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
  54 #else
  55 #include <unistd.h>
  56 #define HAVE_MKSTEMP
  57 #endif
  58
  59 #ifndef WITH_LIBCORE
  60 #define WITH_LIBCORE
  61 #endif
  62
  63 #include <libfirm/firm.h>
  64 #include <libfirm/be.h>
  65
  66 #include "lexer.h"
  67 #include "token_t.h"
  68 #include "types.h"
  69 #include "type_hash.h"
  70 #include "parser.h"
  71 #include "ast2firm.h"
  72 #include "diagnostic.h"
  73 #include "lang_features.h"
  74 #include "driver/firm_opt.h"
  75 #include "driver/firm_cmdline.h"
  76 #include "adt/error.h"
  77 #include "write_fluffy.h"
  78 #include "write_caml.h"
  79 #include "revision.h"
  80 #include "warning.h"
  81
  82 #ifndef PREPROCESSOR
  83 #ifdef __APPLE__
  84 #define PREPROCESSOR "gcc -E -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int -U__SIZE_TYPE__ -D__SIZE_TYPE__=unsigned\\ long -m32 -U__STRICT_ANSI__"
  85 #else
  86 #define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int -U__SIZE_TYPE__ -D__SIZE_TYPE__=unsigned\\ long -m32 -U__STRICT_ANSI__"
  87 #endif
  88 #endif
  89
  90 #ifndef LINKER
  91 #define LINKER    "gcc -m32"
  92 #endif
  93
  94 #ifndef ASSEMBLER
  95 #ifdef __APPLE__
  96 #define ASSEMBLER "gcc -c -xassembler"
  97 #else
  98 #define ASSEMBLER "as --32"
  99 #endif
 100 #endif
 101
 102 /** The current c mode/dialect. */
 103 lang_features_t c_mode;
 104
 105 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
 106 unsigned int machine_size = 32;
 107
 108 /** true if the char type is signed. */
 109 bool char_is_signed = true;
 110
 111 /** true for strict language checking. */
 112 bool strict_mode = false;
 113
 114 /** use builtins for some libc functions */
 115 bool use_builtins = false;
 116
 117 /** we have extern function with const attribute. */
 118 bool have_const_functions = false;
 119
 120 /* to switch on printing of implicit casts */
 121 extern bool print_implicit_casts;
 122
 123 /* to switch on printing of parenthesis to indicate operator precedence */
 124 extern bool print_parenthesis;
 125
 126 static int             verbose;
 127 static struct obstack  cppflags_obst, ldflags_obst;
 128 static char            dep_target[1024];
 129 static const char     *outname;
 130
 131 typedef struct file_list_entry_t file_list_entry_t;
 132
 133 typedef enum filetype_t {
 134         FILETYPE_AUTODETECT,
 135         FILETYPE_C,
 136         FILETYPE_PREPROCESSED_C,
 137         FILETYPE_CXX,
 138         FILETYPE_PREPROCESSED_CXX,
 139         FILETYPE_ASSEMBLER,
 140         FILETYPE_PREPROCESSED_ASSEMBLER,
 141         FILETYPE_OBJECT,
 142         FILETYPE_UNKNOWN
 143 } filetype_t;
 144
 145 struct file_list_entry_t {
 146         const char        *name; /**< filename or NULL for stdin */
 147         filetype_t         type;
 148         file_list_entry_t *next;
 149 };
 150
 151 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 152 /**
 153  * Debug printf implementation.
 154  *
 155  * @param fmt  printf style format parameter
 156  */
 157 void dbg_printf(const char *fmt, ...)
 158 {
 159         va_list list;
 160
 161         if (firm_dump.debug_print) {
 162                 va_start(list, fmt);
 163                 vprintf(fmt, list);
 164                 va_end(list);
 165         }  /* if */
 166 }
 167 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 168
 169 static void initialize_firm(void)
 170 {
 171         firm_early_init();
 172
 173         dump_consts_local(1);
 174         dump_keepalive_edges(1);
 175 }
 176
 177 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 178                             const char *newext)
 179 {
 180         size_t last_dot = 0xffffffff;
 181         size_t i = 0;
 182
 183         if(inputname == NULL) {
 184                 snprintf(buf, buflen, "a%s", newext);
 185                 return;
 186         }
 187
 188         for(const char *c = inputname; *c != 0; ++c) {
 189                 if(*c == '.')
 190                         last_dot = i;
 191                 ++i;
 192         }
 193         if(last_dot == 0xffffffff)
 194                 last_dot = i;
 195
 196         if(last_dot >= buflen)
 197                 panic("filename too long");
 198         memcpy(buf, inputname, last_dot);
 199
 200         size_t extlen = strlen(newext) + 1;
 201         if(extlen + last_dot >= buflen)
 202                 panic("filename too long");
 203         memcpy(buf+last_dot, newext, extlen);
 204 }
 205
 206 #include "builtins.h"
 207
 208 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 209 {
 210         start_parsing();
 211
 212         if (use_builtins) {
 213                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 214                 parse();
 215         }
 216
 217         lexer_open_stream(in, input_name);
 218         parse();
 219
 220         translation_unit_t *unit = finish_parsing();
 221         return unit;
 222 }
 223
 224 static void lextest(FILE *in, const char *fname)
 225 {
 226         lexer_open_stream(in, fname);
 227
 228         do {
 229                 lexer_next_preprocessing_token();
 230                 print_token(stdout, &lexer_token);
 231                 puts("");
 232         } while(lexer_token.type != T_EOF);
 233 }
 234
 235 static void add_flag(struct obstack *obst, const char *format, ...)
