nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #define _GNU_SOURCE
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <stdbool.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <assert.h>
  30
  31 #ifdef _WIN32
  32
  33 #include <fcntl.h>
  34 #include <io.h>
  35
  36 /* no eXecute on Win32 */
  37 #define X_OK 0
  38 #define W_OK 2
  39 #define R_OK 4
  40
  41 #define O_RDWR          _O_RDWR
  42 #define O_CREAT         _O_CREAT
  43 #define O_EXCL          _O_EXCL
  44 #define O_BINARY        _O_BINARY
  45
  46 /* remap some names, we are not in the POSIX world */
  47 #define access(fname, mode)      _access(fname, mode)
  48 #define mktemp(tmpl)             _mktemp(tmpl)
  49 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  50 #define fdopen(fd, mode)         _fdopen(fd, mode)
  51 #define popen(cmd, mode)         _popen(cmd, mode)
  52 #define pclose(file)             _pclose(file)
  53 #define unlink(filename)         _unlink(filename)
  54
  55 #else
  56 #include <unistd.h>
  57 #define HAVE_MKSTEMP
  58 #endif
  59
  60 #include <libfirm/firm.h>
  61 #include <libfirm/be.h>
  62
  63 #include "lexer.h"
  64 #include "token_t.h"
  65 #include "types.h"
  66 #include "type_hash.h"
  67 #include "parser.h"
  68 #include "type_t.h"
  69 #include "ast2firm.h"
  70 #include "diagnostic.h"
  71 #include "lang_features.h"
  72 #include "driver/firm_opt.h"
  73 #include "driver/firm_cmdline.h"
  74 #include "driver/firm_timing.h"
  75 #include "adt/error.h"
  76 #include "wrappergen/write_fluffy.h"
  77 #include "wrappergen/write_caml.h"
  78 #include "wrappergen/write_jna.h"
  79 #include "revision.h"
  80 #include "warning.h"
  81 #include "mangle.h"
  82 #include "printer.h"
  83
  84 #ifndef PREPROCESSOR
  85 #ifndef __WIN32__
  86 #define PREPROCESSOR "gcc -E -m32 -U__STRICT_ANSI__"
  87 #else
  88 #define PREPROCESSOR "cpp -m32 -U__STRICT_ANSI__"
  89 #endif
  90 #endif
  91
  92 #ifndef LINKER
  93 #define LINKER    "gcc -m32"
  94 #endif
  95
  96 #ifndef ASSEMBLER
  97 #ifdef __APPLE__
  98 #define ASSEMBLER "gcc -m32 -c -xassembler"
  99 #else
 100 #define ASSEMBLER "as --32"
 101 #endif
 102 #endif
 103
 104 unsigned int       c_mode                = _C89 | _ANSI | _C99 | _GNUC;
 105 unsigned int       machine_size          = 32;
 106 bool               byte_order_big_endian = false;
 107 bool               char_is_signed        = true;
 108 bool               strict_mode           = false;
 109 bool               use_builtins          = false;
 110 bool               have_const_functions  = false;
 111 atomic_type_kind_t wchar_atomic_kind     = ATOMIC_TYPE_INT;
 112
 113 /* to switch on printing of implicit casts */
 114 extern bool print_implicit_casts;
 115
 116 /* to switch on printing of parenthesis to indicate operator precedence */
 117 extern bool print_parenthesis;
 118
 119 static int             verbose;
 120 static struct obstack  cppflags_obst, ldflags_obst;
 121 static char            dep_target[1024];
 122 static const char     *outname;
 123
 124 typedef enum lang_standard_t {
 125         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 126         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 127         STANDARD_C89,     /* ISO C90 (sic) */
 128         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 129         STANDARD_C99,     /* ISO C99 */
 130         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 131         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 132         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 133         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 134 } lang_standard_t;
 135
 136 static lang_standard_t standard;
 137
 138 typedef struct file_list_entry_t file_list_entry_t;
 139
 140 typedef enum filetype_t {
 141         FILETYPE_AUTODETECT,
 142         FILETYPE_C,
 143         FILETYPE_PREPROCESSED_C,
 144         FILETYPE_CXX,
 145         FILETYPE_PREPROCESSED_CXX,
 146         FILETYPE_ASSEMBLER,
 147         FILETYPE_PREPROCESSED_ASSEMBLER,
 148         FILETYPE_OBJECT,
 149         FILETYPE_IR,
 150         FILETYPE_UNKNOWN
 151 } filetype_t;
 152
 153 struct file_list_entry_t {
 154         const char  *name; /**< filename or NULL for stdin */
 155         filetype_t   type;
 156         file_list_entry_t *next;
 157 };
 158
 159 static file_list_entry_t *temp_files;
 160
 161 static void initialize_firm(void)
 162 {
 163         firm_early_init();
 164 }
 165
 166 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 167                             const char *newext)
 168 {
 169         if (inputname == NULL)
 170                 inputname = "a";
 171
 172         char const *const last_slash = strrchr(inputname, '/');
 173         char const *const filename   =
 174                 last_slash != NULL ? last_slash + 1 : inputname;
 175         char const *const last_dot   = strrchr(filename, '.');
 176         char const *const name_end   =
 177                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 178
 179         int const len = snprintf(buf, buflen, "%.*s%s",
 180                         (int)(name_end - filename), filename, newext);
 181 #ifdef _WIN32
 182         if (len < 0 || buflen <= (size_t)len)
 183 #else
 184         if (buflen <= (size_t)len)
 185 #endif
 186                 panic("filename too long");
 187 }
 188
 189 #include "gen_builtins.h"
 190
 191 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 192 {
 193         start_parsing();
 194
 195         if (use_builtins) {
 196                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 197                 parse();
 198         }
 199
 200         lexer_open_stream(in, input_name);
 201         parse();
 202
 203         translation_unit_t *unit = finish_parsing();
 204         return unit;
 205 }
 206
 207 static void lextest(FILE *in, const char *fname)
 208 {
 209         lexer_open_stream(in, fname);
 210
 211         do {
 212                 lexer_next_preprocessing_token();
 213                 print_token(stdout, &lexer_token);
 214                 putchar('\n');
 215         } while (lexer_token.type != T_EOF);
 216 }
 217
 218 static void add_flag(struct obstack *obst, const char *format, ...)
