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 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 static int nb_states;
  36
  37 /********************************************************/
  38
  39 #ifdef ONE_SOURCE
  40 #include "tccpp.c"
  41 #include "tccgen.c"
  42 #include "tccelf.c"
  43 #include "tccrun.c"
  44 #ifdef TCC_TARGET_I386
  45 #include "i386-gen.c"
  46 #include "i386-link.c"
  47 #endif
  48 #ifdef TCC_TARGET_ARM
  49 #include "arm-gen.c"
  50 #include "arm-link.c"
  51 #endif
  52 #ifdef TCC_TARGET_ARM64
  53 #include "arm64-gen.c"
  54 #include "arm64-link.c"
  55 #endif
  56 #ifdef TCC_TARGET_C67
  57 #include "c67-gen.c"
  58 #include "c67-link.c"
  59 #endif
  60 #ifdef TCC_TARGET_X86_64
  61 #include "x86_64-gen.c"
  62 #include "x86_64-link.c"
  63 #endif
  64 #ifdef CONFIG_TCC_ASM
  65 #include "tccasm.c"
  66 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  67 #include "i386-asm.c"
  68 #endif
  69 #endif
  70 #ifdef TCC_TARGET_COFF
  71 #include "tcccoff.c"
  72 #endif
  73 #ifdef TCC_TARGET_PE
  74 #include "tccpe.c"
  75 #endif
  76 #endif /* ONE_SOURCE */
  77
  78 /********************************************************/
  79 #ifndef CONFIG_TCC_ASM
  80 ST_FUNC void asm_instr(void)
  81 {
  82     tcc_error("inline asm() not supported");
  83 }
  84 ST_FUNC void asm_global_instr(void)
  85 {
  86     tcc_error("inline asm() not supported");
  87 }
  88 #endif
  89
  90 /********************************************************/
  91 #ifdef _WIN32
  92 ST_FUNC char *normalize_slashes(char *path)
  93 {
  94     char *p;
  95     for (p = path; *p; ++p)
  96         if (*p == '\\')
  97             *p = '/';
  98     return path;
  99 }
 100
 101 static HMODULE tcc_module;
 102
 103 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 104 static void tcc_set_lib_path_w32(TCCState *s)
 105 {
 106     char path[1024], *p;
 107     GetModuleFileNameA(tcc_module, path, sizeof path);
 108     p = tcc_basename(normalize_slashes(strlwr(path)));
 109     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 110         p -= 5;
 111     else if (p > path)
 112         p--;
 113     *p = 0;
 114     tcc_set_lib_path(s, path);
 115 }
 116
 117 #ifdef TCC_TARGET_PE
 118 static void tcc_add_systemdir(TCCState *s)
 119 {
 120     char buf[1000];
 121     GetSystemDirectory(buf, sizeof buf);
 122     tcc_add_library_path(s, normalize_slashes(buf));
 123 }
 124 #endif
 125
 126 #ifdef LIBTCC_AS_DLL
 127 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 128 {
 129     if (DLL_PROCESS_ATTACH == dwReason)
 130         tcc_module = hDll;
 131     return TRUE;
 132 }
 133 #endif
 134 #endif
 135
 136 /********************************************************/
 137 /* copy a string and truncate it. */
 138 ST_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 139 {
 140     char *q, *q_end;
 141     int c;
 142
 143     if (buf_size > 0) {
 144         q = buf;
 145         q_end = buf + buf_size - 1;
 146         while (q < q_end) {
 147             c = *s++;
 148             if (c == '\0')
 149                 break;
 150             *q++ = c;
 151         }
 152         *q = '\0';
 153     }
 154     return buf;
 155 }
 156
 157 /* strcat and truncate. */
 158 ST_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 159 {
 160     int len;
 161     len = strlen(buf);
 162     if (len < buf_size)
 163         pstrcpy(buf + len, buf_size - len, s);
 164     return buf;
 165 }
 166
 167 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 168 {
 169     memcpy(out, in, num);
 170     out[num] = '\0';
 171     return out;
 172 }
 173
 174 /* extract the basename of a file */
 175 PUB_FUNC char *tcc_basename(const char *name)
 176 {
 177     char *p = strchr(name, 0);
 178     while (p > name && !IS_DIRSEP(p[-1]))
 179         --p;
 180     return p;
 181 }
 182
 183 /* extract extension part of a file
 184  *
 185  * (if no extension, return pointer to end-of-string)
 186  */
 187 PUB_FUNC char *tcc_fileextension (const char *name)
 188 {
 189     char *b = tcc_basename(name);
 190     char *e = strrchr(b, '.');
 191     return e ? e : strchr(b, 0);
 192 }
 193
 194 /********************************************************/
 195 /* memory management */
 196
 197 #undef free
 198 #undef malloc
 199 #undef realloc
 200
 201 #ifndef MEM_DEBUG
 202
 203 PUB_FUNC void tcc_free(void *ptr)
 204 {
 205     free(ptr);
 206 }
 207
 208 PUB_FUNC void *tcc_malloc(unsigned long size)
 209 {
 210     void *ptr;
 211     ptr = malloc(size);
 212     if (!ptr && size)
 213         tcc_error("memory full (malloc)");
 214     return ptr;
 215 }
 216
 217 PUB_FUNC void *tcc_mallocz(unsigned long size)
 218 {
 219     void *ptr;
 220     ptr = tcc_malloc(size);
 221     memset(ptr, 0, size);
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 226 {
 227     void *ptr1;
 228     ptr1 = realloc(ptr, size);
 229     if (!ptr1 && size)
 230         tcc_error("memory full (realloc)");
 231     return ptr1;
 232 }
 233
 234 PUB_FUNC char *tcc_strdup(const char *str)
 235 {
 236     char *ptr;
 237     ptr = tcc_malloc(strlen(str) + 1);
 238     strcpy(ptr, str);
 239     return ptr;
 240 }
 241
 242 PUB_FUNC void tcc_memcheck(void)
 243 {
 244 }
 245
 246 #else
 247
 248 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 249 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 250 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 251 #define MEM_DEBUG_FILE_LEN 40
 252 #define MEM_DEBUG_CHECK3(header) \
 253     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 254 #define MEM_USER_PTR(header) \
 255     ((char *)header + offsetof(mem_debug_header_t, magic3))
 256 #define MEM_HEADER_PTR(ptr) \
 257     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 258
 259 struct mem_debug_header {
 260     unsigned magic1;
 261     unsigned size;
 262     struct mem_debug_header *prev;
 263     struct mem_debug_header *next;
 264     int line_num;
 265     char file_name[MEM_DEBUG_FILE_LEN + 1];
 266     unsigned magic2;
 267     __attribute__((aligned(16))) unsigned magic3;
 268 };
 269
 270 typedef struct mem_debug_header mem_debug_header_t;
 271
 272 static mem_debug_header_t *mem_debug_chain;
 273 static unsigned mem_cur_size;
 274 static unsigned mem_max_size;
 275
 276 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 277 {
 278     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 279     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 280         header->magic2 != MEM_DEBUG_MAGIC2 ||
 281         MEM_DEBUG_CHECK3(header) != MEM_DEBUG_MAGIC3 ||
 282         header->size == (unsigned)-1) {
 283         fprintf(stderr, "%s check failed\n", msg);
 284         if (header->magic1 == MEM_DEBUG_MAGIC1)
 285             fprintf(stderr, "%s:%u: block allocated here.\n",
 286                 header->file_name, header->line_num);
 287         exit(1);
 288     }
 289     return header;
 290 }
 291
 292 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 293 {
 294     int ofs;
 295     mem_debug_header_t *header;
 296
 297     header = malloc(sizeof(mem_debug_header_t) + size);
 298     if (!header)
 299         tcc_error("memory full (malloc)");
 300
 301     header->magic1 = MEM_DEBUG_MAGIC1;
 302     header->magic2 = MEM_DEBUG_MAGIC2;
 303     header->size = size;
 304     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 305     header->line_num = line;
 306     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 307     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 308     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 309
 310     header->next = mem_debug_chain;
