nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #define _GNU_SOURCE
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <stdbool.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <assert.h>
  30
  31 #ifdef _WIN32
  32
  33 #include <fcntl.h>
  34 #include <io.h>
  35
  36 /* no eXecute on Win32 */
  37 #define X_OK 0
  38 #define W_OK 2
  39 #define R_OK 4
  40
  41 #define O_RDWR          _O_RDWR
  42 #define O_CREAT         _O_CREAT
  43 #define O_EXCL          _O_EXCL
  44 #define O_BINARY        _O_BINARY
  45
  46 /* remap some names, we are not in the POSIX world */
  47 #define access(fname, mode)      _access(fname, mode)
  48 #define mktemp(tmpl)             _mktemp(tmpl)
  49 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  50 #define fdopen(fd, mode)         _fdopen(fd, mode)
  51 #define popen(cmd, mode)         _popen(cmd, mode)
  52 #define pclose(file)             _pclose(file)
  53 #define unlink(filename)         _unlink(filename)
  54
  55 #else
  56 #include <unistd.h>
  57 #define HAVE_MKSTEMP
  58 #endif
  59
  60 #include <libfirm/firm.h>
  61 #include <libfirm/be.h>
  62
  63 #include "lexer.h"
  64 #include "token_t.h"
  65 #include "types.h"
  66 #include "type_hash.h"
  67 #include "parser.h"
  68 #include "type_t.h"
  69 #include "ast2firm.h"
  70 #include "diagnostic.h"
  71 #include "lang_features.h"
  72 #include "driver/firm_opt.h"
  73 #include "driver/firm_cmdline.h"
  74 #include "adt/error.h"
  75 #include "wrappergen/write_fluffy.h"
  76 #include "wrappergen/write_caml.h"
  77 #include "wrappergen/write_jna.h"
  78 #include "revision.h"
  79 #include "warning.h"
  80 #include "mangle.h"
  81
  82 #ifndef PREPROCESSOR
  83 #ifndef __WIN32__
  84 #define PREPROCESSOR "gcc -E -std=c99 -m32 -U__STRICT_ANSI__"
  85 #else
  86 #define PREPROCESSOR "cpp -std=c99 -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 unsigned int 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 atomic_type_kind_t wchar_atomic_kind = ATOMIC_TYPE_INT;
 121
 122 /* to switch on printing of implicit casts */
 123 extern bool print_implicit_casts;
 124
 125 /* to switch on printing of parenthesis to indicate operator precedence */
 126 extern bool print_parenthesis;
 127
 128 static int             verbose;
 129 static struct obstack  cppflags_obst, ldflags_obst;
 130 static char            dep_target[1024];
 131 static const char     *outname;
 132
 133 typedef struct file_list_entry_t file_list_entry_t;
 134
 135 typedef enum filetype_t {
 136         FILETYPE_AUTODETECT,
 137         FILETYPE_C,
 138         FILETYPE_PREPROCESSED_C,
 139         FILETYPE_CXX,
 140         FILETYPE_PREPROCESSED_CXX,
 141         FILETYPE_ASSEMBLER,
 142         FILETYPE_PREPROCESSED_ASSEMBLER,
 143         FILETYPE_OBJECT,
 144         FILETYPE_UNKNOWN
 145 } filetype_t;
 146
 147 struct file_list_entry_t {
 148         const char  *name; /**< filename or NULL for stdin */
 149         filetype_t   type;
 150         file_list_entry_t *next;
 151 };
 152
 153 static file_list_entry_t *temp_files;
 154
 155 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 156 /**
 157  * Debug printf implementation.
 158  *
 159  * @param fmt  printf style format parameter
 160  */
 161 void dbg_printf(const char *fmt, ...)
 162 {
 163         va_list list;
 164
 165         if (firm_dump.debug_print) {
 166                 va_start(list, fmt);
 167                 vprintf(fmt, list);
 168                 va_end(list);
 169         }  /* if */
 170 }
 171 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 172
 173 static void initialize_firm(void)
 174 {
 175         firm_early_init();
 176
 177         dump_consts_local(1);
 178         dump_keepalive_edges(1);
 179 }
 180
 181 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 182                             const char *newext)
 183 {
 184         if (inputname == NULL)
 185                 inputname = "a";
 186
 187         char const *const last_slash = strrchr(inputname, '/');
 188         char const *const filename   =
 189                 last_slash != NULL ? last_slash + 1 : inputname;
 190         char const *const last_dot   = strrchr(filename, '.');
 191         char const *const name_end   =
 192                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 193
 194         int const len = snprintf(buf, buflen, "%.*s%s",
 195                         (int)(name_end - filename), filename, newext);
 196 #ifdef _WIN32
 197         if (len < 0 || buflen <= (size_t)len)
 198 #else
 199         if (buflen <= (size_t)len)
 200 #endif
 201                 panic("filename too long");
 202 }
 203
 204 #include "builtins.h"
 205
 206 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 207 {
 208         start_parsing();
 209
 210         if (use_builtins) {
 211                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 212                 parse();
 213         }
 214
 215         lexer_open_stream(in, input_name);
 216         parse();
 217
 218         translation_unit_t *unit = finish_parsing();
 219         return unit;
 220 }
 221
 222 static void lextest(FILE *in, const char *fname)
 223 {
 224         lexer_open_stream(in, fname);
 225
 226         do {
 227                 lexer_next_preprocessing_token();
 228                 print_token(stdout, &lexer_token);
 229                 putchar('\n');
 230         } while (lexer_token.type != T_EOF);
 231 }
 232
 233 static void add_flag(struct obstack *obst, const char *format, ...)