 236 {
 237         va_list ap;
 238         va_start(ap, format);
 239
 240         char buf[4096];
 241         vsnprintf(buf, sizeof(buf), format, ap);
 242
 243         /* escape stuff... */
 244         obstack_1grow(obst, ' ');
 245         for (char *c = buf; *c != '\0'; ++c) {
 246                 switch(*c) {
 247                 case '"':
 248                 case '\'':
 249                 case '`':
 250                 case ' ':
 251                 case '\t':
 252                 case '\n':
 253                 case '\r':
 254                 case '\\':
 255                 case '$':
 256                 case '(':
 257                 case ')':
 258                         obstack_1grow(obst, '\\');
 259                         /* fallthrough */
 260                 default:
 261                         obstack_1grow(obst, *c);
 262                         break;
 263                 }
 264         }
 265
 266         va_end(ap);
 267 }
 268
 269 static FILE *preprocess(const char *fname)
 270 {
 271         obstack_1grow(&cppflags_obst, '\0');
 272         const char *flags = obstack_finish(&cppflags_obst);
 273
 274         obstack_printf(&cppflags_obst, "%s", PREPROCESSOR);
 275         if (dep_target[0] != '\0') {
 276                 add_flag(&cppflags_obst, "-MF");
 277                 add_flag(&cppflags_obst, "%s", dep_target);
 278                 if (outname != NULL) {
 279                                 add_flag(&cppflags_obst, "-MQ");
 280                                 add_flag(&cppflags_obst, "%s", outname);
 281                 }
 282         }
 283         if (flags[0] != '\0') {
 284                 obstack_printf(&cppflags_obst, " %s", flags);
 285         }
 286         add_flag(&cppflags_obst, "%s", fname);
 287
 288         obstack_1grow(&cppflags_obst, '\0');
 289         const char *buf = obstack_finish(&cppflags_obst);
 290         if(verbose) {
 291                 puts(buf);
 292         }
 293
 294         FILE *f = popen(buf, "r");
 295         if(f == NULL) {
 296                 fprintf(stderr, "invoking preprocessor failed\n");
 297                 exit(1);
 298         }
 299
 300         return f;
 301 }
 302
 303 static void assemble(const char *out, const char *in)
 304 {
 305         char buf[4096];
 306
 307         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 308         if(verbose) {
 309                 puts(buf);
 310         }
 311
 312         int err = system(buf);
 313         if(err != 0) {
 314                 fprintf(stderr, "assembler reported an error\n");
 315                 exit(1);
 316         }
 317 }
 318
 319 static const char *try_dir(const char *dir)
 320 {
 321         if(dir == NULL)
 322                 return dir;
 323         if(access(dir, R_OK | W_OK | X_OK) == 0)
 324                 return dir;
 325         return NULL;
 326 }
 327
 328 static const char *get_tempdir(void)
 329 {
 330         static const char *tmpdir = NULL;
 331
 332         if(tmpdir != NULL)
 333                 return tmpdir;
 334
 335         if(tmpdir == NULL)
 336                 tmpdir = try_dir(getenv("TMPDIR"));
 337         if(tmpdir == NULL)
 338                 tmpdir = try_dir(getenv("TMP"));
 339         if(tmpdir == NULL)
 340                 tmpdir = try_dir(getenv("TEMP"));
 341
 342 #ifdef P_tmpdir
 343         if(tmpdir == NULL)
 344                 tmpdir = try_dir(P_tmpdir);
 345 #endif
 346
 347         if(tmpdir == NULL)
 348                 tmpdir = try_dir("/var/tmp");
 349         if(tmpdir == NULL)
 350                 tmpdir = try_dir("/usr/tmp");
 351         if(tmpdir == NULL)
 352                 tmpdir = try_dir("/tmp");
 353
 354         if(tmpdir == NULL)
 355                 tmpdir = ".";
 356
 357         return tmpdir;
 358 }
 359
 360 #ifndef HAVE_MKSTEMP
 361 /* cheap and nasty mkstemp replacement */
 362 static int mkstemp(char *templ)
 363 {
 364         mktemp(templ);
 365         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 366 }
 367 #endif
 368
 369 /**
 370  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 371  * during linking (like glibc/gnu ld do for tmpnam)...
 372  */
 373 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 374 {
 375         const char *tempdir = get_tempdir();
 376
 377         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 378
 379         int fd = mkstemp(buffer);
 380         if(fd == -1) {
 381                 fprintf(stderr, "couldn't create temporary file: %s\n",
 382                         strerror(errno));
 383                 exit(1);
 384         }
 385         FILE *out = fdopen(fd, "w");
 386         if(out == NULL) {
 387                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 388                 exit(1);
 389         }
 390
 391         return out;
 392 }
 393
 394 /**
 395  * Do the necessary lowering for compound parameters.
