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 "tccdbg.c"
  25 #include "tccasm.c"
  26 #include "tccelf.c"
  27 #include "tccrun.c"
  28 #ifdef TCC_TARGET_I386
  29 #include "i386-gen.c"
  30 #include "i386-link.c"
  31 #include "i386-asm.c"
  32 #elif defined(TCC_TARGET_ARM)
  33 #include "arm-gen.c"
  34 #include "arm-link.c"
  35 #include "arm-asm.c"
  36 #elif defined(TCC_TARGET_ARM64)
  37 #include "arm64-gen.c"
  38 #include "arm64-link.c"
  39 #include "arm-asm.c"
  40 #elif defined(TCC_TARGET_C67)
  41 #include "c67-gen.c"
  42 #include "c67-link.c"
  43 #include "tcccoff.c"
  44 #elif defined(TCC_TARGET_X86_64)
  45 #include "x86_64-gen.c"
  46 #include "x86_64-link.c"
  47 #include "i386-asm.c"
  48 #elif defined(TCC_TARGET_RISCV64)
  49 #include "riscv64-gen.c"
  50 #include "riscv64-link.c"
  51 #include "riscv64-asm.c"
  52 #else
  53 #error unknown target
  54 #endif
  55 #ifdef TCC_TARGET_PE
  56 #include "tccpe.c"
  57 #endif
  58 #ifdef TCC_TARGET_MACHO
  59 #include "tccmacho.c"
  60 #endif
  61 #endif /* ONE_SOURCE */
  62
  63 #define TCC_SEM_IMPL 1
  64 #include "tcc.h"
  65
  66 /********************************************************/
  67 /* global variables */
  68
  69 /* XXX: get rid of this ASAP (or maybe not) */
  70 ST_DATA struct TCCState *tcc_state;
  71 TCC_SEM(static tcc_compile_sem);
  72 /* an array of pointers to memory to be free'd after errors */
  73 ST_DATA void** stk_data;
  74 ST_DATA int nb_stk_data;
  75
  76 /********************************************************/
  77 #ifdef _WIN32
  78 ST_FUNC char *normalize_slashes(char *path)
  79 {
  80     char *p;
  81     for (p = path; *p; ++p)
  82         if (*p == '\\')
  83             *p = '/';
  84     return path;
  85 }
  86
  87 #if defined LIBTCC_AS_DLL && !defined CONFIG_TCCDIR
  88 static HMODULE tcc_module;
  89 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
  90 {
  91     if (DLL_PROCESS_ATTACH == dwReason)
  92         tcc_module = hDll;
  93     return TRUE;
  94 }
  95 #else
  96 #define tcc_module NULL /* NULL means executable itself */
  97 #endif
  98
  99 #ifndef CONFIG_TCCDIR
 100 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 101 static inline char *config_tccdir_w32(char *path)
 102 {
 103     char *p;
 104     GetModuleFileName(tcc_module, path, MAX_PATH);
 105     p = tcc_basename(normalize_slashes(strlwr(path)));
 106     if (p > path)
 107         --p;
 108     *p = 0;
 109     return path;
 110 }
 111 #define CONFIG_TCCDIR config_tccdir_w32(alloca(MAX_PATH))
 112 #endif
 113
 114 #ifdef TCC_IS_NATIVE
 115 static void tcc_add_systemdir(TCCState *s)
 116 {
 117     char buf[1000];
 118     GetSystemDirectory(buf, sizeof buf);
 119     tcc_add_library_path(s, normalize_slashes(buf));
 120 }
 121 #endif
 122 #endif
 123
 124 /********************************************************/
 125
 126 PUB_FUNC void tcc_enter_state(TCCState *s1)
 127 {
 128     if (s1->error_set_jmp_enabled)
 129         return;
 130     WAIT_SEM(&tcc_compile_sem);
 131     tcc_state = s1;
 132 }
 133
 134 PUB_FUNC void tcc_exit_state(TCCState *s1)
 135 {
 136     if (s1->error_set_jmp_enabled)
 137         return;
 138     tcc_state = NULL;
 139     POST_SEM(&tcc_compile_sem);
 140 }
 141
 142 /********************************************************/
 143 /* copy a string and truncate it. */
 144 ST_FUNC char *pstrcpy(char *buf, size_t buf_size, const char *s)
 145 {
 146     char *q, *q_end;
 147     int c;
 148
 149     if (buf_size > 0) {
 150         q = buf;
 151         q_end = buf + buf_size - 1;
 152         while (q < q_end) {
 153             c = *s++;
 154             if (c == '\0')
 155                 break;
 156             *q++ = c;
 157         }
 158         *q = '\0';
 159     }
 160     return buf;
 161 }
 162
 163 /* strcat and truncate. */
 164 ST_FUNC char *pstrcat(char *buf, size_t buf_size, const char *s)
 165 {
 166     size_t len;
 167     len = strlen(buf);
 168     if (len < buf_size)
 169         pstrcpy(buf + len, buf_size - len, s);
 170     return buf;
 171 }
 172
 173 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 174 {
 175     memcpy(out, in, num);
 176     out[num] = '\0';
 177     return out;
 178 }
 179
 180 /* extract the basename of a file */
 181 PUB_FUNC char *tcc_basename(const char *name)
 182 {
 183     char *p = strchr(name, 0);
 184     while (p > name && !IS_DIRSEP(p[-1]))
 185         --p;
 186     return p;
 187 }
 188
 189 /* extract extension part of a file
 190  *
 191  * (if no extension, return pointer to end-of-string)
 192  */
 193 PUB_FUNC char *tcc_fileextension (const char *name)
 194 {
 195     char *b = tcc_basename(name);
 196     char *e = strrchr(b, '.');
 197     return e ? e : strchr(b, 0);
 198 }
 199
 200 ST_FUNC char *tcc_load_text(int fd)
 201 {
 202     int len = lseek(fd, 0, SEEK_END);
 203     char *buf = load_data(fd, 0, len + 1);
 204     buf[len] = 0;
 205     return buf;
 206 }
 207
 208 /********************************************************/
 209 /* memory management */
 210
 211 /* we'll need the actual versions for a minute */
 212 #undef free
 213 #undef realloc
 214
 215 static void *default_reallocator(void *ptr, unsigned long size)
 216 {
 217     void *ptr1;
 218     if (size == 0) {
 219         free(ptr);
 220         ptr1 = NULL;
 221     }
 222     else {
 223         ptr1 = realloc(ptr, size);
 224         if (!ptr1) {
 225             fprintf(stderr, "memory full\n");
 226             exit (1);
 227         }
 228     }
 229     return ptr1;
 230 }
 231
 232 ST_FUNC void libc_free(void *ptr)
 233 {
 234     free(ptr);
 235 }
 236
 237 #define free(p) use_tcc_free(p)
 238 #define realloc(p, s) use_tcc_realloc(p, s)
 239
 240 /* global so that every tcc_alloc()/tcc_free() call doesn't need to be changed */
 241 static void *(*reallocator)(void*, unsigned long) = default_reallocator;
 242
 243 LIBTCCAPI void tcc_set_realloc(TCCReallocFunc *realloc)
 244 {
 245     reallocator = realloc ? realloc : default_reallocator;
 246 }
 247
 248 /* in case MEM_DEBUG is #defined */
 249 #undef tcc_free
 250 #undef tcc_malloc
 251 #undef tcc_realloc
 252 #undef tcc_mallocz
 253 #undef tcc_strdup
 254
 255 PUB_FUNC void tcc_free(void *ptr)
 256 {
 257     reallocator(ptr, 0);
 258 }
 259
 260 PUB_FUNC void *tcc_malloc(unsigned long size)
 261 {
 262     return reallocator(0, size);
 263 }
 264
 265 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 266 {
 267     return reallocator(ptr, size);
 268 }
 269
 270 PUB_FUNC void *tcc_mallocz(unsigned long size)
 271 {
 272     void *ptr;
 273     ptr = tcc_malloc(size);
 274     if (size)
 275         memset(ptr, 0, size);
 276     return ptr;
 277 }
 278
 279 PUB_FUNC char *tcc_strdup(const char *str)
 280 {
 281     char *ptr;
 282     ptr = tcc_malloc(strlen(str) + 1);
 283     strcpy(ptr, str);
 284     return ptr;
 285 }
 286
 287 #ifdef MEM_DEBUG
 288
 289 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 290 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 291 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 292 #define MEM_DEBUG_FILE_LEN 40
 293 #define MEM_DEBUG_CHECK3(header) \
 294     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 295 #define MEM_USER_PTR(header) \
 296     ((char *)header + offsetof(mem_debug_header_t, magic3))
 297 #define MEM_HEADER_PTR(ptr) \
 298     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 299
 300 struct mem_debug_header {
 301     unsigned magic1;
 302     unsigned size;
 303     struct mem_debug_header *prev;
 304     struct mem_debug_header *next;
 305     int line_num;
 306     char file_name[MEM_DEBUG_FILE_LEN + 1];
 307     unsigned magic2;
 308     ALIGNED(16) unsigned char magic3[4];
 309 };
 310
 311 typedef struct mem_debug_header mem_debug_header_t;
 312
 313 TCC_SEM(static mem_sem);
 314 static mem_debug_header_t *mem_debug_chain;
 315 static unsigned mem_cur_size;
 316 static unsigned mem_max_size;
 317 static int nb_states;
 318
 319 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 320 {
 321     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 322     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 323         header->magic2 != MEM_DEBUG_MAGIC2 ||
 324         read32le(MEM_DEBUG_CHECK3(header)) != MEM_DEBUG_MAGIC3 ||
 325         header->size == (unsigned)-1) {
 326         fprintf(stderr, "%s check failed\n", msg);
 327         if (header->magic1 == MEM_DEBUG_MAGIC1)
 328             fprintf(stderr, "%s:%u: block allocated here.\n",
 329                 header->file_name, header->line_num);
 330         exit(1);
 331     }
 332     return header;
 333 }
 334
 335 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 336 {
 337     int ofs;
 338     mem_debug_header_t *header;
 339
 340     header = tcc_malloc(sizeof(mem_debug_header_t) + size);
 341     header->magic1 = MEM_DEBUG_MAGIC1;
 342     header->magic2 = MEM_DEBUG_MAGIC2;
 343     header->size = size;
 344     write32le(MEM_DEBUG_CHECK3(header), MEM_DEBUG_MAGIC3);
 345     header->line_num = line;
 346     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 347     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 348     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 349
 350     WAIT_SEM(&mem_sem);
 351     header->next = mem_debug_chain;
 352     header->prev = NULL;
 353     if (header->next)
 354         header->next->prev = header;