 234 {
 235         char buf[65536];
 236         va_list ap;
 237
 238         va_start(ap, format);
 239 #ifdef _WIN32
 240         int len =
 241 #endif
 242                 vsnprintf(buf, sizeof(buf), format, ap);
 243         va_end(ap);
 244
 245         obstack_1grow(obst, ' ');
 246 #ifdef _WIN32
 247         obstack_1grow(obst, '"');
 248         obstack_grow(obst, buf, len);
 249         obstack_1grow(obst, '"');
 250 #else
 251         /* escape stuff... */
 252         for (char *c = buf; *c != '\0'; ++c) {
 253                 switch(*c) {
 254                 case ' ':
 255                 case '"':
 256                 case '$':
 257                 case '&':
 258                 case '(':
 259                 case ')':
 260                 case ';':
 261                 case '<':
 262                 case '>':
 263                 case '\'':
 264                 case '\\':
 265                 case '\n':
 266                 case '\r':
 267                 case '\t':
 268                 case '`':
 269                 case '|':
 270                         obstack_1grow(obst, '\\');
 271                         /* FALLTHROUGH */
 272                 default:
 273                         obstack_1grow(obst, *c);
 274                         break;
 275                 }
 276         }
 277 #endif
 278 }
 279
 280 static const char *type_to_string(type_t *type)
 281 {
 282         assert(type->kind == TYPE_ATOMIC);
 283         return get_atomic_kind_name(type->atomic.akind);
 284 }
 285
 286 static FILE *preprocess(const char *fname)
 287 {
 288         obstack_1grow(&cppflags_obst, '\0');
 289         const char *flags = obstack_finish(&cppflags_obst);
 290
 291         obstack_printf(&cppflags_obst, "%s", PREPROCESSOR);
 292
 293         /* setup default defines */
 294         add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 295         add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 296         add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 297         add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 298
 299         /* TODO hack... */
 300         add_flag(&cppflags_obst, "-D__builtin_abort=abort");
 301         add_flag(&cppflags_obst, "-D__builtin_abs=abs");
 302         add_flag(&cppflags_obst, "-D__builtin_exit=exit");
 303         add_flag(&cppflags_obst, "-D__builtin_malloc=malloc");
 304         add_flag(&cppflags_obst, "-D__builtin_memcmp=memcmp");
 305         add_flag(&cppflags_obst, "-D__builtin_memcpy=memcpy");
 306         add_flag(&cppflags_obst, "-D__builtin_memset=memset");
 307         add_flag(&cppflags_obst, "-D__builtin_strlen=strlen");
 308         add_flag(&cppflags_obst, "-D__builtin_strcmp=strcmp");
 309         add_flag(&cppflags_obst, "-D__builtin_strcpy=strcpy");
 310
 311         /* handle dependency generation */
 312         if (dep_target[0] != '\0') {
 313                 add_flag(&cppflags_obst, "-MF");
 314                 add_flag(&cppflags_obst, dep_target);
 315                 if (outname != NULL) {
 316                                 add_flag(&cppflags_obst, "-MQ");
 317                                 add_flag(&cppflags_obst, outname);
 318                 }
 319         }
 320         if (flags[0] != '\0') {
 321                 size_t len = strlen(flags);
 322                 obstack_1grow(&cppflags_obst, ' ');
 323                 obstack_grow(&cppflags_obst, flags, len);
 324         }
 325         add_flag(&cppflags_obst, fname);
 326
 327         obstack_1grow(&cppflags_obst, '\0');
 328         const char *buf = obstack_finish(&cppflags_obst);
 329         if (verbose) {
 330                 puts(buf);
 331         }
 332
 333         FILE *f = popen(buf, "r");
 334         if (f == NULL) {
 335                 fprintf(stderr, "invoking preprocessor failed\n");
 336                 exit(1);
 337         }
 338
 339         return f;
 340 }
 341
 342 static void assemble(const char *out, const char *in)
 343 {
 344         char buf[65536];
 345
 346         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 347         if (verbose) {
 348                 puts(buf);
 349         }
 350
 351         int err = system(buf);
 352         if (err != 0) {
 353                 fprintf(stderr, "assembler reported an error\n");
 354                 exit(1);
 355         }
 356 }
 357
 358 static void print_file_name(const char *file)
 359 {
 360         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 361
 362         obstack_1grow(&ldflags_obst, '\0');
 363         const char *flags = obstack_finish(&ldflags_obst);
 364
 365         /* construct commandline */
 366         obstack_printf(&ldflags_obst, "%s ", LINKER);
 367         obstack_printf(&ldflags_obst, "%s", flags);
 368         obstack_1grow(&ldflags_obst, '\0');
 369
 370         char *commandline = obstack_finish(&ldflags_obst);
 371
 372         if (verbose) {
 373                 puts(commandline);
 374         }
 375         int err = system(commandline);
 376         if (err != EXIT_SUCCESS) {
 377                 fprintf(stderr, "linker reported an error\n");
 378                 exit(1);
 379         }
 380 }
 381
 382 static const char *try_dir(const char *dir)
 383 {
 384         if (dir == NULL)
 385                 return dir;
 386         if (access(dir, R_OK | W_OK | X_OK) == 0)
 387                 return dir;
 388         return NULL;
 389 }
 390
 391 static const char *get_tempdir(void)
 392 {
 393         static const char *tmpdir = NULL;
 394
 395         if (tmpdir != NULL)
 396                 return tmpdir;
 397
 398         if (tmpdir == NULL)
 399                 tmpdir = try_dir(getenv("TMPDIR"));
 400         if (tmpdir == NULL)
 401                 tmpdir = try_dir(getenv("TMP"));
 402         if (tmpdir == NULL)
 403                 tmpdir = try_dir(getenv("TEMP"));
 404
 405 #ifdef P_tmpdir
 406         if (tmpdir == NULL)
 407                 tmpdir = try_dir(P_tmpdir);
 408 #endif
 409
 410         if (tmpdir == NULL)
 411                 tmpdir = try_dir("/var/tmp");
 412         if (tmpdir == NULL)
 413                 tmpdir = try_dir("/usr/tmp");
 414         if (tmpdir == NULL)
 415                 tmpdir = try_dir("/tmp");
 416
 417         if (tmpdir == NULL)
 418                 tmpdir = ".";
 419
 420         return tmpdir;
 421 }
 422
 423 #ifndef HAVE_MKSTEMP
 424 /* cheap and nasty mkstemp replacement */
 425 static int mkstemp(char *templ)
 426 {
 427         mktemp(templ);
 428         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 429 }
 430 #endif
 431
 432 /**
 433  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 434  * during linking (like glibc/gnu ld do for tmpnam)...