 219 {
 220         char buf[65536];
 221         va_list ap;
 222
 223         va_start(ap, format);
 224 #ifdef _WIN32
 225         int len =
 226 #endif
 227                 vsnprintf(buf, sizeof(buf), format, ap);
 228         va_end(ap);
 229
 230         obstack_1grow(obst, ' ');
 231 #ifdef _WIN32
 232         obstack_1grow(obst, '"');
 233         obstack_grow(obst, buf, len);
 234         obstack_1grow(obst, '"');
 235 #else
 236         /* escape stuff... */
 237         for (char *c = buf; *c != '\0'; ++c) {
 238                 switch(*c) {
 239                 case ' ':
 240                 case '"':
 241                 case '$':
 242                 case '&':
 243                 case '(':
 244                 case ')':
 245                 case ';':
 246                 case '<':
 247                 case '>':
 248                 case '\'':
 249                 case '\\':
 250                 case '\n':
 251                 case '\r':
 252                 case '\t':
 253                 case '`':
 254                 case '|':
 255                         obstack_1grow(obst, '\\');
 256                         /* FALLTHROUGH */
 257                 default:
 258                         obstack_1grow(obst, *c);
 259                         break;
 260                 }
 261         }
 262 #endif
 263 }
 264
 265 static const char *type_to_string(type_t *type)
 266 {
 267         assert(type->kind == TYPE_ATOMIC);
 268         return get_atomic_kind_name(type->atomic.akind);
 269 }
 270
 271 static FILE *preprocess(const char *fname, filetype_t filetype)
 272 {
 273         static const char *common_flags = NULL;
 274
 275         if (common_flags == NULL) {
 276                 obstack_1grow(&cppflags_obst, '\0');
 277                 const char *flags = obstack_finish(&cppflags_obst);
 278
 279                 /* setup default defines */
 280                 add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 281                 add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 282                 add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 283                 add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 284
 285                 add_flag(&cppflags_obst, "-U__VERSION__");
 286                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 287
 288                 if (flags[0] != '\0') {
 289                         size_t len = strlen(flags);
 290                         obstack_1grow(&cppflags_obst, ' ');
 291                         obstack_grow(&cppflags_obst, flags, len);
 292                 }
 293                 obstack_1grow(&cppflags_obst, '\0');
 294                 common_flags = obstack_finish(&cppflags_obst);
 295         }
 296
 297         assert(obstack_object_size(&cppflags_obst) == 0);
 298
 299         const char *preprocessor = getenv("CPARSER_PP");
 300         if (preprocessor == NULL)
 301                 preprocessor = PREPROCESSOR;
 302
 303         obstack_printf(&cppflags_obst, "%s ", preprocessor);
 304         switch (filetype) {
 305         case FILETYPE_C:
 306                 add_flag(&cppflags_obst, "-std=c99");
 307                 break;
 308         case FILETYPE_CXX:
 309                 add_flag(&cppflags_obst, "-std=c++98");
 310                 break;
 311         case FILETYPE_ASSEMBLER:
 312                 add_flag(&cppflags_obst, "-x");
 313                 add_flag(&cppflags_obst, "assembler-with-cpp");
 314                 break;
 315         default:
 316                 break;
 317         }
 318         obstack_printf(&cppflags_obst, "%s", common_flags);
 319
 320         /* handle dependency generation */
 321         if (dep_target[0] != '\0') {
 322                 add_flag(&cppflags_obst, "-MF");
 323                 add_flag(&cppflags_obst, dep_target);
 324                 if (outname != NULL) {
 325                                 add_flag(&cppflags_obst, "-MQ");
 326                                 add_flag(&cppflags_obst, outname);
 327                 }
 328         }
 329         add_flag(&cppflags_obst, fname);
 330
 331         obstack_1grow(&cppflags_obst, '\0');
 332         char *buf = obstack_finish(&cppflags_obst);
 333         if (verbose) {
 334                 puts(buf);
 335         }
 336
 337         FILE *f = popen(buf, "r");
 338         if (f == NULL) {
 339                 fprintf(stderr, "invoking preprocessor failed\n");
 340                 exit(1);
 341         }
 342
 343         /* we don't really need that anymore */
 344         obstack_free(&cppflags_obst, buf);
 345
 346         return f;
 347 }
 348
 349 static void assemble(const char *out, const char *in)
 350 {
 351         char buf[65536];
 352
 353         const char *assembler = getenv("CPARSER_AS");
 354         if (assembler == NULL)
 355                 assembler = ASSEMBLER;
 356
 357         snprintf(buf, sizeof(buf), "%s %s -o %s", assembler, in, out);
 358         if (verbose) {
 359                 puts(buf);
 360         }
 361
 362         int err = system(buf);
 363         if (err != 0) {
 364                 fprintf(stderr, "assembler reported an error\n");
 365                 exit(1);
 366         }
 367 }
 368
 369 static void print_file_name(const char *file)
 370 {
 371         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 372
 373         obstack_1grow(&ldflags_obst, '\0');
 374         const char *flags = obstack_finish(&ldflags_obst);
 375
 376         /* construct commandline */
 377         const char *linker = getenv("CPARSER_LINK");
 378         if (linker == NULL)
 379                 linker = LINKER;
 380         obstack_printf(&ldflags_obst, "%s ", linker);
 381         obstack_printf(&ldflags_obst, "%s", flags);
 382         obstack_1grow(&ldflags_obst, '\0');
 383
 384         char *commandline = obstack_finish(&ldflags_obst);
 385
 386         if (verbose) {
 387                 puts(commandline);
 388         }
 389         int err = system(commandline);
 390         if (err != EXIT_SUCCESS) {
 391                 fprintf(stderr, "linker reported an error\n");
 392                 exit(1);
 393         }
 394 }
 395
 396 static const char *try_dir(const char *dir)
 397 {
 398         if (dir == NULL)
 399                 return dir;
 400         if (access(dir, R_OK | W_OK | X_OK) == 0)
 401                 return dir;
 402         return NULL;
 403 }
 404
 405 static const char *get_tempdir(void)
 406 {
 407         static const char *tmpdir = NULL;
 408
 409         if (tmpdir != NULL)
 410                 return tmpdir;
 411
 412         if (tmpdir == NULL)
 413                 tmpdir = try_dir(getenv("TMPDIR"));
 414         if (tmpdir == NULL)
 415                 tmpdir = try_dir(getenv("TMP"));
 416         if (tmpdir == NULL)
 417                 tmpdir = try_dir(getenv("TEMP"));
 418
 419 #ifdef P_tmpdir
 420         if (tmpdir == NULL)
 421                 tmpdir = try_dir(P_tmpdir);
 422 #endif
 423
 424         if (tmpdir == NULL)
 425                 tmpdir = try_dir("/var/tmp");
 426         if (tmpdir == NULL)
 427                 tmpdir = try_dir("/usr/tmp");
 428         if (tmpdir == NULL)
 429                 tmpdir = try_dir("/tmp");
 430
 431         if (tmpdir == NULL)
 432                 tmpdir = ".";
 433
 434         return tmpdir;
 435 }
 436
 437 #ifndef HAVE_MKSTEMP
 438 /* cheap and nasty mkstemp replacement */
 439 static int mkstemp(char *templ)
 440 {
 441         mktemp(templ);
 442         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 443 }
 444 #endif
 445
 446 /**
 447  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 448  * during linking (like glibc/gnu ld do for tmpnam)...
