lib.c

   1 /*
   2  * 'sparse' library helper routines.
   3  *
   4  * Copyright (C) 2003 Transmeta Corp.
   5  *               2003-2004 Linus Torvalds
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  20  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25 #include <ctype.h>
  26 #include <fcntl.h>
  27 #include <stdarg.h>
  28 #include <stddef.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 #include <assert.h>
  34
  35 #include <sys/types.h>
  36
  37 #include "lib.h"
  38 #include "allocate.h"
  39 #include "token.h"
  40 #include "parse.h"
  41 #include "symbol.h"
  42 #include "expression.h"
  43 #include "scope.h"
  44 #include "linearize.h"
  45 #include "target.h"
  46 #include "version.h"
  47
  48 int verbose, optimize, optimize_size, preprocessing;
  49 int die_if_error = 0;
  50 int parse_error;
  51 int has_error = 0;
  52
  53 #ifndef __GNUC__
  54 # define __GNUC__ 2
  55 # define __GNUC_MINOR__ 95
  56 # define __GNUC_PATCHLEVEL__ 0
  57 #endif
  58
  59 int gcc_major = __GNUC__;
  60 int gcc_minor = __GNUC_MINOR__;
  61 int gcc_patchlevel = __GNUC_PATCHLEVEL__;
  62
  63 static const char *gcc_base_dir = GCC_BASE;
  64 static const char *multiarch_dir = MULTIARCH_TRIPLET;
  65
  66 struct token *skip_to(struct token *token, int op)
  67 {
  68         while (!match_op(token, op) && !eof_token(token))
  69                 token = token->next;
  70         return token;
  71 }
  72
  73 struct token *expect(struct token *token, int op, const char *where)
  74 {
  75         if (!match_op(token, op)) {
  76                 static struct token bad_token;
  77                 if (token != &bad_token) {
  78                         bad_token.next = token;
  79                         sparse_error(token->pos, "Expected %s %s", show_special(op), where);
  80                         sparse_error(token->pos, "got %s", show_token(token));
  81                 }
  82                 if (op == ';')
  83                         return skip_to(token, op);
  84                 return &bad_token;
  85         }
  86         return token->next;
  87 }
  88
  89 unsigned int hexval(unsigned int c)
  90 {
  91         int retval = 256;
  92         switch (c) {
  93         case '0'...'9':
  94                 retval = c - '0';
  95                 break;
  96         case 'a'...'f':
  97                 retval = c - 'a' + 10;
  98                 break;
  99         case 'A'...'F':
 100                 retval = c - 'A' + 10;
 101                 break;
 102         }
 103         return retval;
 104 }
 105
 106 static void do_warn(const char *type, struct position pos, const char * fmt, va_list args)
 107 {
 108         static char buffer[512];
 109         const char *name;
 110
 111         vsprintf(buffer, fmt, args);
 112         name = stream_name(pos.stream);
 113
 114         fprintf(stderr, "%s:%d:%d: %s%s\n",
 115                 name, pos.line, pos.pos, type, buffer);
 116 }
 117
 118 static int max_warnings = 100;
 119 static int show_info = 1;
 120
 121 void info(struct position pos, const char * fmt, ...)
 122 {
 123         va_list args;
 124
 125         if (!show_info)
 126                 return;
 127         va_start(args, fmt);
 128         do_warn("", pos, fmt, args);
 129         va_end(args);
 130 }
 131
 132 static void do_error(struct position pos, const char * fmt, va_list args)
 133 {
 134         static int errors = 0;
 135
 136         parse_error = 1;
 137         die_if_error = 1;
 138         show_info = 1;
 139         /* Shut up warnings after an error */
 140         has_error |= ERROR_CURR_PHASE;
 141         if (errors > 100) {
 142                 static int once = 0;
 143                 show_info = 0;
 144                 if (once)
 145                         return;
 146                 fmt = "too many errors";
 147                 once = 1;
 148         }
 149
 150         do_warn("error: ", pos, fmt, args);
 151         errors++;
 152 }
 153
 154 void warning(struct position pos, const char * fmt, ...)
 155 {
 156         va_list args;
 157
 158         if (Wsparse_error) {
 159                 va_start(args, fmt);
 160                 do_error(pos, fmt, args);
 161                 va_end(args);
 162                 return;
 163         }
 164
 165         if (!max_warnings || has_error) {
 166                 show_info = 0;
 167                 return;
 168         }
 169
 170         if (!--max_warnings) {
 171                 show_info = 0;
 172                 fmt = "too many warnings";
 173         }
 174
 175         va_start(args, fmt);
 176         do_warn("warning: ", pos, fmt, args);
 177         va_end(args);
 178 }
 179
 180 void sparse_error(struct position pos, const char * fmt, ...)
 181 {
 182         va_list args;
 183         va_start(args, fmt);
 184         do_error(pos, fmt, args);
 185         va_end(args);
 186 }
 187
 188 void expression_error(struct expression *expr, const char *fmt, ...)
 189 {
 190         va_list args;
 191         va_start(args, fmt);
 192         do_error(expr->pos, fmt, args);
 193         va_end(args);
 194         expr->ctype = &bad_ctype;
 195 }
 196
 197 NORETURN_ATTR
 198 void error_die(struct position pos, const char * fmt, ...)
 199 {
 200         va_list args;
 201         va_start(args, fmt);
 202         do_warn("error: ", pos, fmt, args);
 203         va_end(args);
 204         exit(1);
 205 }
 206
 207 NORETURN_ATTR
 208 void die(const char *fmt, ...)