 435  */
 436 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 437 {
 438         const char *tempdir = get_tempdir();
 439
 440         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 441
 442         int fd = mkstemp(buffer);
 443         if (fd == -1) {
 444                 fprintf(stderr, "couldn't create temporary file: %s\n",
 445                         strerror(errno));
 446                 exit(1);
 447         }
 448         FILE *out = fdopen(fd, "w");
 449         if (out == NULL) {
 450                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 451                 exit(1);
 452         }
 453
 454         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 455         memset(entry, 0, sizeof(*entry));
 456
 457         size_t  name_len = strlen(buffer) + 1;
 458         char   *name     = malloc(name_len);
 459         memcpy(name, buffer, name_len);
 460         entry->name      = name;
 461
 462         entry->next = temp_files;
 463         temp_files  = entry;
 464
 465         return out;
 466 }
 467
 468 static void free_temp_files(void)
 469 {
 470         file_list_entry_t *entry = temp_files;
 471         file_list_entry_t *next;
 472         for ( ; entry != NULL; entry = next) {
 473                 next = entry->next;
 474
 475                 unlink(entry->name);
 476                 free((char*) entry->name);
 477                 free(entry);
 478         }
 479         temp_files = NULL;
 480 }
 481
 482 /**
 483  * Do the necessary lowering for compound parameters.
 484  */
 485 void lower_compound_params(void)
 486 {
 487         lower_params_t params;
 488
 489         params.def_ptr_alignment    = 4;
 490         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 491         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 492         params.find_pointer_type    = NULL;
 493         params.ret_compound_in_regs = NULL;
 494         lower_calls_with_compounds(&params);
 495 }
 496
 497 typedef enum compile_mode_t {
 498         BenchmarkParser,
 499         PreprocessOnly,
 500         ParseOnly,
 501         Compile,
 502         CompileDump,
 503         CompileAssemble,
 504         CompileAssembleLink,
 505         LexTest,
 506         PrintAst,
 507         PrintFluffy,
 508         PrintCaml,
 509         PrintJna
 510 } compile_mode_t;
 511
 512 static void usage(const char *argv0)
 513 {
 514         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 515 }
 516
 517 static void print_cparser_version(void)
 518 {
 519         printf("cparser (%s) using libFirm (%u.%u",
 520                cparser_REVISION, ir_get_version_major(),
 521                ir_get_version_minor());
 522
 523         const char *revision = ir_get_version_revision();
 524         if (revision[0] != 0) {
 525                 putchar(' ');
 526                 fputs(revision, stdout);
 527         }
 528
 529         const char *build = ir_get_version_build();
 530         if (build[0] != 0) {
 531                 putchar(' ');
 532                 fputs(build, stdout);
 533         }
 534         puts(")\n");
 535 }
 536
 537 static void set_be_option(const char *arg)
 538 {
 539         int res = firm_be_option(arg);
 540         (void) res;
 541         assert(res);
 542 }
 543
 544 static void set_option(const char *arg)
 545 {
 546         int res = firm_option(arg);
 547         (void) res;
 548         assert(res);
 549 }
 550
 551 static void copy_file(FILE *dest, FILE *input)
 552 {
 553         char buf[16384];
 554
 555         while (!feof(input) && !ferror(dest)) {
 556                 size_t read = fread(buf, 1, sizeof(buf), input);
 557                 if (fwrite(buf, 1, read, dest) != read) {
 558                         perror("couldn't write output");
 559                 }
 560         }
 561 }
 562
 563 static inline bool streq(char const* a, char const* b)
 564 {
 565         return strcmp(a, b) == 0;
 566 }
 567
 568 static inline bool strstart(char const* str, char const* start)
 569 {
 570         do {
 571                 if (*start == '\0')
 572                         return true;
 573         } while (*str++ == *start++);
 574         return false;
 575 }
 576
 577 static FILE *open_file(const char *filename)
 578 {
 579         if (streq(filename, "-")) {
 580                 return stdin;
 581         }
 582
 583         FILE *in = fopen(filename, "r");
 584         if (in == NULL) {
 585                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 586                                 strerror(errno));
 587                 exit(1);
 588         }
 589
 590         return in;
 591 }
 592
 593 static filetype_t get_filetype_from_string(const char *string)
 594 {
 595         if (streq(string, "c") || streq(string, "c-header"))
 596                 return FILETYPE_C;
 597         if (streq(string, "c++") || streq(string, "c++-header"))
 598                 return FILETYPE_CXX;
 599         if (streq(string, "assembler"))
 600                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 601         if (streq(string, "assembler-with-cpp"))
 602                 return FILETYPE_ASSEMBLER;
 603         if (streq(string, "none"))
 604                 return FILETYPE_AUTODETECT;
 605
 606         return FILETYPE_UNKNOWN;
 607 }
 608
 609 static void init_os_support(void)
 610 {
 611         /* OS option must be set to the backend */
 612         switch (firm_opt.os_support) {
 613         case OS_SUPPORT_MINGW:
 614                 set_be_option("ia32-gasmode=mingw");
 615                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 616                 break;
 617         case OS_SUPPORT_LINUX:
 618                 set_be_option("ia32-gasmode=elf");
 619                 break;
 620         case OS_SUPPORT_MACHO:
 621                 set_be_option("ia32-gasmode=macho");
 622                 set_be_option("ia32-stackalign=4");
 623                 set_be_option("pic");
 624                 break;
 625         }
 626 }
 627
 628 typedef enum lang_standard_t {
 629         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 630         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 631         STANDARD_C89,     /* ISO C90 (sic) */
 632         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 633         STANDARD_C99,     /* ISO C99 */
 634         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 635         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 636         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 637         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 638 } lang_standard_t;
 639
 640 int main(int argc, char **argv)
 641 {
 642         initialize_firm();
 643
 644         const char        *dumpfunction         = NULL;
 645         const char        *print_file_name_file = NULL;
 646         compile_mode_t     mode                 = CompileAssembleLink;
 647         int                opt_level            = 1;
 648         int                result               = EXIT_SUCCESS;
 649         char               cpu_arch[16]         = "ia32";
 650         file_list_entry_t *files                = NULL;
 651         file_list_entry_t *last_file            = NULL;
 652         bool               construct_dep_target = false;
 653         struct obstack     file_obst;
 654
 655         atexit(free_temp_files);
 656
 657         /* hack for now... */
 658         if (strstr(argv[0], "pptest") != NULL) {
 659                 extern int pptest_main(int argc, char **argv);
 660                 return pptest_main(argc, argv);
 661         }
 662
 663         obstack_init(&cppflags_obst);
 664         obstack_init(&ldflags_obst);
 665         obstack_init(&file_obst);
 666
 667 #define GET_ARG_AFTER(def, args)                                             \
 668         def = &arg[sizeof(args)-1];                                              \
 669         if (def[0] == '\0') {                                                     \
 670                 ++i;                                                                 \
 671                 if (i >= argc) {                                                      \
 672                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 673                         argument_errors = true;                                          \
 674                         break;                                                           \
 675                 }                                                                    \
 676                 def = argv[i];                                                       \
 677                 if (def[0] == '-' && def[1] != '\0') {                                \
 678                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 679                         argument_errors = true;                                          \
 680                         continue;                                                        \
