nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 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 "adt/error.h"
  75 #include "write_fluffy.h"
  76 #include "write_caml.h"
  77 #include "revision.h"
  78 #include "warning.h"
  79 #include "mangle.h"
  80
  81 #ifndef PREPROCESSOR
  82 #ifndef __WIN32__
  83 #define PREPROCESSOR "gcc -E -std=c99 -m32 -U__STRICT_ANSI__"
  84 #else
  85 #define PREPROCESSOR "cpp -std=c99 -m32 -U__STRICT_ANSI__"
  86 #endif
  87 #endif
  88
  89 #ifndef LINKER
  90 #define LINKER    "gcc -m32"
  91 #endif
  92
  93 #ifndef ASSEMBLER
  94 #ifdef __APPLE__
  95 #define ASSEMBLER "gcc -c -xassembler"
  96 #else
  97 #define ASSEMBLER "as --32"
  98 #endif
  99 #endif
 100
 101 /** The current c mode/dialect. */
 102 unsigned int c_mode = _C89 | _ANSI | _C99 | _GNUC;
 103
 104 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
 105 unsigned int machine_size = 32;
 106
 107 /** true if the char type is signed. */
 108 bool char_is_signed = true;
 109
 110 /** true for strict language checking. */
 111 bool strict_mode = false;
 112
 113 /** use builtins for some libc functions */
 114 bool use_builtins = false;
 115
 116 /** we have extern function with const attribute. */
 117 bool have_const_functions = false;
 118
 119 atomic_type_kind_t wchar_atomic_kind = ATOMIC_TYPE_INT;
 120
 121 /* to switch on printing of implicit casts */
 122 extern bool print_implicit_casts;
 123
 124 /* to switch on printing of parenthesis to indicate operator precedence */
 125 extern bool print_parenthesis;
 126
 127 static int             verbose;
 128 static struct obstack  cppflags_obst, ldflags_obst;
 129 static char            dep_target[1024];
 130 static const char     *outname;
 131
 132 typedef struct file_list_entry_t file_list_entry_t;
 133
 134 typedef enum filetype_t {
 135         FILETYPE_AUTODETECT,
 136         FILETYPE_C,
 137         FILETYPE_PREPROCESSED_C,
 138         FILETYPE_CXX,
 139         FILETYPE_PREPROCESSED_CXX,
 140         FILETYPE_ASSEMBLER,
 141         FILETYPE_PREPROCESSED_ASSEMBLER,
 142         FILETYPE_OBJECT,
 143         FILETYPE_UNKNOWN
 144 } filetype_t;
 145
 146 struct file_list_entry_t {
 147         const char  *name; /**< filename or NULL for stdin */
 148         filetype_t   type;
 149         file_list_entry_t *next;
 150 };
 151
 152 static file_list_entry_t *temp_files;
 153
 154 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 155 /**
 156  * Debug printf implementation.
 157  *
 158  * @param fmt  printf style format parameter
 159  */
 160 void dbg_printf(const char *fmt, ...)
 161 {
 162         va_list list;
 163
 164         if (firm_dump.debug_print) {
 165                 va_start(list, fmt);
 166                 vprintf(fmt, list);
 167                 va_end(list);
 168         }  /* if */
 169 }
 170 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 171
 172 static void initialize_firm(void)
 173 {
 174         firm_early_init();
 175
 176         dump_consts_local(1);
 177         dump_keepalive_edges(1);
 178 }
 179
 180 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 181                             const char *newext)
 182 {
 183         size_t last_dot = 0xffffffff;
 184         size_t i = 0;
 185
 186         if (inputname == NULL) {
 187                 snprintf(buf, buflen, "a%s", newext);
 188                 return;
 189         }
 190
 191         for (const char *c = inputname; *c != 0; ++c) {
 192                 if (*c == '.')
 193                         last_dot = i;
 194                 ++i;
 195         }
 196         if (last_dot == 0xffffffff)
 197                 last_dot = i;
 198
 199         if (last_dot >= buflen)
 200                 panic("filename too long");
 201         memcpy(buf, inputname, last_dot);
 202
 203         size_t extlen = strlen(newext) + 1;
 204         if (extlen + last_dot >= buflen)
 205                 panic("filename too long");
 206         memcpy(buf+last_dot, newext, extlen);
 207 }
 208
 209 #include "builtins.h"
 210
 211 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 212 {
 213         start_parsing();
 214
 215         if (use_builtins) {
 216                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 217                 parse();
 218         }
 219
 220         lexer_open_stream(in, input_name);
 221         parse();
 222
 223         translation_unit_t *unit = finish_parsing();
 224         return unit;
 225 }
 226
 227 static void lextest(FILE *in, const char *fname)
 228 {
 229         lexer_open_stream(in, fname);
 230
 231         do {
 232                 lexer_next_preprocessing_token();
 233                 print_token(stdout, &lexer_token);
 234                 putchar('\n');
 235         } while (lexer_token.type != T_EOF);
 236 }
 237
 238 static void add_flag(struct obstack *obst, const char *format, ...)
