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     s->ppfp = stdout;
 781     /* might be used in error() before preprocess_start() */
 782     s->include_stack_ptr = s->include_stack;
 783
 784     tccelf_new(s);
 785
 786 #ifdef _WIN32
 787     tcc_set_lib_path_w32(s);
 788 #else
 789     tcc_set_lib_path(s, CONFIG_TCCDIR);
 790 #endif
 791
 792     {
 793         /* define __TINYC__ 92X  */
 794         char buffer[32]; int a,b,c;
 795         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 796         sprintf(buffer, "%d", a*10000 + b*100 + c);
 797         tcc_define_symbol(s, "__TINYC__", buffer);
 798     }
 799
 800     /* standard defines */
 801     tcc_define_symbol(s, "__STDC__", NULL);
 802     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 803     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 804
 805     /* target defines */
 806 #if defined(TCC_TARGET_I386)
 807     tcc_define_symbol(s, "__i386__", NULL);
 808     tcc_define_symbol(s, "__i386", NULL);
 809     tcc_define_symbol(s, "i386", NULL);
 810 #elif defined(TCC_TARGET_X86_64)
 811     tcc_define_symbol(s, "__x86_64__", NULL);
 812 #elif defined(TCC_TARGET_ARM)
 813     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 814     tcc_define_symbol(s, "__arm_elf__", NULL);
 815     tcc_define_symbol(s, "__arm_elf", NULL);
 816     tcc_define_symbol(s, "arm_elf", NULL);
 817     tcc_define_symbol(s, "__arm__", NULL);
 818     tcc_define_symbol(s, "__arm", NULL);
 819     tcc_define_symbol(s, "arm", NULL);
 820     tcc_define_symbol(s, "__APCS_32__", NULL);
 821     tcc_define_symbol(s, "__ARMEL__", NULL);
 822 #if defined(TCC_ARM_EABI)
 823     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 824 #endif
 825 #if defined(TCC_ARM_HARDFLOAT)
 826     s->float_abi = ARM_HARD_FLOAT;
 827     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 828 #else
 829     s->float_abi = ARM_SOFTFP_FLOAT;
 830 #endif
 831 #elif defined(TCC_TARGET_ARM64)
 832     tcc_define_symbol(s, "__aarch64__", NULL);
 833 #elif defined TCC_TARGET_C67
 834     tcc_define_symbol(s, "__C67__", NULL);
 835 #elif defined TCC_TARGET_RISCV64
 836     tcc_define_symbol(s, "__riscv", NULL);
 837     tcc_define_symbol(s, "__riscv_xlen", "64");
 838     tcc_define_symbol(s, "__riscv_flen", "64");
 839     tcc_define_symbol(s, "__riscv_div", NULL);
 840     tcc_define_symbol(s, "__riscv_mul", NULL);
 841     tcc_define_symbol(s, "__riscv_fdiv", NULL);
 842     tcc_define_symbol(s, "__riscv_fsqrt", NULL);
 843     tcc_define_symbol(s, "__riscv_float_abi_double", NULL);
 844 #endif
 845
 846 #ifdef TCC_TARGET_PE
 847     tcc_define_symbol(s, "_WIN32", NULL);
 848     tcc_define_symbol(s, "__declspec(x)", "__attribute__((x))");
 849     tcc_define_symbol(s, "__cdecl", "");
 850 # ifdef TCC_TARGET_X86_64
 851     tcc_define_symbol(s, "_WIN64", NULL);
 852 # endif
 853 #else
 854     tcc_define_symbol(s, "__unix__", NULL);
 855     tcc_define_symbol(s, "__unix", NULL);
 856     tcc_define_symbol(s, "unix", NULL);
 857 # if defined(__linux__)
 858     tcc_define_symbol(s, "__linux__", NULL);
 859     tcc_define_symbol(s, "__linux", NULL);
 860 # endif
 861 # if defined(__FreeBSD__)
 862     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 863     /* No 'Thread Storage Local' on FreeBSD with tcc */
 864     tcc_define_symbol(s, "__NO_TLS", NULL);
 865 # endif
 866 # if defined(__FreeBSD_kernel__)
 867     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 868 # endif
 869 # if defined(__NetBSD__)
 870     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 871 # endif
 872 # if defined(__OpenBSD__)
 873     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 874 # endif
 875 #endif
 876
 877     /* TinyCC & gcc defines */
 878 #if PTR_SIZE == 4
 879     /* 32bit systems. */
 880     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
 881     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
 882     tcc_define_symbol(s, "__ILP32__", NULL);
 883 #elif LONG_SIZE == 4
 884     /* 64bit Windows. */
 885     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 886     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 887     tcc_define_symbol(s, "__LLP64__", NULL);
 888 #else
 889     /* Other 64bit systems. */
 890     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 891     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 892     tcc_define_symbol(s, "__LP64__", NULL);
 893 #endif
 894     tcc_define_symbol(s, "__SIZEOF_POINTER__", PTR_SIZE == 4 ? "4" : "8");
 895
 896 #ifdef TCC_TARGET_PE
 897     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 898     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 899 #else
 900     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 901     /* wint_t is unsigned int by default, but (signed) int on BSDs
 902        and unsigned short on windows.  Other OSes might have still
 903        other conventions, sigh.  */
 904 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 905   || defined(__NetBSD__) || defined(__OpenBSD__)
 906     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 907 #  ifdef __FreeBSD__
 908     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 909        that are unconditionally used in FreeBSDs other system headers :/ */
 910     tcc_define_symbol(s, "__GNUC__", "2");
 911     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 912     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 913 #  endif
 914 # else
 915     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 916     /* glibc defines */
 917     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 918         "name proto __asm__ (#alias)");
 919     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 920         "name proto __asm__ (#alias) __THROW");
 921 # endif