 311     header->prev = NULL;
 312     if (header->next)
 313         header->next->prev = header;
 314     mem_debug_chain = header;
 315
 316     mem_cur_size += size;
 317     if (mem_cur_size > mem_max_size)
 318         mem_max_size = mem_cur_size;
 319
 320     return MEM_USER_PTR(header);
 321 }
 322
 323 PUB_FUNC void tcc_free_debug(void *ptr)
 324 {
 325     mem_debug_header_t *header;
 326     if (!ptr)
 327         return;
 328     header = malloc_check(ptr, "tcc_free");
 329     mem_cur_size -= header->size;
 330     header->size = (unsigned)-1;
 331     if (header->next)
 332         header->next->prev = header->prev;
 333     if (header->prev)
 334         header->prev->next = header->next;
 335     if (header == mem_debug_chain)
 336         mem_debug_chain = header->next;
 337     free(header);
 338 }
 339
 340 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 341 {
 342     void *ptr;
 343     ptr = tcc_malloc_debug(size,file,line);
 344     memset(ptr, 0, size);
 345     return ptr;
 346 }
 347
 348 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 349 {
 350     mem_debug_header_t *header;
 351     int mem_debug_chain_update = 0;
 352     if (!ptr)
 353         return tcc_malloc_debug(size, file, line);
 354     header = malloc_check(ptr, "tcc_realloc");
 355     mem_cur_size -= header->size;
 356     mem_debug_chain_update = (header == mem_debug_chain);
 357     header = realloc(header, sizeof(mem_debug_header_t) + size);
 358     if (!header)
 359         tcc_error("memory full (realloc)");
 360     header->size = size;
 361     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 362     if (header->next)
 363         header->next->prev = header;
 364     if (header->prev)
 365         header->prev->next = header;
 366     if (mem_debug_chain_update)
 367         mem_debug_chain = header;
 368     mem_cur_size += size;
 369     if (mem_cur_size > mem_max_size)
 370         mem_max_size = mem_cur_size;
 371     return MEM_USER_PTR(header);
 372 }
 373
 374 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 375 {
 376     char *ptr;
 377     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 378     strcpy(ptr, str);
 379     return ptr;
 380 }
 381
 382 PUB_FUNC void tcc_memcheck(void)
 383 {
 384     if (mem_cur_size) {
 385         mem_debug_header_t *header = mem_debug_chain;
 386         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 387             mem_cur_size, mem_max_size);
 388         while (header) {
 389             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 390                 header->file_name, header->line_num, header->size);
 391             header = header->next;
 392         }
 393 #if MEM_DEBUG-0 == 2
 394         exit(2);
 395 #endif
 396     }
 397 }
 398 #endif /* MEM_DEBUG */
 399
 400 #define free(p) use_tcc_free(p)
 401 #define malloc(s) use_tcc_malloc(s)
 402 #define realloc(p, s) use_tcc_realloc(p, s)
 403
 404 /********************************************************/
 405 /* dynarrays */
 406
 407 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 408 {
 409     int nb, nb_alloc;
 410     void **pp;
 411
 412     nb = *nb_ptr;
 413     pp = *(void ***)ptab;
 414     /* every power of two we double array size */
 415     if ((nb & (nb - 1)) == 0) {
 416         if (!nb)
 417             nb_alloc = 1;
 418         else
 419             nb_alloc = nb * 2;
 420         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 421         *(void***)ptab = pp;
 422     }
 423     pp[nb++] = data;
 424     *nb_ptr = nb;
 425 }
 426
 427 ST_FUNC void dynarray_reset(void *pp, int *n)
 428 {
 429     void **p;
 430     for (p = *(void***)pp; *n; ++p, --*n)
 431         if (*p)
 432             tcc_free(*p);
 433     tcc_free(*(void**)pp);
 434     *(void**)pp = NULL;
 435 }
 436
 437 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 438 {
 439     const char *p;
 440     do {
 441         int c;
 442         CString str;
 443
 444         cstr_new(&str);
 445         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 446             if (c == '{' && p[1] && p[2] == '}') {
 447                 c = p[1], p += 2;
 448                 if (c == 'B')
 449                     cstr_cat(&str, s->tcc_lib_path, -1);
 450             } else {
 451                 cstr_ccat(&str, c);
 452             }
 453         }
 454         if (str.size) {
 455             cstr_ccat(&str, '\0');
 456             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 457         }
 458         cstr_free(&str);
 459         in = p+1;
 460     } while (*p);
 461 }
 462
 463 /********************************************************/
 464
 465 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 466 {
 467     int len;
 468     len = strlen(buf);
 469     vsnprintf(buf + len, buf_size - len, fmt, ap);
 470 }
 471
 472 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 473 {
 474     va_list ap;
 475     va_start(ap, fmt);
 476     strcat_vprintf(buf, buf_size, fmt, ap);
 477     va_end(ap);
 478 }
 479
 480 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 481 {
 482     char buf[2048];
 483     BufferedFile **pf, *f;
 484
 485     buf[0] = '\0';
 486     /* use upper file if inline ":asm:" or token ":paste:" */
 487     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 488      ;
 489     if (f) {
 490         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 491             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 492                 (*pf)->filename, (*pf)->line_num);
 493         if (f->line_num > 0) {
 494             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 495                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 496         } else {
 497             strcat_printf(buf, sizeof(buf), "%s: ",
 498                 f->filename);
 499         }
 500     } else {
 501         strcat_printf(buf, sizeof(buf), "tcc: ");
 502     }
 503     if (is_warning)
 504         strcat_printf(buf, sizeof(buf), "warning: ");
 505     else
 506         strcat_printf(buf, sizeof(buf), "error: ");
 507     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 508
 509     if (!s1->error_func) {
 510         /* default case: stderr */
 511         if (s1->ppfp) /* print a newline during tcc -E */
 512             fprintf(s1->ppfp, "\n"), fflush(s1->ppfp);
 513         fflush(stdout); /* flush -v output */
 514         fprintf(stderr, "%s\n", buf);
 515         fflush(stderr); /* print error/warning now (win32) */
 516     } else {
 517         s1->error_func(s1->error_opaque, buf);
 518     }
 519     if (!is_warning || s1->warn_error)
 520         s1->nb_errors++;
 521 }
 522
 523 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 524                         void (*error_func)(void *opaque, const char *msg))
 525 {
 526     s->error_opaque = error_opaque;
 527     s->error_func = error_func;
 528 }
 529
 530 /* error without aborting current compilation */
 531 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 532 {
 533     TCCState *s1 = tcc_state;
 534     va_list ap;
 535
 536     va_start(ap, fmt);
 537     error1(s1, 0, fmt, ap);
 538     va_end(ap);
 539 }
 540
 541 PUB_FUNC void tcc_error(const char *fmt, ...)
 542 {
 543     TCCState *s1 = tcc_state;
 544     va_list ap;
 545
 546     va_start(ap, fmt);
 547     error1(s1, 0, fmt, ap);
 548     va_end(ap);
 549     /* better than nothing: in some cases, we accept to handle errors */
 550     if (s1->error_set_jmp_enabled) {
 551         longjmp(s1->error_jmp_buf, 1);
 552     } else {
 553         /* XXX: eliminate this someday */
 554         exit(1);