 239 {
 240         char buf[4096];
 241         va_list ap;
 242
 243         va_start(ap, format);
 244 #ifdef _WIN32
 245         int len =
 246 #endif
 247                 vsnprintf(buf, sizeof(buf), format, ap);
 248         va_end(ap);
 249
 250         obstack_1grow(obst, ' ');
 251 #ifdef _WIN32
 252         obstack_1grow(obst, '"');
 253         obstack_grow(obst, buf, len);
 254         obstack_1grow(obst, '"');
 255 #else
 256         /* escape stuff... */
 257         for (char *c = buf; *c != '\0'; ++c) {
 258                 switch(*c) {
 259                 case ' ':
 260                 case '"':
 261                 case '$':
 262                 case '&':
 263                 case '(':
 264                 case ')':
 265                 case ';':
 266                 case '<':
 267                 case '>':
 268                 case '\'':
 269                 case '\\':
 270                 case '\n':
 271                 case '\r':
 272                 case '\t':
 273                 case '`':
 274                         obstack_1grow(obst, '\\');
 275                         /* FALLTHROUGH */
 276                 default:
 277                         obstack_1grow(obst, *c);
 278                         break;
 279                 }
 280         }
 281 #endif
 282 }
 283
 284 static const char *type_to_string(type_t *type)
 285 {
 286         assert(type->kind == TYPE_ATOMIC);
 287         return get_atomic_kind_name(type->atomic.akind);
 288 }
 289
 290 static FILE *preprocess(const char *fname)
 291 {
 292         obstack_1grow(&cppflags_obst, '\0');
 293         const char *flags = obstack_finish(&cppflags_obst);
 294
 295         obstack_printf(&cppflags_obst, "%s", PREPROCESSOR);
 296
 297         /* setup default defines */
 298         add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 299         add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 300         add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 301         add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 302
 303         /* hack... */
 304         add_flag(&cppflags_obst, "-D__builtin_memcpy=memcpy");
 305
 306         /* handle dependency generation */
 307         if (dep_target[0] != '\0') {
 308                 add_flag(&cppflags_obst, "-MF");
 309                 add_flag(&cppflags_obst, dep_target);
 310                 if (outname != NULL) {
 311                                 add_flag(&cppflags_obst, "-MQ");
 312                                 add_flag(&cppflags_obst, outname);
 313                 }
 314         }
 315         if (flags[0] != '\0') {
 316                 obstack_printf(&cppflags_obst, " %s", flags);
 317         }
 318         add_flag(&cppflags_obst, fname);
 319
 320         obstack_1grow(&cppflags_obst, '\0');
 321         const char *buf = obstack_finish(&cppflags_obst);
 322         if (verbose) {
 323                 puts(buf);
 324         }
 325
 326         FILE *f = popen(buf, "r");
 327         if (f == NULL) {
 328                 fprintf(stderr, "invoking preprocessor failed\n");
 329                 exit(1);
 330         }
 331
 332         return f;
 333 }
 334
 335 static void assemble(const char *out, const char *in)
 336 {
 337         char buf[4096];
 338
 339         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 340         if (verbose) {
 341                 puts(buf);
 342         }
 343
 344         int err = system(buf);
 345         if (err != 0) {
 346                 fprintf(stderr, "assembler reported an error\n");
 347                 exit(1);
 348         }
 349 }
 350
 351 static void print_file_name(const char *file)
 352 {
 353         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 354
 355         obstack_1grow(&ldflags_obst, '\0');
 356         const char *flags = obstack_finish(&ldflags_obst);
 357
 358         /* construct commandline */
 359         obstack_printf(&ldflags_obst, "%s ", LINKER);
 360         obstack_printf(&ldflags_obst, "%s", flags);
 361         obstack_1grow(&ldflags_obst, '\0');
 362
 363         char *commandline = obstack_finish(&ldflags_obst);
 364
 365         if (verbose) {
 366                 puts(commandline);
 367         }
 368         int err = system(commandline);
 369         if (err != EXIT_SUCCESS) {
 370                 fprintf(stderr, "linker reported an error\n");
 371                 exit(1);
 372         }
 373 }
 374
 375 static const char *try_dir(const char *dir)
 376 {
 377         if (dir == NULL)
 378                 return dir;
 379         if (access(dir, R_OK | W_OK | X_OK) == 0)
 380                 return dir;
 381         return NULL;
 382 }
 383
 384 static const char *get_tempdir(void)
 385 {
 386         static const char *tmpdir = NULL;
 387
 388         if (tmpdir != NULL)
 389                 return tmpdir;
 390
 391         if (tmpdir == NULL)
 392                 tmpdir = try_dir(getenv("TMPDIR"));
 393         if (tmpdir == NULL)
 394                 tmpdir = try_dir(getenv("TMP"));
 395         if (tmpdir == NULL)
 396                 tmpdir = try_dir(getenv("TEMP"));
 397
 398 #ifdef P_tmpdir
 399         if (tmpdir == NULL)
 400                 tmpdir = try_dir(P_tmpdir);
 401 #endif
 402
 403         if (tmpdir == NULL)
 404                 tmpdir = try_dir("/var/tmp");
 405         if (tmpdir == NULL)
 406                 tmpdir = try_dir("/usr/tmp");
 407         if (tmpdir == NULL)
 408                 tmpdir = try_dir("/tmp");
 409
 410         if (tmpdir == NULL)
 411                 tmpdir = ".";
 412
 413         return tmpdir;
 414 }
 415
 416 #ifndef HAVE_MKSTEMP
 417 /* cheap and nasty mkstemp replacement */
 418 static int mkstemp(char *templ)
 419 {
 420         mktemp(templ);
 421         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 422 }
 423 #endif
 424
 425 /**
 426  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 427  * during linking (like glibc/gnu ld do for tmpnam)...
 428  */
 429 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 430 {
 431         const char *tempdir = get_tempdir();
 432
 433         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 434
 435         int fd = mkstemp(buffer);
 436         if (fd == -1) {
 437                 fprintf(stderr, "couldn't create temporary file: %s\n",
 438                         strerror(errno));
 439                 exit(1);
 440         }
 441         FILE *out = fdopen(fd, "w");
 442         if (out == NULL) {
 443                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 444                 exit(1);
 445         }
 446
 447         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 448         memset(entry, 0, sizeof(*entry));
 449
 450         size_t  name_len = strlen(buffer) + 1;
 451         char   *name     = malloc(name_len);
 452         memcpy(name, buffer, name_len);
 453         entry->name      = name;
 454
 455         entry->next = temp_files;
 456         temp_files  = entry;
 457
 458         return out;
 459 }
 460
 461 static void free_temp_files(void)
 462 {
 463         file_list_entry_t *entry = temp_files;
 464         file_list_entry_t *next;
 465         for ( ; entry != NULL; entry = next) {
 466                 next = entry->next;
 467
 468                 unlink(entry->name);
 469                 free((char*) entry->name);
 470                 free(entry);
 471         }
 472         temp_files = NULL;
 473 }
 474
 475 /**
 476  * Do the necessary lowering for compound parameters.