 209 {
 210         va_list args;
 211         static char buffer[512];
 212
 213         va_start(args, fmt);
 214         vsnprintf(buffer, sizeof(buffer), fmt, args);
 215         va_end(args);
 216
 217         fprintf(stderr, "%s\n", buffer);
 218         exit(1);
 219 }
 220
 221 static struct token *pre_buffer_begin = NULL;
 222 static struct token *pre_buffer_end = NULL;
 223
 224 int Waddress = 0;
 225 int Waddress_space = 1;
 226 int Wbig_constants = 1;
 227 int Wbitwise = 1;
 228 int Wcast_to_as = 0;
 229 int Wcast_truncate = 1;
 230 int Wconstexpr_not_const = 0;
 231 int Wcontext = 1;
 232 int Wdecl = 1;
 233 int Wdeclarationafterstatement = -1;
 234 int Wdefault_bitfield_sign = 0;
 235 int Wdesignated_init = 1;
 236 int Wdo_while = 0;
 237 int Winit_cstring = 0;
 238 int Wenum_mismatch = 1;
 239 int Wempty_character_constant = 1;
 240 int Wsparse_error = 0;
 241 int Wmemcpy_max_count = 1;
 242 int Wnon_ansi_function_declaration = 1;
 243 int Wnon_pointer_null = 1;
 244 int Wold_initializer = 1;
 245 int Wone_bit_signed_bitfield = 1;
 246 int Woverride_init = 1;
 247 int Woverride_init_all = 0;
 248 int Woverride_init_whole_range = 0;
 249 int Wparen_string = 0;
 250 int Wpointer_arith = 0;
 251 int Wptr_subtraction_blows = 0;
 252 int Wreturn_void = 0;
 253 int Wshadow = 0;
 254 int Wsizeof_bool = 0;
 255 int Wtautological_compare = 0;
 256 int Wtransparent_union = 0;
 257 int Wtypesign = 0;
 258 int Wundef = 0;
 259 int Wuninitialized = 1;
 260 int Wunknown_attribute = 0;
 261 int Wvla = 1;
 262
 263 int dump_macro_defs = 0;
 264
 265 int dbg_entry = 0;
 266 int dbg_dead = 0;
 267
 268 int fmem_report = 0;
 269 int fdump_linearize;
 270 unsigned long long fmemcpy_max_count = 100000;
 271
 272 int preprocess_only;
 273
 274 static enum { STANDARD_C89,
 275               STANDARD_C94,
 276               STANDARD_C99,
 277               STANDARD_C11,
 278               STANDARD_GNU11,
 279               STANDARD_GNU89,
 280               STANDARD_GNU99, } standard = STANDARD_GNU89;
 281
 282 #define ARCH_LP32  0
 283 #define ARCH_LP64  1
 284 #define ARCH_LLP64 2
 285
 286 #ifdef __x86_64__
 287 #define ARCH_M64_DEFAULT ARCH_LP64
 288 #else
 289 #define ARCH_M64_DEFAULT ARCH_LP32
 290 #endif
 291
 292 int arch_m64 = ARCH_M64_DEFAULT;
 293 int arch_msize_long = 0;
 294
 295 #ifdef __BIG_ENDIAN__
 296 #define ARCH_BIG_ENDIAN 1
 297 #else
 298 #define ARCH_BIG_ENDIAN 0
 299 #endif
 300 int arch_big_endian = ARCH_BIG_ENDIAN;
 301
 302
 303 #define CMDLINE_INCLUDE 20
 304 static int cmdline_include_nr = 0;
 305 static char *cmdline_include[CMDLINE_INCLUDE];
 306
 307
 308 void add_pre_buffer(const char *fmt, ...)
 309 {
 310         va_list args;
 311         unsigned int size;
 312         struct token *begin, *end;
 313         char buffer[4096];
 314
 315         va_start(args, fmt);
 316         size = vsnprintf(buffer, sizeof(buffer), fmt, args);
 317         va_end(args);
 318         begin = tokenize_buffer(buffer, size, &end);
 319         if (!pre_buffer_begin)
 320                 pre_buffer_begin = begin;
 321         if (pre_buffer_end)
 322                 pre_buffer_end->next = begin;
 323         pre_buffer_end = end;
 324 }
 325
 326 static char **handle_switch_D(char *arg, char **next)
 327 {
 328         const char *name = arg + 1;
 329         const char *value = "1";
 330
 331         if (!*name) {
 332                 arg = *++next;
 333                 if (!arg)
 334                         die("argument to `-D' is missing");
 335                 name = arg;
 336         }
 337
 338         for (;;arg++) {
 339                 char c;
 340                 c = *arg;
 341                 if (!c)
 342                         break;
 343                 if (c == '=') {
 344                         *arg = '\0';
 345                         value = arg + 1;
 346                         break;
 347                 }
 348         }
 349         add_pre_buffer("#define %s %s\n", name, value);
 350         return next;
 351 }
 352
 353 static char **handle_switch_E(char *arg, char **next)
 354 {
 355         if (arg[1] == '\0')
 356                 preprocess_only = 1;
 357         return next;
 358 }
 359
 360 static char **handle_switch_I(char *arg, char **next)
 361 {
 362         char *path = arg+1;
 363
 364         switch (arg[1]) {
 365         case '-':
 366                 add_pre_buffer("#split_include\n");
 367                 break;
 368
 369         case '\0':      /* Plain "-I" */
 370                 path = *++next;
 371                 if (!path)
 372                         die("missing argument for -I option");
 373                 /* Fall through */
 374         default:
 375                 add_pre_buffer("#add_include \"%s/\"\n", path);
 376         }
 377         return next;
 378 }
 379
 380 static void add_cmdline_include(char *filename)
 381 {
 382         if (cmdline_include_nr >= CMDLINE_INCLUDE)
 383                 die("too many include files for %s\n", filename);
 384         cmdline_include[cmdline_include_nr++] = filename;
 385 }
 386
 387 static char **handle_switch_i(char *arg, char **next)
 388 {
 389         if (*next && !strcmp(arg, "include"))
 390                 add_cmdline_include(*++next);
 391         else if (*next && !strcmp(arg, "imacros"))
 392                 add_cmdline_include(*++next);
 393         else if (*next && !strcmp(arg, "isystem")) {
 394                 char *path = *++next;
 395                 if (!path)
 396                         die("missing argument for -isystem option");
 397                 add_pre_buffer("#add_isystem \"%s/\"\n", path);
 398         } else if (*next && !strcmp(arg, "idirafter")) {
 399                 char *path = *++next;
 400                 if (!path)
 401                         die("missing argument for -idirafter option");
 402                 add_pre_buffer("#add_dirafter \"%s/\"\n", path);
 403         }
 404         return next;
 405 }
 406
 407 static char **handle_switch_M(char *arg, char **next)
 408 {
 409         if (!strcmp(arg, "MF") || !strcmp(arg,"MQ") || !strcmp(arg,"MT")) {
 410                 if (!*next)
 411                         die("missing argument for -%s option", arg);
 412                 return next + 1;
 413         }
 414         return next;
 415 }
 416
 417 static char **handle_multiarch_dir(char *arg, char **next)
 418 {
 419         multiarch_dir = *++next;
 420         if (!multiarch_dir)
 421                 die("missing argument for -multiarch-dir option");
 422         return next;
 423 }
 424
 425 static char **handle_switch_m(char *arg, char **next)
 426 {
 427         if (!strcmp(arg, "m64")) {
 428                 arch_m64 = ARCH_LP64;
 429         } else if (!strcmp(arg, "m32")) {
 430                 arch_m64 = ARCH_LP32;
 431         } else if (!strcmp(arg, "msize-llp64")) {
 432                 arch_m64 = ARCH_LLP64;
 433         } else if (!strcmp(arg, "msize-long")) {
 434                 arch_msize_long = 1;
 435         } else if (!strcmp(arg, "multiarch-dir")) {
 436                 return handle_multiarch_dir(arg, next);
 437         } else if (!strcmp(arg, "mbig-endian")) {
 438                 arch_big_endian = 1;
 439         } else if (!strcmp(arg, "mlittle-endian")) {
 440                 arch_big_endian = 0;
 441         }
 442         return next;
 443 }
 444
 445 static void handle_arch_m64_finalize(void)
 446 {
 447         switch (arch_m64) {
 448         case ARCH_LP32:
 449                 /* default values */
 450 #if defined(__x86_64__) || defined (__i386)
 451                 add_pre_buffer("#weak_define __i386__ 1\n");
 452                 add_pre_buffer("#weak_define __i386 1\n");
 453 #endif
 454                 return;
 455         case ARCH_LP64:
 456                 bits_in_long = 64;
 457                 max_int_alignment = 8;
 458                 size_t_ctype = &ulong_ctype;
 459                 ssize_t_ctype = &long_ctype;
 460                 add_pre_buffer("#weak_define __LP64__ 1\n");
 461                 add_pre_buffer("#weak_define _LP64 1\n");
 462                 goto case_64bit_common;
 463         case ARCH_LLP64:
 464                 bits_in_long = 32;
 465                 max_int_alignment = 4;
 466                 size_t_ctype = &ullong_ctype;
 467                 ssize_t_ctype = &llong_ctype;
 468                 add_pre_buffer("#weak_define __LLP64__ 1\n");
 469                 goto case_64bit_common;
 470         case_64bit_common:
 471                 bits_in_pointer = 64;
 472                 pointer_alignment = 8;
 473 #if defined(__x86_64__) || defined (__i386)
 474                 add_pre_buffer("#weak_define __x86_64__ 1\n");
 475                 add_pre_buffer("#weak_define __x86_64 1\n");
 476 #endif
 477                 break;
 478         }
 479 }
 480
 481 static void handle_arch_msize_long_finalize(void)
 482 {
 483         if (arch_msize_long) {
 484                 size_t_ctype = &ulong_ctype;
 485                 ssize_t_ctype = &long_ctype;
 486         }
 487 }
 488
 489 static void handle_arch_finalize(void)
 490 {
 491         handle_arch_m64_finalize();
 492         handle_arch_msize_long_finalize();
 493 }
 494
 495
 496 static int handle_simple_switch(const char *arg, const char *name, int *flag)
 497 {
 498         int val = 1;
 499
 500         // Prefixe "no-" mean to turn flag off.
