  85 static void tcc_set_lib_path_w32(TCCState *s)
  86 {
  87     char path[1024], *p;
  88     GetModuleFileNameA(tcc_module, path, sizeof path);
  89     p = tcc_basename(normalize_slashes(strlwr(path)));
  90     if (p > path)
  91         --p;
  92     *p = 0;
  93     tcc_set_lib_path(s, path);
  94 }
  95
  96 #ifdef TCC_TARGET_PE
  97 static void tcc_add_systemdir(TCCState *s)
  98 {
  99     char buf[1000];
 100     GetSystemDirectory(buf, sizeof buf);
 101     tcc_add_library_path(s, normalize_slashes(buf));
 102 }
 103 #endif
 104
 105 #ifdef LIBTCC_AS_DLL
 106 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 107 {
 108     if (DLL_PROCESS_ATTACH == dwReason)
 109         tcc_module = hDll;
 110     return TRUE;
 111 }
 112 #endif
 113 #endif
 114
 115 /********************************************************/
 116 #ifndef CONFIG_TCC_SEMLOCK
 117 #define WAIT_SEM()
 118 #define POST_SEM()
 119 #elif defined _WIN32
 120 static int tcc_sem_init;
 121 static CRITICAL_SECTION tcc_cr;
 122 static void wait_sem(void)
 123 {
 124     if (!tcc_sem_init)
 125         InitializeCriticalSection(&tcc_cr), tcc_sem_init = 1;
 126     EnterCriticalSection(&tcc_cr);
 127 }
 128 #define WAIT_SEM() wait_sem()
 129 #define POST_SEM() LeaveCriticalSection(&tcc_cr);
 130 #else
 131 #include <semaphore.h>
 132 static int tcc_sem_init;
 133 static sem_t tcc_sem;
 134 static void wait_sem(void)
 135 {
 136     if (!tcc_sem_init)
 137         sem_init(&tcc_sem, 0, 1), tcc_sem_init = 1;
 138     while (sem_wait (&tcc_sem) < 0 && errno == EINTR);
 139 }
 140 #define WAIT_SEM() wait_sem()
 141 #define POST_SEM() sem_post(&tcc_sem)
 142 #endif
 143
 144 /********************************************************/
 145 /* copy a string and truncate it. */
 146 ST_FUNC char *pstrcpy(char *buf, size_t buf_size, const char *s)
 147 {
 148     char *q, *q_end;
 149     int c;
 150
 151     if (buf_size > 0) {
 152         q = buf;
 153         q_end = buf + buf_size - 1;
 154         while (q < q_end) {
 155             c = *s++;
 156             if (c == '\0')
 157                 break;
 158             *q++ = c;
 159         }
 160         *q = '\0';
 161     }
 162     return buf;
 163 }
 164
 165 /* strcat and truncate. */
 166 ST_FUNC char *pstrcat(char *buf, size_t buf_size, const char *s)
 167 {
 168     size_t len;
 169     len = strlen(buf);
 170     if (len < buf_size)
 171         pstrcpy(buf + len, buf_size - len, s);
 172     return buf;
 173 }
 174
 175 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 176 {
 177     memcpy(out, in, num);
 178     out[num] = '\0';
 179     return out;
 180 }
 181
 182 /* extract the basename of a file */
 183 PUB_FUNC char *tcc_basename(const char *name)
 184 {
 185     char *p = strchr(name, 0);
 186     while (p > name && !IS_DIRSEP(p[-1]))
 187         --p;
 188     return p;
 189 }
 190
 191 /* extract extension part of a file
 192  *
 193  * (if no extension, return pointer to end-of-string)
 194  */
 195 PUB_FUNC char *tcc_fileextension (const char *name)
 196 {
 197     char *b = tcc_basename(name);
 198     char *e = strrchr(b, '.');
 199     return e ? e : strchr(b, 0);
 200 }
 201
 202 /********************************************************/
 203 /* memory management */
 204
 205 #undef free
 206 #undef malloc
 207 #undef realloc
 208
 209 #ifndef MEM_DEBUG
 210
 211 PUB_FUNC void tcc_free(void *ptr)
 212 {
 213     free(ptr);
 214 }
 215
 216 PUB_FUNC void *tcc_malloc(unsigned long size)
 217 {
 218     void *ptr;
 219     ptr = malloc(size);
 220     if (!ptr && size)
 221         _tcc_error("memory full (malloc)");
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_mallocz(unsigned long size)
 226 {
 227     void *ptr;
 228     ptr = tcc_malloc(size);
 229     memset(ptr, 0, size);
 230     return ptr;
 231 }
 232
 233 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 234 {
 235     void *ptr1;
 236     ptr1 = realloc(ptr, size);
 237     if (!ptr1 && size)
 238         _tcc_error("memory full (realloc)");
 239     return ptr1;
 240 }
 241
 242 PUB_FUNC char *tcc_strdup(const char *str)
 243 {
 244     char *ptr;
 245     ptr = tcc_malloc(strlen(str) + 1);
 246     strcpy(ptr, str);
 247     return ptr;
 248 }
 249
 250 #else
 251
 252 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 253 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 254 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 255 #define MEM_DEBUG_FILE_LEN 40
 256 #define MEM_DEBUG_CHECK3(header) \
 257     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 258 #define MEM_USER_PTR(header) \
 259     ((char *)header + offsetof(mem_debug_header_t, magic3))
 260 #define MEM_HEADER_PTR(ptr) \
 261     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 262
 263 struct mem_debug_header {
 264     unsigned magic1;
 265     unsigned size;
 266     struct mem_debug_header *prev;
 267     struct mem_debug_header *next;
 268     int line_num;
 269     char file_name[MEM_DEBUG_FILE_LEN + 1];
 270     unsigned magic2;
 271     ALIGNED(16) unsigned magic3;
 272 };
 273
 274 typedef struct mem_debug_header mem_debug_header_t;
 275
 276 static mem_debug_header_t *mem_debug_chain;
 277 static unsigned mem_cur_size;
 278 static unsigned mem_max_size;
 279
 280 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 281 {
 282     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 283     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 284         header->magic2 != MEM_DEBUG_MAGIC2 ||
 285         MEM_DEBUG_CHECK3(header) != MEM_DEBUG_MAGIC3 ||
 286         header->size == (unsigned)-1) {
 287         fprintf(stderr, "%s check failed\n", msg);
 288         if (header->magic1 == MEM_DEBUG_MAGIC1)
 289             fprintf(stderr, "%s:%u: block allocated here.\n",
 290                 header->file_name, header->line_num);
 291         exit(1);
 292     }
 293     return header;
 294 }
 295
 296 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 297 {
 298     int ofs;
 299     mem_debug_header_t *header;
 300
 301     header = malloc(sizeof(mem_debug_header_t) + size);
 302     if (!header)
 303         _tcc_error("memory full (malloc)");
 304
 305     header->magic1 = MEM_DEBUG_MAGIC1;
 306     header->magic2 = MEM_DEBUG_MAGIC2;
 307     header->size = size;
 308     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 309     header->line_num = line;
 310     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 311     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 312     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 313
 314     header->next = mem_debug_chain;
 315     header->prev = NULL;
 316     if (header->next)
 317         header->next->prev = header;
 318     mem_debug_chain = header;
 319
 320     mem_cur_size += size;
 321     if (mem_cur_size > mem_max_size)
 322         mem_max_size = mem_cur_size;
 323
 324     return MEM_USER_PTR(header);
 325 }
 326
 327 PUB_FUNC void tcc_free_debug(void *ptr)
 328 {
 329     mem_debug_header_t *header;
 330     if (!ptr)
 331         return;
 332     header = malloc_check(ptr, "tcc_free");
 333     mem_cur_size -= header->size;
 334     header->size = (unsigned)-1;
 335     if (header->next)
 336         header->next->prev = header->prev;
 337     if (header->prev)
 338         header->prev->next = header->next;
 339     if (header == mem_debug_chain)
 340         mem_debug_chain = header->next;
 341     free(header);
 342 }
 343
 344 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 345 {
 346     void *ptr;
 347     ptr = tcc_malloc_debug(size,file,line);
 348     memset(ptr, 0, size);
 349     return ptr;
 350 }
 351
 352 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 353 {
 354     mem_debug_header_t *header;
