nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #define _GNU_SOURCE
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <stdbool.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <assert.h>
  30
  31 #ifdef _WIN32
  32
  33 #include <fcntl.h>
  34 #include <io.h>
  35
  36 /* no eXecute on Win32 */
  37 #define X_OK 0
  38 #define W_OK 2
  39 #define R_OK 4
  40
  41 #define O_RDWR          _O_RDWR
  42 #define O_CREAT         _O_CREAT
  43 #define O_EXCL          _O_EXCL
  44 #define O_BINARY        _O_BINARY
  45
  46 /* remap some names, we are not in the POSIX world */
  47 #define access(fname, mode)      _access(fname, mode)
  48 #define mktemp(tmpl)             _mktemp(tmpl)
  49 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  50 #define fdopen(fd, mode)         _fdopen(fd, mode)
  51 #define popen(cmd, mode)         _popen(cmd, mode)
  52 #define pclose(file)             _pclose(file)
  53 #define unlink(filename)         _unlink(filename)
  54
  55 #else
  56 #include <unistd.h>
  57 #define HAVE_MKSTEMP
  58 #endif
  59
  60 #include <libfirm/firm.h>
  61 #include <libfirm/be.h>
  62
  63 #include "lexer.h"
  64 #include "token_t.h"
  65 #include "types.h"
  66 #include "type_hash.h"
  67 #include "parser.h"
  68 #include "type_t.h"
  69 #include "ast2firm.h"
  70 #include "diagnostic.h"
  71 #include "lang_features.h"
  72 #include "driver/firm_opt.h"
  73 #include "driver/firm_cmdline.h"
  74 #include "adt/error.h"
  75 #include "write_fluffy.h"
  76 #include "write_caml.h"
  77 #include "revision.h"
  78 #include "warning.h"
  79 #include "mangle.h"
  80
  81 #ifndef PREPROCESSOR
  82 #ifndef __WIN32__
  83 #define PREPROCESSOR "gcc -E -std=c99 -m32 -U__STRICT_ANSI__"
  84 #else
  85 #define PREPROCESSOR "cpp -std=c99 -m32 -U__STRICT_ANSI__"
  86 #endif
  87 #endif
  88
  89 #ifndef LINKER
  90 #define LINKER    "gcc -m32"
  91 #endif
  92
  93 #ifndef ASSEMBLER
  94 #ifdef __APPLE__
  95 #define ASSEMBLER "gcc -c -xassembler"
  96 #else
  97 #define ASSEMBLER "as --32"
  98 #endif
  99 #endif
 100
 101 /** The current c mode/dialect. */
 102 unsigned int c_mode = _C89 | _ANSI | _C99 | _GNUC;
 103
 104 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
 105 unsigned int machine_size = 32;
 106
 107 /** true if the char type is signed. */
 108 bool char_is_signed = true;
 109
 110 /** true for strict language checking. */
 111 bool strict_mode = false;
 112
 113 /** use builtins for some libc functions */
 114 bool use_builtins = false;
 115
 116 /** we have extern function with const attribute. */
 117 bool have_const_functions = false;
 118
 119 atomic_type_kind_t wchar_atomic_kind = ATOMIC_TYPE_INT;
 120
 121 /* to switch on printing of implicit casts */
 122 extern bool print_implicit_casts;
 123
 124 /* to switch on printing of parenthesis to indicate operator precedence */
 125 extern bool print_parenthesis;
 126
 127 static int             verbose;
 128 static struct obstack  cppflags_obst, ldflags_obst;
 129 static char            dep_target[1024];
 130 static const char     *outname;
 131
 132 typedef struct file_list_entry_t file_list_entry_t;
 133
 134 typedef enum filetype_t {
 135         FILETYPE_AUTODETECT,
 136         FILETYPE_C,
 137         FILETYPE_PREPROCESSED_C,
 138         FILETYPE_CXX,
 139         FILETYPE_PREPROCESSED_CXX,
 140         FILETYPE_ASSEMBLER,
 141         FILETYPE_PREPROCESSED_ASSEMBLER,
 142         FILETYPE_OBJECT,
 143         FILETYPE_UNKNOWN
 144 } filetype_t;
 145
 146 struct file_list_entry_t {
 147         const char  *name; /**< filename or NULL for stdin */
 148         filetype_t   type;
 149         file_list_entry_t *next;
 150 };
 151
 152 static file_list_entry_t *temp_files;
 153
 154 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 155 /**
 156  * Debug printf implementation.
 157  *
 158  * @param fmt  printf style format parameter
 159  */
 160 void dbg_printf(const char *fmt, ...)