 477  */
 478 void lower_compound_params(void)
 479 {
 480         lower_params_t params;
 481
 482         params.def_ptr_alignment    = 4;
 483         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 484         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 485         params.find_pointer_type    = NULL;
 486         params.ret_compound_in_regs = NULL;
 487         lower_calls_with_compounds(&params);
 488 }
 489
 490 typedef enum compile_mode_t {
 491         BenchmarkParser,
 492         PreprocessOnly,
 493         ParseOnly,
 494         Compile,
 495         CompileDump,
 496         CompileAssemble,
 497         CompileAssembleLink,
 498         LexTest,
 499         PrintAst,
 500         PrintFluffy,
 501         PrintCaml
 502 } compile_mode_t;
 503
 504 static void usage(const char *argv0)
 505 {
 506         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 507 }
 508
 509 static void print_cparser_version(void) {
 510         firm_version_t ver;
 511         firm_get_version(&ver);
 512
 513         printf("cparser (%s) using libFirm (%u.%u",
 514                 cparser_REVISION, ver.major, ver.minor);
 515         if (ver.revision[0] != 0) {
 516                 putchar(' ');
 517                 fputs(ver.revision, stdout);
 518         }
 519         if (ver.build[0] != 0) {
 520                 putchar(' ');
 521                 fputs(ver.build, stdout);
 522         }
 523         puts(")\n");
 524 }
 525
 526 static void set_be_option(const char *arg)
 527 {
 528         int res = firm_be_option(arg);
 529         (void) res;
 530         assert(res);
 531 }
 532
 533 static void set_option(const char *arg)
 534 {
 535         int res = firm_option(arg);
 536         (void) res;
 537         assert(res);
 538 }
 539
 540 static void copy_file(FILE *dest, FILE *input)
 541 {
 542         char buf[16384];
 543
 544         while (!feof(input) && !ferror(dest)) {
 545                 size_t read = fread(buf, 1, sizeof(buf), input);
 546                 if (fwrite(buf, 1, read, dest) != read) {
 547                         perror("couldn't write output");
 548                 }
 549         }
 550 }
 551
 552 static inline bool streq(char const* a, char const* b)
 553 {
 554         return strcmp(a, b) == 0;
 555 }
 556
 557 static inline bool strstart(char const* str, char const* start)
 558 {
 559         do {
 560                 if (*start == '\0')
 561                         return true;
 562         } while (*str++ == *start++);
 563         return false;
 564 }
 565
 566 static FILE *open_file(const char *filename)
 567 {
 568         if (streq(filename, "-")) {
 569                 return stdin;
 570         }
 571
 572         FILE *in = fopen(filename, "r");
 573         if (in == NULL) {
 574                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 575                                 strerror(errno));
 576                 exit(1);
 577         }
 578
 579         return in;
 580 }
 581
 582 static filetype_t get_filetype_from_string(const char *string)
 583 {
 584         if (streq(string, "c") || streq(string, "c-header"))
 585                 return FILETYPE_C;
 586         if (streq(string, "c++") || streq(string, "c++-header"))
 587                 return FILETYPE_CXX;
 588         if (streq(string, "assembler"))
 589                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 590         if (streq(string, "assembler-with-cpp"))
 591                 return FILETYPE_ASSEMBLER;
 592         if (streq(string, "none"))
 593                 return FILETYPE_AUTODETECT;
 594
 595         return FILETYPE_UNKNOWN;
 596 }
 597
 598 static void init_os_support(void)
 599 {
 600         /* OS option must be set to the backend */
 601         switch (firm_opt.os_support) {
 602         case OS_SUPPORT_MINGW:
 603                 set_be_option("ia32-gasmode=mingw");
 604                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 605                 break;
 606         case OS_SUPPORT_LINUX:
 607                 set_be_option("ia32-gasmode=elf");
 608                 break;
 609         case OS_SUPPORT_MACHO:
 610                 set_be_option("ia32-gasmode=macho");
 611                 set_be_option("ia32-stackalign=4");
 612                 set_be_option("pic");
 613                 break;
 614         }
 615 }
 616
 617 typedef enum lang_standard_t {
 618         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 619         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 620         STANDARD_C89,     /* ISO C90 (sic) */
 621         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 622         STANDARD_C99,     /* ISO C99 */
 623         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 624         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 625         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 626         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 627 } lang_standard_t;
 628
 629 int main(int argc, char **argv)
 630 {
 631         initialize_firm();
 632
 633         const char        *dumpfunction         = NULL;
 634         const char        *print_file_name_file = NULL;
 635         compile_mode_t     mode                 = CompileAssembleLink;
 636         int                opt_level            = 1;
 637         int                result               = EXIT_SUCCESS;
 638         char               cpu_arch[16]         = "ia32";
 639         file_list_entry_t *files                = NULL;
 640         file_list_entry_t *last_file            = NULL;
 641         bool               construct_dep_target = false;
 642         struct obstack     file_obst;
 643
 644         atexit(free_temp_files);
 645
 646         /* hack for now... */
 647         if (strstr(argv[0], "pptest") != NULL) {
 648                 extern int pptest_main(int argc, char **argv);
 649                 return pptest_main(argc, argv);
 650         }
 651
 652         obstack_init(&cppflags_obst);
 653         obstack_init(&ldflags_obst);
 654         obstack_init(&file_obst);
 655
 656 #define GET_ARG_AFTER(def, args)                                             \
 657         def = &arg[sizeof(args)-1];                                              \
 658         if (def[0] == '\0') {                                                     \
 659                 ++i;                                                                 \
 660                 if (i >= argc) {                                                      \
 661                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 662                         argument_errors = true;                                          \
 663                         break;                                                           \
 664                 }                                                                    \
 665                 def = argv[i];                                                       \
 666                 if (def[0] == '-' && def[1] != '\0') {                                \
 667                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 668                         argument_errors = true;                                          \
 669                         continue;                                                        \
 670                 }                                                                    \
 671         }
 672
 673 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 674
 675         /* early options parsing (find out optimisation level and OS) */
 676         for (int i = 1; i < argc; ++i) {
 677                 const char *arg = argv[i];
 678                 if (arg[0] != '-')
 679                         continue;
 680
 681                 const char *option = &arg[1];
 682                 if (option[0] == 'O') {
 683                         sscanf(&option[1], "%d", &opt_level);
 684                 }
 685                 if (strcmp(arg, "-fwin32") == 0) {
 686                         firm_opt.os_support = OS_SUPPORT_MINGW;
 687                 } else if (strcmp(arg, "-fmac") == 0) {
 688                         firm_opt.os_support = OS_SUPPORT_MACHO;
 689                 } else if (strcmp(arg, "-flinux") == 0) {
 690                         firm_opt.os_support = OS_SUPPORT_LINUX;
 691                 }
 692         }
 693
 694         /* set target/os specific stuff */
 695         init_os_support();
 696
 697         /* apply optimisation level */
 698         switch(opt_level) {
 699         case 0:
 700                 set_option("no-opt");
 701                 break;
 702         case 1:
 703                 set_option("no-inline");
 704                 break;
 705         default:
 706         case 4:
 707                 set_option("strict-aliasing");
 708                 /* use_builtins = true; */
 709                 /* fallthrough */
 710         case 3:
 711                 set_option("cond-eval");
 712                 set_option("if-conv");
 713                 /* fallthrough */
 714         case 2:
 715                 set_option("inline");
 716                 set_option("deconv");
 717                 set_be_option("omitfp");
 718                 break;
 719         }
 720
 721         /* parse rest of options */
 722         lang_standard_t standard        = STANDARD_DEFAULT;
 723         unsigned        features_on     = 0;
 724         unsigned        features_off    = 0;
 725         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 726         bool            help_displayed  = false;
 727         bool            argument_errors = false;
 728         for (int i = 1; i < argc; ++i) {
 729                 const char *arg = argv[i];
 730                 if (arg[0] == '-' && arg[1] != '\0') {
 731                         /* an option */
 732                         const char *option = &arg[1];
 733                         if (option[0] == 'o') {
 734                                 GET_ARG_AFTER(outname, "-o");
 735                         } else if (option[0] == 'g') {
 736                                 set_be_option("debuginfo=stabs");
 737                                 set_be_option("omitfp=no");
 738                                 set_be_option("ia32-nooptcc=yes");
 739                         } else if (SINGLE_OPTION('c')) {
 740                                 mode = CompileAssemble;
 741                         } else if (SINGLE_OPTION('E')) {
 742                                 mode = PreprocessOnly;
 743                         } else if (SINGLE_OPTION('S')) {
 744                                 mode = Compile;
 745                         } else if (option[0] == 'O') {
 746                                 continue;
 747                         } else if (option[0] == 'I') {
 748                                 const char *opt;
 749                                 GET_ARG_AFTER(opt, "-I");
 750                                 add_flag(&cppflags_obst, "-I%s", opt);
 751                         } else if (option[0] == 'D') {
 752                                 const char *opt;
 753                                 GET_ARG_AFTER(opt, "-D");
 754                                 add_flag(&cppflags_obst, "-D%s", opt);
 755                         } else if (option[0] == 'U') {
 756                                 const char *opt;
 757                                 GET_ARG_AFTER(opt, "-U");
 758                                 add_flag(&cppflags_obst, "-U%s", opt);
 759                         } else if (option[0] == 'l') {
 760                                 const char *opt;
 761                                 GET_ARG_AFTER(opt, "-l");
 762                                 add_flag(&ldflags_obst, "-l%s", opt);
 763                         } else if (option[0] == 'L') {
 764                                 const char *opt;
 765                                 GET_ARG_AFTER(opt, "-L");
 766                                 add_flag(&ldflags_obst, "-L%s", opt);
 767                         } else if (SINGLE_OPTION('v')) {
 768                                 verbose = 1;
 769                         } else if (SINGLE_OPTION('w')) {
 770                                 memset(&warning, 0, sizeof(warning));
 771                         } else if (option[0] == 'x') {
 772                                 const char *opt;
 773                                 GET_ARG_AFTER(opt, "-x");
 774                                 forced_filetype = get_filetype_from_string(opt);
 775                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 776                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 777                                         argument_errors = true;
 778                                 }
 779                         } else if (streq(option, "M")) {
 780                                 mode = PreprocessOnly;
 781                                 add_flag(&cppflags_obst, "-M");
 782                         } else if (streq(option, "MMD") ||
 783                                    streq(option, "MD")) {
 784                             construct_dep_target = true;
 785                                 add_flag(&cppflags_obst, "-%s", option);
 786                         } else if (streq(option, "MM")  ||
 787                                    streq(option, "MP")) {
 788                                 add_flag(&cppflags_obst, "-%s", option);
 789                         } else if (streq(option, "MT") ||
 790                                    streq(option, "MQ") ||
 791                                    streq(option, "MF")) {
 792                                 const char *opt;
 793                                 GET_ARG_AFTER(opt, "-MT");
 794                                 add_flag(&cppflags_obst, "-%s", option);
 795                                 add_flag(&cppflags_obst, "%s", opt);
 796                         } else if (streq(option, "include")) {
 797                                 const char *opt;
 798                                 GET_ARG_AFTER(opt, "-include");
 799                                 add_flag(&cppflags_obst, "-include");
 800                                 add_flag(&cppflags_obst, "%s", opt);
 801                         } else if (streq(option, "isystem")) {
 802                                 const char *opt;
 803                                 GET_ARG_AFTER(opt, "-isystem");
 804                                 add_flag(&cppflags_obst, "-isystem");
 805                                 add_flag(&cppflags_obst, "%s", opt);
 806                         } else if (streq(option, "nostdinc")
 807                                         || streq(option, "trigraphs")) {
 808                                 /* pass these through to the preprocessor */
 809                                 add_flag(&cppflags_obst, "%s", arg);
 810                         } else if (streq(option, "pipe")) {
 811                                 /* here for gcc compatibility */
 812                         } else if (option[0] == 'f') {
 813                                 char const *orig_opt;
 814                                 GET_ARG_AFTER(orig_opt, "-f");
 815
 816                                 if (strstart(orig_opt, "align-loops=") ||
 817                                     strstart(orig_opt, "align-jumps=") ||
 818                                     strstart(orig_opt, "align-functions=")) {
 819                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 820                                 } else if (streq(orig_opt, "verbose-asm")) {
 821                                         /* ignore: we always print verbose assembler */
 822                                 } else {
 823                                         char const *opt         = orig_opt;
 824                                         bool        truth_value = true;
 825                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 826                                                 truth_value = false;
 827                                                 opt += 3;
 828                                         }
 829
 830                                         if (streq(opt, "dollars-in-identifiers")) {
 831                                                 allow_dollar_in_symbol = truth_value;
 832                                         } if (streq(opt, "builtins")) {
 833                                                 use_builtins = truth_value;
 834                                         } else if (streq(opt, "short-wchar")) {
 835                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 836                                                         : ATOMIC_TYPE_INT;
 837                                         } else if (streq(opt, "syntax-only")) {
 838                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 839                                         } else if (streq(opt, "omit-frame-pointer")) {
 840                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 841                                         } else if (streq(opt, "strength-reduce")) {