 449  */
 450 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 451 {
 452         const char *tempdir = get_tempdir();
 453
 454         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 455
 456         int fd = mkstemp(buffer);
 457         if (fd == -1) {
 458                 fprintf(stderr, "couldn't create temporary file: %s\n",
 459                         strerror(errno));
 460                 exit(1);
 461         }
 462         FILE *out = fdopen(fd, "w");
 463         if (out == NULL) {
 464                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 465                 exit(1);
 466         }
 467
 468         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 469         memset(entry, 0, sizeof(*entry));
 470
 471         size_t  name_len = strlen(buffer) + 1;
 472         char   *name     = malloc(name_len);
 473         memcpy(name, buffer, name_len);
 474         entry->name      = name;
 475
 476         entry->next = temp_files;
 477         temp_files  = entry;
 478
 479         return out;
 480 }
 481
 482 static void free_temp_files(void)
 483 {
 484         file_list_entry_t *entry = temp_files;
 485         file_list_entry_t *next;
 486         for ( ; entry != NULL; entry = next) {
 487                 next = entry->next;
 488
 489                 unlink(entry->name);
 490                 free((char*) entry->name);
 491                 free(entry);
 492         }
 493         temp_files = NULL;
 494 }
 495
 496 /**
 497  * Do the necessary lowering for compound parameters.
 498  */
 499 void lower_compound_params(void)
 500 {
 501         lower_params_t params;
 502
 503         params.def_ptr_alignment    = 4;
 504         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 505         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 506         params.find_pointer_type    = NULL;
 507         params.ret_compound_in_regs = NULL;
 508         lower_calls_with_compounds(&params);
 509 }
 510
 511 typedef enum compile_mode_t {
 512         BenchmarkParser,
 513         PreprocessOnly,
 514         ParseOnly,
 515         Compile,
 516         CompileDump,
 517         CompileExportIR,
 518         CompileAssemble,
 519         CompileAssembleLink,
 520         LexTest,
 521         PrintAst,
 522         PrintFluffy,
 523         PrintCaml,
 524         PrintJna
 525 } compile_mode_t;
 526
 527 static void usage(const char *argv0)
 528 {
 529         fprintf(stderr, "Usage %s [options] input [-o output]\n", argv0);
 530 }
 531
 532 static void print_cparser_version(void)
 533 {
 534         printf("cparser (%s) using libFirm (%u.%u",
 535                cparser_REVISION, ir_get_version_major(),
 536                ir_get_version_minor());
 537
 538         const char *revision = ir_get_version_revision();
 539         if (revision[0] != 0) {
 540                 putchar(' ');
 541                 fputs(revision, stdout);
 542         }
 543
 544         const char *build = ir_get_version_build();
 545         if (build[0] != 0) {
 546                 putchar(' ');
 547                 fputs(build, stdout);
 548         }
 549         puts(")");
 550         puts("This is free software; see the source for copying conditions.  There is NO\n"
 551              "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
 552 }
 553
 554 static void print_help(const char *argv0)
 555 {
 556         usage(argv0);
 557         puts("");
 558         puts("\t-fhelp     Display help about firm optimisation options");
 559         puts("\t-bhelp     Display help about firm backend options");
 560         puts("A big number of gcc flags is also supported");
 561 }
 562
 563 static void set_be_option(const char *arg)
 564 {
 565         int res = be_parse_arg(arg);
 566         (void) res;
 567         assert(res);
 568 }
 569
 570 static void set_option(const char *arg)
 571 {
 572         int res = firm_option(arg);
 573         (void) res;
 574         assert(res);
 575 }
 576
 577 static void copy_file(FILE *dest, FILE *input)
 578 {
 579         char buf[16384];
 580
 581         while (!feof(input) && !ferror(dest)) {
 582                 size_t read = fread(buf, 1, sizeof(buf), input);
 583                 if (fwrite(buf, 1, read, dest) != read) {
 584                         perror("couldn't write output");
 585                 }
 586         }
 587 }
 588
 589 static inline bool streq(char const* a, char const* b)
 590 {
 591         return strcmp(a, b) == 0;
 592 }
 593
 594 static inline bool strstart(char const* str, char const* start)
 595 {
 596         do {
 597                 if (*start == '\0')
 598                         return true;
 599         } while (*str++ == *start++);
 600         return false;
 601 }
 602
 603 static FILE *open_file(const char *filename)
 604 {
 605         if (streq(filename, "-")) {
 606                 return stdin;
 607         }
 608
 609         FILE *in = fopen(filename, "r");
 610         if (in == NULL) {
 611                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 612                                 strerror(errno));
 613                 exit(1);
 614         }
 615
 616         return in;
 617 }
 618
 619 static filetype_t get_filetype_from_string(const char *string)
 620 {
 621         if (streq(string, "c") || streq(string, "c-header"))
 622                 return FILETYPE_C;
 623         if (streq(string, "c++") || streq(string, "c++-header"))
 624                 return FILETYPE_CXX;
 625         if (streq(string, "assembler"))
 626                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 627         if (streq(string, "assembler-with-cpp"))
 628                 return FILETYPE_ASSEMBLER;
 629         if (streq(string, "none"))
 630                 return FILETYPE_AUTODETECT;
 631
 632         return FILETYPE_UNKNOWN;
 633 }
 634
 635 static void init_os_support(void)
 636 {
 637         /* OS option must be set to the backend */
 638         switch (firm_opt.os_support) {
 639         case OS_SUPPORT_MINGW:
 640                 set_be_option("ia32-gasmode=mingw");
 641                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 642                 break;
 643         case OS_SUPPORT_LINUX:
 644                 set_be_option("ia32-gasmode=elf");
 645                 break;
 646         case OS_SUPPORT_MACHO:
 647                 set_be_option("ia32-gasmode=macho");
 648                 set_be_option("ia32-stackalign=4");
 649                 set_be_option("pic");
 650                 break;
 651         }
 652 }
 653
 654 int main(int argc, char **argv)
 655 {
 656         initialize_firm();
 657
 658         const char        *dumpfunction         = NULL;
 659         const char        *print_file_name_file = NULL;
 660         compile_mode_t     mode                 = CompileAssembleLink;
 661         int                opt_level            = 1;
 662         int                result               = EXIT_SUCCESS;
 663         char               cpu_arch[16]         = "ia32";
 664         file_list_entry_t *files                = NULL;
 665         file_list_entry_t *last_file            = NULL;
 666         bool               construct_dep_target = false;
 667         bool               do_timing            = false;
 668         struct obstack     file_obst;
 669
 670         atexit(free_temp_files);
 671
 672         /* hack for now... */
 673         if (strstr(argv[0], "pptest") != NULL) {
 674                 extern int pptest_main(int argc, char **argv);
 675                 return pptest_main(argc, argv);
 676         }
 677
 678         obstack_init(&cppflags_obst);
 679         obstack_init(&ldflags_obst);
 680         obstack_init(&file_obst);
 681
 682 #define GET_ARG_AFTER(def, args)                                             \
 683         def = &arg[sizeof(args)-1];                                              \
 684         if (def[0] == '\0') {                                                     \
 685                 ++i;                                                                 \
 686                 if (i >= argc) {                                                      \
 687                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 688                         argument_errors = true;                                          \
 689                         break;                                                           \
 690                 }                                                                    \
 691                 def = argv[i];                                                       \
 692                 if (def[0] == '-' && def[1] != '\0') {                                \
 693                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 694                         argument_errors = true;                                          \
 695                         continue;                                                        \
 696                 }                                                                    \
 697         }
 698
 699 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 700
 701         /* early options parsing (find out optimisation level and OS) */
 702         for (int i = 1; i < argc; ++i) {
 703                 const char *arg = argv[i];
 704                 if (arg[0] != '-')
 705                         continue;
 706
 707                 const char *option = &arg[1];
 708                 if (option[0] == 'O') {
 709                         sscanf(&option[1], "%d", &opt_level);
 710                 }
