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 /********************************************************/
  36
  37 #ifdef ONE_SOURCE
  38 #include "tccpp.c"
  39 #include "tccgen.c"
  40 #include "tccelf.c"
  41 #include "tccrun.c"
  42 #ifdef TCC_TARGET_I386
  43 #include "i386-gen.c"
  44 #endif
  45 #ifdef TCC_TARGET_ARM
  46 #include "arm-gen.c"
  47 #endif
  48 #ifdef TCC_TARGET_ARM64
  49 #include "arm64-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_C67
  52 #include "c67-gen.c"
  53 #endif
  54 #ifdef TCC_TARGET_X86_64
  55 #include "x86_64-gen.c"
  56 #endif
  57 #ifdef CONFIG_TCC_ASM
  58 #include "tccasm.c"
  59 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  60 #include "i386-asm.c"
  61 #endif
  62 #endif
  63 #ifdef TCC_TARGET_COFF
  64 #include "tcccoff.c"
  65 #endif
  66 #ifdef TCC_TARGET_PE
  67 #include "tccpe.c"
  68 #endif
  69 #endif /* ONE_SOURCE */
  70
  71 /********************************************************/
  72 #ifndef CONFIG_TCC_ASM
  73 ST_FUNC void asm_instr(void)
  74 {
  75     tcc_error("inline asm() not supported");
  76 }
  77 ST_FUNC void asm_global_instr(void)
  78 {
  79     tcc_error("inline asm() not supported");
  80 }
  81 #endif
  82
  83 /********************************************************/
  84 #ifdef _WIN32
  85 ST_FUNC char *normalize_slashes(char *path)
  86 {
  87     char *p;
  88     for (p = path; *p; ++p)
  89         if (*p == '\\')
  90             *p = '/';
  91     return path;
  92 }
  93
  94 static HMODULE tcc_module;
  95
  96 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  97 static void tcc_set_lib_path_w32(TCCState *s)
  98 {
  99     char path[1024], *p;
 100     GetModuleFileNameA(tcc_module, path, sizeof path);
 101     p = tcc_basename(normalize_slashes(strlwr(path)));
 102     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 103         p -= 5;
 104     else if (p > path)
 105         p--;
 106     *p = 0;
 107     tcc_set_lib_path(s, path);
 108 }
 109
 110 #ifdef TCC_TARGET_PE
 111 static void tcc_add_systemdir(TCCState *s)
 112 {
 113     char buf[1000];
 114     GetSystemDirectory(buf, sizeof buf);
 115     tcc_add_library_path(s, normalize_slashes(buf));
 116 }
 117 #endif
 118
 119 #ifdef LIBTCC_AS_DLL
 120 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 121 {
 122     if (DLL_PROCESS_ATTACH == dwReason)
 123         tcc_module = hDll;
 124     return TRUE;
 125 }
 126 #endif
 127 #endif
 128
 129 /********************************************************/
 130 /* copy a string and truncate it. */
 131 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 132 {
 133     char *q, *q_end;
 134     int c;
 135
 136     if (buf_size > 0) {
 137         q = buf;
 138         q_end = buf + buf_size - 1;
 139         while (q < q_end) {
 140             c = *s++;
 141             if (c == '\0')
 142                 break;
 143             *q++ = c;
 144         }
 145         *q = '\0';
 146     }
 147     return buf;
 148 }
 149
 150 /* strcat and truncate. */
 151 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 152 {
 153     int len;
 154     len = strlen(buf);
 155     if (len < buf_size)
 156         pstrcpy(buf + len, buf_size - len, s);
 157     return buf;
 158 }
 159
 160 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 161 {
 162     memcpy(out, in, num);
 163     out[num] = '\0';
 164     return out;
 165 }
 166
 167 /* extract the basename of a file */
 168 PUB_FUNC char *tcc_basename(const char *name)
 169 {
 170     char *p = strchr(name, 0);
 171     while (p > name && !IS_DIRSEP(p[-1]))
 172         --p;
 173     return p;
 174 }
 175
 176 /* extract extension part of a file
 177  *
 178  * (if no extension, return pointer to end-of-string)
 179  */
 180 PUB_FUNC char *tcc_fileextension (const char *name)
 181 {
 182     char *b = tcc_basename(name);
 183     char *e = strrchr(b, '.');
 184     return e ? e : strchr(b, 0);
 185 }
 186
 187 /********************************************************/
 188 /* memory management */
 189
 190 #undef free
 191 #undef malloc
 192 #undef realloc
 193
 194 #ifndef MEM_DEBUG
 195
 196 PUB_FUNC void tcc_free(void *ptr)
 197 {
 198     free(ptr);
 199 }
 200
 201 PUB_FUNC void *tcc_malloc(unsigned long size)
 202 {
 203     void *ptr;
 204     ptr = malloc(size);
 205     if (!ptr && size)
 206         tcc_error("memory full (malloc)");
 207     return ptr;
 208 }
 209
 210 PUB_FUNC void *tcc_mallocz(unsigned long size)
 211 {
 212     void *ptr;
 213     ptr = tcc_malloc(size);
 214     memset(ptr, 0, size);
 215     return ptr;
 216 }
 217
 218 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 219 {
 220     void *ptr1;
 221     ptr1 = realloc(ptr, size);
 222     if (!ptr1 && size)
 223         tcc_error("memory full (realloc)");
 224     return ptr1;
 225 }
 226
 227 PUB_FUNC char *tcc_strdup(const char *str)
 228 {
 229     char *ptr;
 230     ptr = tcc_malloc(strlen(str) + 1);
 231     strcpy(ptr, str);
 232     return ptr;
 233 }
 234
 235 PUB_FUNC void tcc_memstats(int bench)
 236 {
 237 }
 238
 239 #else
 240
 241 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 242 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 243 #define MEM_DEBUG_FILE_LEN 15
 244
 245 struct mem_debug_header {
 246     size_t      magic1;
 247     size_t      size;
 248     struct mem_debug_header *prev;
 249     struct mem_debug_header *next;
 250     size_t      line_num;
 251     char        file_name[MEM_DEBUG_FILE_LEN + 1];
 252     size_t      magic2;
 253 };
 254
 255 typedef struct mem_debug_header mem_debug_header_t;
 256
 257 static mem_debug_header_t *mem_debug_chain;
 258 static size_t mem_cur_size;
 259 static size_t mem_max_size;
 260
 261 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 262 {
 263     void *ptr;
 264     int ofs;
 265
 266     mem_debug_header_t *header;
 267
 268     ptr = malloc(sizeof(mem_debug_header_t) + size);
 269     if (!ptr)
 270         tcc_error("memory full (malloc)");
 271
 272     mem_cur_size += size;
 273     if (mem_cur_size > mem_max_size)
 274         mem_max_size = mem_cur_size;
 275
 276     header = (mem_debug_header_t *)ptr;
 277
 278     header->magic1 = MEM_DEBUG_MAGIC1;
 279     header->magic2 = MEM_DEBUG_MAGIC2;
 280     header->size = size;
 281     header->line_num = line;
 282
 283     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 284     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 285     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 286
 287     header->next = mem_debug_chain;
 288     header->prev = NULL;
 289
 290     if (header->next)
 291         header->next->prev = header;
 292
 293     mem_debug_chain = header;
 294
 295     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 296     return ptr;
 297 }
 298
 299 PUB_FUNC void tcc_free_debug(void *ptr)
 300 {
 301     mem_debug_header_t *header;
 302
 303     if (!ptr)
 304         return;
 305
 306     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 307     header = (mem_debug_header_t *)ptr;
 308     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 309         header->magic2 != MEM_DEBUG_MAGIC2 ||
 310         header->size == (size_t)-1 )
 311     {
 312         tcc_error("tcc_free check failed");
 313     }
 314
 315     mem_cur_size -= header->size;
