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                 case '|':
 275                         obstack_1grow(obst, '\\');
 276                         /* FALLTHROUGH */
 277                 default:
 278                         obstack_1grow(obst, *c);
 279                         break;
 280                 }
 281         }
 282 #endif
 283 }
 284
 285 static const char *type_to_string(type_t *type)
 286 {
 287         assert(type->kind == TYPE_ATOMIC);
 288         return get_atomic_kind_name(type->atomic.akind);
 289 }
 290
 291 static FILE *preprocess(const char *fname)
 292 {
 293         obstack_1grow(&cppflags_obst, '\0');
 294         const char *flags = obstack_finish(&cppflags_obst);
 295
 296         obstack_printf(&cppflags_obst, "%s", PREPROCESSOR);
 297
 298         /* setup default defines */
 299         add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 300         add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 301         add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 302         add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 303
 304         /* hack... */
 305         add_flag(&cppflags_obst, "-D__builtin_memcpy=memcpy");
 306
 307         /* handle dependency generation */
 308         if (dep_target[0] != '\0') {
 309                 add_flag(&cppflags_obst, "-MF");
 310                 add_flag(&cppflags_obst, dep_target);
 311                 if (outname != NULL) {
 312                                 add_flag(&cppflags_obst, "-MQ");
 313                                 add_flag(&cppflags_obst, outname);
 314                 }
 315         }
 316         if (flags[0] != '\0') {
 317                 obstack_printf(&cppflags_obst, " %s", flags);
 318         }
 319         add_flag(&cppflags_obst, fname);
 320
 321         obstack_1grow(&cppflags_obst, '\0');
 322         const char *buf = obstack_finish(&cppflags_obst);
 323         if (verbose) {
 324                 puts(buf);
 325         }
 326
 327         FILE *f = popen(buf, "r");
 328         if (f == NULL) {
 329                 fprintf(stderr, "invoking preprocessor failed\n");
 330                 exit(1);
 331         }
 332
 333         return f;
 334 }
 335
 336 static void assemble(const char *out, const char *in)
 337 {
 338         char buf[4096];
 339
 340         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 341         if (verbose) {
 342                 puts(buf);
 343         }
 344
 345         int err = system(buf);
 346         if (err != 0) {
 347                 fprintf(stderr, "assembler reported an error\n");
 348                 exit(1);
 349         }
 350 }
 351
 352 static void print_file_name(const char *file)
 353 {
 354         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 355
 356         obstack_1grow(&ldflags_obst, '\0');
 357         const char *flags = obstack_finish(&ldflags_obst);
 358
 359         /* construct commandline */
 360         obstack_printf(&ldflags_obst, "%s ", LINKER);
 361         obstack_printf(&ldflags_obst, "%s", flags);
 362         obstack_1grow(&ldflags_obst, '\0');
 363
 364         char *commandline = obstack_finish(&ldflags_obst);
 365
 366         if (verbose) {
 367                 puts(commandline);
 368         }
 369         int err = system(commandline);
 370         if (err != EXIT_SUCCESS) {
 371                 fprintf(stderr, "linker reported an error\n");
 372                 exit(1);
 373         }
 374 }
 375
 376 static const char *try_dir(const char *dir)
 377 {
 378         if (dir == NULL)
 379                 return dir;
 380         if (access(dir, R_OK | W_OK | X_OK) == 0)
 381                 return dir;
 382         return NULL;
 383 }
 384
 385 static const char *get_tempdir(void)
 386 {
 387         static const char *tmpdir = NULL;
 388
 389         if (tmpdir != NULL)
 390                 return tmpdir;
 391
 392         if (tmpdir == NULL)
 393                 tmpdir = try_dir(getenv("TMPDIR"));
 394         if (tmpdir == NULL)
 395                 tmpdir = try_dir(getenv("TMP"));
 396         if (tmpdir == NULL)
 397                 tmpdir = try_dir(getenv("TEMP"));
 398
 399 #ifdef P_tmpdir
 400         if (tmpdir == NULL)
 401                 tmpdir = try_dir(P_tmpdir);
 402 #endif
 403
 404         if (tmpdir == NULL)
 405                 tmpdir = try_dir("/var/tmp");
 406         if (tmpdir == NULL)
 407                 tmpdir = try_dir("/usr/tmp");
 408         if (tmpdir == NULL)
 409                 tmpdir = try_dir("/tmp");
 410
 411         if (tmpdir == NULL)
 412                 tmpdir = ".";
 413
 414         return tmpdir;
 415 }
 416
 417 #ifndef HAVE_MKSTEMP
 418 /* cheap and nasty mkstemp replacement */
 419 static int mkstemp(char *templ)
 420 {
 421         mktemp(templ);
 422         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 423 }
 424 #endif
 425
 426 /**
 427  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 428  * during linking (like glibc/gnu ld do for tmpnam)...