 681                 }                                                                    \
 682         }
 683
 684 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 685
 686         /* early options parsing (find out optimisation level and OS) */
 687         for (int i = 1; i < argc; ++i) {
 688                 const char *arg = argv[i];
 689                 if (arg[0] != '-')
 690                         continue;
 691
 692                 const char *option = &arg[1];
 693                 if (option[0] == 'O') {
 694                         sscanf(&option[1], "%d", &opt_level);
 695                 }
 696                 if (strcmp(arg, "-fwin32") == 0) {
 697                         firm_opt.os_support = OS_SUPPORT_MINGW;
 698                 } else if (strcmp(arg, "-fmac") == 0) {
 699                         firm_opt.os_support = OS_SUPPORT_MACHO;
 700                 } else if (strcmp(arg, "-flinux") == 0) {
 701                         firm_opt.os_support = OS_SUPPORT_LINUX;
 702                 }
 703         }
 704
 705         /* set target/os specific stuff */
 706         init_os_support();
 707
 708         /* apply optimisation level */
 709         switch(opt_level) {
 710         case 0:
 711                 set_option("no-opt");
 712                 break;
 713         case 1:
 714                 set_option("no-inline");
 715                 break;
 716         default:
 717         case 4:
 718                 set_option("strict-aliasing");
 719                 /* use_builtins = true; */
 720                 /* fallthrough */
 721         case 3:
 722                 set_option("cond-eval");
 723                 set_option("if-conv");
 724                 /* fallthrough */
 725         case 2:
 726                 set_option("inline");
 727                 set_option("deconv");
 728                 set_be_option("omitfp");
 729                 break;
 730         }
 731
 732         /* parse rest of options */
 733         lang_standard_t standard        = STANDARD_DEFAULT;
 734         unsigned        features_on     = 0;
 735         unsigned        features_off    = 0;
 736         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 737         bool            help_displayed  = false;
 738         bool            argument_errors = false;
 739         for (int i = 1; i < argc; ++i) {
 740                 const char *arg = argv[i];
 741                 if (arg[0] == '-' && arg[1] != '\0') {
 742                         /* an option */
 743                         const char *option = &arg[1];
 744                         if (option[0] == 'o') {
 745                                 GET_ARG_AFTER(outname, "-o");
 746                         } else if (option[0] == 'g') {
 747                                 set_be_option("debuginfo=stabs");
 748                                 set_be_option("omitfp=no");
 749                                 set_be_option("ia32-nooptcc=yes");
 750                         } else if (SINGLE_OPTION('c')) {
 751                                 mode = CompileAssemble;
 752                         } else if (SINGLE_OPTION('E')) {
 753                                 mode = PreprocessOnly;
 754                         } else if (SINGLE_OPTION('S')) {
 755                                 mode = Compile;
 756                         } else if (option[0] == 'O') {
 757                                 continue;
 758                         } else if (option[0] == 'I') {
 759                                 const char *opt;
 760                                 GET_ARG_AFTER(opt, "-I");
 761                                 add_flag(&cppflags_obst, "-I%s", opt);
 762                         } else if (option[0] == 'D') {
 763                                 const char *opt;
 764                                 GET_ARG_AFTER(opt, "-D");
 765                                 add_flag(&cppflags_obst, "-D%s", opt);
 766                         } else if (option[0] == 'U') {
 767                                 const char *opt;
 768                                 GET_ARG_AFTER(opt, "-U");
 769                                 add_flag(&cppflags_obst, "-U%s", opt);
 770                         } else if (option[0] == 'l') {
 771                                 const char *opt;
 772                                 GET_ARG_AFTER(opt, "-l");
 773                                 add_flag(&ldflags_obst, "-l%s", opt);
 774                         } else if (option[0] == 'L') {
 775                                 const char *opt;
 776                                 GET_ARG_AFTER(opt, "-L");
 777                                 add_flag(&ldflags_obst, "-L%s", opt);
 778                         } else if (SINGLE_OPTION('v')) {
 779                                 verbose = 1;
 780                         } else if (SINGLE_OPTION('w')) {
 781                                 memset(&warning, 0, sizeof(warning));
 782                         } else if (option[0] == 'x') {
 783                                 const char *opt;
 784                                 GET_ARG_AFTER(opt, "-x");
 785                                 forced_filetype = get_filetype_from_string(opt);
 786                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 787                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 788                                         argument_errors = true;
 789                                 }
 790                         } else if (streq(option, "M")) {
 791                                 mode = PreprocessOnly;
 792                                 add_flag(&cppflags_obst, "-M");
 793                         } else if (streq(option, "MMD") ||
 794                                    streq(option, "MD")) {
 795                             construct_dep_target = true;
 796                                 add_flag(&cppflags_obst, "-%s", option);
 797                         } else if (streq(option, "MM")  ||
 798                                    streq(option, "MP")) {
 799                                 add_flag(&cppflags_obst, "-%s", option);
 800                         } else if (streq(option, "MT") ||
 801                                    streq(option, "MQ") ||
 802                                    streq(option, "MF")) {
 803                                 const char *opt;
 804                                 GET_ARG_AFTER(opt, "-MT");
 805                                 add_flag(&cppflags_obst, "-%s", option);
 806                                 add_flag(&cppflags_obst, "%s", opt);
 807                         } else if (streq(option, "include")) {
 808                                 const char *opt;
 809                                 GET_ARG_AFTER(opt, "-include");
 810                                 add_flag(&cppflags_obst, "-include");
 811                                 add_flag(&cppflags_obst, "%s", opt);
 812                         } else if (streq(option, "isystem")) {
 813                                 const char *opt;
 814                                 GET_ARG_AFTER(opt, "-isystem");
 815                                 add_flag(&cppflags_obst, "-isystem");
 816                                 add_flag(&cppflags_obst, "%s", opt);
 817                         } else if (streq(option, "nostdinc")
 818                                         || streq(option, "trigraphs")) {
 819                                 /* pass these through to the preprocessor */
 820                                 add_flag(&cppflags_obst, "%s", arg);
 821                         } else if (streq(option, "pipe")) {
 822                                 /* here for gcc compatibility */
 823                         } else if (option[0] == 'f') {
 824                                 char const *orig_opt;
 825                                 GET_ARG_AFTER(orig_opt, "-f");
 826
 827                                 if (strstart(orig_opt, "align-loops=") ||
 828                                     strstart(orig_opt, "align-jumps=") ||
 829                                     strstart(orig_opt, "align-functions=")) {
 830                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 831                                 } else if (strstart(orig_opt, "input-charset=")) {
 832                                         char const* const encoding = strchr(orig_opt, '=') + 1;
 833                                         select_input_encoding(encoding);
 834                                 } else if (streq(orig_opt, "verbose-asm")) {
 835                                         /* ignore: we always print verbose assembler */
 836                                 } else {
 837                                         char const *opt         = orig_opt;
 838                                         bool        truth_value = true;
 839                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 840                                                 truth_value = false;