 501         if (strncmp(arg, "no-", 3) == 0) {
 502                 arg += 3;
 503                 val = 0;
 504         }
 505
 506         if (strcmp(arg, name) == 0) {
 507                 *flag = val;
 508                 return 1;
 509         }
 510
 511         // not handled
 512         return 0;
 513 }
 514
 515 static char **handle_switch_o(char *arg, char **next)
 516 {
 517         if (!strcmp (arg, "o")) {       // "-o foo"
 518                 if (!*++next)
 519                         die("argument to '-o' is missing");
 520         }
 521         // else "-ofoo"
 522
 523         return next;
 524 }
 525
 526 static const struct warning {
 527         const char *name;
 528         int *flag;
 529 } warnings[] = {
 530         { "address", &Waddress },
 531         { "address-space", &Waddress_space },
 532         { "big-constants", &Wbig_constants },
 533         { "bitwise", &Wbitwise },
 534         { "cast-to-as", &Wcast_to_as },
 535         { "cast-truncate", &Wcast_truncate },
 536         { "constexpr-not-const", &Wconstexpr_not_const},
 537         { "context", &Wcontext },
 538         { "decl", &Wdecl },
 539         { "declaration-after-statement", &Wdeclarationafterstatement },
 540         { "default-bitfield-sign", &Wdefault_bitfield_sign },
 541         { "designated-init", &Wdesignated_init },
 542         { "do-while", &Wdo_while },
 543         { "empty-character-constant", &Wempty_character_constant },
 544         { "enum-mismatch", &Wenum_mismatch },
 545         { "init-cstring", &Winit_cstring },
 546         { "memcpy-max-count", &Wmemcpy_max_count },
 547         { "non-ansi-function-declaration", &Wnon_ansi_function_declaration },
 548         { "non-pointer-null", &Wnon_pointer_null },
 549         { "old-initializer", &Wold_initializer },
 550         { "one-bit-signed-bitfield", &Wone_bit_signed_bitfield },
 551         { "override-init", &Woverride_init },
 552         { "override-init-all", &Woverride_init_all },
 553         { "paren-string", &Wparen_string },
 554         { "ptr-subtraction-blows", &Wptr_subtraction_blows },
 555         { "return-void", &Wreturn_void },
 556         { "shadow", &Wshadow },
 557         { "sizeof-bool", &Wsizeof_bool },
 558         { "pointer-arith", &Wpointer_arith },
 559         { "sparse-error", &Wsparse_error },
 560         { "tautological-compare", &Wtautological_compare },
 561         { "transparent-union", &Wtransparent_union },
 562         { "typesign", &Wtypesign },
 563         { "undef", &Wundef },
 564         { "uninitialized", &Wuninitialized },
 565         { "unknown-attribute", &Wunknown_attribute },
 566         { "vla", &Wvla },
 567 };
 568
 569 enum {
 570         WARNING_OFF,
 571         WARNING_ON,
 572         WARNING_FORCE_OFF
 573 };
 574
 575
 576 static char **handle_onoff_switch(char *arg, char **next, const struct warning warnings[], int n)
 577 {
 578         int flag = WARNING_ON;
 579         char *p = arg + 1;
 580         unsigned i;
 581
 582         if (!strcmp(p, "sparse-all")) {
 583                 for (i = 0; i < n; i++) {
 584                         if (*warnings[i].flag != WARNING_FORCE_OFF && warnings[i].flag != &Wsparse_error)
 585                                 *warnings[i].flag = WARNING_ON;
 586                 }
 587         }
 588
 589         // Prefixes "no" and "no-" mean to turn warning off.
 590         if (p[0] == 'n' && p[1] == 'o') {
 591                 p += 2;
 592                 if (p[0] == '-')
 593                         p++;
 594                 flag = WARNING_FORCE_OFF;
 595         }
 596
 597         for (i = 0; i < n; i++) {
 598                 if (!strcmp(p,warnings[i].name)) {
 599                         *warnings[i].flag = flag;
 600                         return next;
 601                 }
 602         }
 603
 604         // Unknown.
 605         return NULL;
 606 }
 607
 608 static char **handle_switch_W(char *arg, char **next)
 609 {
 610         char ** ret = handle_onoff_switch(arg, next, warnings, ARRAY_SIZE(warnings));
 611         if (ret)
 612                 return ret;
 613
 614         // Unknown.
 615         return next;
 616 }
 617
 618 static struct warning debugs[] = {
 619         { "entry", &dbg_entry},
 620         { "dead", &dbg_dead},
 621 };
 622
 623
 624 static char **handle_switch_v(char *arg, char **next)
 625 {
 626         char ** ret = handle_onoff_switch(arg, next, debugs, ARRAY_SIZE(debugs));
 627         if (ret)
 628                 return ret;
 629
 630         // Unknown.
