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 #if 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 #include "i386-asm.c"
  48 #elif defined(TCC_TARGET_ARM)
  49 #include "arm-gen.c"
  50 #include "arm-link.c"
  51 #include "arm-asm.c"
  52 #elif defined(TCC_TARGET_ARM64)
  53 #include "arm64-gen.c"
  54 #include "arm64-link.c"
  55 #elif defined(TCC_TARGET_C67)
  56 #include "c67-gen.c"
  57 #include "c67-link.c"
  58 #include "tcccoff.c"
  59 #elif defined(TCC_TARGET_X86_64)
  60 #include "x86_64-gen.c"
  61 #include "x86_64-link.c"
  62 #include "i386-asm.c"
  63 #elif defined(TCC_TARGET_RISCV64)
  64 #include "riscv64-gen.c"
  65 #include "riscv64-link.c"
  66 #else
  67 #error unknown target
  68 #endif
  69 #ifdef CONFIG_TCC_ASM
  70 #include "tccasm.c"
  71 #endif
  72 #ifdef TCC_TARGET_PE
  73 #include "tccpe.c"
  74 #endif
  75 #endif /* ONE_SOURCE */
  76
  77 /********************************************************/
  78 #ifndef CONFIG_TCC_ASM
  79 ST_FUNC void asm_instr(void)
  80 {
  81     tcc_error("inline asm() not supported");
  82 }
  83 ST_FUNC void asm_global_instr(void)
  84 {
  85     tcc_error("inline asm() not supported");
  86 }
  87 #endif
  88
  89 /********************************************************/
  90 #ifdef _WIN32
  91 ST_FUNC char *normalize_slashes(char *path)
  92 {
  93     char *p;
  94     for (p = path; *p; ++p)
  95         if (*p == '\\')
  96             *p = '/';
  97     return path;
  98 }
  99
 100 static HMODULE tcc_module;
 101
 102 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 103 static void tcc_set_lib_path_w32(TCCState *s)
 104 {
 105     char path[1024], *p;
 106     GetModuleFileNameA(tcc_module, path, sizeof path);
 107     p = tcc_basename(normalize_slashes(strlwr(path)));
 108     if (p > path)
 109         --p;
 110     *p = 0;
 111     tcc_set_lib_path(s, path);
 112 }
 113
 114 #ifdef TCC_TARGET_PE
 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
 123 #ifdef LIBTCC_AS_DLL
 124 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 125 {
 126     if (DLL_PROCESS_ATTACH == dwReason)
 127         tcc_module = hDll;
 128     return TRUE;
 129 }
 130 #endif
 131 #endif
 132
 133 /********************************************************/
 134 /* copy a string and truncate it. */
 135 ST_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 136 {
 137     char *q, *q_end;
 138     int c;
 139
 140     if (buf_size > 0) {
 141         q = buf;
 142         q_end = buf + buf_size - 1;
 143         while (q < q_end) {
 144             c = *s++;
 145             if (c == '\0')
 146                 break;
 147             *q++ = c;
 148         }
 149         *q = '\0';
 150     }
 151     return buf;
 152 }
 153
 154 /* strcat and truncate. */
 155 ST_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 156 {
 157     int len;
 158     len = strlen(buf);
 159     if (len < buf_size)
 160         pstrcpy(buf + len, buf_size - len, s);
 161     return buf;
 162 }
 163
 164 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 165 {
 166     memcpy(out, in, num);
 167     out[num] = '\0';
 168     return out;
 169 }
 170
 171 /* extract the basename of a file */
 172 PUB_FUNC char *tcc_basename(const char *name)
 173 {
 174     char *p = strchr(name, 0);
 175     while (p > name && !IS_DIRSEP(p[-1]))
 176         --p;
 177     return p;
 178 }
 179
 180 /* extract extension part of a file
 181  *
 182  * (if no extension, return pointer to end-of-string)
 183  */
 184 PUB_FUNC char *tcc_fileextension (const char *name)
 185 {
 186     char *b = tcc_basename(name);
 187     char *e = strrchr(b, '.');
 188     return e ? e : strchr(b, 0);
 189 }
 190
 191 /********************************************************/
 192 /* memory management */
 193
 194 #undef free
 195 #undef malloc
 196 #undef realloc
 197
 198 #ifndef MEM_DEBUG
 199
 200 PUB_FUNC void tcc_free(void *ptr)
 201 {
 202     free(ptr);
 203 }
 204
 205 PUB_FUNC void *tcc_malloc(unsigned long size)
 206 {
 207     void *ptr;
 208     ptr = malloc(size);
 209     if (!ptr && size)
 210         tcc_error("memory full (malloc)");
 211     return ptr;
 212 }
 213
 214 PUB_FUNC void *tcc_mallocz(unsigned long size)
 215 {
 216     void *ptr;
 217     ptr = tcc_malloc(size);
 218     memset(ptr, 0, size);
 219     return ptr;
 220 }
 221
 222 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 223 {
 224     void *ptr1;
 225     ptr1 = realloc(ptr, size);
 226     if (!ptr1 && size)
 227         tcc_error("memory full (realloc)");
 228     return ptr1;
 229 }
 230
 231 PUB_FUNC char *tcc_strdup(const char *str)
 232 {
 233     char *ptr;
 234     ptr = tcc_malloc(strlen(str) + 1);
 235     strcpy(ptr, str);
 236     return ptr;
 237 }
 238
 239 PUB_FUNC void tcc_memcheck(void)
 240 {
 241 }
 242
 243 #else
 244
 245 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 246 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 247 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 248 #define MEM_DEBUG_FILE_LEN 40
 249 #define MEM_DEBUG_CHECK3(header) \
 250     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 251 #define MEM_USER_PTR(header) \
 252     ((char *)header + offsetof(mem_debug_header_t, magic3))
 253 #define MEM_HEADER_PTR(ptr) \
 254     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 255
 256 struct mem_debug_header {
 257     unsigned magic1;
 258     unsigned size;
 259     struct mem_debug_header *prev;
 260     struct mem_debug_header *next;
 261     int line_num;
 262     char file_name[MEM_DEBUG_FILE_LEN + 1];
 263     unsigned magic2;
 264     ALIGNED(16) unsigned magic3;
 265 };
 266
 267 typedef struct mem_debug_header mem_debug_header_t;
 268
 269 static mem_debug_header_t *mem_debug_chain;
 270 static unsigned mem_cur_size;
 271 static unsigned mem_max_size;
 272
 273 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 274 {
 275     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 276     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 277         header->magic2 != MEM_DEBUG_MAGIC2 ||
 278         MEM_DEBUG_CHECK3(header) != MEM_DEBUG_MAGIC3 ||
 279         header->size == (unsigned)-1) {
 280         fprintf(stderr, "%s check failed\n", msg);
 281         if (header->magic1 == MEM_DEBUG_MAGIC1)
 282             fprintf(stderr, "%s:%u: block allocated here.\n",
 283                 header->file_name, header->line_num);
 284         exit(1);
 285     }
 286     return header;
 287 }
 288
 289 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 290 {
 291     int ofs;
 292     mem_debug_header_t *header;
 293
 294     header = malloc(sizeof(mem_debug_header_t) + size);
 295     if (!header)
 296         tcc_error("memory full (malloc)");
 297
 298     header->magic1 = MEM_DEBUG_MAGIC1;
 299     header->magic2 = MEM_DEBUG_MAGIC2;
 300     header->size = size;
 301     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 302     header->line_num = line;
 303     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 304     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 305     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 306
 307     header->next = mem_debug_chain;
 308     header->prev = NULL;
 309     if (header->next)
 310         header->next->prev = header;
 311     mem_debug_chain = header;
 312
 313     mem_cur_size += size;
 314     if (mem_cur_size > mem_max_size)
 315         mem_max_size = mem_cur_size;
 316
 317     return MEM_USER_PTR(header);
 318 }
 319
 320 PUB_FUNC void tcc_free_debug(void *ptr)
