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 #endif
  49 #ifdef TCC_TARGET_ARM
  50 #include "arm-gen.c"
  51 #include "arm-link.c"
  52 #include "arm-asm.c"
  53 #endif
  54 #ifdef TCC_TARGET_ARM64
  55 #include "arm64-gen.c"
  56 #include "arm64-link.c"
  57 #endif
  58 #ifdef TCC_TARGET_C67
  59 #include "c67-gen.c"
  60 #include "c67-link.c"
  61 #include "tcccoff.c"
  62 #endif
  63 #ifdef TCC_TARGET_X86_64
  64 #include "x86_64-gen.c"
  65 #include "x86_64-link.c"
  66 #include "i386-asm.c"
  67 #endif
  68 #ifdef CONFIG_TCC_ASM
  69 #include "tccasm.c"
  70 #endif
  71 #ifdef TCC_TARGET_PE
  72 #include "tccpe.c"
  73 #endif
  74 #endif /* ONE_SOURCE */
  75
  76 /********************************************************/
  77 #ifndef CONFIG_TCC_ASM
  78 ST_FUNC void asm_instr(void)
  79 {
  80     tcc_error("inline asm() not supported");
  81 }
  82 ST_FUNC void asm_global_instr(void)
  83 {
  84     tcc_error("inline asm() not supported");
  85 }
  86 #endif
  87
  88 /********************************************************/
  89 #ifdef _WIN32
  90 ST_FUNC char *normalize_slashes(char *path)
  91 {
  92     char *p;
  93     for (p = path; *p; ++p)
  94         if (*p == '\\')
  95             *p = '/';
  96     return path;
  97 }
  98
  99 static HMODULE tcc_module;
 100
 101 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 102 static void tcc_set_lib_path_w32(TCCState *s)
 103 {
 104     char path[1024], *p;
 105     GetModuleFileNameA(tcc_module, path, sizeof path);
 106     p = tcc_basename(normalize_slashes(strlwr(path)));
 107     if (p > path)
 108         --p;
 109     *p = 0;
 110     tcc_set_lib_path(s, path);
 111 }
 112
 113 #ifdef TCC_TARGET_PE
 114 static void tcc_add_systemdir(TCCState *s)
 115 {
 116     char buf[1000];
 117     GetSystemDirectory(buf, sizeof buf);
 118     tcc_add_library_path(s, normalize_slashes(buf));
 119 }
 120 #endif
 121
 122 #ifdef LIBTCC_AS_DLL
 123 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 124 {
 125     if (DLL_PROCESS_ATTACH == dwReason)
 126         tcc_module = hDll;
 127     return TRUE;
 128 }
 129 #endif
 130 #endif
 131
 132 /********************************************************/
 133 /* copy a string and truncate it. */
 134 ST_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 135 {
 136     char *q, *q_end;
 137     int c;
 138
 139     if (buf_size > 0) {
 140         q = buf;
 141         q_end = buf + buf_size - 1;
 142         while (q < q_end) {
 143             c = *s++;
 144             if (c == '\0')
 145                 break;
 146             *q++ = c;
 147         }
 148         *q = '\0';
 149     }
 150     return buf;
 151 }
 152
 153 /* strcat and truncate. */
 154 ST_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 155 {
 156     int len;
 157     len = strlen(buf);
 158     if (len < buf_size)
 159         pstrcpy(buf + len, buf_size - len, s);
 160     return buf;
 161 }
 162
 163 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 164 {
 165     memcpy(out, in, num);
 166     out[num] = '\0';
 167     return out;
 168 }
 169
 170 /* extract the basename of a file */
 171 PUB_FUNC char *tcc_basename(const char *name)
 172 {
 173     char *p = strchr(name, 0);
 174     while (p > name && !IS_DIRSEP(p[-1]))
 175         --p;
 176     return p;
 177 }
 178
 179 /* extract extension part of a file
 180  *
 181  * (if no extension, return pointer to end-of-string)
 182  */
 183 PUB_FUNC char *tcc_fileextension (const char *name)
 184 {
 185     char *b = tcc_basename(name);
 186     char *e = strrchr(b, '.');
 187     return e ? e : strchr(b, 0);
 188 }
 189
 190 /********************************************************/
 191 /* memory management */
 192
 193 #undef free
 194 #undef malloc
 195 #undef realloc
 196
 197 #ifndef MEM_DEBUG
 198
 199 PUB_FUNC void tcc_free(void *ptr)
 200 {
 201     free(ptr);
 202 }
 203
 204 PUB_FUNC void *tcc_malloc(unsigned long size)
 205 {
 206     void *ptr;
 207     ptr = malloc(size);
 208     if (!ptr && size)
 209         tcc_error("memory full (malloc)");
 210     return ptr;
 211 }
 212
 213 PUB_FUNC void *tcc_mallocz(unsigned long size)
 214 {
 215     void *ptr;
 216     ptr = tcc_malloc(size);
 217     memset(ptr, 0, size);
 218     return ptr;
 219 }
 220
 221 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 222 {
 223     void *ptr1;
 224     ptr1 = realloc(ptr, size);
 225     if (!ptr1 && size)
 226         tcc_error("memory full (realloc)");
 227     return ptr1;
 228 }
 229
 230 PUB_FUNC char *tcc_strdup(const char *str)
 231 {
 232     char *ptr;
 233     ptr = tcc_malloc(strlen(str) + 1);
 234     strcpy(ptr, str);
 235     return ptr;
 236 }
 237
 238 PUB_FUNC void tcc_memcheck(void)
 239 {
 240 }
 241
 242 #else
 243
 244 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 245 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 246 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 247 #define MEM_DEBUG_FILE_LEN 40
 248 #define MEM_DEBUG_CHECK3(header) \
 249     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 250 #define MEM_USER_PTR(header) \
 251     ((char *)header + offsetof(mem_debug_header_t, magic3))
 252 #define MEM_HEADER_PTR(ptr) \
 253     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 254
 255 struct mem_debug_header {
 256     unsigned magic1;
 257     unsigned size;
 258     struct mem_debug_header *prev;
 259     struct mem_debug_header *next;
 260     int line_num;
 261     char file_name[MEM_DEBUG_FILE_LEN + 1];
 262     unsigned magic2;
 263     ALIGNED(16) unsigned magic3;
 264 };
 265
 266 typedef struct mem_debug_header mem_debug_header_t;
 267
 268 static mem_debug_header_t *mem_debug_chain;
 269 static unsigned mem_cur_size;
 270 static unsigned mem_max_size;
 271
 272 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 273 {
 274     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 275     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 276         header->magic2 != MEM_DEBUG_MAGIC2 ||
 277         MEM_DEBUG_CHECK3(header) != MEM_DEBUG_MAGIC3 ||
 278         header->size == (unsigned)-1) {
 279         fprintf(stderr, "%s check failed\n", msg);
 280         if (header->magic1 == MEM_DEBUG_MAGIC1)
 281             fprintf(stderr, "%s:%u: block allocated here.\n",
 282                 header->file_name, header->line_num);
 283         exit(1);
 284     }
 285     return header;
 286 }
 287
 288 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 289 {
 290     int ofs;
 291     mem_debug_header_t *header;
 292
 293     header = malloc(sizeof(mem_debug_header_t) + size);
 294     if (!header)
 295         tcc_error("memory full (malloc)");
 296
 297     header->magic1 = MEM_DEBUG_MAGIC1;
 298     header->magic2 = MEM_DEBUG_MAGIC2;
 299     header->size = size;
 300     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 301     header->line_num = line;
 302     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 303     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 304     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 305
 306     header->next = mem_debug_chain;
 307     header->prev = NULL;
 308     if (header->next)
 309         header->next->prev = header;
 310     mem_debug_chain = header;
 311
 312     mem_cur_size += size;
 313     if (mem_cur_size > mem_max_size)