 922     /* Some GCC builtins that are simple to express as macros.  */
 923     tcc_define_symbol(s, "__builtin_extract_return_addr(x)", "x");
 924 #endif /* ndef TCC_TARGET_PE */
 925 #ifdef TCC_TARGET_MACHO
 926     /* emulate APPLE-GCC to make libc's headerfiles compile: */
 927     tcc_define_symbol(s, "__APPLE__", "1");
 928     tcc_define_symbol(s, "__GNUC__", "4");   /* darwin emits warning on GCC<4 */
 929
 930     /* avoids usage of GCC/clang specific builtins in libc-headerfiles: */
 931     tcc_define_symbol(s, "__FINITE_MATH_ONLY__", "1");
 932     tcc_define_symbol(s, "_FORTIFY_SOURCE", "0");
 933 #endif /* ndef TCC_TARGET_MACHO */
 934     return s;
 935 }
 936
 937 LIBTCCAPI void tcc_delete(TCCState *s1)
 938 {
 939     /* free sections */
 940     tccelf_delete(s1);
 941
 942     /* free library paths */
 943     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 944     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 945
 946     /* free include paths */
 947     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 948     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 949
 950     tcc_free(s1->tcc_lib_path);
 951     tcc_free(s1->soname);
 952     tcc_free(s1->rpath);
 953     tcc_free(s1->init_symbol);
 954     tcc_free(s1->fini_symbol);
 955     tcc_free(s1->outfile);
 956     tcc_free(s1->deps_outfile);
 957     dynarray_reset(&s1->files, &s1->nb_files);
 958     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 959     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 960     dynarray_reset(&s1->argv, &s1->argc);
 961
 962     cstr_free(&s1->cmdline_defs);
 963     cstr_free(&s1->cmdline_incl);
 964 #ifdef TCC_IS_NATIVE
 965     /* free runtime memory */
 966     tcc_run_free(s1);
 967 #endif
 968
 969     tcc_free(s1);
 970 #ifdef MEM_DEBUG
 971     if (0 == --nb_states)
 972         tcc_memcheck();
 973 #endif
 974 }
 975
 976 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 977 {
 978     s->output_type = output_type;
 979
 980     /* always elf for objects */
 981     if (output_type == TCC_OUTPUT_OBJ)
 982         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 983
 984     if (s->char_is_unsigned)
 985         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 986
 987     if (!s->nostdinc) {
 988         /* default include paths */
 989         /* -isystem paths have already been handled */
 990         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 991     }
 992
 993 #ifdef CONFIG_TCC_BCHECK
 994     if (s->do_bounds_check) {
 995         /* if bound checking, then add corresponding sections */
 996         tccelf_bounds_new(s);
 997         /* define symbol */
 998         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 999     }
1000 #endif
1001     if (s->do_debug) {
1002         /* add debug sections */
1003         tccelf_stab_new(s);
1004     }
1005
1006     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1007
1008 #ifdef TCC_TARGET_PE
1009 # ifdef _WIN32
1010     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
1011         tcc_add_systemdir(s);
1012 # endif
1013 #else
1014     /* paths for crt objects */
1015     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1016     /* add libc crt1/crti objects */
1017     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1018         !s->nostdlib) {
1019         if (output_type != TCC_OUTPUT_DLL)
1020             tcc_add_crt(s, "crt1.o");
1021         tcc_add_crt(s, "crti.o");
1022     }
1023 #endif
1024     return 0;
1025 }
1026
1027 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1028 {
1029     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
1030     return 0;
1031 }
1032
1033 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1034 {
1035     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1036     return 0;
1037 }
1038
1039 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1040 {
1041     int fd, ret;
1042
1043     /* open the file */
1044     fd = _tcc_open(s1, filename);
1045     if (fd < 0) {
1046         if (flags & AFF_PRINT_ERROR)
1047             tcc_error_noabort("file '%s' not found", filename);
1048         return -1;
1049     }
1050
1051     /* update target deps */
1052     dynarray_add(&s1->target_deps, &s1->nb_target_deps,
1053             tcc_strdup(filename));
1054
1055     if (flags & AFF_TYPE_BIN) {
1056         ElfW(Ehdr) ehdr;
1057         int obj_type;
1058
1059         obj_type = tcc_object_type(fd, &ehdr);
1060         lseek(fd, 0, SEEK_SET);
1061
1062 #ifdef TCC_TARGET_MACHO
1063         if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), ".dylib"))
1064             obj_type = AFF_BINTYPE_DYN;
1065 #endif
1066
1067         switch (obj_type) {
1068         case AFF_BINTYPE_REL:
1069             ret = tcc_load_object_file(s1, fd, 0);
1070             break;
1071 #ifndef TCC_TARGET_PE
1072         case AFF_BINTYPE_DYN:
1073             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1074                 ret = 0;
1075 #ifdef TCC_IS_NATIVE
1076                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1077                     ret = -1;
1078 #endif
1079             } else {
1080                 ret = tcc_load_dll(s1, fd, filename,
1081                                    (flags & AFF_REFERENCED_DLL) != 0);
1082             }
1083             break;
1084 #endif
1085         case AFF_BINTYPE_AR:
1086             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1087             break;
1088 #ifdef TCC_TARGET_COFF
1089         case AFF_BINTYPE_C67:
1090             ret = tcc_load_coff(s1, fd);
1091             break;
1092 #endif
1093         default:
1094 #ifdef TCC_TARGET_PE
1095             ret = pe_load_file(s1, filename, fd);
1096 #else
1097             /* as GNU ld, consider it is an ld script if not recognized */