 316     header->size = (size_t)-1;
 317
 318     if (header->next)
 319         header->next->prev = header->prev;
 320
 321     if (header->prev)
 322         header->prev->next = header->next;
 323
 324     if (header == mem_debug_chain)
 325         mem_debug_chain = header->next;
 326
 327     free(ptr);
 328 }
 329
 330
 331 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 332 {
 333     void *ptr;
 334     ptr = tcc_malloc_debug(size,file,line);
 335     memset(ptr, 0, size);
 336     return ptr;
 337 }
 338
 339 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 340 {
 341     mem_debug_header_t *header;
 342     int mem_debug_chain_update = 0;
 343
 344     if (!ptr) {
 345         ptr = tcc_malloc_debug(size, file, line);
 346         return ptr;
 347     }
 348
 349     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 350     header = (mem_debug_header_t *)ptr;
 351     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 352         header->magic2 != MEM_DEBUG_MAGIC2 ||
 353         header->size == (size_t)-1 )
 354     {
 355         check_error:
 356             tcc_error("tcc_realloc check failed");
 357     }
 358
 359     mem_debug_chain_update = (header == mem_debug_chain);
 360
 361     mem_cur_size -= header->size;
 362     ptr = realloc(ptr, sizeof(mem_debug_header_t) + size);
 363     if (!ptr)
 364         tcc_error("memory full (realloc)");
 365
 366     header = (mem_debug_header_t *)ptr;
 367     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 368         header->magic2 != MEM_DEBUG_MAGIC2)
 369     {
 370         goto check_error;
 371     }
 372
 373     mem_cur_size += size;
 374     if (mem_cur_size > mem_max_size)
 375         mem_max_size = mem_cur_size;
 376
 377     header->size = size;
 378     if (header->next)
 379         header->next->prev = header;
 380
 381     if (header->prev)
 382         header->prev->next = header;
 383
 384     if (mem_debug_chain_update)
 385         mem_debug_chain = header;
 386
 387     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 388     return ptr;
 389 }
 390
 391 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 392 {
 393     char *ptr;
 394     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 395     strcpy(ptr, str);
 396     return ptr;
 397 }
 398
 399 PUB_FUNC void tcc_memstats(int bench)
 400 {
 401     if (mem_cur_size) {
 402         mem_debug_header_t *header = mem_debug_chain;
 403
 404         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 405             mem_cur_size, mem_max_size);
 406
 407         while (header) {
 408             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 409                 header->file_name, header->line_num, header->size);
 410             header = header->next;
 411         }
 412     }
 413     else if (bench)
 414         fprintf(stderr, "mem_max_size= %d bytes\n", mem_max_size);
 415 }
 416
 417 #undef MEM_DEBUG_MAGIC1
 418 #undef MEM_DEBUG_MAGIC2
 419 #undef MEM_DEBUG_FILE_LEN
 420
 421 #endif
 422
 423 #define free(p) use_tcc_free(p)
 424 #define malloc(s) use_tcc_malloc(s)
 425 #define realloc(p, s) use_tcc_realloc(p, s)
 426
 427 /********************************************************/
 428 /* dynarrays */
 429
 430 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 431 {
 432     int nb, nb_alloc;
 433     void **pp;
 434
 435     nb = *nb_ptr;
 436     pp = *ptab;
 437     /* every power of two we double array size */
 438     if ((nb & (nb - 1)) == 0) {
 439         if (!nb)
 440             nb_alloc = 1;
 441         else
 442             nb_alloc = nb * 2;
 443         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 444         *ptab = pp;
 445     }
 446     pp[nb++] = data;
 447     *nb_ptr = nb;
 448 }
 449
 450 ST_FUNC void dynarray_reset(void *pp, int *n)
 451 {
 452     void **p;
 453     for (p = *(void***)pp; *n; ++p, --*n)
 454         if (*p)
 455             tcc_free(*p);
 456     tcc_free(*(void**)pp);
 457     *(void**)pp = NULL;
 458 }
 459
 460 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 461 {
 462     const char *p;
 463     do {
 464         int c;
 465         CString str;
 466
 467         cstr_new(&str);
 468         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 469             if (c == '{' && p[1] && p[2] == '}') {
 470                 c = p[1], p += 2;
 471                 if (c == 'B')
 472                     cstr_cat(&str, s->tcc_lib_path, -1);
 473             } else {
 474                 cstr_ccat(&str, c);
 475             }
 476         }
 477         if (str.size) {
 478             cstr_ccat(&str, '\0');
 479             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 480         }
 481         cstr_free(&str);
 482         in = p+1;
 483     } while (*p);
 484 }
 485
 486 /********************************************************/
 487
 488 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 489 {
 490     int len;
 491     len = strlen(buf);
 492     vsnprintf(buf + len, buf_size - len, fmt, ap);
 493 }
 494
 495 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 496 {
 497     va_list ap;
 498     va_start(ap, fmt);
 499     strcat_vprintf(buf, buf_size, fmt, ap);
 500     va_end(ap);
 501 }
 502
 503 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 504 {
 505     char buf[2048];
 506     BufferedFile **pf, *f;
 507
 508     buf[0] = '\0';
 509     /* use upper file if inline ":asm:" or token ":paste:" */
 510     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 511      ;
 512     if (f) {
 513         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 514             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 515                 (*pf)->filename, (*pf)->line_num);
 516         if (f->line_num > 0) {
 517             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 518                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 519         } else {
 520             strcat_printf(buf, sizeof(buf), "%s: ",
 521                 f->filename);
 522         }
 523     } else {
 524         strcat_printf(buf, sizeof(buf), "tcc: ");
 525     }
 526     if (is_warning)
 527         strcat_printf(buf, sizeof(buf), "warning: ");
 528     else
 529         strcat_printf(buf, sizeof(buf), "error: ");
 530     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 531
 532     if (!s1->error_func) {
 533         /* default case: stderr */
 534         if (s1->ppfp) /* print a newline during tcc -E */
 535             fprintf(s1->ppfp, "\n"), fflush(s1->ppfp);
 536         fprintf(stderr, "%s\n", buf);
 537         fflush(stderr); /* print error/warning now (win32) */
 538     } else {
 539         s1->error_func(s1->error_opaque, buf);
 540     }
 541     if (!is_warning || s1->warn_error)
 542         s1->nb_errors++;
 543 }
 544
 545 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 546                         void (*error_func)(void *opaque, const char *msg))
 547 {
 548     s->error_opaque = error_opaque;
 549     s->error_func = error_func;
 550 }
 551
 552 /* error without aborting current compilation */
 553 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 554 {
 555     TCCState *s1 = tcc_state;
 556     va_list ap;
 557
 558     va_start(ap, fmt);
 559     error1(s1, 0, fmt, ap);
 560     va_end(ap);