 161 {
 162         va_list list;
 163
 164         if (firm_dump.debug_print) {
 165                 va_start(list, fmt);
 166                 vprintf(fmt, list);
 167                 va_end(list);
 168         }  /* if */
 169 }
 170 #endif /* defined(_DEBUG) || defined(FIRM_DEBUG) */
 171
 172 static void initialize_firm(void)
 173 {
 174         firm_early_init();
 175
 176         dump_consts_local(1);
 177         dump_keepalive_edges(1);
 178 }
 179
 180 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 181                             const char *newext)
 182 {
 183         size_t last_dot = 0xffffffff;
 184         size_t i = 0;
 185
 186         if (inputname == NULL) {
 187                 snprintf(buf, buflen, "a%s", newext);
 188                 return;
 189         }
 190
 191         for (const char *c = inputname; *c != 0; ++c) {
 192                 if (*c == '.')
 193                         last_dot = i;
 194                 ++i;
 195         }
 196         if (last_dot == 0xffffffff)
 197                 last_dot = i;
 198
 199         if (last_dot >= buflen)
 200                 panic("filename too long");
 201         memcpy(buf, inputname, last_dot);
 202
 203         size_t extlen = strlen(newext) + 1;
 204         if (extlen + last_dot >= buflen)
 205                 panic("filename too long");
 206         memcpy(buf+last_dot, newext, extlen);
 207 }
 208
 209 #include "builtins.h"
 210
 211 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 212 {
 213         start_parsing();
 214
 215         if (use_builtins) {
 216                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 217                 parse();
 218         }
 219
 220         lexer_open_stream(in, input_name);
 221         parse();
 222
 223         translation_unit_t *unit = finish_parsing();
 224         return unit;
 225 }
 226
 227 static void lextest(FILE *in, const char *fname)
 228 {
 229         lexer_open_stream(in, fname);
 230
 231         do {
 232                 lexer_next_preprocessing_token();
 233                 print_token(stdout, &lexer_token);
 234                 putchar('\n');
 235         } while (lexer_token.type != T_EOF);
 236 }
 237
 238 static void add_flag(struct obstack *obst, const char *format, ...)
 239 {
 240         char buf[4096];
 241         va_list ap;
 242
 243         va_start(ap, format);
 244 #ifdef _WIN32
 245         int len =
 246 #endif
 247                 vsnprintf(buf, sizeof(buf), format, ap);
 248         va_end(ap);
 249
 250         obstack_1grow(obst, ' ');
 251 #ifdef _WIN32
 252         obstack_1grow(obst, '"');
 253         obstack_grow(obst, buf, len);
 254         obstack_1grow(obst, '"');
 255 #else
 256         /* escape stuff... */
 257         for (char *c = buf; *c != '\0'; ++c) {
 258                 switch(*c) {
 259                 case ' ':
 260                 case '"':
 261                 case '$':
 262                 case '&':
 263                 case '(':
 264                 case ')':
 265                 case ';':
 266                 case '<':
 267                 case '>':
 268                 case '\'':
 269                 case '\\':
 270                 case '\n':
 271                 case '\r':
 272                 case '\t':
 273                 case '`':
 274                 case '|':
 275                         obstack_1grow(obst, '\\');
 276                         /* FALLTHROUGH */
 277                 default:
 278                         obstack_1grow(obst, *c);
 279                         break;
 280                 }
 281         }
 282 #endif
 283 }
 284
 285 static const char *type_to_string(type_t *type)
 286 {
 287         assert(type->kind == TYPE_ATOMIC);
 288         return get_atomic_kind_name(type->atomic.akind);
 289 }
 290
 291 static FILE *preprocess(const char *fname)
 292 {
 293         obstack_1grow(&cppflags_obst, '\0');
 294         const char *flags = obstack_finish(&cppflags_obst);
 295
 296         obstack_printf(&cppflags_obst, "%s", PREPROCESSOR);
 297
 298         /* setup default defines */
 299         add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 300         add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 301         add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 302         add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 303
 304         /* TODO hack... */
 305         add_flag(&cppflags_obst, "-D__builtin_abort=abort");