 555     }
 556 }
 557
 558 PUB_FUNC void tcc_warning(const char *fmt, ...)
 559 {
 560     TCCState *s1 = tcc_state;
 561     va_list ap;
 562
 563     if (s1->warn_none)
 564         return;
 565
 566     va_start(ap, fmt);
 567     error1(s1, 1, fmt, ap);
 568     va_end(ap);
 569 }
 570
 571 /********************************************************/
 572 /* I/O layer */
 573
 574 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 575 {
 576     BufferedFile *bf;
 577     int buflen = initlen ? initlen : IO_BUF_SIZE;
 578
 579     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 580     bf->buf_ptr = bf->buffer;
 581     bf->buf_end = bf->buffer + initlen;
 582     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 583     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 584     pstrcpy(bf->filename2, sizeof(bf->filename2), filename);
 585 #ifdef _WIN32
 586     normalize_slashes(bf->filename);
 587 #endif
 588     bf->line_num = 1;
 589     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 590     bf->fd = -1;
 591     bf->prev = file;
 592     file = bf;
 593 }
 594
 595 ST_FUNC void tcc_close(void)
 596 {
 597     BufferedFile *bf = file;
 598     if (bf->fd > 0) {
 599         close(bf->fd);
 600         total_lines += bf->line_num;
 601     }
 602     file = bf->prev;
 603     tcc_free(bf);
 604 }
 605
 606 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 607 {
 608     int fd;
 609     if (strcmp(filename, "-") == 0)
 610         fd = 0, filename = "<stdin>";
 611     else
 612         fd = open(filename, O_RDONLY | O_BINARY);
 613     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 614         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 615                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 616     if (fd < 0)
 617         return -1;
 618
 619     tcc_open_bf(s1, filename, 0);
 620     file->fd = fd;
 621     return fd;
 622 }
 623
 624 /* compile the C file opened in 'file'. Return non zero if errors. */
 625 static int tcc_compile(TCCState *s1)
 626 {
 627     Sym *define_start;
 628
 629     define_start = define_stack;
 630     if (setjmp(s1->error_jmp_buf) == 0) {
 631         s1->nb_errors = 0;
 632         s1->error_set_jmp_enabled = 1;
 633
 634         preprocess_start(s1);
 635         tccgen_start(s1);
 636
 637 #ifdef INC_DEBUG
 638         printf("%s: **** new file\n", file->filename);
 639 #endif
 640
 641         ch = file->buf_ptr[0];
 642         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 643         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
 644         next();
 645         decl(VT_CONST);
 646         if (tok != TOK_EOF)
 647             expect("declaration");
 648         /* free defines here already on behalf of of M.M.'s possibly existing
 649            experimental preprocessor implementation. The normal call below
 650            is still there to free after error-longjmp */
 651         free_defines(define_start);
 652         tccgen_end(s1);
 653     }
 654     s1->error_set_jmp_enabled = 0;
 655
 656     free_inline_functions(s1);
 657     /* reset define stack, but keep -D and built-ins */
 658     free_defines(define_start);
 659     sym_pop(&global_stack, NULL, 0);
 660     sym_pop(&local_stack, NULL, 0);
 661     return s1->nb_errors != 0 ? -1 : 0;
 662 }
 663
 664 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 665 {
 666     int len, ret;
 667
 668     len = strlen(str);
 669     tcc_open_bf(s, "<string>", len);
 670     memcpy(file->buffer, str, len);
 671     ret = tcc_compile(s);
 672     tcc_close();
 673     return ret;
 674 }
 675
 676 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 677 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 678 {
 679     int len1, len2;
 680     /* default value */
 681     if (!value)
 682         value = "1";
 683     len1 = strlen(sym);
 684     len2 = strlen(value);
 685
 686     /* init file structure */
 687     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 688     memcpy(file->buffer, sym, len1);
 689     file->buffer[len1] = ' ';
 690     memcpy(file->buffer + len1 + 1, value, len2);
 691
 692     /* parse with define parser */
 693     ch = file->buf_ptr[0];
 694     next_nomacro();
 695     parse_define();
 696
 697     tcc_close();
 698 }
 699
 700 /* undefine a preprocessor symbol */
 701 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 702 {
 703     TokenSym *ts;
 704     Sym *s;
 705     ts = tok_alloc(sym, strlen(sym));
 706     s = define_find(ts->tok);
 707     /* undefine symbol by putting an invalid name */
 708     if (s)
 709         define_undef(s);
 710 }
 711
 712 /* cleanup all static data used during compilation */
 713 static void tcc_cleanup(void)
 714 {
 715     if (NULL == tcc_state)
 716         return;
 717     tccpp_delete(tcc_state);
 718     tcc_state = NULL;
 719     /* free sym_pools */
 720     dynarray_reset(&sym_pools, &nb_sym_pools);
 721     /* reset symbol stack */
 722     sym_free_first = NULL;
 723 }
 724
 725 LIBTCCAPI TCCState *tcc_new(void)
 726 {
 727     TCCState *s;
 728
 729     tcc_cleanup();
 730
 731     s = tcc_mallocz(sizeof(TCCState));
 732     if (!s)
 733         return NULL;
 734     tcc_state = s;
 735     ++nb_states;
 736
 737     s->alacarte_link = 1;
 738     s->nocommon = 1;
 739     s->warn_implicit_function_declaration = 1;
 740
 741 #ifdef CHAR_IS_UNSIGNED
 742     s->char_is_unsigned = 1;
 743 #endif
 744 #ifdef TCC_TARGET_I386
 745     s->seg_size = 32;
 746 #endif
 747     /* enable this if you want symbols with leading underscore on windows: */
 748 #if 0 /* def TCC_TARGET_PE */
 749     s->leading_underscore = 1;
 750 #endif
 751 #ifdef _WIN32
 752     tcc_set_lib_path_w32(s);
 753 #else
 754     tcc_set_lib_path(s, CONFIG_TCCDIR);
 755 #endif
 756     tccelf_new(s);
 757     tccpp_new(s);
 758
 759     /* we add dummy defines for some special macros to speed up tests
 760        and to have working defined() */
 761     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 762     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 763     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 764     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 765     {
 766         /* define __TINYC__ 92X  */
 767         char buffer[32]; int a,b,c;
 768         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 769         sprintf(buffer, "%d", a*10000 + b*100 + c);
 770         tcc_define_symbol(s, "__TINYC__", buffer);
 771     }
 772
 773     /* standard defines */
 774     tcc_define_symbol(s, "__STDC__", NULL);
 775     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 776     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 777
 778     /* target defines */
 779 #if defined(TCC_TARGET_I386)
 780     tcc_define_symbol(s, "__i386__", NULL);
 781     tcc_define_symbol(s, "__i386", NULL);
 782     tcc_define_symbol(s, "i386", NULL);
 783 #elif defined(TCC_TARGET_X86_64)
 784     tcc_define_symbol(s, "__x86_64__", NULL);
 785 #elif defined(TCC_TARGET_ARM)
 786     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 787     tcc_define_symbol(s, "__arm_elf__", NULL);
 788     tcc_define_symbol(s, "__arm_elf", NULL);
 789     tcc_define_symbol(s, "arm_elf", NULL);
 790     tcc_define_symbol(s, "__arm__", NULL);
 791     tcc_define_symbol(s, "__arm", NULL);
 792     tcc_define_symbol(s, "arm", NULL);
 793     tcc_define_symbol(s, "__APCS_32__", NULL);
 794     tcc_define_symbol(s, "__ARMEL__", NULL);
 795 #if defined(TCC_ARM_EABI)
 796     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 797 #endif
 798 #if defined(TCC_ARM_HARDFLOAT)
 799     s->float_abi = ARM_HARD_FLOAT;
 800     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 801 #else
 802     s->float_abi = ARM_SOFTFP_FLOAT;
 803 #endif
 804 #elif defined(TCC_TARGET_ARM64)
 805     tcc_define_symbol(s, "__aarch64__", NULL);
 806 #endif
 807
 808 #ifdef TCC_TARGET_PE
 809     tcc_define_symbol(s, "_WIN32", NULL);
 810 # ifdef TCC_TARGET_X86_64
 811     tcc_define_symbol(s, "_WIN64", NULL);
 812 # endif
 813 #else
 814     tcc_define_symbol(s, "__unix__", NULL);
 815     tcc_define_symbol(s, "__unix", NULL);
 816     tcc_define_symbol(s, "unix", NULL);