 355     mem_debug_chain = header;
 356     mem_cur_size += size;
 357     if (mem_cur_size > mem_max_size)
 358         mem_max_size = mem_cur_size;
 359     POST_SEM(&mem_sem);
 360
 361     return MEM_USER_PTR(header);
 362 }
 363
 364 PUB_FUNC void tcc_free_debug(void *ptr)
 365 {
 366     mem_debug_header_t *header;
 367     if (!ptr)
 368         return;
 369     header = malloc_check(ptr, "tcc_free");
 370
 371     WAIT_SEM(&mem_sem);
 372     mem_cur_size -= header->size;
 373     header->size = (unsigned)-1;
 374     if (header->next)
 375         header->next->prev = header->prev;
 376     if (header->prev)
 377         header->prev->next = header->next;
 378     if (header == mem_debug_chain)
 379         mem_debug_chain = header->next;
 380     POST_SEM(&mem_sem);
 381     tcc_free(header);
 382 }
 383
 384 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 385 {
 386     void *ptr;
 387     ptr = tcc_malloc_debug(size,file,line);
 388     memset(ptr, 0, size);
 389     return ptr;
 390 }
 391
 392 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 393 {
 394     mem_debug_header_t *header;
 395     int mem_debug_chain_update = 0;
 396     if (!ptr)
 397         return tcc_malloc_debug(size, file, line);
 398     header = malloc_check(ptr, "tcc_realloc");
 399
 400     WAIT_SEM(&mem_sem);
 401     mem_cur_size -= header->size;
 402     mem_debug_chain_update = (header == mem_debug_chain);
 403     header = tcc_realloc(header, sizeof(mem_debug_header_t) + size);
 404     header->size = size;
 405     write32le(MEM_DEBUG_CHECK3(header), MEM_DEBUG_MAGIC3);
 406     if (header->next)
 407         header->next->prev = header;
 408     if (header->prev)
 409         header->prev->next = header;
 410     if (mem_debug_chain_update)
 411         mem_debug_chain = header;
 412     mem_cur_size += size;
 413     if (mem_cur_size > mem_max_size)
 414         mem_max_size = mem_cur_size;
 415     POST_SEM(&mem_sem);
 416
 417     return MEM_USER_PTR(header);
 418 }
 419
 420 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 421 {
 422     char *ptr;
 423     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 424     strcpy(ptr, str);
 425     return ptr;
 426 }
 427
 428 PUB_FUNC void tcc_memcheck(int d)
 429 {
 430     WAIT_SEM(&mem_sem);
 431     nb_states += d;
 432     if (0 == nb_states && mem_cur_size) {
 433         mem_debug_header_t *header = mem_debug_chain;
 434         fflush(stdout);
 435         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 436             mem_cur_size, mem_max_size);
 437         while (header) {
 438             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 439                 header->file_name, header->line_num, header->size);
 440             header = header->next;
 441         }
 442         fflush(stderr);
 443         mem_cur_size = 0;
 444         mem_debug_chain = NULL;
 445 #if MEM_DEBUG-0 == 2
 446         exit(2);
 447 #endif
 448     }
 449     POST_SEM(&mem_sem);
 450 }
 451
 452 /* restore the debug versions */
 453 #define tcc_free(ptr)           tcc_free_debug(ptr)
 454 #define tcc_malloc(size)        tcc_malloc_debug(size, __FILE__, __LINE__)
 455 #define tcc_mallocz(size)       tcc_mallocz_debug(size, __FILE__, __LINE__)
 456 #define tcc_realloc(ptr,size)   tcc_realloc_debug(ptr, size, __FILE__, __LINE__)
 457 #define tcc_strdup(str)         tcc_strdup_debug(str, __FILE__, __LINE__)
 458
 459 #endif /* MEM_DEBUG */
 460
 461 #ifdef _WIN32
 462 # define realpath(file, buf) _fullpath(buf, file, 260)
 463 #endif
 464
 465 /* for #pragma once */
 466 ST_FUNC int normalized_PATHCMP(const char *f1, const char *f2)
 467 {
 468     char *p1, *p2;
 469     int ret = 1;
 470     if (!!(p1 = realpath(f1, NULL))) {
 471         if (!!(p2 = realpath(f2, NULL))) {
 472             ret = PATHCMP(p1, p2);
 473             libc_free(p2); /* realpath() requirement */
 474         }
 475         libc_free(p1);
 476     }
 477     return ret;
 478 }
 479
 480 /********************************************************/
 481 /* dynarrays */
 482
 483 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 484 {
 485     int nb, nb_alloc;
 486     void **pp;
 487
 488     nb = *nb_ptr;
 489     pp = *(void ***)ptab;
 490     /* every power of two we double array size */
 491     if ((nb & (nb - 1)) == 0) {
 492         if (!nb)
 493             nb_alloc = 1;
 494         else
 495             nb_alloc = nb * 2;
 496         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 497         *(void***)ptab = pp;
 498     }
 499     pp[nb++] = data;
 500     *nb_ptr = nb;
 501 }
 502
 503 ST_FUNC void dynarray_reset(void *pp, int *n)
 504 {
 505     void **p;
 506     for (p = *(void***)pp; *n; ++p, --*n)
 507         if (*p)
 508             tcc_free(*p);
 509     tcc_free(*(void**)pp);
 510     *(void**)pp = NULL;
 511 }
 512
 513 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 514 {
 515     const char *p;
 516     do {
 517         int c;
 518         CString str;
 519
 520         cstr_new(&str);
 521         for (p = in; c = *p, c != '\0' && c != PATHSEP[0]; ++p) {
 522             if (c == '{' && p[1] && p[2] == '}') {
 523                 c = p[1], p += 2;
 524                 if (c == 'B')
 525                     cstr_cat(&str, s->tcc_lib_path, -1);
 526                 if (c == 'R')
 527                     cstr_cat(&str, CONFIG_SYSROOT, -1);
 528                 if (c == 'f' && file) {
 529                     /* substitute current file's dir */
 530                     const char *f = file->true_filename;
 531                     const char *b = tcc_basename(f);
 532                     if (b > f)
 533                         cstr_cat(&str, f, b - f - 1);
 534                     else
 535                         cstr_cat(&str, ".", 1);
 536                 }
 537             } else {
 538                 cstr_ccat(&str, c);
 539             }
 540         }
 541         if (str.size) {
 542             cstr_ccat(&str, '\0');
 543             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 544         }
 545         cstr_free(&str);
 546         in = p+1;
 547     } while (*p);
 548 }
 549
 550 /********************************************************/
 551 /* warning / error */
 552
 553 /* warn_... option bits */
 554 #define WARN_ON  1 /* warning is on (-Woption) */
 555 #define WARN_ERR 2 /* warning is an error (-Werror=option) */
 556 #define WARN_NOE 4 /* warning is not an error (-Wno-error=option) */
 557
 558 /* error1() modes */
 559 enum { ERROR_WARN, ERROR_NOABORT, ERROR_ERROR };
 560
 561 static void error1(int mode, const char *fmt, va_list ap)
 562 {
 563     BufferedFile **pf, *f;
 564     TCCState *s1 = tcc_state;
 565     CString cs;
 566
 567     tcc_exit_state(s1);
 568
 569     if (mode == ERROR_WARN) {
 570         if (s1->warn_error)
 571             mode = ERROR_ERROR;
 572         if (s1->warn_num) {
 573             /* handle tcc_warning_c(warn_option)(fmt, ...) */
 574             int wopt = *(&s1->warn_none + s1->warn_num);
 575             s1->warn_num = 0;
 576             if (0 == (wopt & WARN_ON))
 577                 return;
 578             if (wopt & WARN_ERR)
 579                 mode = ERROR_ERROR;
 580             if (wopt & WARN_NOE)
 581                 mode = ERROR_WARN;
 582         }
 583         if (s1->warn_none)
 584             return;
 585     }
 586
 587     cstr_new(&cs);
 588     f = NULL;
 589     if (s1->error_set_jmp_enabled) { /* we're called while parsing a file */
 590         /* use upper file if inline ":asm:" or token ":paste:" */
 591         for (f = file; f && f->filename[0] == ':'; f = f->prev)
 592             ;
 593     }
 594     if (f) {
 595         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 596             cstr_printf(&cs, "In file included from %s:%d:\n",
 597                 (*pf)->filename, (*pf)->line_num - 1);
 598         cstr_printf(&cs, "%s:%d: ",
 599             f->filename, f->line_num - ((tok_flags & TOK_FLAG_BOL) && !macro_ptr));
 600     } else if (s1->current_filename) {
 601         cstr_printf(&cs, "%s: ", s1->current_filename);
 602     } else {
 603         cstr_printf(&cs, "tcc: ");
 604     }
 605     cstr_printf(&cs, mode == ERROR_WARN ? "warning: " : "error: ");
 606     if (pp_expr > 1)
 607         pp_error(&cs); /* special handler for preprocessor expression errors */
 608     else
 609         cstr_vprintf(&cs, fmt, ap);
 610     if (!s1->error_func) {
 611         /* default case: stderr */
 612         if (s1 && s1->output_type == TCC_OUTPUT_PREPROCESS && s1->ppfp == stdout)
 613             printf("\n"); /* print a newline during tcc -E */
 614         fflush(stdout); /* flush -v output */
 615         fprintf(stderr, "%s\n", (char*)cs.data);
 616         fflush(stderr); /* print error/warning now (win32) */
 617     } else {
 618         s1->error_func(s1->error_opaque, (char*)cs.data);
 619     }
 620     cstr_free(&cs);
 621     if (mode != ERROR_WARN)
 622         s1->nb_errors++;
 623     if (mode == ERROR_ERROR && s1->error_set_jmp_enabled) {
 624         while (nb_stk_data)
 625             tcc_free(*(void**)stk_data[--nb_stk_data]);
 626         longjmp(s1->error_jmp_buf, 1);
 627     }
 628 }
 629
 630 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque, TCCErrorFunc *error_func)
 631 {
 632     s->error_opaque = error_opaque;
 633     s->error_func = error_func;