 429  */
 430 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 431 {
 432         const char *tempdir = get_tempdir();
 433
 434         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 435
 436         int fd = mkstemp(buffer);
 437         if (fd == -1) {
 438                 fprintf(stderr, "couldn't create temporary file: %s\n",
 439                         strerror(errno));
 440                 exit(1);
 441         }
 442         FILE *out = fdopen(fd, "w");
 443         if (out == NULL) {
 444                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 445                 exit(1);
 446         }
 447
 448         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 449         memset(entry, 0, sizeof(*entry));
 450
 451         size_t  name_len = strlen(buffer) + 1;
 452         char   *name     = malloc(name_len);
 453         memcpy(name, buffer, name_len);
 454         entry->name      = name;
 455
 456         entry->next = temp_files;
 457         temp_files  = entry;
 458
 459         return out;
 460 }
 461
 462 static void free_temp_files(void)
 463 {
 464         file_list_entry_t *entry = temp_files;
 465         file_list_entry_t *next;
 466         for ( ; entry != NULL; entry = next) {
 467                 next = entry->next;
 468
 469                 unlink(entry->name);
 470                 free((char*) entry->name);
 471                 free(entry);
 472         }
 473         temp_files = NULL;
 474 }
 475
 476 /**
 477  * Do the necessary lowering for compound parameters.
 478  */
 479 void lower_compound_params(void)
 480 {
 481         lower_params_t params;
 482
 483         params.def_ptr_alignment    = 4;
 484         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 485         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 486         params.find_pointer_type    = NULL;
 487         params.ret_compound_in_regs = NULL;
 488         lower_calls_with_compounds(&params);
 489 }
 490
 491 typedef enum compile_mode_t {
 492         BenchmarkParser,
 493         PreprocessOnly,
 494         ParseOnly,
 495         Compile,
 496         CompileDump,
 497         CompileAssemble,
 498         CompileAssembleLink,
 499         LexTest,
 500         PrintAst,
 501         PrintFluffy,
 502         PrintCaml
 503 } compile_mode_t;
 504
 505 static void usage(const char *argv0)
 506 {
 507         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 508 }
 509
 510 static void print_cparser_version(void) {
 511         firm_version_t ver;
 512         firm_get_version(&ver);
 513
 514         printf("cparser (%s) using libFirm (%u.%u",
 515                 cparser_REVISION, ver.major, ver.minor);
 516         if (ver.revision[0] != 0) {
 517                 putchar(' ');
 518                 fputs(ver.revision, stdout);
 519         }
 520         if (ver.build[0] != 0) {
 521                 putchar(' ');
 522                 fputs(ver.build, stdout);
 523         }
 524         puts(")\n");
 525 }
 526
 527 static void set_be_option(const char *arg)
 528 {
 529         int res = firm_be_option(arg);
 530         (void) res;
 531         assert(res);
 532 }
 533
 534 static void set_option(const char *arg)
 535 {
 536         int res = firm_option(arg);
 537         (void) res;
 538         assert(res);
 539 }
 540
 541 static void copy_file(FILE *dest, FILE *input)
 542 {
 543         char buf[16384];
 544
 545         while (!feof(input) && !ferror(dest)) {
 546                 size_t read = fread(buf, 1, sizeof(buf), input);
 547                 if (fwrite(buf, 1, read, dest) != read) {
 548                         perror("couldn't write output");
 549                 }
 550         }
 551 }
 552
 553 static inline bool streq(char const* a, char const* b)
 554 {
 555         return strcmp(a, b) == 0;
 556 }
 557
 558 static inline bool strstart(char const* str, char const* start)
 559 {
 560         do {
 561                 if (*start == '\0')
 562                         return true;
 563         } while (*str++ == *start++);
 564         return false;
 565 }
 566
 567 static FILE *open_file(const char *filename)
 568 {
 569         if (streq(filename, "-")) {
 570                 return stdin;
 571         }
 572
 573         FILE *in = fopen(filename, "r");
 574         if (in == NULL) {
 575                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 576                                 strerror(errno));
 577                 exit(1);
 578         }
 579
 580         return in;
 581 }
 582
 583 static filetype_t get_filetype_from_string(const char *string)
 584 {
 585         if (streq(string, "c") || streq(string, "c-header"))
 586                 return FILETYPE_C;
 587         if (streq(string, "c++") || streq(string, "c++-header"))
 588                 return FILETYPE_CXX;
 589         if (streq(string, "assembler"))
 590                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 591         if (streq(string, "assembler-with-cpp"))
 592                 return FILETYPE_ASSEMBLER;
 593         if (streq(string, "none"))
 594                 return FILETYPE_AUTODETECT;
 595
 596         return FILETYPE_UNKNOWN;
 597 }
 598
 599 static void init_os_support(void)
 600 {
 601         /* OS option must be set to the backend */
 602         switch (firm_opt.os_support) {
 603         case OS_SUPPORT_MINGW:
 604                 set_be_option("ia32-gasmode=mingw");
 605                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 606                 break;
 607         case OS_SUPPORT_LINUX:
 608                 set_be_option("ia32-gasmode=elf");
 609                 break;
 610         case OS_SUPPORT_MACHO:
 611                 set_be_option("ia32-gasmode=macho");
 612                 set_be_option("ia32-stackalign=4");
 613                 set_be_option("pic");
 614                 break;
 615         }
 616 }
 617
 618 typedef enum lang_standard_t {
 619         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 620         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 621         STANDARD_C89,     /* ISO C90 (sic) */
 622         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 623         STANDARD_C99,     /* ISO C99 */
 624         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 625         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 626         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 627         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 628 } lang_standard_t;
 629
 630 int main(int argc, char **argv)
 631 {
 632         initialize_firm();
 633
 634         const char        *dumpfunction         = NULL;
 635         const char        *print_file_name_file = NULL;
 636         compile_mode_t     mode                 = CompileAssembleLink;
 637         int                opt_level            = 1;
 638         int                result               = EXIT_SUCCESS;
 639         char               cpu_arch[16]         = "ia32";
 640         file_list_entry_t *files                = NULL;
 641         file_list_entry_t *last_file            = NULL;
 642         bool               construct_dep_target = false;
 643         struct obstack     file_obst;
 644
 645         atexit(free_temp_files);
 646
 647         /* hack for now... */
 648         if (strstr(argv[0], "pptest") != NULL) {
 649                 extern int pptest_main(int argc, char **argv);
 650                 return pptest_main(argc, argv);
 651         }
 652
 653         obstack_init(&cppflags_obst);