 396  */
 397 void lower_compound_params(void)
 398 {
 399         lower_params_t params;
 400
 401         params.def_ptr_alignment    = 4;
 402         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 403         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 404         params.find_pointer_type    = NULL;
 405         params.ret_compound_in_regs = NULL;
 406         lower_calls_with_compounds(&params);
 407 }
 408
 409 typedef enum compile_mode_t {
 410         BenchmarkParser,
 411         PreprocessOnly,
 412         ParseOnly,
 413         Compile,
 414         CompileDump,
 415         CompileAssemble,
 416         CompileAssembleLink,
 417         LexTest,
 418         PrintAst,
 419         PrintFluffy,
 420         PrintCaml
 421 } compile_mode_t;
 422
 423 static void usage(const char *argv0)
 424 {
 425         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 426 }
 427
 428 static void print_cparser_version(void) {
 429         firm_version_t ver;
 430         firm_get_version(&ver);
 431
 432         printf("cparser (%s) using libFirm (%u.%u",
 433                 cparser_REVISION, ver.major, ver.minor);
 434         if(ver.revision[0] != 0) {
 435                 putchar(' ');
 436                 fputs(ver.revision, stdout);
 437         }
 438         if(ver.build[0] != 0) {
 439                 putchar(' ');
 440                 fputs(ver.build, stdout);
 441         }
 442         puts(")\n");
 443 }
 444
 445 static void set_be_option(const char *arg)
 446 {
 447         int res = firm_be_option(arg);
 448         (void) res;
 449         assert(res);
 450 }
 451
 452 static void set_option(const char *arg)
 453 {
 454         int res = firm_option(arg);
 455         (void) res;
 456         assert(res);
 457 }
 458
 459 static void copy_file(FILE *dest, FILE *input)
 460 {
 461         char buf[16384];
 462
 463         while (!feof(input) && !ferror(dest)) {
 464                 size_t read = fread(buf, 1, sizeof(buf), input);
 465                 if(fwrite(buf, 1, read, dest) != read) {
 466                         perror("couldn't write output");
 467                 }
 468         }
 469 }
 470
 471 static inline bool streq(char const* a, char const* b)
 472 {
 473         return strcmp(a, b) == 0;
 474 }
 475
 476 static inline bool strstart(char const* str, char const* start)
 477 {
 478         do {
 479                 if (*start == '\0')
 480                         return true;
 481         } while (*str++ == *start++);
 482         return false;
 483 }
 484
 485 static FILE *open_file(const char *filename)
 486 {
 487         if (streq(filename, "-")) {
 488                 return stdin;
 489         }
 490
 491         FILE *in = fopen(filename, "r");
 492         if(in == NULL) {
 493                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 494                                 strerror(errno));
 495                 exit(1);
 496         }
 497
 498         return in;
 499 }
 500
 501 static filetype_t get_filetype_from_string(const char *string)
 502 {
 503         if (streq(string, "c") || streq(string, "c-header"))
 504                 return FILETYPE_C;
 505         if (streq(string, "c++") || streq(string, "c++-header"))
 506                 return FILETYPE_CXX;
 507         if (streq(string, "assembler"))
 508                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 509         if (streq(string, "assembler-with-cpp"))
 510                 return FILETYPE_ASSEMBLER;
 511         if (streq(string, "none"))
 512                 return FILETYPE_AUTODETECT;
 513
 514         return FILETYPE_UNKNOWN;
 515 }
 516
 517 typedef enum lang_standard_t {
 518         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 519         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 520         STANDARD_C89,     /* ISO C90 (sic) */
 521         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 522         STANDARD_C99,     /* ISO C99 */
 523         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 524         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 525         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 526         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 527 } lang_standard_t;
 528
 529 int main(int argc, char **argv)
 530 {
 531         initialize_firm();
 532
 533         const char        *dumpfunction         = NULL;
 534         compile_mode_t     mode                 = CompileAssembleLink;
 535         int                opt_level            = 1;
 536         int                result               = EXIT_SUCCESS;
 537         char               cpu_arch[16]         = "ia32";
 538         file_list_entry_t *files                = NULL;
 539         file_list_entry_t *last_file            = NULL;
 540         bool               construct_dep_target = false;
 541         struct obstack     file_obst;
 542
 543         obstack_init(&cppflags_obst);
 544         obstack_init(&ldflags_obst);
 545         obstack_init(&file_obst);
 546
 547 #define GET_ARG_AFTER(def, args)                                             \
 548         def = &arg[sizeof(args)-1];                                              \
 549         if(def[0] == '\0') {                                                     \
 550                 ++i;                                                                 \
 551                 if(i >= argc) {                                                      \
 552                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 553                         argument_errors = true;                                          \
 554                         break;                                                           \
 555                 }                                                                    \
 556                 def = argv[i];                                                       \
 557                 if(def[0] == '-' && def[1] != '\0') {                                \
 558                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 559                         argument_errors = true;                                          \
 560                         continue;                                                        \
 561                 }                                                                    \
 562         }
 563
 564 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 565
 566         /* early options parsing (find out optimisation level) */
 567         for(int i = 1; i < argc; ++i) {
 568                 const char *arg = argv[i];
 569                 if(arg[0] != '-')
 570                         continue;
 571
 572                 const char *option = &arg[1];
 573                 if(option[0] == 'O') {
 574                         sscanf(&option[1], "%d", &opt_level);
 575                 }
 576         }
 577
 578         /* apply optimisation level */
 579         switch(opt_level) {
 580         case 0:
 581                 set_option("no-opt");
 582                 break;
 583         case 1:
 584                 set_option("no-inline");
 585                 break;
 586         default:
 587         case 4:
 588                 set_option("strict-aliasing");
 589                 /* use_builtins = true; */
 590                 /* fallthrough */
 591         case 3:
 592                 set_option("cond-eval");
 593                 set_option("if-conv");
 594                 /* fallthrough */
 595         case 2:
 596                 set_option("inline");
 597                 set_option("deconv");
 598                 set_be_option("omitfp");
 599                 break;
 600         }
 601
 602 #ifdef __APPLE__