 634 }
 635
 636 /* error without aborting current compilation */
 637 PUB_FUNC int _tcc_error_noabort(const char *fmt, ...)
 638 {
 639     va_list ap;
 640     va_start(ap, fmt);
 641     error1(ERROR_NOABORT, fmt, ap);
 642     va_end(ap);
 643     return -1;
 644 }
 645
 646 #undef _tcc_error
 647 PUB_FUNC void _tcc_error(const char *fmt, ...)
 648 {
 649     va_list ap;
 650     va_start(ap, fmt);
 651     error1(ERROR_ERROR, fmt, ap);
 652     exit(1);
 653 }
 654 #define _tcc_error use_tcc_error_noabort
 655
 656 PUB_FUNC void _tcc_warning(const char *fmt, ...)
 657 {
 658     va_list ap;
 659     va_start(ap, fmt);
 660     error1(ERROR_WARN, fmt, ap);
 661     va_end(ap);
 662 }
 663
 664
 665 /********************************************************/
 666 /* I/O layer */
 667
 668 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 669 {
 670     BufferedFile *bf;
 671     int buflen = initlen ? initlen : IO_BUF_SIZE;
 672
 673     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 674     bf->buf_ptr = bf->buffer;
 675     bf->buf_end = bf->buffer + initlen;
 676     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 677     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 678 #ifdef _WIN32
 679     normalize_slashes(bf->filename);
 680 #endif
 681     bf->true_filename = bf->filename;
 682     bf->line_num = 1;
 683     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 684     bf->fd = -1;
 685     bf->prev = file;
 686     bf->prev_tok_flags = tok_flags;
 687     file = bf;
 688     tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 689 }
 690
 691 ST_FUNC void tcc_close(void)
 692 {
 693     TCCState *s1 = tcc_state;
 694     BufferedFile *bf = file;
 695     if (bf->fd > 0) {
 696         close(bf->fd);
 697         total_lines += bf->line_num - 1;
 698     }
 699     if (bf->true_filename != bf->filename)
 700         tcc_free(bf->true_filename);
 701     file = bf->prev;
 702     tok_flags = bf->prev_tok_flags;
 703     tcc_free(bf);
 704 }
 705
 706 static int _tcc_open(TCCState *s1, const char *filename)
 707 {
 708     int fd;
 709     if (strcmp(filename, "-") == 0)
 710         fd = 0, filename = "<stdin>";
 711     else
 712         fd = open(filename, O_RDONLY | O_BINARY);
 713     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 714         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 715                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 716     return fd;
 717 }
 718
 719 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 720 {
 721     int fd = _tcc_open(s1, filename);
 722     if (fd < 0)
 723         return -1;
 724     tcc_open_bf(s1, filename, 0);
 725     file->fd = fd;
 726     return 0;
 727 }
 728
 729 /* compile the file opened in 'file'. Return non zero if errors. */
 730 static int tcc_compile(TCCState *s1, int filetype, const char *str, int fd)
 731 {
 732     /* Here we enter the code section where we use the global variables for
 733        parsing and code generation (tccpp.c, tccgen.c, <target>-gen.c).
 734        Other threads need to wait until we're done.
 735
 736        Alternatively we could use thread local storage for those global
 737        variables, which may or may not have advantages */
 738
 739     tcc_enter_state(s1);
 740     s1->error_set_jmp_enabled = 1;
 741
 742     if (setjmp(s1->error_jmp_buf) == 0) {
 743         s1->nb_errors = 0;
 744
 745         if (fd == -1) {
 746             int len = strlen(str);
 747             tcc_open_bf(s1, "<string>", len);
 748             memcpy(file->buffer, str, len);
 749         } else {
 750             tcc_open_bf(s1, str, 0);
 751             file->fd = fd;
 752         }
 753
 754         preprocess_start(s1, filetype);
 755         tccgen_init(s1);
 756
 757         if (s1->output_type == TCC_OUTPUT_PREPROCESS) {
 758             tcc_preprocess(s1);
 759         } else {
 760             tccelf_begin_file(s1);
 761             if (filetype & (AFF_TYPE_ASM | AFF_TYPE_ASMPP)) {
 762                 tcc_assemble(s1, !!(filetype & AFF_TYPE_ASMPP));
 763             } else {
 764                 tccgen_compile(s1);
 765             }
 766             tccelf_end_file(s1);
 767         }
 768     }
 769     tccgen_finish(s1);
 770     preprocess_end(s1);
 771     s1->error_set_jmp_enabled = 0;
 772     tcc_exit_state(s1);
 773     return s1->nb_errors != 0 ? -1 : 0;
 774 }
 775
 776 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 777 {
 778     return tcc_compile(s, s->filetype, str, -1);
 779 }
 780
 781 /* define a preprocessor symbol. value can be NULL, sym can be "sym=val" */
 782 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 783 {
 784     const char *eq;
 785     if (NULL == (eq = strchr(sym, '=')))
 786         eq = strchr(sym, 0);
 787     if (NULL == value)
 788         value = *eq ? eq + 1 : "1";
 789     cstr_printf(&s1->cmdline_defs, "#define %.*s %s\n", (int)(eq-sym), sym, value);
 790 }
 791
 792 /* undefine a preprocessor symbol */
 793 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 794 {
 795     cstr_printf(&s1->cmdline_defs, "#undef %s\n", sym);
 796 }
 797
 798
 799 LIBTCCAPI TCCState *tcc_new(void)
 800 {
 801     TCCState *s;
 802
 803     s = tcc_mallocz(sizeof(TCCState));
 804     if (!s)
 805         return NULL;
 806 #ifdef MEM_DEBUG
 807     tcc_memcheck(1);
 808 #endif
 809
 810 #undef gnu_ext
 811
 812     s->gnu_ext = 1;
 813     s->tcc_ext = 1;
 814     s->nocommon = 1;
 815     s->dollars_in_identifiers = 1; /*on by default like in gcc/clang*/
 816     s->cversion = 199901; /* default unless -std=c11 is supplied */
 817     s->warn_implicit_function_declaration = 1;
 818     s->warn_discarded_qualifiers = 1;
 819     s->ms_extensions = 1;
 820
 821 #ifdef CHAR_IS_UNSIGNED
 822     s->char_is_unsigned = 1;
 823 #endif
 824 #ifdef TCC_TARGET_I386
 825     s->seg_size = 32;
 826 #endif
 827     /* enable this if you want symbols with leading underscore on windows: */
 828 #if defined TCC_TARGET_MACHO /* || defined TCC_TARGET_PE */
 829     s->leading_underscore = 1;
 830 #endif
 831 #ifdef TCC_TARGET_ARM
 832     s->float_abi = ARM_FLOAT_ABI;
 833 #endif
 834 #ifdef CONFIG_NEW_DTAGS
 835     s->enable_new_dtags = 1;
 836 #endif
 837     s->ppfp = stdout;
 838     /* might be used in error() before preprocess_start() */
 839     s->include_stack_ptr = s->include_stack;
 840
 841     tcc_set_lib_path(s, CONFIG_TCCDIR);
 842     return s;
 843 }
 844
 845 LIBTCCAPI void tcc_delete(TCCState *s1)
 846 {
 847     /* free sections */
 848     tccelf_delete(s1);
 849
 850     /* free library paths */
 851     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 852     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 853
 854     /* free include paths */
 855     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 856     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 857
 858     tcc_free(s1->tcc_lib_path);
 859     tcc_free(s1->soname);
 860     tcc_free(s1->rpath);
 861     tcc_free(s1->elf_entryname);
 862     tcc_free(s1->init_symbol);
 863     tcc_free(s1->fini_symbol);
 864     tcc_free(s1->mapfile);
 865     tcc_free(s1->outfile);
 866     tcc_free(s1->deps_outfile);
 867 #if defined TCC_TARGET_MACHO
 868     tcc_free(s1->install_name);
 869 #endif
 870     dynarray_reset(&s1->files, &s1->nb_files);
 871     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 872     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 873     dynarray_reset(&s1->argv, &s1->argc);
 874     cstr_free(&s1->cmdline_defs);
 875     cstr_free(&s1->cmdline_incl);
 876     cstr_free(&s1->linker_arg);
 877 #ifdef TCC_IS_NATIVE
 878     /* free runtime memory */
 879     tcc_run_free(s1);
 880 #endif
 881     tcc_free(s1->dState);
 882     tcc_free(s1);
 883 #ifdef MEM_DEBUG
 884     tcc_memcheck(-1);
 885 #endif
 886 }
 887
 888 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 889 {
 890 #ifdef CONFIG_TCC_PIE
 891     if (output_type == TCC_OUTPUT_EXE)
 892         output_type |= TCC_OUTPUT_DYN;
 893 #endif
 894     s->output_type = output_type;
 895
 896     if (!s->nostdinc) {
 897         /* default include paths */
 898         /* -isystem paths have already been handled */
 899         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 900     }
 901
 902     if (output_type == TCC_OUTPUT_PREPROCESS) {
 903         s->do_debug = 0;
 904         return 0;
 905     }
 906
 907     /* add sections */
 908     tccelf_new(s);
 909
 910     if (output_type == TCC_OUTPUT_OBJ) {
 911         /* always elf for objects */
 912         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 913         return 0;
 914     }
 915
 916     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 917
 918 #ifdef TCC_TARGET_PE
 919 # ifdef TCC_IS_NATIVE
 920     /* allow linking with system dll's directly */
 921     tcc_add_systemdir(s);
 922 # endif
 923 #elif defined TCC_TARGET_MACHO
 924 # ifdef TCC_IS_NATIVE
 925     tcc_add_macos_sdkpath(s);
 926 # endif
 927 #else
 928     /* paths for crt objects */
 929     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 930     if (output_type != TCC_OUTPUT_MEMORY && !s->nostdlib)
