libtcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 static int nb_states;
  36
  37 /********************************************************/
  38
  39 #ifdef ONE_SOURCE
  40 #include "tccpp.c"
  41 #include "tccgen.c"
  42 #include "tccelf.c"
  43 #include "tccrun.c"
  44 #ifdef TCC_TARGET_I386
  45 #include "i386-gen.c"
  46 #include "i386-link.c"
  47 #endif
  48 #ifdef TCC_TARGET_ARM
  49 #include "arm-gen.c"
  50 #include "arm-link.c"
  51 #endif
  52 #ifdef TCC_TARGET_ARM64
  53 #include "arm64-gen.c"
  54 #include "arm64-link.c"
  55 #endif
  56 #ifdef TCC_TARGET_C67
  57 #include "c67-gen.c"
  58 #include "c67-link.c"
  59 #endif
  60 #ifdef TCC_TARGET_X86_64
  61 #include "x86_64-gen.c"
  62 #include "x86_64-link.c"
  63 #endif
  64 #ifdef CONFIG_TCC_ASM
  65 #include "tccasm.c"
  66 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  67 #include "i386-asm.c"
  68 #endif
  69 #endif
  70 #ifdef TCC_TARGET_COFF
  71 #include "tcccoff.c"
  72 #endif
  73 #ifdef TCC_TARGET_PE
  74 #include "tccpe.c"
  75 #endif
  76 #endif /* ONE_SOURCE */
  77
  78 /********************************************************/
  79 #ifndef CONFIG_TCC_ASM
  80 ST_FUNC void asm_instr(void)
  81 {
  82     tcc_error("inline asm() not supported");
  83 }
  84 ST_FUNC void asm_global_instr(void)
  85 {
  86     tcc_error("inline asm() not supported");
  87 }
  88 #endif
  89
  90 /********************************************************/
  91 #ifdef _WIN32
  92 ST_FUNC char *normalize_slashes(char *path)
  93 {
  94     char *p;
  95     for (p = path; *p; ++p)
  96         if (*p == '\\')
  97             *p = '/';
  98     return path;
  99 }
 100
 101 static HMODULE tcc_module;
 102
 103 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 104 static void tcc_set_lib_path_w32(TCCState *s)
 105 {
 106     char path[1024], *p;
 107     GetModuleFileNameA(tcc_module, path, sizeof path);
 108     p = tcc_basename(normalize_slashes(strlwr(path)));
 109     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 110         p -= 5;
 111     else if (p > path)
 112         p--;
 113     *p = 0;
 114     tcc_set_lib_path(s, path);
 115 }
 116
 117 #ifdef TCC_TARGET_PE
 118 static void tcc_add_systemdir(TCCState *s)
 119 {
 120     char buf[1000];
 121     GetSystemDirectory(buf, sizeof buf);
 122     tcc_add_library_path(s, normalize_slashes(buf));
 123 }
 124 #endif
 125
 126 #ifdef LIBTCC_AS_DLL
 127 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 128 {
 129     if (DLL_PROCESS_ATTACH == dwReason)
 130         tcc_module = hDll;
 131     return TRUE;
 132 }
 133 #endif
 134 #endif
 135
 136 /********************************************************/
 137 /* copy a string and truncate it. */
 138 ST_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 139 {
 140     char *q, *q_end;
 141     int c;
 142
 143     if (buf_size > 0) {
 144         q = buf;
 145         q_end = buf + buf_size - 1;
 146         while (q < q_end) {
 147             c = *s++;
 148             if (c == '\0')
 149                 break;
 150             *q++ = c;
 151         }
 152         *q = '\0';
 153     }
 154     return buf;
 155 }
 156
 157 /* strcat and truncate. */
 158 ST_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 159 {
 160     int len;
 161     len = strlen(buf);
 162     if (len < buf_size)
 163         pstrcpy(buf + len, buf_size - len, s);
 164     return buf;
 165 }
 166
 167 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 168 {
 169     memcpy(out, in, num);
 170     out[num] = '\0';
 171     return out;
 172 }
 173
 174 /* extract the basename of a file */
 175 PUB_FUNC char *tcc_basename(const char *name)
 176 {
 177     char *p = strchr(name, 0);
 178     while (p > name && !IS_DIRSEP(p[-1]))
 179         --p;
 180     return p;
 181 }
 182
 183 /* extract extension part of a file
 184  *
 185  * (if no extension, return pointer to end-of-string)
 186  */
 187 PUB_FUNC char *tcc_fileextension (const char *name)
 188 {
 189     char *b = tcc_basename(name);
 190     char *e = strrchr(b, '.');
 191     return e ? e : strchr(b, 0);
 192 }
 193
 194 /********************************************************/
 195 /* memory management */
 196
 197 #undef free
 198 #undef malloc
 199 #undef realloc
 200
 201 #ifndef MEM_DEBUG
 202
 203 PUB_FUNC void tcc_free(void *ptr)
 204 {
 205     free(ptr);
 206 }
 207
 208 PUB_FUNC void *tcc_malloc(unsigned long size)
 209 {
 210     void *ptr;
 211     ptr = malloc(size);
 212     if (!ptr && size)
 213         tcc_error("memory full (malloc)");
 214     return ptr;
 215 }
 216
 217 PUB_FUNC void *tcc_mallocz(unsigned long size)
 218 {
 219     void *ptr;
 220     ptr = tcc_malloc(size);
 221     memset(ptr, 0, size);
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 226 {
 227     void *ptr1;
 228     ptr1 = realloc(ptr, size);
 229     if (!ptr1 && size)
 230         tcc_error("memory full (realloc)");
 231     return ptr1;
 232 }
 233
 234 PUB_FUNC char *tcc_strdup(const char *str)
 235 {
 236     char *ptr;
 237     ptr = tcc_malloc(strlen(str) + 1);
 238     strcpy(ptr, str);
 239     return ptr;
 240 }
 241
 242 PUB_FUNC void tcc_memcheck(void)
 243 {
 244 }
 245
 246 #else
 247
 248 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 249 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 250 #define MEM_DEBUG_MAGIC3 0xFEEDDEB3
 251 #define MEM_DEBUG_FILE_LEN 40
 252 #define MEM_DEBUG_CHECK3(header) \
 253     ((mem_debug_header_t*)((char*)header + header->size))->magic3
 254 #define MEM_USER_PTR(header) \
 255     ((char *)header + offsetof(mem_debug_header_t, magic3))
 256 #define MEM_HEADER_PTR(ptr) \
 257     (mem_debug_header_t *)((char*)ptr - offsetof(mem_debug_header_t, magic3))
 258
 259 struct mem_debug_header {
 260     unsigned magic1;
 261     unsigned size;
 262     struct mem_debug_header *prev;
 263     struct mem_debug_header *next;
 264     int line_num;
 265     char file_name[MEM_DEBUG_FILE_LEN + 1];
 266     unsigned magic2;
 267     __attribute__((aligned(16))) unsigned magic3;
 268 };
 269
 270 typedef struct mem_debug_header mem_debug_header_t;
 271
 272 static mem_debug_header_t *mem_debug_chain;
 273 static unsigned mem_cur_size;
 274 static unsigned mem_max_size;
 275
 276 static mem_debug_header_t *malloc_check(void *ptr, const char *msg)
 277 {
 278     mem_debug_header_t * header = MEM_HEADER_PTR(ptr);
 279     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 280         header->magic2 != MEM_DEBUG_MAGIC2 ||
 281         MEM_DEBUG_CHECK3(header) != MEM_DEBUG_MAGIC3 ||
 282         header->size == (unsigned)-1) {
 283         fprintf(stderr, "%s check failed\n", msg);
 284         if (header->magic1 == MEM_DEBUG_MAGIC1)
 285             fprintf(stderr, "%s:%u: block allocated here.\n",
 286                 header->file_name, header->line_num);
 287         exit(1);
 288     }
 289     return header;
 290 }
 291
 292 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 293 {
 294     int ofs;
 295     mem_debug_header_t *header;
 296
 297     header = malloc(sizeof(mem_debug_header_t) + size);
 298     if (!header)
 299         tcc_error("memory full (malloc)");
 300
 301     header->magic1 = MEM_DEBUG_MAGIC1;
 302     header->magic2 = MEM_DEBUG_MAGIC2;
 303     header->size = size;
 304     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 305     header->line_num = line;