 711                 if (strcmp(arg, "-fwin32") == 0) {
 712                         firm_opt.os_support = OS_SUPPORT_MINGW;
 713                 } else if (strcmp(arg, "-fmac") == 0) {
 714                         firm_opt.os_support = OS_SUPPORT_MACHO;
 715                 } else if (strcmp(arg, "-flinux") == 0) {
 716                         firm_opt.os_support = OS_SUPPORT_LINUX;
 717                 }
 718         }
 719
 720         /* set target/os specific stuff */
 721         init_os_support();
 722
 723         /* apply optimisation level */
 724         switch(opt_level) {
 725         case 0:
 726                 set_option("no-opt");
 727                 break;
 728         case 1:
 729                 set_option("no-inline");
 730                 break;
 731         default:
 732         case 4:
 733                 /* use_builtins = true; */
 734                 /* fallthrough */
 735         case 3:
 736                 set_option("thread-jumps");
 737                 set_option("if-conversion");
 738                 /* fallthrough */
 739         case 2:
 740                 set_option("strict-aliasing");
 741                 set_option("inline");
 742                 set_option("deconv");
 743                 set_be_option("omitfp");
 744                 break;
 745         }
 746
 747         /* parse rest of options */
 748         standard                        = STANDARD_DEFAULT;
 749         unsigned        features_on     = 0;
 750         unsigned        features_off    = 0;
 751         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 752         bool            help_displayed  = false;
 753         bool            argument_errors = false;
 754         for (int i = 1; i < argc; ++i) {
 755                 const char *arg = argv[i];
 756                 if (arg[0] == '-' && arg[1] != '\0') {
 757                         /* an option */
 758                         const char *option = &arg[1];
 759                         if (option[0] == 'o') {
 760                                 GET_ARG_AFTER(outname, "-o");
 761                         } else if (option[0] == 'g') {
 762                                 set_be_option("debuginfo=stabs");
 763                                 set_be_option("omitfp=no");
 764                                 set_be_option("ia32-nooptcc=yes");
 765                         } else if (SINGLE_OPTION('c')) {
 766                                 mode = CompileAssemble;
 767                         } else if (SINGLE_OPTION('E')) {
 768                                 mode = PreprocessOnly;
 769                         } else if (SINGLE_OPTION('S')) {
 770                                 mode = Compile;
 771                         } else if (option[0] == 'O') {
 772                                 continue;
 773                         } else if (option[0] == 'I') {
 774                                 const char *opt;
 775                                 GET_ARG_AFTER(opt, "-I");
 776                                 add_flag(&cppflags_obst, "-I%s", opt);
 777                         } else if (option[0] == 'D') {
 778                                 const char *opt;
 779                                 GET_ARG_AFTER(opt, "-D");
 780                                 add_flag(&cppflags_obst, "-D%s", opt);
 781                         } else if (option[0] == 'U') {
 782                                 const char *opt;
 783                                 GET_ARG_AFTER(opt, "-U");
 784                                 add_flag(&cppflags_obst, "-U%s", opt);
 785                         } else if (option[0] == 'l') {
 786                                 const char *opt;
 787                                 GET_ARG_AFTER(opt, "-l");
 788                                 add_flag(&ldflags_obst, "-l%s", opt);
 789                         } else if (option[0] == 'L') {
 790                                 const char *opt;
 791                                 GET_ARG_AFTER(opt, "-L");
 792                                 add_flag(&ldflags_obst, "-L%s", opt);
 793                         } else if (SINGLE_OPTION('v')) {
 794                                 verbose = 1;
 795                         } else if (SINGLE_OPTION('w')) {
 796                                 memset(&warning, 0, sizeof(warning));
 797                         } else if (option[0] == 'x') {
 798                                 const char *opt;
 799                                 GET_ARG_AFTER(opt, "-x");
 800                                 forced_filetype = get_filetype_from_string(opt);
 801                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 802                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 803                                         argument_errors = true;
 804                                 }
 805                         } else if (streq(option, "M")) {
 806                                 mode = PreprocessOnly;
 807                                 add_flag(&cppflags_obst, "-M");
 808                         } else if (streq(option, "MMD") ||
 809                                    streq(option, "MD")) {
 810                             construct_dep_target = true;
 811                                 add_flag(&cppflags_obst, "-%s", option);
 812                         } else if (streq(option, "MM")  ||
 813                                    streq(option, "MP")) {
 814                                 add_flag(&cppflags_obst, "-%s", option);
 815                         } else if (streq(option, "MT") ||
 816                                    streq(option, "MQ") ||
 817                                    streq(option, "MF")) {
 818                                 const char *opt;
 819                                 GET_ARG_AFTER(opt, "-MT");
 820                                 add_flag(&cppflags_obst, "-%s", option);
 821                                 add_flag(&cppflags_obst, "%s", opt);
 822                         } else if (streq(option, "include")) {
 823                                 const char *opt;
 824                                 GET_ARG_AFTER(opt, "-include");
 825                                 add_flag(&cppflags_obst, "-include");
 826                                 add_flag(&cppflags_obst, "%s", opt);
 827                         } else if (streq(option, "isystem")) {
 828                                 const char *opt;
 829                                 GET_ARG_AFTER(opt, "-isystem");
 830                                 add_flag(&cppflags_obst, "-isystem");
 831                                 add_flag(&cppflags_obst, "%s", opt);
 832                         } else if (streq(option, "nostdinc")
 833                                         || streq(option, "trigraphs")) {
 834                                 /* pass these through to the preprocessor */
 835                                 add_flag(&cppflags_obst, "%s", arg);
 836                         } else if (streq(option, "pipe")) {
 837                                 /* here for gcc compatibility */
 838                         } else if (option[0] == 'f') {
 839                                 char const *orig_opt;
 840                                 GET_ARG_AFTER(orig_opt, "-f");
 841
 842                                 if (strstart(orig_opt, "input-charset=")) {
 843                                         char const* const encoding = strchr(orig_opt, '=') + 1;
 844                                         select_input_encoding(encoding);
 845                                 } else if (streq(orig_opt, "verbose-asm")) {
 846                                         /* ignore: we always print verbose assembler */
 847                                 } else {
 848                                         char const *opt         = orig_opt;
 849                                         bool        truth_value = true;
 850                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 851                                                 truth_value = false;
 852                                                 opt += 3;
 853                                         }
 854
 855                                         if (streq(opt, "builtins")) {
 856                                                 use_builtins = truth_value;
 857                                         } else if (streq(opt, "dollars-in-identifiers")) {
 858                                                 allow_dollar_in_symbol = truth_value;
 859                                         } else if (streq(opt, "omit-frame-pointer")) {
 860                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 861                                         } else if (streq(opt, "short-wchar")) {
 862                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 863                                                         : ATOMIC_TYPE_INT;
 864                                         } else if (streq(opt, "signed-char")) {
 865                                                 char_is_signed = truth_value;
 866                                         } else if (streq(opt, "strength-reduce")) {
 867                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 868                                         } else if (streq(opt, "syntax-only")) {
 869                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 870                                         } else if (streq(opt, "unsigned-char")) {
 871                                                 char_is_signed = !truth_value;
 872                                         } else if (truth_value == false &&