 931         tccelf_add_crtbegin(s);
 932 #endif
 933     return 0;
 934 }
 935
 936 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 937 {
 938     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
 939     return 0;
 940 }
 941
 942 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
 943 {
 944     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
 945     return 0;
 946 }
 947
 948 /* add/update a 'DLLReference', Just find if level == -1  */
 949 ST_FUNC DLLReference *tcc_add_dllref(TCCState *s1, const char *dllname, int level)
 950 {
 951     DLLReference *ref = NULL;
 952     int i;
 953     for (i = 0; i < s1->nb_loaded_dlls; i++)
 954         if (0 == strcmp(s1->loaded_dlls[i]->name, dllname)) {
 955             ref = s1->loaded_dlls[i];
 956             break;
 957         }
 958     if (level == -1)
 959         return ref;
 960     if (ref) {
 961         if (level < ref->level)
 962             ref->level = level;
 963         ref->found = 1;
 964         return ref;
 965     }
 966     ref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
 967     strcpy(ref->name, dllname);
 968     dynarray_add(&s1->loaded_dlls, &s1->nb_loaded_dlls, ref);
 969     ref->level = level;
 970     ref->index = s1->nb_loaded_dlls;
 971     return ref;
 972 }
 973
 974 /* OpenBSD: choose latest from libxxx.so.x.y versions */
 975 #if defined TARGETOS_OpenBSD && !defined _WIN32
 976 #include <glob.h>
 977 static int tcc_glob_so(TCCState *s1, const char *pattern, char *buf, int size)
 978 {
 979     const char *star;
 980     glob_t g;
 981     char *p;
 982     int i, v, v1, v2, v3;
 983
 984     star = strchr(pattern, '*');
 985     if (!star || glob(pattern, 0, NULL, &g))
 986         return -1;
 987     for (v = -1, i = 0; i < g.gl_pathc; ++i) {
 988         p = g.gl_pathv[i];
 989         if (2 != sscanf(p + (star - pattern), "%d.%d.%d", &v1, &v2, &v3))
 990             continue;
 991         if ((v1 = v1 * 1000 + v2) > v)
 992             v = v1, pstrcpy(buf, size, p);
 993     }
 994     globfree(&g);
 995     return v;
 996 }
 997 #endif
 998
 999 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1000 {
1001     int fd, ret = -1;
1002
1003 #if defined TARGETOS_OpenBSD && !defined _WIN32
1004     char buf[1024];
1005     if (tcc_glob_so(s1, filename, buf, sizeof buf) >= 0)
1006         filename = buf;
1007 #endif
1008
1009     /* ignore binary files with -E */
1010     if (s1->output_type == TCC_OUTPUT_PREPROCESS
1011         && (flags & AFF_TYPE_BIN))
1012         return 0;
1013
1014     /* open the file */
1015     fd = _tcc_open(s1, filename);
1016     if (fd < 0) {
1017         if (flags & AFF_PRINT_ERROR)
1018             tcc_error_noabort("file '%s' not found", filename);
1019         return FILE_NOT_FOUND;
1020     }
1021
1022     s1->current_filename = filename;
1023     if (flags & AFF_TYPE_BIN) {
1024         ElfW(Ehdr) ehdr;
1025         int obj_type;
1026
1027         obj_type = tcc_object_type(fd, &ehdr);
1028         lseek(fd, 0, SEEK_SET);
1029
1030         switch (obj_type) {
1031
1032         case AFF_BINTYPE_REL:
1033             ret = tcc_load_object_file(s1, fd, 0);
1034             break;
1035
1036         case AFF_BINTYPE_AR:
1037             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1038             break;
1039
1040 #ifdef TCC_TARGET_PE
1041         default:
1042             ret = pe_load_file(s1, fd, filename);
1043             goto check_success;
1044
1045 #elif defined TCC_TARGET_MACHO
1046         case AFF_BINTYPE_DYN:
1047         case_dyn_or_tbd:
1048             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1049 #ifdef TCC_IS_NATIVE
1050                 void* dl;
1051                 const char* soname = filename;
1052                 if (obj_type != AFF_BINTYPE_DYN)
1053                     soname = macho_tbd_soname(filename);
1054                 dl = dlopen(soname, RTLD_GLOBAL | RTLD_LAZY);
1055                 if (dl)
1056                     tcc_add_dllref(s1, soname, 0)->handle = dl, ret = 0;
1057                 if (filename != soname)
1058                     tcc_free((void *)soname);
1059 #endif
1060             } else if (obj_type == AFF_BINTYPE_DYN) {
1061                 ret = macho_load_dll(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1062             } else {
1063                 ret = macho_load_tbd(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1064             }
1065             goto check_success;
1066         default:
1067         {
1068             const char *ext = tcc_fileextension(filename);
1069             if (!strcmp(ext, ".tbd"))
1070                 goto case_dyn_or_tbd;
1071             if (!strcmp(ext, ".dylib")) {
1072                 obj_type = AFF_BINTYPE_DYN;
1073                 goto case_dyn_or_tbd;
1074             }
1075             goto check_success;
1076         }
1077
1078 #else /* unix */
1079         case AFF_BINTYPE_DYN:
1080             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1081 #ifdef TCC_IS_NATIVE
1082                 void* dl = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1083                 if (dl)
1084                     tcc_add_dllref(s1, filename, 0)->handle = dl, ret = 0;
1085 #endif
1086             } else
1087                 ret = tcc_load_dll(s1, fd, filename, (flags & AFF_REFERENCED_DLL) != 0);
1088             break;
1089
1090         default:
1091             /* as GNU ld, consider it is an ld script if not recognized */
1092             ret = tcc_load_ldscript(s1, fd);
1093             goto check_success;
1094
1095 #endif /* pe / macos / unix */
1096
1097 check_success:
1098             if (ret < 0)
1099                 tcc_error_noabort("%s: unrecognized file type", filename);
1100             break;
1101
1102 #ifdef TCC_TARGET_COFF
1103         case AFF_BINTYPE_C67:
1104             ret = tcc_load_coff(s1, fd);
1105             break;
1106 #endif
1107         }
1108         close(fd);
1109     } else {
1110         /* update target deps */
1111         dynarray_add(&s1->target_deps, &s1->nb_target_deps, tcc_strdup(filename));
1112         ret = tcc_compile(s1, flags, filename, fd);
1113     }
1114     s1->current_filename = NULL;
1115     return ret;
1116 }
1117
1118 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1119 {
1120     int filetype = s->filetype;
1121     if (0 == (filetype & AFF_TYPE_MASK)) {
1122         /* use a file extension to detect a filetype */
1123         const char *ext = tcc_fileextension(filename);
1124         if (ext[0]) {
1125             ext++;
1126             if (!strcmp(ext, "S"))
1127                 filetype = AFF_TYPE_ASMPP;
1128             else if (!strcmp(ext, "s"))
1129                 filetype = AFF_TYPE_ASM;
1130             else if (!PATHCMP(ext, "c")
1131                      || !PATHCMP(ext, "h")
1132                      || !PATHCMP(ext, "i"))
1133                 filetype = AFF_TYPE_C;
1134             else
1135                 filetype |= AFF_TYPE_BIN;
1136         } else {
1137             filetype = AFF_TYPE_C;
1138         }
1139     }
1140     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1141 }
1142
1143 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1144 {
1145     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1146     return 0;
1147 }
1148
1149 static int tcc_add_library_internal(TCCState *s1, const char *fmt,
1150     const char *filename, int flags, char **paths, int nb_paths)
1151 {
1152     char buf[1024];
1153     int i, ret;
1154
1155     for(i = 0; i < nb_paths; i++) {
1156         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1157         ret = tcc_add_file_internal(s1, buf, (flags & ~AFF_PRINT_ERROR) | AFF_TYPE_BIN);
1158         if (ret != FILE_NOT_FOUND)
1159             return ret;
1160     }
1161     if (flags & AFF_PRINT_ERROR)
1162         tcc_error_noabort("file '%s' not found", filename);
1163     return FILE_NOT_FOUND;
1164 }
1165
1166 /* find and load a dll. Return non zero if not found */
1167 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1168 {
1169     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1170         s->library_paths, s->nb_library_paths);
1171 }
1172
1173 /* find [cross-]libtcc1.a and tcc helper objects in library path */
1174 ST_FUNC void tcc_add_support(TCCState *s1, const char *filename)
1175 {
1176     char buf[100];
1177     if (CONFIG_TCC_CROSSPREFIX[0])
1178         filename = strcat(strcpy(buf, CONFIG_TCC_CROSSPREFIX), filename);
1179     tcc_add_dll(s1, filename, AFF_PRINT_ERROR);
1180 }
1181
1182 #if !defined TCC_TARGET_PE && !defined TCC_TARGET_MACHO
1183 ST_FUNC int tcc_add_crt(TCCState *s1, const char *filename)
1184 {
1185     return tcc_add_library_internal(s1, "%s/%s",
1186         filename, AFF_PRINT_ERROR, s1->crt_paths, s1->nb_crt_paths);
1187 }
1188 #endif
1189
1190 /* the library name is the same as the argument of the '-l' option */
1191 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1192 {
1193 #if defined TCC_TARGET_PE
1194     static const char * const libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1195     const char * const *pp = s->static_link ? libs + 4 : libs;