1098             ret = tcc_load_ldscript(s1, fd);
1099 #endif
1100             if (ret < 0)
1101                 tcc_error_noabort("unrecognized file type");
1102             break;
1103         }
1104         close(fd);
1105     } else {
1106         ret = tcc_compile(s1, flags, filename, fd);
1107     }
1108     return ret;
1109 }
1110
1111 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1112 {
1113     int filetype = s->filetype;
1114     if (0 == (filetype & AFF_TYPE_MASK)) {
1115         /* use a file extension to detect a filetype */
1116         const char *ext = tcc_fileextension(filename);
1117         if (ext[0]) {
1118             ext++;
1119             if (!strcmp(ext, "S"))
1120                 filetype = AFF_TYPE_ASMPP;
1121             else if (!strcmp(ext, "s"))
1122                 filetype = AFF_TYPE_ASM;
1123             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1124                 filetype = AFF_TYPE_C;
1125             else
1126                 filetype |= AFF_TYPE_BIN;
1127         } else {
1128             filetype = AFF_TYPE_C;
1129         }
1130     }
1131     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1132 }
1133
1134 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1135 {
1136     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1137     return 0;
1138 }
1139
1140 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1141     const char *filename, int flags, char **paths, int nb_paths)
1142 {
1143     char buf[1024];
1144     int i;
1145
1146     for(i = 0; i < nb_paths; i++) {
1147         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1148         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1149             return 0;
1150     }
1151     return -1;
1152 }
1153
1154 /* find and load a dll. Return non zero if not found */
1155 /* XXX: add '-rpath' option support ? */
1156 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1157 {
1158     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1159         s->library_paths, s->nb_library_paths);
1160 }
1161
1162 #ifndef TCC_TARGET_PE
1163 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)
1164 {
1165     if (-1 == tcc_add_library_internal(s1, "%s/%s",
1166         filename, 0, s1->crt_paths, s1->nb_crt_paths))
1167         tcc_error_noabort("file '%s' not found", filename);
1168     return 0;
1169 }
1170 #endif
1171
1172 /* the library name is the same as the argument of the '-l' option */
1173 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1174 {
1175 #if defined TCC_TARGET_PE
1176     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1177     const char **pp = s->static_link ? libs + 4 : libs;
1178 #elif defined TCC_TARGET_MACHO
1179     const char *libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
1180     const char **pp = s->static_link ? libs + 1 : libs;
1181 #else
1182     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1183     const char **pp = s->static_link ? libs + 1 : libs;
1184 #endif
1185     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1186     while (*pp) {
1187         if (0 == tcc_add_library_internal(s, *pp,
1188             libraryname, flags, s->library_paths, s->nb_library_paths))
1189             return 0;
1190         ++pp;
1191     }
1192     return -1;
1193 }
1194
1195 PUB_FUNC int tcc_add_library_err(TCCState *s1, const char *libname)
1196 {
1197     int ret = tcc_add_library(s1, libname);
1198     if (ret < 0)
1199         tcc_error_noabort("library '%s' not found", libname);
1200     return ret;
1201 }
1202
1203 /* handle #pragma comment(lib,) */
1204 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1205 {
1206     int i;
1207     for (i = 0; i < s1->nb_pragma_libs; i++)
1208         tcc_add_library_err(s1, s1->pragma_libs[i]);
1209 }
1210
1211 LIBTCCAPI int tcc_add_symbol(TCCState *s1, const char *name, const void *val)
1212 {
1213 #ifdef TCC_TARGET_PE
1214     /* On x86_64 'val' might not be reachable with a 32bit offset.
1215        So it is handled here as if it were in a DLL. */
1216     pe_putimport(s1, 0, name, (uintptr_t)val);
1217 #else
1218     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1219         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1220         SHN_ABS, name);
1221 #endif
1222     return 0;
1223 }
1224
1225 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1226 {
1227     tcc_free(s->tcc_lib_path);
1228     s->tcc_lib_path = tcc_strdup(path);
1229 }
1230
1231 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1232 #define FD_INVERT 0x0002 /* invert value before storing */
1233
1234 typedef struct FlagDef {
1235     uint16_t offset;
1236     uint16_t flags;
1237     const char *name;
1238 } FlagDef;
1239
1240 static int no_flag(const char **pp)
1241 {
1242     const char *p = *pp;
1243     if (*p != 'n' || *++p != 'o' || *++p != '-')
1244         return 0;
1245     *pp = p + 1;
1246     return 1;
1247 }
1248
1249 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1250 {
1251     int value, ret;
1252     const FlagDef *p;
1253     const char *r;
1254
1255     value = 1;
1256     r = name;
1257     if (no_flag(&r))
1258         value = 0;
1259
1260     for (ret = -1, p = flags; p->name; ++p) {
1261         if (ret) {
1262             if (strcmp(r, p->name))
1263                 continue;
1264         } else {
1265             if (0 == (p->flags & WD_ALL))
1266                 continue;
1267         }
1268         if (p->offset) {
1269             *((unsigned char *)s + p->offset) =
1270                 p->flags & FD_INVERT ? !value : value;
1271             if (ret)
1272                 return 0;
1273         } else {
1274             ret = 0;
1275         }
1276     }
1277     return ret;
1278 }
1279
1280 static int strstart(const char *val, const char **str)
1281 {