 842                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 843                                         } else if (streq(opt, "fast-math")               ||
 844                                                    streq(opt, "jump-tables")             ||
 845                                                    streq(opt, "unroll-loops")            ||
 846                                                    streq(opt, "expensive-optimizations") ||
 847                                                    streq(opt, "common")                  ||
 848                                                    streq(opt, "PIC")                     ||
 849                                                    streq(opt, "align-loops")             ||
 850                                                    streq(opt, "align-jumps")             ||
 851                                                    streq(opt, "align-functions")) {
 852                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 853                                         } else {
 854                                                 int res = firm_option(orig_opt);
 855                                                 if (res == 0) {
 856                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 857                                                                 orig_opt);
 858                                                         argument_errors = true;
 859                                                         continue;
 860                                                 } else if (res == -1) {
 861                                                         help_displayed = true;
 862                                                 }
 863                                         }
 864                                 }
 865                         } else if (option[0] == 'b') {
 866                                 const char *opt;
 867                                 GET_ARG_AFTER(opt, "-b");
 868                                 int res = firm_be_option(opt);
 869                                 if (res == 0) {
 870                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 871                                                 opt);
 872                                         argument_errors = true;
 873                                 } else if (res == -1) {
 874                                         help_displayed = true;
 875                                 } else if (strstart(opt, "isa=")) {
 876                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 877                                 }
 878                         } else if (option[0] == 'W') {
 879                                 if (strstart(option + 1, "p,")) {
 880                                         // pass options directly to the preprocessor
 881                                         const char *opt;
 882                                         GET_ARG_AFTER(opt, "-Wp,");
 883                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 884                                 } else if (strstart(option + 1, "l,")) {
 885                                         // pass options directly to the linker
 886                                         const char *opt;
 887                                         GET_ARG_AFTER(opt, "-Wl,");
 888                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 889                                 } else if (streq(option + 1, "no-trigraphs")
 890                                                         || streq(option + 1, "undef")) {
 891                                         add_flag(&cppflags_obst, "%s", arg);
 892                                 } else {
 893                                         set_warning_opt(&option[1]);
 894                                 }
 895                         } else if (option[0] == 'm') {
 896                                 /* -m options */
 897                                 const char *opt;
 898                                 char arch_opt[64];
 899
 900                                 GET_ARG_AFTER(opt, "-m");
 901                                 if (strstart(opt, "arch=")) {
 902                                         GET_ARG_AFTER(opt, "-march=");
 903                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 904                                         int res = firm_be_option(arch_opt);
 905                                         if (res == 0)
 906                                                 argument_errors = true;
 907                                         else {
 908                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 909                                                 int res = firm_be_option(arch_opt);
 910                                                 if (res == 0)
 911                                                         argument_errors = true;
 912                                         }
 913                                 } else if (strstart(opt, "tune=")) {
 914                                         GET_ARG_AFTER(opt, "-mtune=");
 915                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 916                                         int res = firm_be_option(arch_opt);
 917                                         if (res == 0)
 918                                                 argument_errors = true;
 919                                 } else if (strstart(opt, "cpu=")) {
 920                                         GET_ARG_AFTER(opt, "-mcpu=");
 921                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 922                                         int res = firm_be_option(arch_opt);
 923                                         if (res == 0)
 924                                                 argument_errors = true;
 925                                 } else if (strstart(opt, "fpmath=")) {
 926                                         GET_ARG_AFTER(opt, "-mfpmath=");
 927                                         if (streq(opt, "387"))
 928                                                 opt = "x87";
 929                                         else if (streq(opt, "sse"))
 930                                                 opt = "sse2";
 931                                         else {
 932                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 933                                                 argument_errors = true;
 934                                         }
 935                                         if (!argument_errors) {
 936                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 937                                                 int res = firm_be_option(arch_opt);
 938                                                 if (res == 0)
 939                                                         argument_errors = true;
 940                                         }
 941                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 942                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 943                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 944                                         int res = firm_be_option(arch_opt);
 945                                         if (res == 0)
 946                                                 argument_errors = true;
 947                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 948                                         set_be_option("omitleaffp=1");
 949                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 950                                         set_be_option("omitleaffp=0");
 951                                 } else {
 952                                         char *endptr;
 953                                         long int value = strtol(opt, &endptr, 10);
 954                                         if (*endptr != '\0') {
 955                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 956                                                 argument_errors = true;
 957                                         }
 958                                         if (value != 16 && value != 32 && value != 64) {
 959                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 960                                                 argument_errors = true;
 961                                         } else {
 962                                                 machine_size = (unsigned int)value;
