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 = _C89 | _ANSI | _C99 | _GNUC;
 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         /* hack for now... */
 544         if (strstr(argv[0], "pptest") != NULL) {
 545                 extern int pptest_main(int argc, char **argv);
 546                 return pptest_main(argc, argv);
 547         }
 548
 549         obstack_init(&cppflags_obst);
 550         obstack_init(&ldflags_obst);
 551         obstack_init(&file_obst);
 552
 553 #define GET_ARG_AFTER(def, args)                                             \
 554         def = &arg[sizeof(args)-1];                                              \
 555         if(def[0] == '\0') {                                                     \
 556                 ++i;                                                                 \
 557                 if(i >= argc) {                                                      \
 558                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 559                         argument_errors = true;                                          \
 560                         break;                                                           \
 561                 }                                                                    \
 562                 def = argv[i];                                                       \
 563                 if(def[0] == '-' && def[1] != '\0') {                                \
 564                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 565                         argument_errors = true;                                          \
 566                         continue;                                                        \
 567                 }                                                                    \
 568         }
 569
 570 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 571
 572         /* early options parsing (find out optimisation level) */
 573         for(int i = 1; i < argc; ++i) {
 574                 const char *arg = argv[i];
 575                 if(arg[0] != '-')
 576                         continue;
 577
 578                 const char *option = &arg[1];
 579                 if(option[0] == 'O') {
 580                         sscanf(&option[1], "%d", &opt_level);
 581                 }
 582         }
 583
 584         /* apply optimisation level */
 585         switch(opt_level) {
 586         case 0:
 587                 set_option("no-opt");
 588                 break;
 589         case 1:
 590                 set_option("no-inline");
 591                 break;
 592         default:
 593         case 4:
 594                 set_option("strict-aliasing");
 595                 /* use_builtins = true; */
 596                 /* fallthrough */
 597         case 3:
 598                 set_option("cond-eval");
 599                 set_option("if-conv");
 600                 /* fallthrough */
 601         case 2:
 602                 set_option("inline");
 603                 set_option("deconv");
 604                 set_be_option("omitfp");
 605                 break;
 606         }
 607
 608 #ifdef __APPLE__
 609         /* Darwin expects the stack to be aligned to 16byte boundary */
 610         firm_be_option("ia32-stackalign=4");
 611 #endif
 612
 613         /* parse rest of options */
 614         lang_standard_t standard        = STANDARD_DEFAULT;
 615         lang_features_t features_on     = 0;
 616         lang_features_t features_off    = 0;
 617         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 618         bool            help_displayed  = false;
 619         bool            argument_errors = false;
 620         for(int i = 1; i < argc; ++i) {
 621                 const char *arg = argv[i];
 622                 if (arg[0] == '-' && arg[1] != '\0') {
 623                         /* an option */
 624                         const char *option = &arg[1];
 625                         if(option[0] == 'o') {
 626                                 GET_ARG_AFTER(outname, "-o");
 627                         } else if(option[0] == 'g') {
 628                                 set_be_option("debuginfo=stabs");
 629                                 set_be_option("omitfp=no");
 630                                 set_be_option("ia32-nooptcc=yes");
 631                         } else if(SINGLE_OPTION('c')) {
 632                                 mode = CompileAssemble;
 633                         } else if(SINGLE_OPTION('E')) {
 634                                 mode = PreprocessOnly;
 635                         } else if(SINGLE_OPTION('S')) {
 636                                 mode = Compile;
 637                         } else if(option[0] == 'O') {
 638                                 continue;
 639                         } else if(option[0] == 'I') {
 640                                 const char *opt;
 641                                 GET_ARG_AFTER(opt, "-I");
 642                                 add_flag(&cppflags_obst, "-I%s", opt);
 643                         } else if(option[0] == 'D') {
 644                                 const char *opt;
 645                                 GET_ARG_AFTER(opt, "-D");
 646                                 add_flag(&cppflags_obst, "-D%s", opt);
 647                         } else if(option[0] == 'U') {
 648                                 const char *opt;
 649                                 GET_ARG_AFTER(opt, "-U");
 650                                 add_flag(&cppflags_obst, "-U%s", opt);
 651                         } else if(option[0] == 'l') {
 652                                 const char *opt;
 653                                 GET_ARG_AFTER(opt, "-l");
 654                                 add_flag(&ldflags_obst, "-l%s", opt);
 655                         } else if(option[0] == 'L') {
 656                                 const char *opt;
 657                                 GET_ARG_AFTER(opt, "-L");
 658                                 add_flag(&ldflags_obst, "-L%s", opt);
 659                         } else if(SINGLE_OPTION('v')) {
 660                                 verbose = 1;
 661                         } else if(SINGLE_OPTION('w')) {
 662                                 memset(&warning, 0, sizeof(warning));
 663                         } else if(option[0] == 'x') {
 664                                 const char *opt;
 665                                 GET_ARG_AFTER(opt, "-x");
 666                                 forced_filetype = get_filetype_from_string(opt);
 667                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 668                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 669                                         argument_errors = true;
 670                                 }
 671                         } else if (streq(option, "M")) {
 672                                 mode = PreprocessOnly;