 654         obstack_init(&ldflags_obst);
 655         obstack_init(&file_obst);
 656
 657 #define GET_ARG_AFTER(def, args)                                             \
 658         def = &arg[sizeof(args)-1];                                              \
 659         if (def[0] == '\0') {                                                     \
 660                 ++i;                                                                 \
 661                 if (i >= argc) {                                                      \
 662                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 663                         argument_errors = true;                                          \
 664                         break;                                                           \
 665                 }                                                                    \
 666                 def = argv[i];                                                       \
 667                 if (def[0] == '-' && def[1] != '\0') {                                \
 668                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 669                         argument_errors = true;                                          \
 670                         continue;                                                        \
 671                 }                                                                    \
 672         }
 673
 674 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 675
 676         /* early options parsing (find out optimisation level and OS) */
 677         for (int i = 1; i < argc; ++i) {
 678                 const char *arg = argv[i];
 679                 if (arg[0] != '-')
 680                         continue;
 681
 682                 const char *option = &arg[1];
 683                 if (option[0] == 'O') {
 684                         sscanf(&option[1], "%d", &opt_level);
 685                 }
 686                 if (strcmp(arg, "-fwin32") == 0) {
 687                         firm_opt.os_support = OS_SUPPORT_MINGW;
 688                 } else if (strcmp(arg, "-fmac") == 0) {
 689                         firm_opt.os_support = OS_SUPPORT_MACHO;
 690                 } else if (strcmp(arg, "-flinux") == 0) {
 691                         firm_opt.os_support = OS_SUPPORT_LINUX;
 692                 }
 693         }
 694
 695         /* set target/os specific stuff */
 696         init_os_support();
 697
 698         /* apply optimisation level */
 699         switch(opt_level) {
 700         case 0:
 701                 set_option("no-opt");
 702                 break;
 703         case 1:
 704                 set_option("no-inline");
 705                 break;
 706         default:
 707         case 4:
 708                 set_option("strict-aliasing");
 709                 /* use_builtins = true; */
 710                 /* fallthrough */
 711         case 3:
 712                 set_option("cond-eval");
 713                 set_option("if-conv");
 714                 /* fallthrough */
 715         case 2:
 716                 set_option("inline");
 717                 set_option("deconv");
 718                 set_be_option("omitfp");
 719                 break;
 720         }
 721
 722         /* parse rest of options */
 723         lang_standard_t standard        = STANDARD_DEFAULT;
 724         unsigned        features_on     = 0;
 725         unsigned        features_off    = 0;
 726         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 727         bool            help_displayed  = false;
 728         bool            argument_errors = false;
 729         for (int i = 1; i < argc; ++i) {
 730                 const char *arg = argv[i];
 731                 if (arg[0] == '-' && arg[1] != '\0') {
 732                         /* an option */
 733                         const char *option = &arg[1];
 734                         if (option[0] == 'o') {
 735                                 GET_ARG_AFTER(outname, "-o");
 736                         } else if (option[0] == 'g') {
 737                                 set_be_option("debuginfo=stabs");
 738                                 set_be_option("omitfp=no");
 739                                 set_be_option("ia32-nooptcc=yes");
 740                         } else if (SINGLE_OPTION('c')) {
 741                                 mode = CompileAssemble;
 742                         } else if (SINGLE_OPTION('E')) {
 743                                 mode = PreprocessOnly;
 744                         } else if (SINGLE_OPTION('S')) {
 745                                 mode = Compile;
 746                         } else if (option[0] == 'O') {
 747                                 continue;
 748                         } else if (option[0] == 'I') {
 749                                 const char *opt;
 750                                 GET_ARG_AFTER(opt, "-I");
 751                                 add_flag(&cppflags_obst, "-I%s", opt);
 752                         } else if (option[0] == 'D') {
 753                                 const char *opt;
 754                                 GET_ARG_AFTER(opt, "-D");
 755                                 add_flag(&cppflags_obst, "-D%s", opt);
 756                         } else if (option[0] == 'U') {
 757                                 const char *opt;
 758                                 GET_ARG_AFTER(opt, "-U");
 759                                 add_flag(&cppflags_obst, "-U%s", opt);
 760                         } else if (option[0] == 'l') {
 761                                 const char *opt;
 762                                 GET_ARG_AFTER(opt, "-l");
 763                                 add_flag(&ldflags_obst, "-l%s", opt);
 764                         } else if (option[0] == 'L') {
 765                                 const char *opt;
 766                                 GET_ARG_AFTER(opt, "-L");
 767                                 add_flag(&ldflags_obst, "-L%s", opt);
 768                         } else if (SINGLE_OPTION('v')) {
 769                                 verbose = 1;
 770                         } else if (SINGLE_OPTION('w')) {
 771                                 memset(&warning, 0, sizeof(warning));
 772                         } else if (option[0] == 'x') {
 773                                 const char *opt;
 774                                 GET_ARG_AFTER(opt, "-x");
 775                                 forced_filetype = get_filetype_from_string(opt);
 776                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 777                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 778                                         argument_errors = true;
 779                                 }
 780                         } else if (streq(option, "M")) {
 781                                 mode = PreprocessOnly;
 782                                 add_flag(&cppflags_obst, "-M");
 783                         } else if (streq(option, "MMD") ||
 784                                    streq(option, "MD")) {
 785                             construct_dep_target = true;
 786                                 add_flag(&cppflags_obst, "-%s", option);
 787                         } else if (streq(option, "MM")  ||
 788                                    streq(option, "MP")) {
 789                                 add_flag(&cppflags_obst, "-%s", option);
 790                         } else if (streq(option, "MT") ||
 791                                    streq(option, "MQ") ||