 355     int mem_debug_chain_update = 0;
 356     if (!ptr)
 357         return tcc_malloc_debug(size, file, line);
 358     header = malloc_check(ptr, "tcc_realloc");
 359     mem_cur_size -= header->size;
 360     mem_debug_chain_update = (header == mem_debug_chain);
 361     header = realloc(header, sizeof(mem_debug_header_t) + size);
 362     if (!header)
 363         _tcc_error("memory full (realloc)");
 364     header->size = size;
 365     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 366     if (header->next)
 367         header->next->prev = header;
 368     if (header->prev)
 369         header->prev->next = header;
 370     if (mem_debug_chain_update)
 371         mem_debug_chain = header;
 372     mem_cur_size += size;
 373     if (mem_cur_size > mem_max_size)
 374         mem_max_size = mem_cur_size;
 375     return MEM_USER_PTR(header);
 376 }
 377
 378 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 379 {
 380     char *ptr;
 381     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 382     strcpy(ptr, str);
 383     return ptr;
 384 }
 385
 386 PUB_FUNC void tcc_memcheck(void)
 387 {
 388     if (mem_cur_size) {
 389         mem_debug_header_t *header = mem_debug_chain;
 390         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 391             mem_cur_size, mem_max_size);
 392         while (header) {
 393             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 394                 header->file_name, header->line_num, header->size);
 395             header = header->next;
 396         }
 397 #if MEM_DEBUG-0 == 2
 398         exit(2);
 399 #endif
 400     }
 401 }
 402 #endif /* MEM_DEBUG */
 403
 404 #define free(p) use_tcc_free(p)
 405 #define malloc(s) use_tcc_malloc(s)
 406 #define realloc(p, s) use_tcc_realloc(p, s)
 407
 408 /********************************************************/
 409 /* dynarrays */
 410
 411 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 412 {
 413     int nb, nb_alloc;
 414     void **pp;
 415
 416     nb = *nb_ptr;
 417     pp = *(void ***)ptab;
 418     /* every power of two we double array size */
 419     if ((nb & (nb - 1)) == 0) {
 420         if (!nb)
 421             nb_alloc = 1;
 422         else
 423             nb_alloc = nb * 2;
 424         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 425         *(void***)ptab = pp;
 426     }
 427     pp[nb++] = data;
 428     *nb_ptr = nb;
 429 }
 430
 431 ST_FUNC void dynarray_reset(void *pp, int *n)
 432 {
 433     void **p;
 434     for (p = *(void***)pp; *n; ++p, --*n)
 435         if (*p)
 436             tcc_free(*p);
 437     tcc_free(*(void**)pp);
 438     *(void**)pp = NULL;
 439 }
 440
 441 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 442 {
 443     const char *p;
 444     do {
 445         int c;
 446         CString str;
 447
 448         cstr_new(&str);
 449         for (p = in; c = *p, c != '\0' && c != PATHSEP[0]; ++p) {
 450             if (c == '{' && p[1] && p[2] == '}') {
 451                 c = p[1], p += 2;
 452                 if (c == 'B')
 453                     cstr_cat(&str, s->tcc_lib_path, -1);
 454                 if (c == 'f' && file) {
 455                     /* substitute current file's dir */
 456                     const char *f = file->true_filename;
 457                     const char *b = tcc_basename(f);
 458                     if (b > f)
 459                         cstr_cat(&str, f, b - f - 1);
 460                     else
 461                         cstr_cat(&str, ".", 1);
 462                 }
 463             } else {
 464                 cstr_ccat(&str, c);
 465             }
 466         }
 467         if (str.size) {
 468             cstr_ccat(&str, '\0');
 469             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 470         }
 471         cstr_free(&str);
 472         in = p+1;
 473     } while (*p);
 474 }
 475
 476 /********************************************************/
 477
 478 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 479 {
 480     int len;
 481     len = strlen(buf);
 482     vsnprintf(buf + len, buf_size - len, fmt, ap);
 483 }
 484
 485 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 486 {
 487     va_list ap;
 488     va_start(ap, fmt);
 489     strcat_vprintf(buf, buf_size, fmt, ap);
 490     va_end(ap);
 491 }
 492
 493 #define ERROR_WARN 0
 494 #define ERROR_NOABORT 1
 495 #define ERROR_ERROR 2
 496
 497 PUB_FUNC void tcc_enter_state(TCCState *s1)
 498 {
 499     WAIT_SEM();
 500     tcc_state = s1;
 501 }
 502
 503 static void error1(int mode, const char *fmt, va_list ap)
 504 {
 505     char buf[2048];
 506     BufferedFile **pf, *f;
 507     TCCState *s1 = tcc_state;
 508
 509     /* 's1->error_set_jmp_enabled' means that we're called from
 510         within the parser/generator and 'tcc_state' was already
 511         set (i.e. not by the function above).
 512
 513         Otherwise, 's1 = NULL' means we're called because of severe
 514         problems from tcc_malloc() which under normal conditions
 515         should never happen. */
 516
 517     if (s1 && !s1->error_set_jmp_enabled) {
 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     buf[0] = '\0';
 530     /* use upper file if inline ":asm:" or token ":paste:" */
 531     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 532      ;
 533     if (f) {
 534         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 535             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 536                 (*pf)->filename, (*pf)->line_num);
 537         if (s1->error_set_jmp_enabled) {
 538             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 539                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 540         } else {
 541             strcat_printf(buf, sizeof(buf), "%s: ",
 542                 f->filename);
 543         }
 544     } else {
 545         strcat_printf(buf, sizeof(buf), "tcc: ");
 546     }
 547     if (mode == ERROR_WARN)
 548         strcat_printf(buf, sizeof(buf), "warning: ");
 549     else
 550         strcat_printf(buf, sizeof(buf), "error: ");
 551     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 552     if (!s1 || !s1->error_func) {
 553         /* default case: stderr */
 554         if (s1 && s1->output_type == TCC_OUTPUT_PREPROCESS && s1->ppfp == stdout)
 555             /* print a newline during tcc -E */
 556             printf("\n"), fflush(stdout);
 557         fflush(stdout); /* flush -v output */
 558         fprintf(stderr, "%s\n", buf);
 559         fflush(stderr); /* print error/warning now (win32) */
 560     } else {
 561         s1->error_func(s1->error_opaque, buf);
 562     }
 563     if (s1) {
 564         if (mode != ERROR_WARN)
 565             s1->nb_errors++;
 566         if (mode != ERROR_ERROR)
 567             return;
 568         if (s1->error_set_jmp_enabled)
 569             longjmp(s1->error_jmp_buf, 1);
 570     }
 571     exit(1);
 572 }
 573
 574 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque, TCCErrorFunc error_func)
 575 {
 576     s->error_opaque = error_opaque;
 577     s->error_func = error_func;
 578 }
 579
 580 LIBTCCAPI TCCErrorFunc tcc_get_error_func(TCCState *s)
 581 {
 582     return s->error_func;
 583 }
 584
 585 LIBTCCAPI void *tcc_get_error_opaque(TCCState *s)
 586 {
 587     return s->error_opaque;
 588 }
 589
 590 /* error without aborting current compilation */
 591 PUB_FUNC void _tcc_error_noabort(const char *fmt, ...)
 592 {
 593     va_list ap;
 594     va_start(ap, fmt);
 595     error1(ERROR_NOABORT, fmt, ap);
 596     va_end(ap);
 597 }
 598
 599 PUB_FUNC void _tcc_error(const char *fmt, ...)
 600 {
 601     va_list ap;
 602     va_start(ap, fmt);
 603     for (;;) error1(ERROR_ERROR, fmt, ap);