 841                                                 opt += 3;
 842                                         }
 843
 844                                         if (streq(opt, "builtins")) {
 845                                                 use_builtins = truth_value;
 846                                         } else if (streq(opt, "dollars-in-identifiers")) {
 847                                                 allow_dollar_in_symbol = truth_value;
 848                                         } else if (streq(opt, "omit-frame-pointer")) {
 849                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 850                                         } else if (streq(opt, "short-wchar")) {
 851                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 852                                                         : ATOMIC_TYPE_INT;
 853                                         } else if (streq(opt, "signed-char")) {
 854                                                 char_is_signed = truth_value;
 855                                         } else if (streq(opt, "strength-reduce")) {
 856                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 857                                         } else if (streq(opt, "syntax-only")) {
 858                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 859                                         } else if (streq(opt, "unsigned-char")) {
 860                                                 char_is_signed = !truth_value;
 861                                         } else if (streq(opt, "fast-math")               ||
 862                                                    streq(opt, "jump-tables")             ||
 863                                                    streq(opt, "unroll-loops")            ||
 864                                                    streq(opt, "expensive-optimizations") ||
 865                                                    streq(opt, "common")                  ||
 866                                                    streq(opt, "PIC")                     ||
 867                                                    streq(opt, "align-loops")             ||
 868                                                    streq(opt, "align-jumps")             ||
 869                                                    streq(opt, "align-functions")) {
 870                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 871                                         } else {
 872                                                 int res = firm_option(orig_opt);
 873                                                 if (res == 0) {
 874                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 875                                                                 orig_opt);
 876                                                         argument_errors = true;
 877                                                         continue;
 878                                                 } else if (res == -1) {
 879                                                         help_displayed = true;
 880                                                 }
 881                                         }
 882                                 }
 883                         } else if (option[0] == 'b') {
 884                                 const char *opt;
 885                                 GET_ARG_AFTER(opt, "-b");
 886                                 int res = firm_be_option(opt);
 887                                 if (res == 0) {
 888                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 889                                                 opt);
 890                                         argument_errors = true;
 891                                 } else if (res == -1) {
 892                                         help_displayed = true;
 893                                 } else if (strstart(opt, "isa=")) {
 894                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 895                                 }
 896                         } else if (option[0] == 'W') {
 897                                 if (strstart(option + 1, "p,")) {
 898                                         // pass options directly to the preprocessor
 899                                         const char *opt;
 900                                         GET_ARG_AFTER(opt, "-Wp,");
 901                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 902                                 } else if (strstart(option + 1, "l,")) {
 903                                         // pass options directly to the linker
 904                                         const char *opt;
 905                                         GET_ARG_AFTER(opt, "-Wl,");
 906                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 907                                 } else if (streq(option + 1, "no-trigraphs")
 908                                                         || streq(option + 1, "undef")) {
 909                                         add_flag(&cppflags_obst, "%s", arg);
 910                                 } else {
 911                                         set_warning_opt(&option[1]);
 912                                 }
 913                         } else if (option[0] == 'm') {
 914                                 /* -m options */
 915                                 const char *opt;
 916                                 char arch_opt[64];
 917
 918                                 GET_ARG_AFTER(opt, "-m");
 919                                 if (strstart(opt, "arch=")) {
 920                                         GET_ARG_AFTER(opt, "-march=");
 921                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 922                                         int res = firm_be_option(arch_opt);
 923                                         if (res == 0)
 924                                                 argument_errors = true;
 925                                         else {
 926                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 927                                                 int res = firm_be_option(arch_opt);
 928                                                 if (res == 0)
 929                                                         argument_errors = true;
 930                                         }
 931                                 } else if (strstart(opt, "tune=")) {
 932                                         GET_ARG_AFTER(opt, "-mtune=");
 933                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 934                                         int res = firm_be_option(arch_opt);
 935                                         if (res == 0)
 936                                                 argument_errors = true;
 937                                 } else if (strstart(opt, "cpu=")) {
 938                                         GET_ARG_AFTER(opt, "-mcpu=");
 939                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 940                                         int res = firm_be_option(arch_opt);
 941                                         if (res == 0)
 942                                                 argument_errors = true;
 943                                 } else if (strstart(opt, "fpmath=")) {
 944                                         GET_ARG_AFTER(opt, "-mfpmath=");
 945                                         if (streq(opt, "387"))
 946                                                 opt = "x87";
 947                                         else if (streq(opt, "sse"))
 948                                                 opt = "sse2";
 949                                         else {
 950                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 951                                                 argument_errors = true;
 952                                         }
 953                                         if (!argument_errors) {
 954                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 955                                                 int res = firm_be_option(arch_opt);
 956                                                 if (res == 0)
 957                                                         argument_errors = true;
 958                                         }
 959                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 960                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 961                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 962                                         int res = firm_be_option(arch_opt);
 963                                         if (res == 0)
 964                                                 argument_errors = true;