 673                                 add_flag(&cppflags_obst, "-M");
 674                         } else if (streq(option, "MMD") ||
 675                                    streq(option, "MD")) {
 676                             construct_dep_target = true;
 677                                 add_flag(&cppflags_obst, "-%s", option);
 678                         } else if(streq(option, "MM")  ||
 679                                    streq(option, "MP")) {
 680                                 add_flag(&cppflags_obst, "-%s", option);
 681                         } else if (streq(option, "MT") ||
 682                                    streq(option, "MQ") ||
 683                                    streq(option, "MF")) {
 684                                 const char *opt;
 685                                 GET_ARG_AFTER(opt, "-MT");
 686                                 add_flag(&cppflags_obst, "-%s", option);
 687                                 add_flag(&cppflags_obst, "%s", opt);
 688                         } else if (streq(option, "pipe")) {
 689                                 /* here for gcc compatibility */
 690                         } else if (option[0] == 'f') {
 691                                 char const *orig_opt;
 692                                 GET_ARG_AFTER(orig_opt, "-f");
 693
 694                                 if (strstart(orig_opt, "align-loops=") ||
 695                                     strstart(orig_opt, "align-jumps=") ||
 696                                     strstart(orig_opt, "align-functions=")) {
 697                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 698                                 } else {
 699                                         char const *opt         = orig_opt;
 700                                         bool        truth_value = true;
 701                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 702                                                 truth_value = false;
 703                                                 opt += 3;
 704                                         }
 705
 706                                         if (streq(opt, "dollars-in-identifiers")) {
 707                                                 allow_dollar_in_symbol = truth_value;
 708                                         } if (streq(opt, "builtins")) {
 709                                                 use_builtins = truth_value;
 710                                         } else if (streq(opt, "short-wchar")) {
 711                                                 opt_short_wchar_t = truth_value;
 712                                         } else if (streq(opt, "syntax-only")) {
 713                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 714                                         } else if (streq(opt, "omit-frame-pointer")) {
 715                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 716                                         } else if (streq(opt, "strength-reduce")) {
 717                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 718                                         } else if (streq(opt, "fast-math")               ||
 719                                                    streq(opt, "jump-tables")             ||
 720                                                    streq(opt, "unroll-loops")            ||
 721                                                    streq(opt, "expensive-optimizations") ||
 722                                                    streq(opt, "common")                  ||
 723                                                    streq(opt, "PIC")                     ||
 724                                                    streq(opt, "align-loops")             ||
 725                                                    streq(opt, "align-jumps")             ||
 726                                                    streq(opt, "align-functions")) {
 727                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 728                                         } else {
 729                                                 int res = firm_option(orig_opt);
 730                                                 if (res == 0) {
 731                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 732                                                                 orig_opt);
 733                                                         argument_errors = true;
 734                                                         continue;
 735                                                 } else if (res == -1) {
 736                                                         help_displayed = true;
 737                                                 }
 738                                         }
 739                                 }
 740                         } else if (option[0] == 'b') {
 741                                 const char *opt;
 742                                 GET_ARG_AFTER(opt, "-b");
 743                                 int res = firm_be_option(opt);
 744                                 if (res == 0) {
 745                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 746                                                 opt);
 747                                         argument_errors = true;
 748                                 } else if (res == -1) {
 749                                         help_displayed = true;
 750                                 } else if (strstart(opt, "isa=")) {
 751                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 752                                 }
 753                         } else if (option[0] == 'W') {
 754                                 if (strstart(option + 1, "l,")) // a gcc-style linker option
 755                                 {
 756                                         const char *opt;
 757                                         GET_ARG_AFTER(opt, "-Wl,");
 758                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 759                                 }
 760                                 else set_warning_opt(&option[1]);
 761                         } else if(option[0] == 'm') {
 762                                 /* -m options */
 763                                 const char *opt;
 764                                 char arch_opt[64];
 765
 766                                 GET_ARG_AFTER(opt, "-m");
 767                                 if (strstart(opt, "arch=")) {
 768                                         GET_ARG_AFTER(opt, "-march=");
 769                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 770                                         int res = firm_be_option(arch_opt);
 771                                         if (res == 0)
 772                                                 argument_errors = true;
 773                                         else {