 561 }
 562
 563 PUB_FUNC void tcc_error(const char *fmt, ...)
 564 {
 565     TCCState *s1 = tcc_state;
 566     va_list ap;
 567
 568     va_start(ap, fmt);
 569     error1(s1, 0, fmt, ap);
 570     va_end(ap);
 571     /* better than nothing: in some cases, we accept to handle errors */
 572     if (s1->error_set_jmp_enabled) {
 573         longjmp(s1->error_jmp_buf, 1);
 574     } else {
 575         /* XXX: eliminate this someday */
 576         exit(1);
 577     }
 578 }
 579
 580 PUB_FUNC void tcc_warning(const char *fmt, ...)
 581 {
 582     TCCState *s1 = tcc_state;
 583     va_list ap;
 584
 585     if (s1->warn_none)
 586         return;
 587
 588     va_start(ap, fmt);
 589     error1(s1, 1, fmt, ap);
 590     va_end(ap);
 591 }
 592
 593 /********************************************************/
 594 /* I/O layer */
 595
 596 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 597 {
 598     BufferedFile *bf;
 599     int buflen = initlen ? initlen : IO_BUF_SIZE;
 600
 601     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 602     bf->buf_ptr = bf->buffer;
 603     bf->buf_end = bf->buffer + initlen;
 604     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 605     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 606 #ifdef _WIN32
 607     normalize_slashes(bf->filename);
 608 #endif
 609     bf->line_num = 1;
 610     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 611     bf->fd = -1;
 612     bf->prev = file;
 613     file = bf;
 614 }
 615
 616 ST_FUNC void tcc_close(void)
 617 {
 618     BufferedFile *bf = file;
 619     if (bf->fd > 0) {
 620         close(bf->fd);
 621         total_lines += bf->line_num;
 622     }
 623     file = bf->prev;
 624     tcc_free(bf);
 625 }
 626
 627 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 628 {
 629     int fd;
 630     if (strcmp(filename, "-") == 0)
 631         fd = 0, filename = "<stdin>";
 632     else
 633         fd = open(filename, O_RDONLY | O_BINARY);
 634     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 635         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 636                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 637     if (fd < 0)
 638         return -1;
 639
 640     tcc_open_bf(s1, filename, 0);
 641     file->fd = fd;
 642     return fd;
 643 }
 644
 645 /* compile the C file opened in 'file'. Return non zero if errors. */
 646 static int tcc_compile(TCCState *s1)
 647 {
 648     Sym *define_start;
 649
 650     preprocess_start(s1);
 651     define_start = define_stack;
 652
 653     if (setjmp(s1->error_jmp_buf) == 0) {
 654         s1->nb_errors = 0;
 655         s1->error_set_jmp_enabled = 1;
 656
 657         tccgen_start(s1);
 658 #ifdef INC_DEBUG
 659         printf("%s: **** new file\n", file->filename);
 660 #endif
 661         ch = file->buf_ptr[0];
 662         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 663         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
 664         next();
 665         decl(VT_CONST);
 666         if (tok != TOK_EOF)
 667             expect("declaration");
 668         tccgen_end(s1);
 669     }
 670     s1->error_set_jmp_enabled = 0;
 671
 672     free_inline_functions(s1);
 673     /* reset define stack, but keep -D and built-ins */
 674     free_defines(define_start);
 675     sym_pop(&global_stack, NULL);
 676     sym_pop(&local_stack, NULL);
 677     return s1->nb_errors != 0 ? -1 : 0;
 678 }
 679
 680 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 681 {
 682     int len, ret;
 683
 684     len = strlen(str);
 685     tcc_open_bf(s, "<string>", len);
 686     memcpy(file->buffer, str, len);
 687     ret = tcc_compile(s);
 688     tcc_close();
 689     return ret;
 690 }
 691
 692 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 693 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 694 {
 695     int len1, len2;
 696     /* default value */
 697     if (!value)
 698         value = "1";
 699     len1 = strlen(sym);
 700     len2 = strlen(value);
 701
 702     /* init file structure */
 703     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 704     memcpy(file->buffer, sym, len1);
 705     file->buffer[len1] = ' ';
 706     memcpy(file->buffer + len1 + 1, value, len2);
 707
 708     /* parse with define parser */
 709     ch = file->buf_ptr[0];
 710     next_nomacro();
 711     parse_define();
 712
 713     tcc_close();
 714 }
 715
 716 /* undefine a preprocessor symbol */
 717 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 718 {
 719     TokenSym *ts;
 720     Sym *s;
 721     ts = tok_alloc(sym, strlen(sym));
 722     s = define_find(ts->tok);
 723     /* undefine symbol by putting an invalid name */
 724     if (s)
 725         define_undef(s);
 726 }
 727
 728 /* cleanup all static data used during compilation */
 729 static void tcc_cleanup(void)
 730 {
 731     if (NULL == tcc_state)
 732         return;
 733     tccpp_delete(tcc_state);
 734     tcc_state = NULL;
 735     /* free sym_pools */
 736     dynarray_reset(&sym_pools, &nb_sym_pools);
 737     /* reset symbol stack */
 738     sym_free_first = NULL;
 739 }
 740
 741 LIBTCCAPI TCCState *tcc_new(void)
 742 {
 743     TCCState *s;
 744
 745     tcc_cleanup();
 746
 747     s = tcc_mallocz(sizeof(TCCState));
 748     if (!s)
 749         return NULL;
 750     tcc_state = s;
 751
 752     s->alacarte_link = 1;
 753     s->nocommon = 1;
 754     s->warn_implicit_function_declaration = 1;
 755     s->ms_bitfields = 0;
 756
 757 #ifdef CHAR_IS_UNSIGNED
 758     s->char_is_unsigned = 1;
 759 #endif
 760 #ifdef TCC_TARGET_I386
 761     s->seg_size = 32;
 762 #endif
 763 #ifdef TCC_IS_NATIVE
 764     s->runtime_main = "main";
 765 #endif
 766     /* enable this if you want symbols with leading underscore on windows: */
 767 #if 0 /* def TCC_TARGET_PE */
 768     s->leading_underscore = 1;
 769 #endif
 770 #ifdef _WIN32
 771     tcc_set_lib_path_w32(s);
 772 #else
 773     tcc_set_lib_path(s, CONFIG_TCCDIR);
 774 #endif
 775     tccelf_new(s);
 776     tccpp_new(s);
 777
 778     /* we add dummy defines for some special macros to speed up tests
 779        and to have working defined() */
 780     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 781     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 782     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 783     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 784     {
 785         /* define __TINYC__ 92X  */
 786         char buffer[32]; int a,b,c;
 787         sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 788         sprintf(buffer, "%d", a*10000 + b*100 + c);
 789         tcc_define_symbol(s, "__TINYC__", buffer);
 790     }
 791
 792     /* standard defines */
 793     tcc_define_symbol(s, "__STDC__", NULL);
 794     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 795     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 796
 797     /* target defines */
 798 #if defined(TCC_TARGET_I386)
 799     tcc_define_symbol(s, "__i386__", NULL);
 800     tcc_define_symbol(s, "__i386", NULL);
 801     tcc_define_symbol(s, "i386", NULL);
 802 #elif defined(TCC_TARGET_X86_64)
 803     tcc_define_symbol(s, "__x86_64__", NULL);
 804 #elif defined(TCC_TARGET_ARM)
 805     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 806     tcc_define_symbol(s, "__arm_elf__", NULL);
 807     tcc_define_symbol(s, "__arm_elf", NULL);
 808     tcc_define_symbol(s, "arm_elf", NULL);
 809     tcc_define_symbol(s, "__arm__", NULL);
 810     tcc_define_symbol(s, "__arm", NULL);
 811     tcc_define_symbol(s, "arm", NULL);
 812     tcc_define_symbol(s, "__APCS_32__", NULL);
 813     tcc_define_symbol(s, "__ARMEL__", NULL);
 814 #if defined(TCC_ARM_EABI)
 815     tcc_define_symbol(s, "__ARM_EABI__", NULL);