 963                                         }
 964                                 }
 965                         } else if (streq(option, "pg")) {
 966                                 set_be_option("gprof");
 967                                 add_flag(&ldflags_obst, "-pg");
 968                         } else if (streq(option, "pedantic") ||
 969                                    streq(option, "ansi")) {
 970                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 971                         } else if (streq(option, "shared")) {
 972                                 add_flag(&ldflags_obst, "-shared");
 973                         } else if (strstart(option, "std=")) {
 974                                 const char *const o = &option[4];
 975                                 standard =
 976                                         streq(o, "c++")            ? STANDARD_CXX98   :
 977                                         streq(o, "c++98")          ? STANDARD_CXX98   :
 978                                         streq(o, "c89")            ? STANDARD_C89     :
 979                                         streq(o, "c99")            ? STANDARD_C99     :
 980                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
 981                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
 982                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
 983                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
 984                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
 985                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
 986                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
 987                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
 988                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
 989                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
 990                         } else if (streq(option, "version")) {
 991                                 print_cparser_version();
 992                         } else if (strstart(option, "print-file-name=")) {
 993                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
 994                         } else if (option[0] == '-') {
 995                                 /* double dash option */
 996                                 ++option;
 997                                 if (streq(option, "gcc")) {
 998                                         features_on  |=  _GNUC;
 999                                         features_off &= ~_GNUC;
1000                                 } else if (streq(option, "no-gcc")) {
1001                                         features_on  &= ~_GNUC;
1002                                         features_off |=  _GNUC;
1003                                 } else if (streq(option, "ms")) {
1004                                         features_on  |=  _MS;
1005                                         features_off &= ~_MS;
1006                                 } else if (streq(option, "no-ms")) {
1007                                         features_on  &= ~_MS;
1008                                         features_off |=  _MS;
1009                                 } else if (streq(option, "signed-chars")) {
1010                                         char_is_signed = true;
1011                                 } else if (streq(option, "unsigned-chars")) {
1012                                         char_is_signed = false;
1013                                 } else if (streq(option, "strict")) {
1014                                         strict_mode = true;
1015                                 } else if (streq(option, "lextest")) {
1016                                         mode = LexTest;
1017                                 } else if (streq(option, "benchmark")) {
1018                                         mode = BenchmarkParser;
1019                                 } else if (streq(option, "print-ast")) {
1020                                         mode = PrintAst;
1021                                 } else if (streq(option, "print-implicit-cast")) {
1022                                         print_implicit_casts = true;
1023                                 } else if (streq(option, "print-parenthesis")) {
1024                                         print_parenthesis = true;
1025                                 } else if (streq(option, "print-fluffy")) {
1026                                         mode = PrintFluffy;
1027                                 } else if (streq(option, "print-caml")) {
1028                                         mode = PrintCaml;
1029                                 } else if (streq(option, "version")) {
1030                                         print_cparser_version();
1031                                         exit(EXIT_SUCCESS);
1032                                 } else if (streq(option, "dump-function")) {
1033                                         ++i;
1034                                         if (i >= argc) {
1035                                                 fprintf(stderr, "error: "
1036                                                         "expected argument after '--dump-function'\n");
1037                                                 argument_errors = true;
1038                                                 break;
1039                                         }
1040                                         dumpfunction = argv[i];
1041                                         mode         = CompileDump;
1042                                 } else {
1043                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1044                                         argument_errors = true;
1045                                 }
1046                         } else {
1047                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1048                                 argument_errors = true;
1049                         }
1050                 } else {
1051                         filetype_t type = forced_filetype;
1052                         if (type == FILETYPE_AUTODETECT) {
1053                                 if (streq(arg, "-")) {
1054                                         /* - implicitly means C source file */
1055                                         type = FILETYPE_C;
1056                                 } else {
1057                                         const char *suffix = strrchr(arg, '.');
1058                                         /* Ensure there is at least one char before the suffix */
1059                                         if (suffix != NULL && suffix != arg) {
1060                                                 ++suffix;
1061                                                 type =
1062                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1063                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1064                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1065                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1066                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1067                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1068                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1069                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1070                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1071                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1072                                                         FILETYPE_AUTODETECT;
1073                                         }
1074                                 }
1075
1076                                 if (type == FILETYPE_AUTODETECT) {
1077                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
1078                                         continue;
1079                                 }
1080                         }
1081
1082                         file_list_entry_t *entry
1083                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1084                         memset(entry, 0, sizeof(entry[0]));
1085                         entry->name = arg;
1086                         entry->type = type;
1087
1088                         if (last_file != NULL) {
1089                                 last_file->next = entry;
1090                         } else {
1091                                 files = entry;
1092                         }