 774                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 775                                                 int res = firm_be_option(arch_opt);
 776                                                 if (res == 0)
 777                                                         argument_errors = true;
 778                                         }
 779                                 } else if (strstart(opt, "tune=")) {
 780                                         GET_ARG_AFTER(opt, "-mtune=");
 781                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%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, "cpu=")) {
 786                                         GET_ARG_AFTER(opt, "-mcpu=");
 787                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 788                                         int res = firm_be_option(arch_opt);
 789                                         if (res == 0)
 790                                                 argument_errors = true;
 791                                 } else if (strstart(opt, "fpmath=")) {
 792                                         GET_ARG_AFTER(opt, "-mfpmath=");
 793                                         if (streq(opt, "387"))
 794                                                 opt = "x87";
 795                                         else if (streq(opt, "sse"))
 796                                                 opt = "sse2";
 797                                         else {
 798                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 799                                                 argument_errors = true;
 800                                         }
 801                                         if(!argument_errors) {
 802                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 803                                                 int res = firm_be_option(arch_opt);
 804                                                 if (res == 0)
 805                                                         argument_errors = true;
 806                                         }
 807                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 808                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 809                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 810                                         int res = firm_be_option(arch_opt);
 811                                         if (res == 0)
 812                                                 argument_errors = true;
 813                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 814                                         set_be_option("omitleaffp=1");
 815                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 816                                         set_be_option("omitleaffp=0");
 817                                 } else {
 818                                         char *endptr;
 819                                         long int value = strtol(opt, &endptr, 10);
 820                                         if (*endptr != '\0') {
 821                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 822                                                 argument_errors = true;
 823                                         }
 824                                         if (value != 16 && value != 32 && value != 64) {
 825                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 826                                                 argument_errors = true;
 827                                         } else {
 828                                                 machine_size = (unsigned int)value;
 829                                         }
 830                                 }
 831                         } else if (streq(option, "pg")) {
 832                                 set_be_option("gprof");
 833                                 add_flag(&ldflags_obst, "-pg");
 834                         } else if (streq(option, "pedantic") ||
 835                                    streq(option, "ansi")) {
 836                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 837                         } else if (streq(option, "shared")) {
 838                                 add_flag(&ldflags_obst, "-shared");
 839                         } else if (strstart(option, "std=")) {
 840                                 const char *const o = &option[4];
 841                                 standard =
 842                                         streq(o, "c++98")          ? STANDARD_CXX98   :
 843                                         streq(o, "c89")            ? STANDARD_C89     :
 844                                         streq(o, "c99")            ? STANDARD_C99     :
 845                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
 846                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
 847                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
 848                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
 849                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
 850                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
 851                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
 852                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
 853                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
 854                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
 855                         } else if (streq(option, "version")) {
 856                                 print_cparser_version();
 857                         } else if (option[0] == '-') {
 858                                 /* double dash option */
 859                                 ++option;
 860                                 if (streq(option, "gcc")) {
 861                                         features_on  |=  _GNUC;
 862                                         features_off &= ~_GNUC;
 863                                 } else if (streq(option, "no-gcc")) {
 864                                         features_on  &= ~_GNUC;
 865                                         features_off |=  _GNUC;
 866                                 } else if (streq(option, "ms")) {
 867                                         features_on  |=  _MS;
 868                                         features_off &= ~_MS;
 869                                 } else if (streq(option, "no-ms")) {
 870                                         features_on  &= ~_MS;
 871                                         features_off |=  _MS;
 872                                 } else if (streq(option, "signed-chars")) {
 873                                         char_is_signed = true;
 874                                 } else if (streq(option, "unsigned-chars")) {
 875                                         char_is_signed = false;