 817 # if defined(__linux__)
 818     tcc_define_symbol(s, "__linux__", NULL);
 819     tcc_define_symbol(s, "__linux", NULL);
 820 # endif
 821 # if defined(__FreeBSD__)
 822     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 823     /* No 'Thread Storage Local' on FreeBSD with tcc */
 824     tcc_define_symbol(s, "__NO_TLS", NULL);
 825 # endif
 826 # if defined(__FreeBSD_kernel__)
 827     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 828 # endif
 829 #endif
 830 # if defined(__NetBSD__)
 831     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 832 # endif
 833 # if defined(__OpenBSD__)
 834     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 835 # endif
 836
 837     /* TinyCC & gcc defines */
 838 #if defined(TCC_TARGET_PE) && defined(TCC_TARGET_X86_64)
 839     /* 64bit Windows. */
 840     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 841     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 842     tcc_define_symbol(s, "__LLP64__", NULL);
 843 #elif defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_ARM64)
 844     /* Other 64bit systems. */
 845     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 846     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 847     tcc_define_symbol(s, "__LP64__", NULL);
 848 #else
 849     /* Other 32bit systems. */
 850     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 851     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 852     tcc_define_symbol(s, "__ILP32__", NULL);
 853 #endif
 854
 855 #if defined(TCC_MUSL)
 856     tcc_define_symbol(s, "__builtin_va_list", "void *");
 857 #endif /* TCC_MUSL */
 858
 859 #ifdef TCC_TARGET_PE
 860     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 861     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 862 #else
 863     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 864     /* wint_t is unsigned int by default, but (signed) int on BSDs
 865        and unsigned short on windows.  Other OSes might have still
 866        other conventions, sigh.  */
 867 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 868   || defined(__NetBSD__) || defined(__OpenBSD__)
 869     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 870 #  ifdef __FreeBSD__
 871     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 872        that are unconditionally used in FreeBSDs other system headers :/ */
 873     tcc_define_symbol(s, "__GNUC__", "2");
 874     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 875     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 876 #  endif
 877 # else
 878     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 879     /* glibc defines */
 880     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 881         "name proto __asm__ (#alias)");
 882     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 883         "name proto __asm__ (#alias) __THROW");
 884 # endif
 885     /* Some GCC builtins that are simple to express as macros.  */
 886     tcc_define_symbol(s, "__builtin_extract_return_addr(x)", "x");
 887 #endif /* ndef TCC_TARGET_PE */
 888     return s;
 889 }
 890
 891 LIBTCCAPI void tcc_delete(TCCState *s1)
 892 {
 893     tcc_cleanup();
 894
 895     /* free sections */
 896     tccelf_delete(s1);
 897
 898     /* free library paths */
 899     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 900     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 901
 902     /* free include paths */
 903     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
 904     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 905     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 906     dynarray_reset(&s1->cmd_include_files, &s1->nb_cmd_include_files);
 907
 908     tcc_free(s1->tcc_lib_path);
 909     tcc_free(s1->soname);
 910     tcc_free(s1->rpath);
 911     tcc_free(s1->init_symbol);
 912     tcc_free(s1->fini_symbol);
 913     tcc_free(s1->outfile);
 914     tcc_free(s1->deps_outfile);
 915     dynarray_reset(&s1->files, &s1->nb_files);
 916     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 917     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 918     dynarray_reset(&s1->argv, &s1->argc);
 919
 920 #ifdef TCC_IS_NATIVE
 921     /* free runtime memory */
 922     tcc_run_free(s1);
 923 #endif
 924
 925     tcc_free(s1);
 926     if (0 == --nb_states)
 927         tcc_memcheck();
 928 }
 929
 930 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 931 {
 932     s->output_type = output_type;
 933
 934     /* always elf for objects */
 935     if (output_type == TCC_OUTPUT_OBJ)
 936         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 937
 938     if (s->char_is_unsigned)
 939         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 940
 941     if (!s->nostdinc) {
 942         /* default include paths */
 943         /* -isystem paths have already been handled */
 944         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 945     }
 946
 947 #ifdef CONFIG_TCC_BCHECK
 948     if (s->do_bounds_check) {
 949         /* if bound checking, then add corresponding sections */
 950         tccelf_bounds_new(s);
 951         /* define symbol */
 952         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 953     }
 954 #endif
 955     if (s->do_debug) {
 956         /* add debug sections */
 957         tccelf_stab_new(s);
 958     }
 959
 960     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 961
 962 #ifdef TCC_TARGET_PE
 963 # ifdef _WIN32
 964     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
 965         tcc_add_systemdir(s);
 966 # endif
 967 #else
 968     /* paths for crt objects */
 969     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 970     /* add libc crt1/crti objects */
 971     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
 972         !s->nostdlib) {
 973         if (output_type != TCC_OUTPUT_DLL)
 974             tcc_add_crt(s, "crt1.o");
 975         tcc_add_crt(s, "crti.o");
 976     }
 977 #endif
 978     return 0;
 979 }
 980
 981 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 982 {
 983     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
 984     return 0;
 985 }
 986
 987 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
 988 {
 989     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
 990     return 0;
 991 }
 992
 993 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
 994 {
 995     int ret, filetype;
 996
 997     filetype = flags & 0x0F;
 998     if (filetype == 0) {
 999         /* use a file extension to detect a filetype */
1000         const char *ext = tcc_fileextension(filename);
1001         if (ext[0]) {
1002             ext++;
1003             if (!strcmp(ext, "S"))
1004                 filetype = AFF_TYPE_ASMPP;
1005             else if (!strcmp(ext, "s"))
1006                 filetype = AFF_TYPE_ASM;
1007             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1008                 filetype = AFF_TYPE_C;
1009             else
1010                 filetype = AFF_TYPE_BIN;
1011         } else {
1012             filetype = AFF_TYPE_C;
1013         }
1014     }
1015
1016     /* open the file */
1017     ret = tcc_open(s1, filename);
1018     if (ret < 0) {
1019         if (flags & AFF_PRINT_ERROR)
1020             tcc_error_noabort("file '%s' not found", filename);
1021         return ret;
1022     }
1023
1024     /* update target deps */
1025     dynarray_add(&s1->target_deps, &s1->nb_target_deps,
1026             tcc_strdup(filename));
1027
1028     parse_flags = 0;
1029     /* if .S file, define __ASSEMBLER__ like gcc does */
1030     if (filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP) {
1031         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1032         parse_flags = PARSE_FLAG_ASM_FILE;
1033     }
1034
1035     if (flags & AFF_PREPROCESS) {
1036         ret = tcc_preprocess(s1);
1037     } else if (filetype == AFF_TYPE_C) {
1038         ret = tcc_compile(s1);
1039 #ifdef CONFIG_TCC_ASM
1040     } else if (filetype == AFF_TYPE_ASMPP) {
1041         /* non preprocessed assembler */
1042         ret = tcc_assemble(s1, 1);
1043     } else if (filetype == AFF_TYPE_ASM) {
1044         /* preprocessed assembler */
1045         ret = tcc_assemble(s1, 0);