 604 }
 605
 606 PUB_FUNC void _tcc_warning(const char *fmt, ...)
 607 {
 608     va_list ap;
 609     va_start(ap, fmt);
 610     error1(ERROR_WARN, fmt, ap);
 611     va_end(ap);
 612 }
 613
 614 /********************************************************/
 615 /* I/O layer */
 616
 617 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 618 {
 619     BufferedFile *bf;
 620     int buflen = initlen ? initlen : IO_BUF_SIZE;
 621
 622     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 623     bf->buf_ptr = bf->buffer;
 624     bf->buf_end = bf->buffer + initlen;
 625     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 626     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 627 #ifdef _WIN32
 628     normalize_slashes(bf->filename);
 629 #endif
 630     bf->true_filename = bf->filename;
 631     bf->line_num = 1;
 632     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 633     bf->fd = -1;
 634     bf->prev = file;
 635     file = bf;
 636     tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 637 }
 638
 639 ST_FUNC void tcc_close(void)
 640 {
 641     TCCState *s1 = tcc_state;
 642     BufferedFile *bf = file;
 643     if (bf->fd > 0) {
 644         close(bf->fd);
 645         total_lines += bf->line_num;
 646     }
 647     if (bf->true_filename != bf->filename)
 648         tcc_free(bf->true_filename);
 649     file = bf->prev;
 650     tcc_free(bf);
 651 }
 652
 653 static int _tcc_open(TCCState *s1, const char *filename)
 654 {
 655     int fd;
 656     if (strcmp(filename, "-") == 0)
 657         fd = 0, filename = "<stdin>";
 658     else
 659         fd = open(filename, O_RDONLY | O_BINARY);
 660     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 661         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 662                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 663     return fd;
 664 }
 665
 666 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 667 {
 668     int fd = _tcc_open(s1, filename);
 669     if (fd < 0)
 670         return -1;
 671     tcc_open_bf(s1, filename, 0);
 672     file->fd = fd;
 673     return 0;
 674 }
 675
 676 /* compile the file opened in 'file'. Return non zero if errors. */
 677 static int tcc_compile(TCCState *s1, int filetype, const char *str, int fd)
 678 {
 679     /* Here we enter the code section where we use the global variables for
 680        parsing and code generation (tccpp.c, tccgen.c, <target>-gen.c).
 681        Other threads need to wait until we're done.
 682
 683        Alternatively we could use thread local storage for those global
 684        variables, which may or may not have advantages */
 685
 686     WAIT_SEM();
 687     tcc_state = s1;
 688
 689     if (setjmp(s1->error_jmp_buf) == 0) {
 690         int is_asm;
 691         s1->error_set_jmp_enabled = 1;
 692         s1->nb_errors = 0;
 693
 694         if (fd == -1) {
 695             int len = strlen(str);
 696             tcc_open_bf(s1, "<string>", len);
 697             memcpy(file->buffer, str, len);
 698         } else {
 699             tcc_open_bf(s1, str, 0);
 700             file->fd = fd;
 701         }
 702
 703         is_asm = !!(filetype & (AFF_TYPE_ASM|AFF_TYPE_ASMPP));
 704         tccelf_begin_file(s1);
 705         preprocess_start(s1, is_asm);
 706         tccgen_init(s1);
 707         if (s1->output_type == TCC_OUTPUT_PREPROCESS) {
 708             tcc_preprocess(s1);
 709         } else if (is_asm) {
 710 #ifdef CONFIG_TCC_ASM
 711             tcc_assemble(s1, !!(filetype & AFF_TYPE_ASMPP));
 712 #else
 713             tcc_error_noabort("asm not supported");
 714 #endif
 715         } else {
 716             tccgen_compile(s1);
 717         }
 718     }
 719     s1->error_set_jmp_enabled = 0;
 720     tccgen_finish(s1);
 721     preprocess_end(s1);
 722     tccelf_end_file(s1);
 723
 724     tcc_state = NULL;
 725     POST_SEM();
 726     return s1->nb_errors != 0 ? -1 : 0;
 727 }
 728
 729 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 730 {
 731     return tcc_compile(s, s->filetype, str, -1);
 732 }
 733
 734 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 735 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 736 {
 737     if (!value)
 738         value = "1";
 739     cstr_printf(&s1->cmdline_defs, "#define %s %s\n", sym, value);
 740 }
 741
 742 /* undefine a preprocessor symbol */
 743 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 744 {
 745     cstr_printf(&s1->cmdline_defs, "#undef %s\n", sym);
 746 }
 747
 748
 749 LIBTCCAPI TCCState *tcc_new(void)
 750 {
 751     TCCState *s;
 752
 753     s = tcc_mallocz(sizeof(TCCState));
 754     if (!s)
 755         return NULL;
 756 #ifdef MEM_DEBUG
 757     ++nb_states;
 758 #endif
 759
 760 #undef gnu_ext
 761
 762     s->gnu_ext = 1;
 763     s->tcc_ext = 1;
 764     s->nocommon = 1;
 765     s->dollars_in_identifiers = 1; /*on by default like in gcc/clang*/
 766     s->cversion = 199901; /* default unless -std=c11 is supplied */
 767     s->warn_implicit_function_declaration = 1;
 768     s->ms_extensions = 1;
 769
 770 #ifdef CHAR_IS_UNSIGNED
 771     s->char_is_unsigned = 1;
 772 #endif
 773 #ifdef TCC_TARGET_I386
 774     s->seg_size = 32;
 775 #endif
 776     /* enable this if you want symbols with leading underscore on windows: */
 777 #if 0 /* def TCC_TARGET_PE */
 778     s->leading_underscore = 1;
 779 #endif
 780 #ifdef CONFIG_TCC_BACKTRACE
 781     s->rt_num_callers = 6;
 782 #endif
 783     s->ppfp = stdout;
 784     /* might be used in error() before preprocess_start() */
 785     s->include_stack_ptr = s->include_stack;
 786
 787     tccelf_new(s);
 788
 789 #ifdef _WIN32
 790     tcc_set_lib_path_w32(s);
 791 #else
 792     tcc_set_lib_path(s, CONFIG_TCCDIR);
 793 #endif
 794
 795     {
 796         /* define __TINYC__ 92X  */
 797         char buffer[32]; int a,b,c;
 798         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 799         sprintf(buffer, "%d", a*10000 + b*100 + c);
 800         tcc_define_symbol(s, "__TINYC__", buffer);
 801     }
 802
 803     /* standard defines */
 804     tcc_define_symbol(s, "__STDC__", NULL);
 805     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 806     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 807
 808     /* target defines */
 809 #if defined(TCC_TARGET_I386)
 810     tcc_define_symbol(s, "__i386__", NULL);
 811     tcc_define_symbol(s, "__i386", NULL);
 812     tcc_define_symbol(s, "i386", NULL);
 813 #elif defined(TCC_TARGET_X86_64)
 814     tcc_define_symbol(s, "__x86_64__", NULL);
 815 #elif defined(TCC_TARGET_ARM)
 816     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 817     tcc_define_symbol(s, "__arm_elf__", NULL);
 818     tcc_define_symbol(s, "__arm_elf", NULL);
 819     tcc_define_symbol(s, "arm_elf", NULL);
 820     tcc_define_symbol(s, "__arm__", NULL);
 821     tcc_define_symbol(s, "__arm", NULL);
 822     tcc_define_symbol(s, "arm", NULL);
 823     tcc_define_symbol(s, "__APCS_32__", NULL);
 824     tcc_define_symbol(s, "__ARMEL__", NULL);
 825 #if defined(TCC_ARM_EABI)
 826     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 827 #endif
 828 #if defined(TCC_ARM_HARDFLOAT)
 829     s->float_abi = ARM_HARD_FLOAT;
 830     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 831 #else
 832     s->float_abi = ARM_SOFTFP_FLOAT;
 833 #endif
 834 #elif defined(TCC_TARGET_ARM64)
 835     tcc_define_symbol(s, "__aarch64__", NULL);
 836 #elif defined TCC_TARGET_C67
 837     tcc_define_symbol(s, "__C67__", NULL);
 838 #elif defined TCC_TARGET_RISCV64
 839     tcc_define_symbol(s, "__riscv", NULL);
 840     tcc_define_symbol(s, "__riscv_xlen", "64");
 841     tcc_define_symbol(s, "__riscv_flen", "64");
 842     tcc_define_symbol(s, "__riscv_div", NULL);
 843     tcc_define_symbol(s, "__riscv_mul", NULL);
 844     tcc_define_symbol(s, "__riscv_fdiv", NULL);
 845     tcc_define_symbol(s, "__riscv_fsqrt", NULL);
 846     tcc_define_symbol(s, "__riscv_float_abi_double", NULL);
 847 #endif
 848
 849 #ifdef TCC_TARGET_PE
 850     tcc_define_symbol(s, "_WIN32", NULL);
 851     tcc_define_symbol(s, "__declspec(x)", "__attribute__((x))");
 852     tcc_define_symbol(s, "__cdecl", "");
 853 # ifdef TCC_TARGET_X86_64
 854     tcc_define_symbol(s, "_WIN64", NULL);
 855 # endif
 856 #else
 857     tcc_define_symbol(s, "__unix__", NULL);
 858     tcc_define_symbol(s, "__unix", NULL);
 859     tcc_define_symbol(s, "unix", NULL);
 860 # if defined(__linux__)
 861     tcc_define_symbol(s, "__linux__", NULL);
 862     tcc_define_symbol(s, "__linux", NULL);
 863 # endif
 864 # if defined(__FreeBSD__)
 865     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 866     /* No 'Thread Storage Local' on FreeBSD with tcc */
 867     tcc_define_symbol(s, "__NO_TLS", NULL);
 868 # endif
 869 # if defined(__FreeBSD_kernel__)
 870     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 871 # endif