 314         mem_max_size = mem_cur_size;
 315
 316     return MEM_USER_PTR(header);
 317 }
 318
 319 PUB_FUNC void tcc_free_debug(void *ptr)
 320 {
 321     mem_debug_header_t *header;
 322     if (!ptr)
 323         return;
 324     header = malloc_check(ptr, "tcc_free");
 325     mem_cur_size -= header->size;
 326     header->size = (unsigned)-1;
 327     if (header->next)
 328         header->next->prev = header->prev;
 329     if (header->prev)
 330         header->prev->next = header->next;
 331     if (header == mem_debug_chain)
 332         mem_debug_chain = header->next;
 333     free(header);
 334 }
 335
 336 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 337 {
 338     void *ptr;
 339     ptr = tcc_malloc_debug(size,file,line);
 340     memset(ptr, 0, size);
 341     return ptr;
 342 }
 343
 344 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 345 {
 346     mem_debug_header_t *header;
 347     int mem_debug_chain_update = 0;
 348     if (!ptr)
 349         return tcc_malloc_debug(size, file, line);
 350     header = malloc_check(ptr, "tcc_realloc");
 351     mem_cur_size -= header->size;
 352     mem_debug_chain_update = (header == mem_debug_chain);
 353     header = realloc(header, sizeof(mem_debug_header_t) + size);
 354     if (!header)
 355         tcc_error("memory full (realloc)");
 356     header->size = size;
 357     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 358     if (header->next)
 359         header->next->prev = header;
 360     if (header->prev)
 361         header->prev->next = header;
 362     if (mem_debug_chain_update)
 363         mem_debug_chain = header;
 364     mem_cur_size += size;
 365     if (mem_cur_size > mem_max_size)
 366         mem_max_size = mem_cur_size;
 367     return MEM_USER_PTR(header);
 368 }
 369
 370 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 371 {
 372     char *ptr;
 373     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 374     strcpy(ptr, str);
 375     return ptr;
 376 }
 377
 378 PUB_FUNC void tcc_memcheck(void)
 379 {
 380     if (mem_cur_size) {
 381         mem_debug_header_t *header = mem_debug_chain;
 382         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 383             mem_cur_size, mem_max_size);
 384         while (header) {
 385             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 386                 header->file_name, header->line_num, header->size);
 387             header = header->next;
 388         }
 389 #if MEM_DEBUG-0 == 2
 390         exit(2);
 391 #endif
 392     }
 393 }
 394 #endif /* MEM_DEBUG */
 395
 396 #define free(p) use_tcc_free(p)
 397 #define malloc(s) use_tcc_malloc(s)
 398 #define realloc(p, s) use_tcc_realloc(p, s)
 399
 400 /********************************************************/
 401 /* dynarrays */
 402
 403 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 404 {
 405     int nb, nb_alloc;
 406     void **pp;
 407
 408     nb = *nb_ptr;
 409     pp = *(void ***)ptab;
 410     /* every power of two we double array size */
 411     if ((nb & (nb - 1)) == 0) {
 412         if (!nb)
 413             nb_alloc = 1;
 414         else
 415             nb_alloc = nb * 2;
 416         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 417         *(void***)ptab = pp;
 418     }
 419     pp[nb++] = data;
 420     *nb_ptr = nb;
 421 }
 422
 423 ST_FUNC void dynarray_reset(void *pp, int *n)
 424 {
 425     void **p;
 426     for (p = *(void***)pp; *n; ++p, --*n)
 427         if (*p)
 428             tcc_free(*p);
 429     tcc_free(*(void**)pp);
 430     *(void**)pp = NULL;
 431 }
 432
 433 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 434 {
 435     const char *p;
 436     do {
 437         int c;
 438         CString str;
 439
 440         cstr_new(&str);
 441         for (p = in; c = *p, c != '\0' && c != PATHSEP[0]; ++p) {
 442             if (c == '{' && p[1] && p[2] == '}') {
 443                 c = p[1], p += 2;
 444                 if (c == 'B')
 445                     cstr_cat(&str, s->tcc_lib_path, -1);
 446             } else {
 447                 cstr_ccat(&str, c);
 448             }
 449         }
 450         if (str.size) {
 451             cstr_ccat(&str, '\0');
 452             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 453         }
 454         cstr_free(&str);
 455         in = p+1;
 456     } while (*p);
 457 }
 458
 459 /********************************************************/
 460
 461 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 462 {
 463     int len;
 464     len = strlen(buf);
 465     vsnprintf(buf + len, buf_size - len, fmt, ap);
 466 }
 467
 468 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 469 {
 470     va_list ap;
 471     va_start(ap, fmt);
 472     strcat_vprintf(buf, buf_size, fmt, ap);
 473     va_end(ap);
 474 }
 475
 476 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 477 {
 478     char buf[2048];
 479     BufferedFile **pf, *f;
 480
 481     buf[0] = '\0';
 482     /* use upper file if inline ":asm:" or token ":paste:" */
 483     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 484      ;
 485     if (f) {
 486         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 487             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 488                 (*pf)->filename, (*pf)->line_num);
 489         if (s1->error_set_jmp_enabled) {
 490             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 491                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 492         } else {
 493             strcat_printf(buf, sizeof(buf), "%s: ",
 494                 f->filename);
 495         }
 496     } else {
 497         strcat_printf(buf, sizeof(buf), "tcc: ");
 498     }
 499     if (is_warning)
 500         strcat_printf(buf, sizeof(buf), "warning: ");
 501     else
 502         strcat_printf(buf, sizeof(buf), "error: ");
 503     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 504
 505     if (!s1->error_func) {
 506         /* default case: stderr */
 507         if (s1->output_type == TCC_OUTPUT_PREPROCESS && s1->ppfp == stdout)
 508             /* print a newline during tcc -E */
 509             printf("\n"), fflush(stdout);
 510         fflush(stdout); /* flush -v output */
 511         fprintf(stderr, "%s\n", buf);
 512         fflush(stderr); /* print error/warning now (win32) */
 513     } else {
 514         s1->error_func(s1->error_opaque, buf);
 515     }
 516     if (!is_warning || s1->warn_error)
 517         s1->nb_errors++;
 518 }
 519
 520 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 521                         void (*error_func)(void *opaque, const char *msg))
 522 {
 523     s->error_opaque = error_opaque;
 524     s->error_func = error_func;
 525 }
 526
 527 /* error without aborting current compilation */
 528 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 529 {
 530     TCCState *s1 = tcc_state;
 531     va_list ap;
 532
 533     va_start(ap, fmt);
 534     error1(s1, 0, fmt, ap);
 535     va_end(ap);
 536 }
 537
 538 PUB_FUNC void tcc_error(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     /* better than nothing: in some cases, we accept to handle errors */
 547     if (s1->error_set_jmp_enabled) {
 548         longjmp(s1->error_jmp_buf, 1);
 549     } else {
 550         /* XXX: eliminate this someday */
 551         exit(1);