1046 #endif
1047     } else {
1048         ElfW(Ehdr) ehdr;
1049         int fd, obj_type;
1050
1051         fd = file->fd;
1052         obj_type = tcc_object_type(fd, &ehdr);
1053         lseek(fd, 0, SEEK_SET);
1054
1055         /* do not display line number if error */
1056         file->line_num = 0;
1057
1058 #ifdef TCC_TARGET_MACHO
1059         if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), "dylib"))
1060             obj_type = AFF_BINTYPE_DYN;
1061 #endif
1062
1063         switch (obj_type) {
1064         case AFF_BINTYPE_REL:
1065             ret = tcc_load_object_file(s1, fd, 0);
1066             break;
1067 #ifndef TCC_TARGET_PE
1068         case AFF_BINTYPE_DYN:
1069             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1070                 ret = 0;
1071 #ifdef TCC_IS_NATIVE
1072                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1073                     ret = -1;
1074 #endif
1075             } else {
1076                 ret = tcc_load_dll(s1, fd, filename,
1077                                    (flags & AFF_REFERENCED_DLL) != 0);
1078             }
1079             break;
1080 #endif
1081         case AFF_BINTYPE_AR:
1082             ret = tcc_load_archive(s1, fd);
1083             break;
1084 #ifdef TCC_TARGET_COFF
1085         case AFF_BINTYPE_C67:
1086             ret = tcc_load_coff(s1, fd);
1087             break;
1088 #endif
1089         default:
1090 #ifdef TCC_TARGET_PE
1091             ret = pe_load_file(s1, filename, fd);
1092 #else
1093             /* as GNU ld, consider it is an ld script if not recognized */
1094             ret = tcc_load_ldscript(s1);
1095 #endif
1096             if (ret < 0)
1097                 tcc_error_noabort("unrecognized file type");
1098             break;
1099         }
1100     }
1101     tcc_close();
1102     return ret;
1103 }
1104
1105 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1106 {
1107     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1108         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS | s->filetype);
1109     else
1110         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | s->filetype);
1111 }
1112
1113 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1114 {
1115     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1116     return 0;
1117 }
1118
1119 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1120     const char *filename, int flags, char **paths, int nb_paths)
1121 {
1122     char buf[1024];
1123     int i;
1124
1125     for(i = 0; i < nb_paths; i++) {
1126         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1127         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1128             return 0;
1129     }
1130     return -1;
1131 }
1132
1133 /* find and load a dll. Return non zero if not found */
1134 /* XXX: add '-rpath' option support ? */
1135 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1136 {
1137     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1138         s->library_paths, s->nb_library_paths);
1139 }
1140
1141 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1142 {
1143     if (-1 == tcc_add_library_internal(s, "%s/%s",
1144         filename, 0, s->crt_paths, s->nb_crt_paths))
1145         tcc_error_noabort("file '%s' not found", filename);
1146     return 0;
1147 }
1148
1149 /* the library name is the same as the argument of the '-l' option */
1150 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1151 {
1152 #if defined TCC_TARGET_PE
1153     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1154     const char **pp = s->static_link ? libs + 4 : libs;
1155 #elif defined TCC_TARGET_MACHO
1156     const char *libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
1157     const char **pp = s->static_link ? libs + 1 : libs;
1158 #else
1159     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1160     const char **pp = s->static_link ? libs + 1 : libs;
1161 #endif
1162     while (*pp) {
1163         if (0 == tcc_add_library_internal(s, *pp,
1164             libraryname, 0, s->library_paths, s->nb_library_paths))
1165             return 0;
1166         ++pp;
1167     }
1168     return -1;
1169 }
1170
1171 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1172 {
1173     int ret = tcc_add_library(s, libname);
1174     if (ret < 0)
1175         tcc_error_noabort("library '%s' not found", libname);
1176     return ret;
1177 }
1178
1179 /* handle #pragma comment(lib,) */
1180 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1181 {
1182     int i;
1183     for (i = 0; i < s1->nb_pragma_libs; i++)
1184         tcc_add_library_err(s1, s1->pragma_libs[i]);
1185 }
1186
1187 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1188 {
1189 #ifdef TCC_TARGET_PE
1190     /* On x86_64 'val' might not be reachable with a 32bit offset.
1191        So it is handled here as if it were in a DLL. */
1192     pe_putimport(s, 0, name, (uintptr_t)val);
1193 #else
1194     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1195         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1196         SHN_ABS, name);
1197 #endif
1198     return 0;
1199 }
1200
1201 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1202 {
1203     tcc_free(s->tcc_lib_path);
1204     s->tcc_lib_path = tcc_strdup(path);
1205 }
1206
1207 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1208 #define FD_INVERT 0x0002 /* invert value before storing */
1209
1210 typedef struct FlagDef {
1211     uint16_t offset;
1212     uint16_t flags;
1213     const char *name;
1214 } FlagDef;
1215
1216 static int no_flag(const char **pp)
1217 {
1218     const char *p = *pp;
1219     if (*p != 'n' || *++p != 'o' || *++p != '-')
1220         return 0;
1221     *pp = p + 1;
1222     return 1;
1223 }
1224
1225 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1226 {
1227     int value, ret;
1228     const FlagDef *p;
1229     const char *r;
1230
1231     value = 1;
1232     r = name;
1233     if (no_flag(&r))
1234         value = 0;
1235
1236     for (ret = -1, p = flags; p->name; ++p) {
1237         if (ret) {
1238             if (strcmp(r, p->name))
1239                 continue;
1240         } else {
1241             if (0 == (p->flags & WD_ALL))
1242                 continue;
1243         }
1244         if (p->offset) {
1245             *(int*)((char *)s + p->offset) =
1246                 p->flags & FD_INVERT ? !value : value;
1247             if (ret)
1248                 return 0;
1249         } else {
1250             ret = 0;
1251         }
1252     }
1253     return ret;
1254 }
1255
1256 static int strstart(const char *val, const char **str)
1257 {
1258     const char *p, *q;
1259     p = *str;
1260     q = val;
1261     while (*q) {
1262         if (*p != *q)
1263             return 0;
1264         p++;
1265         q++;
1266     }
1267     *str = p;
1268     return 1;
1269 }
1270
1271 /* Like strstart, but automatically takes into account that ld options can
1272  *
1273  * - start with double or single dash (e.g. '--soname' or '-soname')
1274  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1275  *   or '-Wl,-soname=x.so')
1276  *
1277  * you provide `val` always in 'option[=]' form (no leading -)
1278  */
1279 static int link_option(const char *str, const char *val, const char **ptr)
1280 {
1281     const char *p, *q;
1282     int ret;
1283
1284     /* there should be 1 or 2 dashes */
1285     if (*str++ != '-')
1286         return 0;
1287     if (*str == '-')
1288         str++;
1289
1290     /* then str & val should match (potentially up to '=') */
1291     p = str;
1292     q = val;
1293
1294     ret = 1;
1295     if (q[0] == '?') {
1296         ++q;
1297         if (no_flag(&p))
1298             ret = -1;
1299     }
1300
1301     while (*q != '\0' && *q != '=') {
1302         if (*p != *q)
1303             return 0;
1304         p++;
1305         q++;
1306     }
1307
1308     /* '=' near eos means ',' or '=' is ok */
1309     if (*q == '=') {
1310         if (*p == 0)
1311             *ptr = p;
1312         if (*p != ',' && *p != '=')
1313             return 0;
1314         p++;
1315     } else if (*p) {
1316         return 0;
1317     }
1318     *ptr = p;
1319     return ret;
1320 }
1321