 872 # if defined(__NetBSD__)
 873     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 874 # endif
 875 # if defined(__OpenBSD__)
 876     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 877 # endif
 878 #endif
 879
 880     /* TinyCC & gcc defines */
 881 #if PTR_SIZE == 4
 882     /* 32bit systems. */
 883     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
 884     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
 885     tcc_define_symbol(s, "__ILP32__", NULL);
 886 #elif LONG_SIZE == 4
 887     /* 64bit Windows. */
 888     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 889     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 890     tcc_define_symbol(s, "__LLP64__", NULL);
 891 #else
 892     /* Other 64bit systems. */
 893     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 894     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 895     tcc_define_symbol(s, "__LP64__", NULL);
 896 #endif
 897     tcc_define_symbol(s, "__SIZEOF_POINTER__", PTR_SIZE == 4 ? "4" : "8");
 898
 899 #ifdef TCC_TARGET_PE
 900     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 901     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 902 #else
 903     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 904     /* wint_t is unsigned int by default, but (signed) int on BSDs
 905        and unsigned short on windows.  Other OSes might have still
 906        other conventions, sigh.  */
 907 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 908   || defined(__NetBSD__) || defined(__OpenBSD__)
 909     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 910 #  ifdef __FreeBSD__
 911     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 912        that are unconditionally used in FreeBSDs other system headers :/ */
 913     tcc_define_symbol(s, "__GNUC__", "2");
 914     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 915     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 916 #  endif
 917 # else
 918     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 919     /* glibc defines */
 920     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 921         "name proto __asm__ (#alias)");
 922     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 923         "name proto __asm__ (#alias) __THROW");
 924 # endif
 925 # if defined(TCC_MUSL)
 926     tcc_define_symbol(s, "__DEFINED_va_list", "");
 927     tcc_define_symbol(s, "__DEFINED___isoc_va_list", "");
 928     tcc_define_symbol(s, "__isoc_va_list", "void *");
 929 # endif /* TCC_MUSL */
 930     /* Some GCC builtins that are simple to express as macros.  */
 931     tcc_define_symbol(s, "__builtin_extract_return_addr(x)", "x");
 932 #endif /* ndef TCC_TARGET_PE */
 933     return s;
 934 }
 935
 936 LIBTCCAPI void tcc_delete(TCCState *s1)
 937 {
 938     /* free sections */
 939     tccelf_delete(s1);
 940
 941     /* free library paths */
 942     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 943     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 944
 945     /* free include paths */
 946     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 947     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 948
 949     tcc_free(s1->tcc_lib_path);
 950     tcc_free(s1->soname);
 951     tcc_free(s1->rpath);
 952     tcc_free(s1->init_symbol);
 953     tcc_free(s1->fini_symbol);
 954     tcc_free(s1->outfile);
 955     tcc_free(s1->deps_outfile);
 956     dynarray_reset(&s1->files, &s1->nb_files);
 957     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 958     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 959     dynarray_reset(&s1->argv, &s1->argc);
 960
 961     cstr_free(&s1->cmdline_defs);
 962     cstr_free(&s1->cmdline_incl);
 963 #ifdef TCC_IS_NATIVE
 964     /* free runtime memory */
 965     tcc_run_free(s1);
 966 #endif
 967
 968     tcc_free(s1);
 969 #ifdef MEM_DEBUG
 970     if (0 == --nb_states)
 971         tcc_memcheck();
 972 #endif
 973 }
 974
 975 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 976 {
 977     s->output_type = output_type;
 978
 979     /* always elf for objects */
 980     if (output_type == TCC_OUTPUT_OBJ)
 981         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 982
 983     if (s->char_is_unsigned)
 984         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 985
 986     if (!s->nostdinc) {
 987         /* default include paths */
 988         /* -isystem paths have already been handled */
 989         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 990     }
 991
 992 #ifdef CONFIG_TCC_BCHECK
 993     if (s->do_bounds_check) {
 994         /* if bound checking, then add corresponding sections */
 995         tccelf_bounds_new(s);
 996         /* define symbol */
 997         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 998     }
 999 #endif
1000     if (s->do_debug) {
1001         /* add debug sections */
1002         tccelf_stab_new(s);
1003     }
1004
1005     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1006
1007 #ifdef TCC_TARGET_PE
1008 # ifdef _WIN32
1009     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
1010         tcc_add_systemdir(s);
1011 # endif
1012 #else
1013     /* paths for crt objects */
1014     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1015     /* add libc crt1/crti objects */
1016     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1017         !s->nostdlib) {
1018         if (output_type != TCC_OUTPUT_DLL)
1019             tcc_add_crt(s, "crt1.o");
1020         tcc_add_crt(s, "crti.o");
1021     }
1022 #endif
1023     return 0;
1024 }
1025
1026 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1027 {
1028     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
1029     return 0;
1030 }
1031
1032 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1033 {
1034     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1035     return 0;
1036 }
1037
1038 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1039 {
1040     int fd, ret;
1041
1042     /* open the file */
1043     fd = _tcc_open(s1, filename);
1044     if (fd < 0) {
1045         if (flags & AFF_PRINT_ERROR)
1046             tcc_error_noabort("file '%s' not found", filename);
1047         return -1;
1048     }
1049
1050     /* update target deps */
1051     dynarray_add(&s1->target_deps, &s1->nb_target_deps,
1052             tcc_strdup(filename));
1053
1054     if (flags & AFF_TYPE_BIN) {
1055         ElfW(Ehdr) ehdr;
1056         int obj_type;
1057
1058         obj_type = tcc_object_type(fd, &ehdr);
1059         lseek(fd, 0, SEEK_SET);
1060
1061 #ifdef TCC_TARGET_MACHO
1062         if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), ".dylib"))
1063             obj_type = AFF_BINTYPE_DYN;
1064 #endif
1065
1066         switch (obj_type) {
1067         case AFF_BINTYPE_REL:
1068             ret = tcc_load_object_file(s1, fd, 0);
1069             break;
1070 #ifndef TCC_TARGET_PE
1071         case AFF_BINTYPE_DYN:
1072             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1073                 ret = 0;
1074 #ifdef TCC_IS_NATIVE
1075                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1076                     ret = -1;
1077 #endif
1078             } else {
1079                 ret = tcc_load_dll(s1, fd, filename,
1080                                    (flags & AFF_REFERENCED_DLL) != 0);
1081             }
1082             break;
1083 #endif
1084         case AFF_BINTYPE_AR:
1085             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1086             break;
1087 #ifdef TCC_TARGET_COFF
1088         case AFF_BINTYPE_C67:
1089             ret = tcc_load_coff(s1, fd);
1090             break;
1091 #endif
1092         default:
1093 #ifdef TCC_TARGET_PE
1094             ret = pe_load_file(s1, filename, fd);
1095 #else
1096             /* as GNU ld, consider it is an ld script if not recognized */
1097             ret = tcc_load_ldscript(s1, fd);
1098 #endif
1099             if (ret < 0)
1100                 tcc_error_noabort("unrecognized file type");
1101             break;
1102         }
1103         close(fd);
1104     } else {
1105         ret = tcc_compile(s1, flags, filename, fd);
1106     }
1107     return ret;
1108 }
1109
1110 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1111 {
1112     int filetype = s->filetype;
1113     if (0 == (filetype & AFF_TYPE_MASK)) {
1114         /* use a file extension to detect a filetype */
1115         const char *ext = tcc_fileextension(filename);
1116         if (ext[0]) {
1117             ext++;
1118             if (!strcmp(ext, "S"))
1119                 filetype = AFF_TYPE_ASMPP;
1120             else if (!strcmp(ext, "s"))
1121                 filetype = AFF_TYPE_ASM;
1122             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1123                 filetype = AFF_TYPE_C;