 306     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 307     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 308     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 309
 310     header->next = mem_debug_chain;
 311     header->prev = NULL;
 312     if (header->next)
 313         header->next->prev = header;
 314     mem_debug_chain = header;
 315
 316     mem_cur_size += size;
 317     if (mem_cur_size > mem_max_size)
 318         mem_max_size = mem_cur_size;
 319
 320     return MEM_USER_PTR(header);
 321 }
 322
 323 PUB_FUNC void tcc_free_debug(void *ptr)
 324 {
 325     mem_debug_header_t *header;
 326     if (!ptr)
 327         return;
 328     header = malloc_check(ptr, "tcc_free");
 329     mem_cur_size -= header->size;
 330     header->size = (unsigned)-1;
 331     if (header->next)
 332         header->next->prev = header->prev;
 333     if (header->prev)
 334         header->prev->next = header->next;
 335     if (header == mem_debug_chain)
 336         mem_debug_chain = header->next;
 337     free(header);
 338 }
 339
 340 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 341 {
 342     void *ptr;
 343     ptr = tcc_malloc_debug(size,file,line);
 344     memset(ptr, 0, size);
 345     return ptr;
 346 }
 347
 348 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 349 {
 350     mem_debug_header_t *header;
 351     int mem_debug_chain_update = 0;
 352     if (!ptr)
 353         return tcc_malloc_debug(size, file, line);
 354     header = malloc_check(ptr, "tcc_realloc");
 355     mem_cur_size -= header->size;
 356     mem_debug_chain_update = (header == mem_debug_chain);
 357     header = realloc(header, sizeof(mem_debug_header_t) + size);
 358     if (!header)
 359         tcc_error("memory full (realloc)");
 360     header->size = size;
 361     MEM_DEBUG_CHECK3(header) = MEM_DEBUG_MAGIC3;
 362     if (header->next)
 363         header->next->prev = header;
 364     if (header->prev)
 365         header->prev->next = header;
 366     if (mem_debug_chain_update)
 367         mem_debug_chain = header;
 368     mem_cur_size += size;
 369     if (mem_cur_size > mem_max_size)
 370         mem_max_size = mem_cur_size;
 371     return MEM_USER_PTR(header);
 372 }
 373
 374 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 375 {
 376     char *ptr;
 377     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 378     strcpy(ptr, str);
 379     return ptr;
 380 }
 381
 382 PUB_FUNC void tcc_memcheck(void)
 383 {
 384     if (mem_cur_size) {
 385         mem_debug_header_t *header = mem_debug_chain;
 386         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 387             mem_cur_size, mem_max_size);
 388         while (header) {
 389             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 390                 header->file_name, header->line_num, header->size);
 391             header = header->next;
 392         }
 393 #if MEM_DEBUG-0 == 2
 394         exit(2);
 395 #endif
 396     }
 397 }
 398 #endif /* MEM_DEBUG */
 399
 400 #define free(p) use_tcc_free(p)
 401 #define malloc(s) use_tcc_malloc(s)
 402 #define realloc(p, s) use_tcc_realloc(p, s)
 403
 404 /********************************************************/
 405 /* dynarrays */
 406
 407 ST_FUNC void dynarray_add(void *ptab, int *nb_ptr, void *data)
 408 {
 409     int nb, nb_alloc;
 410     void **pp;
 411
 412     nb = *nb_ptr;
 413     pp = *(void ***)ptab;
 414     /* every power of two we double array size */
 415     if ((nb & (nb - 1)) == 0) {
 416         if (!nb)
 417             nb_alloc = 1;
 418         else
 419             nb_alloc = nb * 2;
 420         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 421         *(void***)ptab = pp;
 422     }
 423     pp[nb++] = data;
 424     *nb_ptr = nb;
 425 }
 426
 427 ST_FUNC void dynarray_reset(void *pp, int *n)
 428 {
 429     void **p;
 430     for (p = *(void***)pp; *n; ++p, --*n)
 431         if (*p)
 432             tcc_free(*p);
 433     tcc_free(*(void**)pp);
 434     *(void**)pp = NULL;
 435 }
 436
 437 static void tcc_split_path(TCCState *s, void *p_ary, int *p_nb_ary, const char *in)
 438 {
 439     const char *p;
 440     do {
 441         int c;
 442         CString str;
 443
 444         cstr_new(&str);
 445         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 446             if (c == '{' && p[1] && p[2] == '}') {
 447                 c = p[1], p += 2;
 448                 if (c == 'B')
 449                     cstr_cat(&str, s->tcc_lib_path, -1);
 450             } else {
 451                 cstr_ccat(&str, c);
 452             }
 453         }
 454         if (str.size) {
 455             cstr_ccat(&str, '\0');
 456             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 457         }
 458         cstr_free(&str);
 459         in = p+1;
 460     } while (*p);
 461 }
 462
 463 /********************************************************/
 464
 465 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 466 {
 467     int len;
 468     len = strlen(buf);
 469     vsnprintf(buf + len, buf_size - len, fmt, ap);
 470 }
 471
 472 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 473 {
 474     va_list ap;
 475     va_start(ap, fmt);
 476     strcat_vprintf(buf, buf_size, fmt, ap);
 477     va_end(ap);
 478 }
 479
 480 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 481 {
 482     char buf[2048];
 483     BufferedFile **pf, *f;
 484
 485     buf[0] = '\0';
 486     /* use upper file if inline ":asm:" or token ":paste:" */
 487     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 488      ;
 489     if (f) {
 490         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 491             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 492                 (*pf)->filename, (*pf)->line_num);
 493         if (f->line_num > 0) {
 494             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 495                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 496         } else {
 497             strcat_printf(buf, sizeof(buf), "%s: ",
 498                 f->filename);
 499         }
 500     } else {
 501         strcat_printf(buf, sizeof(buf), "tcc: ");
 502     }
 503     if (is_warning)
 504         strcat_printf(buf, sizeof(buf), "warning: ");
 505     else
 506         strcat_printf(buf, sizeof(buf), "error: ");
 507     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 508
 509     if (!s1->error_func) {
 510         /* default case: stderr */
 511         if (s1->ppfp) /* print a newline during tcc -E */
 512             fprintf(s1->ppfp, "\n"), fflush(s1->ppfp);
 513         fflush(stdout); /* flush -v output */
 514         fprintf(stderr, "%s\n", buf);
 515         fflush(stderr); /* print error/warning now (win32) */
 516     } else {
 517         s1->error_func(s1->error_opaque, buf);
 518     }
 519     if (!is_warning || s1->warn_error)
 520         s1->nb_errors++;
 521 }
 522
 523 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 524                         void (*error_func)(void *opaque, const char *msg))
 525 {
 526     s->error_opaque = error_opaque;
 527     s->error_func = error_func;
 528 }
 529
 530 /* error without aborting current compilation */
 531 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 532 {
 533     TCCState *s1 = tcc_state;
 534     va_list ap;
 535
 536     va_start(ap, fmt);
 537     error1(s1, 0, fmt, ap);
 538     va_end(ap);