 321 {
 322     mem_debug_header_t *header;
 323     if (!ptr)
 324         return;
 325     header = malloc_check(ptr, "tcc_free");
 326     mem_cur_size -= header->size;
 327     header->size = (unsigned)-1;
 328     if (header->next)
 329         header->next->prev = header->prev;
 330     if (header->prev)
 331         header->prev->next = header->next;
 332     if (header == mem_debug_chain)
 333         mem_debug_chain = header->next;
 334     free(header);
 335 }
 336
 337 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 338 {
 339     void *ptr;
 340     ptr = tcc_malloc_debug(size,file,line);
 341     memset(ptr, 0, size);
 342     return ptr;
 343 }
 344
 345 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 346 {
 347     mem_debug_header_t *header;
 348     int mem_debug_chain_update = 0;
 349     if (!ptr)
 350         return tcc_malloc_debug(size, file, line);
 351     header = malloc_check(ptr, "tcc_realloc");
 352     mem_cur_size -= header->size;
 353     mem_debug_chain_update = (header == mem_debug_chain);
 354     header = realloc(header, sizeof(mem_debug_header_t) + size);
 355     if (!header)
 356         tcc_error("memory full (realloc)");
 357     header->size = size;
 358     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 359     if (header->next)
 360         header->next->prev = header;
 361     if (header->prev)
 362         header->prev->next = header;
 363     if (mem_debug_chain_update)
 364         mem_debug_chain = header;
 365     mem_cur_size += size;
 366     if (mem_cur_size > mem_max_size)
 367         mem_max_size = mem_cur_size;
 368     return MEM_USER_PTR(header);
 369 }
 370
 371 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 372 {
 373     char *ptr;
 374     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 375     strcpy(ptr, str);
 376     return ptr;
 377 }
 378
 379 PUB_FUNC void tcc_memcheck(void)
 380 {
 381     if (mem_cur_size) {
 382         mem_debug_header_t *header = mem_debug_chain;
 383         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 384             mem_cur_size, mem_max_size);
 385         while (header) {
 386             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 387                 header->file_name, header->line_num, header->size);
 388             header = header->next;
 389         }
 390 #if MEM_DEBUG-0 == 2
 391         exit(2);
 392 #endif
 393     }
 394 }
 395 #endif /* MEM_DEBUG */
 396
 397 #define free(p) use_tcc_free(p)
 398 #define malloc(s) use_tcc_malloc(s)
 399 #define realloc(p, s) use_tcc_realloc(p, s)
 400
 401 /********************************************************/
 402 /* dynarrays */
 403
 404 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 405 {
 406     int nb, nb_alloc;
 407     void **pp;
 408
 409     nb = *nb_ptr;
 410     pp = *(void ***)ptab;
 411     /* every power of two we double array size */
 412     if ((nb & (nb - 1)) == 0) {
 413         if (!nb)
 414             nb_alloc = 1;
 415         else
 416             nb_alloc = nb * 2;
 417         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 418         *(void***)ptab = pp;
 419     }
 420     pp[nb++] = data;
 421     *nb_ptr = nb;
 422 }
 423
 424 ST_FUNC void dynarray_reset(void *pp, int *n)
 425 {
 426     void **p;
 427     for (p = *(void***)pp; *n; ++p, --*n)
 428         if (*p)
 429             tcc_free(*p);
 430     tcc_free(*(void**)pp);
 431     *(void**)pp = NULL;
 432 }
 433
 434 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 435 {
 436     const char *p;
 437     do {
 438         int c;
 439         CString str;
 440
 441         cstr_new(&str);
 442         for (p = in; c = *p, c != '\0' && c != PATHSEP[0]; ++p) {
 443             if (c == '{' && p[1] && p[2] == '}') {
 444                 c = p[1], p += 2;
 445                 if (c == 'B')
 446                     cstr_cat(&str, s->tcc_lib_path, -1);
 447             } else {
 448                 cstr_ccat(&str, c);
 449             }
 450         }
 451         if (str.size) {
 452             cstr_ccat(&str, '\0');
 453             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 454         }
 455         cstr_free(&str);
 456         in = p+1;
 457     } while (*p);
 458 }
 459
 460 /********************************************************/
 461
 462 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 463 {
 464     int len;
 465     len = strlen(buf);
 466     vsnprintf(buf + len, buf_size - len, fmt, ap);
 467 }
 468
 469 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 470 {
 471     va_list ap;
 472     va_start(ap, fmt);
 473     strcat_vprintf(buf, buf_size, fmt, ap);
 474     va_end(ap);
 475 }
 476
 477 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 478 {
 479     char buf[2048];
 480     BufferedFile **pf, *f;
 481
 482     buf[0] = '\0';
 483     /* use upper file if inline ":asm:" or token ":paste:" */
 484     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 485      ;
 486     if (f) {
 487         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 488             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 489                 (*pf)->filename, (*pf)->line_num);
 490         if (s1->error_set_jmp_enabled) {
 491             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 492                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 493         } else {
 494             strcat_printf(buf, sizeof(buf), "%s: ",
 495                 f->filename);
 496         }
 497     } else {
 498         strcat_printf(buf, sizeof(buf), "tcc: ");
 499     }
 500     if (is_warning)
 501         strcat_printf(buf, sizeof(buf), "warning: ");
 502     else
 503         strcat_printf(buf, sizeof(buf), "error: ");
 504     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 505
 506     if (!s1->error_func) {
 507         /* default case: stderr */
 508         if (s1->output_type == TCC_OUTPUT_PREPROCESS && s1->ppfp == stdout)
 509             /* print a newline during tcc -E */
 510             printf("\n"), fflush(stdout);
 511         fflush(stdout); /* flush -v output */
 512         fprintf(stderr, "%s\n", buf);
 513         fflush(stderr); /* print error/warning now (win32) */
 514     } else {
 515         s1->error_func(s1->error_opaque, buf);
 516     }
 517     if (!is_warning || s1->warn_error)
 518         s1->nb_errors++;
 519 }
 520
 521 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque, TCCErrorFunc error_func)
 522 {
 523     s->error_opaque = error_opaque;
 524     s->error_func = error_func;
 525 }
 526
 527 LIBTCCAPI TCCErrorFunc tcc_get_error_func(TCCState *s)
 528 {
 529     return s->error_func;
 530 }
 531
 532 LIBTCCAPI void *tcc_get_error_opaque(TCCState *s)
 533 {
 534     return s->error_opaque;
 535 }
 536
 537 /* error without aborting current compilation */
 538 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 539 {
 540     TCCState *s1 = tcc_state;
 541     va_list ap;
 542
 543     va_start(ap, fmt);
 544     error1(s1, 0, fmt, ap);
 545     va_end(ap);
 546 }
 547
 548 PUB_FUNC void tcc_error(const char *fmt, ...)
 549 {
 550     TCCState *s1 = tcc_state;
 551     va_list ap;
 552
 553     va_start(ap, fmt);
 554     error1(s1, 0, fmt, ap);
 555     va_end(ap);
 556     /* better than nothing: in some cases, we accept to handle errors */
 557     if (s1->error_set_jmp_enabled) {
 558         longjmp(s1->error_jmp_buf, 1);
 559     } else {
 560         /* XXX: eliminate this someday */
 561         exit(1);