 876                                 } else if (streq(option, "strict")) {
 877                                         strict_mode = true;
 878                                 } else if (streq(option, "lextest")) {
 879                                         mode = LexTest;
 880                                 } else if (streq(option, "benchmark")) {
 881                                         mode = BenchmarkParser;
 882                                 } else if (streq(option, "print-ast")) {
 883                                         mode = PrintAst;
 884                                 } else if (streq(option, "print-implicit-cast")) {
 885                                         print_implicit_casts = true;
 886                                 } else if (streq(option, "print-parenthesis")) {
 887                                         print_parenthesis = true;
 888                                 } else if (streq(option, "print-fluffy")) {
 889                                         mode = PrintFluffy;
 890                                 } else if (streq(option, "print-caml")) {
 891                                         mode = PrintCaml;
 892                                 } else if (streq(option, "version")) {
 893                                         print_cparser_version();
 894                                         exit(EXIT_SUCCESS);
 895                                 } else if (streq(option, "dump-function")) {
 896                                         ++i;
 897                                         if(i >= argc) {
 898                                                 fprintf(stderr, "error: "
 899                                                         "expected argument after '--dump-function'\n");
 900                                                 argument_errors = true;
 901                                                 break;
 902                                         }
 903                                         dumpfunction = argv[i];
 904                                         mode         = CompileDump;
 905                                 } else {
 906                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
 907                                         argument_errors = true;
 908                                 }
 909                         } else {
 910                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
 911                                 argument_errors = true;
 912                         }
 913                 } else {
 914                         filetype_t type = forced_filetype;
 915                         if (type == FILETYPE_AUTODETECT) {
 916                                 if (streq(arg, "-")) {
 917                                         /* - implicitly means C source file */
 918                                         type = FILETYPE_C;
 919                                 } else {
 920                                         const char *suffix = strrchr(arg, '.');
 921                                         /* Ensure there is at least one char before the suffix */
 922                                         if (suffix != NULL && suffix != arg) {
 923                                                 ++suffix;
 924                                                 type =
 925                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
 926                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
 927                                                         streq(suffix, "c")   ? FILETYPE_C                      :
 928                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
 929                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
 930                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
 931                                                         streq(suffix, "h")   ? FILETYPE_C                      :
 932                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
 933                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
 934                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
 935                                                         FILETYPE_AUTODETECT;
 936                                         }
 937                                 }
 938
 939                                 if (type == FILETYPE_AUTODETECT) {
 940                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
 941                                         continue;
 942                                 }
 943                         }
 944
 945                         file_list_entry_t *entry
 946                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
 947                         memset(entry, 0, sizeof(entry[0]));
 948                         entry->name = arg;
 949                         entry->type = type;
 950
 951                         if (last_file != NULL) {
 952                                 last_file->next = entry;
 953                         } else {
 954                                 files = entry;
 955                         }
 956                         last_file = entry;
 957                 }
 958         }
 959
 960         if (files == NULL) {
 961                 fprintf(stderr, "error: no input files specified\n");
 962                 argument_errors = true;
 963         }
 964
 965         if (help_displayed) {
 966                 return !argument_errors;
 967         }
 968         if (argument_errors) {
 969                 usage(argv[0]);
 970                 return 1;
 971         }
 972
 973         /* we do the lowering in ast2firm */
 974         firm_opt.lower_bitfields = FALSE;
 975
 976         gen_firm_init();
 977         init_symbol_table();
 978         init_types();
 979         init_typehash();
 980         init_basic_types();
 981         init_lexer();
 982         init_ast();
 983         init_parser();
 984         init_ast2firm();
 985
 986         if (construct_dep_target) {
 987                 if (outname != 0 && strlen(outname) >= 2) {
 988                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
 989                 } else {
 990                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
 991                 }
 992         } else {
 993                 dep_target[0] = '\0';
 994         }
 995
 996         char outnamebuf[4096];
 997         if (outname == NULL) {
 998                 const char *filename = files->name;
 999
1000                 switch(mode) {
1001                 case BenchmarkParser:
1002                 case PrintAst:
1003                 case PrintFluffy:
1004                 case PrintCaml:
1005                 case LexTest:
1006                 case PreprocessOnly:
1007                 case ParseOnly:
1008                         outname = "-";
1009                         break;
1010                 case Compile:
1011                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1012                         outname = outnamebuf;
1013                         break;
1014                 case CompileAssemble:
1015                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1016                         outname = outnamebuf;
1017                         break;
1018                 case CompileDump:
1019                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1020                                         ".vcg");
1021                         outname = outnamebuf;
1022                         break;
1023                 case CompileAssembleLink:
1024 #ifdef _WIN32
1025                         outname = "a.exe";
1026 #else
1027                         outname = "a.out";
1028 #endif
1029                         break;
1030                 }
1031         }
1032
1033         assert(outname != NULL);
1034
1035         FILE *out;
1036         if (streq(outname, "-")) {
1037                 out = stdout;
1038         } else {
1039                 out = fopen(outname, "w");
1040                 if(out == NULL) {
1041                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1042                                         strerror(errno));
1043                         return 1;
1044                 }
1045         }
1046
1047         file_list_entry_t *file;
1048         for (file = files; file != NULL; file = file->next) {
1049                 char        asm_tempfile[1024];
1050                 const char *filename = file->name;
1051                 filetype_t  filetype = file->type;
1052
1053                 if (filetype == FILETYPE_OBJECT)
1054                         continue;
1055
1056                 FILE *in = NULL;
1057                 if (mode == LexTest) {
1058                         if (in == NULL)
1059                                 in = open_file(filename);
1060                         lextest(in, filename);
1061                         fclose(in);
1062                         exit(EXIT_SUCCESS);
1063                 }
1064
1065                 FILE *preprocessed_in = NULL;
1066                 switch (filetype) {
1067                         case FILETYPE_C:         filetype = FILETYPE_PREPROCESSED_C;         goto preprocess;
1068                         case FILETYPE_CXX:       filetype = FILETYPE_PREPROCESSED_CXX;       goto preprocess;
1069                         case FILETYPE_ASSEMBLER: filetype = FILETYPE_PREPROCESSED_ASSEMBLER; goto preprocess;
1070 preprocess:
1071                                 /* no support for input on FILE* yet */
1072                                 if (in != NULL)
1073                                         panic("internal compiler error: in for preprocessor != NULL");
1074
1075                                 preprocessed_in = preprocess(filename);
1076                                 if (mode == PreprocessOnly) {
1077                                         copy_file(out, preprocessed_in);
1078                                         int result = pclose(preprocessed_in);
1079                                         fclose(out);
1080                                         return result;
1081                                 }
1082
1083                                 in = preprocessed_in;
1084                                 break;
1085
1086                         default:
1087                                 break;
1088                 }
1089
1090                 FILE *asm_out;
1091                 if(mode == Compile) {
1092                         asm_out = out;
1093                 } else {
1094                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1095                 }
1096
1097                 if (in == NULL)
1098                         in = open_file(filename);
1099
1100                 /* preprocess and compile */
1101                 if (filetype == FILETYPE_PREPROCESSED_C) {
1102                         char const* invalid_mode;
1103                         switch (standard) {
1104                                 case STANDARD_ANSI:
1105                                 case STANDARD_C89:   c_mode = _C89;                break;
1106                                 /* TODO ^v determine difference between these two */
1107                                 case STANDARD_C90:   c_mode = _C89;                break;
1108                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1109                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1110
1111 default_c_warn:
1112                                         fprintf(stderr,
1113                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1114                                                         invalid_mode);
1115                                         /* FALLTHROUGH */
1116                                 case STANDARD_DEFAULT:
1117                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1118
1119                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1120                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1121                         }
1122                         goto do_parsing;
1123                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1124                         char const* invalid_mode;
1125                         switch (standard) {
1126                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1127                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1128                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1129                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1130                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1131
1132                                 case STANDARD_ANSI:
1133                                 case STANDARD_CXX98: c_mode = _CXX; break;
1134
1135 default_cxx_warn:
1136                                         fprintf(stderr,
1137                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1138                                                         invalid_mode);
1139                                 case STANDARD_DEFAULT:
1140                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1141                         }
1142
1143 do_parsing:
1144                         c_mode |= features_on;
1145                         c_mode &= ~features_off;
1146                         init_tokens();
1147                         translation_unit_t *const unit = do_parsing(in, filename);
1148
1149                         /* prints the AST even if errors occurred */
1150                         if (mode == PrintAst) {
1151                                 type_set_output(out);
1152                                 ast_set_output(out);
1153                                 print_ast(unit);
1154                         }
1155
1156                         if(error_count > 0) {
1157                                 /* parsing failed because of errors */