 552     }
 553 }
 554
 555 PUB_FUNC void tcc_warning(const char *fmt, ...)
 556 {
 557     TCCState *s1 = tcc_state;
 558     va_list ap;
 559
 560     if (s1->warn_none)
 561         return;
 562
 563     va_start(ap, fmt);
 564     error1(s1, 1, fmt, ap);
 565     va_end(ap);
 566 }
 567
 568 /********************************************************/
 569 /* I/O layer */
 570
 571 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 572 {
 573     BufferedFile *bf;
 574     int buflen = initlen ? initlen : IO_BUF_SIZE;
 575
 576     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 577     bf->buf_ptr = bf->buffer;
 578     bf->buf_end = bf->buffer + initlen;
 579     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 580     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 581     bf->true_filename = bf->filename;
 582     bf->line_num = 1;
 583     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 584     bf->fd = -1;
 585     bf->prev = file;
 586     file = bf;
 587     tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 588 }
 589
 590 ST_FUNC void tcc_close(void)
 591 {
 592     BufferedFile *bf = file;
 593     if (bf->fd > 0) {
 594         close(bf->fd);
 595         total_lines += bf->line_num;
 596     }
 597     if (bf->true_filename != bf->filename)
 598         tcc_free(bf->true_filename);
 599     file = bf->prev;
 600     tcc_free(bf);
 601 }
 602
 603 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 604 {
 605     int fd;
 606     if (strcmp(filename, "-") == 0)
 607         fd = 0, filename = "<stdin>";
 608     else
 609         fd = open(filename, O_RDONLY | O_BINARY);
 610     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 611         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 612                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 613     if (fd < 0)
 614         return -1;
 615     tcc_open_bf(s1, filename, 0);
 616 #ifdef _WIN32
 617     normalize_slashes(file->filename);
 618 #endif
 619     file->fd = fd;
 620     return fd;
 621 }
 622
 623 /* compile the file opened in 'file'. Return non zero if errors. */
 624 static int tcc_compile(TCCState *s1)
 625 {
 626     Sym *define_start;
 627     int filetype, is_asm;
 628
 629     define_start = define_stack;
 630     filetype = s1->filetype;
 631     is_asm = filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP;
 632     tccelf_begin_file(s1);
 633
 634     if (setjmp(s1->error_jmp_buf) == 0) {
 635         s1->nb_errors = 0;
 636         s1->error_set_jmp_enabled = 1;
 637
 638         preprocess_start(s1, is_asm);
 639         if (s1->output_type == TCC_OUTPUT_PREPROCESS) {
 640             tcc_preprocess(s1);
 641         } else if (is_asm) {
 642 #ifdef CONFIG_TCC_ASM
 643             tcc_assemble(s1, filetype == AFF_TYPE_ASMPP);
 644 #else
 645             tcc_error_noabort("asm not supported");
 646 #endif
 647         } else {
 648             tccgen_compile(s1);
 649         }
 650     }
 651     s1->error_set_jmp_enabled = 0;
 652
 653     preprocess_end(s1);
 654     free_inline_functions(s1);
 655     /* reset define stack, but keep -D and built-ins */
 656     free_defines(define_start);
 657     sym_pop(&global_stack, NULL, 0);
 658     sym_pop(&local_stack, NULL, 0);
 659     tccelf_end_file(s1);
 660     return s1->nb_errors != 0 ? -1 : 0;
 661 }
 662
 663 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 664 {
 665     int len, ret;
 666
 667     len = strlen(str);
 668     tcc_open_bf(s, "<string>", len);
 669     memcpy(file->buffer, str, len);
 670     ret = tcc_compile(s);
 671     tcc_close();
 672     return ret;
 673 }
 674
 675 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 676 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 677 {
 678     int len1, len2;
 679     /* default value */
 680     if (!value)
 681         value = "1";
 682     len1 = strlen(sym);
 683     len2 = strlen(value);
 684
 685     /* init file structure */
 686     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 687     memcpy(file->buffer, sym, len1);
 688     file->buffer[len1] = ' ';
 689     memcpy(file->buffer + len1 + 1, value, len2);
 690
 691     /* parse with define parser */
 692     next_nomacro();
 693     parse_define();
 694     tcc_close();
 695 }
 696
 697 /* undefine a preprocessor symbol */
 698 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 699 {
 700     TokenSym *ts;
 701     Sym *s;
 702     ts = tok_alloc(sym, strlen(sym));
 703     s = define_find(ts->tok);
 704     /* undefine symbol by putting an invalid name */
 705     if (s)
 706         define_undef(s);
 707 }
 708
 709 /* cleanup all static data used during compilation */
 710 static void tcc_cleanup(void)
 711 {
 712     if (NULL == tcc_state)
 713         return;
 714     while (file)
 715         tcc_close();
 716     tccpp_delete(tcc_state);
 717     tcc_state = NULL;
 718     /* free sym_pools */
 719     dynarray_reset(&sym_pools, &nb_sym_pools);
 720     /* reset symbol stack */
 721     sym_free_first = NULL;
 722 }
 723
 724 LIBTCCAPI TCCState *tcc_new(void)
 725 {
 726     TCCState *s;
 727
 728     tcc_cleanup();
 729
 730     s = tcc_mallocz(sizeof(TCCState));
 731     if (!s)
 732         return NULL;
 733     tcc_state = s;
 734     ++nb_states;
 735
 736     s->alacarte_link = 1;
 737     s->nocommon = 1;
 738     s->warn_implicit_function_declaration = 1;
 739     s->ms_extensions = 1;
 740
 741 #ifdef CHAR_IS_UNSIGNED
 742     s->char_is_unsigned = 1;
 743 #endif
 744 #ifdef TCC_TARGET_I386
 745     s->seg_size = 32;
 746 #endif
 747     /* enable this if you want symbols with leading underscore on windows: */
 748 #if 0 /* def TCC_TARGET_PE */
 749     s->leading_underscore = 1;
 750 #endif
 751 #ifdef _WIN32
 752     tcc_set_lib_path_w32(s);
 753 #else
 754     tcc_set_lib_path(s, CONFIG_TCCDIR);
 755 #endif
 756     tccelf_new(s);
 757     tccpp_new(s);
 758
 759     /* we add dummy defines for some special macros to speed up tests
 760        and to have working defined() */
 761     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 762     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 763     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 764     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 765     define_push(TOK___COUNTER__, MACRO_OBJ, NULL, NULL);
 766     {
 767         /* define __TINYC__ 92X  */
 768         char buffer[32]; int a,b,c;
 769         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 770         sprintf(buffer, "%d", a*10000 + b*100 + c);
 771         tcc_define_symbol(s, "__TINYC__", buffer);
 772     }
 773
 774     /* standard defines */
 775     tcc_define_symbol(s, "__STDC__", NULL);
 776     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 777     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 778
 779     /* target defines */
 780 #if defined(TCC_TARGET_I386)
 781     tcc_define_symbol(s, "__i386__", NULL);
 782     tcc_define_symbol(s, "__i386", NULL);
 783     tcc_define_symbol(s, "i386", NULL);
 784 #elif defined(TCC_TARGET_X86_64)
 785     tcc_define_symbol(s, "__x86_64__", NULL);
 786 #elif defined(TCC_TARGET_ARM)
 787     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 788     tcc_define_symbol(s, "__arm_elf__", NULL);
 789     tcc_define_symbol(s, "__arm_elf", NULL);
 790     tcc_define_symbol(s, "arm_elf", NULL);
 791     tcc_define_symbol(s, "__arm__", NULL);
 792     tcc_define_symbol(s, "__arm", NULL);
 793     tcc_define_symbol(s, "arm", NULL);
 794     tcc_define_symbol(s, "__APCS_32__", NULL);
 795     tcc_define_symbol(s, "__ARMEL__", NULL);
 796 #if defined(TCC_ARM_EABI)
 797     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 798 #endif
 799 #if defined(TCC_ARM_HARDFLOAT)
 800     s->float_abi = ARM_HARD_FLOAT;
 801     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 802 #else
 803     s->float_abi = ARM_SOFTFP_FLOAT;
 804 #endif
 805 #elif defined(TCC_TARGET_ARM64)
 806     tcc_define_symbol(s, "__aarch64__", NULL);
 807 #elif defined TCC_TARGET_C67
 808     tcc_define_symbol(s, "__C67__", NULL);
 809 #endif