 873                                                    streq(opt, "asynchronous-unwind-tables")) {
 874                                             /* nothing todo, a gcc feature which we don't support
 875                                              * anyway was deactivated */
 876                                         } else if (strstart(orig_opt, "align-loops=") ||
 877                                                         strstart(orig_opt, "align-jumps=") ||
 878                                                         strstart(orig_opt, "align-functions=")) {
 879                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 880                                         } else if (strstart(orig_opt, "message-length=")) {
 881                                                         /* ignore: would only affect error message format */
 882                                         } else if (streq(opt, "fast-math")               ||
 883                                                    streq(opt, "jump-tables")             ||
 884                                                    streq(opt, "expensive-optimizations") ||
 885                                                    streq(opt, "common")                  ||
 886                                                    streq(opt, "optimize-sibling-calls")  ||
 887                                                    streq(opt, "align-loops")             ||
 888                                                    streq(opt, "align-jumps")             ||
 889                                                    streq(opt, "align-functions")         ||
 890                                                    streq(opt, "PIC")) {
 891                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 892                                         } else {
 893                                                 int res = firm_option(orig_opt);
 894                                                 if (res == 0) {
 895                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 896                                                                 orig_opt);
 897                                                         argument_errors = true;
 898                                                         continue;
 899                                                 } else if (res == -1) {
 900                                                         help_displayed = true;
 901                                                 }
 902                                         }
 903                                 }
 904                         } else if (option[0] == 'b') {
 905                                 const char *opt;
 906                                 GET_ARG_AFTER(opt, "-b");
 907                                 int res = be_parse_arg(opt);
 908                                 if (res == 0) {
 909                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 910                                                 opt);
 911                                         argument_errors = true;
 912                                 } else if (res == -1) {
 913                                         help_displayed = true;
 914                                 } else if (strstart(opt, "isa=")) {
 915                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 916                                 }
 917                         } else if (option[0] == 'W') {
 918                                 if (option[1] == '\0') {
 919                                         /* ignore -W, out defaults are already quiet verbose */
 920                                 } else if (strstart(option + 1, "p,")) {
 921                                         // pass options directly to the preprocessor
 922                                         const char *opt;
 923                                         GET_ARG_AFTER(opt, "-Wp,");
 924                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 925                                 } else if (strstart(option + 1, "l,")) {
 926                                         // pass options directly to the linker
 927                                         const char *opt;
 928                                         GET_ARG_AFTER(opt, "-Wl,");
 929                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 930                                 } else if (streq(option + 1, "no-trigraphs")
 931                                                         || streq(option + 1, "undef")) {
 932                                         add_flag(&cppflags_obst, "%s", arg);
 933                                 } else {
 934                                         set_warning_opt(&option[1]);
 935                                 }
 936                         } else if (option[0] == 'm') {
 937                                 /* -m options */
 938                                 const char *opt;
 939                                 char arch_opt[64];
 940
 941                                 GET_ARG_AFTER(opt, "-m");
 942                                 if (strstart(opt, "arch=")) {
 943                                         GET_ARG_AFTER(opt, "-march=");
 944                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 945                                         int res = be_parse_arg(arch_opt);
 946                                         if (res == 0) {
 947                                                 fprintf(stderr, "Unknown architecture '%s'\n", arch_opt);
 948                                                 argument_errors = true;
 949                                         } else {
 950                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 951                                                 int res = be_parse_arg(arch_opt);
 952                                                 if (res == 0)
 953                                                         argument_errors = true;
 954                                         }
 955                                 } else if (strstart(opt, "tune=")) {
 956                                         GET_ARG_AFTER(opt, "-mtune=");
 957                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 958                                         int res = be_parse_arg(arch_opt);
 959                                         if (res == 0)
 960                                                 argument_errors = true;
 961                                 } else if (strstart(opt, "cpu=")) {
 962                                         GET_ARG_AFTER(opt, "-mcpu=");
 963                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 964                                         int res = be_parse_arg(arch_opt);
 965                                         if (res == 0)
 966                                                 argument_errors = true;
 967                                 } else if (strstart(opt, "fpmath=")) {
 968                                         GET_ARG_AFTER(opt, "-mfpmath=");
 969                                         if (streq(opt, "387"))
 970                                                 opt = "x87";
 971                                         else if (streq(opt, "sse"))
 972                                                 opt = "sse2";
 973                                         else {
 974                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 975                                                 argument_errors = true;
 976                                         }
 977                                         if (!argument_errors) {
 978                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 979                                                 int res = be_parse_arg(arch_opt);
 980                                                 if (res == 0)
 981                                                         argument_errors = true;
 982                                         }
 983                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 984                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 985                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 986                                         int res = be_parse_arg(arch_opt);
 987                                         if (res == 0)
 988                                                 argument_errors = true;
 989                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 990                                         set_be_option("omitleaffp=1");
 991                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 992                                         set_be_option("omitleaffp=0");
 993                                 } else if (streq(opt, "rtd")) {
 994                                         default_calling_convention = CC_STDCALL;
 995                                 } else if (strstart(opt, "regparm=")) {
 996                                         fprintf(stderr, "error: regparm convention not supported yet\n");
 997                                         argument_errors = true;
 998                                 } else if (streq(opt, "soft-float")) {
 999                                         fprintf(stderr, "error: software floatingpoint not supported yet\n");
1000                                         argument_errors = true;
1001                                 } else {
1002                                         char *endptr;