 539 }
 540
 541 PUB_FUNC void tcc_error(const char *fmt, ...)
 542 {
 543     TCCState *s1 = tcc_state;
 544     va_list ap;
 545
 546     va_start(ap, fmt);
 547     error1(s1, 0, fmt, ap);
 548     va_end(ap);
 549     /* better than nothing: in some cases, we accept to handle errors */
 550     if (s1->error_set_jmp_enabled) {
 551         longjmp(s1->error_jmp_buf, 1);
 552     } else {
 553         /* XXX: eliminate this someday */
 554         exit(1);
 555     }
 556 }
 557
 558 PUB_FUNC void tcc_warning(const char *fmt, ...)
 559 {
 560     TCCState *s1 = tcc_state;
 561     va_list ap;
 562
 563     if (s1->warn_none)
 564         return;
 565
 566     va_start(ap, fmt);
 567     error1(s1, 1, fmt, ap);
 568     va_end(ap);
 569 }
 570
 571 /********************************************************/
 572 /* I/O layer */
 573
 574 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 575 {
 576     BufferedFile *bf;
 577     int buflen = initlen ? initlen : IO_BUF_SIZE;
 578
 579     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 580     bf->buf_ptr = bf->buffer;
 581     bf->buf_end = bf->buffer + initlen;
 582     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 583     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 584 #ifdef _WIN32
 585     normalize_slashes(bf->filename);
 586 #endif
 587     bf->line_num = 1;
 588     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 589     bf->fd = -1;
 590     bf->prev = file;
 591     file = bf;
 592 }
 593
 594 ST_FUNC void tcc_close(void)
 595 {
 596     BufferedFile *bf = file;
 597     if (bf->fd > 0) {
 598         close(bf->fd);
 599         total_lines += bf->line_num;
 600     }
 601     file = bf->prev;
 602     tcc_free(bf);
 603 }
 604
 605 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 606 {
 607     int fd;
 608     if (strcmp(filename, "-") == 0)
 609         fd = 0, filename = "<stdin>";
 610     else
 611         fd = open(filename, O_RDONLY | O_BINARY);
 612     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 613         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 614                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 615     if (fd < 0)
 616         return -1;
 617
 618     tcc_open_bf(s1, filename, 0);
 619     file->fd = fd;
 620     return fd;
 621 }
 622
 623 /* compile the C file opened in 'file'. Return non zero if errors. */
 624 static int tcc_compile(TCCState *s1)
 625 {
 626     Sym *define_start;
 627
 628     define_start = define_stack;
 629     if (setjmp(s1->error_jmp_buf) == 0) {
 630         s1->nb_errors = 0;
 631         s1->error_set_jmp_enabled = 1;
 632
 633         preprocess_start(s1);
 634         tccgen_start(s1);
 635
 636 #ifdef INC_DEBUG
 637         printf("%s: **** new file\n", file->filename);
 638 #endif
 639
 640         ch = file->buf_ptr[0];
 641         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 642         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
 643         next();
 644         decl(VT_CONST);
 645         if (tok != TOK_EOF)
 646             expect("declaration");
 647         /* free defines here already on behalf of of M.M.'s possibly existing
 648            experimental preprocessor implementation. The normal call below
 649            is still there to free after error-longjmp */
 650         free_defines(define_start);
 651         tccgen_end(s1);
 652     }
 653     s1->error_set_jmp_enabled = 0;
 654
 655     free_inline_functions(s1);
 656     /* reset define stack, but keep -D and built-ins */
 657     free_defines(define_start);
 658     sym_pop(&global_stack, NULL, 0);
 659     sym_pop(&local_stack, NULL, 0);
 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     ch = file->buf_ptr[0];
 693     next_nomacro();
 694     parse_define();
 695
 696     tcc_close();
 697 }
 698
 699 /* undefine a preprocessor symbol */
 700 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 701 {
 702     TokenSym *ts;
 703     Sym *s;
 704     ts = tok_alloc(sym, strlen(sym));
 705     s = define_find(ts->tok);
 706     /* undefine symbol by putting an invalid name */
 707     if (s)
 708         define_undef(s);
 709 }
 710
 711 /* cleanup all static data used during compilation */
 712 static void tcc_cleanup(void)
 713 {
 714     if (NULL == tcc_state)
 715         return;
 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
 740 #ifdef CHAR_IS_UNSIGNED
 741     s->char_is_unsigned = 1;
 742 #endif
 743 #ifdef TCC_TARGET_I386
 744     s->seg_size = 32;
 745 #endif
 746     /* enable this if you want symbols with leading underscore on windows: */
 747 #if 0 /* def TCC_TARGET_PE */
 748     s->leading_underscore = 1;
 749 #endif
 750 #ifdef _WIN32
 751     tcc_set_lib_path_w32(s);
 752 #else
 753     tcc_set_lib_path(s, CONFIG_TCCDIR);
 754 #endif
 755     tccelf_new(s);
 756     tccpp_new(s);
 757
 758     /* we add dummy defines for some special macros to speed up tests
 759        and to have working defined() */
 760     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 761     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 762     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 763     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 764     {
 765         /* define __TINYC__ 92X  */
 766         char buffer[32]; int a,b,c;
 767         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 768         sprintf(buffer, "%d", a*10000 + b*100 + c);
 769         tcc_define_symbol(s, "__TINYC__", buffer);
 770     }
 771
 772     /* standard defines */
 773     tcc_define_symbol(s, "__STDC__", NULL);
 774     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 775     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 776
 777     /* target defines */
 778 #if defined(TCC_TARGET_I386)
 779     tcc_define_symbol(s, "__i386__", NULL);
 780     tcc_define_symbol(s, "__i386", NULL);
 781     tcc_define_symbol(s, "i386", NULL);
 782 #elif defined(TCC_TARGET_X86_64)
 783     tcc_define_symbol(s, "__x86_64__", NULL);
 784 #elif defined(TCC_TARGET_ARM)
 785     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 786     tcc_define_symbol(s, "__arm_elf__", NULL);
 787     tcc_define_symbol(s, "__arm_elf", NULL);
 788     tcc_define_symbol(s, "arm_elf", NULL);
 789     tcc_define_symbol(s, "__arm__", NULL);
 790     tcc_define_symbol(s, "__arm", NULL);
 791     tcc_define_symbol(s, "arm", NULL);
 792     tcc_define_symbol(s, "__APCS_32__", NULL);
 793     tcc_define_symbol(s, "__ARMEL__", NULL);
 794 #if defined(TCC_ARM_EABI)
 795     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 796 #endif
 797 #if defined(TCC_ARM_HARDFLOAT)
 798     s->float_abi = ARM_HARD_FLOAT;
 799     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 800 #else
 801     s->float_abi = ARM_SOFTFP_FLOAT;
 802 #endif
 803 #elif defined(TCC_TARGET_ARM64)
 804     tcc_define_symbol(s, "__aarch64__", NULL);
 805 #endif
 806
 807 #ifdef TCC_TARGET_PE
 808     tcc_define_symbol(s, "_WIN32", NULL);
 809 # ifdef TCC_TARGET_X86_64
 810     tcc_define_symbol(s, "_WIN64", NULL);
 811 # endif
 812 #else
 813     tcc_define_symbol(s, "__unix__", NULL);
 814     tcc_define_symbol(s, "__unix", NULL);
 815     tcc_define_symbol(s, "unix", NULL);
 816 # if defined(__linux__)
 817     tcc_define_symbol(s, "__linux__", NULL);
 818     tcc_define_symbol(s, "__linux", NULL);
 819 # endif
 820 # if defined(__FreeBSD__)
 821     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 822     /* No 'Thread Storage Local' on FreeBSD with tcc */
 823     tcc_define_symbol(s, "__NO_TLS", NULL);
 824 # endif
 825 # if defined(__FreeBSD_kernel__)
 826     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 827 # endif
 828 #endif
 829 # if defined(__NetBSD__)
 830     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 831 # endif
 832 # if defined(__OpenBSD__)
 833     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 834 # endif
 835
 836     /* TinyCC & gcc defines */
 837 #if defined(TCC_TARGET_PE) && defined(TCC_TARGET_X86_64)