 306         add_flag(&cppflags_obst, "-D__builtin_abs=abs");
 307         add_flag(&cppflags_obst, "-D__builtin_exit=exit");
 308         add_flag(&cppflags_obst, "-D__builtin_malloc=malloc");
 309         add_flag(&cppflags_obst, "-D__builtin_memcmp=memcmp");
 310         add_flag(&cppflags_obst, "-D__builtin_memcpy=memcpy");
 311         add_flag(&cppflags_obst, "-D__builtin_memset=memset");
 312         add_flag(&cppflags_obst, "-D__builtin_strlen=strlen");
 313         add_flag(&cppflags_obst, "-D__builtin_strcmp=strcmp");
 314         add_flag(&cppflags_obst, "-D__builtin_strcpy=strcpy");
 315
 316         /* handle dependency generation */
 317         if (dep_target[0] != '\0') {
 318                 add_flag(&cppflags_obst, "-MF");
 319                 add_flag(&cppflags_obst, dep_target);
 320                 if (outname != NULL) {
 321                                 add_flag(&cppflags_obst, "-MQ");
 322                                 add_flag(&cppflags_obst, outname);
 323                 }
 324         }
 325         if (flags[0] != '\0') {
 326                 obstack_printf(&cppflags_obst, " %s", flags);
 327         }
 328         add_flag(&cppflags_obst, fname);
 329
 330         obstack_1grow(&cppflags_obst, '\0');
 331         const char *buf = obstack_finish(&cppflags_obst);
 332         if (verbose) {
 333                 puts(buf);
 334         }
 335
 336         FILE *f = popen(buf, "r");
 337         if (f == NULL) {
 338                 fprintf(stderr, "invoking preprocessor failed\n");
 339                 exit(1);
 340         }
 341
 342         return f;
 343 }
 344
 345 static void assemble(const char *out, const char *in)
 346 {
 347         char buf[4096];
 348
 349         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 350         if (verbose) {
 351                 puts(buf);
 352         }
 353
 354         int err = system(buf);
 355         if (err != 0) {
 356                 fprintf(stderr, "assembler reported an error\n");
 357                 exit(1);
 358         }
 359 }
 360
 361 static void print_file_name(const char *file)
 362 {
 363         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 364
 365         obstack_1grow(&ldflags_obst, '\0');
 366         const char *flags = obstack_finish(&ldflags_obst);
 367
 368         /* construct commandline */
 369         obstack_printf(&ldflags_obst, "%s ", LINKER);
 370         obstack_printf(&ldflags_obst, "%s", flags);
 371         obstack_1grow(&ldflags_obst, '\0');
 372
 373         char *commandline = obstack_finish(&ldflags_obst);
 374
 375         if (verbose) {
 376                 puts(commandline);
 377         }
 378         int err = system(commandline);
 379         if (err != EXIT_SUCCESS) {
 380                 fprintf(stderr, "linker reported an error\n");
 381                 exit(1);
 382         }
 383 }
 384
 385 static const char *try_dir(const char *dir)
 386 {
 387         if (dir == NULL)
 388                 return dir;
 389         if (access(dir, R_OK | W_OK | X_OK) == 0)
 390                 return dir;
 391         return NULL;
 392 }
 393
 394 static const char *get_tempdir(void)
 395 {
 396         static const char *tmpdir = NULL;
 397
 398         if (tmpdir != NULL)
 399                 return tmpdir;
 400
 401         if (tmpdir == NULL)
 402                 tmpdir = try_dir(getenv("TMPDIR"));
 403         if (tmpdir == NULL)
 404                 tmpdir = try_dir(getenv("TMP"));
 405         if (tmpdir == NULL)
 406                 tmpdir = try_dir(getenv("TEMP"));
 407
 408 #ifdef P_tmpdir
 409         if (tmpdir == NULL)
 410                 tmpdir = try_dir(P_tmpdir);
 411 #endif
 412
 413         if (tmpdir == NULL)
 414                 tmpdir = try_dir("/var/tmp");
 415         if (tmpdir == NULL)
 416                 tmpdir = try_dir("/usr/tmp");
 417         if (tmpdir == NULL)
 418                 tmpdir = try_dir("/tmp");
 419
 420         if (tmpdir == NULL)
 421                 tmpdir = ".";
 422
 423         return tmpdir;
 424 }
 425
 426 #ifndef HAVE_MKSTEMP
 427 /* cheap and nasty mkstemp replacement */
 428 static int mkstemp(char *templ)
 429 {
 430         mktemp(templ);
 431         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 432 }
 433 #endif
 434
 435 /**
 436  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 437  * during linking (like glibc/gnu ld do for tmpnam)...