 816 #endif
 817 #if defined(TCC_ARM_HARDFLOAT)
 818     s->float_abi = ARM_HARD_FLOAT;
 819     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
 820 #else
 821     s->float_abi = ARM_SOFTFP_FLOAT;
 822 #endif
 823 #elif defined(TCC_TARGET_ARM64)
 824     tcc_define_symbol(s, "__aarch64__", NULL);
 825 #endif
 826
 827 #ifdef TCC_TARGET_PE
 828     tcc_define_symbol(s, "_WIN32", NULL);
 829 # ifdef TCC_TARGET_X86_64
 830     tcc_define_symbol(s, "_WIN64", NULL);
 831 # endif
 832 #else
 833     tcc_define_symbol(s, "__unix__", NULL);
 834     tcc_define_symbol(s, "__unix", NULL);
 835     tcc_define_symbol(s, "unix", NULL);
 836 # if defined(__linux__)
 837     tcc_define_symbol(s, "__linux__", NULL);
 838     tcc_define_symbol(s, "__linux", NULL);
 839 # endif
 840 # if defined(__FreeBSD__)
 841     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
 842     /* No 'Thread Storage Local' on FreeBSD with tcc */
 843     tcc_define_symbol(s, "__NO_TLS", NULL);
 844 # endif
 845 # if defined(__FreeBSD_kernel__)
 846     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 847 # endif
 848 #endif
 849 # if defined(__NetBSD__)
 850     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
 851 # endif
 852 # if defined(__OpenBSD__)
 853     tcc_define_symbol(s, "__OpenBSD__", "__OpenBSD__");
 854 # endif
 855
 856     /* TinyCC & gcc defines */
 857 #if defined(TCC_TARGET_PE) && defined(TCC_TARGET_X86_64)
 858     /* 64bit Windows. */
 859     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 860     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 861     tcc_define_symbol(s, "__LLP64__", NULL);
 862 #elif defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_ARM64)
 863     /* Other 64bit systems. */
 864     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 865     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 866     tcc_define_symbol(s, "__LP64__", NULL);
 867 #else
 868     /* Other 32bit systems. */
 869     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 870     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 871     tcc_define_symbol(s, "__ILP32__", NULL);
 872 #endif
 873
 874 #ifdef TCC_TARGET_PE
 875     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 876     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
 877 #else
 878     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 879     /* wint_t is unsigned int by default, but (signed) int on BSDs
 880        and unsigned short on windows.  Other OSes might have still
 881        other conventions, sigh.  */
 882 # if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) \
 883   || defined(__NetBSD__) || defined(__OpenBSD__)
 884     tcc_define_symbol(s, "__WINT_TYPE__", "int");
 885 #  ifdef __FreeBSD__
 886     /* define __GNUC__ to have some useful stuff from sys/cdefs.h
 887        that are unconditionally used in FreeBSDs other system headers :/ */
 888     tcc_define_symbol(s, "__GNUC__", "2");
 889     tcc_define_symbol(s, "__GNUC_MINOR__", "7");
 890     tcc_define_symbol(s, "__builtin_alloca", "alloca");
 891 #  endif
 892 # else
 893     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
 894     /* glibc defines */
 895     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)",
 896         "name proto __asm__ (#alias)");
 897     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)",
 898         "name proto __asm__ (#alias) __THROW");
 899 # endif
 900 #endif /* ndef TCC_TARGET_PE */
 901
 902     return s;
 903 }
 904
 905 LIBTCCAPI void tcc_delete(TCCState *s1)
 906 {
 907     int bench = s1->do_bench;
 908
 909     tcc_cleanup();
 910
 911     /* free sections */
 912     tccelf_delete(s1);
 913
 914     /* free library paths */
 915     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
 916     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
 917
 918     /* free include paths */
 919     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
 920     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
 921     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
 922
 923     tcc_free(s1->tcc_lib_path);
 924     tcc_free(s1->soname);
 925     tcc_free(s1->rpath);
 926     tcc_free(s1->init_symbol);
 927     tcc_free(s1->fini_symbol);
 928     tcc_free(s1->outfile);
 929     tcc_free(s1->deps_outfile);
 930     dynarray_reset(&s1->files, &s1->nb_files);
 931     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
 932     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
 933
 934 #ifdef TCC_IS_NATIVE
 935     /* free runtime memory */
 936     tcc_run_free(s1);
 937 #endif
 938
 939     tcc_free(s1->sym_attrs);
 940     tcc_free(s1);
 941     tcc_memstats(bench);
 942 }
 943
 944 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
 945 {
 946     s->output_type = output_type;
 947
 948     /* always elf for objects */
 949     if (output_type == TCC_OUTPUT_OBJ)
 950         s->output_format = TCC_OUTPUT_FORMAT_ELF;
 951
 952     if (s->char_is_unsigned)
 953         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
 954
 955     if (!s->nostdinc) {
 956         /* default include paths */
 957         /* -isystem paths have already been handled */
 958         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
 959     }
 960
 961 #ifdef CONFIG_TCC_BCHECK
 962     if (s->do_bounds_check) {
 963         /* if bound checking, then add corresponding sections */
 964         tccelf_bounds_new(s);
 965         /* define symbol */
 966         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
 967     }
 968 #endif
 969     if (s->do_debug) {
 970         /* add debug sections */
 971         tccelf_stab_new(s);
 972     }
 973
 974     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 975
 976 #ifdef TCC_TARGET_PE
 977 # ifdef _WIN32
 978     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
 979         tcc_add_systemdir(s);
 980 # endif
 981 #else
 982     /* paths for crt objects */
 983     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 984     /* add libc crt1/crti objects */
 985     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
 986         !s->nostdlib) {
 987         if (output_type != TCC_OUTPUT_DLL)
 988             tcc_add_crt(s, "crt1.o");
 989         tcc_add_crt(s, "crti.o");
 990     }
 991 #endif
 992     return 0;
 993 }
 994
 995 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
 996 {
 997     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
 998     return 0;
 999 }
1000
1001 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1002 {
1003     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1004     return 0;
1005 }
1006
1007 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1008 {
1009     int ret, filetype;
1010
1011     filetype = flags & 0x0F;
1012     if (filetype == 0) {
1013         /* use a file extension to detect a filetype */
1014         const char *ext = tcc_fileextension(filename);
1015         if (ext[0]) {
1016             ext++;
1017             if (!strcmp(ext, "S"))
1018                 filetype = AFF_TYPE_ASMPP;
1019             else if (!strcmp(ext, "s"))
1020                 filetype = AFF_TYPE_ASM;
1021             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1022                 filetype = AFF_TYPE_C;
1023             else
1024                 filetype = AFF_TYPE_BIN;
1025         } else {
1026             filetype = AFF_TYPE_C;
1027         }
1028     }
1029
1030     /* open the file */
1031     ret = tcc_open(s1, filename);
1032     if (ret < 0) {
1033         if (flags & AFF_PRINT_ERROR)
1034             tcc_error_noabort("file '%s' not found", filename);
1035         return ret;
1036     }
1037
1038     /* update target deps */