1322 static const char *skip_linker_arg(const char **str)
1323 {
1324     const char *s1 = *str;
1325     const char *s2 = strchr(s1, ',');
1326     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1327     return s2;
1328 }
1329
1330 static void copy_linker_arg(char **pp, const char *s, int sep)
1331 {
1332     const char *q = s;
1333     char *p = *pp;
1334     int l = 0;
1335     if (p && sep)
1336         p[l = strlen(p)] = sep, ++l;
1337     skip_linker_arg(&q);
1338     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1339 }
1340
1341 /* set linker options */
1342 static int tcc_set_linker(TCCState *s, const char *option)
1343 {
1344     while (*option) {
1345
1346         const char *p = NULL;
1347         char *end = NULL;
1348         int ignoring = 0;
1349         int ret;
1350
1351         if (link_option(option, "Bsymbolic", &p)) {
1352             s->symbolic = 1;
1353         } else if (link_option(option, "nostdlib", &p)) {
1354             s->nostdlib = 1;
1355         } else if (link_option(option, "fini=", &p)) {
1356             copy_linker_arg(&s->fini_symbol, p, 0);
1357             ignoring = 1;
1358         } else if (link_option(option, "image-base=", &p)
1359                 || link_option(option, "Ttext=", &p)) {
1360             s->text_addr = strtoull(p, &end, 16);
1361             s->has_text_addr = 1;
1362         } else if (link_option(option, "init=", &p)) {
1363             copy_linker_arg(&s->init_symbol, p, 0);
1364             ignoring = 1;
1365         } else if (link_option(option, "oformat=", &p)) {
1366 #if defined(TCC_TARGET_PE)
1367             if (strstart("pe-", &p)) {
1368 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1369             if (strstart("elf64-", &p)) {
1370 #else
1371             if (strstart("elf32-", &p)) {
1372 #endif
1373                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1374             } else if (!strcmp(p, "binary")) {
1375                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1376 #ifdef TCC_TARGET_COFF
1377             } else if (!strcmp(p, "coff")) {
1378                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1379 #endif
1380             } else
1381                 goto err;
1382
1383         } else if (link_option(option, "as-needed", &p)) {
1384             ignoring = 1;
1385         } else if (link_option(option, "O", &p)) {
1386             ignoring = 1;
1387         } else if (link_option(option, "export-all-symbols", &p)) {
1388             s->rdynamic = 1;
1389         } else if (link_option(option, "rpath=", &p)) {
1390             copy_linker_arg(&s->rpath, p, ':');
1391         } else if (link_option(option, "enable-new-dtags", &p)) {
1392             s->enable_new_dtags = 1;
1393         } else if (link_option(option, "section-alignment=", &p)) {
1394             s->section_align = strtoul(p, &end, 16);
1395         } else if (link_option(option, "soname=", &p)) {
1396             copy_linker_arg(&s->soname, p, 0);
1397 #ifdef TCC_TARGET_PE
1398         } else if (link_option(option, "large-address-aware", &p)) {
1399             s->pe_characteristics |= 0x20;
1400         } else if (link_option(option, "file-alignment=", &p)) {
1401             s->pe_file_align = strtoul(p, &end, 16);
1402         } else if (link_option(option, "stack=", &p)) {
1403             s->pe_stack_size = strtoul(p, &end, 10);
1404         } else if (link_option(option, "subsystem=", &p)) {
1405 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1406             if (!strcmp(p, "native")) {
1407                 s->pe_subsystem = 1;
1408             } else if (!strcmp(p, "console")) {
1409                 s->pe_subsystem = 3;
1410             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1411                 s->pe_subsystem = 2;
1412             } else if (!strcmp(p, "posix")) {
1413                 s->pe_subsystem = 7;
1414             } else if (!strcmp(p, "efiapp")) {
1415                 s->pe_subsystem = 10;
1416             } else if (!strcmp(p, "efiboot")) {
1417                 s->pe_subsystem = 11;
1418             } else if (!strcmp(p, "efiruntime")) {
1419                 s->pe_subsystem = 12;
1420             } else if (!strcmp(p, "efirom")) {
1421                 s->pe_subsystem = 13;
1422 #elif defined(TCC_TARGET_ARM)
1423             if (!strcmp(p, "wince")) {
1424                 s->pe_subsystem = 9;
1425 #endif
1426             } else
1427                 goto err;
1428 #endif
1429         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1430             s->alacarte_link = ret < 0;
1431         } else if (p) {
1432             return 0;
1433         } else {
1434     err:
1435             tcc_error("unsupported linker option '%s'", option);
1436         }
1437
1438         if (ignoring && s->warn_unsupported)
1439             tcc_warning("unsupported linker option '%s'", option);
1440
1441         option = skip_linker_arg(&p);
1442     }
1443     return 1;
1444 }
1445
1446 typedef struct TCCOption {
1447     const char *name;
1448     uint16_t index;
1449     uint16_t flags;
1450 } TCCOption;
1451
1452 enum {
1453     TCC_OPTION_HELP,
1454     TCC_OPTION_HELP2,
1455     TCC_OPTION_v,
1456     TCC_OPTION_I,
1457     TCC_OPTION_D,
1458     TCC_OPTION_U,
1459     TCC_OPTION_P,
1460     TCC_OPTION_L,
1461     TCC_OPTION_B,
1462     TCC_OPTION_l,
1463     TCC_OPTION_bench,
1464     TCC_OPTION_bt,
1465     TCC_OPTION_b,
1466     TCC_OPTION_g,
1467     TCC_OPTION_c,
1468     TCC_OPTION_dumpversion,
1469     TCC_OPTION_d,
1470     TCC_OPTION_static,
1471     TCC_OPTION_std,
1472     TCC_OPTION_shared,
1473     TCC_OPTION_soname,
1474     TCC_OPTION_o,
1475     TCC_OPTION_r,
1476     TCC_OPTION_s,
1477     TCC_OPTION_traditional,
1478     TCC_OPTION_Wl,
1479     TCC_OPTION_Wp,
1480     TCC_OPTION_W,
1481     TCC_OPTION_O,
1482     TCC_OPTION_mfloat_abi,
1483     TCC_OPTION_m,
1484     TCC_OPTION_f,
1485     TCC_OPTION_isystem,
1486     TCC_OPTION_iwithprefix,
1487     TCC_OPTION_include,
1488     TCC_OPTION_nostdinc,
1489     TCC_OPTION_nostdlib,
1490     TCC_OPTION_print_search_dirs,
1491     TCC_OPTION_rdynamic,
1492     TCC_OPTION_param,
1493     TCC_OPTION_pedantic,
1494     TCC_OPTION_pthread,
1495     TCC_OPTION_run,
1496     TCC_OPTION_w,
1497     TCC_OPTION_pipe,
1498     TCC_OPTION_E,
1499     TCC_OPTION_MD,
1500     TCC_OPTION_MF,
1501     TCC_OPTION_x,
1502     TCC_OPTION_ar,
1503     TCC_OPTION_impdef
1504 };
1505
1506 #define TCC_OPTION_HAS_ARG 0x0001
1507 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1508
1509 static const TCCOption tcc_options[] = {
1510     { "h", TCC_OPTION_HELP, 0 },
1511     { "-help", TCC_OPTION_HELP, 0 },
1512     { "?", TCC_OPTION_HELP, 0 },
1513     { "hh", TCC_OPTION_HELP2, 0 },
1514     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1515     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1516     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1517     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1518     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1519     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1520     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1521     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1522     { "bench", TCC_OPTION_bench, 0 },
1523 #ifdef CONFIG_TCC_BACKTRACE
1524     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1525 #endif
1526 #ifdef CONFIG_TCC_BCHECK
1527     { "b", TCC_OPTION_b, 0 },
1528 #endif
1529     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1530     { "c", TCC_OPTION_c, 0 },
1531     { "dumpversion", TCC_OPTION_dumpversion, 0},
1532     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1533     { "static", TCC_OPTION_static, 0 },
1534     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1535     { "shared", TCC_OPTION_shared, 0 },
1536     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1537     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1538     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1539     { "pedantic", TCC_OPTION_pedantic, 0},
1540     { "pthread", TCC_OPTION_pthread, 0},
1541     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1542     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1543     { "r", TCC_OPTION_r, 0 },
