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