1003                                         long int value = strtol(opt, &endptr, 10);
1004                                         if (*endptr != '\0') {
1005                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
1006                                                 argument_errors = true;
1007                                         }
1008                                         if (value != 16 && value != 32 && value != 64) {
1009                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
1010                                                 argument_errors = true;
1011                                         } else {
1012                                                 machine_size = (unsigned int)value;
1013                                         }
1014                                 }
1015                         } else if (streq(option, "pg")) {
1016                                 set_be_option("gprof");
1017                                 add_flag(&ldflags_obst, "-pg");
1018                         } else if (streq(option, "pedantic") ||
1019                                    streq(option, "ansi")) {
1020                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1021                         } else if (streq(option, "shared")) {
1022                                 add_flag(&ldflags_obst, "-shared");
1023                         } else if (strstart(option, "std=")) {
1024                                 const char *const o = &option[4];
1025                                 standard =
1026                                         streq(o, "c++")            ? STANDARD_CXX98   :
1027                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1028                                         streq(o, "c89")            ? STANDARD_C89     :
1029                                         streq(o, "c99")            ? STANDARD_C99     :
1030                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1031                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1032                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1033                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1034                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1035                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1036                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1037                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1038                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1039                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1040                         } else if (streq(option, "version")) {
1041                                 print_cparser_version();
1042                         } else if (strstart(option, "print-file-name=")) {
1043                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1044                         } else if (option[0] == '-') {
1045                                 /* double dash option */
1046                                 ++option;
1047                                 if (streq(option, "gcc")) {
1048                                         features_on  |=  _GNUC;
1049                                         features_off &= ~_GNUC;
1050                                 } else if (streq(option, "no-gcc")) {
1051                                         features_on  &= ~_GNUC;
1052                                         features_off |=  _GNUC;
1053                                 } else if (streq(option, "ms")) {
1054                                         features_on  |=  _MS;
1055                                         features_off &= ~_MS;
1056                                 } else if (streq(option, "no-ms")) {
1057                                         features_on  &= ~_MS;
1058                                         features_off |=  _MS;
1059                                 } else if (streq(option, "strict")) {
1060                                         strict_mode = true;
1061                                 } else if (streq(option, "lextest")) {
1062                                         mode = LexTest;
1063                                 } else if (streq(option, "benchmark")) {
1064                                         mode = BenchmarkParser;
1065                                 } else if (streq(option, "print-ast")) {
1066                                         mode = PrintAst;
1067                                 } else if (streq(option, "print-implicit-cast")) {
1068                                         print_implicit_casts = true;
1069                                 } else if (streq(option, "print-parenthesis")) {
1070                                         print_parenthesis = true;
1071                                 } else if (streq(option, "print-fluffy")) {
1072                                         mode = PrintFluffy;
1073                                 } else if (streq(option, "print-caml")) {
1074                                         mode = PrintCaml;
1075                                 } else if (streq(option, "print-jna")) {
1076                                         mode = PrintJna;
1077                                 } else if (streq(option, "time")) {
1078                                         do_timing = true;
1079                                 } else if (streq(option, "version")) {
1080                                         print_cparser_version();
1081                                         exit(EXIT_SUCCESS);
1082                                 } else if (streq(option, "help")) {
1083                                         print_help(argv[0]);
1084                                         help_displayed = true;
1085                                 } else if (streq(option, "dump-function")) {
1086                                         ++i;
1087                                         if (i >= argc) {
1088                                                 fprintf(stderr, "error: "
1089                                                         "expected argument after '--dump-function'\n");
1090                                                 argument_errors = true;
1091                                                 break;
1092                                         }
1093                                         dumpfunction = argv[i];
1094                                         mode         = CompileDump;
1095                                 } else if (streq(option, "export-ir")) {
1096                                         mode = CompileExportIR;
1097                                 } else {
1098                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1099                                         argument_errors = true;
1100                                 }
1101                         } else {
1102                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1103                                 argument_errors = true;
1104                         }
1105                 } else {
1106                         filetype_t type = forced_filetype;
1107                         if (type == FILETYPE_AUTODETECT) {
1108                                 if (streq(arg, "-")) {
1109                                         /* - implicitly means C source file */
1110                                         type = FILETYPE_C;
1111                                 } else {
1112                                         const char *suffix = strrchr(arg, '.');
1113                                         /* Ensure there is at least one char before the suffix */
1114                                         if (suffix != NULL && suffix != arg) {
1115                                                 ++suffix;
1116                                                 type =
1117                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1118                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1119                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1120                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1121                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1122                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1123                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1124                                                         streq(suffix, "ir")  ? FILETYPE_IR                     :
1125                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1126                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1127                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1128                                                         FILETYPE_OBJECT; /* gcc behavior: unknown file extension means object file */
1129                                         }
1130                                 }
1131                         }
1132
1133                         file_list_entry_t *entry
1134                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1135                         memset(entry, 0, sizeof(entry[0]));
1136                         entry->name = arg;
1137                         entry->type = type;
1138
1139                         if (last_file != NULL) {
1140                                 last_file->next = entry;
1141                         } else {
1142                                 files = entry;
1143                         }
1144                         last_file = entry;
1145                 }
1146         }
1147
1148         if (help_displayed) {