1544     { "s", TCC_OPTION_s, 0 },
1545     { "traditional", TCC_OPTION_traditional, 0 },
1546     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1547     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1548     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1549     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1550 #ifdef TCC_TARGET_ARM
1551     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1552 #endif
1553     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1554     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1555     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1556     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
1557     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1558     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1559     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1560     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1561     { "w", TCC_OPTION_w, 0 },
1562     { "pipe", TCC_OPTION_pipe, 0},
1563     { "E", TCC_OPTION_E, 0},
1564     { "MD", TCC_OPTION_MD, 0},
1565     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1566     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1567     { "ar", TCC_OPTION_ar, 0},
1568 #ifdef TCC_TARGET_PE
1569     { "impdef", TCC_OPTION_impdef, 0},
1570 #endif
1571     { NULL, 0, 0 },
1572 };
1573
1574 static const FlagDef options_W[] = {
1575     { 0, 0, "all" },
1576     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1577     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1578     { offsetof(TCCState, warn_error), 0, "error" },
1579     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1580       "implicit-function-declaration" },
1581     { 0, 0, NULL }
1582 };
1583
1584 static const FlagDef options_f[] = {
1585     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1586     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1587     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1588     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1589     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1590     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1591     { 0, 0, NULL }
1592 };
1593
1594 static const FlagDef options_m[] = {
1595     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1596 #ifdef TCC_TARGET_X86_64
1597     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1598 #endif
1599     { 0, 0, NULL }
1600 };
1601
1602 static void parse_option_D(TCCState *s1, const char *optarg)
1603 {
1604     char *sym = tcc_strdup(optarg);
1605     char *value = strchr(sym, '=');
1606     if (value)
1607         *value++ = '\0';
1608     tcc_define_symbol(s1, sym, value);
1609     tcc_free(sym);
1610 }
1611
1612 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1613 {
1614     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1615     f->type = filetype;
1616     f->alacarte = s->alacarte_link;
1617     strcpy(f->name, filename);
1618     dynarray_add(&s->files, &s->nb_files, f);
1619 }
1620
1621 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1622 {
1623     int ret = 0, q, c;
1624     CString str;
1625     for(;;) {
1626         while (c = (unsigned char)*r, c && c <= ' ')
1627             ++r;
1628         if (c == 0)
1629             break;
1630         q = 0;
1631         cstr_new(&str);
1632         while (c = (unsigned char)*r, c) {
1633             ++r;
1634             if (c == '\\' && (*r == '"' || *r == '\\')) {
1635                 c = *r++;
1636             } else if (c == '"') {
1637                 q = !q;
1638                 continue;
1639             } else if (q == 0 && c <= ' ') {
1640                 break;
1641             }
1642             cstr_ccat(&str, c);
1643         }
1644         cstr_ccat(&str, 0);
1645         //printf("<%s>\n", str.data), fflush(stdout);
1646         dynarray_add(argv, argc, tcc_strdup(str.data));
1647         cstr_free(&str);
1648         ++ret;
1649     }
1650     return ret;
1651 }
1652
1653 /* read list file */
1654 static void args_parser_listfile(TCCState *s,
1655     const char *filename, int optind, int *pargc, char ***pargv)
1656 {
1657     int fd, i;
1658     size_t len;
1659     char *p;
1660     int argc = 0;
1661     char **argv = NULL;
1662
1663     fd = open(filename, O_RDONLY | O_BINARY);
1664     if (fd < 0)
1665         tcc_error("listfile '%s' not found", filename);
1666
1667     len = lseek(fd, 0, SEEK_END);
1668     p = tcc_malloc(len + 1), p[len] = 0;
1669     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1670
1671     for (i = 0; i < *pargc; ++i)
1672         if (i == optind)
1673             args_parser_make_argv(p, &argc, &argv);
1674         else
1675             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1676
1677     tcc_free(p);
1678     dynarray_reset(&s->argv, &s->argc);
1679     *pargc = s->argc = argc, *pargv = s->argv = argv;
1680 }
1681
1682 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1683 {
1684     const TCCOption *popt;
1685     const char *optarg, *r;
1686     const char *run = NULL;
1687     int last_o = -1;
1688     int x;
1689     CString linker_arg; /* collect -Wl options */
1690     char buf[1024];
1691     int tool = 0, arg_start = 0, noaction = optind;
1692     char **argv = *pargv;
1693     int argc = *pargc;
1694
1695     cstr_new(&linker_arg);
1696
1697     while (optind < argc) {
1698         r = argv[optind];
1699         if (r[0] == '@' && r[1] != '\0') {
1700             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1701             continue;
1702         }
1703         optind++;
1704         if (tool) {
1705             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1706                 ++s->verbose;
1707             continue;
1708         }
1709 reparse:
1710         if (r[0] != '-' || r[1] == '\0') {
1711             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1712                 args_parser_add_file(s, r, s->filetype);
1713             if (run) {
1714                 tcc_set_options(s, run);
1715                 arg_start = optind - 1;
1716                 break;
1717             }
1718             continue;
1719         }
1720
1721         /* find option in table */
1722         for(popt = tcc_options; ; ++popt) {
1723             const char *p1 = popt->name;
1724             const char *r1 = r + 1;
1725             if (p1 == NULL)
1726                 tcc_error("invalid option -- '%s'", r);
1727             if (!strstart(p1, &r1))
1728                 continue;
1729             optarg = r1;
1730             if (popt->flags & TCC_OPTION_HAS_ARG) {
1731                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1732                     if (optind >= argc)
1733                 arg_err:
1734                         tcc_error("argument to '%s' is missing", r);
1735                     optarg = argv[optind++];
1736                 }
1737             } else if (*r1 != '\0')
1738                 continue;
1739             break;
1740         }
1741
1742         switch(popt->index) {
1743         case TCC_OPTION_HELP:
1744             return OPT_HELP;
1745         case TCC_OPTION_HELP2:
1746             return OPT_HELP2;
1747         case TCC_OPTION_I:
1748             tcc_add_include_path(s, optarg);
1749             break;
1750         case TCC_OPTION_D:
1751             parse_option_D(s, optarg);
1752             break;
1753         case TCC_OPTION_U:
1754             tcc_undefine_symbol(s, optarg);
1755             break;
1756         case TCC_OPTION_L:
1757             tcc_add_library_path(s, optarg);
1758             break;
1759         case TCC_OPTION_B:
1760             /* set tcc utilities path (mainly for tcc development) */
1761             tcc_set_lib_path(s, optarg);
1762             break;
1763         case TCC_OPTION_l:
1764             args_parser_add_file(s, optarg, AFF_TYPE_LIB);
1765             s->nb_libraries++;
1766             break;
1767         case TCC_OPTION_pthread:
1768             parse_option_D(s, "_REENTRANT");
1769             s->option_pthread = 1;
1770             break;
1771         case TCC_OPTION_bench:
1772             s->do_bench = 1;
1773             break;