 838     /* 64bit Windows. */
 839     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 840     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 841     tcc_define_symbol(s, "__LLP64__", NULL);
 842 #elif defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_ARM64)
 843     /* Other 64bit systems. */
 844     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 845     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 846     tcc_define_symbol(s, "__LP64__", NULL);
 847 #else
 848     /* Other 32bit systems. */
 849     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 850     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 851     tcc_define_symbol(s, "__ILP32__", NULL);
 852 #endif
 853
 854 #ifdef TCC_TARGET_PE
 855     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 856     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 857 #else
 858     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 859     /* wint_t is unsigned int by default, but (signed) int on BSDs
 860        and unsigned short on windows.  Other OSes might have still
 861        other conventions, sigh.  */
 862 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 863   || defined(__NetBSD__) || defined(__OpenBSD__)
 864     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 865 #  ifdef __FreeBSD__
 866     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 867        that are unconditionally used in FreeBSDs other system headers :/ */
 868     tcc_define_symbol(s, "__GNUC__", "2");
 869     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 870     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 871 #  endif
 872 # else
 873     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 874     /* glibc defines */
 875     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 876         "name proto __asm__ (#alias)");
 877     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 878         "name proto __asm__ (#alias) __THROW");
 879 # endif
 880     /* Some GCC builtins that are simple to express as macros.  */
 881     tcc_define_symbol(s, "__builtin_extract_return_addr(x)", "x");
 882 #endif /* ndef TCC_TARGET_PE */
 883     return s;
 884 }
 885
 886 LIBTCCAPI void tcc_delete(TCCState *s1)
 887 {
 888     tcc_cleanup();
 889
 890     /* free sections */
 891     tccelf_delete(s1);
 892
 893     /* free library paths */
 894     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 895     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 896
 897     /* free include paths */
 898     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
 899     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 900     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 901     dynarray_reset(&s1->cmd_include_files, &s1->nb_cmd_include_files);
 902
 903     tcc_free(s1->tcc_lib_path);
 904     tcc_free(s1->soname);
 905     tcc_free(s1->rpath);
 906     tcc_free(s1->init_symbol);
 907     tcc_free(s1->fini_symbol);
 908     tcc_free(s1->outfile);
 909     tcc_free(s1->deps_outfile);
 910     dynarray_reset(&s1->files, &s1->nb_files);
 911     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 912     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 913     dynarray_reset(&s1->argv, &s1->argc);
 914
 915 #ifdef TCC_IS_NATIVE
 916     /* free runtime memory */
 917     tcc_run_free(s1);
 918 #endif
 919
 920     tcc_free(s1);
 921     if (0 == --nb_states)
 922         tcc_memcheck();
 923 }
 924
 925 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 926 {
 927     s->output_type = output_type;
 928
 929     /* always elf for objects */
 930     if (output_type == TCC_OUTPUT_OBJ)
 931         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 932
 933     if (s->char_is_unsigned)
 934         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 935
 936     if (!s->nostdinc) {
 937         /* default include paths */
 938         /* -isystem paths have already been handled */
 939         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 940     }
 941
 942 #ifdef CONFIG_TCC_BCHECK
 943     if (s->do_bounds_check) {
 944         /* if bound checking, then add corresponding sections */
 945         tccelf_bounds_new(s);
 946         /* define symbol */
 947         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 948     }
 949 #endif
 950     if (s->do_debug) {
 951         /* add debug sections */
 952         tccelf_stab_new(s);
 953     }
 954
 955     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 956
 957 #ifdef TCC_TARGET_PE
 958 # ifdef _WIN32
 959     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
 960         tcc_add_systemdir(s);
 961 # endif
 962 #else
 963     /* paths for crt objects */
 964     tcc_split_path(s, &s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 965     /* add libc crt1/crti objects */
 966     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
 967         !s->nostdlib) {
 968         if (output_type != TCC_OUTPUT_DLL)
 969             tcc_add_crt(s, "crt1.o");
 970         tcc_add_crt(s, "crti.o");
 971     }
 972 #endif
 973     return 0;
 974 }
 975
 976 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 977 {
 978     tcc_split_path(s, &s->include_paths, &s->nb_include_paths, pathname);
 979     return 0;
 980 }
 981
 982 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
 983 {
 984     tcc_split_path(s, &s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
 985     return 0;
 986 }
 987
 988 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
 989 {
 990     int ret, filetype;
 991
 992     filetype = flags & 0x0F;
 993     if (filetype == 0) {
 994         /* use a file extension to detect a filetype */
 995         const char *ext = tcc_fileextension(filename);
 996         if (ext[0]) {
 997             ext++;
 998             if (!strcmp(ext, "S"))
 999                 filetype = AFF_TYPE_ASMPP;
1000             else if (!strcmp(ext, "s"))
1001                 filetype = AFF_TYPE_ASM;
1002             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1003                 filetype = AFF_TYPE_C;
1004             else
1005                 filetype = AFF_TYPE_BIN;
1006         } else {
1007             filetype = AFF_TYPE_C;
1008         }
1009     }
1010
1011     /* open the file */
1012     ret = tcc_open(s1, filename);
1013     if (ret < 0) {
1014         if (flags & AFF_PRINT_ERROR)
1015             tcc_error_noabort("file '%s' not found", filename);
1016         return ret;
1017     }
1018
1019     /* update target deps */
1020     dynarray_add(&s1->target_deps, &s1->nb_target_deps,
1021             tcc_strdup(filename));
1022
1023     parse_flags = 0;
1024     /* if .S file, define __ASSEMBLER__ like gcc does */
1025     if (filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP) {
1026         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1027         parse_flags = PARSE_FLAG_ASM_FILE;
1028     }
1029
1030     if (flags & AFF_PREPROCESS) {
1031         ret = tcc_preprocess(s1);
1032     } else if (filetype == AFF_TYPE_C) {
1033         ret = tcc_compile(s1);
1034 #ifdef CONFIG_TCC_ASM
1035     } else if (filetype == AFF_TYPE_ASMPP) {
1036         /* non preprocessed assembler */
1037         ret = tcc_assemble(s1, 1);
1038     } else if (filetype == AFF_TYPE_ASM) {
1039         /* preprocessed assembler */
1040         ret = tcc_assemble(s1, 0);
1041 #endif
1042     } else {
1043         ElfW(Ehdr) ehdr;
1044         int fd, obj_type;
1045
1046         fd = file->fd;
1047         obj_type = tcc_object_type(fd, &ehdr);
1048         lseek(fd, 0, SEEK_SET);
1049
1050         /* do not display line number if error */
1051         file->line_num = 0;
1052
1053         switch (obj_type) {
1054         case AFF_BINTYPE_REL:
1055             ret = tcc_load_object_file(s1, fd, 0);
1056             break;
1057 #ifndef TCC_TARGET_PE
1058         case AFF_BINTYPE_DYN:
1059             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1060                 ret = 0;