 603         /* Darwin expects the stack to be aligned to 16byte boundary */
 604         firm_be_option("ia32-stackalign=4");
 605 #endif
 606
 607         /* parse rest of options */
 608         lang_standard_t standard        = STANDARD_DEFAULT;
 609         lang_features_t features_on     = 0;
 610         lang_features_t features_off    = 0;
 611         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 612         bool            help_displayed  = false;
 613         bool            argument_errors = false;
 614         for(int i = 1; i < argc; ++i) {
 615                 const char *arg = argv[i];
 616                 if (arg[0] == '-' && arg[1] != '\0') {
 617                         /* an option */
 618                         const char *option = &arg[1];
 619                         if(option[0] == 'o') {
 620                                 GET_ARG_AFTER(outname, "-o");
 621                         } else if(option[0] == 'g') {
 622                                 set_be_option("debuginfo=stabs");
 623                                 set_be_option("omitfp=no");
 624                                 set_be_option("ia32-nooptcc=yes");
 625                         } else if(SINGLE_OPTION('c')) {
 626                                 mode = CompileAssemble;
 627                         } else if(SINGLE_OPTION('E')) {
 628                                 mode = PreprocessOnly;
 629                         } else if(SINGLE_OPTION('S')) {
 630                                 mode = Compile;
 631                         } else if(option[0] == 'O') {
 632                                 continue;
 633                         } else if(option[0] == 'I') {
 634                                 const char *opt;
 635                                 GET_ARG_AFTER(opt, "-I");
 636                                 add_flag(&cppflags_obst, "-I%s", opt);
 637                         } else if(option[0] == 'D') {
 638                                 const char *opt;
 639                                 GET_ARG_AFTER(opt, "-D");
 640                                 add_flag(&cppflags_obst, "-D%s", opt);
 641                         } else if(option[0] == 'U') {
 642                                 const char *opt;
 643                                 GET_ARG_AFTER(opt, "-U");
 644                                 add_flag(&cppflags_obst, "-U%s", opt);
 645                         } else if(option[0] == 'l') {
 646                                 const char *opt;
 647                                 GET_ARG_AFTER(opt, "-l");
 648                                 add_flag(&ldflags_obst, "-l%s", opt);
 649                         } else if(option[0] == 'L') {
 650                                 const char *opt;
 651                                 GET_ARG_AFTER(opt, "-L");
 652                                 add_flag(&ldflags_obst, "-L%s", opt);
 653                         } else if(SINGLE_OPTION('v')) {
 654                                 verbose = 1;
 655                         } else if(SINGLE_OPTION('w')) {
 656                                 memset(&warning, 0, sizeof(warning));
 657                         } else if(option[0] == 'x') {
 658                                 const char *opt;
 659                                 GET_ARG_AFTER(opt, "-x");
 660                                 forced_filetype = get_filetype_from_string(opt);
 661                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 662                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 663                                         argument_errors = true;
 664                                 }
 665                         } else if (streq(option, "M")) {
 666                                 mode = PreprocessOnly;
 667                                 add_flag(&cppflags_obst, "-M");
 668                         } else if (streq(option, "MMD") ||
 669                                    streq(option, "MD")) {
 670                             construct_dep_target = true;
 671                                 add_flag(&cppflags_obst, "-%s", option);
 672                         } else if(streq(option, "MM")  ||
 673                                    streq(option, "MP")) {
 674                                 add_flag(&cppflags_obst, "-%s", option);
 675                         } else if (streq(option, "MT") ||
 676                                    streq(option, "MQ") ||
 677                                    streq(option, "MF")) {
 678                                 const char *opt;
 679                                 GET_ARG_AFTER(opt, "-MT");
 680                                 add_flag(&cppflags_obst, "-%s", option);
 681                                 add_flag(&cppflags_obst, "%s", opt);
 682                         } else if (streq(option, "pipe")) {
 683                                 /* here for gcc compatibility */
 684                         } else if (option[0] == 'f') {
 685                                 char const *orig_opt;
 686                                 GET_ARG_AFTER(orig_opt, "-f");
 687
 688                                 if (strstart(orig_opt, "align-loops=") ||
 689                                     strstart(orig_opt, "align-jumps=") ||
 690                                     strstart(orig_opt, "align-functions=")) {
 691                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 692                                 } else {
 693                                         char const *opt         = orig_opt;
 694                                         bool        truth_value = true;
 695                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 696                                                 truth_value = false;
 697                                                 opt += 3;
 698                                         }
 699
 700                                         if (streq(opt, "dollars-in-identifiers")) {
 701                                                 allow_dollar_in_symbol = truth_value;
 702                                         } if (streq(opt, "builtins")) {
 703                                                 use_builtins = truth_value;
 704                                         } else if (streq(opt, "short-wchar")) {
 705                                                 opt_short_wchar_t = truth_value;
 706                                         } else if (streq(opt, "syntax-only")) {
 707                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 708                                         } else if (streq(opt, "omit-frame-pointer")) {
 709                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 710                                         } else if (streq(opt, "strength-reduce")) {
 711                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 712                                         } else if (streq(opt, "fast-math")               ||
 713                                                    streq(opt, "jump-tables")             ||
 714                                                    streq(opt, "unroll-loops")            ||
 715                                                    streq(opt, "expensive-optimizations") ||
 716                                                    streq(opt, "common")                  ||
 717                                                    streq(opt, "PIC")                     ||
 718                                                    streq(opt, "align-loops")             ||
 719                                                    streq(opt, "align-jumps")             ||
 720                                                    streq(opt, "align-functions")) {