 631         do {
 632                 verbose++;
 633         } while (*++arg == 'v');
 634         return next;
 635 }
 636
 637 static struct warning dumps[] = {
 638         { "D", &dump_macro_defs},
 639 };
 640
 641 static char **handle_switch_d(char *arg, char **next)
 642 {
 643         char ** ret = handle_onoff_switch(arg, next, dumps, ARRAY_SIZE(dumps));
 644         if (ret)
 645                 return ret;
 646
 647         return next;
 648 }
 649
 650
 651 static void handle_onoff_switch_finalize(const struct warning warnings[], int n)
 652 {
 653         unsigned i;
 654
 655         for (i = 0; i < n; i++) {
 656                 if (*warnings[i].flag == WARNING_FORCE_OFF)
 657                         *warnings[i].flag = WARNING_OFF;
 658         }
 659 }
 660
 661 static void handle_switch_W_finalize(void)
 662 {
 663         handle_onoff_switch_finalize(warnings, ARRAY_SIZE(warnings));
 664
 665         /* default Wdeclarationafterstatement based on the C dialect */
 666         if (-1 == Wdeclarationafterstatement)
 667         {
 668                 switch (standard)
 669                 {
 670                         case STANDARD_C89:
 671                         case STANDARD_C94:
 672                                 Wdeclarationafterstatement = 1;
 673                                 break;
 674
 675                         case STANDARD_C99:
 676                         case STANDARD_GNU89:
 677                         case STANDARD_GNU99:
 678                         case STANDARD_C11:
 679                         case STANDARD_GNU11:
 680                                 Wdeclarationafterstatement = 0;
 681                                 break;
 682
 683                         default:
 684                                 assert (0);
 685                 }
 686
 687         }
 688 }
 689
 690 static void handle_switch_v_finalize(void)
 691 {
 692         handle_onoff_switch_finalize(debugs, ARRAY_SIZE(debugs));
 693 }
 694
 695 static char **handle_switch_U(char *arg, char **next)
 696 {
 697         const char *name = arg + 1;
 698         if (*name == '\0')
 699                 name = *++next;
 700         add_pre_buffer ("#undef %s\n", name);
 701         return next;
 702 }
 703
 704 static char **handle_switch_O(char *arg, char **next)
 705 {
 706         int level = 1;
 707         if (arg[1] >= '0' && arg[1] <= '9')
 708                 level = arg[1] - '0';
 709         optimize = level;
 710         optimize_size = arg[1] == 's';
 711         return next;
 712 }
 713
 714 static char **handle_switch_fmemcpy_max_count(char *arg, char **next)
 715 {
 716         unsigned long long val;
 717         char *end;
 718
 719         val = strtoull(arg, &end, 0);
 720         if (*end != '\0' || end == arg)
 721                 die("error: missing argument to \"-fmemcpy-max-count=\"");
 722
 723         if (val == 0)
 724                 val = ~0ULL;
 725         fmemcpy_max_count = val;
 726         return next;
 727 }
 728
 729 static char **handle_switch_ftabstop(char *arg, char **next)
 730 {
 731         char *end;
 732         unsigned long val;
 733
 734         if (*arg == '\0')
 735                 die("error: missing argument to \"-ftabstop=\"");
 736
 737         /* we silently ignore silly values */
 738         val = strtoul(arg, &end, 10);
 739         if (*end == '\0' && 1 <= val && val <= 100)
 740                 tabstop = val;
 741
 742         return next;
 743 }
 744
 745 static int funsigned_char;
 746 static void handle_funsigned_char(void)
 747 {
 748         if (funsigned_char) {
 749                 char_ctype.ctype.modifiers &= ~MOD_SIGNED;
 750                 char_ctype.ctype.modifiers |= MOD_UNSIGNED;
 751         }
 752 }
 753
 754         static char **handle_switch_fdump(char *arg, char **next)
 755 {
 756         if (!strncmp(arg, "linearize", 9)) {
 757                 arg += 9;
 758                 if (*arg == '\0')
 759                         fdump_linearize = 1;
 760                 else if (!strcmp(arg, "=only"))
 761                         fdump_linearize = 2;
 762                 else
 763                         goto err;
 764         }
 765
 766         /* ignore others flags */
 767         return next;
 768
 769 err:
 770         die("error: unknown flag \"-fdump-%s\"", arg);
 771 }
 772
 773 static char **handle_switch_f(char *arg, char **next)
 774 {
 775         arg++;
 776
 777         if (!strncmp(arg, "tabstop=", 8))
 778                 return handle_switch_ftabstop(arg+8, next);
 779         if (!strncmp(arg, "dump-", 5))
 780                 return handle_switch_fdump(arg+5, next);
 781         if (!strncmp(arg, "memcpy-max-count=", 17))
 782                 return handle_switch_fmemcpy_max_count(arg+17, next);
 783
 784         if (!strcmp(arg, "unsigned-char")) {
 785                 funsigned_char = 1;
 786                 return next;
 787         }
 788
 789         /* handle switches w/ arguments above, boolean and only boolean below */
 790         if (handle_simple_switch(arg, "mem-report", &fmem_report))
 791                 return next;
 792
 793         return next;
 794 }
 795
 796 static char **handle_switch_G(char *arg, char **next)
 797 {
 798         if (!strcmp (arg, "G") && *next)
 799                 return next + 1; // "-G 0"
 800         else
 801                 return next;     // "-G0" or (bogus) terminal "-G"
 802 }
 803
 804 static char **handle_switch_a(char *arg, char **next)
 805 {
 806         if (!strcmp (arg, "ansi"))
 807                 standard = STANDARD_C89;
 808
 809         return next;
 810 }
 811
 812 static char **handle_switch_s(char *arg, char **next)
 813 {
 814         if (!strncmp (arg, "std=", 4))
 815         {
 816                 arg += 4;
 817
 818                 if (!strcmp (arg, "c89") ||
 819                     !strcmp (arg, "iso9899:1990"))
 820                         standard = STANDARD_C89;
 821
 822                 else if (!strcmp (arg, "iso9899:199409"))
 823                         standard = STANDARD_C94;
 824
 825                 else if (!strcmp (arg, "c99") ||
 826                          !strcmp (arg, "c9x") ||
 827                          !strcmp (arg, "iso9899:1999") ||
 828                          !strcmp (arg, "iso9899:199x"))
 829                         standard = STANDARD_C99;
 830
 831                 else if (!strcmp (arg, "gnu89"))
 832                         standard = STANDARD_GNU89;
 833
 834                 else if (!strcmp (arg, "gnu99") || !strcmp (arg, "gnu9x"))
 835                         standard = STANDARD_GNU99;
 836
 837                 else if (!strcmp(arg, "c11") ||
 838                          !strcmp(arg, "c1x") ||
 839                          !strcmp(arg, "iso9899:2011"))
 840                         standard = STANDARD_C11;
 841