1196 #elif defined TCC_TARGET_MACHO
1197     static const char * const libs[] = { "%s/lib%s.dylib", "%s/lib%s.tbd", "%s/lib%s.a", NULL };
1198     const char * const *pp = s->static_link ? libs + 2 : libs;
1199 #elif defined TARGETOS_OpenBSD
1200     static const char * const libs[] = { "%s/lib%s.so.*", "%s/lib%s.a", NULL };
1201     const char * const *pp = s->static_link ? libs + 1 : libs;
1202 #else
1203     static const char * const libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1204     const char * const *pp = s->static_link ? libs + 1 : libs;
1205 #endif
1206     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1207     while (*pp) {
1208         int ret = tcc_add_library_internal(s, *pp,
1209             libraryname, flags, s->library_paths, s->nb_library_paths);
1210         if (ret != FILE_NOT_FOUND)
1211             return ret;
1212         ++pp;
1213     }
1214     return FILE_NOT_FOUND;
1215 }
1216
1217 PUB_FUNC int tcc_add_library_err(TCCState *s1, const char *libname)
1218 {
1219     int ret = tcc_add_library(s1, libname);
1220     if (ret == FILE_NOT_FOUND)
1221         tcc_error_noabort("library '%s' not found", libname);
1222     return ret;
1223 }
1224
1225 /* handle #pragma comment(lib,) */
1226 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1227 {
1228     int i;
1229     for (i = 0; i < s1->nb_pragma_libs; i++)
1230         tcc_add_library_err(s1, s1->pragma_libs[i]);
1231 }
1232
1233 LIBTCCAPI int tcc_add_symbol(TCCState *s1, const char *name, const void *val)
1234 {
1235 #ifdef TCC_TARGET_PE
1236     /* On x86_64 'val' might not be reachable with a 32bit offset.
1237        So it is handled here as if it were in a DLL. */
1238     pe_putimport(s1, 0, name, (uintptr_t)val);
1239 #else
1240     char buf[256];
1241     if (s1->leading_underscore) {
1242         buf[0] = '_';
1243         pstrcpy(buf + 1, sizeof(buf) - 1, name);
1244         name = buf;
1245     }
1246     set_global_sym(s1, name, NULL, (addr_t)(uintptr_t)val); /* NULL: SHN_ABS */
1247 #endif
1248     return 0;
1249 }
1250
1251 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1252 {
1253     tcc_free(s->tcc_lib_path);
1254     s->tcc_lib_path = tcc_strdup(path);
1255 }
1256
1257 /********************************************************/
1258 /* options parser */
1259
1260 static int strstart(const char *val, const char **str)
1261 {
1262     const char *p, *q;
1263     p = *str;
1264     q = val;
1265     while (*q) {
1266         if (*p != *q)
1267             return 0;
1268         p++;
1269         q++;
1270     }
1271     *str = p;
1272     return 1;
1273 }
1274
1275 /* Like strstart, but automatically takes into account that ld options can
1276  *
1277  * - start with double or single dash (e.g. '--soname' or '-soname')
1278  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1279  *   or '-Wl,-soname=x.so')
1280  *
1281  * you provide `val` always in 'option[=]' form (no leading -)
1282  */
1283 static int link_option(const char *str, const char *val, const char **ptr)
1284 {
1285     const char *p, *q;
1286     int ret;
1287
1288     /* there should be 1 or 2 dashes */
1289     if (*str++ != '-')
1290         return 0;
1291     if (*str == '-')
1292         str++;
1293
1294     /* then str & val should match (potentially up to '=') */
1295     p = str;
1296     q = val;
1297
1298     ret = 1;
1299     if (q[0] == '?') {
1300         ++q;
1301         if (strstart("no-", &p))
1302             ret = -1;
1303     }
1304
1305     while (*q != '\0' && *q != '=') {
1306         if (*p != *q)
1307             return 0;
1308         p++;
1309         q++;
1310     }
1311
1312     /* '=' near eos means ',' or '=' is ok */
1313     if (*q == '=') {
1314         if (*p == 0)
1315             *ptr = p;
1316         if (*p != ',' && *p != '=')
1317             return 0;
1318         p++;
1319     } else if (*p) {
1320         return 0;
1321     }
1322     *ptr = p;
1323     return ret;
1324 }
1325
1326 static const char *skip_linker_arg(const char **str)
1327 {
1328     const char *s1 = *str;
1329     const char *s2 = strchr(s1, ',');
1330     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1331     return s2;
1332 }
1333
1334 static void copy_linker_arg(char **pp, const char *s, int sep)
1335 {
1336     const char *q = s;
1337     char *p = *pp;
1338     int l = 0;
1339     if (p && sep)
1340         p[l = strlen(p)] = sep, ++l;
1341     skip_linker_arg(&q);
1342     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1343 }
1344
1345 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1346 {
1347     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1348     f->type = filetype;
1349     strcpy(f->name, filename);
1350     dynarray_add(&s->files, &s->nb_files, f);
1351 }
1352
1353 /* set linker options */
1354 static int tcc_set_linker(TCCState *s, const char *option)
1355 {
1356     TCCState *s1 = s;
1357     while (*option) {
1358
1359         const char *p = NULL;
1360         char *end = NULL;
1361         int ignoring = 0;
1362         int ret;
1363
1364         if (link_option(option, "Bsymbolic", &p)) {
1365             s->symbolic = 1;
1366         } else if (link_option(option, "nostdlib", &p)) {
1367             s->nostdlib = 1;
1368         } else if (link_option(option, "e=", &p)
1369                ||  link_option(option, "entry=", &p)) {
1370             copy_linker_arg(&s->elf_entryname, p, 0);
1371         } else if (link_option(option, "fini=", &p)) {
1372             copy_linker_arg(&s->fini_symbol, p, 0);
1373             ignoring = 1;
1374         } else if (link_option(option, "image-base=", &p)
1375                 || link_option(option, "Ttext=", &p)) {
1376             s->text_addr = strtoull(p, &end, 16);
1377             s->has_text_addr = 1;
1378         } else if (link_option(option, "init=", &p)) {
1379             copy_linker_arg(&s->init_symbol, p, 0);
1380             ignoring = 1;
1381         } else if (link_option(option, "Map=", &p)) {
1382             copy_linker_arg(&s->mapfile, p, 0);
1383             ignoring = 1;
1384         } else if (link_option(option, "oformat=", &p)) {
1385 #if defined(TCC_TARGET_PE)
1386             if (strstart("pe-", &p)) {
1387 #elif PTR_SIZE == 8
1388             if (strstart("elf64-", &p)) {
1389 #else
1390             if (strstart("elf32-", &p)) {
1391 #endif
1392                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1393             } else if (!strcmp(p, "binary")) {
1394                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1395 #ifdef TCC_TARGET_COFF
1396             } else if (!strcmp(p, "coff")) {
1397                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1398 #endif
1399             } else
1400                 goto err;
1401
1402         } else if (link_option(option, "as-needed", &p)) {
1403             ignoring = 1;
1404         } else if (link_option(option, "O", &p)) {
1405             ignoring = 1;
1406         } else if (link_option(option, "export-all-symbols", &p)) {
1407             s->rdynamic = 1;
1408         } else if (link_option(option, "export-dynamic", &p)) {
1409             s->rdynamic = 1;
1410         } else if (link_option(option, "rpath=", &p)) {
1411             copy_linker_arg(&s->rpath, p, ':');
1412         } else if (link_option(option, "enable-new-dtags", &p)) {
1413             s->enable_new_dtags = 1;
1414         } else if (link_option(option, "section-alignment=", &p)) {
1415             s->section_align = strtoul(p, &end, 16);
1416         } else if (link_option(option, "soname=", &p)) {
1417             copy_linker_arg(&s->soname, p, 0);
1418         } else if (link_option(option, "install_name=", &p)) {
1419             copy_linker_arg(&s->soname, p, 0);
1420 #ifdef TCC_TARGET_PE
1421         } else if (link_option(option, "large-address-aware", &p)) {
1422             s->pe_characteristics |= 0x20;
1423         } else if (link_option(option, "file-alignment=", &p)) {
1424             s->pe_file_align = strtoul(p, &end, 16);
1425         } else if (link_option(option, "stack=", &p)) {
1426             s->pe_stack_size = strtoul(p, &end, 10);
1427         } else if (link_option(option, "subsystem=", &p)) {
1428 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1429             if (!strcmp(p, "native")) {
1430                 s->pe_subsystem = 1;
1431             } else if (!strcmp(p, "console")) {
1432                 s->pe_subsystem = 3;
1433             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1434                 s->pe_subsystem = 2;
1435             } else if (!strcmp(p, "posix")) {
1436                 s->pe_subsystem = 7;
1437             } else if (!strcmp(p, "efiapp")) {
1438                 s->pe_subsystem = 10;
1439             } else if (!strcmp(p, "efiboot")) {
1440                 s->pe_subsystem = 11;
1441             } else if (!strcmp(p, "efiruntime")) {
1442                 s->pe_subsystem = 12;
1443             } else if (!strcmp(p, "efirom")) {
1444                 s->pe_subsystem = 13;
1445 #elif defined(TCC_TARGET_ARM)