1124             else
1125                 filetype |= AFF_TYPE_BIN;
1126         } else {
1127             filetype = AFF_TYPE_C;
1128         }
1129     }
1130     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1131 }
1132
1133 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1134 {
1135     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1136     return 0;
1137 }
1138
1139 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1140     const char *filename, int flags, char **paths, int nb_paths)
1141 {
1142     char buf[1024];
1143     int i;
1144
1145     for(i = 0; i < nb_paths; i++) {
1146         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1147         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1148             return 0;
1149     }
1150     return -1;
1151 }
1152
1153 /* find and load a dll. Return non zero if not found */
1154 /* XXX: add '-rpath' option support ? */
1155 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1156 {
1157     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1158         s->library_paths, s->nb_library_paths);
1159 }
1160
1161 #ifndef TCC_TARGET_PE
1162 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)
1163 {
1164     if (-1 == tcc_add_library_internal(s1, "%s/%s",
1165         filename, 0, s1->crt_paths, s1->nb_crt_paths))
1166         tcc_error_noabort("file '%s' not found", filename);
1167     return 0;
1168 }
1169 #endif
1170
1171 /* the library name is the same as the argument of the '-l' option */
1172 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1173 {
1174 #if defined TCC_TARGET_PE
1175     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1176     const char **pp = s->static_link ? libs + 4 : libs;
1177 #elif defined TCC_TARGET_MACHO
1178     const char *libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
1179     const char **pp = s->static_link ? libs + 1 : libs;
1180 #else
1181     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1182     const char **pp = s->static_link ? libs + 1 : libs;
1183 #endif
1184     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1185     while (*pp) {
1186         if (0 == tcc_add_library_internal(s, *pp,
1187             libraryname, flags, s->library_paths, s->nb_library_paths))
1188             return 0;
1189         ++pp;
1190     }
1191     return -1;
1192 }
1193
1194 PUB_FUNC int tcc_add_library_err(TCCState *s1, const char *libname)
1195 {
1196     int ret = tcc_add_library(s1, libname);
1197     if (ret < 0)
1198         tcc_error_noabort("library '%s' not found", libname);
1199     return ret;
1200 }
1201
1202 /* handle #pragma comment(lib,) */
1203 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1204 {
1205     int i;
1206     for (i = 0; i < s1->nb_pragma_libs; i++)
1207         tcc_add_library_err(s1, s1->pragma_libs[i]);
1208 }
1209
1210 LIBTCCAPI int tcc_add_symbol(TCCState *s1, const char *name, const void *val)
1211 {
1212 #ifdef TCC_TARGET_PE
1213     /* On x86_64 'val' might not be reachable with a 32bit offset.
1214        So it is handled here as if it were in a DLL. */
1215     pe_putimport(s1, 0, name, (uintptr_t)val);
1216 #else
1217     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1218         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1219         SHN_ABS, name);
1220 #endif
1221     return 0;
1222 }
1223
1224 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1225 {
1226     tcc_free(s->tcc_lib_path);
1227     s->tcc_lib_path = tcc_strdup(path);
1228 }
1229
1230 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1231 #define FD_INVERT 0x0002 /* invert value before storing */
1232
1233 typedef struct FlagDef {
1234     uint16_t offset;
1235     uint16_t flags;
1236     const char *name;
1237 } FlagDef;
1238
1239 static int no_flag(const char **pp)
1240 {
1241     const char *p = *pp;
1242     if (*p != 'n' || *++p != 'o' || *++p != '-')
1243         return 0;
1244     *pp = p + 1;
1245     return 1;
1246 }
1247
1248 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1249 {
1250     int value, ret;
1251     const FlagDef *p;
1252     const char *r;
1253
1254     value = 1;
1255     r = name;
1256     if (no_flag(&r))
1257         value = 0;
1258
1259     for (ret = -1, p = flags; p->name; ++p) {
1260         if (ret) {
1261             if (strcmp(r, p->name))
1262                 continue;
1263         } else {
1264             if (0 == (p->flags & WD_ALL))
1265                 continue;
1266         }
1267         if (p->offset) {
1268             *((unsigned char *)s + p->offset) =
1269                 p->flags & FD_INVERT ? !value : value;
1270             if (ret)
1271                 return 0;
1272         } else {
1273             ret = 0;
1274         }
1275     }
1276     return ret;
1277 }
1278
1279 static int strstart(const char *val, const char **str)
1280 {
1281     const char *p, *q;
1282     p = *str;
1283     q = val;
1284     while (*q) {
1285         if (*p != *q)
1286             return 0;
1287         p++;
1288         q++;
1289     }
1290     *str = p;
1291     return 1;
1292 }
1293
1294 /* Like strstart, but automatically takes into account that ld options can
1295  *
1296  * - start with double or single dash (e.g. '--soname' or '-soname')
1297  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1298  *   or '-Wl,-soname=x.so')
1299  *
1300  * you provide `val` always in 'option[=]' form (no leading -)
1301  */
1302 static int link_option(const char *str, const char *val, const char **ptr)
1303 {
1304     const char *p, *q;
1305     int ret;
1306
1307     /* there should be 1 or 2 dashes */
1308     if (*str++ != '-')
1309         return 0;
1310     if (*str == '-')
1311         str++;
1312
1313     /* then str & val should match (potentially up to '=') */
1314     p = str;
1315     q = val;
1316
1317     ret = 1;
1318     if (q[0] == '?') {
1319         ++q;
1320         if (no_flag(&p))
1321             ret = -1;
1322     }
1323
1324     while (*q != '\0' && *q != '=') {
1325         if (*p != *q)
1326             return 0;
1327         p++;
1328         q++;
1329     }
1330
1331     /* '=' near eos means ',' or '=' is ok */
1332     if (*q == '=') {
1333         if (*p == 0)
1334             *ptr = p;
1335         if (*p != ',' && *p != '=')
1336             return 0;
1337         p++;
1338     } else if (*p) {
1339         return 0;
1340     }
1341     *ptr = p;
1342     return ret;
1343 }
1344
1345 static const char *skip_linker_arg(const char **str)
1346 {
1347     const char *s1 = *str;
1348     const char *s2 = strchr(s1, ',');
1349     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1350     return s2;
1351 }
1352
1353 static void copy_linker_arg(char **pp, const char *s, int sep)
1354 {
1355     const char *q = s;
1356     char *p = *pp;
1357     int l = 0;
1358     if (p && sep)
1359         p[l = strlen(p)] = sep, ++l;
1360     skip_linker_arg(&q);
1361     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1362 }
1363
1364 /* set linker options */
1365 static int tcc_set_linker(TCCState *s, const char *option)
1366 {
1367     TCCState *s1 = s;
1368     while (*option) {
1369
1370         const char *p = NULL;
1371         char *end = NULL;
1372         int ignoring = 0;
1373         int ret;
1374
1375         if (link_option(option, "Bsymbolic", &p)) {
1376             s->symbolic = 1;
1377         } else if (link_option(option, "nostdlib", &p)) {
1378             s->nostdlib = 1;
1379         } else if (link_option(option, "fini=", &p)) {
1380             copy_linker_arg(&s->fini_symbol, p, 0);
1381             ignoring = 1;
1382         } else if (link_option(option, "image-base=", &p)
1383                 || link_option(option, "Ttext=", &p)) {
1384             s->text_addr = strtoull(p, &end, 16);
1385             s->has_text_addr = 1;
1386         } else if (link_option(option, "init=", &p)) {
1387             copy_linker_arg(&s->init_symbol, p, 0);
1388             ignoring = 1;
1389         } else if (link_option(option, "oformat=", &p)) {
1390 #if defined(TCC_TARGET_PE)
1391             if (strstart("pe-", &p)) {
1392 #elif PTR_SIZE == 8
1393             if (strstart("elf64-", &p)) {
1394 #else
1395             if (strstart("elf32-", &p)) {
1396 #endif
1397                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1398             } else if (!strcmp(p, "binary")) {
1399                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1400 #ifdef TCC_TARGET_COFF
1401             } else if (!strcmp(p, "coff")) {
1402                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1403 #endif
1404             } else
1405                 goto err;
1406
1407         } else if (link_option(option, "as-needed", &p)) {
1408             ignoring = 1;
1409         } else if (link_option(option, "O", &p)) {
1410             ignoring = 1;