1061 #ifdef TCC_IS_NATIVE
1062                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1063                     ret = -1;
1064 #endif
1065             } else {
1066                 ret = tcc_load_dll(s1, fd, filename,
1067                                    (flags & AFF_REFERENCED_DLL) != 0);
1068             }
1069             break;
1070 #endif
1071         case AFF_BINTYPE_AR:
1072             ret = tcc_load_archive(s1, fd);
1073             break;
1074 #ifdef TCC_TARGET_COFF
1075         case AFF_BINTYPE_C67:
1076             ret = tcc_load_coff(s1, fd);
1077             break;
1078 #endif
1079         default:
1080 #ifdef TCC_TARGET_PE
1081             ret = pe_load_file(s1, filename, fd);
1082 #else
1083             /* as GNU ld, consider it is an ld script if not recognized */
1084             ret = tcc_load_ldscript(s1);
1085 #endif
1086             if (ret < 0)
1087                 tcc_error_noabort("unrecognized file type");
1088             break;
1089         }
1090     }
1091     tcc_close();
1092     return ret;
1093 }
1094
1095 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1096 {
1097     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1098         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS | s->filetype);
1099     else
1100         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | s->filetype);
1101 }
1102
1103 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1104 {
1105     tcc_split_path(s, &s->library_paths, &s->nb_library_paths, pathname);
1106     return 0;
1107 }
1108
1109 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1110     const char *filename, int flags, char **paths, int nb_paths)
1111 {
1112     char buf[1024];
1113     int i;
1114
1115     for(i = 0; i < nb_paths; i++) {
1116         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1117         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1118             return 0;
1119     }
1120     return -1;
1121 }
1122
1123 /* find and load a dll. Return non zero if not found */
1124 /* XXX: add '-rpath' option support ? */
1125 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1126 {
1127     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1128         s->library_paths, s->nb_library_paths);
1129 }
1130
1131 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1132 {
1133     if (-1 == tcc_add_library_internal(s, "%s/%s",
1134         filename, 0, s->crt_paths, s->nb_crt_paths))
1135         tcc_error_noabort("file '%s' not found", filename);
1136     return 0;
1137 }
1138
1139 /* the library name is the same as the argument of the '-l' option */
1140 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1141 {
1142 #ifdef TCC_TARGET_PE
1143     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1144     const char **pp = s->static_link ? libs + 4 : libs;
1145 #else
1146     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1147     const char **pp = s->static_link ? libs + 1 : libs;
1148 #endif
1149     while (*pp) {
1150         if (0 == tcc_add_library_internal(s, *pp,
1151             libraryname, 0, s->library_paths, s->nb_library_paths))
1152             return 0;
1153         ++pp;
1154     }
1155     return -1;
1156 }
1157
1158 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1159 {
1160     int ret = tcc_add_library(s, libname);
1161     if (ret < 0)
1162         tcc_error_noabort("library '%s' not found", libname);
1163     return ret;
1164 }
1165
1166 /* habdle #pragma comment(lib,) */
1167 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1168 {
1169     int i;
1170     for (i = 0; i < s1->nb_pragma_libs; i++)
1171         tcc_add_library_err(s1, s1->pragma_libs[i]);
1172 }
1173
1174 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1175 {
1176 #ifdef TCC_TARGET_PE
1177     /* On x86_64 'val' might not be reachable with a 32bit offset.
1178        So it is handled here as if it were in a DLL. */
1179     pe_putimport(s, 0, name, (uintptr_t)val);
1180 #else
1181     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1182         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1183         SHN_ABS, name);
1184 #endif
1185     return 0;
1186 }
1187
1188 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1189 {
1190     tcc_free(s->tcc_lib_path);
1191     s->tcc_lib_path = tcc_strdup(path);
1192 }
1193
1194 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1195 #define FD_INVERT 0x0002 /* invert value before storing */
1196
1197 typedef struct FlagDef {
1198     uint16_t offset;
1199     uint16_t flags;
1200     const char *name;
1201 } FlagDef;
1202
1203 static int no_flag(const char **pp)
1204 {
1205     const char *p = *pp;
1206     if (*p != 'n' || *++p != 'o' || *++p != '-')
1207         return 0;
1208     *pp = p + 1;
1209     return 1;
1210 }
1211
1212 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, const char *name)
1213 {
1214     int value, ret;
1215     const FlagDef *p;
1216     const char *r;
1217
1218     value = 1;
1219     r = name;
1220     if (no_flag(&r))
1221         value = 0;
1222
1223     for (ret = -1, p = flags; p->name; ++p) {
1224         if (ret) {
1225             if (strcmp(r, p->name))
1226                 continue;
1227         } else {
1228             if (0 == (p->flags & WD_ALL))
1229                 continue;
1230         }
1231         if (p->offset) {
1232             *(int*)((char *)s + p->offset) =
1233                 p->flags & FD_INVERT ? !value : value;
1234             if (ret)
1235                 return 0;
1236         } else {
1237             ret = 0;
1238         }
1239     }
1240     return ret;
1241 }
1242
1243 static int strstart(const char *val, const char **str)
1244 {
1245     const char *p, *q;
1246     p = *str;
1247     q = val;
1248     while (*q) {
1249         if (*p != *q)
1250             return 0;
1251         p++;
1252         q++;
1253     }
1254     *str = p;
1255     return 1;
1256 }
1257
1258 /* Like strstart, but automatically takes into account that ld options can
1259  *
1260  * - start with double or single dash (e.g. '--soname' or '-soname')
1261  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1262  *   or '-Wl,-soname=x.so')
1263  *
1264  * you provide `val` always in 'option[=]' form (no leading -)
1265  */
1266 static int link_option(const char *str, const char *val, const char **ptr)
1267 {
1268     const char *p, *q;
1269     int ret;
1270
1271     /* there should be 1 or 2 dashes */
1272     if (*str++ != '-')
1273         return 0;
1274     if (*str == '-')
1275         str++;
1276
1277     /* then str & val should match (potentialy up to '=') */
1278     p = str;
1279     q = val;
1280
1281     ret = 1;
1282     if (q[0] == '?') {
1283         ++q;
1284         if (no_flag(&p))
1285             ret = -1;
1286     }
1287
1288     while (*q != '\0' && *q != '=') {
1289         if (*p != *q)
1290             return 0;
1291         p++;
1292         q++;
1293     }
1294
1295     /* '=' near eos means ',' or '=' is ok */
1296     if (*q == '=') {
1297         if (*p == 0)
1298             *ptr = p;
1299         if (*p != ',' && *p != '=')
1300             return 0;
1301         p++;
1302     } else if (*p) {
1303         return 0;
1304     }
1305     *ptr = p;
1306     return ret;
1307 }
1308
1309 static const char *skip_linker_arg(const char **str)
1310 {
1311     const char *s1 = *str;
1312     const char *s2 = strchr(s1, ',');
1313     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1314     return s2;
1315 }
1316
1317 static void copy_linker_arg(char **pp, const char *s, int sep)
1318 {
1319     const char *q = s;
1320     char *p = *pp;
1321     int l = 0;
1322     if (p && sep)
1323         p[l = strlen(p)] = sep, ++l;
1324     skip_linker_arg(&q);
1325     pstrncpy(l + (*pp = tcc_realloc(p, q - s + l + 1)), s, q - s);
1326 }
1327
1328 /* set linker options */
1329 static int tcc_set_linker(TCCState *s, const char *option)
1330 {
1331     while (*option) {
1332
1333         const char *p = NULL;