1158                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1159                                         warning_count);
1160                                 result = EXIT_FAILURE;
1161                                 continue;
1162                         } else if(warning_count > 0) {
1163                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1164                         }
1165
1166                         if (in == preprocessed_in) {
1167                                 int pp_result = pclose(preprocessed_in);
1168                                 if (pp_result != EXIT_SUCCESS) {
1169                                         exit(EXIT_FAILURE);
1170                                 }
1171                         }
1172
1173                         if(mode == BenchmarkParser) {
1174                                 return result;
1175                         } else if(mode == PrintFluffy) {
1176                                 write_fluffy_decls(out, unit);
1177                                 continue;
1178                         } else if (mode == PrintCaml) {
1179                                 write_caml_decls(out, unit);
1180                                 continue;
1181                         }
1182
1183                         translation_unit_to_firm(unit);
1184
1185                         if (mode == ParseOnly) {
1186                                 continue;
1187                         }
1188
1189                         if (mode == CompileDump) {
1190                                 /* find irg */
1191                                 ident    *id     = new_id_from_str(dumpfunction);
1192                                 ir_graph *irg    = NULL;
1193                                 int       n_irgs = get_irp_n_irgs();
1194                                 for(int i = 0; i < n_irgs; ++i) {
1195                                         ir_graph *tirg   = get_irp_irg(i);
1196                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1197                                         if(irg_id == id) {
1198                                                 irg = tirg;
1199                                                 break;
1200                                         }
1201                                 }
1202
1203                                 if(irg == NULL) {
1204                                         fprintf(stderr, "No graph for function '%s' found\n",
1205                                                 dumpfunction);
1206                                         exit(1);
1207                                 }
1208
1209                                 dump_ir_block_graph_file(irg, out);
1210                                 fclose(out);
1211                                 exit(0);
1212                         }
1213
1214                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1215                                         have_const_functions);
1216                         if (asm_out != out) {
1217                                 fclose(asm_out);
1218                         }
1219                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1220                         copy_file(asm_out, in);
1221                         if (in == preprocessed_in) {
1222                                 int pp_result = pclose(preprocessed_in);
1223                                 if (pp_result != EXIT_SUCCESS) {
1224                                         return pp_result;
1225                                 }
1226                         }
1227                         if(asm_out != out) {
1228                                 fclose(asm_out);
1229                         }
1230                 }
1231
1232                 if (mode == Compile)
1233                         continue;
1234
1235                 /* if we're here then we have preprocessed assembly */
1236                 filename = asm_tempfile;
1237                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1238
1239                 /* assemble */
1240                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1241                         char        temp[1024];
1242                         const char *filename_o;
1243                         if(mode == CompileAssemble) {
1244                                 fclose(out);
1245                                 filename_o = outname;
1246                         } else {
1247                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1248                                 fclose(tempf);
1249                                 filename_o = temp;
1250                         }
1251
1252                         assemble(filename_o, filename);
1253
1254                         size_t len = strlen(filename_o) + 1;
1255                         filename = obstack_copy(&file_obst, filename_o, len);
1256                         filetype = FILETYPE_OBJECT;
1257                 }
1258
1259                 /* ok we're done here, process next file */
1260                 file->name = filename;
1261                 file->type = filetype;
1262         }
1263
1264         if (result != EXIT_SUCCESS)
1265                 return result;
1266
1267         /* link program file */
1268         if(mode == CompileAssembleLink) {
1269                 obstack_1grow(&ldflags_obst, '\0');
1270                 const char *flags = obstack_finish(&ldflags_obst);
1271
1272                 /* construct commandline */
1273                 obstack_printf(&file_obst, "%s", LINKER);
1274                 for (file_list_entry_t *entry = files; entry != NULL;
1275                                 entry = entry->next) {
1276                         if (entry->type != FILETYPE_OBJECT)
1277                                 continue;
1278
1279                         add_flag(&file_obst, "%s", entry->name);
1280                 }
1281
1282                 add_flag(&file_obst, "-o");
1283                 add_flag(&file_obst, outname);
1284                 obstack_printf(&file_obst, "%s", flags);
1285                 obstack_1grow(&file_obst, '\0');
1286
1287                 char *commandline = obstack_finish(&file_obst);
1288
1289                 if(verbose) {
1290                         puts(commandline);
1291                 }
1292                 int err = system(commandline);
1293                 if(err != EXIT_SUCCESS) {
1294                         fprintf(stderr, "linker reported an error\n");
1295                         exit(1);
1296                 }
1297         }
1298
1299         obstack_free(&cppflags_obst, NULL);
1300         obstack_free(&ldflags_obst, NULL);
1301         obstack_free(&file_obst, NULL);
1302
1303         exit_ast2firm();
1304         exit_parser();
1305         exit_ast();
1306         exit_lexer();
1307         exit_typehash();
1308         exit_types();
1309         exit_tokens();
1310         exit_symbol_table();
1311         return 0;
1312 }