1282     const char *p, *q;
1283     p = *str;
1284     q = val;
1285     while (*q) {
1286         if (*p != *q)
1287             return 0;
1288         p++;
1289         q++;
1290     }
1291     *str = p;
1292     return 1;
1293 }
1294
1295 /* Like strstart, but automatically takes into account that ld options can
1296  *
1297  * - start with double or single dash (e.g. '--soname' or '-soname')
1298  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1299  *   or '-Wl,-soname=x.so')
1300  *
1301  * you provide `val` always in 'option[=]' form (no leading -)
1302  */
1303 static int link_option(const char *str, const char *val, const char **ptr)
1304 {
1305     const char *p, *q;
1306     int ret;
1307
1308     /* there should be 1 or 2 dashes */
1309     if (*str++ != '-')
1310         return 0;
1311     if (*str == '-')
1312         str++;
1313
1314     /* then str & val should match (potentially up to '=') */
1315     p = str;
1316     q = val;
1317
1318     ret = 1;
1319     if (q[0] == '?') {
1320         ++q;
1321         if (no_flag(&p))
1322             ret = -1;
1323     }
1324
1325     while (*q != '\0' && *q != '=') {
1326         if (*p != *q)
1327             return 0;
1328         p++;
1329         q++;
1330     }
1331
1332     /* '=' near eos means ',' or '=' is ok */
1333     if (*q == '=') {
1334         if (*p == 0)
1335             *ptr = p;
1336         if (*p != ',' && *p != '=')
1337             return 0;
1338         p++;
1339     } else if (*p) {
1340         return 0;
1341     }
1342     *ptr = p;
1343     return ret;
1344 }
1345
1346 static const char *skip_linker_arg(const char **str)
1347 {
1348     const char *s1 = *str;
1349     const char *s2 = strchr(s1, ',');
1350     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1351     return s2;
1352 }
1353
1354 static void copy_linker_arg(char **pp, const char *s, int sep)
1355 {
1356     const char *q = s;
1357     char *p = *pp;
1358     int l = 0;
1359     if (p && sep)
1360         p[l = strlen(p)] = sep, ++l;
1361     skip_linker_arg(&q);
1362     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1363 }
1364
1365 /* set linker options */
1366 static int tcc_set_linker(TCCState *s, const char *option)
1367 {
1368     TCCState *s1 = s;
1369     while (*option) {
1370
1371         const char *p = NULL;
1372         char *end = NULL;
1373         int ignoring = 0;
1374         int ret;
1375
1376         if (link_option(option, "Bsymbolic", &p)) {
1377             s->symbolic = 1;
1378         } else if (link_option(option, "nostdlib", &p)) {
1379             s->nostdlib = 1;
1380         } else if (link_option(option, "fini=", &p)) {
1381             copy_linker_arg(&s->fini_symbol, p, 0);
1382             ignoring = 1;
1383         } else if (link_option(option, "image-base=", &p)
1384                 || link_option(option, "Ttext=", &p)) {
1385             s->text_addr = strtoull(p, &end, 16);
1386             s->has_text_addr = 1;
1387         } else if (link_option(option, "init=", &p)) {
1388             copy_linker_arg(&s->init_symbol, p, 0);
1389             ignoring = 1;
1390         } else if (link_option(option, "oformat=", &p)) {
1391 #if defined(TCC_TARGET_PE)
1392             if (strstart("pe-", &p)) {
1393 #elif PTR_SIZE == 8
1394             if (strstart("elf64-", &p)) {
1395 #else
1396             if (strstart("elf32-", &p)) {
1397 #endif
1398                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1399             } else if (!strcmp(p, "binary")) {
1400                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1401 #ifdef TCC_TARGET_COFF
1402             } else if (!strcmp(p, "coff")) {
1403                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1404 #endif
1405             } else
1406                 goto err;
1407
1408         } else if (link_option(option, "as-needed", &p)) {
1409             ignoring = 1;
1410         } else if (link_option(option, "O", &p)) {
1411             ignoring = 1;
1412         } else if (link_option(option, "export-all-symbols", &p)) {
1413             s->rdynamic = 1;
1414         } else if (link_option(option, "export-dynamic", &p)) {
1415             s->rdynamic = 1;
1416         } else if (link_option(option, "rpath=", &p)) {
1417             copy_linker_arg(&s->rpath, p, ':');
1418         } else if (link_option(option, "enable-new-dtags", &p)) {
1419             s->enable_new_dtags = 1;
1420         } else if (link_option(option, "section-alignment=", &p)) {
1421             s->section_align = strtoul(p, &end, 16);
1422         } else if (link_option(option, "soname=", &p)) {
1423             copy_linker_arg(&s->soname, p, 0);
1424 #ifdef TCC_TARGET_PE
1425         } else if (link_option(option, "large-address-aware", &p)) {
1426             s->pe_characteristics |= 0x20;
1427         } else if (link_option(option, "file-alignment=", &p)) {
1428             s->pe_file_align = strtoul(p, &end, 16);
1429         } else if (link_option(option, "stack=", &p)) {
1430             s->pe_stack_size = strtoul(p, &end, 10);
1431         } else if (link_option(option, "subsystem=", &p)) {
1432 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1433             if (!strcmp(p, "native")) {
1434                 s->pe_subsystem = 1;
1435             } else if (!strcmp(p, "console")) {
1436                 s->pe_subsystem = 3;
1437             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1438                 s->pe_subsystem = 2;
1439             } else if (!strcmp(p, "posix")) {
1440                 s->pe_subsystem = 7;
1441             } else if (!strcmp(p, "efiapp")) {
1442                 s->pe_subsystem = 10;
1443             } else if (!strcmp(p, "efiboot")) {
1444                 s->pe_subsystem = 11;
1445             } else if (!strcmp(p, "efiruntime")) {