 810
 811 #ifdef TCC_TARGET_PE
 812     tcc_define_symbol(s, "_WIN32", NULL);
 813 # ifdef TCC_TARGET_X86_64
 814     tcc_define_symbol(s, "_WIN64", NULL);
 815 # endif
 816 #else
 817     tcc_define_symbol(s, "__unix__", NULL);
 818     tcc_define_symbol(s, "__unix", NULL);
 819     tcc_define_symbol(s, "unix", NULL);
 820 # if defined(__linux__)
 821     tcc_define_symbol(s, "__linux__", NULL);
 822     tcc_define_symbol(s, "__linux", NULL);
 823 # endif
 824 # if defined(__FreeBSD__)
 825     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 826     /* No 'Thread Storage Local' on FreeBSD with tcc */
 827     tcc_define_symbol(s, "__NO_TLS", NULL);
 828 # endif
 829 # if defined(__FreeBSD_kernel__)
 830     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 831 # endif
 832 # if defined(__NetBSD__)
 833     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 834 # endif
 835 # if defined(__OpenBSD__)
 836     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 837 # endif
 838 #endif
 839
 840     /* TinyCC & gcc defines */
 841 #if PTR_SIZE == 4
 842     /* 32bit systems. */
 843     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
 844     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
 845     tcc_define_symbol(s, "__ILP32__", NULL);
 846 #elif LONG_SIZE == 4
 847     /* 64bit Windows. */
 848     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 849     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 850     tcc_define_symbol(s, "__LLP64__", NULL);
 851 #else
 852     /* Other 64bit systems. */
 853     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 854     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 855     tcc_define_symbol(s, "__LP64__", NULL);
 856 #endif
 857
 858 #ifdef TCC_TARGET_PE
 859     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 860     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 861 #else
 862     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 863     /* wint_t is unsigned int by default, but (signed) int on BSDs
 864        and unsigned short on windows.  Other OSes might have still
 865        other conventions, sigh.  */
 866 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 867   || defined(__NetBSD__) || defined(__OpenBSD__)
 868     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 869 #  ifdef __FreeBSD__
 870     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 871        that are unconditionally used in FreeBSDs other system headers :/ */
 872     tcc_define_symbol(s, "__GNUC__", "2");
 873     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 874     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 875 #  endif
 876 # else
 877     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 878     /* glibc defines */
 879     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 880         "name proto __asm__ (#alias)");
 881     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 882         "name proto __asm__ (#alias) __THROW");
 883 # endif
 884 # if defined(TCC_MUSL)
 885     tcc_define_symbol(s, "__DEFINED_va_list", "");
 886     tcc_define_symbol(s, "__DEFINED___isoc_va_list", "");
 887     tcc_define_symbol(s, "__isoc_va_list", "void *");
 888 # endif /* TCC_MUSL */
 889     /* Some GCC builtins that are simple to express as macros.  */
 890     tcc_define_symbol(s, "__builtin_extract_return_addr(x)", "x");
 891 #endif /* ndef TCC_TARGET_PE */
 892     return s;
 893 }
 894
 895 LIBTCCAPI void tcc_delete(TCCState *s1)
 896 {
 897     tcc_cleanup();
 898
 899     /* free sections */
 900     tccelf_delete(s1);
 901
 902     /* free library paths */
 903     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 904     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 905
 906     /* free include paths */
 907     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
 908     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 909     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 910     dynarray_reset(&s1->cmd_include_files, &s1->nb_cmd_include_files);
 911
 912     tcc_free(s1->tcc_lib_path);
 913     tcc_free(s1->soname);
 914     tcc_free(s1->rpath);
 915     tcc_free(s1->init_symbol);
 916     tcc_free(s1->fini_symbol);
 917     tcc_free(s1->outfile);
 918     tcc_free(s1->deps_outfile);
 919     dynarray_reset(&s1->files, &s1->nb_files);
 920     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 921     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 922     dynarray_reset(&s1->argv, &s1->argc);
 923
 924 #ifdef TCC_IS_NATIVE
 925     /* free runtime memory */
 926     tcc_run_free(s1);
 927 #endif
 928
 929     tcc_free(s1);
 930     if (0 == --nb_states)
 931         tcc_memcheck();
 932 }
 933
 934 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 935 {
 936     s->output_type = output_type;
 937
 938     /* always elf for objects */
 939     if (output_type == TCC_OUTPUT_OBJ)
 940         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 941
 942     if (s->char_is_unsigned)
 943         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 944
 945     if (!s->nostdinc) {
 946         /* default include paths */
 947         /* -isystem paths have already been handled */
 948         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 949     }
 950
 951 #ifdef CONFIG_TCC_BCHECK
 952     if (s->do_bounds_check) {
 953         /* if bound checking, then add corresponding sections */
 954         tccelf_bounds_new(s);
 955         /* define symbol */
 956         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 957     }
 958 #endif
 959     if (s->do_debug) {
 960         /* add debug sections */
 961         tccelf_stab_new(s);
 962     }
 963
 964     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 965
 966 #ifdef TCC_TARGET_PE
 967 # ifdef _WIN32
 968     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
 969         tcc_add_systemdir(s);
 970 # endif
 971 #else
 972     /* paths for crt objects */
 973     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 974     /* add libc crt1/crti objects */
 975     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
 976         !s->nostdlib) {
 977         if (output_type != TCC_OUTPUT_DLL)
 978             tcc_add_crt(s, "crt1.o");
 979         tcc_add_crt(s, "crti.o");
 980     }
 981 #endif
 982     return 0;
 983 }
 984
 985 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 986 {
 987     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
 988     return 0;
 989 }
 990
 991 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
 992 {
 993     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
 994     return 0;
 995 }
 996
 997 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
 998 {
 999     int ret;
1000
1001     /* open the file */
1002     ret = tcc_open(s1, filename);
1003     if (ret < 0) {
1004         if (flags & AFF_PRINT_ERROR)
1005             tcc_error_noabort("file '%s' not found", filename);
1006         return ret;
1007     }
1008
1009     /* update target deps */
1010     dynarray_add(&s1->target_deps, &s1->nb_target_deps,
1011             tcc_strdup(filename));
1012
1013     if (flags & AFF_TYPE_BIN) {
1014         ElfW(Ehdr) ehdr;
1015         int fd, obj_type;
1016
1017         fd = file->fd;
1018         obj_type = tcc_object_type(fd, &ehdr);
1019         lseek(fd, 0, SEEK_SET);
1020
1021 #ifdef TCC_TARGET_MACHO
1022         if (0 == obj_type && 0 == strcmp(tcc_fileextension(filename), ".dylib"))
1023             obj_type = AFF_BINTYPE_DYN;
1024 #endif
1025
1026         switch (obj_type) {
1027         case AFF_BINTYPE_REL:
1028             ret = tcc_load_object_file(s1, fd, 0);
1029             break;
1030 #ifndef TCC_TARGET_PE
1031         case AFF_BINTYPE_DYN:
1032             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1033                 ret = 0;
1034 #ifdef TCC_IS_NATIVE
1035                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1036                     ret = -1;
1037 #endif
1038             } else {
1039                 ret = tcc_load_dll(s1, fd, filename,