 721                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 722                                         } else {
 723                                                 int res = firm_option(orig_opt);
 724                                                 if (res == 0) {
 725                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 726                                                                 orig_opt);
 727                                                         argument_errors = true;
 728                                                         continue;
 729                                                 } else if (res == -1) {
 730                                                         help_displayed = true;
 731                                                 }
 732                                         }
 733                                 }
 734                         } else if (option[0] == 'b') {
 735                                 const char *opt;
 736                                 GET_ARG_AFTER(opt, "-b");
 737                                 int res = firm_be_option(opt);
 738                                 if (res == 0) {
 739                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 740                                                 opt);
 741                                         argument_errors = true;
 742                                 } else if (res == -1) {
 743                                         help_displayed = true;
 744                                 } else if (strstart(opt, "isa=")) {
 745                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 746                                 }
 747                         } else if (option[0] == 'W') {
 748                                 if (strstart(option + 1, "l,")) // a gcc-style linker option
 749                                 {
 750                                         const char *opt;
 751                                         GET_ARG_AFTER(opt, "-Wl,");
 752                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 753                                 }
 754                                 else set_warning_opt(&option[1]);
 755                         } else if(option[0] == 'm') {
 756                                 /* -m options */
 757                                 const char *opt;
 758                                 char arch_opt[64];
 759
 760                                 GET_ARG_AFTER(opt, "-m");
 761                                 if (strstart(opt, "arch=")) {
 762                                         GET_ARG_AFTER(opt, "-march=");
 763                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 764                                         int res = firm_be_option(arch_opt);
 765                                         if (res == 0)
 766                                                 argument_errors = true;
 767                                         else {
 768                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 769                                                 int res = firm_be_option(arch_opt);
 770                                                 if (res == 0)
 771                                                         argument_errors = true;
 772                                         }
 773                                 } else if (strstart(opt, "tune=")) {
 774                                         GET_ARG_AFTER(opt, "-mtune=");
 775                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 776                                         int res = firm_be_option(arch_opt);
 777                                         if (res == 0)
 778                                                 argument_errors = true;
 779                                 } else if (strstart(opt, "cpu=")) {
 780                                         GET_ARG_AFTER(opt, "-mcpu=");
 781                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 782                                         int res = firm_be_option(arch_opt);
 783                                         if (res == 0)
 784                                                 argument_errors = true;
 785                                 } else if (strstart(opt, "fpmath=")) {
 786                                         GET_ARG_AFTER(opt, "-mfpmath=");
 787                                         if (streq(opt, "387"))
 788                                                 opt = "x87";
 789                                         else if (streq(opt, "sse"))
 790                                                 opt = "sse2";
 791                                         else {
 792                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 793                                                 argument_errors = true;
 794                                         }
 795                                         if(!argument_errors) {
 796                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 797                                                 int res = firm_be_option(arch_opt);
 798                                                 if (res == 0)
 799                                                         argument_errors = true;
 800                                         }
 801                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 802                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 803                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 804                                         int res = firm_be_option(arch_opt);
 805                                         if (res == 0)
 806                                                 argument_errors = true;
 807                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 808                                         set_be_option("omitleaffp=1");
 809                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 810                                         set_be_option("omitleaffp=0");
 811                                 } else {
 812                                         char *endptr;
 813                                         long int value = strtol(opt, &endptr, 10);
 814                                         if (*endptr != '\0') {
 815                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 816                                                 argument_errors = true;
 817                                         }
 818                                         if (value != 16 && value != 32 && value != 64) {
 819                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 820                                                 argument_errors = true;
 821                                         } else {
 822                                                 machine_size = (unsigned int)value;
 823                                         }
 824                                 }
 825                         } else if (streq(option, "pg")) {
 826                                 set_be_option("gprof");
 827                                 add_flag(&ldflags_obst, "-pg");
 828                         } else if (streq(option, "pedantic") ||
 829                                    streq(option, "ansi")) {
 830                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 831                         } else if (streq(option, "shared")) {
 832                                 add_flag(&ldflags_obst, "-shared");
 833                         } else if (strstart(option, "std=")) {
 834                                 const char *const o = &option[4];
 835                                 standard =
 836                                         streq(o, "c++98")          ? STANDARD_CXX98   :