1093                         last_file = entry;
1094                 }
1095         }
1096
1097         if (print_file_name_file != NULL) {
1098                 print_file_name(print_file_name_file);
1099                 return 0;
1100         }
1101
1102         if (files == NULL) {
1103                 fprintf(stderr, "error: no input files specified\n");
1104                 argument_errors = true;
1105         }
1106
1107         if (help_displayed) {
1108                 return !argument_errors;
1109         }
1110         if (argument_errors) {
1111                 usage(argv[0]);
1112                 return 1;
1113         }
1114
1115         /* we do the lowering in ast2firm */
1116         firm_opt.lower_bitfields = FALSE;
1117
1118         gen_firm_init();
1119         init_symbol_table();
1120         init_types();
1121         init_typehash();
1122         init_basic_types();
1123         init_lexer();
1124         init_ast();
1125         init_parser();
1126         init_ast2firm();
1127         init_mangle();
1128
1129         if (construct_dep_target) {
1130                 if (outname != 0 && strlen(outname) >= 2) {
1131                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1132                 } else {
1133                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1134                 }
1135         } else {
1136                 dep_target[0] = '\0';
1137         }
1138
1139         char outnamebuf[4096];
1140         if (outname == NULL) {
1141                 const char *filename = files->name;
1142
1143                 switch(mode) {
1144                 case BenchmarkParser:
1145                 case PrintAst:
1146                 case PrintFluffy:
1147                 case PrintCaml:
1148                 case LexTest:
1149                 case PreprocessOnly:
1150                 case ParseOnly:
1151                         outname = "-";
1152                         break;
1153                 case Compile:
1154                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1155                         outname = outnamebuf;
1156                         break;
1157                 case CompileAssemble:
1158                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1159                         outname = outnamebuf;
1160                         break;
1161                 case CompileDump:
1162                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1163                                         ".vcg");
1164                         outname = outnamebuf;
1165                         break;
1166                 case CompileAssembleLink:
1167 #ifdef _WIN32
1168                         outname = "a.exe";
1169 #else
1170                         outname = "a.out";
1171 #endif
1172                         break;
1173                 }
1174         }
1175
1176         assert(outname != NULL);
1177
1178         FILE *out;
1179         if (streq(outname, "-")) {
1180                 out = stdout;
1181         } else {
1182                 out = fopen(outname, "w");
1183                 if (out == NULL) {
1184                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1185                                         strerror(errno));
1186                         return 1;
1187                 }
1188         }
1189
1190         file_list_entry_t *file;
1191         for (file = files; file != NULL; file = file->next) {
1192                 char        asm_tempfile[1024];
1193                 const char *filename = file->name;
1194                 filetype_t  filetype = file->type;
1195
1196                 if (filetype == FILETYPE_OBJECT)
1197                         continue;
1198
1199                 FILE *in = NULL;
1200                 if (mode == LexTest) {
1201                         if (in == NULL)
1202                                 in = open_file(filename);
1203                         lextest(in, filename);
1204                         fclose(in);
1205                         exit(EXIT_SUCCESS);
1206                 }
1207
1208                 FILE *preprocessed_in = NULL;
1209                 switch (filetype) {
1210                         case FILETYPE_C:
1211                                 filetype = FILETYPE_PREPROCESSED_C;
1212                                 goto preprocess;
1213                         case FILETYPE_CXX:
1214                                 filetype = FILETYPE_PREPROCESSED_CXX;
1215                                 goto preprocess;
1216                         case FILETYPE_ASSEMBLER:
1217                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1218                                 add_flag(&cppflags_obst, "-x");
1219                                 add_flag(&cppflags_obst, "assembler-with-cpp");
1220                                 goto preprocess;
1221 preprocess:
1222                                 /* no support for input on FILE* yet */
1223                                 if (in != NULL)
1224                                         panic("internal compiler error: in for preprocessor != NULL");
1225
1226                                 preprocessed_in = preprocess(filename);
1227                                 if (mode == PreprocessOnly) {
1228                                         copy_file(out, preprocessed_in);
1229                                         int result = pclose(preprocessed_in);
1230                                         fclose(out);
1231                                         /* remove output file in case of error */
1232                                         if (out != stdout && result != EXIT_SUCCESS) {
1233                                                 unlink(outname);
1234                                         }
1235                                         return result;
1236                                 }
1237
1238                                 in = preprocessed_in;
1239                                 break;
1240
1241                         default:
1242                                 break;
1243                 }
1244
1245                 FILE *asm_out;
1246                 if (mode == Compile) {
1247                         asm_out = out;
1248                 } else {
1249                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1250                 }
1251
1252                 if (in == NULL)
1253                         in = open_file(filename);
1254
1255                 /* preprocess and compile */
1256                 if (filetype == FILETYPE_PREPROCESSED_C) {
1257                         char const* invalid_mode;
1258                         switch (standard) {
1259                                 case STANDARD_ANSI:
1260                                 case STANDARD_C89:   c_mode = _C89;                break;
1261                                 /* TODO ^v determine difference between these two */
1262                                 case STANDARD_C90:   c_mode = _C89;                break;
1263                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1264                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1265
1266 default_c_warn:
1267                                         fprintf(stderr,
1268                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1269                                                         invalid_mode);
1270                                         /* FALLTHROUGH */
1271                                 case STANDARD_DEFAULT:
1272                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1273
1274                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1275                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1276                         }
1277                         goto do_parsing;
1278                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1279                         char const* invalid_mode;
1280                         switch (standard) {
1281                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1282                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1283                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1284                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1285                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1286
1287                                 case STANDARD_ANSI:
1288                                 case STANDARD_CXX98: c_mode = _CXX; break;
1289
1290 default_cxx_warn:
1291                                         fprintf(stderr,