 562     }
 563 }
 564
 565 PUB_FUNC void tcc_warning(const char *fmt, ...)
 566 {
 567     TCCState *s1 = tcc_state;
 568     va_list ap;
 569
 570     if (s1->warn_none)
 571         return;
 572
 573     va_start(ap, fmt);
 574     error1(s1, 1, fmt, ap);
 575     va_end(ap);
 576 }
 577
 578 /********************************************************/
 579 /* I/O layer */
 580
 581 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 582 {
 583     BufferedFile *bf;
 584     int buflen = initlen ? initlen : IO_BUF_SIZE;
 585
 586     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 587     bf->buf_ptr = bf->buffer;
 588     bf->buf_end = bf->buffer + initlen;
 589     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 590     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 591     bf->true_filename = bf->filename;
 592     bf->line_num = 1;
 593     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 594     bf->fd = -1;
 595     bf->prev = file;
 596     file = bf;
 597     tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 598 }
 599
 600 ST_FUNC void tcc_close(void)
 601 {
 602     BufferedFile *bf = file;
 603     if (bf->fd > 0) {
 604         close(bf->fd);
 605         total_lines += bf->line_num;
 606     }
 607     if (bf->true_filename != bf->filename)
 608         tcc_free(bf->true_filename);
 609     file = bf->prev;
 610     tcc_free(bf);
 611 }
 612
 613 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 614 {
 615     int fd;
 616     if (strcmp(filename, "-") == 0)
 617         fd = 0, filename = "<stdin>";
 618     else
 619         fd = open(filename, O_RDONLY | O_BINARY);
 620     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 621         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 622                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 623     if (fd < 0)
 624         return -1;
 625     tcc_open_bf(s1, filename, 0);
 626 #ifdef _WIN32
 627     normalize_slashes(file->filename);
 628 #endif
 629     file->fd = fd;
 630     return fd;
 631 }
 632
 633 /* compile the file opened in 'file'. Return non zero if errors. */
 634 static int tcc_compile(TCCState *s1, int filetype)
 635 {
 636     Sym *define_start;
 637     int is_asm;
 638
 639     define_start = define_stack;
 640     is_asm = !!(filetype & (AFF_TYPE_ASM|AFF_TYPE_ASMPP));
 641     tccelf_begin_file(s1);
 642
 643     if (setjmp(s1->error_jmp_buf) == 0) {
 644         s1->nb_errors = 0;
 645         s1->error_set_jmp_enabled = 1;
 646
 647         preprocess_start(s1, is_asm);
 648         if (s1->output_type == TCC_OUTPUT_PREPROCESS) {
 649             tcc_preprocess(s1);
 650         } else if (is_asm) {
 651 #ifdef CONFIG_TCC_ASM
 652             tcc_assemble(s1, !!(filetype & AFF_TYPE_ASMPP));
 653 #else
 654             tcc_error_noabort("asm not supported");
 655 #endif
 656         } else {
 657             tccgen_compile(s1);
 658         }
 659     }
 660     s1->error_set_jmp_enabled = 0;
 661
 662     preprocess_end(s1);
 663     free_inline_functions(s1);
 664     /* reset define stack, but keep -D and built-ins */
 665     free_defines(define_start);
 666     sym_pop(&global_stack, NULL, 0);
 667     sym_pop(&local_stack, NULL, 0);
 668     tccelf_end_file(s1);
 669     return s1->nb_errors != 0 ? -1 : 0;
 670 }
 671
 672 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 673 {
 674     int len, ret;
 675
 676     len = strlen(str);
 677     tcc_open_bf(s, "<string>", len);
 678     memcpy(file->buffer, str, len);
 679     ret = tcc_compile(s, s->filetype);
 680     tcc_close();
 681     return ret;
 682 }
 683
 684 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 685 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 686 {
 687     int len1, len2;
 688     /* default value */
 689     if (!value)
 690         value = "1";
 691     len1 = strlen(sym);
 692     len2 = strlen(value);
 693
 694     /* init file structure */
 695     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 696     memcpy(file->buffer, sym, len1);
 697     file->buffer[len1] = ' ';
 698     memcpy(file->buffer + len1 + 1, value, len2);
 699
 700     /* parse with define parser */
 701     next_nomacro();
 702     parse_define();
 703     tcc_close();
 704 }
 705
 706 /* undefine a preprocessor symbol */
 707 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 708 {
 709     TokenSym *ts;
 710     Sym *s;
 711     ts = tok_alloc(sym, strlen(sym));
 712     s = define_find(ts->tok);
 713     if (s) {
 714         define_undef(s);
 715         tok_str_free_str(s->d);
 716         s->d = NULL;
 717     }
 718 }
 719
 720 /* cleanup all static data used during compilation */
 721 static void tcc_cleanup(void)
 722 {
 723     if (NULL == tcc_state)
 724         return;
 725     while (file)
 726         tcc_close();
 727     tccpp_delete(tcc_state);
 728     tcc_state = NULL;
 729     /* free sym_pools */
 730     dynarray_reset(&sym_pools, &nb_sym_pools);
 731     /* reset symbol stack */
 732     sym_free_first = NULL;
 733 }
 734
 735 LIBTCCAPI TCCState *tcc_new(void)
 736 {
 737     TCCState *s;
 738
 739     tcc_cleanup();
 740
 741     s = tcc_mallocz(sizeof(TCCState));
 742     if (!s)
 743         return NULL;
 744     tcc_state = s;
 745     ++nb_states;
 746
 747     s->nocommon = 1;
 748     s->dollars_in_identifiers = 1; /*on by default like in gcc/clang*/
 749     s->cversion = 199901; /* default unless -std=c11 is supplied */
 750     s->warn_implicit_function_declaration = 1;
 751     s->ms_extensions = 1;
 752
 753 #ifdef CHAR_IS_UNSIGNED
 754     s->char_is_unsigned = 1;
 755 #endif
 756 #ifdef TCC_TARGET_I386
 757     s->seg_size = 32;
 758 #endif
 759     /* enable this if you want symbols with leading underscore on windows: */
 760 #if 0 /* def TCC_TARGET_PE */
 761     s->leading_underscore = 1;
 762 #endif
 763 #ifdef _WIN32
 764     tcc_set_lib_path_w32(s);
 765 #else
 766     tcc_set_lib_path(s, CONFIG_TCCDIR);
 767 #endif
 768     tccelf_new(s);
 769     tccpp_new(s);
 770
 771     /* we add dummy defines for some special macros to speed up tests
 772        and to have working defined() */
 773     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 774     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 775     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 776     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 777     define_push(TOK___COUNTER__, MACRO_OBJ, NULL, NULL);
 778     {
 779         /* define __TINYC__ 92X  */
 780         char buffer[32]; int a,b,c;
 781         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 782         sprintf(buffer, "%d", a*10000 + b*100 + c);
 783         tcc_define_symbol(s, "__TINYC__", buffer);
 784     }
 785
 786     /* standard defines */
 787     tcc_define_symbol(s, "__STDC__", NULL);
 788     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 789     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 790
 791     /* target defines */
 792 #if defined(TCC_TARGET_I386)
 793     tcc_define_symbol(s, "__i386__", NULL);
 794     tcc_define_symbol(s, "__i386", NULL);
 795     tcc_define_symbol(s, "i386", NULL);
 796 #elif defined(TCC_TARGET_X86_64)
 797     tcc_define_symbol(s, "__x86_64__", NULL);
 798 #elif defined(TCC_TARGET_ARM)
 799     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 800     tcc_define_symbol(s, "__arm_elf__", NULL);
 801     tcc_define_symbol(s, "__arm_elf", NULL);
 802     tcc_define_symbol(s, "arm_elf", NULL);
 803     tcc_define_symbol(s, "__arm__", NULL);
 804     tcc_define_symbol(s, "__arm", NULL);
 805     tcc_define_symbol(s, "arm", NULL);
 806     tcc_define_symbol(s, "__APCS_32__", NULL);
 807     tcc_define_symbol(s, "__ARMEL__", NULL);
 808 #if defined(TCC_ARM_EABI)
 809     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 810 #endif
 811 #if defined(TCC_ARM_HARDFLOAT)
 812     s->float_abi = ARM_HARD_FLOAT;
 813     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 814 #else
 815     s->float_abi = ARM_SOFTFP_FLOAT;
 816 #endif
 817 #elif defined(TCC_TARGET_ARM64)
 818     tcc_define_symbol(s, "__aarch64__", NULL);
 819 #elif defined TCC_TARGET_C67
 820     tcc_define_symbol(s, "__C67__", NULL);
 821 #elif defined TCC_TARGET_RISCV64
 822     tcc_define_symbol(s, "__riscv", NULL);
 823     tcc_define_symbol(s, "__riscv_xlen", "64");
 824     tcc_define_symbol(s, "__riscv_flen", "64");
 825     tcc_define_symbol(s, "__riscv_div", NULL);
 826     tcc_define_symbol(s, "__riscv_mul", NULL);
 827     tcc_define_symbol(s, "__riscv_fdiv", NULL);
 828     tcc_define_symbol(s, "__riscv_fsqrt", NULL);
 829     tcc_define_symbol(s, "__riscv_float_abi_double", NULL);
 830 #endif
 831
 832 #ifdef TCC_TARGET_PE
 833     tcc_define_symbol(s, "_WIN32", NULL);
 834 # ifdef TCC_TARGET_X86_64
 835     tcc_define_symbol(s, "_WIN64", NULL);
 836 # endif
 837 #else
 838     tcc_define_symbol(s, "__unix__", NULL);
 839     tcc_define_symbol(s, "__unix", NULL);