1446             if (!strcmp(p, "wince")) {
1447                 s->pe_subsystem = 9;
1448 #endif
1449             } else
1450                 goto err;
1451 #endif
1452 #ifdef TCC_TARGET_MACHO
1453         } else if (link_option(option, "all_load", &p)) {
1454             s->filetype |= AFF_WHOLE_ARCHIVE;
1455         } else if (link_option(option, "force_load", &p)) {
1456             s->filetype |= AFF_WHOLE_ARCHIVE;
1457             args_parser_add_file(s, p, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1458             s->nb_libraries++;
1459         } else if (link_option(option, "single_module", &p)) {
1460             ignoring = 1;
1461 #endif
1462         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1463             if (ret > 0)
1464                 s->filetype |= AFF_WHOLE_ARCHIVE;
1465             else
1466                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1467         } else if (link_option(option, "z=", &p)) {
1468             ignoring = 1;
1469         } else if (p) {
1470             return 0;
1471         } else {
1472     err:
1473             return tcc_error_noabort("unsupported linker option '%s'", option);
1474         }
1475         if (ignoring)
1476             tcc_warning_c(warn_unsupported)("unsupported linker option '%s'", option);
1477         option = skip_linker_arg(&p);
1478     }
1479     return 1;
1480 }
1481
1482 typedef struct TCCOption {
1483     const char *name;
1484     uint16_t index;
1485     uint16_t flags;
1486 } TCCOption;
1487
1488 enum {
1489     TCC_OPTION_ignored = 0,
1490     TCC_OPTION_HELP,
1491     TCC_OPTION_HELP2,
1492     TCC_OPTION_v,
1493     TCC_OPTION_I,
1494     TCC_OPTION_D,
1495     TCC_OPTION_U,
1496     TCC_OPTION_P,
1497     TCC_OPTION_L,
1498     TCC_OPTION_B,
1499     TCC_OPTION_l,
1500     TCC_OPTION_bench,
1501     TCC_OPTION_bt,
1502     TCC_OPTION_b,
1503     TCC_OPTION_ba,
1504     TCC_OPTION_g,
1505     TCC_OPTION_c,
1506     TCC_OPTION_dumpmachine,
1507     TCC_OPTION_dumpversion,
1508     TCC_OPTION_d,
1509     TCC_OPTION_static,
1510     TCC_OPTION_std,
1511     TCC_OPTION_shared,
1512     TCC_OPTION_soname,
1513     TCC_OPTION_o,
1514     TCC_OPTION_r,
1515     TCC_OPTION_Wl,
1516     TCC_OPTION_Wp,
1517     TCC_OPTION_W,
1518     TCC_OPTION_O,
1519     TCC_OPTION_mfloat_abi,
1520     TCC_OPTION_m,
1521     TCC_OPTION_f,
1522     TCC_OPTION_isystem,
1523     TCC_OPTION_iwithprefix,
1524     TCC_OPTION_include,
1525     TCC_OPTION_nostdinc,
1526     TCC_OPTION_nostdlib,
1527     TCC_OPTION_print_search_dirs,
1528     TCC_OPTION_rdynamic,
1529     TCC_OPTION_pthread,
1530     TCC_OPTION_run,
1531     TCC_OPTION_w,
1532     TCC_OPTION_E,
1533     TCC_OPTION_M,
1534     TCC_OPTION_MD,
1535     TCC_OPTION_MF,
1536     TCC_OPTION_MM,
1537     TCC_OPTION_MMD,
1538     TCC_OPTION_MP,
1539     TCC_OPTION_x,
1540     TCC_OPTION_ar,
1541     TCC_OPTION_impdef,
1542     TCC_OPTION_dynamiclib,
1543     TCC_OPTION_flat_namespace,
1544     TCC_OPTION_two_levelnamespace,
1545     TCC_OPTION_undefined,
1546     TCC_OPTION_install_name,
1547     TCC_OPTION_compatibility_version ,
1548     TCC_OPTION_current_version,
1549 };
1550
1551 #define TCC_OPTION_HAS_ARG 0x0001
1552 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1553
1554 static const TCCOption tcc_options[] = {
1555     { "h", TCC_OPTION_HELP, 0 },
1556     { "-help", TCC_OPTION_HELP, 0 },
1557     { "?", TCC_OPTION_HELP, 0 },
1558     { "hh", TCC_OPTION_HELP2, 0 },
1559     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1560     { "-version", TCC_OPTION_v, 0 }, /* handle as verbose, also prints version*/
1561     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1562     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1563     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1564     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1565     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1566     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1567     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1568     { "bench", TCC_OPTION_bench, 0 },
1569 #ifdef CONFIG_TCC_BACKTRACE
1570     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1571 #endif
1572 #ifdef CONFIG_TCC_BCHECK
1573     { "b", TCC_OPTION_b, 0 },
1574 #endif
1575     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1576 #ifdef TCC_TARGET_MACHO
1577     { "compatibility_version", TCC_OPTION_compatibility_version, TCC_OPTION_HAS_ARG },
1578     { "current_version", TCC_OPTION_current_version, TCC_OPTION_HAS_ARG },
1579 #endif
1580     { "c", TCC_OPTION_c, 0 },
1581 #ifdef TCC_TARGET_MACHO
1582     { "dynamiclib", TCC_OPTION_dynamiclib, 0 },
1583 #endif
1584     { "dumpmachine", TCC_OPTION_dumpmachine, 0},
1585     { "dumpversion", TCC_OPTION_dumpversion, 0},
1586     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1587     { "static", TCC_OPTION_static, 0 },
1588     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1589     { "shared", TCC_OPTION_shared, 0 },
1590     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1591     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1592     { "pthread", TCC_OPTION_pthread, 0},
1593     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1594     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1595     { "r", TCC_OPTION_r, 0 },
1596     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1597     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1598     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1599     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1600 #ifdef TCC_TARGET_ARM
1601     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1602 #endif
1603     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1604 #ifdef TCC_TARGET_MACHO
1605     { "flat_namespace", TCC_OPTION_flat_namespace, 0 },
1606 #endif
1607     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1608     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1609     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1610     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1611     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1612     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1613     { "w", TCC_OPTION_w, 0 },
1614     { "E", TCC_OPTION_E, 0},
1615     { "M", TCC_OPTION_M, 0},
1616     { "MD", TCC_OPTION_MD, 0},
1617     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1618     { "MM", TCC_OPTION_MM, 0},
1619     { "MMD", TCC_OPTION_MMD, 0},
1620     { "MP", TCC_OPTION_MP, 0},
1621     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1622     { "ar", TCC_OPTION_ar, 0},
1623 #ifdef TCC_TARGET_PE
1624     { "impdef", TCC_OPTION_impdef, 0},
1625 #endif
1626 #ifdef TCC_TARGET_MACHO
1627     { "install_name", TCC_OPTION_install_name, TCC_OPTION_HAS_ARG },
1628     { "two_levelnamespace", TCC_OPTION_two_levelnamespace, 0 },
1629     { "undefined", TCC_OPTION_undefined, TCC_OPTION_HAS_ARG },
1630 #endif
1631     /* ignored (silently, except after -Wunsupported) */
1632     { "arch", 0, TCC_OPTION_HAS_ARG},
1633     { "C", 0, 0 },
1634     { "-param", 0, TCC_OPTION_HAS_ARG },
1635     { "pedantic", 0, 0 },
1636     { "pipe", 0, 0 },
1637     { "s", 0, 0 },
1638     { "traditional", 0, 0 },
1639     { NULL, 0, 0 },
1640 };
1641
1642 typedef struct FlagDef {
1643     uint16_t offset;
1644     uint16_t flags;
1645     const char *name;
1646 } FlagDef;
1647
1648 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1649 #define FD_INVERT 0x0002 /* invert value before storing */
1650
1651 static const FlagDef options_W[] = {
1652     { offsetof(TCCState, warn_all), WD_ALL, "all" },
1653     { offsetof(TCCState, warn_error), 0, "error" },
1654     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1655     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1656     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL, "implicit-function-declaration" },
1657     { offsetof(TCCState, warn_discarded_qualifiers), WD_ALL, "discarded-qualifiers" },
1658     { 0, 0, NULL }
1659 };
1660
1661 static const FlagDef options_f[] = {
1662     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1663     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1664     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1665     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1666     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1667     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1668     { offsetof(TCCState, test_coverage), 0, "test-coverage" },
1669     { 0, 0, NULL }
1670 };
1671
1672 static const FlagDef options_m[] = {
1673     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1674 #ifdef TCC_TARGET_X86_64
1675     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1676 #endif
1677     { 0, 0, NULL }
1678 };
1679
1680 static int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1681 {
1682     int value, mask, ret;
1683     const FlagDef *p;
1684     const char *r;
1685     unsigned char *f;
1686
1687     r = name, value = !strstart("no-", &r), mask = 0;
1688
1689     /* when called with options_W, look for -W[no-]error=<option> */