1149                 return !argument_errors;
1150         }
1151
1152         if (print_file_name_file != NULL) {
1153                 print_file_name(print_file_name_file);
1154                 return 0;
1155         }
1156         if (files == NULL) {
1157                 fprintf(stderr, "error: no input files specified\n");
1158                 argument_errors = true;
1159         }
1160
1161         if (argument_errors) {
1162                 usage(argv[0]);
1163                 return 1;
1164         }
1165
1166         /* we do the lowering in ast2firm */
1167         firm_opt.lower_bitfields = FALSE;
1168
1169         /* set the c_mode here, types depends on it */
1170         c_mode |= features_on;
1171         c_mode &= ~features_off;
1172
1173         gen_firm_init();
1174         byte_order_big_endian = be_get_backend_param()->byte_order_big_endian;
1175         init_symbol_table();
1176         init_types();
1177         init_typehash();
1178         init_basic_types();
1179         init_lexer();
1180         init_ast();
1181         init_parser();
1182         init_ast2firm();
1183         init_mangle();
1184
1185         if (do_timing)
1186                 timer_init();
1187
1188         if (construct_dep_target) {
1189                 if (outname != 0 && strlen(outname) >= 2) {
1190                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1191                 } else {
1192                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1193                 }
1194         } else {
1195                 dep_target[0] = '\0';
1196         }
1197
1198         char outnamebuf[4096];
1199         if (outname == NULL) {
1200                 const char *filename = files->name;
1201
1202                 switch(mode) {
1203                 case BenchmarkParser:
1204                 case PrintAst:
1205                 case PrintFluffy:
1206                 case PrintCaml:
1207                 case PrintJna:
1208                 case LexTest:
1209                 case PreprocessOnly:
1210                 case ParseOnly:
1211                         outname = "-";
1212                         break;
1213                 case Compile:
1214                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1215                         outname = outnamebuf;
1216                         break;
1217                 case CompileAssemble:
1218                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1219                         outname = outnamebuf;
1220                         break;
1221                 case CompileDump:
1222                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1223                                         ".vcg");
1224                         outname = outnamebuf;
1225                         break;
1226                 case CompileExportIR:
1227                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
1228                         outname = outnamebuf;
1229                         break;
1230                 case CompileAssembleLink:
1231 #ifdef _WIN32
1232                         outname = "a.exe";
1233 #else
1234                         outname = "a.out";
1235 #endif
1236                         break;
1237                 }
1238         }
1239
1240         assert(outname != NULL);
1241
1242         FILE *out;
1243         if (streq(outname, "-")) {
1244                 out = stdout;
1245         } else {
1246                 out = fopen(outname, "w");
1247                 if (out == NULL) {
1248                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1249                                         strerror(errno));
1250                         return 1;
1251                 }
1252         }
1253
1254         file_list_entry_t *file;
1255         bool               already_constructed_firm = false;
1256         for (file = files; file != NULL; file = file->next) {
1257                 char        asm_tempfile[1024];
1258                 const char *filename = file->name;
1259                 filetype_t  filetype = file->type;
1260
1261                 if (filetype == FILETYPE_OBJECT)
1262                         continue;
1263
1264                 FILE *in = NULL;
1265                 if (mode == LexTest) {
1266                         if (in == NULL)
1267                                 in = open_file(filename);
1268                         lextest(in, filename);
1269                         fclose(in);
1270                         exit(EXIT_SUCCESS);
1271                 }
1272
1273                 FILE *preprocessed_in = NULL;
1274                 filetype_t next_filetype = filetype;
1275                 switch (filetype) {
1276                         case FILETYPE_C:
1277                                 next_filetype = FILETYPE_PREPROCESSED_C;
1278                                 goto preprocess;
1279                         case FILETYPE_CXX:
1280                                 next_filetype = FILETYPE_PREPROCESSED_CXX;
1281                                 goto preprocess;
1282                         case FILETYPE_ASSEMBLER:
1283                                 next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1284                                 goto preprocess;
1285 preprocess:
1286                                 /* no support for input on FILE* yet */
1287                                 if (in != NULL)
1288                                         panic("internal compiler error: in for preprocessor != NULL");
1289
1290                                 preprocessed_in = preprocess(filename, filetype);
1291                                 if (mode == PreprocessOnly) {
1292                                         copy_file(out, preprocessed_in);
1293                                         int result = pclose(preprocessed_in);
1294                                         fclose(out);
1295                                         /* remove output file in case of error */
1296                                         if (out != stdout && result != EXIT_SUCCESS) {
1297                                                 unlink(outname);
1298                                         }
1299                                         return result;
1300                                 }
1301
1302                                 in = preprocessed_in;
1303                                 filetype = next_filetype;
1304                                 break;
1305
1306                         default:
1307                                 break;
1308                 }
1309
1310                 FILE *asm_out;
1311                 if (mode == Compile) {
1312                         asm_out = out;
1313                 } else {
1314                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1315                 }
1316
1317                 if (in == NULL)
1318                         in = open_file(filename);
1319
1320                 /* preprocess and compile */
1321                 if (filetype == FILETYPE_PREPROCESSED_C) {
1322                         char const* invalid_mode;
1323                         switch (standard) {
1324                                 case STANDARD_ANSI:
1325                                 case STANDARD_C89:   c_mode = _C89;                break;
1326                                 /* TODO determine difference between these two */
1327                                 case STANDARD_C90:   c_mode = _C89;                break;
1328                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1329                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1330
1331 default_c_warn:
1332                                         fprintf(stderr,
1333                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1334                                                         invalid_mode);
1335                                         /* FALLTHROUGH */
1336                                 case STANDARD_DEFAULT:
1337                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1338
1339                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1340                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1341                         }
1342                         goto do_parsing;
1343                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1344                         char const* invalid_mode;
1345                         switch (standard) {
1346                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1347                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1348                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1349                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1350                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1351
1352                                 case STANDARD_ANSI:
1353                                 case STANDARD_CXX98: c_mode = _CXX; break;
1354
1355 default_cxx_warn:
1356                                         fprintf(stderr,
1357                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1358                                                         invalid_mode);
1359                                 case STANDARD_DEFAULT:
1360                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1361                         }
1362
1363 do_parsing:
1364                         c_mode |= features_on;
1365                         c_mode &= ~features_off;
1366
1367                         /* do the actual parsing */
1368                         ir_timer_t *t_parsing = ir_timer_new();