1446                 s->pe_subsystem = 12;
1447             } else if (!strcmp(p, "efirom")) {
1448                 s->pe_subsystem = 13;
1449 #elif defined(TCC_TARGET_ARM)
1450             if (!strcmp(p, "wince")) {
1451                 s->pe_subsystem = 9;
1452 #endif
1453             } else
1454                 goto err;
1455 #endif
1456         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1457             if (ret > 0)
1458                 s->filetype |= AFF_WHOLE_ARCHIVE;
1459             else
1460                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1461         } else if (p) {
1462             return 0;
1463         } else {
1464     err:
1465             tcc_error("unsupported linker option '%s'", option);
1466         }
1467
1468         if (ignoring && s->warn_unsupported)
1469             tcc_warning("unsupported linker option '%s'", option);
1470
1471         option = skip_linker_arg(&p);
1472     }
1473     return 1;
1474 }
1475
1476 typedef struct TCCOption {
1477     const char *name;
1478     uint16_t index;
1479     uint16_t flags;
1480 } TCCOption;
1481
1482 enum {
1483     TCC_OPTION_HELP,
1484     TCC_OPTION_HELP2,
1485     TCC_OPTION_v,
1486     TCC_OPTION_I,
1487     TCC_OPTION_D,
1488     TCC_OPTION_U,
1489     TCC_OPTION_P,
1490     TCC_OPTION_L,
1491     TCC_OPTION_B,
1492     TCC_OPTION_l,
1493     TCC_OPTION_bench,
1494     TCC_OPTION_bt,
1495     TCC_OPTION_b,
1496     TCC_OPTION_ba,
1497     TCC_OPTION_g,
1498     TCC_OPTION_c,
1499     TCC_OPTION_dumpversion,
1500     TCC_OPTION_d,
1501     TCC_OPTION_static,
1502     TCC_OPTION_std,
1503     TCC_OPTION_shared,
1504     TCC_OPTION_soname,
1505     TCC_OPTION_o,
1506     TCC_OPTION_r,
1507     TCC_OPTION_s,
1508     TCC_OPTION_traditional,
1509     TCC_OPTION_Wl,
1510     TCC_OPTION_Wp,
1511     TCC_OPTION_W,
1512     TCC_OPTION_O,
1513     TCC_OPTION_mfloat_abi,
1514     TCC_OPTION_m,
1515     TCC_OPTION_f,
1516     TCC_OPTION_isystem,
1517     TCC_OPTION_iwithprefix,
1518     TCC_OPTION_include,
1519     TCC_OPTION_nostdinc,
1520     TCC_OPTION_nostdlib,
1521     TCC_OPTION_print_search_dirs,
1522     TCC_OPTION_rdynamic,
1523     TCC_OPTION_param,
1524     TCC_OPTION_pedantic,
1525     TCC_OPTION_pthread,
1526     TCC_OPTION_run,
1527     TCC_OPTION_w,
1528     TCC_OPTION_pipe,
1529     TCC_OPTION_E,
1530     TCC_OPTION_MD,
1531     TCC_OPTION_MF,
1532     TCC_OPTION_x,
1533     TCC_OPTION_ar,
1534     TCC_OPTION_impdef
1535 };
1536
1537 #define TCC_OPTION_HAS_ARG 0x0001
1538 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1539
1540 static const TCCOption tcc_options[] = {
1541     { "h", TCC_OPTION_HELP, 0 },
1542     { "-help", TCC_OPTION_HELP, 0 },
1543     { "?", TCC_OPTION_HELP, 0 },
1544     { "hh", TCC_OPTION_HELP2, 0 },
1545     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1546     { "-version", TCC_OPTION_v, 0 }, /* handle as verbose, also prints version*/
1547     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1548     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1549     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1550     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1551     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1552     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1553     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1554     { "bench", TCC_OPTION_bench, 0 },
1555 #ifdef CONFIG_TCC_BACKTRACE
1556     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1557 #endif
1558 #ifdef CONFIG_TCC_BCHECK
1559     { "b", TCC_OPTION_b, 0 },
1560 #endif
1561     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1562     { "c", TCC_OPTION_c, 0 },
1563     { "dumpversion", TCC_OPTION_dumpversion, 0},
1564     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1565     { "static", TCC_OPTION_static, 0 },
1566     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1567     { "shared", TCC_OPTION_shared, 0 },
1568     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1569     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1570     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1571     { "pedantic", TCC_OPTION_pedantic, 0},
1572     { "pthread", TCC_OPTION_pthread, 0},
1573     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1574     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1575     { "r", TCC_OPTION_r, 0 },
1576     { "s", TCC_OPTION_s, 0 },
1577     { "traditional", TCC_OPTION_traditional, 0 },
1578     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1579     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1580     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1581     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1582 #ifdef TCC_TARGET_ARM
1583     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1584 #endif
1585     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1586     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1587     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1588     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1589     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1590     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1591     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1592     { "w", TCC_OPTION_w, 0 },
1593     { "pipe", TCC_OPTION_pipe, 0},
1594     { "E", TCC_OPTION_E, 0},
1595     { "MD", TCC_OPTION_MD, 0},
1596     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1597     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1598     { "ar", TCC_OPTION_ar, 0},
1599 #ifdef TCC_TARGET_PE
1600     { "impdef", TCC_OPTION_impdef, 0},
1601 #endif
1602     { NULL, 0, 0 },
1603 };
1604
1605 static const FlagDef options_W[] = {
1606     { 0, 0, "all" },