1334         char *end = NULL;
1335         int ignoring = 0;
1336         int ret;
1337
1338         if (link_option(option, "Bsymbolic", &p)) {
1339             s->symbolic = 1;
1340         } else if (link_option(option, "nostdlib", &p)) {
1341             s->nostdlib = 1;
1342         } else if (link_option(option, "fini=", &p)) {
1343             copy_linker_arg(&s->fini_symbol, p, 0);
1344             ignoring = 1;
1345         } else if (link_option(option, "image-base=", &p)
1346                 || link_option(option, "Ttext=", &p)) {
1347             s->text_addr = strtoull(p, &end, 16);
1348             s->has_text_addr = 1;
1349         } else if (link_option(option, "init=", &p)) {
1350             copy_linker_arg(&s->init_symbol, p, 0);
1351             ignoring = 1;
1352         } else if (link_option(option, "oformat=", &p)) {
1353 #if defined(TCC_TARGET_PE)
1354             if (strstart("pe-", &p)) {
1355 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1356             if (strstart("elf64-", &p)) {
1357 #else
1358             if (strstart("elf32-", &p)) {
1359 #endif
1360                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1361             } else if (!strcmp(p, "binary")) {
1362                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1363 #ifdef TCC_TARGET_COFF
1364             } else if (!strcmp(p, "coff")) {
1365                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1366 #endif
1367             } else
1368                 goto err;
1369
1370         } else if (link_option(option, "as-needed", &p)) {
1371             ignoring = 1;
1372         } else if (link_option(option, "O", &p)) {
1373             ignoring = 1;
1374         } else if (link_option(option, "export-all-symbols", &p)) {
1375             s->rdynamic = 1;
1376         } else if (link_option(option, "rpath=", &p)) {
1377             copy_linker_arg(&s->rpath, p, ':');
1378         } else if (link_option(option, "enable-new-dtags", &p)) {
1379             s->enable_new_dtags = 1;
1380         } else if (link_option(option, "section-alignment=", &p)) {
1381             s->section_align = strtoul(p, &end, 16);
1382         } else if (link_option(option, "soname=", &p)) {
1383             copy_linker_arg(&s->soname, p, 0);
1384 #ifdef TCC_TARGET_PE
1385         } else if (link_option(option, "large-address-aware", &p)) {
1386             s->pe_characteristics |= 0x20;
1387         } else if (link_option(option, "file-alignment=", &p)) {
1388             s->pe_file_align = strtoul(p, &end, 16);
1389         } else if (link_option(option, "stack=", &p)) {
1390             s->pe_stack_size = strtoul(p, &end, 10);
1391         } else if (link_option(option, "subsystem=", &p)) {
1392 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1393             if (!strcmp(p, "native")) {
1394                 s->pe_subsystem = 1;
1395             } else if (!strcmp(p, "console")) {
1396                 s->pe_subsystem = 3;
1397             } else if (!strcmp(p, "gui") || !strcmp(p, "windows")) {
1398                 s->pe_subsystem = 2;
1399             } else if (!strcmp(p, "posix")) {
1400                 s->pe_subsystem = 7;
1401             } else if (!strcmp(p, "efiapp")) {
1402                 s->pe_subsystem = 10;
1403             } else if (!strcmp(p, "efiboot")) {
1404                 s->pe_subsystem = 11;
1405             } else if (!strcmp(p, "efiruntime")) {
1406                 s->pe_subsystem = 12;
1407             } else if (!strcmp(p, "efirom")) {
1408                 s->pe_subsystem = 13;
1409 #elif defined(TCC_TARGET_ARM)
1410             if (!strcmp(p, "wince")) {
1411                 s->pe_subsystem = 9;
1412 #endif
1413             } else
1414                 goto err;
1415 #endif
1416         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1417             s->alacarte_link = ret < 0;
1418         } else if (p) {
1419             return 0;
1420         } else {
1421     err:
1422             tcc_error("unsupported linker option '%s'", option);
1423         }
1424
1425         if (ignoring && s->warn_unsupported)
1426             tcc_warning("unsupported linker option '%s'", option);
1427
1428         option = skip_linker_arg(&p);
1429     }
1430     return 1;
1431 }
1432
1433 typedef struct TCCOption {
1434     const char *name;
1435     uint16_t index;
1436     uint16_t flags;
1437 } TCCOption;
1438
1439 enum {
1440     TCC_OPTION_HELP,
1441     TCC_OPTION_HELP2,
1442     TCC_OPTION_v,
1443     TCC_OPTION_I,
1444     TCC_OPTION_D,
1445     TCC_OPTION_U,
1446     TCC_OPTION_P,
1447     TCC_OPTION_L,
1448     TCC_OPTION_B,
1449     TCC_OPTION_l,
1450     TCC_OPTION_bench,
1451     TCC_OPTION_bt,
1452     TCC_OPTION_b,
1453     TCC_OPTION_g,
1454     TCC_OPTION_c,
1455     TCC_OPTION_dumpversion,
1456     TCC_OPTION_d,
1457     TCC_OPTION_static,
1458     TCC_OPTION_std,
1459     TCC_OPTION_shared,
1460     TCC_OPTION_soname,
1461     TCC_OPTION_o,
1462     TCC_OPTION_r,
1463     TCC_OPTION_s,
1464     TCC_OPTION_traditional,
1465     TCC_OPTION_Wl,
1466     TCC_OPTION_Wp,
1467     TCC_OPTION_W,
1468     TCC_OPTION_O,
1469     TCC_OPTION_mfloat_abi,
1470     TCC_OPTION_m,
1471     TCC_OPTION_f,
1472     TCC_OPTION_isystem,
1473     TCC_OPTION_iwithprefix,
1474     TCC_OPTION_include,
1475     TCC_OPTION_nostdinc,
1476     TCC_OPTION_nostdlib,
1477     TCC_OPTION_print_search_dirs,
1478     TCC_OPTION_rdynamic,
1479     TCC_OPTION_param,
1480     TCC_OPTION_pedantic,
1481     TCC_OPTION_pthread,
1482     TCC_OPTION_run,
1483     TCC_OPTION_w,
1484     TCC_OPTION_pipe,
1485     TCC_OPTION_E,
1486     TCC_OPTION_MD,
1487     TCC_OPTION_MF,
1488     TCC_OPTION_x,
1489     TCC_OPTION_ar,
1490     TCC_OPTION_impdef
1491 };
1492
1493 #define TCC_OPTION_HAS_ARG 0x0001
1494 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1495
1496 static const TCCOption tcc_options[] = {
1497     { "h", TCC_OPTION_HELP, 0 },
1498     { "-help", TCC_OPTION_HELP, 0 },
1499     { "?", TCC_OPTION_HELP, 0 },
1500     { "hh", TCC_OPTION_HELP2, 0 },
1501     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1502     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1503     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1504     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1505     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1506     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1507     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1508     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1509     { "bench", TCC_OPTION_bench, 0 },
1510 #ifdef CONFIG_TCC_BACKTRACE
1511     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1512 #endif
1513 #ifdef CONFIG_TCC_BCHECK
1514     { "b", TCC_OPTION_b, 0 },
1515 #endif
1516     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1517     { "c", TCC_OPTION_c, 0 },
1518     { "dumpversion", TCC_OPTION_dumpversion, 0},
1519     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1520     { "static", TCC_OPTION_static, 0 },
1521     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1522     { "shared", TCC_OPTION_shared, 0 },
1523     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1524     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1525     { "-param", TCC_OPTION_param, TCC_OPTION_HAS_ARG },
1526     { "pedantic", TCC_OPTION_pedantic, 0},
1527     { "pthread", TCC_OPTION_pthread, 0},
1528     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1529     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1530     { "r", TCC_OPTION_r, 0 },
1531     { "s", TCC_OPTION_s, 0 },
1532     { "traditional", TCC_OPTION_traditional, 0 },
1533     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1534     { "Wp,", TCC_OPTION_Wp, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1535     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1536     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1537 #ifdef TCC_TARGET_ARM
1538     { "mfloat-abi", TCC_OPTION_mfloat_abi, TCC_OPTION_HAS_ARG },