1040                                    (flags & AFF_REFERENCED_DLL) != 0);
1041             }
1042             break;
1043 #endif
1044         case AFF_BINTYPE_AR:
1045             ret = tcc_load_archive(s1, fd);
1046             break;
1047 #ifdef TCC_TARGET_COFF
1048         case AFF_BINTYPE_C67:
1049             ret = tcc_load_coff(s1, fd);
1050             break;
1051 #endif
1052         default:
1053 #ifdef TCC_TARGET_PE
1054             ret = pe_load_file(s1, filename, fd);
1055 #else
1056             /* as GNU ld, consider it is an ld script if not recognized */
1057             ret = tcc_load_ldscript(s1);
1058 #endif
1059             if (ret < 0)
1060                 tcc_error_noabort("unrecognized file type");
1061             break;
1062         }
1063     } else {
1064         ret = tcc_compile(s1);
1065     }
1066     tcc_close();
1067     return ret;
1068 }
1069
1070 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1071 {
1072     int filetype = s->filetype;
1073     int flags = AFF_PRINT_ERROR;
1074     if (filetype == 0) {
1075         /* use a file extension to detect a filetype */
1076         const char *ext = tcc_fileextension(filename);
1077         if (ext[0]) {
1078             ext++;
1079             if (!strcmp(ext, "S"))
1080                 filetype = AFF_TYPE_ASMPP;
1081             else if (!strcmp(ext, "s"))
1082                 filetype = AFF_TYPE_ASM;
1083             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1084                 filetype = AFF_TYPE_C;
1085             else
1086                 flags |= AFF_TYPE_BIN;
1087         } else {
1088             filetype = AFF_TYPE_C;
1089         }
1090         s->filetype = filetype;
1091     }
1092     return tcc_add_file_internal(s, filename, flags);
1093 }
1094
1095 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1096 {
1097     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1098     return 0;
1099 }
1100
1101 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1102     const char *filename, int flags, char **paths, int nb_paths)
1103 {
1104     char buf[1024];
1105     int i;
1106
1107     for(i = 0; i < nb_paths; i++) {
1108         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1109         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1110             return 0;
1111     }
1112     return -1;
1113 }
1114
1115 /* find and load a dll. Return non zero if not found */
1116 /* XXX: add '-rpath' option support ? */
1117 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1118 {
1119     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1120         s->library_paths, s->nb_library_paths);
1121 }
1122
1123 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1124 {
1125     if (-1 == tcc_add_library_internal(s, "%s/%s",
1126         filename, 0, s->crt_paths, s->nb_crt_paths))
1127         tcc_error_noabort("file '%s' not found", filename);
1128     return 0;
1129 }
1130
1131 /* the library name is the same as the argument of the '-l' option */
1132 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1133 {
1134 #if defined TCC_TARGET_PE
1135     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1136     const char **pp = s->static_link ? libs + 4 : libs;
1137 #elif defined TCC_TARGET_MACHO
1138     const char *libs[] = { "%s/lib%s.dylib", "%s/lib%s.a", NULL };
1139     const char **pp = s->static_link ? libs + 1 : libs;
1140 #else
1141     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1142     const char **pp = s->static_link ? libs + 1 : libs;
1143 #endif
1144     while (*pp) {
1145         if (0 == tcc_add_library_internal(s, *pp,
1146             libraryname, 0, s->library_paths, s->nb_library_paths))
1147             return 0;
1148         ++pp;
1149     }
1150     return -1;
1151 }
1152
1153 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1154 {
1155     int ret = tcc_add_library(s, libname);
1156     if (ret < 0)
1157         tcc_error_noabort("library '%s' not found", libname);
1158     return ret;
1159 }
1160
1161 /* handle #pragma comment(lib,) */
1162 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1163 {
1164     int i;
1165     for (i = 0; i < s1->nb_pragma_libs; i++)
1166         tcc_add_library_err(s1, s1->pragma_libs[i]);
1167 }
1168
1169 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1170 {
1171 #ifdef TCC_TARGET_PE
1172     /* On x86_64 'val' might not be reachable with a 32bit offset.
1173        So it is handled here as if it were in a DLL. */
1174     pe_putimport(s, 0, name, (uintptr_t)val);
1175 #else
1176     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1177         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1178         SHN_ABS, name);
1179 #endif
1180     return 0;
1181 }
1182
1183 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1184 {
1185     tcc_free(s->tcc_lib_path);
1186     s->tcc_lib_path = tcc_strdup(path);
1187 }
1188
1189 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1190 #define FD_INVERT 0x0002 /* invert value before storing */
1191
1192 typedef struct FlagDef {
1193     uint16_t offset;
1194     uint16_t flags;
1195     const char *name;
1196 } FlagDef;
1197
1198 static int no_flag(const char **pp)
1199 {
1200     const char *p = *pp;
1201     if (*p != 'n' || *++p != 'o' || *++p != '-')
1202         return 0;
1203     *pp = p + 1;
1204     return 1;
1205 }
1206
1207 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1208 {
1209     int value, ret;
1210     const FlagDef *p;
1211     const char *r;
1212
1213     value = 1;
1214     r = name;
1215     if (no_flag(&r))
1216         value = 0;
1217
1218     for (ret = -1, p = flags; p->name; ++p) {
1219         if (ret) {
1220             if (strcmp(r, p->name))
1221                 continue;
1222         } else {
1223             if (0 == (p->flags & WD_ALL))
1224                 continue;
1225         }
1226         if (p->offset) {
1227             *(int*)((char *)s + p->offset) =
1228                 p->flags & FD_INVERT ? !value : value;
1229             if (ret)
1230                 return 0;
1231         } else {
1232             ret = 0;
1233         }
1234     }
1235     return ret;
1236 }
1237
1238 static int strstart(const char *val, const char **str)
1239 {
1240     const char *p, *q;
1241     p = *str;
1242     q = val;
1243     while (*q) {
1244         if (*p != *q)
1245             return 0;
1246         p++;
1247         q++;
1248     }
1249     *str = p;
1250     return 1;
1251 }
1252
1253 /* Like strstart, but automatically takes into account that ld options can
1254  *
1255  * - start with double or single dash (e.g. '--soname' or '-soname')
1256  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1257  *   or '-Wl,-soname=x.so')
1258  *
1259  * you provide `val` always in 'option[=]' form (no leading -)
1260  */
1261 static int link_option(const char *str, const char *val, const char **ptr)
1262 {
1263     const char *p, *q;
1264     int ret;
1265
1266     /* there should be 1 or 2 dashes */
1267     if (*str++ != '-')
1268         return 0;
1269     if (*str == '-')
1270         str++;
1271
1272     /* then str & val should match (potentially up to '=') */
1273     p = str;
1274     q = val;
1275
1276     ret = 1;
1277     if (q[0] == '?') {
1278         ++q;
1279         if (no_flag(&p))
1280             ret = -1;
1281     }
1282
1283     while (*q != '\0' && *q != '=') {
1284         if (*p != *q)
1285             return 0;
1286         p++;
1287         q++;
1288     }
1289
1290     /* '=' near eos means ',' or '=' is ok */
1291     if (*q == '=') {
1292         if (*p == 0)
1293             *ptr = p;
1294         if (*p != ',' && *p != '=')
1295             return 0;
1296         p++;
1297     } else if (*p) {
1298         return 0;
1299     }
1300     *ptr = p;
1301     return ret;
1302 }
1303
1304 static const char *skip_linker_arg(const char **str)
1305 {
1306     const char *s1 = *str;
1307     const char *s2 = strchr(s1, ',');
1308     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1309     return s2;
1310 }
1311
1312 static void copy_linker_arg(char **pp, const char *s, int sep)