 837                                         streq(o, "c89")            ? STANDARD_C89     :
 838                                         streq(o, "c99")            ? STANDARD_C99     :
 839                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
 840                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
 841                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
 842                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
 843                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
 844                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
 845                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
 846                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
 847                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
 848                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
 849                         } else if (streq(option, "version")) {
 850                                 print_cparser_version();
 851                         } else if (option[0] == '-') {
 852                                 /* double dash option */
 853                                 ++option;
 854                                 if (streq(option, "gcc")) {
 855                                         features_on  |=  _GNUC;
 856                                         features_off &= ~_GNUC;
 857                                 } else if (streq(option, "no-gcc")) {
 858                                         features_on  &= ~_GNUC;
 859                                         features_off |=  _GNUC;
 860                                 } else if (streq(option, "ms")) {
 861                                         features_on  |=  _MS;
 862                                         features_off &= ~_MS;
 863                                 } else if (streq(option, "no-ms")) {
 864                                         features_on  &= ~_MS;
 865                                         features_off |=  _MS;
 866                                 } else if (streq(option, "signed-chars")) {
 867                                         char_is_signed = true;
 868                                 } else if (streq(option, "unsigned-chars")) {
 869                                         char_is_signed = false;
 870                                 } else if (streq(option, "strict")) {
 871                                         strict_mode = true;
 872                                 } else if (streq(option, "lextest")) {
 873                                         mode = LexTest;
 874                                 } else if (streq(option, "benchmark")) {
 875                                         mode = BenchmarkParser;
 876                                 } else if (streq(option, "print-ast")) {
 877                                         mode = PrintAst;
 878                                 } else if (streq(option, "print-implicit-cast")) {
 879                                         print_implicit_casts = true;
 880                                 } else if (streq(option, "print-parenthesis")) {
 881                                         print_parenthesis = true;
 882                                 } else if (streq(option, "print-fluffy")) {
 883                                         mode = PrintFluffy;
 884                                 } else if (streq(option, "print-caml")) {
 885                                         mode = PrintCaml;
 886                                 } else if (streq(option, "version")) {
 887                                         print_cparser_version();
 888                                         exit(EXIT_SUCCESS);
 889                                 } else if (streq(option, "dump-function")) {
 890                                         ++i;
 891                                         if(i >= argc) {
 892                                                 fprintf(stderr, "error: "
 893                                                         "expected argument after '--dump-function'\n");
 894                                                 argument_errors = true;
 895                                                 break;
 896                                         }
 897                                         dumpfunction = argv[i];
 898                                         mode         = CompileDump;
 899                                 } else {
 900                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 901                                         argument_errors = true;
 902                                 }
 903                         } else {
 904                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 905                                 argument_errors = true;
 906                         }
 907                 } else {
 908                         filetype_t type = forced_filetype;
 909                         if (type == FILETYPE_AUTODETECT) {
 910                                 if (streq(arg, "-")) {
 911                                         /* - implicitly means C source file */
 912                                         type = FILETYPE_C;
 913                                 } else {
 914                                         const char *suffix = strrchr(arg, '.');
 915                                         /* Ensure there is at least one char before the suffix */
 916                                         if (suffix != NULL && suffix != arg) {
 917                                                 ++suffix;
 918                                                 type =
 919                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
 920                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
 921                                                         streq(suffix, "c")   ? FILETYPE_C                      :
 922                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
 923                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
 924                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
 925                                                         streq(suffix, "h")   ? FILETYPE_C                      :
 926                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
 927                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
 928                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
 929                                                         FILETYPE_AUTODETECT;
 930                                         }
 931                                 }
 932
 933                                 if (type == FILETYPE_AUTODETECT) {
 934                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
 935                                         continue;
 936                                 }
 937                         }
 938
 939                         file_list_entry_t *entry
 940                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
 941                         memset(entry, 0, sizeof(entry[0]));
 942                         entry->name = arg;
 943                         entry->type = type;
 944
 945                         if (last_file != NULL) {
 946                                 last_file->next = entry;
 947                         } else {
 948                                 files = entry;
 949                         }
 950                         last_file = entry;
 951                 }
 952         }
 953
 954         if (files == NULL) {
 955                 fprintf(stderr, "error: no input files specified\n");
 956                 argument_errors = true;