1411         } else if (link_option(option, "export-all-symbols", &p)) {
1412             s->rdynamic = 1;
1413         } else if (link_option(option, "export-dynamic", &p)) {
1414             s->rdynamic = 1;
1415         } else if (link_option(option, "rpath=", &p)) {
1416             copy_linker_arg(&s->rpath, p, ':');
1417         } else if (link_option(option, "enable-new-dtags", &p)) {
1418             s->enable_new_dtags = 1;
1419         } else if (link_option(option, "section-alignment=", &p)) {
1420             s->section_align = strtoul(p, &end, 16);
1421         } else if (link_option(option, "soname=", &p)) {
1422             copy_linker_arg(&s->soname, p, 0);
1423 #ifdef TCC_TARGET_PE
1424         } else if (link_option(option, "large-address-aware", &p)) {
1425             s->pe_characteristics |= 0x20;
1426         } else if (link_option(option, "file-alignment=", &p)) {
1427             s->pe_file_align = strtoul(p, &end, 16);
1428         } else if (link_option(option, "stack=", &p)) {
1429             s->pe_stack_size = strtoul(p, &end, 10);
1430         } else if (link_option(option, "subsystem=", &p)) {
1431 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1432             if (!strcmp(p, "native")) {
1433                 s->pe_subsystem = 1;
1434             } else if (!strcmp(p, "console")) {
1435                 s->pe_subsystem = 3;
1436             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1437                 s->pe_subsystem = 2;
1438             } else if (!strcmp(p, "posix")) {
1439                 s->pe_subsystem = 7;
1440             } else if (!strcmp(p, "efiapp")) {
1441                 s->pe_subsystem = 10;
1442             } else if (!strcmp(p, "efiboot")) {
1443                 s->pe_subsystem = 11;
1444             } else if (!strcmp(p, "efiruntime")) {
1445                 s->pe_subsystem = 12;
1446             } else if (!strcmp(p, "efirom")) {
1447                 s->pe_subsystem = 13;
1448 #elif defined(TCC_TARGET_ARM)
1449             if (!strcmp(p, "wince")) {
1450                 s->pe_subsystem = 9;
1451 #endif
1452             } else
1453                 goto err;
1454 #endif
1455         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1456             if (ret > 0)
1457                 s->filetype |= AFF_WHOLE_ARCHIVE;
1458             else
1459                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1460         } else if (p) {
1461             return 0;
1462         } else {
1463     err:
1464             tcc_error("unsupported linker option '%s'", option);
1465         }
1466
1467         if (ignoring && s->warn_unsupported)
1468             tcc_warning("unsupported linker option '%s'", option);
1469
1470         option = skip_linker_arg(&p);
1471     }
1472     return 1;
1473 }
1474
1475 typedef struct TCCOption {
1476     const char *name;
1477     uint16_t index;
1478     uint16_t flags;
1479 } TCCOption;
1480
1481 enum {
1482     TCC_OPTION_HELP,
1483     TCC_OPTION_HELP2,
1484     TCC_OPTION_v,
1485     TCC_OPTION_I,
1486     TCC_OPTION_D,
1487     TCC_OPTION_U,
1488     TCC_OPTION_P,
1489     TCC_OPTION_L,
1490     TCC_OPTION_B,
1491     TCC_OPTION_l,
1492     TCC_OPTION_bench,
1493     TCC_OPTION_bt,
1494     TCC_OPTION_b,
1495     TCC_OPTION_ba,
1496     TCC_OPTION_g,
1497     TCC_OPTION_c,
1498     TCC_OPTION_dumpversion,
1499     TCC_OPTION_d,
1500     TCC_OPTION_static,
1501     TCC_OPTION_std,
1502     TCC_OPTION_shared,
1503     TCC_OPTION_soname,
1504     TCC_OPTION_o,
1505     TCC_OPTION_r,
1506     TCC_OPTION_s,
1507     TCC_OPTION_traditional,
1508     TCC_OPTION_Wl,
1509     TCC_OPTION_Wp,
1510     TCC_OPTION_W,
1511     TCC_OPTION_O,
1512     TCC_OPTION_mfloat_abi,
1513     TCC_OPTION_m,
1514     TCC_OPTION_f,
1515     TCC_OPTION_isystem,
1516     TCC_OPTION_iwithprefix,
1517     TCC_OPTION_include,
1518     TCC_OPTION_nostdinc,
1519     TCC_OPTION_nostdlib,
1520     TCC_OPTION_print_search_dirs,
1521     TCC_OPTION_rdynamic,
1522     TCC_OPTION_param,
1523     TCC_OPTION_pedantic,
1524     TCC_OPTION_pthread,
1525     TCC_OPTION_run,
1526     TCC_OPTION_w,
1527     TCC_OPTION_pipe,
1528     TCC_OPTION_E,
1529     TCC_OPTION_MD,
1530     TCC_OPTION_MF,
1531     TCC_OPTION_x,
1532     TCC_OPTION_ar,
1533     TCC_OPTION_impdef
1534 };
1535
1536 #define TCC_OPTION_HAS_ARG 0x0001
1537 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1538
1539 static const TCCOption tcc_options[] = {
1540     { "h", TCC_OPTION_HELP, 0 },
1541     { "-help", TCC_OPTION_HELP, 0 },
1542     { "?", TCC_OPTION_HELP, 0 },
1543     { "hh", TCC_OPTION_HELP2, 0 },
1544     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1545     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1546     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1547     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1548     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1549     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1550     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1551     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1552     { "bench", TCC_OPTION_bench, 0 },
1553 #ifdef CONFIG_TCC_BACKTRACE
1554     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1555 #endif
1556 #ifdef CONFIG_TCC_BCHECK
1557     { "b", TCC_OPTION_b, 0 },
1558 #endif
1559     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1560     { "c", TCC_OPTION_c, 0 },
1561     { "dumpversion", TCC_OPTION_dumpversion, 0},
1562     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1563     { "static", TCC_OPTION_static, 0 },
1564     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1565     { "shared", TCC_OPTION_shared, 0 },
1566     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1567     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1568     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1569     { "pedantic", TCC_OPTION_pedantic, 0},
1570     { "pthread", TCC_OPTION_pthread, 0},
1571     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1572     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1573     { "r", TCC_OPTION_r, 0 },
1574     { "s", TCC_OPTION_s, 0 },
1575     { "traditional", TCC_OPTION_traditional, 0 },
1576     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1577     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1578     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1579     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1580 #ifdef TCC_TARGET_ARM
1581     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1582 #endif
1583     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1584     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1585     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1586     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1587     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1588     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1589     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1590     { "w", TCC_OPTION_w, 0 },
1591     { "pipe", TCC_OPTION_pipe, 0},
1592     { "E", TCC_OPTION_E, 0},
1593     { "MD", TCC_OPTION_MD, 0},
1594     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1595     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1596     { "ar", TCC_OPTION_ar, 0},
1597 #ifdef TCC_TARGET_PE
1598     { "impdef", TCC_OPTION_impdef, 0},
1599 #endif
1600     { NULL, 0, 0 },
1601 };
1602
1603 static const FlagDef options_W[] = {
1604     { 0, 0, "all" },
1605     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1606     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1607     { offsetof(TCCState, warn_error), 0, "error" },
1608     { offsetof(TCCState, warn_gcc_compat), 0, "gcc-compat" },
1609     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1610       "implicit-function-declaration" },
1611     { 0, 0, NULL }
1612 };
1613
1614 static const FlagDef options_f[] = {
1615     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1616     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1617     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1618     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1619     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1620     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1621     { 0, 0, NULL }
1622 };
1623
1624 static const FlagDef options_m[] = {
1625     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1626 #ifdef TCC_TARGET_X86_64
1627     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1628 #endif
1629     { 0, 0, NULL }
1630 };
1631
1632 static void parse_option_D(TCCState *s1, const char *optarg)
1633 {
1634     char *sym = tcc_strdup(optarg);
1635     char *value = strchr(sym, '=');
1636     if (value)
1637         *value++ = '\0';
1638     tcc_define_symbol(s1, sym, value);
1639     tcc_free(sym);
1640 }