1607     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1608     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1609     { offsetof(TCCState, warn_error), 0, "error" },
1610     { offsetof(TCCState, warn_gcc_compat), 0, "gcc-compat" },
1611     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1612       "implicit-function-declaration" },
1613     { 0, 0, NULL }
1614 };
1615
1616 static const FlagDef options_f[] = {
1617     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1618     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1619     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1620     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1621     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1622     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1623     { 0, 0, NULL }
1624 };
1625
1626 static const FlagDef options_m[] = {
1627     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1628 #ifdef TCC_TARGET_X86_64
1629     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1630 #endif
1631     { 0, 0, NULL }
1632 };
1633
1634 static void parse_option_D(TCCState *s1, const char *optarg)
1635 {
1636     char *sym = tcc_strdup(optarg);
1637     char *value = strchr(sym, '=');
1638     if (value)
1639         *value++ = '\0';
1640     tcc_define_symbol(s1, sym, value);
1641     tcc_free(sym);
1642 }
1643
1644 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1645 {
1646     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1647     f->type = filetype;
1648     strcpy(f->name, filename);
1649     dynarray_add(&s->files, &s->nb_files, f);
1650 }
1651
1652 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1653 {
1654     int ret = 0, q, c;
1655     CString str;
1656     for(;;) {
1657         while (c = (unsigned char)*r, c && c <= ' ')
1658           ++r;
1659         if (c == 0)
1660             break;
1661         q = 0;
1662         cstr_new(&str);
1663         while (c = (unsigned char)*r, c) {
1664             ++r;
1665             if (c == '\\' && (*r == '"' || *r == '\\')) {
1666                 c = *r++;
1667             } else if (c == '"') {
1668                 q = !q;
1669                 continue;
1670             } else if (q == 0 && c <= ' ') {
1671                 break;
1672             }
1673             cstr_ccat(&str, c);
1674         }
1675         cstr_ccat(&str, 0);
1676         //printf("<%s>\n", str.data), fflush(stdout);
1677         dynarray_add(argv, argc, tcc_strdup(str.data));
1678         cstr_free(&str);
1679         ++ret;
1680     }
1681     return ret;
1682 }
1683
1684 /* read list file */
1685 static void args_parser_listfile(TCCState *s,
1686     const char *filename, int optind, int *pargc, char ***pargv)
1687 {
1688     TCCState *s1 = s;
1689     int fd, i;
1690     size_t len;
1691     char *p;
1692     int argc = 0;
1693     char **argv = NULL;
1694
1695     fd = open(filename, O_RDONLY | O_BINARY);
1696     if (fd < 0)
1697         tcc_error("listfile '%s' not found", filename);
1698
1699     len = lseek(fd, 0, SEEK_END);
1700     p = tcc_malloc(len + 1), p[len] = 0;
1701     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1702
1703     for (i = 0; i < *pargc; ++i)
1704         if (i == optind)
1705             args_parser_make_argv(p, &argc, &argv);
1706         else
1707             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1708
1709     tcc_free(p);
1710     dynarray_reset(&s->argv, &s->argc);
1711     *pargc = s->argc = argc, *pargv = s->argv = argv;
1712 }
1713
1714 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1715 {
1716     TCCState *s1 = s;
1717     const TCCOption *popt;
1718     const char *optarg, *r;
1719     const char *run = NULL;
1720     int last_o = -1;
1721     int x;
1722     CString linker_arg; /* collect -Wl options */
1723     int tool = 0, arg_start = 0, noaction = optind;
1724     char **argv = *pargv;
1725     int argc = *pargc;
1726
1727     cstr_new(&linker_arg);
1728
1729     while (optind < argc) {
1730         r = argv[optind];
1731         if (r[0] == '@' && r[1] != '\0') {
1732             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1733             continue;
1734         }
1735         optind++;
1736         if (tool) {
1737             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1738                 ++s->verbose;
1739             continue;
1740         }
1741 reparse:
1742         if (r[0] != '-' || r[1] == '\0') {
1743             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1744                 args_parser_add_file(s, r, s->filetype);
1745             if (run) {
1746                 tcc_set_options(s, run);
1747                 arg_start = optind - 1;
1748                 break;
1749             }
1750             continue;
1751         }
1752
1753         /* find option in table */
1754         for(popt = tcc_options; ; ++popt) {
1755             const char *p1 = popt->name;
1756             const char *r1 = r + 1;
1757             if (p1 == NULL)
1758                 tcc_error("invalid option -- '%s'", r);
1759             if (!strstart(p1, &r1))
1760                 continue;
1761             optarg = r1;
1762             if (popt->flags & TCC_OPTION_HAS_ARG) {
1763                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1764                     if (optind >= argc)
1765                 arg_err:
1766                         tcc_error("argument to '%s' is missing", r);
1767                     optarg = argv[optind++];
1768                 }
1769             } else if (*r1 != '\0')
1770                 continue;
1771             break;
1772         }
1773
1774         switch(popt->index) {
1775         case TCC_OPTION_HELP:
1776             return OPT_HELP;
1777         case TCC_OPTION_HELP2:
1778             return OPT_HELP2;
1779         case TCC_OPTION_I:
1780             tcc_add_include_path(s, optarg);
1781             break;
1782         case TCC_OPTION_D:
1783             parse_option_D(s, optarg);
1784             break;
1785         case TCC_OPTION_U:
1786             tcc_undefine_symbol(s, optarg);
1787             break;
1788         case TCC_OPTION_L:
1789             tcc_add_library_path(s, optarg);
1790             break;
1791         case TCC_OPTION_B:
1792             /* set tcc utilities path (mainly for tcc development) */
1793             tcc_set_lib_path(s, optarg);
1794             break;
1795         case TCC_OPTION_l:
1796             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1797             s->nb_libraries++;
1798             break;
1799         case TCC_OPTION_pthread:
1800             parse_option_D(s, "_REENTRANT");
1801             s->option_pthread = 1;
1802             break;
1803         case TCC_OPTION_bench:
1804             s->do_bench = 1;
1805             break;
1806 #ifdef CONFIG_TCC_BACKTRACE
1807         case TCC_OPTION_bt:
1808             s->rt_num_callers = atoi(optarg);
1809             s->do_backtrace = 1;
1810             s->do_debug = 1;
1811             break;
1812 #endif
1813 #ifdef CONFIG_TCC_BCHECK
1814         case TCC_OPTION_b:
1815             s->do_bounds_check = 1;
1816             s->do_backtrace = 1;
1817             s->do_debug = 1;
1818             break;
1819 #endif
1820         case TCC_OPTION_g:
1821             s->do_debug = 1;
1822             break;
1823         case TCC_OPTION_c:
1824             x = TCC_OUTPUT_OBJ;
1825         set_output_type:
1826             if (s->output_type)
1827                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1828             s->output_type = x;
1829             break;
1830         case TCC_OPTION_d:
1831             if (*optarg == 'D')
1832                 s->dflag = 3;
1833             else if (*optarg == 'M')
1834                 s->dflag = 7;
1835             else if (*optarg == 't')
1836                 s->dflag = 16;
1837             else if (isnum(*optarg))
1838                 s->g_debug |= atoi(optarg);
1839             else
1840                 goto unsupported_option;
1841             break;
1842         case TCC_OPTION_static:
1843             s->static_link = 1;
1844             break;
1845         case TCC_OPTION_std:
1846             if (*optarg == '=') {
1847                 if (strcmp(optarg, "=c11") == 0) {
1848                     tcc_undefine_symbol(s, "__STDC_VERSION__");
1849                     tcc_define_symbol(s, "__STDC_VERSION__", "201112L");
1850                     /*
1851                      * The integer constant 1, intended to indicate
1852                      * that the implementation does not support atomic
1853                      * types (including the _Atomic type qualiﬁer) and
1854                      * the <stdatomic.h> header.
1855                      */
1856                     tcc_define_symbol(s, "__STDC_NO_ATOMICS__", "1");
1857                     /*
1858                      * The integer constant 1, intended to indicate
1859                      * that the implementation does not support complex
1860                      * types or the <complex.h> header.
1861                      */
1862                     tcc_define_symbol(s, "__STDC_NO_COMPLEX__", "1");
1863                     /*
1864                      * The integer constant 1, intended to indicate
1865                      * that the implementation does not support the
1866                      * <threads.h> header.
1867                      */
1868                     tcc_define_symbol(s, "__STDC_NO_THREADS__", "1");
1869                     /*
1870                      * __STDC_NO_VLA__, tcc supports VLA.
1871                      * The integer constant 1, intended to indicate
1872                      * that the implementation does not support
1873                      * variable length arrays or variably modiﬁed
1874                      * types.
1875                      */
1876 #if !defined(TCC_TARGET_PE)
1877                     /*
1878                      * An integer constant of the form yyyymmL (for
1879                      * example, 199712L). If this symbol is deﬁned,
1880                      * then every character in the Unicode required
1881                      * set, when stored in an object of type
1882                      * wchar_t, has the same value as the short
1883                      * identiﬁer of that character.
1884                      */
1885                     #if 0
1886                     /* on Linux, this conflicts with a define introduced by
1887                      * /usr/include/stdc-predef.h included by glibc libs;
1888                      * clang doesn't define it at all so it's probably not necessary
1889                      */
1890                     tcc_define_symbol(s, "__STDC_ISO_10646__", "201605L");
1891                     #endif
1892                     /*
1893                      * The integer constant 1, intended to indicate
1894                      * that values of type char16_t are UTF−16
1895                      * encoded. If some other encoding is used, the
1896                      * macro shall not be deﬁned and the actual
1897                      * encoding used is implementation deﬁned.
1898                      */
1899                     tcc_define_symbol(s, "__STDC_UTF_16__", "1");
1900                     /*
1901                      * The integer constant 1, intended to indicate
1902                      * that values of type char32_t are UTF−32
1903                      * encoded. If some other encoding is used, the
1904                      * macro shall not be deﬁned and the actual
1905                      * encoding used is implementationdeﬁned.