1313 {
1314     const char *q = s;
1315     char *p = *pp;
1316     int l = 0;
1317     if (p && sep)
1318         p[l = strlen(p)] = sep, ++l;
1319     skip_linker_arg(&q);
1320     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1321 }
1322
1323 /* set linker options */
1324 static int tcc_set_linker(TCCState *s, const char *option)
1325 {
1326     while (*option) {
1327
1328         const char *p = NULL;
1329         char *end = NULL;
1330         int ignoring = 0;
1331         int ret;
1332
1333         if (link_option(option, "Bsymbolic", &p)) {
1334             s->symbolic = 1;
1335         } else if (link_option(option, "nostdlib", &p)) {
1336             s->nostdlib = 1;
1337         } else if (link_option(option, "fini=", &p)) {
1338             copy_linker_arg(&s->fini_symbol, p, 0);
1339             ignoring = 1;
1340         } else if (link_option(option, "image-base=", &p)
1341                 || link_option(option, "Ttext=", &p)) {
1342             s->text_addr = strtoull(p, &end, 16);
1343             s->has_text_addr = 1;
1344         } else if (link_option(option, "init=", &p)) {
1345             copy_linker_arg(&s->init_symbol, p, 0);
1346             ignoring = 1;
1347         } else if (link_option(option, "oformat=", &p)) {
1348 #if defined(TCC_TARGET_PE)
1349             if (strstart("pe-", &p)) {
1350 #elif PTR_SIZE == 8
1351             if (strstart("elf64-", &p)) {
1352 #else
1353             if (strstart("elf32-", &p)) {
1354 #endif
1355                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1356             } else if (!strcmp(p, "binary")) {
1357                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1358 #ifdef TCC_TARGET_COFF
1359             } else if (!strcmp(p, "coff")) {
1360                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1361 #endif
1362             } else
1363                 goto err;
1364
1365         } else if (link_option(option, "as-needed", &p)) {
1366             ignoring = 1;
1367         } else if (link_option(option, "O", &p)) {
1368             ignoring = 1;
1369         } else if (link_option(option, "export-all-symbols", &p)) {
1370             s->rdynamic = 1;
1371         } else if (link_option(option, "rpath=", &p)) {
1372             copy_linker_arg(&s->rpath, p, ':');
1373         } else if (link_option(option, "enable-new-dtags", &p)) {
1374             s->enable_new_dtags = 1;
1375         } else if (link_option(option, "section-alignment=", &p)) {
1376             s->section_align = strtoul(p, &end, 16);
1377         } else if (link_option(option, "soname=", &p)) {
1378             copy_linker_arg(&s->soname, p, 0);
1379 #ifdef TCC_TARGET_PE
1380         } else if (link_option(option, "large-address-aware", &p)) {
1381             s->pe_characteristics |= 0x20;
1382         } else if (link_option(option, "file-alignment=", &p)) {
1383             s->pe_file_align = strtoul(p, &end, 16);
1384         } else if (link_option(option, "stack=", &p)) {
1385             s->pe_stack_size = strtoul(p, &end, 10);
1386         } else if (link_option(option, "subsystem=", &p)) {
1387 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1388             if (!strcmp(p, "native")) {
1389                 s->pe_subsystem = 1;
1390             } else if (!strcmp(p, "console")) {
1391                 s->pe_subsystem = 3;
1392             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1393                 s->pe_subsystem = 2;
1394             } else if (!strcmp(p, "posix")) {
1395                 s->pe_subsystem = 7;
1396             } else if (!strcmp(p, "efiapp")) {
1397                 s->pe_subsystem = 10;
1398             } else if (!strcmp(p, "efiboot")) {
1399                 s->pe_subsystem = 11;
1400             } else if (!strcmp(p, "efiruntime")) {
1401                 s->pe_subsystem = 12;
1402             } else if (!strcmp(p, "efirom")) {
1403                 s->pe_subsystem = 13;
1404 #elif defined(TCC_TARGET_ARM)
1405             if (!strcmp(p, "wince")) {
1406                 s->pe_subsystem = 9;
1407 #endif
1408             } else
1409                 goto err;
1410 #endif
1411         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1412             s->alacarte_link = ret < 0;
1413         } else if (p) {
1414             return 0;
1415         } else {
1416     err:
1417             tcc_error("unsupported linker option '%s'", option);
1418         }
1419
1420         if (ignoring && s->warn_unsupported)
1421             tcc_warning("unsupported linker option '%s'", option);
1422
1423         option = skip_linker_arg(&p);
1424     }
1425     return 1;
1426 }
1427
1428 typedef struct TCCOption {
1429     const char *name;
1430     uint16_t index;
1431     uint16_t flags;
1432 } TCCOption;
1433
1434 enum {
1435     TCC_OPTION_HELP,
1436     TCC_OPTION_HELP2,
1437     TCC_OPTION_v,
1438     TCC_OPTION_I,
1439     TCC_OPTION_D,
1440     TCC_OPTION_U,
1441     TCC_OPTION_P,
1442     TCC_OPTION_L,
1443     TCC_OPTION_B,
1444     TCC_OPTION_l,
1445     TCC_OPTION_bench,
1446     TCC_OPTION_bt,
1447     TCC_OPTION_b,
1448     TCC_OPTION_g,
1449     TCC_OPTION_c,
1450     TCC_OPTION_dumpversion,
1451     TCC_OPTION_d,
1452     TCC_OPTION_static,
1453     TCC_OPTION_std,
1454     TCC_OPTION_shared,
1455     TCC_OPTION_soname,
1456     TCC_OPTION_o,
1457     TCC_OPTION_r,
1458     TCC_OPTION_s,
1459     TCC_OPTION_traditional,
1460     TCC_OPTION_Wl,
1461     TCC_OPTION_Wp,
1462     TCC_OPTION_W,
1463     TCC_OPTION_O,
1464     TCC_OPTION_mfloat_abi,
1465     TCC_OPTION_m,
1466     TCC_OPTION_f,
1467     TCC_OPTION_isystem,
1468     TCC_OPTION_iwithprefix,
1469     TCC_OPTION_include,
1470     TCC_OPTION_nostdinc,
1471     TCC_OPTION_nostdlib,
1472     TCC_OPTION_print_search_dirs,
1473     TCC_OPTION_rdynamic,
1474     TCC_OPTION_param,
1475     TCC_OPTION_pedantic,
1476     TCC_OPTION_pthread,
1477     TCC_OPTION_run,
1478     TCC_OPTION_w,
1479     TCC_OPTION_pipe,
1480     TCC_OPTION_E,
1481     TCC_OPTION_MD,
1482     TCC_OPTION_MF,
1483     TCC_OPTION_x,
1484     TCC_OPTION_ar,
1485     TCC_OPTION_impdef
1486 };
1487
1488 #define TCC_OPTION_HAS_ARG 0x0001
1489 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1490
1491 static const TCCOption tcc_options[] = {
1492     { "h", TCC_OPTION_HELP, 0 },
1493     { "-help", TCC_OPTION_HELP, 0 },
1494     { "?", TCC_OPTION_HELP, 0 },
1495     { "hh", TCC_OPTION_HELP2, 0 },
1496     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1497     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1498     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1499     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1500     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1501     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1502     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1503     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1504     { "bench", TCC_OPTION_bench, 0 },
1505 #ifdef CONFIG_TCC_BACKTRACE
1506     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1507 #endif
1508 #ifdef CONFIG_TCC_BCHECK
1509     { "b", TCC_OPTION_b, 0 },
1510 #endif
1511     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1512     { "c", TCC_OPTION_c, 0 },
1513     { "dumpversion", TCC_OPTION_dumpversion, 0},
1514     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1515     { "static", TCC_OPTION_static, 0 },
1516     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1517     { "shared", TCC_OPTION_shared, 0 },
1518     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1519     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1520     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1521     { "pedantic", TCC_OPTION_pedantic, 0},
1522     { "pthread", TCC_OPTION_pthread, 0},
1523     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1524     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1525     { "r", TCC_OPTION_r, 0 },
1526     { "s", TCC_OPTION_s, 0 },
1527     { "traditional", TCC_OPTION_traditional, 0 },