 792                                    streq(option, "MF")) {
 793                                 const char *opt;
 794                                 GET_ARG_AFTER(opt, "-MT");
 795                                 add_flag(&cppflags_obst, "-%s", option);
 796                                 add_flag(&cppflags_obst, "%s", opt);
 797                         } else if (streq(option, "include")) {
 798                                 const char *opt;
 799                                 GET_ARG_AFTER(opt, "-include");
 800                                 add_flag(&cppflags_obst, "-include");
 801                                 add_flag(&cppflags_obst, "%s", opt);
 802                         } else if (streq(option, "isystem")) {
 803                                 const char *opt;
 804                                 GET_ARG_AFTER(opt, "-isystem");
 805                                 add_flag(&cppflags_obst, "-isystem");
 806                                 add_flag(&cppflags_obst, "%s", opt);
 807                         } else if (streq(option, "nostdinc")
 808                                         || streq(option, "trigraphs")) {
 809                                 /* pass these through to the preprocessor */
 810                                 add_flag(&cppflags_obst, "%s", arg);
 811                         } else if (streq(option, "pipe")) {
 812                                 /* here for gcc compatibility */
 813                         } else if (option[0] == 'f') {
 814                                 char const *orig_opt;
 815                                 GET_ARG_AFTER(orig_opt, "-f");
 816
 817                                 if (strstart(orig_opt, "align-loops=") ||
 818                                     strstart(orig_opt, "align-jumps=") ||
 819                                     strstart(orig_opt, "align-functions=")) {
 820                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 821                                 } else if (streq(orig_opt, "verbose-asm")) {
 822                                         /* ignore: we always print verbose assembler */
 823                                 } else {
 824                                         char const *opt         = orig_opt;
 825                                         bool        truth_value = true;
 826                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 827                                                 truth_value = false;
 828                                                 opt += 3;
 829                                         }
 830
 831                                         if (streq(opt, "dollars-in-identifiers")) {
 832                                                 allow_dollar_in_symbol = truth_value;
 833                                         } if (streq(opt, "builtins")) {
 834                                                 use_builtins = truth_value;
 835                                         } else if (streq(opt, "short-wchar")) {
 836                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 837                                                         : ATOMIC_TYPE_INT;
 838                                         } else if (streq(opt, "syntax-only")) {
 839                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 840                                         } else if (streq(opt, "omit-frame-pointer")) {
 841                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 842                                         } else if (streq(opt, "strength-reduce")) {
 843                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 844                                         } else if (streq(opt, "fast-math")               ||
 845                                                    streq(opt, "jump-tables")             ||
 846                                                    streq(opt, "unroll-loops")            ||
 847                                                    streq(opt, "expensive-optimizations") ||
 848                                                    streq(opt, "common")                  ||
 849                                                    streq(opt, "PIC")                     ||
 850                                                    streq(opt, "align-loops")             ||
 851                                                    streq(opt, "align-jumps")             ||
 852                                                    streq(opt, "align-functions")) {
 853                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 854                                         } else {
 855                                                 int res = firm_option(orig_opt);
 856                                                 if (res == 0) {
 857                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 858                                                                 orig_opt);
 859                                                         argument_errors = true;
 860                                                         continue;
 861                                                 } else if (res == -1) {
 862                                                         help_displayed = true;
 863                                                 }
 864                                         }
 865                                 }
 866                         } else if (option[0] == 'b') {
 867                                 const char *opt;
 868                                 GET_ARG_AFTER(opt, "-b");
 869                                 int res = firm_be_option(opt);
 870                                 if (res == 0) {
 871                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 872                                                 opt);
 873                                         argument_errors = true;
 874                                 } else if (res == -1) {
 875                                         help_displayed = true;
 876                                 } else if (strstart(opt, "isa=")) {
 877                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 878                                 }
 879                         } else if (option[0] == 'W') {
 880                                 if (strstart(option + 1, "p,")) {
 881                                         // pass options directly to the preprocessor
 882                                         const char *opt;
 883                                         GET_ARG_AFTER(opt, "-Wp,");
 884                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 885                                 } else if (strstart(option + 1, "l,")) {
 886                                         // pass options directly to the linker
 887                                         const char *opt;
 888                                         GET_ARG_AFTER(opt, "-Wl,");
 889                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 890                                 } else if (streq(option + 1, "no-trigraphs")
 891                                                         || streq(option + 1, "undef")) {
 892                                         add_flag(&cppflags_obst, "%s", arg);
 893                                 } else {
 894                                         set_warning_opt(&option[1]);
 895                                 }
 896                         } else if (option[0] == 'm') {
 897                                 /* -m options */