 840     tcc_define_symbol(s, "unix", NULL);
 841 # if defined(__linux__)
 842     tcc_define_symbol(s, "__linux__", NULL);
 843     tcc_define_symbol(s, "__linux", NULL);
 844 # endif
 845 # if defined(__FreeBSD__)
 846     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 847     /* No 'Thread Storage Local' on FreeBSD with tcc */
 848     tcc_define_symbol(s, "__NO_TLS", NULL);
 849 # endif
 850 # if defined(__FreeBSD_kernel__)
 851     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 852 # endif
 853 # if defined(__NetBSD__)
 854     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 855 # endif
 856 # if defined(__OpenBSD__)
 857     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 858 # endif
 859 #endif
 860
 861     /* TinyCC & gcc defines */
 862 #if PTR_SIZE == 4
 863     /* 32bit systems. */
 864     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
 865     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
 866     tcc_define_symbol(s, "__ILP32__", NULL);
 867 #elif LONG_SIZE == 4
 868     /* 64bit Windows. */
 869     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 870     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 871     tcc_define_symbol(s, "__LLP64__", NULL);
 872 #else
 873     /* Other 64bit systems. */
 874     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 875     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 876     tcc_define_symbol(s, "__LP64__", NULL);
 877 #endif
 878     tcc_define_symbol(s, "__SIZEOF_POINTER__", PTR_SIZE == 4 ? "4" : "8");
 879
 880 #ifdef TCC_TARGET_PE
 881     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 882     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 883 #else
 884     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 885     /* wint_t is unsigned int by default, but (signed) int on BSDs
 886        and unsigned short on windows.  Other OSes might have still
 887        other conventions, sigh.  */
 888 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 889   || defined(__NetBSD__) || defined(__OpenBSD__)
 890     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 891 #  ifdef __FreeBSD__
 892     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 893        that are unconditionally used in FreeBSDs other system headers :/ */
 894     tcc_define_symbol(s, "__GNUC__", "2");
 895     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 896     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 897 #  endif
 898 # else
 899     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 900     /* glibc defines */
 901     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 902         "name proto __asm__ (#alias)");
 903     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 904         "name proto __asm__ (#alias) __THROW");
 905 # endif
 906 # if defined(TCC_MUSL)
 907     tcc_define_symbol(s, "__DEFINED_va_list", "");
 908     tcc_define_symbol(s, "__DEFINED___isoc_va_list", "");
 909     tcc_define_symbol(s, "__isoc_va_list", "void *");
 910 # endif /* TCC_MUSL */
 911     /* Some GCC builtins that are simple to express as macros.  */
 912     tcc_define_symbol(s, "__builtin_extract_return_addr(x)", "x");
 913 #endif /* ndef TCC_TARGET_PE */
 914     return s;
 915 }
 916
 917 LIBTCCAPI void tcc_delete(TCCState *s1)
 918 {
 919     tcc_cleanup();
 920
 921     /* free sections */
 922     tccelf_delete(s1);
 923
 924     /* free library paths */
 925     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 926     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 927
 928     /* free include paths */
 929     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
 930     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 931     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 932     dynarray_reset(&s1->cmd_include_files, &s1->nb_cmd_include_files);
 933
 934     tcc_free(s1->tcc_lib_path);
 935     tcc_free(s1->soname);
 936     tcc_free(s1->rpath);
 937     tcc_free(s1->init_symbol);
 938     tcc_free(s1->fini_symbol);
 939     tcc_free(s1->outfile);
 940     tcc_free(s1->deps_outfile);
 941     dynarray_reset(&s1->files, &s1->nb_files);
 942     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 943     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 944     dynarray_reset(&s1->argv, &s1->argc);
 945
 946 #ifdef TCC_IS_NATIVE
 947     /* free runtime memory */
 948     tcc_run_free(s1);
 949 #endif
 950
 951     tcc_free(s1);
 952     if (0 == --nb_states)
 953         tcc_memcheck();
 954 }
 955
 956 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 957 {
 958     s->output_type = output_type;
 959
 960     /* always elf for objects */
 961     if (output_type == TCC_OUTPUT_OBJ)
 962         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 963
 964     if (s->char_is_unsigned)
 965         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 966
 967     if (!s->nostdinc) {
 968         /* default include paths */
 969         /* -isystem paths have already been handled */
 970         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 971     }
 972
 973 #ifdef CONFIG_TCC_BCHECK
 974     if (s->do_bounds_check) {
 975         /* if bound checking, then add corresponding sections */
 976         tccelf_bounds_new(s);
 977         /* define symbol */
 978         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 979     }
 980 #endif
 981     if (s->do_debug) {
 982         /* add debug sections */
 983         tccelf_stab_new(s);
 984     }
 985
 986     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 987
 988 #ifdef TCC_TARGET_PE
 989 # ifdef _WIN32
 990     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
 991         tcc_add_systemdir(s);
 992 # endif
 993 #else
 994     /* paths for crt objects */
 995     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 996     /* add libc crt1/crti objects */
 997     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
 998         !s->nostdlib) {
 999         if (output_type != TCC_OUTPUT_DLL)
1000             tcc_add_crt(s, "crt1.o");
1001         tcc_add_crt(s, "crti.o");
1002     }
1003 #endif
1004     return 0;
1005 }
1006
1007 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1008 {
1009     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
1010     return 0;
1011 }
1012
1013 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1014 {
1015     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1016     return 0;
1017 }
1018
1019 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1020 {
1021     int ret;
1022
1023     /* open the file */
1024     ret = tcc_open(s1, filename);
1025     if (ret < 0) {
1026         if (flags & AFF_PRINT_ERROR)
1027             tcc_error_noabort("file '%s' not found", filename);
1028         return ret;
1029     }
1030
1031     /* update target deps */
1032     dynarray_add(&s1->target_deps, &s1->nb_target_deps,
1033             tcc_strdup(filename));
1034
1035     if (flags & AFF_TYPE_BIN) {
1036         ElfW(Ehdr) ehdr;
1037         int fd, obj_type;
1038
1039         fd = file->fd;
1040         obj_type = tcc_object_type(fd, &ehdr);
1041         lseek(fd, 0, SEEK_SET);
1042
1043 #ifdef TCC_TARGET_MACHO
1044         if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), ".dylib"))
1045             obj_type = AFF_BINTYPE_DYN;
1046 #endif
1047
1048         switch (obj_type) {
1049         case AFF_BINTYPE_REL:
1050             ret = tcc_load_object_file(s1, fd, 0);
1051             break;
1052 #ifndef TCC_TARGET_PE
1053         case AFF_BINTYPE_DYN:
1054             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1055                 ret = 0;
1056 #ifdef TCC_IS_NATIVE
1057                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1058                     ret = -1;
1059 #endif
1060             } else {
1061                 ret = tcc_load_dll(s1, fd, filename,
1062                                    (flags & AFF_REFERENCED_DLL) != 0);
1063             }
1064             break;
1065 #endif
1066         case AFF_BINTYPE_AR:
1067             ret = tcc_load_archive(s1, fd, !(flags & AFF_WHOLE_ARCHIVE));
1068             break;
1069 #ifdef TCC_TARGET_COFF
1070         case AFF_BINTYPE_C67:
1071             ret = tcc_load_coff(s1, fd);
1072             break;
1073 #endif
1074         default:
1075 #ifdef TCC_TARGET_PE
1076             ret = pe_load_file(s1, filename, fd);
1077 #else
1078             /* as GNU ld, consider it is an ld script if not recognized */
1079             ret = tcc_load_ldscript(s1);
1080 #endif
1081             if (ret < 0)
1082                 tcc_error_noabort("unrecognized file type");
1083             break;
1084         }
1085     } else {
1086         ret = tcc_compile(s1, flags);
1087     }
1088     tcc_close();
1089     return ret;
1090 }
1091
1092 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1093 {
1094     int filetype = s->filetype;
1095     if (0 == (filetype & AFF_TYPE_MASK)) {