1528     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1529     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1530     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1531     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1532 #ifdef TCC_TARGET_ARM
1533     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1534 #endif
1535     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1536     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1537     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1538     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1539     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1540     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1541     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1542     { "w", TCC_OPTION_w, 0 },
1543     { "pipe", TCC_OPTION_pipe, 0},
1544     { "E", TCC_OPTION_E, 0},
1545     { "MD", TCC_OPTION_MD, 0},
1546     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1547     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1548     { "ar", TCC_OPTION_ar, 0},
1549 #ifdef TCC_TARGET_PE
1550     { "impdef", TCC_OPTION_impdef, 0},
1551 #endif
1552     { NULL, 0, 0 },
1553 };
1554
1555 static const FlagDef options_W[] = {
1556     { 0, 0, "all" },
1557     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1558     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1559     { offsetof(TCCState, warn_error), 0, "error" },
1560     { offsetof(TCCState, warn_gcc_compat), 0, "gcc-compat" },
1561     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1562       "implicit-function-declaration" },
1563     { 0, 0, NULL }
1564 };
1565
1566 static const FlagDef options_f[] = {
1567     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1568     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1569     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1570     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1571     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1572     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1573     { 0, 0, NULL }
1574 };
1575
1576 static const FlagDef options_m[] = {
1577     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1578 #ifdef TCC_TARGET_X86_64
1579     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1580 #endif
1581     { 0, 0, NULL }
1582 };
1583
1584 static void parse_option_D(TCCState *s1, const char *optarg)
1585 {
1586     char *sym = tcc_strdup(optarg);
1587     char *value = strchr(sym, '=');
1588     if (value)
1589         *value++ = '\0';
1590     tcc_define_symbol(s1, sym, value);
1591     tcc_free(sym);
1592 }
1593
1594 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1595 {
1596     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1597     f->type = filetype;
1598     f->alacarte = s->alacarte_link;
1599     strcpy(f->name, filename);
1600     dynarray_add(&s->files, &s->nb_files, f);
1601 }
1602
1603 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1604 {
1605     int ret = 0, q, c;
1606     CString str;
1607     for(;;) {
1608         while (c = (unsigned char)*r, c && c <= ' ')
1609             ++r;
1610         if (c == 0)
1611             break;
1612         q = 0;
1613         cstr_new(&str);
1614         while (c = (unsigned char)*r, c) {
1615             ++r;
1616             if (c == '\\' && (*r == '"' || *r == '\\')) {
1617                 c = *r++;
1618             } else if (c == '"') {
1619                 q = !q;
1620                 continue;
1621             } else if (q == 0 && c <= ' ') {
1622                 break;
1623             }
1624             cstr_ccat(&str, c);
1625         }
1626         cstr_ccat(&str, 0);
1627         //printf("<%s>\n", str.data), fflush(stdout);
1628         dynarray_add(argv, argc, tcc_strdup(str.data));
1629         cstr_free(&str);
1630         ++ret;
1631     }
1632     return ret;
1633 }
1634
1635 /* read list file */
1636 static void args_parser_listfile(TCCState *s,
1637     const char *filename, int optind, int *pargc, char ***pargv)
1638 {
1639     int fd, i;
1640     size_t len;
1641     char *p;
1642     int argc = 0;
1643     char **argv = NULL;
1644
1645     fd = open(filename, O_RDONLY | O_BINARY);
1646     if (fd < 0)
1647         tcc_error("listfile '%s' not found", filename);
1648
1649     len = lseek(fd, 0, SEEK_END);
1650     p = tcc_malloc(len + 1), p[len] = 0;
1651     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1652
1653     for (i = 0; i < *pargc; ++i)
1654         if (i == optind)
1655             args_parser_make_argv(p, &argc, &argv);
1656         else
1657             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1658
1659     tcc_free(p);
1660     dynarray_reset(&s->argv, &s->argc);
1661     *pargc = s->argc = argc, *pargv = s->argv = argv;
1662 }
1663
1664 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1665 {
1666     const TCCOption *popt;
1667     const char *optarg, *r;
1668     const char *run = NULL;
1669     int last_o = -1;
1670     int x;
1671     CString linker_arg; /* collect -Wl options */
1672     int tool = 0, arg_start = 0, noaction = optind;
1673     char **argv = *pargv;
1674     int argc = *pargc;
1675
1676     cstr_new(&linker_arg);
1677
1678     while (optind < argc) {
1679         r = argv[optind];
1680         if (r[0] == '@' && r[1] != '\0') {
1681             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1682             continue;
1683         }
1684         optind++;
1685         if (tool) {
1686             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1687                 ++s->verbose;
1688             continue;
1689         }
1690 reparse:
1691         if (r[0] != '-' || r[1] == '\0') {
1692             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1693                 args_parser_add_file(s, r, s->filetype);
1694             if (run) {
1695                 tcc_set_options(s, run);
1696                 arg_start = optind - 1;
1697                 break;
1698             }
1699             continue;
1700         }
1701
1702         /* find option in table */
1703         for(popt = tcc_options; ; ++popt) {
1704             const char *p1 = popt->name;
1705             const char *r1 = r + 1;
1706             if (p1 == NULL)
1707                 tcc_error("invalid option -- '%s'", r);
1708             if (!strstart(p1, &r1))
1709                 continue;
1710             optarg = r1;
1711             if (popt->flags & TCC_OPTION_HAS_ARG) {
1712                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1713                     if (optind >= argc)
1714                 arg_err:
1715                         tcc_error("argument to '%s' is missing", r);
1716                     optarg = argv[optind++];
1717                 }
1718             } else if (*r1 != '\0')
1719                 continue;
1720             break;
1721         }
1722
1723         switch(popt->index) {
1724         case TCC_OPTION_HELP:
1725             return OPT_HELP;
1726         case TCC_OPTION_HELP2:
1727             return OPT_HELP2;
1728         case TCC_OPTION_I:
1729             tcc_add_include_path(s, optarg);
1730             break;
1731         case TCC_OPTION_D:
1732             parse_option_D(s, optarg);
1733             break;
1734         case TCC_OPTION_U:
1735             tcc_undefine_symbol(s, optarg);
1736             break;
1737         case TCC_OPTION_L:
1738             tcc_add_library_path(s, optarg);
1739             break;
1740         case TCC_OPTION_B:
1741             /* set tcc utilities path (mainly for tcc development) */
1742             tcc_set_lib_path(s, optarg);
1743             break;
1744         case TCC_OPTION_l:
1745             args_parser_add_file(s, optarg, AFF_TYPE_LIB);
1746             s->nb_libraries++;
1747             break;
1748         case TCC_OPTION_pthread:
1749             parse_option_D(s, "_REENTRANT");
1750             s->option_pthread = 1;
1751             break;
1752         case TCC_OPTION_bench:
1753             s->do_bench = 1;
1754             break;
1755 #ifdef CONFIG_TCC_BACKTRACE
1756         case TCC_OPTION_bt:
1757             tcc_set_num_callers(atoi(optarg));