 842                 else if (!strcmp(arg, "gnu11"))
 843                         standard = STANDARD_GNU11;
 844
 845                 else
 846                         die ("Unsupported C dialect");
 847         }
 848
 849         return next;
 850 }
 851
 852 static char **handle_nostdinc(char *arg, char **next)
 853 {
 854         add_pre_buffer("#nostdinc\n");
 855         return next;
 856 }
 857
 858 static char **handle_switch_n(char *arg, char **next)
 859 {
 860         if (!strcmp (arg, "nostdinc"))
 861                 return handle_nostdinc(arg, next);
 862
 863         return next;
 864 }
 865
 866 static char **handle_base_dir(char *arg, char **next)
 867 {
 868         gcc_base_dir = *++next;
 869         if (!gcc_base_dir)
 870                 die("missing argument for -gcc-base-dir option");
 871         return next;
 872 }
 873
 874 static char **handle_no_lineno(char *arg, char **next)
 875 {
 876         no_lineno = 1;
 877         return next;
 878 }
 879
 880 static char **handle_switch_g(char *arg, char **next)
 881 {
 882         if (!strcmp (arg, "gcc-base-dir"))
 883                 return handle_base_dir(arg, next);
 884
 885         return next;
 886 }
 887
 888 static char **handle_version(char *arg, char **next)
 889 {
 890         printf("%s\n", SPARSE_VERSION);
 891         exit(0);
 892 }
 893
 894 static char **handle_param(char *arg, char **next)
 895 {
 896         char *value = NULL;
 897
 898         /* For now just skip any '--param=*' or '--param *' */
 899         if (*arg == '\0') {
 900                 value = *++next;
 901         } else if (isspace((unsigned char)*arg) || *arg == '=') {
 902                 value = ++arg;
 903         }
 904
 905         if (!value)
 906                 die("missing argument for --param option");
 907
 908         return next;
 909 }
 910
 911 struct switches {
 912         const char *name;
 913         char **(*fn)(char *, char **);
 914         unsigned int prefix:1;
 915 };
 916
 917 static char **handle_long_options(char *arg, char **next)
 918 {
 919         static struct switches cmd[] = {
 920                 { "param", handle_param, 1 },
 921                 { "version", handle_version },
 922                 { "nostdinc", handle_nostdinc },
 923                 { "gcc-base-dir", handle_base_dir},
 924                 { "no-lineno", handle_no_lineno},
 925                 { NULL, NULL }
 926         };
 927         struct switches *s = cmd;
 928
 929         while (s->name) {
 930                 int optlen = strlen(s->name);
 931                 if (!strncmp(s->name, arg, optlen + !s->prefix))
 932                         return s->fn(arg + optlen, next);
 933                 s++;
 934         }
 935         return next;
 936 }
 937
 938 static char **handle_switch(char *arg, char **next)
 939 {
 940         switch (*arg) {
 941         case 'a': return handle_switch_a(arg, next);
 942         case 'D': return handle_switch_D(arg, next);
 943         case 'd': return handle_switch_d(arg, next);
 944         case 'E': return handle_switch_E(arg, next);
 945         case 'f': return handle_switch_f(arg, next);
 946         case 'g': return handle_switch_g(arg, next);
 947         case 'G': return handle_switch_G(arg, next);
 948         case 'I': return handle_switch_I(arg, next);
 949         case 'i': return handle_switch_i(arg, next);
 950         case 'M': return handle_switch_M(arg, next);
 951         case 'm': return handle_switch_m(arg, next);
 952         case 'n': return handle_switch_n(arg, next);
 953         case 'o': return handle_switch_o(arg, next);
 954         case 'O': return handle_switch_O(arg, next);
 955         case 's': return handle_switch_s(arg, next);
 956         case 'U': return handle_switch_U(arg, next);
 957         case 'v': return handle_switch_v(arg, next);
 958         case 'W': return handle_switch_W(arg, next);
 959         case '-': return handle_long_options(arg + 1, next);
 960         default:
 961                 break;
 962         }
 963
 964         /*
 965          * Ignore unknown command line options:
 966          * they're probably gcc switches
 967          */
 968         return next;
 969 }
 970
 971 static void predefined_sizeof(const char *name, unsigned bits)
 972 {
 973         add_pre_buffer("#weak_define __SIZEOF_%s__ %d\n", name, bits/8);
 974 }
 975
 976 static void predefined_max(const char *name, const char *suffix, unsigned bits)
 977 {
 978         unsigned long long max = (1ULL << (bits - 1 )) - 1;
 979
 980         add_pre_buffer("#weak_define __%s_MAX__ %#llx%s\n", name, max, suffix);
 981 }
 982
 983 static void predefined_type_size(const char *name, const char *suffix, unsigned bits)
 984 {
 985         predefined_max(name, suffix, bits);
 986         predefined_sizeof(name, bits);
 987 }
 988
 989 static void predefined_macros(void)
 990 {
 991         add_pre_buffer("#define __CHECKER__ 1\n");
 992
 993         predefined_sizeof("SHORT", bits_in_short);
 994         predefined_max("SHRT", "", bits_in_short);
 995         predefined_max("SCHAR", "", bits_in_char);
 996         predefined_max("WCHAR", "", bits_in_wchar);
 997         add_pre_buffer("#weak_define __CHAR_BIT__ %d\n", bits_in_char);
 998
 999         predefined_type_size("INT", "", bits_in_int);
1000         predefined_type_size("LONG", "L", bits_in_long);
1001         predefined_type_size("LONG_LONG", "LL", bits_in_longlong);
1002
1003         predefined_sizeof("INT128", 128);
1004
1005         predefined_sizeof("SIZE_T", bits_in_pointer);
1006         predefined_sizeof("PTRDIFF_T", bits_in_pointer);
1007         predefined_sizeof("POINTER", bits_in_pointer);
1008
1009         predefined_sizeof("FLOAT", bits_in_float);
1010         predefined_sizeof("DOUBLE", bits_in_double);
1011         predefined_sizeof("LONG_DOUBLE", bits_in_longdouble);
1012
1013         add_pre_buffer("#weak_define __%s_ENDIAN__ 1\n",
1014                 arch_big_endian ? "BIG" : "LITTLE");
1015
1016         add_pre_buffer("#weak_define __ORDER_LITTLE_ENDIAN__ 1234\n");
1017         add_pre_buffer("#weak_define __ORDER_BIG_ENDIAN__ 4321\n");
1018         add_pre_buffer("#weak_define __ORDER_PDP_ENDIAN__ 3412\n");
1019         add_pre_buffer("#weak_define __BYTE_ORDER__ __ORDER_%s_ENDIAN__\n",
1020                 arch_big_endian ? "BIG" : "LITTLE");
1021 }
1022
1023 void declare_builtin_functions(void)
1024 {
1025         /* Gaah. gcc knows tons of builtin <string.h> functions */
1026         add_pre_buffer("extern void *__builtin_memchr(const void *, int, __SIZE_TYPE__);\n");
1027         add_pre_buffer("extern void *__builtin_memcpy(void *, const void *, __SIZE_TYPE__);\n");
1028         add_pre_buffer("extern void *__builtin_mempcpy(void *, const void *, __SIZE_TYPE__);\n");
1029         add_pre_buffer("extern void *__builtin_memmove(void *, const void *, __SIZE_TYPE__);\n");