 965                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 966                                         set_be_option("omitleaffp=1");
 967                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 968                                         set_be_option("omitleaffp=0");
 969                                 } else {
 970                                         char *endptr;
 971                                         long int value = strtol(opt, &endptr, 10);
 972                                         if (*endptr != '\0') {
 973                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 974                                                 argument_errors = true;
 975                                         }
 976                                         if (value != 16 && value != 32 && value != 64) {
 977                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 978                                                 argument_errors = true;
 979                                         } else {
 980                                                 machine_size = (unsigned int)value;
 981                                         }
 982                                 }
 983                         } else if (streq(option, "pg")) {
 984                                 set_be_option("gprof");
 985                                 add_flag(&ldflags_obst, "-pg");
 986                         } else if (streq(option, "pedantic") ||
 987                                    streq(option, "ansi")) {
 988                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 989                         } else if (streq(option, "shared")) {
 990                                 add_flag(&ldflags_obst, "-shared");
 991                         } else if (strstart(option, "std=")) {
 992                                 const char *const o = &option[4];
 993                                 standard =
 994                                         streq(o, "c++")            ? STANDARD_CXX98   :
 995                                         streq(o, "c++98")          ? STANDARD_CXX98   :
 996                                         streq(o, "c89")            ? STANDARD_C89     :
 997                                         streq(o, "c99")            ? STANDARD_C99     :
 998                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
 999                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1000                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1001                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1002                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1003                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1004                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1005                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1006                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1007                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1008                         } else if (streq(option, "version")) {
1009                                 print_cparser_version();
1010                         } else if (strstart(option, "print-file-name=")) {
1011                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1012                         } else if (option[0] == '-') {
1013                                 /* double dash option */
1014                                 ++option;
1015                                 if (streq(option, "gcc")) {
1016                                         features_on  |=  _GNUC;
1017                                         features_off &= ~_GNUC;
1018                                 } else if (streq(option, "no-gcc")) {
1019                                         features_on  &= ~_GNUC;
1020                                         features_off |=  _GNUC;
1021                                 } else if (streq(option, "ms")) {
1022                                         features_on  |=  _MS;
1023                                         features_off &= ~_MS;
1024                                 } else if (streq(option, "no-ms")) {
1025                                         features_on  &= ~_MS;
1026                                         features_off |=  _MS;
1027                                 } else if (streq(option, "strict")) {
1028                                         strict_mode = true;
1029                                 } else if (streq(option, "lextest")) {
1030                                         mode = LexTest;
1031                                 } else if (streq(option, "benchmark")) {
1032                                         mode = BenchmarkParser;
1033                                 } else if (streq(option, "print-ast")) {
1034                                         mode = PrintAst;
1035                                 } else if (streq(option, "print-implicit-cast")) {
1036                                         print_implicit_casts = true;
1037                                 } else if (streq(option, "print-parenthesis")) {
1038                                         print_parenthesis = true;
1039                                 } else if (streq(option, "print-fluffy")) {
1040                                         mode = PrintFluffy;
1041                                 } else if (streq(option, "print-caml")) {
1042                                         mode = PrintCaml;
1043                                 } else if (streq(option, "print-jna")) {
1044                                         mode = PrintJna;
1045                                 } else if (streq(option, "version")) {
1046                                         print_cparser_version();
1047                                         exit(EXIT_SUCCESS);
1048                                 } else if (streq(option, "dump-function")) {
1049                                         ++i;
1050                                         if (i >= argc) {
1051                                                 fprintf(stderr, "error: "
1052                                                         "expected argument after '--dump-function'\n");
1053                                                 argument_errors = true;
1054                                                 break;
1055                                         }
1056                                         dumpfunction = argv[i];
1057                                         mode         = CompileDump;
1058                                 } else {
1059                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1060                                         argument_errors = true;
1061                                 }
1062                         } else {
1063                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1064                                 argument_errors = true;
1065                         }
1066                 } else {
1067                         filetype_t type = forced_filetype;
1068                         if (type == FILETYPE_AUTODETECT) {
1069                                 if (streq(arg, "-")) {
1070                                         /* - implicitly means C source file */
1071                                         type = FILETYPE_C;
1072                                 } else {
1073                                         const char *suffix = strrchr(arg, '.');
1074                                         /* Ensure there is at least one char before the suffix */
1075                                         if (suffix != NULL && suffix != arg) {
1076                                                 ++suffix;
1077                                                 type =
1078                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1079                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1080                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1081                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1082                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1083                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1084                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1085                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1086                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1087                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1088                                                         FILETYPE_AUTODETECT;
1089                                         }
1090                                 }
1091
1092                                 if (type == FILETYPE_AUTODETECT) {
1093                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
1094                                         continue;
1095                                 }
1096                         }
1097
1098                         file_list_entry_t *entry