1539 #endif
1540     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1541     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1542     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1543     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
1544     { "include", TCC_OPTION_include, TCC_OPTION_HAS_ARG },
1545     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1546     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1547     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1548     { "w", TCC_OPTION_w, 0 },
1549     { "pipe", TCC_OPTION_pipe, 0},
1550     { "E", TCC_OPTION_E, 0},
1551     { "MD", TCC_OPTION_MD, 0},
1552     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1553     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1554     { "ar", TCC_OPTION_ar, 0},
1555 #ifdef TCC_TARGET_PE
1556     { "impdef", TCC_OPTION_impdef, 0},
1557 #endif
1558     { NULL, 0, 0 },
1559 };
1560
1561 static const FlagDef options_W[] = {
1562     { 0, 0, "all" },
1563     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1564     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1565     { offsetof(TCCState, warn_error), 0, "error" },
1566     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1567       "implicit-function-declaration" },
1568     { 0, 0, NULL }
1569 };
1570
1571 static const FlagDef options_f[] = {
1572     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1573     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1574     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1575     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1576     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1577     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1578     { 0, 0, NULL }
1579 };
1580
1581 static const FlagDef options_m[] = {
1582     { offsetof(TCCState, ms_bitfields), 0, "ms-bitfields" },
1583 #ifdef TCC_TARGET_X86_64
1584     { offsetof(TCCState, nosse), FD_INVERT, "sse" },
1585 #endif
1586     { 0, 0, NULL }
1587 };
1588
1589 static void parse_option_D(TCCState *s1, const char *optarg)
1590 {
1591     char *sym = tcc_strdup(optarg);
1592     char *value = strchr(sym, '=');
1593     if (value)
1594         *value++ = '\0';
1595     tcc_define_symbol(s1, sym, value);
1596     tcc_free(sym);
1597 }
1598
1599 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1600 {
1601     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1602     f->type = filetype;
1603     f->alacarte = s->alacarte_link;
1604     strcpy(f->name, filename);
1605     dynarray_add(&s->files, &s->nb_files, f);
1606 }
1607
1608 static int args_parser_make_argv(const char *r, int *argc, char ***argv)
1609 {
1610     int ret = 0, q, c;
1611     CString str;
1612     for(;;) {
1613         while (c = (unsigned char)*r, c && c <= ' ')
1614             ++r;
1615         if (c == 0)
1616             break;
1617         q = 0;
1618         cstr_new(&str);
1619         while (c = (unsigned char)*r, c) {
1620             ++r;
1621             if (c == '\\' && (*r == '"' || *r == '\\')) {
1622                 c = *r++;
1623             } else if (c == '"') {
1624                 q = !q;
1625                 continue;
1626             } else if (q == 0 && c <= ' ') {
1627                 break;
1628             }
1629             cstr_ccat(&str, c);
1630         }
1631         cstr_ccat(&str, 0);
1632         //printf("<%s>\n", str.data), fflush(stdout);
1633         dynarray_add(argv, argc, tcc_strdup(str.data));
1634         cstr_free(&str);
1635         ++ret;
1636     }
1637     return ret;
1638 }
1639
1640 /* read list file */
1641 static void args_parser_listfile(TCCState *s,
1642     const char *filename, int optind, int *pargc, char ***pargv)
1643 {
1644     int fd, i;
1645     size_t len;
1646     char *p;
1647     int argc = 0;
1648     char **argv = NULL;
1649
1650     fd = open(filename, O_RDONLY | O_BINARY);
1651     if (fd < 0)
1652         tcc_error("listfile '%s' not found", filename);
1653
1654     len = lseek(fd, 0, SEEK_END);
1655     p = tcc_malloc(len + 1), p[len] = 0;
1656     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1657
1658     for (i = 0; i < *pargc; ++i)
1659         if (i == optind)
1660             args_parser_make_argv(p, &argc, &argv);
1661         else
1662             dynarray_add(&argv, &argc, tcc_strdup((*pargv)[i]));
1663
1664     tcc_free(p);
1665     dynarray_reset(&s->argv, &s->argc);
1666     *pargc = s->argc = argc, *pargv = s->argv = argv;
1667 }
1668
1669 PUB_FUNC int tcc_parse_args(TCCState *s, int *pargc, char ***pargv, int optind)
1670 {
1671     const TCCOption *popt;
1672     const char *optarg, *r;
1673     const char *run = NULL;
1674     int last_o = -1;
1675     int x;
1676     CString linker_arg; /* collect -Wl options */
1677     char buf[1024];
1678     int tool = 0, arg_start = 0, noaction = optind;
1679     char **argv = *pargv;
1680     int argc = *pargc;
1681
1682     cstr_new(&linker_arg);
1683
1684     while (optind < argc) {
1685         r = argv[optind];
1686         if (r[0] == '@' && r[1] != '\0') {
1687             args_parser_listfile(s, r + 1, optind, &argc, &argv);
1688             continue;
1689         }
1690         optind++;
1691         if (tool) {
1692             if (r[0] == '-' && r[1] == 'v' && r[2] == 0)
1693                 ++s->verbose;
1694             continue;
1695         }
1696 reparse:
1697         if (r[0] != '-' || r[1] == '\0') {
1698             if (r[0] != '@') /* allow "tcc file(s) -run @ args ..." */
1699                 args_parser_add_file(s, r, s->filetype);
1700             if (run) {
1701                 tcc_set_options(s, run);
1702                 arg_start = optind - 1;
1703                 break;
1704             }
1705             continue;
1706         }
1707
1708         /* find option in table */
1709         for(popt = tcc_options; ; ++popt) {
1710             const char *p1 = popt->name;
1711             const char *r1 = r + 1;
1712             if (p1 == NULL)
1713                 tcc_error("invalid option -- '%s'", r);
1714             if (!strstart(p1, &r1))
1715                 continue;
1716             optarg = r1;
1717             if (popt->flags & TCC_OPTION_HAS_ARG) {
1718                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1719                     if (optind >= argc)
1720                 arg_err:
1721                         tcc_error("argument to '%s' is missing", r);
1722                     optarg = argv[optind++];
1723                 }
1724             } else if (*r1 != '\0')
1725                 continue;
1726             break;
1727         }
1728
1729         switch(popt->index) {
1730         case TCC_OPTION_HELP:
1731             return OPT_HELP;
1732         case TCC_OPTION_HELP2:
1733             return OPT_HELP2;
1734         case TCC_OPTION_I:
1735             tcc_add_include_path(s, optarg);
1736             break;
1737         case TCC_OPTION_D:
1738             parse_option_D(s, optarg);
1739             break;
1740         case TCC_OPTION_U:
1741             tcc_undefine_symbol(s, optarg);
1742             break;
1743         case TCC_OPTION_L:
1744             tcc_add_library_path(s, optarg);
1745             break;
1746         case TCC_OPTION_B:
1747             /* set tcc utilities path (mainly for tcc development) */
1748             tcc_set_lib_path(s, optarg);
1749             break;
1750         case TCC_OPTION_l:
1751             args_parser_add_file(s, optarg, AFF_TYPE_LIB);
1752             s->nb_libraries++;
1753             break;
1754         case TCC_OPTION_pthread:
1755             parse_option_D(s, "_REENTRANT");
1756             s->option_pthread = 1;
1757             break;
1758         case TCC_OPTION_bench:
1759             s->do_bench = 1;
1760             break;
1761 #ifdef CONFIG_TCC_BACKTRACE
1762         case TCC_OPTION_bt:
1763             tcc_set_num_callers(atoi(optarg));
1764             break;
1765 #endif
1766 #ifdef CONFIG_TCC_BCHECK
1767         case TCC_OPTION_b:
1768             s->do_bounds_check = 1;
1769             s->do_debug = 1;
1770             break;
1771 #endif
1772         case TCC_OPTION_g:
1773             s->do_debug = 1;
1774             break;
1775         case TCC_OPTION_c:
1776             x = TCC_OUTPUT_OBJ;
1777         set_output_type:
1778             if (s->output_type)
1779                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1780             s->output_type = x;
1781             break;
1782         case TCC_OPTION_d:
1783             if (*optarg == 'D')
1784                 s->dflag = 3;
1785             else if (*optarg == 'M')
1786                 s->dflag = 7;
1787             else
1788                 goto unsupported_option;
1789             break;
1790         case TCC_OPTION_static:
1791             s->static_link = 1;
1792             break;
1793         case TCC_OPTION_std:
1794             /* silently ignore, a current purpose:
1795                allow to use a tcc as a reference compiler for "make test" */
1796             break;
1797         case TCC_OPTION_shared:
1798             x = TCC_OUTPUT_DLL;
1799             goto set_output_type;
1800         case TCC_OPTION_soname:
1801             s->soname = tcc_strdup(optarg);
1802             break;
1803         case TCC_OPTION_o:
1804             if (s->outfile) {
1805                 tcc_warning("multiple -o option");
1806                 tcc_free(s->outfile);
1807             }
1808             s->outfile = tcc_strdup(optarg);
1809             break;
1810         case TCC_OPTION_r:
1811             /* generate a .o merging several output files */
1812             s->option_r = 1;
1813             x = TCC_OUTPUT_OBJ;
1814             goto set_output_type;
1815         case TCC_OPTION_isystem:
1816             tcc_add_sysinclude_path(s, optarg);
1817             break;
1818         case TCC_OPTION_iwithprefix:
1819             snprintf(buf, sizeof buf, "{B}/%s", optarg);
1820             tcc_add_sysinclude_path(s, buf);
1821             break;
1822         case TCC_OPTION_include:
1823             dynarray_add(&s->cmd_include_files,
1824                          &s->nb_cmd_include_files, tcc_strdup(optarg));
1825             break;
1826         case TCC_OPTION_nostdinc:
1827             s->nostdinc = 1;
1828             break;
1829         case TCC_OPTION_nostdlib:
1830             s->nostdlib = 1;
1831             break;
1832         case TCC_OPTION_run:
1833 #ifndef TCC_IS_NATIVE
1834             tcc_error("-run is not available in a cross compiler");
1835 #endif
1836             run = optarg;
1837             x = TCC_OUTPUT_MEMORY;
1838             goto set_output_type;
1839         case TCC_OPTION_v:
1840             do ++s->verbose; while (*optarg++ == 'v');
1841             ++noaction;
1842             break;
1843         case TCC_OPTION_f:
1844             if (set_flag(s, options_f, optarg) < 0)
1845                 goto unsupported_option;
1846             break;
1847 #ifdef TCC_TARGET_ARM
1848         case TCC_OPTION_mfloat_abi:
1849             /* tcc doesn't support soft float yet */
1850             if (!strcmp(optarg, "softfp")) {
1851                 s->float_abi = ARM_SOFTFP_FLOAT;
1852                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1853             } else if (!strcmp(optarg, "hard"))
1854                 s->float_abi = ARM_HARD_FLOAT;
1855             else
1856                 tcc_error("unsupported float abi '%s'", optarg);
1857             break;
1858 #endif
1859         case TCC_OPTION_m:
1860             if (set_flag(s, options_m, optarg) < 0) {
1861                 if (x = atoi(optarg), x != 32 && x != 64)
1862                     goto unsupported_option;
1863                 if (PTR_SIZE != x/8)
1864                     return x;
1865                 ++noaction;
1866             }
1867             break;
1868         case TCC_OPTION_W:
1869             if (set_flag(s, options_W, optarg) < 0)
1870                 goto unsupported_option;
1871             break;
1872         case TCC_OPTION_w:
1873             s->warn_none = 1;
1874             break;
1875         case TCC_OPTION_rdynamic:
1876             s->rdynamic = 1;
1877             break;
1878         case TCC_OPTION_Wl:
1879             if (linker_arg.size)
1880                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1881             cstr_cat(&linker_arg, optarg, 0);
1882             if (tcc_set_linker(s, linker_arg.data))
1883                 cstr_free(&linker_arg);
1884             break;
1885         case TCC_OPTION_Wp:
1886             r = optarg;
1887             goto reparse;
1888         case TCC_OPTION_E:
1889             x = TCC_OUTPUT_PREPROCESS;
1890             goto set_output_type;
1891         case TCC_OPTION_P:
1892             s->Pflag = atoi(optarg) + 1;
1893             break;
1894         case TCC_OPTION_MD:
1895             s->gen_deps = 1;
1896             break;
1897         case TCC_OPTION_MF:
1898             s->deps_outfile = tcc_strdup(optarg);
1899             break;
1900         case TCC_OPTION_dumpversion:
1901             printf ("%s\n", TCC_VERSION);
1902             exit(0);
1903             break;
1904         case TCC_OPTION_x:
1905             if (*optarg == 'c')
1906                 s->filetype = AFF_TYPE_C;
1907             else if (*optarg == 'a')
1908                 s->filetype = AFF_TYPE_ASMPP;
1909             else if (*optarg == 'n')
1910                 s->filetype = AFF_TYPE_NONE;
1911             else
1912                 tcc_warning("unsupported language '%s'", optarg);
1913             break;
1914         case TCC_OPTION_O:
1915             last_o = atoi(optarg);
1916             break;
1917         case TCC_OPTION_print_search_dirs:
1918             x = OPT_PRINT_DIRS;
1919             goto extra_action;
1920         case TCC_OPTION_impdef:
1921             x = OPT_IMPDEF;
1922             goto extra_action;
1923         case TCC_OPTION_ar:
1924             x = OPT_AR;
1925         extra_action:
1926             arg_start = optind - 1;
1927             if (arg_start != noaction)
1928                 tcc_error("cannot parse %s here", r);
1929             tool = x;
1930             break;
1931         case TCC_OPTION_traditional:
1932         case TCC_OPTION_pedantic:
1933         case TCC_OPTION_pipe:
1934         case TCC_OPTION_s:
1935             /* ignored */
1936             break;
1937         default:
1938 unsupported_option:
1939             if (s->warn_unsupported)
1940                 tcc_warning("unsupported option '%s'", r);
1941             break;
1942         }
1943     }
1944     if (last_o > 0)
1945         tcc_define_symbol(s, "__OPTIMIZE__", NULL);
1946     if (linker_arg.size) {
1947         r = linker_arg.data;
1948         goto arg_err;
1949     }
1950     *pargc = argc - arg_start;
1951     *pargv = argv + arg_start;
1952     if (tool)
1953         return tool;
1954     if (optind != noaction)
1955         return 0;
1956     if (s->verbose == 2)
1957         return OPT_PRINT_DIRS;
1958     if (s->verbose)
1959         return OPT_V;
1960     return OPT_HELP;
1961 }
1962
1963 LIBTCCAPI void tcc_set_options(TCCState *s, const char *r)
1964 {
1965     char **argv = NULL;
1966     int argc = 0;
1967     args_parser_make_argv(r, &argc, &argv);
1968     tcc_parse_args(s, &argc, &argv, 0);
1969     dynarray_reset(&argv, &argc);
1970 }
1971
1972 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time)
1973 {
1974     if (total_time < 1)
1975         total_time = 1;
1976     if (total_bytes < 1)
1977         total_bytes = 1;
1978     fprintf(stderr, "* %d idents, %d lines, %d bytes\n"
1979                     "* %0.3f s, %u lines/s, %0.1f MB/s\n",
1980            tok_ident - TOK_IDENT, total_lines, total_bytes,
1981            (double)total_time/1000,
1982            (unsigned)total_lines*1000/total_time,
1983            (double)total_bytes/1000/total_time);
1984 #ifdef MEM_DEBUG
1985     fprintf(stderr, "* %d bytes memory used\n", mem_max_size);
1986 #endif
1987 }