1030         add_pre_buffer("extern void *__builtin_memset(void *, int, __SIZE_TYPE__);\n");
1031         add_pre_buffer("extern int __builtin_memcmp(const void *, const void *, __SIZE_TYPE__);\n");
1032         add_pre_buffer("extern char *__builtin_strcat(char *, const char *);\n");
1033         add_pre_buffer("extern char *__builtin_strncat(char *, const char *, __SIZE_TYPE__);\n");
1034         add_pre_buffer("extern int __builtin_strcmp(const char *, const char *);\n");
1035         add_pre_buffer("extern int __builtin_strncmp(const char *, const char *, __SIZE_TYPE__);\n");
1036         add_pre_buffer("extern int __builtin_strcasecmp(const char *, const char *);\n");
1037         add_pre_buffer("extern int __builtin_strncasecmp(const char *, const char *, __SIZE_TYPE__);\n");
1038         add_pre_buffer("extern char *__builtin_strchr(const char *, int);\n");
1039         add_pre_buffer("extern char *__builtin_strrchr(const char *, int);\n");
1040         add_pre_buffer("extern char *__builtin_strcpy(char *, const char *);\n");
1041         add_pre_buffer("extern char *__builtin_strncpy(char *, const char *, __SIZE_TYPE__);\n");
1042         add_pre_buffer("extern char *__builtin_strdup(const char *);\n");
1043         add_pre_buffer("extern char *__builtin_strndup(const char *, __SIZE_TYPE__);\n");
1044         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strspn(const char *, const char *);\n");
1045         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strcspn(const char *, const char *);\n");
1046         add_pre_buffer("extern char * __builtin_strpbrk(const char *, const char *);\n");
1047         add_pre_buffer("extern char* __builtin_stpcpy(const char *, const char*);\n");
1048         add_pre_buffer("extern char* __builtin_stpncpy(const char *, const char*, __SIZE_TYPE__);\n");
1049         add_pre_buffer("extern __SIZE_TYPE__ __builtin_strlen(const char *);\n");
1050         add_pre_buffer("extern char *__builtin_strstr(const char *, const char *);\n");
1051         add_pre_buffer("extern char *__builtin_strcasestr(const char *, const char *);\n");
1052         add_pre_buffer("extern char *__builtin_strnstr(const char *, const char *, __SIZE_TYPE__);\n");
1053
1054         /* And even some from <strings.h> */
1055         add_pre_buffer("extern int  __builtin_bcmp(const void *, const void *, __SIZE_TYPE__);\n");
1056         add_pre_buffer("extern void __builtin_bcopy(const void *, void *, __SIZE_TYPE__);\n");
1057         add_pre_buffer("extern void __builtin_bzero(void *, __SIZE_TYPE__);\n");
1058         add_pre_buffer("extern char*__builtin_index(const char *, int);\n");
1059         add_pre_buffer("extern char*__builtin_rindex(const char *, int);\n");
1060
1061         /* And bitwise operations.. */
1062         add_pre_buffer("extern int __builtin_clrsb(int);\n");
1063         add_pre_buffer("extern int __builtin_clrsbl(long);\n");
1064         add_pre_buffer("extern int __builtin_clrsbll(long long);\n");
1065         add_pre_buffer("extern int __builtin_clz(int);\n");
1066         add_pre_buffer("extern int __builtin_clzl(long);\n");
1067         add_pre_buffer("extern int __builtin_clzll(long long);\n");
1068         add_pre_buffer("extern int __builtin_ctz(int);\n");
1069         add_pre_buffer("extern int __builtin_ctzl(long);\n");
1070         add_pre_buffer("extern int __builtin_ctzll(long long);\n");
1071         add_pre_buffer("extern int __builtin_ffs(int);\n");
1072         add_pre_buffer("extern int __builtin_ffsl(long);\n");
1073         add_pre_buffer("extern int __builtin_ffsll(long long);\n");
1074         add_pre_buffer("extern int __builtin_parity(unsigned int);\n");
1075         add_pre_buffer("extern int __builtin_parityl(unsigned long);\n");
1076         add_pre_buffer("extern int __builtin_parityll(unsigned long long);\n");
1077         add_pre_buffer("extern int __builtin_popcount(unsigned int);\n");
1078         add_pre_buffer("extern int __builtin_popcountl(unsigned long);\n");
1079         add_pre_buffer("extern int __builtin_popcountll(unsigned long long);\n");
1080
1081         /* And byte swaps.. */
1082         add_pre_buffer("extern unsigned short __builtin_bswap16(unsigned short);\n");
1083         add_pre_buffer("extern unsigned int __builtin_bswap32(unsigned int);\n");
1084         add_pre_buffer("extern unsigned long long __builtin_bswap64(unsigned long long);\n");
1085
1086         /* And atomic memory access functions.. */
1087         add_pre_buffer("extern int __sync_fetch_and_add(void *, ...);\n");
1088         add_pre_buffer("extern int __sync_fetch_and_sub(void *, ...);\n");
1089         add_pre_buffer("extern int __sync_fetch_and_or(void *, ...);\n");
1090         add_pre_buffer("extern int __sync_fetch_and_and(void *, ...);\n");
1091         add_pre_buffer("extern int __sync_fetch_and_xor(void *, ...);\n");
1092         add_pre_buffer("extern int __sync_fetch_and_nand(void *, ...);\n");
1093         add_pre_buffer("extern int __sync_add_and_fetch(void *, ...);\n");
1094         add_pre_buffer("extern int __sync_sub_and_fetch(void *, ...);\n");
1095         add_pre_buffer("extern int __sync_or_and_fetch(void *, ...);\n");
1096         add_pre_buffer("extern int __sync_and_and_fetch(void *, ...);\n");
1097         add_pre_buffer("extern int __sync_xor_and_fetch(void *, ...);\n");
1098         add_pre_buffer("extern int __sync_nand_and_fetch(void *, ...);\n");
1099         add_pre_buffer("extern int __sync_bool_compare_and_swap(void *, ...);\n");
1100         add_pre_buffer("extern int __sync_val_compare_and_swap(void *, ...);\n");
1101         add_pre_buffer("extern void __sync_synchronize();\n");
1102         add_pre_buffer("extern int __sync_lock_test_and_set(void *, ...);\n");
1103         add_pre_buffer("extern void __sync_lock_release(void *, ...);\n");
1104
1105         /* And some random ones.. */
1106         add_pre_buffer("extern void *__builtin_return_address(unsigned int);\n");
1107         add_pre_buffer("extern void *__builtin_extract_return_addr(void *);\n");
1108         add_pre_buffer("extern void *__builtin_frame_address(unsigned int);\n");
1109         add_pre_buffer("extern void __builtin_trap(void);\n");
1110         add_pre_buffer("extern void *__builtin_alloca(__SIZE_TYPE__);\n");
1111         add_pre_buffer("extern void __builtin_prefetch (const void *, ...);\n");
1112         add_pre_buffer("extern long __builtin_alpha_extbl(long, long);\n");
1113         add_pre_buffer("extern long __builtin_alpha_extwl(long, long);\n");
1114         add_pre_buffer("extern long __builtin_alpha_insbl(long, long);\n");
1115         add_pre_buffer("extern long __builtin_alpha_inswl(long, long);\n");
1116         add_pre_buffer("extern long __builtin_alpha_insql(long, long);\n");
1117         add_pre_buffer("extern long __builtin_alpha_inslh(long, long);\n");