1641
1642 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1643 {
1644     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1645     f->type = filetype;
1646     strcpy(f->name, filename);
1647     dynarray_add(&s->files, &s->nb_files, f);
1648 }
1649
1650 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1651 {
1652     int ret = 0, q, c;
1653     CString str;
1654     for(;;) {
1655         while (c = (unsigned char)*r, c && c <= ' ')
1656           ++r;
1657         if (c == 0)
1658             break;
1659         q = 0;
1660         cstr_new(&str);
1661         while (c = (unsigned char)*r, c) {
1662             ++r;
1663             if (c == '\\' && (*r == '"' || *r == '\\')) {
1664                 c = *r++;
1665             } else if (c == '"') {
1666                 q = !q;
1667                 continue;
1668             } else if (q == 0 && c <= ' ') {
1669                 break;
1670             }
1671             cstr_ccat(&str, c);
1672         }
1673         cstr_ccat(&str, 0);
1674         //printf("<%s>\n", str.data), fflush(stdout);
1675         dynarray_add(argv, argc, tcc_strdup(str.data));
1676         cstr_free(&str);
1677         ++ret;
1678     }
1679     return ret;
1680 }
1681
1682 /* read list file */
1683 static void args_parser_listfile(TCCState *s,
1684     const char *filename, int optind, int *pargc, char ***pargv)
1685 {
1686     TCCState *s1 = s;
1687     int fd, i;
1688     size_t len;
1689     char *p;
1690     int argc = 0;
1691     char **argv = NULL;
1692
1693     fd = open(filename, O_RDONLY | O_BINARY);
1694     if (fd < 0)
1695         tcc_error("listfile '%s' not found", filename);
1696
1697     len = lseek(fd, 0, SEEK_END);
1698     p = tcc_malloc(len + 1), p[len] = 0;
1699     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1700
1701     for (i = 0; i < *pargc; ++i)
1702         if (i == optind)
1703             args_parser_make_argv(p, &argc, &argv);
1704         else
1705             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1706
1707     tcc_free(p);
1708     dynarray_reset(&s->argv, &s->argc);
1709     *pargc = s->argc = argc, *pargv = s->argv = argv;
1710 }
1711
1712 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1713 {
1714     TCCState *s1 = s;
1715     const TCCOption *popt;
1716     const char *optarg, *r;
1717     const char *run = NULL;
1718     int last_o = -1;
1719     int x;
1720     CString linker_arg; /* collect -Wl options */
1721     int tool = 0, arg_start = 0, noaction = optind;
1722     char **argv = *pargv;
1723     int argc = *pargc;
1724
1725     cstr_new(&linker_arg);
1726
1727     while (optind < argc) {
1728         r = argv[optind];
1729         if (r[0] == '@' && r[1] != '\0') {
1730             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1731             continue;
1732         }
1733         optind++;
1734         if (tool) {
1735             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1736                 ++s->verbose;
1737             continue;
1738         }
1739 reparse:
1740         if (r[0] != '-' || r[1] == '\0') {
1741             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1742                 args_parser_add_file(s, r, s->filetype);
1743             if (run) {
1744                 tcc_set_options(s, run);
1745                 arg_start = optind - 1;
1746                 break;
1747             }
1748             continue;
1749         }
1750
1751         /* find option in table */
1752         for(popt = tcc_options; ; ++popt) {
1753             const char *p1 = popt->name;
1754             const char *r1 = r + 1;
1755             if (p1 == NULL)
1756                 tcc_error("invalid option -- '%s'", r);
1757             if (!strstart(p1, &r1))
1758                 continue;
1759             optarg = r1;
1760             if (popt->flags & TCC_OPTION_HAS_ARG) {
1761                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1762                     if (optind >= argc)
1763                 arg_err:
1764                         tcc_error("argument to '%s' is missing", r);
1765                     optarg = argv[optind++];
1766                 }
1767             } else if (*r1 != '\0')
1768                 continue;
1769             break;
1770         }
1771
1772         switch(popt->index) {
1773         case TCC_OPTION_HELP:
1774             return OPT_HELP;
1775         case TCC_OPTION_HELP2:
1776             return OPT_HELP2;
1777         case TCC_OPTION_I:
1778             tcc_add_include_path(s, optarg);
1779             break;
1780         case TCC_OPTION_D:
1781             parse_option_D(s, optarg);
1782             break;
1783         case TCC_OPTION_U:
1784             tcc_undefine_symbol(s, optarg);
1785             break;
1786         case TCC_OPTION_L:
1787             tcc_add_library_path(s, optarg);
1788             break;
1789         case TCC_OPTION_B:
1790             /* set tcc utilities path (mainly for tcc development) */
1791             tcc_set_lib_path(s, optarg);
1792             break;
1793         case TCC_OPTION_l:
1794             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1795             s->nb_libraries++;
1796             break;
1797         case TCC_OPTION_pthread:
1798             parse_option_D(s, "_REENTRANT");
1799             s->option_pthread = 1;
1800             break;
1801         case TCC_OPTION_bench:
1802             s->do_bench = 1;
1803             break;
1804 #ifdef CONFIG_TCC_BACKTRACE
1805         case TCC_OPTION_bt:
1806             s->rt_num_callers = atoi(optarg);
1807             break;
1808 #endif
1809 #ifdef CONFIG_TCC_BCHECK
1810         case TCC_OPTION_b:
1811             s->do_bounds_check = 1;
1812             s->do_debug = 1;
1813             break;
1814 #endif
1815         case TCC_OPTION_g:
1816             s->do_debug = 1;
1817             break;
1818         case TCC_OPTION_c:
1819             x = TCC_OUTPUT_OBJ;
1820         set_output_type:
1821             if (s->output_type)
1822                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1823             s->output_type = x;
1824             break;
1825         case TCC_OPTION_d:
1826             if (*optarg == 'D')
1827                 s->dflag = 3;
1828             else if (*optarg == 'M')
1829                 s->dflag = 7;
1830             else if (*optarg == 't')
1831                 s->dflag = 16;
1832             else if (isnum(*optarg))
1833                 s->g_debug |= atoi(optarg);
1834             else
1835                 goto unsupported_option;
1836             break;
1837         case TCC_OPTION_static:
1838             s->static_link = 1;
1839             break;
1840         case TCC_OPTION_std:
1841             if (*optarg == '=') {
1842                 if (strcmp(optarg, "=c11") == 0) {
1843                     tcc_undefine_symbol(s, "__STDC_VERSION__");
1844                     tcc_define_symbol(s, "__STDC_VERSION__", "201112L");
1845                     /*
1846                      * The integer constant 1, intended to indicate
1847                      * that the implementation does not support atomic
1848                      * types (including the _Atomic type qualiﬁer) and
1849                      * the <stdatomic.h> header.
1850                      */
1851                     tcc_define_symbol(s, "__STDC_NO_ATOMICS__", "1");
1852                     /*
1853                      * The integer constant 1, intended to indicate
1854                      * that the implementation does not support complex
1855                      * types or the <complex.h> header.
1856                      */
1857                     tcc_define_symbol(s, "__STDC_NO_COMPLEX__", "1");
1858                     /*
1859                      * The integer constant 1, intended to indicate
1860                      * that the implementation does not support the
1861                      * <threads.h> header.
1862                      */
1863                     tcc_define_symbol(s, "__STDC_NO_THREADS__", "1");
1864                     /*
1865                      * __STDC_NO_VLA__, tcc supports VLA.
1866                      * The integer constant 1, intended to indicate
1867                      * that the implementation does not support
1868                      * variable length arrays or variably modiﬁed
1869                      * types.
1870                      */
1871 #if !defined(TCC_TARGET_PE)
1872                     /*
1873                      * An integer constant of the form yyyymmL (for
1874                      * example, 199712L). If this symbol is deﬁned,
1875                      * then every character in the Unicode required
1876                      * set, when stored in an object of type
1877                      * wchar_t, has the same value as the short
1878                      * identiﬁer of that character.