 898                                 const char *opt;
 899                                 char arch_opt[64];
 900
 901                                 GET_ARG_AFTER(opt, "-m");
 902                                 if (strstart(opt, "arch=")) {
 903                                         GET_ARG_AFTER(opt, "-march=");
 904                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 905                                         int res = firm_be_option(arch_opt);
 906                                         if (res == 0)
 907                                                 argument_errors = true;
 908                                         else {
 909                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 910                                                 int res = firm_be_option(arch_opt);
 911                                                 if (res == 0)
 912                                                         argument_errors = true;
 913                                         }
 914                                 } else if (strstart(opt, "tune=")) {
 915                                         GET_ARG_AFTER(opt, "-mtune=");
 916                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 917                                         int res = firm_be_option(arch_opt);
 918                                         if (res == 0)
 919                                                 argument_errors = true;
 920                                 } else if (strstart(opt, "cpu=")) {
 921                                         GET_ARG_AFTER(opt, "-mcpu=");
 922                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 923                                         int res = firm_be_option(arch_opt);
 924                                         if (res == 0)
 925                                                 argument_errors = true;
 926                                 } else if (strstart(opt, "fpmath=")) {
 927                                         GET_ARG_AFTER(opt, "-mfpmath=");
 928                                         if (streq(opt, "387"))
 929                                                 opt = "x87";
 930                                         else if (streq(opt, "sse"))
 931                                                 opt = "sse2";
 932                                         else {
 933                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 934                                                 argument_errors = true;
 935                                         }
 936                                         if (!argument_errors) {
 937                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 938                                                 int res = firm_be_option(arch_opt);
 939                                                 if (res == 0)
 940                                                         argument_errors = true;
 941                                         }
 942                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 943                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 944                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 945                                         int res = firm_be_option(arch_opt);
 946                                         if (res == 0)
 947                                                 argument_errors = true;
 948                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 949                                         set_be_option("omitleaffp=1");
 950                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 951                                         set_be_option("omitleaffp=0");
 952                                 } else {
 953                                         char *endptr;
 954                                         long int value = strtol(opt, &endptr, 10);
 955                                         if (*endptr != '\0') {
 956                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 957                                                 argument_errors = true;
 958                                         }
 959                                         if (value != 16 && value != 32 && value != 64) {
 960                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 961                                                 argument_errors = true;
 962                                         } else {
 963                                                 machine_size = (unsigned int)value;
 964                                         }
 965                                 }
 966                         } else if (streq(option, "pg")) {
 967                                 set_be_option("gprof");
 968                                 add_flag(&ldflags_obst, "-pg");
 969                         } else if (streq(option, "pedantic") ||
 970                                    streq(option, "ansi")) {
 971                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 972                         } else if (streq(option, "shared")) {
 973                                 add_flag(&ldflags_obst, "-shared");
 974                         } else if (strstart(option, "std=")) {
 975                                 const char *const o = &option[4];
 976                                 standard =
 977                                         streq(o, "c++")            ? STANDARD_CXX98   :
 978                                         streq(o, "c++98")          ? STANDARD_CXX98   :
 979                                         streq(o, "c89")            ? STANDARD_C89     :
 980                                         streq(o, "c99")            ? STANDARD_C99     :
 981                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
 982                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
 983                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
 984                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
 985                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
 986                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
 987                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
 988                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
 989                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
 990                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
 991                         } else if (streq(option, "version")) {
 992                                 print_cparser_version();
 993                         } else if (strstart(option, "print-file-name=")) {
 994                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
 995                         } else if (option[0] == '-') {
 996                                 /* double dash option */
 997                                 ++option;
 998                                 if (streq(option, "gcc")) {
 999                                         features_on  |=  _GNUC;
1000                                         features_off &= ~_GNUC;
1001                                 } else if (streq(option, "no-gcc")) {
1002                                         features_on  &= ~_GNUC;
1003                                         features_off |=  _GNUC;
1004                                 } else if (streq(option, "ms")) {
1005                                         features_on  |=  _MS;
1006                                         features_off &= ~_MS;