1096         /* use a file extension to detect a filetype */
1097         const char *ext = tcc_fileextension(filename);
1098         if (ext[0]) {
1099             ext++;
1100             if (!strcmp(ext, "S"))
1101                 filetype = AFF_TYPE_ASMPP;
1102             else if (!strcmp(ext, "s"))
1103                 filetype = AFF_TYPE_ASM;
1104             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1105                 filetype = AFF_TYPE_C;
1106             else
1107                 filetype |= AFF_TYPE_BIN;
1108         } else {
1109             filetype = AFF_TYPE_C;
1110         }
1111     }
1112     return tcc_add_file_internal(s, filename, filetype | AFF_PRINT_ERROR);
1113 }
1114
1115 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1116 {
1117     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1118     return 0;
1119 }
1120
1121 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1122     const char *filename, int flags, char **paths, int nb_paths)
1123 {
1124     char buf[1024];
1125     int i;
1126
1127     for(i = 0; i < nb_paths; i++) {
1128         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1129         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1130             return 0;
1131     }
1132     return -1;
1133 }
1134
1135 /* find and load a dll. Return non zero if not found */
1136 /* XXX: add '-rpath' option support ? */
1137 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1138 {
1139     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1140         s->library_paths, s->nb_library_paths);
1141 }
1142
1143 #ifndef TCC_TARGET_PE
1144 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1145 {
1146     if (-1 == tcc_add_library_internal(s, "%s/%s",
1147         filename, 0, s->crt_paths, s->nb_crt_paths))
1148         tcc_error_noabort("file '%s' not found", filename);
1149     return 0;
1150 }
1151 #endif
1152
1153 /* the library name is the same as the argument of the '-l' option */
1154 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1155 {
1156 #if defined TCC_TARGET_PE
1157     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1158     const char **pp = s->static_link ? libs + 4 : libs;
1159 #elif defined TCC_TARGET_MACHO
1160     const char *libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
1161     const char **pp = s->static_link ? libs + 1 : libs;
1162 #else
1163     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1164     const char **pp = s->static_link ? libs + 1 : libs;
1165 #endif
1166     int flags = s->filetype & AFF_WHOLE_ARCHIVE;
1167     while (*pp) {
1168         if (0 == tcc_add_library_internal(s, *pp,
1169             libraryname, flags, s->library_paths, s->nb_library_paths))
1170             return 0;
1171         ++pp;
1172     }
1173     return -1;
1174 }
1175
1176 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1177 {
1178     int ret = tcc_add_library(s, libname);
1179     if (ret < 0)
1180         tcc_error_noabort("library '%s' not found", libname);
1181     return ret;
1182 }
1183
1184 /* handle #pragma comment(lib,) */
1185 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1186 {
1187     int i;
1188     for (i = 0; i < s1->nb_pragma_libs; i++)
1189         tcc_add_library_err(s1, s1->pragma_libs[i]);
1190 }
1191
1192 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1193 {
1194 #ifdef TCC_TARGET_PE
1195     /* On x86_64 'val' might not be reachable with a 32bit offset.
1196        So it is handled here as if it were in a DLL. */
1197     pe_putimport(s, 0, name, (uintptr_t)val);
1198 #else
1199     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1200         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1201         SHN_ABS, name);
1202 #endif
1203     return 0;
1204 }
1205
1206 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1207 {
1208     tcc_free(s->tcc_lib_path);
1209     s->tcc_lib_path = tcc_strdup(path);
1210 }
1211
1212 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1213 #define FD_INVERT 0x0002 /* invert value before storing */
1214
1215 typedef struct FlagDef {
1216     uint16_t offset;
1217     uint16_t flags;
1218     const char *name;
1219 } FlagDef;
1220
1221 static int no_flag(const char **pp)
1222 {
1223     const char *p = *pp;
1224     if (*p != 'n' || *++p != 'o' || *++p != '-')
1225         return 0;
1226     *pp = p + 1;
1227     return 1;
1228 }
1229
1230 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1231 {
1232     int value, ret;
1233     const FlagDef *p;
1234     const char *r;
1235
1236     value = 1;
1237     r = name;
1238     if (no_flag(&r))
1239         value = 0;
1240
1241     for (ret = -1, p = flags; p->name; ++p) {
1242         if (ret) {
1243             if (strcmp(r, p->name))
1244                 continue;
1245         } else {
1246             if (0 == (p->flags & WD_ALL))
1247                 continue;
1248         }
1249         if (p->offset) {
1250             *(int*)((char *)s + p->offset) =
1251                 p->flags & FD_INVERT ? !value : value;
1252             if (ret)
1253                 return 0;
1254         } else {
1255             ret = 0;
1256         }
1257     }
1258     return ret;
1259 }
1260
1261 static int strstart(const char *val, const char **str)
1262 {
1263     const char *p, *q;
1264     p = *str;
1265     q = val;
1266     while (*q) {
1267         if (*p != *q)
1268             return 0;
1269         p++;
1270         q++;
1271     }
1272     *str = p;
1273     return 1;
1274 }
1275
1276 /* Like strstart, but automatically takes into account that ld options can
1277  *
1278  * - start with double or single dash (e.g. '--soname' or '-soname')
1279  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1280  *   or '-Wl,-soname=x.so')
1281  *
1282  * you provide `val` always in 'option[=]' form (no leading -)
1283  */
1284 static int link_option(const char *str, const char *val, const char **ptr)
1285 {
1286     const char *p, *q;
1287     int ret;
1288
1289     /* there should be 1 or 2 dashes */
1290     if (*str++ != '-')
1291         return 0;
1292     if (*str == '-')
1293         str++;
1294
1295     /* then str & val should match (potentially up to '=') */
1296     p = str;
1297     q = val;
1298
1299     ret = 1;
1300     if (q[0] == '?') {
1301         ++q;
1302         if (no_flag(&p))
1303             ret = -1;
1304     }
1305
1306     while (*q != '\0' && *q != '=') {
1307         if (*p != *q)
1308             return 0;
1309         p++;
1310         q++;
1311     }
1312
1313     /* '=' near eos means ',' or '=' is ok */
1314     if (*q == '=') {
1315         if (*p == 0)
1316             *ptr = p;
1317         if (*p != ',' && *p != '=')
1318             return 0;
1319         p++;
1320     } else if (*p) {
1321         return 0;
1322     }
1323     *ptr = p;
1324     return ret;
1325 }
1326
1327 static const char *skip_linker_arg(const char **str)
1328 {
1329     const char *s1 = *str;
1330     const char *s2 = strchr(s1, ',');
1331     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1332     return s2;
1333 }
1334
1335 static void copy_linker_arg(char **pp, const char *s, int sep)
1336 {
1337     const char *q = s;
1338     char *p = *pp;
1339     int l = 0;
1340     if (p && sep)
1341         p[l = strlen(p)] = sep, ++l;
1342     skip_linker_arg(&q);
1343     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1344 }
1345
1346 /* set linker options */
1347 static int tcc_set_linker(TCCState *s, const char *option)
1348 {
1349     while (*option) {
1350
1351         const char *p = NULL;
1352         char *end = NULL;
1353         int ignoring = 0;
1354         int ret;
1355
1356         if (link_option(option, "Bsymbolic", &p)) {
1357             s->symbolic = 1;
1358         } else if (link_option(option, "nostdlib", &p)) {
1359             s->nostdlib = 1;
1360         } else if (link_option(option, "fini=", &p)) {
1361             copy_linker_arg(&s->fini_symbol, p, 0);
1362             ignoring = 1;
1363         } else if (link_option(option, "image-base=", &p)
1364                 || link_option(option, "Ttext=", &p)) {
1365             s->text_addr = strtoull(p, &end, 16);
1366             s->has_text_addr = 1;
1367         } else if (link_option(option, "init=", &p)) {
1368             copy_linker_arg(&s->init_symbol, p, 0);
1369             ignoring = 1;
1370         } else if (link_option(option, "oformat=", &p)) {
1371 #if defined(TCC_TARGET_PE)
1372             if (strstart("pe-", &p)) {
1373 #elif PTR_SIZE == 8
1374             if (strstart("elf64-", &p)) {
1375 #else
1376             if (strstart("elf32-", &p)) {
1377 #endif
1378                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1379             } else if (!strcmp(p, "binary")) {
1380                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1381 #ifdef TCC_TARGET_COFF
1382             } else if (!strcmp(p, "coff")) {
1383                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1384 #endif