1879                      */
1880                     #if 0
1881                     /* on Linux, this conflicts with a define introduced by
1882                      * /usr/include/stdc-predef.h included by glibc libs;
1883                      * clang doesn't define it at all so it's probably not necessary
1884                      */
1885                     tcc_define_symbol(s, "__STDC_ISO_10646__", "201605L");
1886                     #endif
1887                     /*
1888                      * The integer constant 1, intended to indicate
1889                      * that values of type char16_t are UTF−16
1890                      * encoded. If some other encoding is used, the
1891                      * macro shall not be deﬁned and the actual
1892                      * encoding used is implementation deﬁned.
1893                      */
1894                     tcc_define_symbol(s, "__STDC_UTF_16__", "1");
1895                     /*
1896                      * The integer constant 1, intended to indicate
1897                      * that values of type char32_t are UTF−32
1898                      * encoded. If some other encoding is used, the
1899                      * macro shall not be deﬁned and the actual
1900                      * encoding used is implementationdeﬁned.
1901                      */
1902                     tcc_define_symbol(s, "__STDC_UTF_32__", "1");
1903 #endif /* !TCC_TARGET_PE */
1904                     s->cversion = 201112;
1905                 }
1906             }
1907             /*
1908              * silently ignore other values, a current purpose:
1909              * allow to use a tcc as a reference compiler for "make test"
1910              */
1911             break;
1912         case TCC_OPTION_shared:
1913             x = TCC_OUTPUT_DLL;
1914             goto set_output_type;
1915         case TCC_OPTION_soname:
1916             s->soname = tcc_strdup(optarg);
1917             break;
1918         case TCC_OPTION_o:
1919             if (s->outfile) {
1920                 tcc_warning("multiple -o option");
1921                 tcc_free(s->outfile);
1922             }
1923             s->outfile = tcc_strdup(optarg);
1924             break;
1925         case TCC_OPTION_r:
1926             /* generate a .o merging several output files */
1927             s->option_r = 1;
1928             x = TCC_OUTPUT_OBJ;
1929             goto set_output_type;
1930         case TCC_OPTION_isystem:
1931             tcc_add_sysinclude_path(s, optarg);
1932             break;
1933         case TCC_OPTION_include:
1934             cstr_printf(&s->cmdline_incl, "#include \"%s\"\n", optarg);
1935             break;
1936         case TCC_OPTION_nostdinc:
1937             s->nostdinc = 1;
1938             break;
1939         case TCC_OPTION_nostdlib:
1940             s->nostdlib = 1;
1941             break;
1942         case TCC_OPTION_run:
1943 #ifndef TCC_IS_NATIVE
1944             tcc_error("-run is not available in a cross compiler");
1945 #endif
1946             run = optarg;
1947             x = TCC_OUTPUT_MEMORY;
1948             goto set_output_type;
1949         case TCC_OPTION_v:
1950             do ++s->verbose; while (*optarg++ == 'v');
1951             ++noaction;
1952             break;
1953         case TCC_OPTION_f:
1954             if (set_flag(s, options_f, optarg) < 0)
1955                 goto unsupported_option;
1956             break;
1957 #ifdef TCC_TARGET_ARM
1958         case TCC_OPTION_mfloat_abi:
1959             /* tcc doesn't support soft float yet */
1960             if (!strcmp(optarg, "softfp")) {
1961                 s->float_abi = ARM_SOFTFP_FLOAT;
1962                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1963             } else if (!strcmp(optarg, "hard"))
1964                 s->float_abi = ARM_HARD_FLOAT;
1965             else
1966                 tcc_error("unsupported float abi '%s'", optarg);
1967             break;
1968 #endif
1969         case TCC_OPTION_m:
1970             if (set_flag(s, options_m, optarg) < 0) {
1971                 if (x = atoi(optarg), x != 32 && x != 64)
1972                     goto unsupported_option;
1973                 if (PTR_SIZE != x/8)
1974                     return x;
1975                 ++noaction;
1976             }
1977             break;
1978         case TCC_OPTION_W:
1979             s->warn_none = 0;
1980             if (optarg[0] && set_flag(s, options_W, optarg) < 0)
1981                 goto unsupported_option;
1982             break;
1983         case TCC_OPTION_w:
1984             s->warn_none = 1;
1985             break;
1986         case TCC_OPTION_rdynamic:
1987             s->rdynamic = 1;
1988             break;
1989         case TCC_OPTION_Wl:
1990             if (linker_arg.size)
1991                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1992             cstr_cat(&linker_arg, optarg, 0);
1993             if (tcc_set_linker(s, linker_arg.data))
1994                 cstr_free(&linker_arg);
1995             break;
1996         case TCC_OPTION_Wp:
1997             r = optarg;
1998             goto reparse;
1999         case TCC_OPTION_E:
2000             x = TCC_OUTPUT_PREPROCESS;
2001             goto set_output_type;
2002         case TCC_OPTION_P:
2003             s->Pflag = atoi(optarg) + 1;
2004             break;
2005         case TCC_OPTION_MD:
2006             s->gen_deps = 1;
2007             break;
2008         case TCC_OPTION_MF:
2009             s->deps_outfile = tcc_strdup(optarg);
2010             break;
2011         case TCC_OPTION_dumpversion:
2012             printf ("%s\n", TCC_VERSION);
2013             exit(0);
2014             break;
2015         case TCC_OPTION_x:
2016             x = 0;
2017             if (*optarg == 'c')
2018                 x = AFF_TYPE_C;
2019             else if (*optarg == 'a')
2020                 x = AFF_TYPE_ASMPP;
2021             else if (*optarg == 'b')
2022                 x = AFF_TYPE_BIN;
2023             else if (*optarg == 'n')
2024                 x = AFF_TYPE_NONE;
2025             else
2026                 tcc_warning("unsupported language '%s'", optarg);
2027             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
2028             break;
2029         case TCC_OPTION_O:
2030             last_o = atoi(optarg);
2031             break;
2032         case TCC_OPTION_print_search_dirs:
2033             x = OPT_PRINT_DIRS;
2034             goto extra_action;
2035         case TCC_OPTION_impdef:
2036             x = OPT_IMPDEF;
2037             goto extra_action;
2038         case TCC_OPTION_ar:
2039             x = OPT_AR;
2040         extra_action:
2041             arg_start = optind - 1;
2042             if (arg_start != noaction)
2043                 tcc_error("cannot parse %s here", r);
2044             tool = x;
2045             break;
2046         case TCC_OPTION_traditional:
2047         case TCC_OPTION_pedantic:
2048         case TCC_OPTION_pipe:
2049         case TCC_OPTION_s:
2050             /* ignored */
2051             break;
2052         default:
2053 unsupported_option:
2054             if (s->warn_unsupported)
2055                 tcc_warning("unsupported option '%s'", r);
2056             break;
2057         }
2058     }
2059     if (last_o > 0)
2060         tcc_define_symbol(s, "__OPTIMIZE__", NULL);
2061     if (linker_arg.size) {
2062         r = linker_arg.data;
2063         goto arg_err;
2064     }
2065     *pargc = argc - arg_start;
2066     *pargv = argv + arg_start;
2067     if (tool)
2068         return tool;
2069     if (optind != noaction)
2070         return 0;
2071     if (s->verbose == 2)
2072         return OPT_PRINT_DIRS;
2073     if (s->verbose)
2074         return OPT_V;
2075     return OPT_HELP;
2076 }
2077
2078 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
2079 {
2080     char **argv = NULL;
2081     int argc = 0;
2082     args_parser_make_argv(r, &argc, &argv);
2083     tcc_parse_args(s, &argc, &argv, 0);
2084     dynarray_reset(&argv, &argc);
2085 }
2086
2087 PUB_FUNC void tcc_print_stats(TCCState *s1, unsigned total_time)
2088 {
2089     if (total_time < 1)
2090         total_time = 1;
2091     if (total_bytes < 1)
2092         total_bytes = 1;
2093     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
2094                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
2095            total_idents, total_lines, total_bytes,
2096            (double)total_time/1000,
2097            (unsigned)total_lines*1000/total_time,
2098            (double)total_bytes/1000/total_time);
2099 #ifdef MEM_DEBUG
2100     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
2101 #endif
2102 }