1118         add_pre_buffer("extern long __builtin_alpha_cmpbge(long, long);\n");
1119         add_pre_buffer("extern int  __builtin_abs(int);\n");
1120         add_pre_buffer("extern long __builtin_labs(long);\n");
1121         add_pre_buffer("extern long long __builtin_llabs(long long);\n");
1122         add_pre_buffer("extern double __builtin_fabs(double);\n");
1123         add_pre_buffer("extern __SIZE_TYPE__ __builtin_va_arg_pack_len(void);\n");
1124
1125         /* Add Blackfin-specific stuff */
1126         add_pre_buffer(
1127                 "#ifdef __bfin__\n"
1128                 "extern void __builtin_bfin_csync(void);\n"
1129                 "extern void __builtin_bfin_ssync(void);\n"
1130                 "extern int __builtin_bfin_norm_fr1x32(int);\n"
1131                 "#endif\n"
1132         );
1133
1134         /* And some floating point stuff.. */
1135         add_pre_buffer("extern int __builtin_isgreater(float, float);\n");
1136         add_pre_buffer("extern int __builtin_isgreaterequal(float, float);\n");
1137         add_pre_buffer("extern int __builtin_isless(float, float);\n");
1138         add_pre_buffer("extern int __builtin_islessequal(float, float);\n");
1139         add_pre_buffer("extern int __builtin_islessgreater(float, float);\n");
1140         add_pre_buffer("extern int __builtin_isunordered(float, float);\n");
1141
1142         /* And some INFINITY / NAN stuff.. */
1143         add_pre_buffer("extern double __builtin_huge_val(void);\n");
1144         add_pre_buffer("extern float __builtin_huge_valf(void);\n");
1145         add_pre_buffer("extern long double __builtin_huge_vall(void);\n");
1146         add_pre_buffer("extern double __builtin_inf(void);\n");
1147         add_pre_buffer("extern float __builtin_inff(void);\n");
1148         add_pre_buffer("extern long double __builtin_infl(void);\n");
1149         add_pre_buffer("extern double __builtin_nan(const char *);\n");
1150         add_pre_buffer("extern float __builtin_nanf(const char *);\n");
1151         add_pre_buffer("extern long double __builtin_nanl(const char *);\n");
1152         add_pre_buffer("extern int __builtin_isinf_sign(float);\n");
1153         add_pre_buffer("extern int __builtin_isfinite(float);\n");
1154         add_pre_buffer("extern int __builtin_isnan(float);\n");
1155
1156         /* And some __FORTIFY_SOURCE ones.. */
1157         add_pre_buffer ("extern __SIZE_TYPE__ __builtin_object_size(const void *, int);\n");
1158         add_pre_buffer ("extern void * __builtin___memcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1159         add_pre_buffer ("extern void * __builtin___memmove_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1160         add_pre_buffer ("extern void * __builtin___mempcpy_chk(void *, const void *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1161         add_pre_buffer ("extern void * __builtin___memset_chk(void *, int, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1162         add_pre_buffer ("extern int __builtin___sprintf_chk(char *, int, __SIZE_TYPE__, const char *, ...);\n");
1163         add_pre_buffer ("extern int __builtin___snprintf_chk(char *, __SIZE_TYPE__, int , __SIZE_TYPE__, const char *, ...);\n");
1164         add_pre_buffer ("extern char * __builtin___stpcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
1165         add_pre_buffer ("extern char * __builtin___strcat_chk(char *, const char *, __SIZE_TYPE__);\n");
1166         add_pre_buffer ("extern char * __builtin___strcpy_chk(char *, const char *, __SIZE_TYPE__);\n");
1167         add_pre_buffer ("extern char * __builtin___strncat_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1168         add_pre_buffer ("extern char * __builtin___strncpy_chk(char *, const char *, __SIZE_TYPE__, __SIZE_TYPE__);\n");
1169         add_pre_buffer ("extern int __builtin___vsprintf_chk(char *, int, __SIZE_TYPE__, const char *, __builtin_va_list);\n");
1170         add_pre_buffer ("extern int __builtin___vsnprintf_chk(char *, __SIZE_TYPE__, int, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
1171         add_pre_buffer ("extern void __builtin_unreachable(void);\n");
1172
1173         /* And some from <stdlib.h> */
1174         add_pre_buffer("extern void __builtin_abort(void);\n");
1175         add_pre_buffer("extern void *__builtin_calloc(__SIZE_TYPE__, __SIZE_TYPE__);\n");
1176         add_pre_buffer("extern void __builtin_exit(int);\n");
1177         add_pre_buffer("extern void *__builtin_malloc(__SIZE_TYPE__);\n");
1178         add_pre_buffer("extern void *__builtin_realloc(void *, __SIZE_TYPE__);\n");
1179         add_pre_buffer("extern void __builtin_free(void *);\n");
1180
1181         /* And some from <stdio.h> */
1182         add_pre_buffer("extern int __builtin_printf(const char *, ...);\n");
1183         add_pre_buffer("extern int __builtin_sprintf(char *, const char *, ...);\n");
1184         add_pre_buffer("extern int __builtin_snprintf(char *, __SIZE_TYPE__, const char *, ...);\n");
1185         add_pre_buffer("extern int __builtin_puts(const char *);\n");
1186         add_pre_buffer("extern int __builtin_vprintf(const char *, __builtin_va_list);\n");
1187         add_pre_buffer("extern int __builtin_vsprintf(char *, const char *, __builtin_va_list);\n");
1188         add_pre_buffer("extern int __builtin_vsnprintf(char *, __SIZE_TYPE__, const char *, __builtin_va_list ap);\n");
1189 }
1190
1191 void create_builtin_stream(void)
1192 {
1193         add_pre_buffer("#weak_define __GNUC__ %d\n", gcc_major);
1194         add_pre_buffer("#weak_define __GNUC_MINOR__ %d\n", gcc_minor);
1195         add_pre_buffer("#weak_define __GNUC_PATCHLEVEL__ %d\n", gcc_patchlevel);
1196
1197         /* add the multiarch include directories, if any */
1198         if (multiarch_dir && *multiarch_dir) {
1199                 add_pre_buffer("#add_system \"/usr/include/%s\"\n", multiarch_dir);
1200                 add_pre_buffer("#add_system \"/usr/local/include/%s\"\n", multiarch_dir);
1201         }
1202
1203         /* We add compiler headers path here because we have to parse
1204          * the arguments to get it, falling back to default. */
1205         add_pre_buffer("#add_system \"%s/include\"\n", gcc_base_dir);
1206         add_pre_buffer("#add_system \"%s/include-fixed\"\n", gcc_base_dir);
1207
1208         add_pre_buffer("#define __extension__\n");
1209         add_pre_buffer("#define __pragma__\n");
1210         add_pre_buffer("#define _Pragma(x)\n");
1211
1212         // gcc defines __SIZE_TYPE__ to be size_t.  For linux/i86 and
1213         // solaris/sparc that is really "unsigned int" and for linux/x86_64
1214         // it is "long unsigned int".  In either case we can probably
1215         // get away with this.  We need the #weak_define as cgcc will define
1216         // the right __SIZE_TYPE__.