1385             } else
1386                 goto err;
1387
1388         } else if (link_option(option, "as-needed", &p)) {
1389             ignoring = 1;
1390         } else if (link_option(option, "O", &p)) {
1391             ignoring = 1;
1392         } else if (link_option(option, "export-all-symbols", &p)) {
1393             s->rdynamic = 1;
1394         } else if (link_option(option, "export-dynamic", &p)) {
1395             s->rdynamic = 1;
1396         } else if (link_option(option, "rpath=", &p)) {
1397             copy_linker_arg(&s->rpath, p, ':');
1398         } else if (link_option(option, "enable-new-dtags", &p)) {
1399             s->enable_new_dtags = 1;
1400         } else if (link_option(option, "section-alignment=", &p)) {
1401             s->section_align = strtoul(p, &end, 16);
1402         } else if (link_option(option, "soname=", &p)) {
1403             copy_linker_arg(&s->soname, p, 0);
1404 #ifdef TCC_TARGET_PE
1405         } else if (link_option(option, "large-address-aware", &p)) {
1406             s->pe_characteristics |= 0x20;
1407         } else if (link_option(option, "file-alignment=", &p)) {
1408             s->pe_file_align = strtoul(p, &end, 16);
1409         } else if (link_option(option, "stack=", &p)) {
1410             s->pe_stack_size = strtoul(p, &end, 10);
1411         } else if (link_option(option, "subsystem=", &p)) {
1412 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1413             if (!strcmp(p, "native")) {
1414                 s->pe_subsystem = 1;
1415             } else if (!strcmp(p, "console")) {
1416                 s->pe_subsystem = 3;
1417             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1418                 s->pe_subsystem = 2;
1419             } else if (!strcmp(p, "posix")) {
1420                 s->pe_subsystem = 7;
1421             } else if (!strcmp(p, "efiapp")) {
1422                 s->pe_subsystem = 10;
1423             } else if (!strcmp(p, "efiboot")) {
1424                 s->pe_subsystem = 11;
1425             } else if (!strcmp(p, "efiruntime")) {
1426                 s->pe_subsystem = 12;
1427             } else if (!strcmp(p, "efirom")) {
1428                 s->pe_subsystem = 13;
1429 #elif defined(TCC_TARGET_ARM)
1430             if (!strcmp(p, "wince")) {
1431                 s->pe_subsystem = 9;
1432 #endif
1433             } else
1434                 goto err;
1435 #endif
1436         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1437             if (ret > 0)
1438                 s->filetype |= AFF_WHOLE_ARCHIVE;
1439             else
1440                 s->filetype &= ~AFF_WHOLE_ARCHIVE;
1441         } else if (p) {
1442             return 0;
1443         } else {
1444     err:
1445             tcc_error("unsupported linker option '%s'", option);
1446         }
1447
1448         if (ignoring && s->warn_unsupported)
1449             tcc_warning("unsupported linker option '%s'", option);
1450
1451         option = skip_linker_arg(&p);
1452     }
1453     return 1;
1454 }
1455
1456 typedef struct TCCOption {
1457     const char *name;
1458     uint16_t index;
1459     uint16_t flags;
1460 } TCCOption;
1461
1462 enum {
1463     TCC_OPTION_HELP,
1464     TCC_OPTION_HELP2,
1465     TCC_OPTION_v,
1466     TCC_OPTION_I,
1467     TCC_OPTION_D,
1468     TCC_OPTION_U,
1469     TCC_OPTION_P,
1470     TCC_OPTION_L,
1471     TCC_OPTION_B,
1472     TCC_OPTION_l,
1473     TCC_OPTION_bench,
1474     TCC_OPTION_bt,
1475     TCC_OPTION_b,
1476     TCC_OPTION_g,
1477     TCC_OPTION_c,
1478     TCC_OPTION_dumpversion,
1479     TCC_OPTION_d,
1480     TCC_OPTION_static,
1481     TCC_OPTION_std,
1482     TCC_OPTION_shared,
1483     TCC_OPTION_soname,
1484     TCC_OPTION_o,
1485     TCC_OPTION_r,
1486     TCC_OPTION_s,
1487     TCC_OPTION_traditional,
1488     TCC_OPTION_Wl,
1489     TCC_OPTION_Wp,
1490     TCC_OPTION_W,
1491     TCC_OPTION_O,
1492     TCC_OPTION_mfloat_abi,
1493     TCC_OPTION_m,
1494     TCC_OPTION_f,
1495     TCC_OPTION_isystem,
1496     TCC_OPTION_iwithprefix,
1497     TCC_OPTION_include,
1498     TCC_OPTION_nostdinc,
1499     TCC_OPTION_nostdlib,
1500     TCC_OPTION_print_search_dirs,
1501     TCC_OPTION_rdynamic,
1502     TCC_OPTION_param,
1503     TCC_OPTION_pedantic,
1504     TCC_OPTION_pthread,
1505     TCC_OPTION_run,
1506     TCC_OPTION_w,
1507     TCC_OPTION_pipe,
1508     TCC_OPTION_E,
1509     TCC_OPTION_MD,
1510     TCC_OPTION_MF,
1511     TCC_OPTION_x,
1512     TCC_OPTION_ar,
1513     TCC_OPTION_impdef
1514 };
1515
1516 #define TCC_OPTION_HAS_ARG 0x0001
1517 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1518
1519 static const TCCOption tcc_options[] = {
1520     { "h", TCC_OPTION_HELP, 0 },
1521     { "-help", TCC_OPTION_HELP, 0 },
1522     { "?", TCC_OPTION_HELP, 0 },
1523     { "hh", TCC_OPTION_HELP2, 0 },
1524     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1525     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1526     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1527     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1528     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1529     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1530     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1531     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG },
1532     { "bench", TCC_OPTION_bench, 0 },
1533 #ifdef CONFIG_TCC_BACKTRACE
1534     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1535 #endif
1536 #ifdef CONFIG_TCC_BCHECK
1537     { "b", TCC_OPTION_b, 0 },
1538 #endif
1539     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1540     { "c", TCC_OPTION_c, 0 },
1541     { "dumpversion", TCC_OPTION_dumpversion, 0},
1542     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1543     { "static", TCC_OPTION_static, 0 },
1544     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1545     { "shared", TCC_OPTION_shared, 0 },
1546     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1547     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1548     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1549     { "pedantic", TCC_OPTION_pedantic, 0},
1550     { "pthread", TCC_OPTION_pthread, 0},
1551     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1552     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1553     { "r", TCC_OPTION_r, 0 },
1554     { "s", TCC_OPTION_s, 0 },
1555     { "traditional", TCC_OPTION_traditional, 0 },
1556     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1557     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1558     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1559     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1560 #ifdef TCC_TARGET_ARM
1561     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1562 #endif
1563     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1564     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1565     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1566     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1567     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1568     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1569     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1570     { "w", TCC_OPTION_w, 0 },
1571     { "pipe", TCC_OPTION_pipe, 0},
1572     { "E", TCC_OPTION_E, 0},
1573     { "MD", TCC_OPTION_MD, 0},
1574     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1575     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1576     { "ar", TCC_OPTION_ar, 0},
1577 #ifdef TCC_TARGET_PE
1578     { "impdef", TCC_OPTION_impdef, 0},
1579 #endif
1580     { NULL, 0, 0 },
1581 };
1582
1583 static const FlagDef options_W[] = {
1584     { 0, 0, "all" },
1585     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1586     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1587     { offsetof(TCCState, warn_error), 0, "error" },
1588     { offsetof(TCCState, warn_gcc_compat), 0, "gcc-compat" },
1589     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1590       "implicit-function-declaration" },
1591     { 0, 0, NULL }
1592 };
1593
1594 static const FlagDef options_f[] = {
1595     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1596     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1597     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1598     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1599     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1600     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1601     { 0, 0, NULL }
1602 };
1603
1604 static const FlagDef options_m[] = {
1605     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1606 #ifdef TCC_TARGET_X86_64
1607     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1608 #endif
1609     { 0, 0, NULL }
1610 };
1611
1612 static void parse_option_D(TCCState *s1, const char *optarg)
1613 {
1614     char *sym = tcc_strdup(optarg);
1615     char *value = strchr(sym, '=');