1039     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1040             tcc_strdup(filename));
1041
1042     parse_flags = 0;
1043     /* if .S file, define __ASSEMBLER__ like gcc does */
1044     if (filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP) {
1045         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1046         parse_flags = PARSE_FLAG_ASM_FILE;
1047     }
1048
1049     if (flags & AFF_PREPROCESS) {
1050         ret = tcc_preprocess(s1);
1051     } else if (filetype == AFF_TYPE_C) {
1052         ret = tcc_compile(s1);
1053 #ifdef CONFIG_TCC_ASM
1054     } else if (filetype == AFF_TYPE_ASMPP) {
1055         /* non preprocessed assembler */
1056         ret = tcc_assemble(s1, 1);
1057     } else if (filetype == AFF_TYPE_ASM) {
1058         /* preprocessed assembler */
1059         ret = tcc_assemble(s1, 0);
1060 #endif
1061     } else {
1062         ElfW(Ehdr) ehdr;
1063         int fd, obj_type;
1064
1065         fd = file->fd;
1066         obj_type = tcc_object_type(fd, &ehdr);
1067         lseek(fd, 0, SEEK_SET);
1068
1069         /* do not display line number if error */
1070         file->line_num = 0;
1071
1072         switch (obj_type) {
1073         case AFF_BINTYPE_REL:
1074             ret = tcc_load_object_file(s1, fd, 0);
1075             break;
1076 #ifndef TCC_TARGET_PE
1077         case AFF_BINTYPE_DYN:
1078             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1079                 ret = 0;
1080 #ifdef TCC_IS_NATIVE
1081                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1082                     ret = -1;
1083 #endif
1084             } else {
1085                 ret = tcc_load_dll(s1, fd, filename,
1086                                    (flags & AFF_REFERENCED_DLL) != 0);
1087             }
1088             break;
1089 #endif
1090         case AFF_BINTYPE_AR:
1091             ret = tcc_load_archive(s1, fd);
1092             break;
1093 #ifdef TCC_TARGET_COFF
1094         case AFF_BINTYPE_C67:
1095             ret = tcc_load_coff(s1, fd);
1096             break;
1097 #endif
1098         default:
1099 #ifdef TCC_TARGET_PE
1100             ret = pe_load_file(s1, filename, fd);
1101 #else
1102             /* as GNU ld, consider it is an ld script if not recognized */
1103             ret = tcc_load_ldscript(s1);
1104 #endif
1105             if (ret < 0)
1106                 tcc_error_noabort("unrecognized file type");
1107             break;
1108         }
1109     }
1110     tcc_close();
1111     return ret;
1112 }
1113
1114 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1115 {
1116     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1117         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS | s->filetype);
1118     else
1119         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | s->filetype);
1120 }
1121
1122 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1123 {
1124     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1125     return 0;
1126 }
1127
1128 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1129     const char *filename, int flags, char **paths, int nb_paths)
1130 {
1131     char buf[1024];
1132     int i;
1133
1134     for(i = 0; i < nb_paths; i++) {
1135         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1136         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1137             return 0;
1138     }
1139     return -1;
1140 }
1141
1142 #ifndef TCC_TARGET_PE
1143 /* find and load a dll. Return non zero if not found */
1144 /* XXX: add '-rpath' option support ? */
1145 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1146 {
1147     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1148         s->library_paths, s->nb_library_paths);
1149 }
1150 #endif
1151
1152 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1153 {
1154     if (-1 == tcc_add_library_internal(s, "%s/%s",
1155         filename, 0, s->crt_paths, s->nb_crt_paths))
1156         tcc_error_noabort("file '%s' not found", filename);
1157     return 0;
1158 }
1159
1160 /* the library name is the same as the argument of the '-l' option */
1161 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1162 {
1163 #ifdef TCC_TARGET_PE
1164     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1165     const char **pp = s->static_link ? libs + 4 : libs;
1166 #else
1167     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1168     const char **pp = s->static_link ? libs + 1 : libs;
1169 #endif
1170     while (*pp) {
1171         if (0 == tcc_add_library_internal(s, *pp,
1172             libraryname, 0, s->library_paths, s->nb_library_paths))
1173             return 0;
1174         ++pp;
1175     }
1176     return -1;
1177 }
1178
1179 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1180 {
1181     int ret = tcc_add_library(s, libname);
1182     if (ret < 0)
1183         tcc_error_noabort("library 'lib%s' not found", libname);
1184     return ret;
1185 }
1186
1187 /* habdle #pragma comment(lib,) */
1188 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1189 {
1190     int i;
1191     for (i = 0; i < s1->nb_pragma_libs; i++)
1192         tcc_add_library_err(s1, s1->pragma_libs[i]);
1193 }
1194
1195 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1196 {
1197 #ifdef TCC_TARGET_PE
1198     /* On x86_64 'val' might not be reachable with a 32bit offset.
1199        So it is handled here as if it were in a DLL. */
1200     pe_putimport(s, 0, name, (uintptr_t)val);
1201 #else
1202     set_elf_sym(symtab_section, (uintptr_t)val, 0,
1203         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1204         SHN_ABS, name);
1205 #endif
1206     return 0;
1207 }
1208
1209 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1210 {
1211     tcc_free(s->tcc_lib_path);
1212     s->tcc_lib_path = tcc_strdup(path);
1213 }
1214
1215 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1216 #define FD_INVERT 0x0002 /* invert value before storing */
1217
1218 typedef struct FlagDef {
1219     uint16_t offset;
1220     uint16_t flags;
1221     const char *name;
1222 } FlagDef;
1223
1224 static const FlagDef warning_defs[] = {
1225     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1226     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1227     { offsetof(TCCState, warn_error), 0, "error" },
1228     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1229       "implicit-function-declaration" },
1230 };
1231
1232 static int no_flag(const char **pp)
1233 {
1234     const char *p = *pp;
1235     if (*p != 'n' || *++p != 'o' || *++p != '-')
1236         return 0;
1237     *pp = p + 1;
1238     return 1;
1239 }
1240
1241 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1242                     const char *name, int value)
1243 {
1244     int i;
1245     const FlagDef *p;
1246     const char *r;
1247
1248     r = name;
1249     if (no_flag(&r))
1250         value = !value;
1251
1252     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1253         if (!strcmp(r, p->name))
1254             goto found;
1255     }
1256     return -1;
1257  found:
1258     if (p->flags & FD_INVERT)
1259         value = !value;
1260     *(int *)((uint8_t *)s + p->offset) = value;
1261     return 0;
1262 }
1263
1264 /* set/reset a warning */
1265 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1266 {
1267     int i;
1268     const FlagDef *p;
1269
1270     if (!strcmp(warning_name, "all")) {
1271         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1272             if (p->flags & WD_ALL)
1273                 *(int *)((uint8_t *)s + p->offset) = 1;
1274         }
1275         return 0;
1276     } else {
1277         return set_flag(s, warning_defs, countof(warning_defs),
1278                         warning_name, value);