1099                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1100                         memset(entry, 0, sizeof(entry[0]));
1101                         entry->name = arg;
1102                         entry->type = type;
1103
1104                         if (last_file != NULL) {
1105                                 last_file->next = entry;
1106                         } else {
1107                                 files = entry;
1108                         }
1109                         last_file = entry;
1110                 }
1111         }
1112
1113         if (print_file_name_file != NULL) {
1114                 print_file_name(print_file_name_file);
1115                 return 0;
1116         }
1117
1118         if (files == NULL) {
1119                 fprintf(stderr, "error: no input files specified\n");
1120                 argument_errors = true;
1121         }
1122
1123         if (help_displayed) {
1124                 return !argument_errors;
1125         }
1126         if (argument_errors) {
1127                 usage(argv[0]);
1128                 return 1;
1129         }
1130
1131         /* we do the lowering in ast2firm */
1132         firm_opt.lower_bitfields = FALSE;
1133
1134         /* set the c_mode here, types depends on it */
1135         c_mode |= features_on;
1136         c_mode &= ~features_off;
1137
1138         gen_firm_init();
1139         init_symbol_table();
1140         init_types();
1141         init_typehash();
1142         init_basic_types();
1143         init_lexer();
1144         init_ast();
1145         init_parser();
1146         init_ast2firm();
1147         init_mangle();
1148
1149         if (construct_dep_target) {
1150                 if (outname != 0 && strlen(outname) >= 2) {
1151                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1152                 } else {
1153                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1154                 }
1155         } else {
1156                 dep_target[0] = '\0';
1157         }
1158
1159         char outnamebuf[4096];
1160         if (outname == NULL) {
1161                 const char *filename = files->name;
1162
1163                 switch(mode) {
1164                 case BenchmarkParser:
1165                 case PrintAst:
1166                 case PrintFluffy:
1167                 case PrintCaml:
1168                 case PrintJna:
1169                 case LexTest:
1170                 case PreprocessOnly:
1171                 case ParseOnly:
1172                         outname = "-";
1173                         break;
1174                 case Compile:
1175                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1176                         outname = outnamebuf;
1177                         break;
1178                 case CompileAssemble:
1179                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1180                         outname = outnamebuf;
1181                         break;
1182                 case CompileDump:
1183                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1184                                         ".vcg");
1185                         outname = outnamebuf;
1186                         break;
1187                 case CompileAssembleLink:
1188 #ifdef _WIN32
1189                         outname = "a.exe";
1190 #else
1191                         outname = "a.out";
1192 #endif
1193                         break;
1194                 }
1195         }
1196
1197         assert(outname != NULL);
1198
1199         FILE *out;
1200         if (streq(outname, "-")) {
1201                 out = stdout;
1202         } else {
1203                 out = fopen(outname, "w");
1204                 if (out == NULL) {
1205                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1206                                         strerror(errno));
1207                         return 1;
1208                 }
1209         }
1210
1211         file_list_entry_t *file;
1212         for (file = files; file != NULL; file = file->next) {
1213                 char        asm_tempfile[1024];
1214                 const char *filename = file->name;
1215                 filetype_t  filetype = file->type;
1216
1217                 if (filetype == FILETYPE_OBJECT)
1218                         continue;
1219
1220                 FILE *in = NULL;
1221                 if (mode == LexTest) {
1222                         if (in == NULL)
1223                                 in = open_file(filename);
1224                         lextest(in, filename);
1225                         fclose(in);
1226                         exit(EXIT_SUCCESS);
1227                 }
1228
1229                 FILE *preprocessed_in = NULL;
1230                 switch (filetype) {
1231                         case FILETYPE_C:
1232                                 filetype = FILETYPE_PREPROCESSED_C;
1233                                 goto preprocess;
1234                         case FILETYPE_CXX:
1235                                 filetype = FILETYPE_PREPROCESSED_CXX;
1236                                 goto preprocess;
1237                         case FILETYPE_ASSEMBLER:
1238                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1239                                 add_flag(&cppflags_obst, "-x");
1240                                 add_flag(&cppflags_obst, "assembler-with-cpp");
1241                                 goto preprocess;
1242 preprocess:
1243                                 /* no support for input on FILE* yet */
1244                                 if (in != NULL)
1245                                         panic("internal compiler error: in for preprocessor != NULL");
1246
1247                                 preprocessed_in = preprocess(filename);
1248                                 if (mode == PreprocessOnly) {
1249                                         copy_file(out, preprocessed_in);
1250                                         int result = pclose(preprocessed_in);
1251                                         fclose(out);
1252                                         /* remove output file in case of error */
1253                                         if (out != stdout && result != EXIT_SUCCESS) {
1254                                                 unlink(outname);
1255                                         }
1256                                         return result;
1257                                 }
1258
1259                                 in = preprocessed_in;
1260                                 break;
1261
1262                         default:
1263                                 break;
1264                 }
1265
1266                 FILE *asm_out;
1267                 if (mode == Compile) {
1268                         asm_out = out;
1269                 } else {
1270                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1271                 }
1272
1273                 if (in == NULL)
1274                         in = open_file(filename);
1275
1276                 /* preprocess and compile */
1277                 if (filetype == FILETYPE_PREPROCESSED_C) {
1278                         char const* invalid_mode;
1279                         switch (standard) {
1280                                 case STANDARD_ANSI:
1281                                 case STANDARD_C89:   c_mode = _C89;                break;
1282                                 /* TODO ^v determine difference between these two */
1283                                 case STANDARD_C90:   c_mode = _C89;                break;
1284                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1285                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1286
1287 default_c_warn:
1288                                         fprintf(stderr,
1289                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1290                                                         invalid_mode);
1291                                         /* FALLTHROUGH */
1292                                 case STANDARD_DEFAULT:
1293                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1294
1295                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1296                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1297                         }
1298                         goto do_parsing;
1299                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1300                         char const* invalid_mode;
1301                         switch (standard) {
1302                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1303                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1304                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1305                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1306                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1307