1369                         timer_register(t_parsing, "Frontend: Parsing");
1370                         timer_push(t_parsing);
1371                         init_tokens();
1372                         translation_unit_t *const unit = do_parsing(in, filename);
1373                         timer_pop(t_parsing);
1374
1375                         /* prints the AST even if errors occurred */
1376                         if (mode == PrintAst) {
1377                                 print_to_file(out);
1378                                 print_ast(unit);
1379                         }
1380
1381                         if (error_count > 0) {
1382                                 /* parsing failed because of errors */
1383                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1384                                         warning_count);
1385                                 result = EXIT_FAILURE;
1386                                 continue;
1387                         } else if (warning_count > 0) {
1388                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1389                         }
1390
1391                         if (in == preprocessed_in) {
1392                                 int pp_result = pclose(preprocessed_in);
1393                                 if (pp_result != EXIT_SUCCESS) {
1394                                         /* remove output file */
1395                                         if (out != stdout)
1396                                                 unlink(outname);
1397                                         exit(EXIT_FAILURE);
1398                                 }
1399                         }
1400
1401                         if (mode == BenchmarkParser) {
1402                                 return result;
1403                         } else if (mode == PrintFluffy) {
1404                                 write_fluffy_decls(out, unit);
1405                                 continue;
1406                         } else if (mode == PrintCaml) {
1407                                 write_caml_decls(out, unit);
1408                                 continue;
1409                         } else if (mode == PrintJna) {
1410                                 write_jna_decls(out, unit);
1411                                 continue;
1412                         }
1413
1414                         /* build the firm graph */
1415                         ir_timer_t *t_construct = ir_timer_new();
1416                         timer_register(t_construct, "Frontend: Graph construction");
1417                         timer_push(t_construct);
1418                         if (already_constructed_firm) {
1419                                 panic("compiling multiple files/translation units not possible");
1420                         }
1421                         translation_unit_to_firm(unit);
1422                         already_constructed_firm = true;
1423                         timer_pop(t_construct);
1424
1425 graph_built:
1426                         if (mode == ParseOnly) {
1427                                 continue;
1428                         }
1429
1430                         if (mode == CompileDump) {
1431                                 /* find irg */
1432                                 ident    *id     = new_id_from_str(dumpfunction);
1433                                 ir_graph *irg    = NULL;
1434                                 int       n_irgs = get_irp_n_irgs();
1435                                 for (int i = 0; i < n_irgs; ++i) {
1436                                         ir_graph *tirg   = get_irp_irg(i);
1437                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1438                                         if (irg_id == id) {
1439                                                 irg = tirg;
1440                                                 break;
1441                                         }
1442                                 }
1443
1444                                 if (irg == NULL) {
1445                                         fprintf(stderr, "No graph for function '%s' found\n",
1446                                                 dumpfunction);
1447                                         exit(1);
1448                                 }
1449
1450                                 dump_ir_graph_file(out, irg);
1451                                 fclose(out);
1452                                 exit(0);
1453                         }
1454
1455                         if (mode == CompileExportIR) {
1456                                 fclose(out);
1457                                 ir_export(outname);
1458                                 exit(0);
1459                         }
1460
1461                         gen_firm_finish(asm_out, filename, have_const_functions);
1462                         if (asm_out != out) {
1463                                 fclose(asm_out);
1464                         }
1465                 } else if (filetype == FILETYPE_IR) {
1466                         fclose(in);
1467                         ir_import(filename);
1468                         goto graph_built;
1469                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1470                         copy_file(asm_out, in);
1471                         if (in == preprocessed_in) {
1472                                 int pp_result = pclose(preprocessed_in);
1473                                 if (pp_result != EXIT_SUCCESS) {
1474                                         /* remove output in error case */
1475                                         if (out != stdout)
1476                                                 unlink(outname);
1477                                         return pp_result;
1478                                 }
1479                         }
1480                         if (asm_out != out) {
1481                                 fclose(asm_out);
1482                         }
1483                 }
1484
1485                 if (mode == Compile)
1486                         continue;
1487
1488                 /* if we're here then we have preprocessed assembly */
1489                 filename = asm_tempfile;
1490                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1491
1492                 /* assemble */
1493                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1494                         char        temp[1024];
1495                         const char *filename_o;
1496                         if (mode == CompileAssemble) {
1497                                 fclose(out);
1498                                 filename_o = outname;
1499                         } else {
1500                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1501                                 fclose(tempf);
1502                                 filename_o = temp;
1503                         }
1504
1505                         assemble(filename_o, filename);
1506
1507                         size_t len = strlen(filename_o) + 1;
1508                         filename = obstack_copy(&file_obst, filename_o, len);
1509                         filetype = FILETYPE_OBJECT;
1510                 }
1511
1512                 /* ok we're done here, process next file */
1513                 file->name = filename;
1514                 file->type = filetype;
1515         }
1516
1517         if (result != EXIT_SUCCESS) {
1518                 if (out != stdout)
1519                         unlink(outname);
1520                 return result;
1521         }
1522
1523         /* link program file */
1524         if (mode == CompileAssembleLink) {
1525                 obstack_1grow(&ldflags_obst, '\0');
1526                 const char *flags = obstack_finish(&ldflags_obst);
1527
1528                 /* construct commandline */
1529                 const char *linker = getenv("CPARSER_LINK");
1530                 if (linker == NULL)
1531                         linker = LINKER;
1532                 obstack_printf(&file_obst, "%s", linker);
1533                 for (file_list_entry_t *entry = files; entry != NULL;
1534                                 entry = entry->next) {
1535                         if (entry->type != FILETYPE_OBJECT)
1536                                 continue;
1537
1538                         add_flag(&file_obst, "%s", entry->name);
1539                 }
1540
1541                 add_flag(&file_obst, "-o");
1542                 add_flag(&file_obst, outname);
1543                 obstack_printf(&file_obst, "%s", flags);
1544                 obstack_1grow(&file_obst, '\0');
1545
1546                 char *commandline = obstack_finish(&file_obst);
1547
1548                 if (verbose) {
1549                         puts(commandline);
1550                 }
1551                 int err = system(commandline);
1552                 if (err != EXIT_SUCCESS) {
1553                         fprintf(stderr, "linker reported an error\n");
1554                         exit(1);
1555                 }
1556         }
1557
1558         if (do_timing)
1559                 timer_term(stderr);
1560
1561         obstack_free(&cppflags_obst, NULL);
1562         obstack_free(&ldflags_obst, NULL);
1563         obstack_free(&file_obst, NULL);
1564
1565         exit_mangle();
1566         exit_ast2firm();
1567         exit_parser();
1568         exit_ast();
1569         exit_lexer();
1570         exit_typehash();
1571         exit_types();
1572         exit_tokens();
1573         exit_symbol_table();
1574         return 0;
1575 }