1279     }
1280 }
1281
1282 static const FlagDef flag_defs[] = {
1283     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1284     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1285     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1286     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1287     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1288     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1289     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1290 };
1291
1292 /* set/reset a flag */
1293 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1294 {
1295     return set_flag(s, flag_defs, countof(flag_defs),
1296                     flag_name, value);
1297 }
1298
1299
1300 static int strstart(const char *val, const char **str)
1301 {
1302     const char *p, *q;
1303     p = *str;
1304     q = val;
1305     while (*q) {
1306         if (*p != *q)
1307             return 0;
1308         p++;
1309         q++;
1310     }
1311     *str = p;
1312     return 1;
1313 }
1314
1315 /* Like strstart, but automatically takes into account that ld options can
1316  *
1317  * - start with double or single dash (e.g. '--soname' or '-soname')
1318  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1319  *   or '-Wl,-soname=x.so')
1320  *
1321  * you provide `val` always in 'option[=]' form (no leading -)
1322  */
1323 static int link_option(const char *str, const char *val, const char **ptr)
1324 {
1325     const char *p, *q;
1326     int ret;
1327
1328     /* there should be 1 or 2 dashes */
1329     if (*str++ != '-')
1330         return 0;
1331     if (*str == '-')
1332         str++;
1333
1334     /* then str & val should match (potentialy up to '=') */
1335     p = str;
1336     q = val;
1337
1338     ret = 1;
1339     if (q[0] == '?') {
1340         ++q;
1341         if (no_flag(&p))
1342             ret = -1;
1343     }
1344
1345     while (*q != '\0' && *q != '=') {
1346         if (*p != *q)
1347             return 0;
1348         p++;
1349         q++;
1350     }
1351
1352     /* '=' near eos means ',' or '=' is ok */
1353     if (*q == '=') {
1354         if (*p == 0)
1355             *ptr = p;
1356         if (*p != ',' && *p != '=')
1357             return 0;
1358         p++;
1359     }
1360     *ptr = p;
1361     return ret;
1362 }
1363
1364 static const char *skip_linker_arg(const char **str)
1365 {
1366     const char *s1 = *str;
1367     const char *s2 = strchr(s1, ',');
1368     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1369     return s2;
1370 }
1371
1372 static char *copy_linker_arg(const char *p)
1373 {
1374     const char *q = p;
1375     skip_linker_arg(&q);
1376     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1377 }
1378
1379 /* set linker options */
1380 static int tcc_set_linker(TCCState *s, const char *option)
1381 {
1382     while (*option) {
1383
1384         const char *p = NULL;
1385         char *end = NULL;
1386         int ignoring = 0;
1387         int ret;
1388
1389         if (link_option(option, "Bsymbolic", &p)) {
1390             s->symbolic = 1;
1391         } else if (link_option(option, "nostdlib", &p)) {
1392             s->nostdlib = 1;
1393         } else if (link_option(option, "fini=", &p)) {
1394             s->fini_symbol = copy_linker_arg(p);
1395             ignoring = 1;
1396         } else if (link_option(option, "image-base=", &p)
1397                 || link_option(option, "Ttext=", &p)) {
1398             s->text_addr = strtoull(p, &end, 16);
1399             s->has_text_addr = 1;
1400         } else if (link_option(option, "init=", &p)) {
1401             s->init_symbol = copy_linker_arg(p);
1402             ignoring = 1;
1403         } else if (link_option(option, "oformat=", &p)) {
1404 #if defined(TCC_TARGET_PE)
1405             if (strstart("pe-", &p)) {
1406 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1407             if (strstart("elf64-", &p)) {
1408 #else
1409             if (strstart("elf32-", &p)) {
1410 #endif
1411                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1412             } else if (!strcmp(p, "binary")) {
1413                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1414 #ifdef TCC_TARGET_COFF
1415             } else if (!strcmp(p, "coff")) {
1416                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1417 #endif
1418             } else
1419                 goto err;
1420
1421         } else if (link_option(option, "as-needed", &p)) {
1422             ignoring = 1;
1423         } else if (link_option(option, "O", &p)) {
1424             ignoring = 1;
1425         } else if (link_option(option, "rpath=", &p)) {
1426             s->rpath = copy_linker_arg(p);
1427         } else if (link_option(option, "section-alignment=", &p)) {
1428             s->section_align = strtoul(p, &end, 16);
1429         } else if (link_option(option, "soname=", &p)) {
1430             s->soname = copy_linker_arg(p);
1431 #ifdef TCC_TARGET_PE
1432         } else if (link_option(option, "file-alignment=", &p)) {
1433             s->pe_file_align = strtoul(p, &end, 16);
1434         } else if (link_option(option, "stack=", &p)) {
1435             s->pe_stack_size = strtoul(p, &end, 10);
1436         } else if (link_option(option, "subsystem=", &p)) {
1437 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1438             if (!strcmp(p, "native")) {
1439                 s->pe_subsystem = 1;
1440             } else if (!strcmp(p, "console")) {
1441                 s->pe_subsystem = 3;
1442             } else if (!strcmp(p, "gui")) {
1443                 s->pe_subsystem = 2;
1444             } else if (!strcmp(p, "posix")) {
1445                 s->pe_subsystem = 7;
1446             } else if (!strcmp(p, "efiapp")) {
1447                 s->pe_subsystem = 10;
1448             } else if (!strcmp(p, "efiboot")) {
1449                 s->pe_subsystem = 11;
1450             } else if (!strcmp(p, "efiruntime")) {
1451                 s->pe_subsystem = 12;
1452             } else if (!strcmp(p, "efirom")) {
1453                 s->pe_subsystem = 13;
1454 #elif defined(TCC_TARGET_ARM)
1455             if (!strcmp(p, "wince")) {
1456                 s->pe_subsystem = 9;
1457 #endif
1458             } else
1459                 goto err;
1460 #endif
1461         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1462             s->alacarte_link = ret < 0;
1463         } else if (p) {
1464             return 0;
1465         } else {
1466     err:
1467             tcc_error("unsupported linker option '%s'", option);
1468         }
1469
1470         if (ignoring && s->warn_unsupported)
1471             tcc_warning("unsupported linker option '%s'", option);
1472
1473         option = skip_linker_arg(&p);
1474     }
1475     return 1;
1476 }
1477
1478 typedef struct TCCOption {
1479     const char *name;
1480     uint16_t index;
1481     uint16_t flags;
1482 } TCCOption;
1483
1484 enum {
1485     TCC_OPTION_HELP,
1486     TCC_OPTION_I,
1487     TCC_OPTION_D,
1488     TCC_OPTION_U,
1489     TCC_OPTION_P,
1490     TCC_OPTION_L,
1491     TCC_OPTION_B,
1492     TCC_OPTION_l,
1493     TCC_OPTION_bench,
1494     TCC_OPTION_bt,
1495     TCC_OPTION_b,
1496     TCC_OPTION_g,
1497     TCC_OPTION_c,
1498     TCC_OPTION_dumpversion,
1499     TCC_OPTION_d,
1500     TCC_OPTION_float_abi,
1501     TCC_OPTION_static,
1502     TCC_OPTION_std,
1503     TCC_OPTION_shared,
1504     TCC_OPTION_soname,
1505     TCC_OPTION_o,
1506     TCC_OPTION_r,
1507     TCC_OPTION_s,
1508     TCC_OPTION_traditional,
1509     TCC_OPTION_Wl,
1510     TCC_OPTION_W,
1511     TCC_OPTION_O,
1512     TCC_OPTION_mms_bitfields,
1513     TCC_OPTION_m,
1514     TCC_OPTION_f,
1515     TCC_OPTION_isystem,
1516     TCC_OPTION_iwithprefix,