1690     if ((flags->flags & WD_ALL) && strstart("error=", &r))
1691         value = value ? WARN_ON|WARN_ERR : WARN_NOE, mask = WARN_ON;
1692
1693     for (ret = -1, p = flags; p->name; ++p) {
1694         if (ret) {
1695             if (strcmp(r, p->name))
1696                 continue;
1697         } else {
1698             if (0 == (p->flags & WD_ALL))
1699                 continue;
1700         }
1701
1702         f = (unsigned char *)s + p->offset;
1703         *f = (*f & mask) | (value ^ !!(p->flags & FD_INVERT));
1704
1705         if (ret) {
1706             ret = 0;
1707             if (strcmp(r, "all"))
1708                 break;
1709         }
1710     }
1711     return ret;
1712 }
1713
1714 static const char dumpmachine_str[] =
1715 /* this is a best guess, please refine as necessary */
1716 #ifdef TCC_TARGET_I386
1717     "i386-pc"
1718 #elif defined TCC_TARGET_X86_64
1719     "x86_64-pc"
1720 #elif defined TCC_TARGET_C67
1721     "c67"
1722 #elif defined TCC_TARGET_ARM
1723     "arm"
1724 #elif defined TCC_TARGET_ARM64
1725     "aarch64"
1726 #elif defined TCC_TARGET_RISCV64
1727     "riscv64"
1728 #endif
1729     "-"
1730 #ifdef TCC_TARGET_PE
1731     "mingw32"
1732 #elif defined(TCC_TARGET_MACHO)
1733     "apple-darwin"
1734 #elif TARGETOS_FreeBSD || TARGETOS_FreeBSD_kernel
1735     "freebsd"
1736 #elif TARGETOS_OpenBSD
1737     "openbsd"
1738 #elif TARGETOS_NetBSD
1739     "netbsd"
1740 #else
1741     "linux-gnu"
1742 #endif
1743 ;
1744
1745 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1746 {
1747     int ret = 0, q, c;
1748     CString str;
1749     for(;;) {
1750         while (c = (unsigned char)*r, c && c <= ' ')
1751           ++r;
1752         if (c == 0)
1753             break;
1754         q = 0;
1755         cstr_new(&str);
1756         while (c = (unsigned char)*r, c) {
1757             ++r;
1758             if (c == '\\' && (*r == '"' || *r == '\\')) {
1759                 c = *r++;
1760             } else if (c == '"') {
1761                 q = !q;
1762                 continue;
1763             } else if (q == 0 && c <= ' ') {
1764                 break;
1765             }
1766             cstr_ccat(&str, c);
1767         }
1768         cstr_ccat(&str, 0);
1769         //printf("<%s>\n", str.data), fflush(stdout);
1770         dynarray_add(argv, argc, tcc_strdup(str.data));
1771         cstr_free(&str);
1772         ++ret;
1773     }
1774     return ret;
1775 }
1776
1777 /* read list file */
1778 static int args_parser_listfile(TCCState *s,
1779     const char *filename, int optind, int *pargc, char ***pargv)
1780 {
1781     TCCState *s1 = s;
1782     int fd, i;
1783     char *p;
1784     int argc = 0;
1785     char **argv = NULL;
1786
1787     fd = open(filename, O_RDONLY | O_BINARY);
1788     if (fd < 0)
1789         return tcc_error_noabort("listfile '%s' not found", filename);
1790
1791     p = tcc_load_text(fd);
1792     for (i = 0; i < *pargc; ++i)
1793         if (i == optind)
1794             args_parser_make_argv(p, &argc, &argv);
1795         else
1796             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1797
1798     tcc_free(p);
1799     dynarray_reset(&s->argv, &s->argc);
1800     *pargc = s->argc = argc, *pargv = s->argv = argv;
1801     return 0;
1802 }
1803
1804 #if defined TCC_TARGET_MACHO
1805 static uint32_t parse_version(TCCState *s1, const char *version)
1806 {
1807     uint32_t a = 0;
1808     uint32_t b = 0;
1809     uint32_t c = 0;
1810     char* last;
1811
1812     a = strtoul(version, &last, 10);
1813     if (*last == '.') {
1814         b = strtoul(&last[1], &last, 10);
1815         if (*last == '.')
1816              c = strtoul(&last[1], &last, 10);
1817     }
1818     if (*last || a > 0xffff || b > 0xff || c > 0xff)
1819         tcc_error_noabort("version a.b.c not correct: %s", version);
1820     return (a << 16) | (b << 8) | c;
1821 }
1822 #endif
1823
1824 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1825 {
1826     TCCState *s1 = s;
1827     const TCCOption *popt;
1828     const char *optarg, *r;
1829     const char *run = NULL;
1830     int x;
1831     int tool = 0, arg_start = 0, noaction = optind;
1832     char **argv = *pargv;
1833     int argc = *pargc;
1834
1835     cstr_reset(&s->linker_arg);
1836
1837     while (optind < argc) {
1838         r = argv[optind];
1839         if (r[0] == '@' && r[1] != '\0') {
1840             if (args_parser_listfile(s, r + 1, optind, &argc, &argv))
1841                 return -1;
1842             continue;
1843         }
1844         optind++;
1845         if (tool) {
1846             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1847                 ++s->verbose;
1848             continue;
1849         }
1850 reparse:
1851         if (r[0] != '-' || r[1] == '\0') {
1852             args_parser_add_file(s, r, s->filetype);
1853             if (run) {
1854 dorun:
1855                 if (tcc_set_options(s, run))
1856                     return -1;
1857                 arg_start = optind - 1;
1858                 break;
1859             }
1860             continue;
1861         }
1862
1863         /* allow "tcc files... -run -- args ..." */
1864         if (r[1] == '-' && r[2] == '\0' && run)
1865             goto dorun;
1866
1867         /* find option in table */
1868         for(popt = tcc_options; ; ++popt) {
1869             const char *p1 = popt->name;
1870             const char *r1 = r + 1;
1871             if (p1 == NULL)
1872                 return tcc_error_noabort("invalid option -- '%s'", r);
1873             if (!strstart(p1, &r1))
1874                 continue;
1875             optarg = r1;
1876             if (popt->flags & TCC_OPTION_HAS_ARG) {
1877                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1878                     if (optind >= argc)
1879                 arg_err:
1880                         return tcc_error_noabort("argument to '%s' is missing", r);
1881                     optarg = argv[optind++];
1882                 }
1883             } else if (*r1 != '\0')
1884                 continue;
1885             break;
1886         }
1887
1888         switch(popt->index) {
1889         case TCC_OPTION_HELP:
1890             x = OPT_HELP;
1891             goto extra_action;
1892         case TCC_OPTION_HELP2:
1893             x = OPT_HELP2;
1894             goto extra_action;
1895         case TCC_OPTION_I:
1896             tcc_add_include_path(s, optarg);
1897             break;
1898         case TCC_OPTION_D:
1899             tcc_define_symbol(s, optarg, NULL);
1900             break;
1901         case TCC_OPTION_U:
1902             tcc_undefine_symbol(s, optarg);
1903             break;
1904         case TCC_OPTION_L:
1905             tcc_add_library_path(s, optarg);
1906             break;
1907         case TCC_OPTION_B:
1908             /* set tcc utilities path (mainly for tcc development) */
1909             tcc_set_lib_path(s, optarg);
1910             ++noaction;
1911             break;
1912         case TCC_OPTION_l:
1913             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1914             s->nb_libraries++;
1915             break;
1916         case TCC_OPTION_pthread:
1917             s->option_pthread = 1;
1918             break;
1919         case TCC_OPTION_bench:
1920             s->do_bench = 1;
1921             break;
1922 #ifdef CONFIG_TCC_BACKTRACE
1923         case TCC_OPTION_bt:
1924             s->rt_num_callers = atoi(optarg); /* zero = default (6) */
1925             goto enable_backtrace;
1926         enable_backtrace:
1927             s->do_backtrace = 1;
1928             s->do_debug = s->do_debug ? s->do_debug : 1;
1929             s->dwarf = DWARF_VERSION;
1930             break;
1931 #ifdef CONFIG_TCC_BCHECK
1932         case TCC_OPTION_b:
1933             s->do_bounds_check = 1;
1934             goto enable_backtrace;
1935 #endif
1936 #endif
1937         case TCC_OPTION_g:
1938             s->do_debug = 2;
1939             s->dwarf = DWARF_VERSION;
1940             if (strstart("dwarf", &optarg)) {
1941                 s->dwarf = (*optarg) ? (0 - atoi(optarg)) : DEFAULT_DWARF_VERSION;
1942             } else if (isnum(*optarg)) {
1943                 x = *optarg - '0';
1944                 /* -g0 = no info, -g1 = lines/functions only, -g2 = full info */
1945                 s->do_debug = x > 2 ? 2 : x == 0 && s->do_backtrace ? 1 : x;
1946 #ifdef TCC_TARGET_PE
1947             } else if (0 == strcmp(".pdb", optarg)) {
1948                 s->dwarf = 5, s->do_debug |= 16;
1949 #endif
1950             }
1951             break;
1952         case TCC_OPTION_c:
1953             x = TCC_OUTPUT_OBJ;
1954         set_output_type:
1955             if (s->output_type)
1956                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1957             s->output_type = x;
1958             break;
1959         case TCC_OPTION_d:
1960             if (*optarg == 'D')
1961                 s->dflag = 3;
1962             else if (*optarg == 'M')
1963                 s->dflag = 7;
1964             else if (*optarg == 't')
1965                 s->dflag = 16;