1774 #ifdef CONFIG_TCC_BACKTRACE
1775         case TCC_OPTION_bt:
1776             tcc_set_num_callers(atoi(optarg));
1777             break;
1778 #endif
1779 #ifdef CONFIG_TCC_BCHECK
1780         case TCC_OPTION_b:
1781             s->do_bounds_check = 1;
1782             s->do_debug = 1;
1783             break;
1784 #endif
1785         case TCC_OPTION_g:
1786             s->do_debug = 1;
1787             break;
1788         case TCC_OPTION_c:
1789             x = TCC_OUTPUT_OBJ;
1790         set_output_type:
1791             if (s->output_type)
1792                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1793             s->output_type = x;
1794             break;
1795         case TCC_OPTION_d:
1796             if (*optarg == 'D')
1797                 s->dflag = 3;
1798             else if (*optarg == 'M')
1799                 s->dflag = 7;
1800             else
1801                 goto unsupported_option;
1802             break;
1803         case TCC_OPTION_static:
1804             s->static_link = 1;
1805             break;
1806         case TCC_OPTION_std:
1807             /* silently ignore, a current purpose:
1808                allow to use a tcc as a reference compiler for "make test" */
1809             break;
1810         case TCC_OPTION_shared:
1811             x = TCC_OUTPUT_DLL;
1812             goto set_output_type;
1813         case TCC_OPTION_soname:
1814             s->soname = tcc_strdup(optarg);
1815             break;
1816         case TCC_OPTION_o:
1817             if (s->outfile) {
1818                 tcc_warning("multiple -o option");
1819                 tcc_free(s->outfile);
1820             }
1821             s->outfile = tcc_strdup(optarg);
1822             break;
1823         case TCC_OPTION_r:
1824             /* generate a .o merging several output files */
1825             s->option_r = 1;
1826             x = TCC_OUTPUT_OBJ;
1827             goto set_output_type;
1828         case TCC_OPTION_isystem:
1829             tcc_add_sysinclude_path(s, optarg);
1830             break;
1831         case TCC_OPTION_iwithprefix:
1832             snprintf(buf, sizeof buf, "{B}/%s", optarg);
1833             tcc_add_sysinclude_path(s, buf);
1834             break;
1835         case TCC_OPTION_include:
1836             dynarray_add(&s->cmd_include_files,
1837                          &s->nb_cmd_include_files, tcc_strdup(optarg));
1838             break;
1839         case TCC_OPTION_nostdinc:
1840             s->nostdinc = 1;
1841             break;
1842         case TCC_OPTION_nostdlib:
1843             s->nostdlib = 1;
1844             break;
1845         case TCC_OPTION_run:
1846 #ifndef TCC_IS_NATIVE
1847             tcc_error("-run is not available in a cross compiler");
1848 #endif
1849             run = optarg;
1850             x = TCC_OUTPUT_MEMORY;
1851             goto set_output_type;
1852         case TCC_OPTION_v:
1853             do ++s->verbose; while (*optarg++ == 'v');
1854             ++noaction;
1855             break;
1856         case TCC_OPTION_f:
1857             if (set_flag(s, options_f, optarg) < 0)
1858                 goto unsupported_option;
1859             break;
1860 #ifdef TCC_TARGET_ARM
1861         case TCC_OPTION_mfloat_abi:
1862             /* tcc doesn't support soft float yet */
1863             if (!strcmp(optarg, "softfp")) {
1864                 s->float_abi = ARM_SOFTFP_FLOAT;
1865                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1866             } else if (!strcmp(optarg, "hard"))
1867                 s->float_abi = ARM_HARD_FLOAT;
1868             else
1869                 tcc_error("unsupported float abi '%s'", optarg);
1870             break;
1871 #endif
1872         case TCC_OPTION_m:
1873             if (set_flag(s, options_m, optarg) < 0) {
1874                 if (x = atoi(optarg), x != 32 && x != 64)
1875                     goto unsupported_option;
1876                 if (PTR_SIZE != x/8)
1877                     return x;
1878                 ++noaction;
1879             }
1880             break;
1881         case TCC_OPTION_W:
1882             if (set_flag(s, options_W, optarg) < 0)
1883                 goto unsupported_option;
1884             break;
1885         case TCC_OPTION_w:
1886             s->warn_none = 1;
1887             break;
1888         case TCC_OPTION_rdynamic:
1889             s->rdynamic = 1;
1890             break;
1891         case TCC_OPTION_Wl:
1892             if (linker_arg.size)
1893                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1894             cstr_cat(&linker_arg, optarg, 0);
1895             if (tcc_set_linker(s, linker_arg.data))
1896                 cstr_free(&linker_arg);
1897             break;
1898         case TCC_OPTION_Wp:
1899             r = optarg;
1900             goto reparse;
1901         case TCC_OPTION_E:
1902             x = TCC_OUTPUT_PREPROCESS;
1903             goto set_output_type;
1904         case TCC_OPTION_P:
1905             s->Pflag = atoi(optarg) + 1;
1906             break;
1907         case TCC_OPTION_MD:
1908             s->gen_deps = 1;
1909             break;
1910         case TCC_OPTION_MF:
1911             s->deps_outfile = tcc_strdup(optarg);
1912             break;
1913         case TCC_OPTION_dumpversion:
1914             printf ("%s\n", TCC_VERSION);
1915             exit(0);
1916             break;
1917         case TCC_OPTION_x:
1918             if (*optarg == 'c')
1919                 s->filetype = AFF_TYPE_C;
1920             else if (*optarg == 'a')
1921                 s->filetype = AFF_TYPE_ASMPP;
1922             else if (*optarg == 'n')
1923                 s->filetype = AFF_TYPE_NONE;
1924             else
1925                 tcc_warning("unsupported language '%s'", optarg);
1926             break;
1927         case TCC_OPTION_O:
1928             last_o = atoi(optarg);
1929             break;
1930         case TCC_OPTION_print_search_dirs:
1931             x = OPT_PRINT_DIRS;
1932             goto extra_action;
1933         case TCC_OPTION_impdef:
1934             x = OPT_IMPDEF;
1935             goto extra_action;
1936         case TCC_OPTION_ar:
1937             x = OPT_AR;
1938         extra_action:
1939             arg_start = optind - 1;
1940             if (arg_start != noaction)
1941                 tcc_error("cannot parse %s here", r);
1942             tool = x;
1943             break;
1944         case TCC_OPTION_traditional:
1945         case TCC_OPTION_pedantic:
1946         case TCC_OPTION_pipe:
1947         case TCC_OPTION_s:
1948             /* ignored */
1949             break;
1950         default:
1951 unsupported_option:
1952             if (s->warn_unsupported)
1953                 tcc_warning("unsupported option '%s'", r);
1954             break;
1955         }
1956     }
1957     if (last_o > 0)
1958         tcc_define_symbol(s, "__OPTIMIZE__", NULL);
1959     if (linker_arg.size) {
1960         r = linker_arg.data;
1961         goto arg_err;
1962     }
1963     *pargc = argc - arg_start;
1964     *pargv = argv + arg_start;
1965     if (tool)
1966         return tool;
1967     if (optind != noaction)
1968         return 0;
1969     if (s->verbose == 2)
1970         return OPT_PRINT_DIRS;
1971     if (s->verbose)
1972         return OPT_V;
1973     return OPT_HELP;
1974 }
1975
1976 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
1977 {
1978     char **argv = NULL;
1979     int argc = 0;
1980     args_parser_make_argv(r, &argc, &argv);
1981     tcc_parse_args(s, &argc, &argv, 0);
1982     dynarray_reset(&argv, &argc);
1983 }
1984
1985 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time)
1986 {
1987     if (total_time < 1)
1988         total_time = 1;
1989     if (total_bytes < 1)
1990         total_bytes = 1;
1991     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
1992                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
1993            tok_ident - TOK_IDENT, total_lines, total_bytes,
1994            (double)total_time/1000,
1995            (unsigned)total_lines*1000/total_time,
1996            (double)total_bytes/1000/total_time);
1997 #ifdef MEM_DEBUG
1998     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
1999 #endif
2000 }