1616     if (value)
1617         *value++ = '\0';
1618     tcc_define_symbol(s1, sym, value);
1619     tcc_free(sym);
1620 }
1621
1622 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1623 {
1624     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1625     f->type = filetype;
1626     strcpy(f->name, filename);
1627     dynarray_add(&s->files, &s->nb_files, f);
1628 }
1629
1630 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1631 {
1632     int ret = 0, q, c;
1633     CString str;
1634     for(;;) {
1635         while (c = (unsigned char)*r, c && c <= ' ')
1636           ++r;
1637         if (c == 0)
1638             break;
1639         q = 0;
1640         cstr_new(&str);
1641         while (c = (unsigned char)*r, c) {
1642             ++r;
1643             if (c == '\\' && (*r == '"' || *r == '\\')) {
1644                 c = *r++;
1645             } else if (c == '"') {
1646                 q = !q;
1647                 continue;
1648             } else if (q == 0 && c <= ' ') {
1649                 break;
1650             }
1651             cstr_ccat(&str, c);
1652         }
1653         cstr_ccat(&str, 0);
1654         //printf("<%s>\n", str.data), fflush(stdout);
1655         dynarray_add(argv, argc, tcc_strdup(str.data));
1656         cstr_free(&str);
1657         ++ret;
1658     }
1659     return ret;
1660 }
1661
1662 /* read list file */
1663 static void args_parser_listfile(TCCState *s,
1664     const char *filename, int optind, int *pargc, char ***pargv)
1665 {
1666     int fd, i;
1667     size_t len;
1668     char *p;
1669     int argc = 0;
1670     char **argv = NULL;
1671
1672     fd = open(filename, O_RDONLY | O_BINARY);
1673     if (fd < 0)
1674         tcc_error("listfile '%s' not found", filename);
1675
1676     len = lseek(fd, 0, SEEK_END);
1677     p = tcc_malloc(len + 1), p[len] = 0;
1678     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1679
1680     for (i = 0; i < *pargc; ++i)
1681         if (i == optind)
1682             args_parser_make_argv(p, &argc, &argv);
1683         else
1684             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1685
1686     tcc_free(p);
1687     dynarray_reset(&s->argv, &s->argc);
1688     *pargc = s->argc = argc, *pargv = s->argv = argv;
1689 }
1690
1691 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1692 {
1693     const TCCOption *popt;
1694     const char *optarg, *r;
1695     const char *run = NULL;
1696     int last_o = -1;
1697     int x;
1698     CString linker_arg; /* collect -Wl options */
1699     int tool = 0, arg_start = 0, noaction = optind;
1700     char **argv = *pargv;
1701     int argc = *pargc;
1702
1703     cstr_new(&linker_arg);
1704
1705     while (optind < argc) {
1706         r = argv[optind];
1707         if (r[0] == '@' && r[1] != '\0') {
1708             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1709             continue;
1710         }
1711         optind++;
1712         if (tool) {
1713             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1714                 ++s->verbose;
1715             continue;
1716         }
1717 reparse:
1718         if (r[0] != '-' || r[1] == '\0') {
1719             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1720                 args_parser_add_file(s, r, s->filetype);
1721             if (run) {
1722                 tcc_set_options(s, run);
1723                 arg_start = optind - 1;
1724                 break;
1725             }
1726             continue;
1727         }
1728
1729         /* find option in table */
1730         for(popt = tcc_options; ; ++popt) {
1731             const char *p1 = popt->name;
1732             const char *r1 = r + 1;
1733             if (p1 == NULL)
1734                 tcc_error("invalid option -- '%s'", r);
1735             if (!strstart(p1, &r1))
1736                 continue;
1737             optarg = r1;
1738             if (popt->flags & TCC_OPTION_HAS_ARG) {
1739                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1740                     if (optind >= argc)
1741                 arg_err:
1742                         tcc_error("argument to '%s' is missing", r);
1743                     optarg = argv[optind++];
1744                 }
1745             } else if (*r1 != '\0')
1746                 continue;
1747             break;
1748         }
1749
1750         switch(popt->index) {
1751         case TCC_OPTION_HELP:
1752             return OPT_HELP;
1753         case TCC_OPTION_HELP2:
1754             return OPT_HELP2;
1755         case TCC_OPTION_I:
1756             tcc_add_include_path(s, optarg);
1757             break;
1758         case TCC_OPTION_D:
1759             parse_option_D(s, optarg);
1760             break;
1761         case TCC_OPTION_U:
1762             tcc_undefine_symbol(s, optarg);
1763             break;
1764         case TCC_OPTION_L:
1765             tcc_add_library_path(s, optarg);
1766             break;
1767         case TCC_OPTION_B:
1768             /* set tcc utilities path (mainly for tcc development) */
1769             tcc_set_lib_path(s, optarg);
1770             break;
1771         case TCC_OPTION_l:
1772             args_parser_add_file(s, optarg, AFF_TYPE_LIB | (s->filetype & ~AFF_TYPE_MASK));
1773             s->nb_libraries++;
1774             break;
1775         case TCC_OPTION_pthread:
1776             parse_option_D(s, "_REENTRANT");
1777             s->option_pthread = 1;
1778             break;
1779         case TCC_OPTION_bench:
1780             s->do_bench = 1;
1781             break;
1782 #ifdef CONFIG_TCC_BACKTRACE
1783         case TCC_OPTION_bt:
1784             tcc_set_num_callers(atoi(optarg));
1785             break;
1786 #endif
1787 #ifdef CONFIG_TCC_BCHECK
1788         case TCC_OPTION_b:
1789             s->do_bounds_check = 1;
1790             s->do_debug = 1;
1791             break;
1792 #endif
1793         case TCC_OPTION_g:
1794             s->do_debug = 1;
1795             break;
1796         case TCC_OPTION_c:
1797             x = TCC_OUTPUT_OBJ;
1798         set_output_type:
1799             if (s->output_type)
1800                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1801             s->output_type = x;
1802             break;
1803         case TCC_OPTION_d:
1804             if (*optarg == 'D')
1805                 s->dflag = 3;
1806             else if (*optarg == 'M')
1807                 s->dflag = 7;
1808             else if (*optarg == 't')
1809                 s->dflag = 16;
1810             else if (isnum(*optarg))
1811                 g_debug = atoi(optarg);
1812             else
1813                 goto unsupported_option;
1814             break;
1815         case TCC_OPTION_static:
1816             s->static_link = 1;
1817             break;
1818         case TCC_OPTION_std:
1819             if (*optarg == '=') {
1820                 if (strcmp(optarg, "=c11") == 0) {
1821                     tcc_undefine_symbol(s, "__STDC_VERSION__");
1822                     tcc_define_symbol(s, "__STDC_VERSION__", "201112L");
1823                     /*
1824                      * The integer constant 1, intended to indicate
1825                      * that the implementation does not support atomic
1826                      * types (including the _Atomic type qualiﬁer) and
1827                      * the <stdatomic.h> header.
1828                      */
1829                     tcc_define_symbol(s, "__STDC_NO_ATOMICS__", "1");
1830                     /*
1831                      * The integer constant 1, intended to indicate
1832                      * that the implementation does not support complex
1833                      * types or the <complex.h> header.
1834                      */
1835                     tcc_define_symbol(s, "__STDC_NO_COMPLEX__", "1");
1836                     /*
1837                      * The integer constant 1, intended to indicate
1838                      * that the implementation does not support the
1839                      * <threads.h> header.
1840                      */
1841                     tcc_define_symbol(s, "__STDC_NO_THREADS__", "1");
1842                     /*
1843                      * __STDC_NO_VLA__, tcc supports VLA.
1844                      * The integer constant 1, intended to indicate
1845                      * that the implementation does not support
1846                      * variable length arrays or variably modiﬁed
1847                      * types.
1848                      */
1849 #if !defined(TCC_TARGET_PE)
1850                     /*
1851                      * An integer constant of the form yyyymmL (for
1852                      * example, 199712L). If this symbol is deﬁned,
1853                      * then every character in the Unicode required
1854                      * set, when stored in an object of type
1855                      * wchar_t, has the same value as the short
1856                      * identiﬁer of that character.