1292                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1293                                                         invalid_mode);
1294                                 case STANDARD_DEFAULT:
1295                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1296                         }
1297
1298 do_parsing:
1299                         c_mode |= features_on;
1300                         c_mode &= ~features_off;
1301                         init_tokens();
1302                         translation_unit_t *const unit = do_parsing(in, filename);
1303
1304                         /* prints the AST even if errors occurred */
1305                         if (mode == PrintAst) {
1306                                 type_set_output(out);
1307                                 ast_set_output(out);
1308                                 print_ast(unit);
1309                         }
1310
1311                         if (error_count > 0) {
1312                                 /* parsing failed because of errors */
1313                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1314                                         warning_count);
1315                                 result = EXIT_FAILURE;
1316                                 continue;
1317                         } else if (warning_count > 0) {
1318                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1319                         }
1320
1321                         if (in == preprocessed_in) {
1322                                 int pp_result = pclose(preprocessed_in);
1323                                 if (pp_result != EXIT_SUCCESS) {
1324                                         /* remove output file */
1325                                         if (out != stdout)
1326                                                 unlink(outname);
1327                                         exit(EXIT_FAILURE);
1328                                 }
1329                         }
1330
1331                         if (mode == BenchmarkParser) {
1332                                 return result;
1333                         } else if (mode == PrintFluffy) {
1334                                 write_fluffy_decls(out, unit);
1335                                 continue;
1336                         } else if (mode == PrintCaml) {
1337                                 write_caml_decls(out, unit);
1338                                 continue;
1339                         }
1340
1341                         translation_unit_to_firm(unit);
1342
1343                         if (mode == ParseOnly) {
1344                                 continue;
1345                         }
1346
1347                         if (mode == CompileDump) {
1348                                 /* find irg */
1349                                 ident    *id     = new_id_from_str(dumpfunction);
1350                                 ir_graph *irg    = NULL;
1351                                 int       n_irgs = get_irp_n_irgs();
1352                                 for (int i = 0; i < n_irgs; ++i) {
1353                                         ir_graph *tirg   = get_irp_irg(i);
1354                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1355                                         if (irg_id == id) {
1356                                                 irg = tirg;
1357                                                 break;
1358                                         }
1359                                 }
1360
1361                                 if (irg == NULL) {
1362                                         fprintf(stderr, "No graph for function '%s' found\n",
1363                                                 dumpfunction);
1364                                         exit(1);
1365                                 }
1366
1367                                 dump_ir_block_graph_file(irg, out);
1368                                 fclose(out);
1369                                 exit(0);
1370                         }
1371
1372                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1373                                         have_const_functions);
1374                         if (asm_out != out) {
1375                                 fclose(asm_out);
1376                         }
1377                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1378                         copy_file(asm_out, in);
1379                         if (in == preprocessed_in) {
1380                                 int pp_result = pclose(preprocessed_in);
1381                                 if (pp_result != EXIT_SUCCESS) {
1382                                         /* remove output in error case */
1383                                         if (out != stdout)
1384                                                 unlink(outname);
1385                                         return pp_result;
1386                                 }
1387                         }
1388                         if (asm_out != out) {
1389                                 fclose(asm_out);
1390                         }
1391                 }
1392
1393                 if (mode == Compile)
1394                         continue;
1395
1396                 /* if we're here then we have preprocessed assembly */
1397                 filename = asm_tempfile;
1398                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1399
1400                 /* assemble */
1401                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1402                         char        temp[1024];
1403                         const char *filename_o;
1404                         if (mode == CompileAssemble) {
1405                                 fclose(out);
1406                                 filename_o = outname;
1407                         } else {
1408                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1409                                 fclose(tempf);
1410                                 filename_o = temp;
1411                         }
1412
1413                         assemble(filename_o, filename);
1414
1415                         size_t len = strlen(filename_o) + 1;
1416                         filename = obstack_copy(&file_obst, filename_o, len);
1417                         filetype = FILETYPE_OBJECT;
1418                 }
1419
1420                 /* ok we're done here, process next file */
1421                 file->name = filename;
1422                 file->type = filetype;
1423         }
1424
1425         if (result != EXIT_SUCCESS) {
1426                 if (out != stdout)
1427                         unlink(outname);
1428                 return result;
1429         }
1430
1431         /* link program file */
1432         if (mode == CompileAssembleLink) {
1433                 obstack_1grow(&ldflags_obst, '\0');
1434                 const char *flags = obstack_finish(&ldflags_obst);
1435
1436                 /* construct commandline */
1437                 obstack_printf(&file_obst, "%s", LINKER);
1438                 for (file_list_entry_t *entry = files; entry != NULL;
1439                                 entry = entry->next) {
1440                         if (entry->type != FILETYPE_OBJECT)
1441                                 continue;
1442
1443                         add_flag(&file_obst, "%s", entry->name);
1444                 }
1445
1446                 add_flag(&file_obst, "-o");
1447                 add_flag(&file_obst, outname);
1448                 obstack_printf(&file_obst, "%s", flags);
1449                 obstack_1grow(&file_obst, '\0');
1450
1451                 char *commandline = obstack_finish(&file_obst);
1452
1453                 if (verbose) {
1454                         puts(commandline);
1455                 }
1456                 int err = system(commandline);
1457                 if (err != EXIT_SUCCESS) {
1458                         fprintf(stderr, "linker reported an error\n");
1459                         exit(1);
1460                 }
1461         }
1462
1463         obstack_free(&cppflags_obst, NULL);
1464         obstack_free(&ldflags_obst, NULL);
1465         obstack_free(&file_obst, NULL);
1466
1467         exit_mangle();
1468         exit_ast2firm();
1469         exit_parser();
1470         exit_ast();
1471         exit_lexer();
1472         exit_typehash();
1473         exit_types();
1474         exit_tokens();
1475         exit_symbol_table();
1476         return 0;
1477 }