1308                                 case STANDARD_ANSI:
1309                                 case STANDARD_CXX98: c_mode = _CXX; break;
1310
1311 default_cxx_warn:
1312                                         fprintf(stderr,
1313                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1314                                                         invalid_mode);
1315                                 case STANDARD_DEFAULT:
1316                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1317                         }
1318
1319 do_parsing:
1320                         c_mode |= features_on;
1321                         c_mode &= ~features_off;
1322
1323                         init_tokens();
1324                         translation_unit_t *const unit = do_parsing(in, filename);
1325
1326                         /* prints the AST even if errors occurred */
1327                         if (mode == PrintAst) {
1328                                 type_set_output(out);
1329                                 ast_set_output(out);
1330                                 print_ast(unit);
1331                         }
1332
1333                         if (error_count > 0) {
1334                                 /* parsing failed because of errors */
1335                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1336                                         warning_count);
1337                                 result = EXIT_FAILURE;
1338                                 continue;
1339                         } else if (warning_count > 0) {
1340                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1341                         }
1342
1343                         if (in == preprocessed_in) {
1344                                 int pp_result = pclose(preprocessed_in);
1345                                 if (pp_result != EXIT_SUCCESS) {
1346                                         /* remove output file */
1347                                         if (out != stdout)
1348                                                 unlink(outname);
1349                                         exit(EXIT_FAILURE);
1350                                 }
1351                         }
1352
1353                         if (mode == BenchmarkParser) {
1354                                 return result;
1355                         } else if (mode == PrintFluffy) {
1356                                 write_fluffy_decls(out, unit);
1357                                 continue;
1358                         } else if (mode == PrintCaml) {
1359                                 write_caml_decls(out, unit);
1360                                 continue;
1361                         } else if (mode == PrintJna) {
1362                                 write_jna_decls(out, unit);
1363                                 continue;
1364                         }
1365
1366                         translation_unit_to_firm(unit);
1367
1368                         if (mode == ParseOnly) {
1369                                 continue;
1370                         }
1371
1372                         if (mode == CompileDump) {
1373                                 /* find irg */
1374                                 ident    *id     = new_id_from_str(dumpfunction);
1375                                 ir_graph *irg    = NULL;
1376                                 int       n_irgs = get_irp_n_irgs();
1377                                 for (int i = 0; i < n_irgs; ++i) {
1378                                         ir_graph *tirg   = get_irp_irg(i);
1379                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1380                                         if (irg_id == id) {
1381                                                 irg = tirg;
1382                                                 break;
1383                                         }
1384                                 }
1385
1386                                 if (irg == NULL) {
1387                                         fprintf(stderr, "No graph for function '%s' found\n",
1388                                                 dumpfunction);
1389                                         exit(1);
1390                                 }
1391
1392                                 dump_ir_block_graph_file(irg, out);
1393                                 fclose(out);
1394                                 exit(0);
1395                         }
1396
1397                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1398                                         have_const_functions);
1399                         if (asm_out != out) {
1400                                 fclose(asm_out);
1401                         }
1402                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1403                         copy_file(asm_out, in);
1404                         if (in == preprocessed_in) {
1405                                 int pp_result = pclose(preprocessed_in);
1406                                 if (pp_result != EXIT_SUCCESS) {
1407                                         /* remove output in error case */
1408                                         if (out != stdout)
1409                                                 unlink(outname);
1410                                         return pp_result;
1411                                 }
1412                         }
1413                         if (asm_out != out) {
1414                                 fclose(asm_out);
1415                         }
1416                 }
1417
1418                 if (mode == Compile)
1419                         continue;
1420
1421                 /* if we're here then we have preprocessed assembly */
1422                 filename = asm_tempfile;
1423                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1424
1425                 /* assemble */
1426                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1427                         char        temp[1024];
1428                         const char *filename_o;
1429                         if (mode == CompileAssemble) {
1430                                 fclose(out);
1431                                 filename_o = outname;
1432                         } else {
1433                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1434                                 fclose(tempf);
1435                                 filename_o = temp;
1436                         }
1437
1438                         assemble(filename_o, filename);
1439
1440                         size_t len = strlen(filename_o) + 1;
1441                         filename = obstack_copy(&file_obst, filename_o, len);
1442                         filetype = FILETYPE_OBJECT;
1443                 }
1444
1445                 /* ok we're done here, process next file */
1446                 file->name = filename;
1447                 file->type = filetype;
1448         }
1449
1450         if (result != EXIT_SUCCESS) {
1451                 if (out != stdout)
1452                         unlink(outname);
1453                 return result;
1454         }
1455
1456         /* link program file */
1457         if (mode == CompileAssembleLink) {
1458                 obstack_1grow(&ldflags_obst, '\0');
1459                 const char *flags = obstack_finish(&ldflags_obst);
1460
1461                 /* construct commandline */
1462                 obstack_printf(&file_obst, "%s", LINKER);
1463                 for (file_list_entry_t *entry = files; entry != NULL;
1464                                 entry = entry->next) {
1465                         if (entry->type != FILETYPE_OBJECT)
1466                                 continue;
1467
1468                         add_flag(&file_obst, "%s", entry->name);
1469                 }
1470
1471                 add_flag(&file_obst, "-o");
1472                 add_flag(&file_obst, outname);
1473                 obstack_printf(&file_obst, "%s", flags);
1474                 obstack_1grow(&file_obst, '\0');
1475
1476                 char *commandline = obstack_finish(&file_obst);
1477
1478                 if (verbose) {
1479                         puts(commandline);
1480                 }
1481                 int err = system(commandline);
1482                 if (err != EXIT_SUCCESS) {
1483                         fprintf(stderr, "linker reported an error\n");
1484                         exit(1);
1485                 }
1486         }
1487
1488         obstack_free(&cppflags_obst, NULL);
1489         obstack_free(&ldflags_obst, NULL);
1490         obstack_free(&file_obst, NULL);
1491
1492         exit_mangle();
1493         exit_ast2firm();
1494         exit_parser();
1495         exit_ast();
1496         exit_lexer();
1497         exit_typehash();
1498         exit_types();
1499         exit_tokens();
1500         exit_symbol_table();
1501         return 0;
1502 }