1857                      */
1858                     #if 0
1859                     /* on Linux, this conflicts with a define introduced by
1860                      * /usr/include/stdc-predef.h included by glibc libs;
1861                      * clang doesn't define it at all so it's probably not necessary
1862                      */
1863                     tcc_define_symbol(s, "__STDC_ISO_10646__", "201605L");
1864                     #endif
1865                     /*
1866                      * The integer constant 1, intended to indicate
1867                      * that values of type char16_t are UTF−16
1868                      * encoded. If some other encoding is used, the
1869                      * macro shall not be deﬁned and the actual
1870                      * encoding used is implementation deﬁned.
1871                      */
1872                     tcc_define_symbol(s, "__STDC_UTF_16__", "1");
1873                     /*
1874                      * The integer constant 1, intended to indicate
1875                      * that values of type char32_t are UTF−32
1876                      * encoded. If some other encoding is used, the
1877                      * macro shall not be deﬁned and the actual
1878                      * encoding used is implementationdeﬁned.
1879                      */
1880                     tcc_define_symbol(s, "__STDC_UTF_32__", "1");
1881 #endif /* !TCC_TARGET_PE */
1882                     s->cversion = 201112;
1883                 }
1884             }
1885             /*
1886              * silently ignore other values, a current purpose:
1887              * allow to use a tcc as a reference compiler for "make test"
1888              */
1889             break;
1890         case TCC_OPTION_shared:
1891             x = TCC_OUTPUT_DLL;
1892             goto set_output_type;
1893         case TCC_OPTION_soname:
1894             s->soname = tcc_strdup(optarg);
1895             break;
1896         case TCC_OPTION_o:
1897             if (s->outfile) {
1898                 tcc_warning("multiple -o option");
1899                 tcc_free(s->outfile);
1900             }
1901             s->outfile = tcc_strdup(optarg);
1902             break;
1903         case TCC_OPTION_r:
1904             /* generate a .o merging several output files */
1905             s->option_r = 1;
1906             x = TCC_OUTPUT_OBJ;
1907             goto set_output_type;
1908         case TCC_OPTION_isystem:
1909             tcc_add_sysinclude_path(s, optarg);
1910             break;
1911         case TCC_OPTION_include:
1912             dynarray_add(&s->cmd_include_files,
1913                          &s->nb_cmd_include_files, tcc_strdup(optarg));
1914             break;
1915         case TCC_OPTION_nostdinc:
1916             s->nostdinc = 1;
1917             break;
1918         case TCC_OPTION_nostdlib:
1919             s->nostdlib = 1;
1920             break;
1921         case TCC_OPTION_run:
1922 #ifndef TCC_IS_NATIVE
1923             tcc_error("-run is not available in a cross compiler");
1924 #endif
1925             run = optarg;
1926             x = TCC_OUTPUT_MEMORY;
1927             goto set_output_type;
1928         case TCC_OPTION_v:
1929             do ++s->verbose; while (*optarg++ == 'v');
1930             ++noaction;
1931             break;
1932         case TCC_OPTION_f:
1933             if (set_flag(s, options_f, optarg) < 0)
1934                 goto unsupported_option;
1935             break;
1936 #ifdef TCC_TARGET_ARM
1937         case TCC_OPTION_mfloat_abi:
1938             /* tcc doesn't support soft float yet */
1939             if (!strcmp(optarg, "softfp")) {
1940                 s->float_abi = ARM_SOFTFP_FLOAT;
1941                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1942             } else if (!strcmp(optarg, "hard"))
1943                 s->float_abi = ARM_HARD_FLOAT;
1944             else
1945                 tcc_error("unsupported float abi '%s'", optarg);
1946             break;
1947 #endif
1948         case TCC_OPTION_m:
1949             if (set_flag(s, options_m, optarg) < 0) {
1950                 if (x = atoi(optarg), x != 32 && x != 64)
1951                     goto unsupported_option;
1952                 if (PTR_SIZE != x/8)
1953                     return x;
1954                 ++noaction;
1955             }
1956             break;
1957         case TCC_OPTION_W:
1958             if (set_flag(s, options_W, optarg) < 0)
1959                 goto unsupported_option;
1960             break;
1961         case TCC_OPTION_w:
1962             s->warn_none = 1;
1963             break;
1964         case TCC_OPTION_rdynamic:
1965             s->rdynamic = 1;
1966             break;
1967         case TCC_OPTION_Wl:
1968             if (linker_arg.size)
1969                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1970             cstr_cat(&linker_arg, optarg, 0);
1971             if (tcc_set_linker(s, linker_arg.data))
1972                 cstr_free(&linker_arg);
1973             break;
1974         case TCC_OPTION_Wp:
1975             r = optarg;
1976             goto reparse;
1977         case TCC_OPTION_E:
1978             x = TCC_OUTPUT_PREPROCESS;
1979             goto set_output_type;
1980         case TCC_OPTION_P:
1981             s->Pflag = atoi(optarg) + 1;
1982             break;
1983         case TCC_OPTION_MD:
1984             s->gen_deps = 1;
1985             break;
1986         case TCC_OPTION_MF:
1987             s->deps_outfile = tcc_strdup(optarg);
1988             break;
1989         case TCC_OPTION_dumpversion:
1990             printf ("%s\n", TCC_VERSION);
1991             exit(0);
1992             break;
1993         case TCC_OPTION_x:
1994             x = 0;
1995             if (*optarg == 'c')
1996                 x = AFF_TYPE_C;
1997             else if (*optarg == 'a')
1998                 x = AFF_TYPE_ASMPP;
1999             else if (*optarg == 'b')
2000                 x = AFF_TYPE_BIN;
2001             else if (*optarg == 'n')
2002                 x = AFF_TYPE_NONE;
2003             else
2004                 tcc_warning("unsupported language '%s'", optarg);
2005             s->filetype = x | (s->filetype & ~AFF_TYPE_MASK);
2006             break;
2007         case TCC_OPTION_O:
2008             last_o = atoi(optarg);
2009             break;
2010         case TCC_OPTION_print_search_dirs:
2011             x = OPT_PRINT_DIRS;
2012             goto extra_action;
2013         case TCC_OPTION_impdef:
2014             x = OPT_IMPDEF;
2015             goto extra_action;
2016         case TCC_OPTION_ar:
2017             x = OPT_AR;
2018         extra_action:
2019             arg_start = optind - 1;
2020             if (arg_start != noaction)
2021                 tcc_error("cannot parse %s here", r);
2022             tool = x;
2023             break;
2024         case TCC_OPTION_traditional:
2025         case TCC_OPTION_pedantic:
2026         case TCC_OPTION_pipe:
2027         case TCC_OPTION_s:
2028             /* ignored */
2029             break;
2030         default:
2031 unsupported_option:
2032             if (s->warn_unsupported)
2033                 tcc_warning("unsupported option '%s'", r);
2034             break;
2035         }
2036     }
2037     if (last_o > 0)
2038         tcc_define_symbol(s, "__OPTIMIZE__", NULL);
2039     if (linker_arg.size) {
2040         r = linker_arg.data;
2041         goto arg_err;
2042     }
2043     *pargc = argc - arg_start;
2044     *pargv = argv + arg_start;
2045     if (tool)
2046         return tool;
2047     if (optind != noaction)
2048         return 0;
2049     if (s->verbose == 2)
2050         return OPT_PRINT_DIRS;
2051     if (s->verbose)
2052         return OPT_V;
2053     return OPT_HELP;
2054 }
2055
2056 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
2057 {
2058     char **argv = NULL;
2059     int argc = 0;
2060     args_parser_make_argv(r, &argc, &argv);
2061     tcc_parse_args(s, &argc, &argv, 0);
2062     dynarray_reset(&argv, &argc);
2063 }
2064
2065 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time)
2066 {
2067     if (total_time < 1)
2068         total_time = 1;
2069     if (total_bytes < 1)
2070         total_bytes = 1;
2071     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
2072                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
2073            tok_ident - TOK_IDENT, total_lines, total_bytes,
2074            (double)total_time/1000,
2075            (unsigned)total_lines*1000/total_time,
2076            (double)total_bytes/1000/total_time);
2077 #ifdef MEM_DEBUG
2078     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
2079 #endif
2080 }