1758             break;
1759 #endif
1760 #ifdef CONFIG_TCC_BCHECK
1761         case TCC_OPTION_b:
1762             s->do_bounds_check = 1;
1763             s->do_debug = 1;
1764             break;
1765 #endif
1766         case TCC_OPTION_g:
1767             s->do_debug = 1;
1768             break;
1769         case TCC_OPTION_c:
1770             x = TCC_OUTPUT_OBJ;
1771         set_output_type:
1772             if (s->output_type)
1773                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1774             s->output_type = x;
1775             break;
1776         case TCC_OPTION_d:
1777             if (*optarg == 'D')
1778                 s->dflag = 3;
1779             else if (*optarg == 'M')
1780                 s->dflag = 7;
1781             else if (*optarg == 't')
1782                 s->dflag = 16;
1783             else if (isnum(*optarg))
1784                 g_debug = atoi(optarg);
1785             else
1786                 goto unsupported_option;
1787             break;
1788         case TCC_OPTION_static:
1789             s->static_link = 1;
1790             break;
1791         case TCC_OPTION_std:
1792             /* silently ignore, a current purpose:
1793                allow to use a tcc as a reference compiler for "make test" */
1794             break;
1795         case TCC_OPTION_shared:
1796             x = TCC_OUTPUT_DLL;
1797             goto set_output_type;
1798         case TCC_OPTION_soname:
1799             s->soname = tcc_strdup(optarg);
1800             break;
1801         case TCC_OPTION_o:
1802             if (s->outfile) {
1803                 tcc_warning("multiple -o option");
1804                 tcc_free(s->outfile);
1805             }
1806             s->outfile = tcc_strdup(optarg);
1807             break;
1808         case TCC_OPTION_r:
1809             /* generate a .o merging several output files */
1810             s->option_r = 1;
1811             x = TCC_OUTPUT_OBJ;
1812             goto set_output_type;
1813         case TCC_OPTION_isystem:
1814             tcc_add_sysinclude_path(s, optarg);
1815             break;
1816         case TCC_OPTION_include:
1817             dynarray_add(&s->cmd_include_files,
1818                          &s->nb_cmd_include_files, tcc_strdup(optarg));
1819             break;
1820         case TCC_OPTION_nostdinc:
1821             s->nostdinc = 1;
1822             break;
1823         case TCC_OPTION_nostdlib:
1824             s->nostdlib = 1;
1825             break;
1826         case TCC_OPTION_run:
1827 #ifndef TCC_IS_NATIVE
1828             tcc_error("-run is not available in a cross compiler");
1829 #endif
1830             run = optarg;
1831             x = TCC_OUTPUT_MEMORY;
1832             goto set_output_type;
1833         case TCC_OPTION_v:
1834             do ++s->verbose; while (*optarg++ == 'v');
1835             ++noaction;
1836             break;
1837         case TCC_OPTION_f:
1838             if (set_flag(s, options_f, optarg) < 0)
1839                 goto unsupported_option;
1840             break;
1841 #ifdef TCC_TARGET_ARM
1842         case TCC_OPTION_mfloat_abi:
1843             /* tcc doesn't support soft float yet */
1844             if (!strcmp(optarg, "softfp")) {
1845                 s->float_abi = ARM_SOFTFP_FLOAT;
1846                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1847             } else if (!strcmp(optarg, "hard"))
1848                 s->float_abi = ARM_HARD_FLOAT;
1849             else
1850                 tcc_error("unsupported float abi '%s'", optarg);
1851             break;
1852 #endif
1853         case TCC_OPTION_m:
1854             if (set_flag(s, options_m, optarg) < 0) {
1855                 if (x = atoi(optarg), x != 32 && x != 64)
1856                     goto unsupported_option;
1857                 if (PTR_SIZE != x/8)
1858                     return x;
1859                 ++noaction;
1860             }
1861             break;
1862         case TCC_OPTION_W:
1863             if (set_flag(s, options_W, optarg) < 0)
1864                 goto unsupported_option;
1865             break;
1866         case TCC_OPTION_w:
1867             s->warn_none = 1;
1868             break;
1869         case TCC_OPTION_rdynamic:
1870             s->rdynamic = 1;
1871             break;
1872         case TCC_OPTION_Wl:
1873             if (linker_arg.size)
1874                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1875             cstr_cat(&linker_arg, optarg, 0);
1876             if (tcc_set_linker(s, linker_arg.data))
1877                 cstr_free(&linker_arg);
1878             break;
1879         case TCC_OPTION_Wp:
1880             r = optarg;
1881             goto reparse;
1882         case TCC_OPTION_E:
1883             x = TCC_OUTPUT_PREPROCESS;
1884             goto set_output_type;
1885         case TCC_OPTION_P:
1886             s->Pflag = atoi(optarg) + 1;
1887             break;
1888         case TCC_OPTION_MD:
1889             s->gen_deps = 1;
1890             break;
1891         case TCC_OPTION_MF:
1892             s->deps_outfile = tcc_strdup(optarg);
1893             break;
1894         case TCC_OPTION_dumpversion:
1895             printf ("%s\n", TCC_VERSION);
1896             exit(0);
1897             break;
1898         case TCC_OPTION_x:
1899             if (*optarg == 'c')
1900                 s->filetype = AFF_TYPE_C;
1901             else if (*optarg == 'a')
1902                 s->filetype = AFF_TYPE_ASMPP;
1903             else if (*optarg == 'n')
1904                 s->filetype = AFF_TYPE_NONE;
1905             else
1906                 tcc_warning("unsupported language '%s'", optarg);
1907             break;
1908         case TCC_OPTION_O:
1909             last_o = atoi(optarg);
1910             break;
1911         case TCC_OPTION_print_search_dirs:
1912             x = OPT_PRINT_DIRS;
1913             goto extra_action;
1914         case TCC_OPTION_impdef:
1915             x = OPT_IMPDEF;
1916             goto extra_action;
1917         case TCC_OPTION_ar:
1918             x = OPT_AR;
1919         extra_action:
1920             arg_start = optind - 1;
1921             if (arg_start != noaction)
1922                 tcc_error("cannot parse %s here", r);
1923             tool = x;
1924             break;
1925         case TCC_OPTION_traditional:
1926         case TCC_OPTION_pedantic:
1927         case TCC_OPTION_pipe:
1928         case TCC_OPTION_s:
1929             /* ignored */
1930             break;
1931         default:
1932 unsupported_option:
1933             if (s->warn_unsupported)
1934                 tcc_warning("unsupported option '%s'", r);
1935             break;
1936         }
1937     }
1938     if (last_o > 0)
1939         tcc_define_symbol(s, "__OPTIMIZE__", NULL);
1940     if (linker_arg.size) {
1941         r = linker_arg.data;
1942         goto arg_err;
1943     }
1944     *pargc = argc - arg_start;
1945     *pargv = argv + arg_start;
1946     if (tool)
1947         return tool;
1948     if (optind != noaction)
1949         return 0;
1950     if (s->verbose == 2)
1951         return OPT_PRINT_DIRS;
1952     if (s->verbose)
1953         return OPT_V;
1954     return OPT_HELP;
1955 }
1956
1957 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
1958 {
1959     char **argv = NULL;
1960     int argc = 0;
1961     args_parser_make_argv(r, &argc, &argv);
1962     tcc_parse_args(s, &argc, &argv, 0);
1963     dynarray_reset(&argv, &argc);
1964 }
1965
1966 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time)
1967 {
1968     if (total_time < 1)
1969         total_time = 1;
1970     if (total_bytes < 1)
1971         total_bytes = 1;
1972     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
1973                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
1974            tok_ident - TOK_IDENT, total_lines, total_bytes,
1975            (double)total_time/1000,
1976            (unsigned)total_lines*1000/total_time,
1977            (double)total_bytes/1000/total_time);
1978 #ifdef MEM_DEBUG
1979     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
1980 #endif
1981 }