1966             else if (isnum(*optarg))
1967                 s->g_debug |= atoi(optarg);
1968             else
1969                 goto unsupported_option;
1970             break;
1971         case TCC_OPTION_static:
1972             s->static_link = 1;
1973             break;
1974         case TCC_OPTION_std:
1975             if (strcmp(optarg, "=c11") == 0)
1976                 s->cversion = 201112;
1977             break;
1978         case TCC_OPTION_shared:
1979             x = TCC_OUTPUT_DLL;
1980             goto set_output_type;
1981         case TCC_OPTION_soname:
1982             s->soname = tcc_strdup(optarg);
1983             break;
1984         case TCC_OPTION_o:
1985             if (s->outfile) {
1986                 tcc_warning("multiple -o option");
1987                 tcc_free(s->outfile);
1988             }
1989             s->outfile = tcc_strdup(optarg);
1990             break;
1991         case TCC_OPTION_r:
1992             /* generate a .o merging several output files */
1993             s->option_r = 1;
1994             x = TCC_OUTPUT_OBJ;
1995             goto set_output_type;
1996         case TCC_OPTION_isystem:
1997             tcc_add_sysinclude_path(s, optarg);
1998             break;
1999         case TCC_OPTION_include:
2000             cstr_printf(&s->cmdline_incl, "#include \"%s\"\n", optarg);
2001             break;
2002         case TCC_OPTION_nostdinc:
2003             s->nostdinc = 1;
2004             break;
2005         case TCC_OPTION_nostdlib:
2006             s->nostdlib = 1;
2007             break;
2008         case TCC_OPTION_run:
2009 #ifndef TCC_IS_NATIVE
2010             return tcc_error_noabort("-run is not available in a cross compiler");
2011 #else
2012             run = optarg;
2013             x = TCC_OUTPUT_MEMORY;
2014             goto set_output_type;
2015 #endif
2016         case TCC_OPTION_v:
2017             do ++s->verbose; while (*optarg++ == 'v');
2018             ++noaction;
2019             break;
2020         case TCC_OPTION_f:
2021             if (set_flag(s, options_f, optarg) < 0)
2022                 goto unsupported_option;
2023             break;
2024 #ifdef TCC_TARGET_ARM
2025         case TCC_OPTION_mfloat_abi:
2026             /* tcc doesn't support soft float yet */
2027             if (!strcmp(optarg, "softfp")) {
2028                 s->float_abi = ARM_SOFTFP_FLOAT;
2029             } else if (!strcmp(optarg, "hard"))
2030                 s->float_abi = ARM_HARD_FLOAT;
2031             else
2032                 return tcc_error_noabort("unsupported float abi '%s'", optarg);
2033             break;
2034 #endif
2035         case TCC_OPTION_m:
2036             if (set_flag(s, options_m, optarg) < 0) {
2037                 if (x = atoi(optarg), x != 32 && x != 64)
2038                     goto unsupported_option;
2039                 if (PTR_SIZE != x/8)
2040                     return x;
2041                 ++noaction;
2042             }
2043             break;
2044         case TCC_OPTION_W:
2045             s->warn_none = 0;
2046             if (optarg[0] && set_flag(s, options_W, optarg) < 0)
2047                 goto unsupported_option;
2048             break;
2049         case TCC_OPTION_w:
2050             s->warn_none = 1;
2051             break;
2052         case TCC_OPTION_rdynamic:
2053             s->rdynamic = 1;
2054             break;
2055         case TCC_OPTION_Wl:
2056             if (s->linker_arg.size)
2057                 ((char*)s->linker_arg.data)[s->linker_arg.size - 1] = ',';
2058             cstr_cat(&s->linker_arg, optarg, 0);
2059             x = tcc_set_linker(s, s->linker_arg.data);
2060             if (x)
2061                 cstr_reset(&s->linker_arg);
2062             if (x < 0)
2063                 return -1;
2064             break;
2065         case TCC_OPTION_Wp:
2066             r = optarg;
2067             goto reparse;
2068         case TCC_OPTION_E:
2069             x = TCC_OUTPUT_PREPROCESS;
2070             goto set_output_type;
2071         case TCC_OPTION_P:
2072             s->Pflag = atoi(optarg) + 1;
2073             break;
2074         case TCC_OPTION_M:
2075             s->include_sys_deps = 1;
2076             // fall through
2077         case TCC_OPTION_MM:
2078             s->just_deps = 1;
2079             if(!s->deps_outfile)
2080                 s->deps_outfile = tcc_strdup("-");
2081             // fall through
2082         case TCC_OPTION_MMD:
2083             s->gen_deps = 1;
2084             break;
2085         case TCC_OPTION_MD:
2086             s->gen_deps = 1;
2087             s->include_sys_deps = 1;
2088             break;
2089         case TCC_OPTION_MF:
2090             s->deps_outfile = tcc_strdup(optarg);
2091             break;
2092         case TCC_OPTION_MP:
2093             s->gen_phony_deps = 1;
2094             break;
2095         case TCC_OPTION_dumpmachine:
2096             printf("%s\n", dumpmachine_str);
2097             exit(0);
2098         case TCC_OPTION_dumpversion:
2099             printf ("%s\n", TCC_VERSION);
2100             exit(0);
2101         case TCC_OPTION_x:
2102             x = 0;
2103             if (*optarg == 'c')
2104                 x = AFF_TYPE_C;
2105             else if (*optarg == 'a')
2106                 x = AFF_TYPE_ASMPP;
2107             else if (*optarg == 'b')
2108                 x = AFF_TYPE_BIN;
2109             else if (*optarg == 'n')
2110                 x = AFF_TYPE_NONE;
2111             else
2112                 tcc_warning("unsupported language '%s'", optarg);
2113             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
2114             break;
2115         case TCC_OPTION_O:
2116             s->optimize = atoi(optarg);
2117             break;
2118         case TCC_OPTION_print_search_dirs:
2119             x = OPT_PRINT_DIRS;
2120             goto extra_action;
2121         case TCC_OPTION_impdef:
2122             x = OPT_IMPDEF;
2123             goto extra_action;
2124 #if defined TCC_TARGET_MACHO
2125         case TCC_OPTION_dynamiclib:
2126             x = TCC_OUTPUT_DLL;
2127             goto set_output_type;
2128         case TCC_OPTION_flat_namespace:
2129              break;
2130         case TCC_OPTION_two_levelnamespace:
2131              break;
2132         case TCC_OPTION_undefined:
2133              break;
2134         case TCC_OPTION_install_name:
2135             s->install_name = tcc_strdup(optarg);
2136             break;
2137         case TCC_OPTION_compatibility_version:
2138             s->compatibility_version = parse_version(s, optarg);
2139             break;
2140         case TCC_OPTION_current_version:
2141             s->current_version = parse_version(s, optarg);;
2142             break;
2143 #endif
2144         case TCC_OPTION_ar:
2145             x = OPT_AR;
2146         extra_action:
2147             arg_start = optind - 1;
2148             if (arg_start != noaction)
2149                 return tcc_error_noabort("cannot parse %s here", r);
2150             tool = x;
2151             break;
2152         default:
2153 unsupported_option:
2154             tcc_warning_c(warn_unsupported)("unsupported option '%s'", r);
2155             break;
2156         }
2157     }
2158     if (s->linker_arg.size) {
2159         r = s->linker_arg.data;
2160         goto arg_err;
2161     }
2162     *pargc = argc - arg_start;
2163     *pargv = argv + arg_start;
2164     if (tool)
2165         return tool;
2166     if (optind != noaction)
2167         return 0;
2168     if (s->verbose == 2)
2169         return OPT_PRINT_DIRS;
2170     if (s->verbose)
2171         return OPT_V;
2172     return OPT_HELP;
2173 }
2174
2175 LIBTCCAPI int tcc_set_options(TCCState *s, const char *r)
2176 {
2177     char **argv = NULL;
2178     int argc = 0, ret;
2179     args_parser_make_argv(r, &argc, &argv);
2180     ret = tcc_parse_args(s, &argc, &argv, 0);
2181     dynarray_reset(&argv, &argc);
2182     return ret < 0 ? ret : 0;
2183 }
2184
2185 PUB_FUNC void tcc_print_stats(TCCState *s1, unsigned total_time)
2186 {
2187     if (!total_time)
2188         total_time = 1;
2189     fprintf(stderr, "# %d idents, %d lines, %u bytes\n"
2190                     "# %0.3f s, %u lines/s, %0.1f MB/s\n",
2191            total_idents, total_lines, total_bytes,
2192            (double)total_time/1000,
2193            (unsigned)total_lines*1000/total_time,
2194            (double)total_bytes/1000/total_time);
2195     fprintf(stderr, "# text %u, data.rw %u, data.ro %u, bss %u bytes\n",
2196            s1->total_output[0],
2197            s1->total_output[1],
2198            s1->total_output[2],
2199            s1->total_output[3]
2200            );
2201 #ifdef MEM_DEBUG
2202     fprintf(stderr, "# memory usage");
2203 #ifdef TCC_IS_NATIVE
2204     if (s1->run_size) {
2205         Section *s = s1->symtab;
2206         int ms = s->data_offset + s->link->data_offset + s->hash->data_offset;
2207         fprintf(stderr, ": %d to run, %d symbols, %d other,",
2208             s1->run_size, ms, mem_cur_size - s1->run_size - ms);
2209     }
2210 #endif
2211     fprintf(stderr, " %d max (bytes)\n", mem_max_size);
2212 #endif
2213 }