1007                                 } else if (streq(option, "no-ms")) {
1008                                         features_on  &= ~_MS;
1009                                         features_off |=  _MS;
1010                                 } else if (streq(option, "signed-chars")) {
1011                                         char_is_signed = true;
1012                                 } else if (streq(option, "unsigned-chars")) {
1013                                         char_is_signed = false;
1014                                 } else if (streq(option, "strict")) {
1015                                         strict_mode = true;
1016                                 } else if (streq(option, "lextest")) {
1017                                         mode = LexTest;
1018                                 } else if (streq(option, "benchmark")) {
1019                                         mode = BenchmarkParser;
1020                                 } else if (streq(option, "print-ast")) {
1021                                         mode = PrintAst;
1022                                 } else if (streq(option, "print-implicit-cast")) {
1023                                         print_implicit_casts = true;
1024                                 } else if (streq(option, "print-parenthesis")) {
1025                                         print_parenthesis = true;
1026                                 } else if (streq(option, "print-fluffy")) {
1027                                         mode = PrintFluffy;
1028                                 } else if (streq(option, "print-caml")) {
1029                                         mode = PrintCaml;
1030                                 } else if (streq(option, "version")) {
1031                                         print_cparser_version();
1032                                         exit(EXIT_SUCCESS);
1033                                 } else if (streq(option, "dump-function")) {
1034                                         ++i;
1035                                         if (i >= argc) {
1036                                                 fprintf(stderr, "error: "
1037                                                         "expected argument after '--dump-function'\n");
1038                                                 argument_errors = true;
1039                                                 break;
1040                                         }
1041                                         dumpfunction = argv[i];
1042                                         mode         = CompileDump;
1043                                 } else {
1044                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1045                                         argument_errors = true;
1046                                 }
1047                         } else {
1048                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1049                                 argument_errors = true;
1050                         }
1051                 } else {
1052                         filetype_t type = forced_filetype;
1053                         if (type == FILETYPE_AUTODETECT) {
1054                                 if (streq(arg, "-")) {
1055                                         /* - implicitly means C source file */
1056                                         type = FILETYPE_C;
1057                                 } else {
1058                                         const char *suffix = strrchr(arg, '.');
1059                                         /* Ensure there is at least one char before the suffix */
1060                                         if (suffix != NULL && suffix != arg) {
1061                                                 ++suffix;
1062                                                 type =
1063                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1064                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1065                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1066                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1067                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1068                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1069                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1070                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1071                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1072                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1073                                                         FILETYPE_AUTODETECT;
1074                                         }
1075                                 }
1076
1077                                 if (type == FILETYPE_AUTODETECT) {
1078                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
1079                                         continue;
1080                                 }
1081                         }
1082
1083                         file_list_entry_t *entry
1084                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1085                         memset(entry, 0, sizeof(entry[0]));
1086                         entry->name = arg;
1087                         entry->type = type;
1088
1089                         if (last_file != NULL) {
1090                                 last_file->next = entry;
1091                         } else {
1092                                 files = entry;
1093                         }
1094                         last_file = entry;
1095                 }
1096         }
1097
1098         if (print_file_name_file != NULL) {
1099                 print_file_name(print_file_name_file);
1100                 return 0;
1101         }
1102
1103         if (files == NULL) {
1104                 fprintf(stderr, "error: no input files specified\n");
1105                 argument_errors = true;
1106         }
1107
1108         if (help_displayed) {
1109                 return !argument_errors;
1110         }
1111         if (argument_errors) {
1112                 usage(argv[0]);
1113                 return 1;
1114         }
1115
1116         /* we do the lowering in ast2firm */
1117         firm_opt.lower_bitfields = FALSE;
1118
1119         gen_firm_init();
1120         init_symbol_table();
1121         init_types();
1122         init_typehash();
1123         init_basic_types();
1124         init_lexer();
1125         init_ast();
1126         init_parser();
1127         init_ast2firm();
1128         init_mangle();
1129
1130         if (construct_dep_target) {
1131                 if (outname != 0 && strlen(outname) >= 2) {
1132                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1133                 } else {
1134                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1135                 }
1136         } else {
1137                 dep_target[0] = '\0';
1138         }
1139
1140         char outnamebuf[4096];
1141         if (outname == NULL) {
1142                 const char *filename = files->name;
1143
1144                 switch(mode) {
1145                 case BenchmarkParser:
1146                 case PrintAst:
1147                 case PrintFluffy:
1148                 case PrintCaml:
1149                 case LexTest:
1150                 case PreprocessOnly:
1151                 case ParseOnly:
1152                         outname = "-";
1153                         break;
1154                 case Compile:
1155                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1156                         outname = outnamebuf;
1157                         break;
1158                 case CompileAssemble:
1159                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1160                         outname = outnamebuf;
1161                         break;
1162                 case CompileDump:
1163                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1164                                         ".vcg");
1165                         outname = outnamebuf;
1166                         break;
1167                 case CompileAssembleLink:
1168 #ifdef _WIN32
1169                         outname = "a.exe";
1170 #else
1171                         outname = "a.out";
1172 #endif
1173                         break;
1174                 }
1175         }
1176
1177         assert(outname != NULL);
1178
1179         FILE *out;
1180         if (streq(outname, "-")) {
1181                 out = stdout;
1182         } else {
1183                 out = fopen(outname, "w");
1184                 if (out == NULL) {
1185                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1186                                         strerror(errno));
1187                         return 1;
1188                 }
1189         }
1190
1191         file_list_entry_t *file;
1192         for (file = files; file != NULL; file = file->next) {
1193                 char        asm_tempfile[1024];
1194                 const char *filename = file->name;
1195                 filetype_t  filetype = file->type;
1196
1197                 if (filetype == FILETYPE_OBJECT)
1198                         continue;
1199
1200                 FILE *in = NULL;
1201                 if (mode == LexTest) {
1202                         if (in == NULL)
1203                                 in = open_file(filename);
1204                         lextest(in, filename);
1205                         fclose(in);
1206                         exit(EXIT_SUCCESS);
1207                 }
1208
1209                 FILE *preprocessed_in = NULL;
1210                 switch (filetype) {
1211                         case FILETYPE_C:
1212                                 filetype = FILETYPE_PREPROCESSED_C;
1213                                 goto preprocess;
1214                         case FILETYPE_CXX:
1215                                 filetype = FILETYPE_PREPROCESSED_CXX;
1216                                 goto preprocess;
1217                         case FILETYPE_ASSEMBLER:
1218                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1219                                 add_flag(&cppflags_obst, "-x");
1220                                 add_flag(&cppflags_obst, "assembler-with-cpp");
1221                                 goto preprocess;
1222 preprocess:
1223                                 /* no support for input on FILE* yet */
1224                                 if (in != NULL)
1225                                         panic("internal compiler error: in for preprocessor != NULL");
1226
1227                                 preprocessed_in = preprocess(filename);
1228                                 if (mode == PreprocessOnly) {
1229                                         copy_file(out, preprocessed_in);
1230                                         int result = pclose(preprocessed_in);
1231                                         fclose(out);
1232                                         /* remove output file in case of error */
1233                                         if (out != stdout && result != EXIT_SUCCESS) {
1234                                                 unlink(outname);
1235                                         }
1236                                         return result;
1237                                 }
1238
1239                                 in = preprocessed_in;
1240                                 break;
1241
1242                         default:
1243                                 break;
1244                 }
1245
1246                 FILE *asm_out;
1247                 if (mode == Compile) {
1248                         asm_out = out;
1249                 } else {
1250                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1251                 }
1252
1253                 if (in == NULL)
1254                         in = open_file(filename);
1255
1256                 /* preprocess and compile */
1257                 if (filetype == FILETYPE_PREPROCESSED_C) {
1258                         char const* invalid_mode;
1259                         switch (standard) {
1260                                 case STANDARD_ANSI:
1261                                 case STANDARD_C89:   c_mode = _C89;                break;
1262                                 /* TODO ^v determine difference between these two */
1263                                 case STANDARD_C90:   c_mode = _C89;                break;
1264                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1265                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1266
1267 default_c_warn:
1268                                         fprintf(stderr,
1269                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1270                                                         invalid_mode);
1271                                         /* FALLTHROUGH */
1272                                 case STANDARD_DEFAULT:
1273                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1274
1275                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1276                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1277                         }
1278                         goto do_parsing;
1279                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1280                         char const* invalid_mode;
1281                         switch (standard) {
1282                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1283                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1284                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1285                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1286                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1287
1288                                 case STANDARD_ANSI:
1289                                 case STANDARD_CXX98: c_mode = _CXX; break;
1290
1291 default_cxx_warn:
1292                                         fprintf(stderr,
1293                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1294                                                         invalid_mode);
1295                                 case STANDARD_DEFAULT:
1296                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1297                         }
1298
1299 do_parsing:
1300                         c_mode |= features_on;
1301                         c_mode &= ~features_off;
1302                         init_tokens();
1303                         translation_unit_t *const unit = do_parsing(in, filename);
1304
1305                         /* prints the AST even if errors occurred */
1306                         if (mode == PrintAst) {
1307                                 type_set_output(out);
1308                                 ast_set_output(out);
1309                                 print_ast(unit);
1310                         }
1311
1312                         if (error_count > 0) {