1517     TCC_OPTION_nostdinc,
1518     TCC_OPTION_nostdlib,
1519     TCC_OPTION_print_search_dirs,
1520     TCC_OPTION_rdynamic,
1521     TCC_OPTION_pedantic,
1522     TCC_OPTION_pthread,
1523     TCC_OPTION_run,
1524     TCC_OPTION_v,
1525     TCC_OPTION_w,
1526     TCC_OPTION_pipe,
1527     TCC_OPTION_E,
1528     TCC_OPTION_MD,
1529     TCC_OPTION_MF,
1530     TCC_OPTION_x
1531 };
1532
1533 #define TCC_OPTION_HAS_ARG 0x0001
1534 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1535
1536 static const TCCOption tcc_options[] = {
1537     { "h", TCC_OPTION_HELP, 0 },
1538     { "-help", TCC_OPTION_HELP, 0 },
1539     { "?", TCC_OPTION_HELP, 0 },
1540     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1541     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1542     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1543     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1544     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1545     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1546     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1547     { "bench", TCC_OPTION_bench, 0 },
1548 #ifdef CONFIG_TCC_BACKTRACE
1549     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1550 #endif
1551 #ifdef CONFIG_TCC_BCHECK
1552     { "b", TCC_OPTION_b, 0 },
1553 #endif
1554     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1555     { "c", TCC_OPTION_c, 0 },
1556     { "dumpversion", TCC_OPTION_dumpversion, 0},
1557     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1558 #ifdef TCC_TARGET_ARM
1559     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1560 #endif
1561     { "static", TCC_OPTION_static, 0 },
1562     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1563     { "shared", TCC_OPTION_shared, 0 },
1564     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1565     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1566     { "pedantic", TCC_OPTION_pedantic, 0},
1567     { "pthread", TCC_OPTION_pthread, 0},
1568     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1569     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1570     { "r", TCC_OPTION_r, 0 },
1571     { "s", TCC_OPTION_s, 0 },
1572     { "traditional", TCC_OPTION_traditional, 0 },
1573     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1574     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1575     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1576     { "mms-bitfields", TCC_OPTION_mms_bitfields, 0}, /* must go before option 'm' */
1577     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1578     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1579     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1580     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
1581     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1582     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1583     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1584     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1585     { "w", TCC_OPTION_w, 0 },
1586     { "pipe", TCC_OPTION_pipe, 0},
1587     { "E", TCC_OPTION_E, 0},
1588     { "MD", TCC_OPTION_MD, 0},
1589     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1590     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1591     { NULL, 0, 0 },
1592 };
1593
1594 static void parse_option_D(TCCState *s1, const char *optarg)
1595 {
1596     char *sym = tcc_strdup(optarg);
1597     char *value = strchr(sym, '=');
1598     if (value)
1599         *value++ = '\0';
1600     tcc_define_symbol(s1, sym, value);
1601     tcc_free(sym);
1602 }
1603
1604 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1605 {
1606     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1607     f->type = filetype;
1608     strcpy(f->name, filename);
1609     dynarray_add((void ***)&s->files, &s->nb_files, f);
1610 }
1611
1612 /* read list file */
1613 static void args_parser_listfile(TCCState *s, const char *filename)
1614 {
1615     int fd;
1616     size_t len;
1617     char *p;
1618
1619     fd = open(filename, O_RDONLY | O_BINARY);
1620     if (fd < 0)
1621         tcc_error("file '%s' not found", filename);
1622
1623     len = lseek(fd, 0, SEEK_END);
1624     p = tcc_malloc(len + 1), p[len] = 0;
1625     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1626     tcc_set_options(s, p);
1627     tcc_free(p);
1628 }
1629
1630 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1631 {
1632     const TCCOption *popt;
1633     const char *optarg, *r;
1634     int optind = 0;
1635     int run = 0;
1636     int x;
1637     CString linker_arg; /* collect -Wl options */
1638     char buf[1024];
1639
1640     cstr_new(&linker_arg);
1641
1642     while (optind < argc) {
1643
1644         r = argv[optind++];
1645
1646         if (r[0] == '@' && r[1] != '\0') {
1647             args_parser_listfile(s, r + 1);
1648             continue;
1649         }
1650
1651         if (r[0] != '-' || r[1] == '\0') {
1652             args_parser_add_file(s, r, s->filetype);
1653             if (run) {
1654                 optind--;
1655                 /* argv[0] will be this file */
1656                 break;
1657             }
1658             continue;
1659         }
1660
1661         /* find option in table */
1662         for(popt = tcc_options; ; ++popt) {
1663             const char *p1 = popt->name;
1664             const char *r1 = r + 1;
1665             if (p1 == NULL)
1666                 tcc_error("invalid option -- '%s'", r);
1667             if (!strstart(p1, &r1))
1668                 continue;
1669             optarg = r1;
1670             if (popt->flags & TCC_OPTION_HAS_ARG) {
1671                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1672                     if (optind >= argc)
1673                 arg_err:
1674                         tcc_error("argument to '%s' is missing", r);
1675                     optarg = argv[optind++];
1676                 }
1677             } else if (*r1 != '\0')
1678                 continue;
1679             break;
1680         }
1681
1682         switch(popt->index) {
1683         case TCC_OPTION_HELP:
1684             return 0;
1685         case TCC_OPTION_I:
1686             tcc_add_include_path(s, optarg);
1687             break;
1688         case TCC_OPTION_D:
1689             parse_option_D(s, optarg);
1690             break;
1691         case TCC_OPTION_U:
1692             tcc_undefine_symbol(s, optarg);
1693             break;
1694         case TCC_OPTION_L:
1695             tcc_add_library_path(s, optarg);
1696             break;
1697         case TCC_OPTION_B:
1698             /* set tcc utilities path (mainly for tcc development) */
1699             tcc_set_lib_path(s, optarg);
1700             break;
1701         case TCC_OPTION_l:
1702             args_parser_add_file(s, optarg, AFF_TYPE_LIBWH - s->alacarte_link);
1703             s->nb_libraries++;
1704             break;
1705         case TCC_OPTION_pthread:
1706             parse_option_D(s, "_REENTRANT");
1707             s->option_pthread = 1;
1708             break;
1709         case TCC_OPTION_bench:
1710             s->do_bench = 1;
1711             break;
1712 #ifdef CONFIG_TCC_BACKTRACE
1713         case TCC_OPTION_bt:
1714             tcc_set_num_callers(atoi(optarg));
1715             break;
1716 #endif
1717 #ifdef CONFIG_TCC_BCHECK
1718         case TCC_OPTION_b:
1719             s->do_bounds_check = 1;
1720             s->do_debug = 1;
1721             break;
1722 #endif
1723         case TCC_OPTION_g:
1724             s->do_debug = 1;
1725             break;
1726         case TCC_OPTION_c:
1727             x = TCC_OUTPUT_OBJ;
1728         set_output_type:
1729             if (s->output_type)