 957         }
 958
 959         if (help_displayed) {
 960                 return !argument_errors;
 961         }
 962         if (argument_errors) {
 963                 usage(argv[0]);
 964                 return 1;
 965         }
 966
 967         /* we do the lowering in ast2firm */
 968         firm_opt.lower_bitfields = FALSE;
 969
 970         gen_firm_init();
 971         init_symbol_table();
 972         init_types();
 973         init_typehash();
 974         init_basic_types();
 975         init_lexer();
 976         init_ast();
 977         init_parser();
 978         init_ast2firm();
 979
 980         if (construct_dep_target) {
 981                 if (outname != 0 && strlen(outname) >= 2) {
 982                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
 983                 } else {
 984                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
 985                 }
 986         } else {
 987                 dep_target[0] = '\0';
 988         }
 989
 990         char outnamebuf[4096];
 991         if (outname == NULL) {
 992                 const char *filename = files->name;
 993
 994                 switch(mode) {
 995                 case BenchmarkParser:
 996                 case PrintAst:
 997                 case PrintFluffy:
 998                 case PrintCaml:
 999                 case LexTest:
1000                 case PreprocessOnly:
1001                 case ParseOnly:
1002                         outname = "-";
1003                         break;
1004                 case Compile:
1005                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1006                         outname = outnamebuf;
1007                         break;
1008                 case CompileAssemble:
1009                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1010                         outname = outnamebuf;
1011                         break;
1012                 case CompileDump:
1013                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1014                                         ".vcg");
1015                         outname = outnamebuf;
1016                         break;
1017                 case CompileAssembleLink:
1018 #ifdef _WIN32
1019                         outname = "a.exe";
1020 #else
1021                         outname = "a.out";
1022 #endif
1023                         break;
1024                 }
1025         }
1026
1027         assert(outname != NULL);
1028
1029         FILE *out;
1030         if (streq(outname, "-")) {
1031                 out = stdout;
1032         } else {
1033                 out = fopen(outname, "w");
1034                 if(out == NULL) {
1035                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1036                                         strerror(errno));
1037                         return 1;
1038                 }
1039         }
1040
1041         file_list_entry_t *file;
1042         for (file = files; file != NULL; file = file->next) {
1043                 char        asm_tempfile[1024];
1044                 const char *filename = file->name;
1045                 filetype_t  filetype = file->type;
1046
1047                 if (filetype == FILETYPE_OBJECT)
1048                         continue;
1049
1050                 FILE *in = NULL;
1051                 if (mode == LexTest) {
1052                         if (in == NULL)
1053                                 in = open_file(filename);
1054                         lextest(in, filename);
1055                         fclose(in);
1056                         exit(EXIT_SUCCESS);
1057                 }
1058
1059                 FILE *preprocessed_in = NULL;
1060                 switch (filetype) {
1061                         case FILETYPE_C:         filetype = FILETYPE_PREPROCESSED_C;         goto preprocess;
1062                         case FILETYPE_CXX:       filetype = FILETYPE_PREPROCESSED_CXX;       goto preprocess;
1063                         case FILETYPE_ASSEMBLER: filetype = FILETYPE_PREPROCESSED_ASSEMBLER; goto preprocess;
1064 preprocess:
1065                                 /* no support for input on FILE* yet */
1066                                 if (in != NULL)
1067                                         panic("internal compiler error: in for preprocessor != NULL");
1068
1069                                 preprocessed_in = preprocess(filename);
1070                                 if (mode == PreprocessOnly) {
1071                                         copy_file(out, preprocessed_in);
1072                                         int result = pclose(preprocessed_in);
1073                                         fclose(out);
1074                                         return result;
1075                                 }
1076
1077                                 in = preprocessed_in;
1078                                 break;
1079
1080                         default:
1081                                 break;
1082                 }
1083
1084                 FILE *asm_out;
1085                 if(mode == Compile) {
1086                         asm_out = out;
1087                 } else {
1088                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1089                 }
1090
1091                 if (in == NULL)
1092                         in = open_file(filename);
1093
1094                 /* preprocess and compile */
1095                 if (filetype == FILETYPE_PREPROCESSED_C) {
1096                         char const* invalid_mode;
1097                         switch (standard) {
1098                                 case STANDARD_ANSI:
1099                                 case STANDARD_C89:   c_mode = _C89;                break;
1100                                 /* TODO ^v determine difference between these two */
1101                                 case STANDARD_C90:   c_mode = _C89;                break;
1102                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1103                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1104
1105 default_c_warn:
1106                                         fprintf(stderr,
1107                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1108                                                         invalid_mode);
1109                                         /* FALLTHROUGH */
1110                                 case STANDARD_DEFAULT:
1111                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1112
1113                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1114                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1115                         }
1116                         goto do_parsing;
1117                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1118                         char const* invalid_mode;
1119                         switch (standard) {
1120                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1121                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1122                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1123                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1124                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1125
1126                                 case STANDARD_ANSI:
1127                                 case STANDARD_CXX98: c_mode = _CXX; break;
1128
1129 default_cxx_warn:
1130                                         fprintf(stderr,
1131                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1132                                                         invalid_mode);
1133                                 case STANDARD_DEFAULT:
1134                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1135                         }
1136
1137 do_parsing:
1138                         c_mode |= features_on;
1139                         c_mode &= ~features_off;
1140                         init_tokens();
1141                         translation_unit_t *const unit = do_parsing(in, filename);
1142
1143                         /* prints the AST even if errors occurred */
1144                         if (mode == PrintAst) {
1145                                 type_set_output(out);
1146                                 ast_set_output(out);
1147                                 print_ast(unit);
1148                         }
1149
1150                         if(error_count > 0) {
1151                                 /* parsing failed because of errors */
1152                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1153                                         warning_count);
1154                                 result = EXIT_FAILURE;
1155                                 continue;
1156                         } else if(warning_count > 0) {
1157                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1158                         }
1159
1160                         if (in == preprocessed_in) {
1161                                 int pp_result = pclose(preprocessed_in);
1162                                 if (pp_result != EXIT_SUCCESS) {
1163                                         exit(EXIT_FAILURE);
1164                                 }
1165                         }
1166
1167                         if(mode == BenchmarkParser) {
1168                                 return result;
1169                         } else if(mode == PrintFluffy) {
1170                                 write_fluffy_decls(out, unit);
1171                                 continue;
1172                         } else if (mode == PrintCaml) {
1173                                 write_caml_decls(out, unit);
1174                                 continue;
1175                         }
1176
1177                         translation_unit_to_firm(unit);
1178
1179                         if (mode == ParseOnly) {
1180                                 continue;
1181                         }
1182
1183                         if (mode == CompileDump) {
1184                                 /* find irg */
1185                                 ident    *id     = new_id_from_str(dumpfunction);
1186                                 ir_graph *irg    = NULL;
1187                                 int       n_irgs = get_irp_n_irgs();
1188                                 for(int i = 0; i < n_irgs; ++i) {
1189                                         ir_graph *tirg   = get_irp_irg(i);
1190                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1191                                         if(irg_id == id) {
1192                                                 irg = tirg;
1193                                                 break;
1194                                         }
1195                                 }
1196
1197                                 if(irg == NULL) {
1198                                         fprintf(stderr, "No graph for function '%s' found\n",
1199                                                 dumpfunction);
1200                                         exit(1);
1201                                 }
1202
1203                                 dump_ir_block_graph_file(irg, out);
1204                                 fclose(out);
1205                                 exit(0);
1206                         }
1207
1208                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1209                                         have_const_functions);
1210                         if (asm_out != out) {
1211                                 fclose(asm_out);
1212                         }
1213                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1214                         copy_file(asm_out, in);
1215                         if (in == preprocessed_in) {
1216                                 int pp_result = pclose(preprocessed_in);
1217                                 if (pp_result != EXIT_SUCCESS) {
1218                                         return pp_result;
1219                                 }
1220                         }
1221                         if(asm_out != out) {
1222                                 fclose(asm_out);
1223                         }
1224                 }
1225
1226                 if (mode == Compile)
1227                         continue;
1228
1229                 /* if we're here then we have preprocessed assembly */
1230                 filename = asm_tempfile;
1231                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1232
1233                 /* assemble */
1234                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1235                         char        temp[1024];
1236                         const char *filename_o;
1237                         if(mode == CompileAssemble) {
1238                                 fclose(out);
1239                                 filename_o = outname;
1240                         } else {
1241                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1242                                 fclose(tempf);
1243                                 filename_o = temp;
1244                         }
1245
1246                         assemble(filename_o, filename);
1247
1248                         size_t len = strlen(filename_o) + 1;
1249                         filename = obstack_copy(&file_obst, filename_o, len);
1250                         filetype = FILETYPE_OBJECT;
1251                 }
1252
1253                 /* ok we're done here, process next file */
1254                 file->name = filename;
1255                 file->type = filetype;
1256         }
1257
1258         if (result != EXIT_SUCCESS)
1259                 return result;
1260
1261         /* link program file */
1262         if(mode == CompileAssembleLink) {
1263                 obstack_1grow(&ldflags_obst, '\0');
1264                 const char *flags = obstack_finish(&ldflags_obst);
1265
1266                 /* construct commandline */
1267                 obstack_printf(&file_obst, "%s", LINKER);
1268                 for (file_list_entry_t *entry = files; entry != NULL;
1269                                 entry = entry->next) {
1270                         if (entry->type != FILETYPE_OBJECT)
1271                                 continue;
1272
1273                         add_flag(&file_obst, "%s", entry->name);
1274                 }
1275
1276                 add_flag(&file_obst, "-o");
1277                 add_flag(&file_obst, outname);
1278                 obstack_printf(&file_obst, "%s", flags);
1279                 obstack_1grow(&file_obst, '\0');
1280
1281                 char *commandline = obstack_finish(&file_obst);
1282
1283                 if(verbose) {
1284                         puts(commandline);
1285                 }
1286                 int err = system(commandline);
1287                 if(err != EXIT_SUCCESS) {
1288                         fprintf(stderr, "linker reported an error\n");
1289                         exit(1);
1290                 }
1291         }
1292
1293         obstack_free(&cppflags_obst, NULL);
1294         obstack_free(&ldflags_obst, NULL);
1295         obstack_free(&file_obst, NULL);
1296
1297         exit_ast2firm();
1298         exit_parser();
1299         exit_ast();
1300         exit_lexer();
1301         exit_typehash();
1302         exit_types();
1303         exit_tokens();
1304         exit_symbol_table();
1305         return 0;
1306 }