1217         if (size_t_ctype == &ulong_ctype)
1218                 add_pre_buffer("#weak_define __SIZE_TYPE__ long unsigned int\n");
1219         else
1220                 add_pre_buffer("#weak_define __SIZE_TYPE__ unsigned int\n");
1221         add_pre_buffer("#weak_define __STDC__ 1\n");
1222
1223         switch (standard)
1224         {
1225                 case STANDARD_C89:
1226                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1227                         break;
1228
1229                 case STANDARD_C94:
1230                         add_pre_buffer("#weak_define __STDC_VERSION__ 199409L\n");
1231                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1232                         break;
1233
1234                 case STANDARD_C99:
1235                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
1236                         add_pre_buffer("#weak_define __STRICT_ANSI__\n");
1237                         break;
1238
1239                 case STANDARD_GNU89:
1240                         break;
1241
1242                 case STANDARD_GNU99:
1243                         add_pre_buffer("#weak_define __STDC_VERSION__ 199901L\n");
1244                         break;
1245
1246                 case STANDARD_C11:
1247                         add_pre_buffer("#weak_define __STRICT_ANSI__ 1\n");
1248                 case STANDARD_GNU11:
1249                         add_pre_buffer("#weak_define __STDC_NO_ATOMICS__ 1\n");
1250                         add_pre_buffer("#weak_define __STDC_NO_COMPLEX__ 1\n");
1251                         add_pre_buffer("#weak_define __STDC_NO_THREADS__ 1\n");
1252                         add_pre_buffer("#weak_define __STDC_VERSION__ 201112L\n");
1253                         break;
1254
1255                 default:
1256                         assert (0);
1257         }
1258
1259         add_pre_buffer("#define __builtin_stdarg_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1260         add_pre_buffer("#define __builtin_va_start(a,b) ((a) = (__builtin_va_list)(&(b)))\n");
1261         add_pre_buffer("#define __builtin_ms_va_start(a,b) ((a) = (__builtin_ms_va_list)(&(b)))\n");
1262         add_pre_buffer("#define __builtin_va_arg(arg,type)  ({ type __va_arg_ret = *(type *)(arg); arg += sizeof(type); __va_arg_ret; })\n");
1263         add_pre_buffer("#define __builtin_va_alist (*(void *)0)\n");
1264         add_pre_buffer("#define __builtin_va_arg_incr(x) ((x) + 1)\n");
1265         add_pre_buffer("#define __builtin_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1266         add_pre_buffer("#define __builtin_ms_va_copy(dest, src) ({ dest = src; (void)0; })\n");
1267         add_pre_buffer("#define __builtin_va_end(arg)\n");
1268         add_pre_buffer("#define __builtin_ms_va_end(arg)\n");
1269         add_pre_buffer("#define __builtin_va_arg_pack()\n");
1270
1271         /* FIXME! We need to do these as special magic macros at expansion time! */
1272         add_pre_buffer("#define __BASE_FILE__ \"base_file.c\"\n");
1273
1274         if (optimize)
1275                 add_pre_buffer("#define __OPTIMIZE__ 1\n");
1276         if (optimize_size)
1277                 add_pre_buffer("#define __OPTIMIZE_SIZE__ 1\n");
1278 }
1279
1280 static struct symbol_list *sparse_tokenstream(struct token *token)
1281 {
1282         int builtin = token && !token->pos.stream;
1283
1284         // Preprocess the stream
1285         token = preprocess(token);
1286
1287         if (dump_macro_defs && !builtin)
1288                 dump_macro_definitions();
1289
1290         if (preprocess_only) {
1291                 while (!eof_token(token)) {
1292                         int prec = 1;
1293                         struct token *next = token->next;
1294                         const char *separator = "";
1295                         if (next->pos.whitespace)
1296                                 separator = " ";
1297                         if (next->pos.newline) {
1298                                 separator = "\n\t\t\t\t\t";
1299                                 prec = next->pos.pos;
1300                                 if (prec > 4)
1301                                         prec = 4;
1302                         }
1303                         printf("%s%.*s", show_token(token), prec, separator);
1304                         token = next;
1305                 }
1306                 putchar('\n');
1307
1308                 return NULL;
1309         }
1310
1311         // Parse the resulting C code
1312         while (!eof_token(token))
1313                 token = external_declaration(token, &translation_unit_used_list, NULL);
1314         return translation_unit_used_list;
1315 }
1316
1317 static struct symbol_list *sparse_file(const char *filename)
1318 {
1319         int fd;
1320         struct token *token;
1321
1322         if (strcmp (filename, "-") == 0) {
1323                 fd = 0;
1324         } else {
1325                 fd = open(filename, O_RDONLY);
1326                 if (fd < 0)
1327                         die("No such file: %s", filename);
1328         }
1329
1330         // Tokenize the input stream
1331         token = tokenize(filename, fd, NULL, includepath);
1332         store_all_tokens(token);
1333         close(fd);
1334
1335         return sparse_tokenstream(token);
1336 }
1337
1338 /*
1339  * This handles the "-include" directive etc: we're in global
1340  * scope, and all types/macros etc will affect all the following
1341  * files.
1342  *
1343  * NOTE NOTE NOTE! "#undef" of anything in this stage will
1344  * affect all subsequent files too, i.e. we can have non-local
1345  * behaviour between files!
1346  */
1347 static struct symbol_list *sparse_initial(void)
1348 {
1349         int i;
1350
1351         // Prepend any "include" file to the stream.
1352         // We're in global scope, it will affect all files!
1353         for (i = 0; i < cmdline_include_nr; i++)
1354                 add_pre_buffer("#argv_include \"%s\"\n", cmdline_include[i]);
1355
1356         return sparse_tokenstream(pre_buffer_begin);
1357 }
1358
1359 struct symbol_list *sparse_initialize(int argc, char **argv, struct string_list **filelist)
1360 {
1361         char **args;
1362         struct symbol_list *list;
1363
1364         // Initialize symbol stream first, so that we can add defines etc
1365         init_symbols();
1366         init_include_path();
1367
1368         args = argv;
1369         for (;;) {
1370                 char *arg = *++args;
1371                 if (!arg)
1372                         break;
1373
1374                 if (arg[0] == '-' && arg[1]) {
1375                         args = handle_switch(arg+1, args);
1376                         continue;
1377                 }
1378                 add_ptr_list_notag(filelist, arg);
1379         }
1380         handle_switch_W_finalize();
1381         handle_switch_v_finalize();
1382
1383         handle_arch_finalize();
1384
1385         list = NULL;
1386         if (!ptr_list_empty(filelist)) {
1387                 // Initialize type system
1388                 init_ctype();
1389                 handle_funsigned_char();
1390
1391                 create_builtin_stream();
1392                 predefined_macros();
1393                 if (!preprocess_only)
1394                         declare_builtin_functions();
1395
1396                 list = sparse_initial();
1397
1398                 /*
1399                  * Protect the initial token allocations, since
1400                  * they need to survive all the others
1401                  */
1402                 protect_token_alloc();
1403         }
1404         /*
1405          * Evaluate the complete symbol list
1406          * Note: This is not needed for normal cases.
1407          *       These symbols should only be predefined defines and
1408          *       declaratons which will be evaluated later, when needed.
1409          *       This is also the case when a file is directly included via
1410          *       '-include <file>' on the command line *AND* the file only
1411          *       contains defines, declarations and inline definitions.
1412          *       However, in the rare cases where the given file should
1413          *       contain some definitions, these will never be evaluated
1414          *       and thus won't be able to be linearized correctly.
1415          *       Hence the evaluate_symbol_list() here under.
1416          */
1417         evaluate_symbol_list(list);
1418         return list;
1419 }
1420
1421 struct symbol_list * sparse_keep_tokens(char *filename)
1422 {
1423         struct symbol_list *res;
1424
1425         /* Clear previous symbol list */
1426         translation_unit_used_list = NULL;
1427
1428         new_file_scope();
1429         res = sparse_file(filename);
1430
1431         /* And return it */
1432         return res;
1433 }
1434
1435
1436 struct symbol_list * __sparse(char *filename)
1437 {
1438         struct symbol_list *res;
1439
1440         res = sparse_keep_tokens(filename);
1441
1442         /* Drop the tokens for this file after parsing */
1443         clear_token_alloc();
1444
1445         /* And return it */
1446         return res;
1447 }
1448
1449 struct symbol_list * sparse(char *filename)
1450 {
1451         struct symbol_list *res = __sparse(filename);
1452
1453         if (has_error & ERROR_CURR_PHASE)
1454                 has_error = ERROR_PREV_PHASE;
1455         /* Evaluate the complete symbol list */
1456         evaluate_symbol_list(res);
1457
1458         return res;
1459 }