1906                      */
1907                     tcc_define_symbol(s, "__STDC_UTF_32__", "1");
1908 #endif /* !TCC_TARGET_PE */
1909                     s->cversion = 201112;
1910                 }
1911             }
1912             /*
1913              * silently ignore other values, a current purpose:
1914              * allow to use a tcc as a reference compiler for "make test"
1915              */
1916             break;
1917         case TCC_OPTION_shared:
1918             x = TCC_OUTPUT_DLL;
1919             goto set_output_type;
1920         case TCC_OPTION_soname:
1921             s->soname = tcc_strdup(optarg);
1922             break;
1923         case TCC_OPTION_o:
1924             if (s->outfile) {
1925                 tcc_warning("multiple -o option");
1926                 tcc_free(s->outfile);
1927             }
1928             s->outfile = tcc_strdup(optarg);
1929             break;
1930         case TCC_OPTION_r:
1931             /* generate a .o merging several output files */
1932             s->option_r = 1;
1933             x = TCC_OUTPUT_OBJ;
1934             goto set_output_type;
1935         case TCC_OPTION_isystem:
1936             tcc_add_sysinclude_path(s, optarg);
1937             break;
1938         case TCC_OPTION_include:
1939             cstr_printf(&s->cmdline_incl, "#include \"%s\"\n", optarg);
1940             break;
1941         case TCC_OPTION_nostdinc:
1942             s->nostdinc = 1;
1943             break;
1944         case TCC_OPTION_nostdlib:
1945             s->nostdlib = 1;
1946             break;
1947         case TCC_OPTION_run:
1948 #ifndef TCC_IS_NATIVE
1949             tcc_error("-run is not available in a cross compiler");
1950 #endif
1951             run = optarg;
1952             x = TCC_OUTPUT_MEMORY;
1953             goto set_output_type;
1954         case TCC_OPTION_v:
1955             do ++s->verbose; while (*optarg++ == 'v');
1956             ++noaction;
1957             break;
1958         case TCC_OPTION_f:
1959             if (set_flag(s, options_f, optarg) < 0)
1960                 goto unsupported_option;
1961             break;
1962 #ifdef TCC_TARGET_ARM
1963         case TCC_OPTION_mfloat_abi:
1964             /* tcc doesn't support soft float yet */
1965             if (!strcmp(optarg, "softfp")) {
1966                 s->float_abi = ARM_SOFTFP_FLOAT;
1967                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1968             } else if (!strcmp(optarg, "hard"))
1969                 s->float_abi = ARM_HARD_FLOAT;
1970             else
1971                 tcc_error("unsupported float abi '%s'", optarg);
1972             break;
1973 #endif
1974         case TCC_OPTION_m:
1975             if (set_flag(s, options_m, optarg) < 0) {
1976                 if (x = atoi(optarg), x != 32 && x != 64)
1977                     goto unsupported_option;
1978                 if (PTR_SIZE != x/8)
1979                     return x;
1980                 ++noaction;
1981             }
1982             break;
1983         case TCC_OPTION_W:
1984             s->warn_none = 0;
1985             if (optarg[0] && set_flag(s, options_W, optarg) < 0)
1986                 goto unsupported_option;
1987             break;
1988         case TCC_OPTION_w:
1989             s->warn_none = 1;
1990             break;
1991         case TCC_OPTION_rdynamic:
1992             s->rdynamic = 1;
1993             break;
1994         case TCC_OPTION_Wl:
1995             if (linker_arg.size)
1996                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1997             cstr_cat(&linker_arg, optarg, 0);
1998             if (tcc_set_linker(s, linker_arg.data))
1999                 cstr_free(&linker_arg);
2000             break;
2001         case TCC_OPTION_Wp:
2002             r = optarg;
2003             goto reparse;
2004         case TCC_OPTION_E:
2005             x = TCC_OUTPUT_PREPROCESS;
2006             goto set_output_type;
2007         case TCC_OPTION_P:
2008             s->Pflag = atoi(optarg) + 1;
2009             break;
2010         case TCC_OPTION_MD:
2011             s->gen_deps = 1;
2012             break;
2013         case TCC_OPTION_MF:
2014             s->deps_outfile = tcc_strdup(optarg);
2015             break;
2016         case TCC_OPTION_dumpversion:
2017             printf ("%s\n", TCC_VERSION);
2018             exit(0);
2019             break;
2020         case TCC_OPTION_x:
2021             x = 0;
2022             if (*optarg == 'c')
2023                 x = AFF_TYPE_C;
2024             else if (*optarg == 'a')
2025                 x = AFF_TYPE_ASMPP;
2026             else if (*optarg == 'b')
2027                 x = AFF_TYPE_BIN;
2028             else if (*optarg == 'n')
2029                 x = AFF_TYPE_NONE;
2030             else
2031                 tcc_warning("unsupported language '%s'", optarg);
2032             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
2033             break;
2034         case TCC_OPTION_O:
2035             last_o = atoi(optarg);
2036             break;
2037         case TCC_OPTION_print_search_dirs:
2038             x = OPT_PRINT_DIRS;
2039             goto extra_action;
2040         case TCC_OPTION_impdef:
2041             x = OPT_IMPDEF;
2042             goto extra_action;
2043         case TCC_OPTION_ar:
2044             x = OPT_AR;
2045         extra_action:
2046             arg_start = optind - 1;
2047             if (arg_start != noaction)
2048                 tcc_error("cannot parse %s here", r);
2049             tool = x;
2050             break;
2051         case TCC_OPTION_traditional:
2052         case TCC_OPTION_pedantic:
2053         case TCC_OPTION_pipe:
2054         case TCC_OPTION_s:
2055             /* ignored */
2056             break;
2057         default:
2058 unsupported_option:
2059             if (s->warn_unsupported)
2060                 tcc_warning("unsupported option '%s'", r);
2061             break;
2062         }
2063     }
2064     if (last_o > 0)
2065         tcc_define_symbol(s, "__OPTIMIZE__", NULL);
2066     if (linker_arg.size) {
2067         r = linker_arg.data;
2068         goto arg_err;
2069     }
2070     *pargc = argc - arg_start;
2071     *pargv = argv + arg_start;
2072     if (tool)
2073         return tool;
2074     if (optind != noaction)
2075         return 0;
2076     if (s->verbose == 2)
2077         return OPT_PRINT_DIRS;
2078     if (s->verbose)
2079         return OPT_V;
2080     return OPT_HELP;
2081 }
2082
2083 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
2084 {
2085     char **argv = NULL;
2086     int argc = 0;
2087     args_parser_make_argv(r, &argc, &argv);
2088     tcc_parse_args(s, &argc, &argv, 0);
2089     dynarray_reset(&argv, &argc);
2090 }
2091
2092 PUB_FUNC void tcc_print_stats(TCCState *s1, unsigned total_time)
2093 {
2094     if (total_time < 1)
2095         total_time = 1;
2096     if (total_bytes < 1)
2097         total_bytes = 1;
2098     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
2099                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
2100            total_idents, total_lines, total_bytes,
2101            (double)total_time/1000,
2102            (unsigned)total_lines*1000/total_time,
2103            (double)total_bytes/1000/total_time);
2104 #ifdef MEM_DEBUG
2105     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
2106 #endif
2107 }