1730                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
1731             s->output_type = x;
1732             break;
1733         case TCC_OPTION_d:
1734             if (*optarg == 'D')
1735                 s->dflag = 3;
1736             else if (*optarg == 'M')
1737                 s->dflag = 7;
1738             else
1739                 goto unsupported_option;
1740             break;
1741 #ifdef TCC_TARGET_ARM
1742         case TCC_OPTION_float_abi:
1743             /* tcc doesn't support soft float yet */
1744             if (!strcmp(optarg, "softfp")) {
1745                 s->float_abi = ARM_SOFTFP_FLOAT;
1746                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1747             } else if (!strcmp(optarg, "hard"))
1748                 s->float_abi = ARM_HARD_FLOAT;
1749             else
1750                 tcc_error("unsupported float abi '%s'", optarg);
1751             break;
1752 #endif
1753         case TCC_OPTION_static:
1754             s->static_link = 1;
1755             break;
1756         case TCC_OPTION_std:
1757             /* silently ignore, a current purpose:
1758                allow to use a tcc as a reference compiler for "make test" */
1759             break;
1760         case TCC_OPTION_shared:
1761             x = TCC_OUTPUT_DLL;
1762             goto set_output_type;
1763         case TCC_OPTION_soname:
1764             s->soname = tcc_strdup(optarg);
1765             break;
1766         case TCC_OPTION_m:
1767             s->option_m = tcc_strdup(optarg);
1768             break;
1769         case TCC_OPTION_o:
1770             if (s->outfile) {
1771                 tcc_warning("multiple -o option");
1772                 tcc_free(s->outfile);
1773             }
1774             s->outfile = tcc_strdup(optarg);
1775             break;
1776         case TCC_OPTION_r:
1777             /* generate a .o merging several output files */
1778             s->option_r = 1;
1779             x = TCC_OUTPUT_OBJ;
1780             goto set_output_type;
1781         case TCC_OPTION_isystem:
1782             tcc_add_sysinclude_path(s, optarg);
1783             break;
1784         case TCC_OPTION_iwithprefix:
1785             snprintf(buf, sizeof buf, "{B}/%s", optarg);
1786             tcc_add_sysinclude_path(s, buf);
1787             break;
1788         case TCC_OPTION_nostdinc:
1789             s->nostdinc = 1;
1790             break;
1791         case TCC_OPTION_nostdlib:
1792             s->nostdlib = 1;
1793             break;
1794         case TCC_OPTION_print_search_dirs:
1795             s->print_search_dirs = 1;
1796             break;
1797         case TCC_OPTION_run:
1798 #ifndef TCC_IS_NATIVE
1799             tcc_error("-run is not available in a cross compiler");
1800 #endif
1801             tcc_set_options(s, optarg);
1802             run = 1;
1803             x = TCC_OUTPUT_MEMORY;
1804             goto set_output_type;
1805         case TCC_OPTION_v:
1806             do ++s->verbose; while (*optarg++ == 'v');
1807             break;
1808         case TCC_OPTION_f:
1809             if (tcc_set_flag(s, optarg, 1) < 0)
1810                 goto unsupported_option;
1811             break;
1812         case TCC_OPTION_W:
1813             if (tcc_set_warning(s, optarg, 1) < 0)
1814                 goto unsupported_option;
1815             break;
1816         case TCC_OPTION_w:
1817             s->warn_none = 1;
1818             break;
1819         case TCC_OPTION_rdynamic:
1820             s->rdynamic = 1;
1821             break;
1822         case TCC_OPTION_Wl:
1823             if (linker_arg.size)
1824                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1825             cstr_cat(&linker_arg, optarg, 0);
1826             if (tcc_set_linker(s, linker_arg.data))
1827                 cstr_free(&linker_arg);
1828             break;
1829         case TCC_OPTION_E:
1830             x = TCC_OUTPUT_PREPROCESS;
1831             goto set_output_type;
1832         case TCC_OPTION_P:
1833             s->Pflag = atoi(optarg) + 1;
1834             break;
1835         case TCC_OPTION_MD:
1836             s->gen_deps = 1;
1837             break;
1838         case TCC_OPTION_MF:
1839             s->deps_outfile = tcc_strdup(optarg);
1840             break;
1841         case TCC_OPTION_dumpversion:
1842             printf ("%s\n", TCC_VERSION);
1843             exit(0);
1844             break;
1845         case TCC_OPTION_x:
1846             if (*optarg == 'c')
1847                 s->filetype = AFF_TYPE_C;
1848             else if (*optarg == 'a')
1849                 s->filetype = AFF_TYPE_ASMPP;
1850             else if (*optarg == 'n')
1851                 s->filetype = AFF_TYPE_NONE;
1852             else
1853                 tcc_warning("unsupported language '%s'", optarg);
1854             break;
1855         case TCC_OPTION_O:
1856             x = atoi(optarg);
1857             if (x > 0)
1858                 tcc_define_symbol(s, "__OPTIMIZE__", NULL);
1859             break;
1860         case TCC_OPTION_mms_bitfields:
1861             s->ms_bitfields = 1;
1862             break;
1863         case TCC_OPTION_traditional:
1864         case TCC_OPTION_pedantic:
1865         case TCC_OPTION_pipe:
1866         case TCC_OPTION_s:
1867             /* ignored */
1868             break;
1869         default:
1870 unsupported_option:
1871             if (s->warn_unsupported)
1872                 tcc_warning("unsupported option '%s'", r);
1873             break;
1874         }
1875     }
1876
1877     if (linker_arg.size) {
1878         r = linker_arg.data;
1879         goto arg_err;
1880     }
1881
1882     return optind;
1883 }
1884
1885 LIBTCCAPI int tcc_set_options(TCCState *s, const char *r)
1886 {
1887     char **argv;
1888     int argc;
1889     int ret, q, c;
1890     CString str;
1891
1892     argc = 0, argv = NULL;
1893     for(;;) {
1894         while (c = (unsigned char)*r, c && c <= ' ')
1895             ++r;
1896         if (c == 0)
1897             break;
1898         q = 0;
1899         cstr_new(&str);
1900         while (c = (unsigned char)*r, c) {
1901             ++r;
1902             if (c == '\\' && (*r == '"' || *r == '\\')) {
1903                 c = *r++;
1904             } else if (c == '"') {
1905                 q = !q;
1906                 continue;
1907             } else if (q == 0 && c <= ' ') {
1908                 break;
1909             }
1910             cstr_ccat(&str, c);
1911         }
1912         cstr_ccat(&str, 0);
1913         //printf("<%s>\n", str.data), fflush(stdout);
1914         dynarray_add((void ***)&argv, &argc, tcc_strdup(str.data));
1915         cstr_free(&str);
1916     }
1917     ret = tcc_parse_args(s, argc, argv);
1918     dynarray_reset(&argv, &argc);
1919     return ret;
1920 }
1921
1922 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time)
1923 {
1924     if (total_time < 1)
1925         total_time = 1;
1926     if (total_bytes < 1)
1927         total_bytes = 1;
1928     fprintf(stderr, "%d idents, %d lines, %d bytes, %0.3f s, %u lines/s, %0.1f MB/s\n",
1929            tok_ident - TOK_IDENT, total_lines, total_bytes,
1930            (double)total_time/1000,
1931            (unsigned)total_lines*1000/total_time,
1932            (double)total_bytes/1000/total_time);
1933 }
1934
1935 PUB_FUNC void tcc_set_environment(TCCState *s)
1936 {
1937     char * path;
1938
1939     path = getenv("C_INCLUDE_PATH");
1940     if(path != NULL) {
1941         tcc_add_include_path(s, path);
1942     }
1943     path = getenv("CPATH");
1944     if(path != NULL) {
1945         tcc_add_include_path(s, path);
1946     }
1947     path = getenv("LIBRARY_PATH");
1948     if(path != NULL) {
1949         tcc_add_library_path(s, path);
1950     }
1951 }