1313                                 /* parsing failed because of errors */
1314                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1315                                         warning_count);
1316                                 result = EXIT_FAILURE;
1317                                 continue;
1318                         } else if (warning_count > 0) {
1319                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1320                         }
1321
1322                         if (in == preprocessed_in) {
1323                                 int pp_result = pclose(preprocessed_in);
1324                                 if (pp_result != EXIT_SUCCESS) {
1325                                         /* remove output file */
1326                                         if (out != stdout)
1327                                                 unlink(outname);
1328                                         exit(EXIT_FAILURE);
1329                                 }
1330                         }
1331
1332                         if (mode == BenchmarkParser) {
1333                                 return result;
1334                         } else if (mode == PrintFluffy) {
1335                                 write_fluffy_decls(out, unit);
1336                                 continue;
1337                         } else if (mode == PrintCaml) {
1338                                 write_caml_decls(out, unit);
1339                                 continue;
1340                         }
1341
1342                         translation_unit_to_firm(unit);
1343
1344                         if (mode == ParseOnly) {
1345                                 continue;
1346                         }
1347
1348                         if (mode == CompileDump) {
1349                                 /* find irg */
1350                                 ident    *id     = new_id_from_str(dumpfunction);
1351                                 ir_graph *irg    = NULL;
1352                                 int       n_irgs = get_irp_n_irgs();
1353                                 for (int i = 0; i < n_irgs; ++i) {
1354                                         ir_graph *tirg   = get_irp_irg(i);
1355                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1356                                         if (irg_id == id) {
1357                                                 irg = tirg;
1358                                                 break;
1359                                         }
1360                                 }
1361
1362                                 if (irg == NULL) {
1363                                         fprintf(stderr, "No graph for function '%s' found\n",
1364                                                 dumpfunction);
1365                                         exit(1);
1366                                 }
1367
1368                                 dump_ir_block_graph_file(irg, out);
1369                                 fclose(out);
1370                                 exit(0);
1371                         }
1372
1373                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1374                                         have_const_functions);
1375                         if (asm_out != out) {
1376                                 fclose(asm_out);
1377                         }
1378                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1379                         copy_file(asm_out, in);
1380                         if (in == preprocessed_in) {
1381                                 int pp_result = pclose(preprocessed_in);
1382                                 if (pp_result != EXIT_SUCCESS) {
1383                                         /* remove output in error case */
1384                                         if (out != stdout)
1385                                                 unlink(outname);
1386                                         return pp_result;
1387                                 }
1388                         }
1389                         if (asm_out != out) {
1390                                 fclose(asm_out);
1391                         }
1392                 }
1393
1394                 if (mode == Compile)
1395                         continue;
1396
1397                 /* if we're here then we have preprocessed assembly */
1398                 filename = asm_tempfile;
1399                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1400
1401                 /* assemble */
1402                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1403                         char        temp[1024];
1404                         const char *filename_o;
1405                         if (mode == CompileAssemble) {
1406                                 fclose(out);
1407                                 filename_o = outname;
1408                         } else {
1409                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1410                                 fclose(tempf);
1411                                 filename_o = temp;
1412                         }
1413
1414                         assemble(filename_o, filename);
1415
1416                         size_t len = strlen(filename_o) + 1;
1417                         filename = obstack_copy(&file_obst, filename_o, len);
1418                         filetype = FILETYPE_OBJECT;
1419                 }
1420
1421                 /* ok we're done here, process next file */
1422                 file->name = filename;
1423                 file->type = filetype;
1424         }
1425
1426         if (result != EXIT_SUCCESS) {
1427                 if (out != stdout)
1428                         unlink(outname);
1429                 return result;
1430         }
1431
1432         /* link program file */
1433         if (mode == CompileAssembleLink) {
1434                 obstack_1grow(&ldflags_obst, '\0');
1435                 const char *flags = obstack_finish(&ldflags_obst);
1436
1437                 /* construct commandline */
1438                 obstack_printf(&file_obst, "%s", LINKER);
1439                 for (file_list_entry_t *entry = files; entry != NULL;
1440                                 entry = entry->next) {
1441                         if (entry->type != FILETYPE_OBJECT)
1442                                 continue;
1443
1444                         add_flag(&file_obst, "%s", entry->name);
1445                 }
1446
1447                 add_flag(&file_obst, "-o");
1448                 add_flag(&file_obst, outname);
1449                 obstack_printf(&file_obst, "%s", flags);
1450                 obstack_1grow(&file_obst, '\0');
1451
1452                 char *commandline = obstack_finish(&file_obst);
1453
1454                 if (verbose) {
1455                         puts(commandline);
1456                 }
1457                 int err = system(commandline);
1458                 if (err != EXIT_SUCCESS) {
1459                         fprintf(stderr, "linker reported an error\n");
1460                         exit(1);
1461                 }
1462         }
1463
1464         obstack_free(&cppflags_obst, NULL);
1465         obstack_free(&ldflags_obst, NULL);
1466         obstack_free(&file_obst, NULL);
1467
1468         exit_mangle();
1469         exit_ast2firm();
1470         exit_parser();
1471         exit_ast();
1472         exit_lexer();
1473         exit_typehash();
1474         exit_types();
1475         exit_tokens();
1476         exit_symbol_table();
1477         return 0;
1478 }