 438  */
 439 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 440 {
 441         const char *tempdir = get_tempdir();
 442
 443         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 444
 445         int fd = mkstemp(buffer);
 446         if (fd == -1) {
 447                 fprintf(stderr, "couldn't create temporary file: %s\n",
 448                         strerror(errno));
 449                 exit(1);
 450         }
 451         FILE *out = fdopen(fd, "w");
 452         if (out == NULL) {
 453                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 454                 exit(1);
 455         }
 456
 457         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 458         memset(entry, 0, sizeof(*entry));
 459
 460         size_t  name_len = strlen(buffer) + 1;
 461         char   *name     = malloc(name_len);
 462         memcpy(name, buffer, name_len);
 463         entry->name      = name;
 464
 465         entry->next = temp_files;
 466         temp_files  = entry;
 467
 468         return out;
 469 }
 470
 471 static void free_temp_files(void)
 472 {
 473         file_list_entry_t *entry = temp_files;
 474         file_list_entry_t *next;
 475         for ( ; entry != NULL; entry = next) {
 476                 next = entry->next;
 477
 478                 unlink(entry->name);
 479                 free((char*) entry->name);
 480                 free(entry);
 481         }
 482         temp_files = NULL;
 483 }
 484
 485 /**
 486  * Do the necessary lowering for compound parameters.
 487  */
 488 void lower_compound_params(void)
 489 {
 490         lower_params_t params;
 491
 492         params.def_ptr_alignment    = 4;
 493         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 494         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 495         params.find_pointer_type    = NULL;
 496         params.ret_compound_in_regs = NULL;
 497         lower_calls_with_compounds(&params);
 498 }
 499
 500 typedef enum compile_mode_t {
 501         BenchmarkParser,
 502         PreprocessOnly,
 503         ParseOnly,
 504         Compile,
 505         CompileDump,
 506         CompileAssemble,
 507         CompileAssembleLink,
 508         LexTest,
 509         PrintAst,
 510         PrintFluffy,
 511         PrintCaml
 512 } compile_mode_t;
 513
 514 static void usage(const char *argv0)
 515 {
 516         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 517 }
 518
 519 static void print_cparser_version(void) {
 520         firm_version_t ver;
 521         firm_get_version(&ver);
 522
 523         printf("cparser (%s) using libFirm (%u.%u",
 524                 cparser_REVISION, ver.major, ver.minor);
 525         if (ver.revision[0] != 0) {
 526                 putchar(' ');
 527                 fputs(ver.revision, stdout);
 528         }
 529         if (ver.build[0] != 0) {
 530                 putchar(' ');
 531                 fputs(ver.build, stdout);
 532         }
 533         puts(")\n");
 534 }
 535
 536 static void set_be_option(const char *arg)
 537 {
 538         int res = firm_be_option(arg);
 539         (void) res;
 540         assert(res);
 541 }
 542
 543 static void set_option(const char *arg)
 544 {
 545         int res = firm_option(arg);
 546         (void) res;
 547         assert(res);
 548 }
 549
 550 static void copy_file(FILE *dest, FILE *input)
 551 {
 552         char buf[16384];
 553
 554         while (!feof(input) && !ferror(dest)) {
 555                 size_t read = fread(buf, 1, sizeof(buf), input);
 556                 if (fwrite(buf, 1, read, dest) != read) {
 557                         perror("couldn't write output");
 558                 }
 559         }
 560 }
 561
 562 static inline bool streq(char const* a, char const* b)
 563 {
 564         return strcmp(a, b) == 0;
 565 }
 566
 567 static inline bool strstart(char const* str, char const* start)
 568 {
 569         do {
 570                 if (*start == '\0')
 571                         return true;
 572         } while (*str++ == *start++);
 573         return false;
 574 }
 575
 576 static FILE *open_file(const char *filename)
 577 {
 578         if (streq(filename, "-")) {
 579                 return stdin;
 580         }
 581
 582         FILE *in = fopen(filename, "r");
 583         if (in == NULL) {
 584                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 585                                 strerror(errno));
 586                 exit(1);
 587         }
 588
 589         return in;
 590 }
 591
 592 static filetype_t get_filetype_from_string(const char *string)
 593 {
 594         if (streq(string, "c") || streq(string, "c-header"))
 595                 return FILETYPE_C;
 596         if (streq(string, "c++") || streq(string, "c++-header"))
 597                 return FILETYPE_CXX;
 598         if (streq(string, "assembler"))
 599                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 600         if (streq(string, "assembler-with-cpp"))
 601                 return FILETYPE_ASSEMBLER;
 602         if (streq(string, "none"))
 603                 return FILETYPE_AUTODETECT;
 604
 605         return FILETYPE_UNKNOWN;
 606 }
 607
 608 static void init_os_support(void)
 609 {
 610         /* OS option must be set to the backend */
 611         switch (firm_opt.os_support) {
 612         case OS_SUPPORT_MINGW:
 613                 set_be_option("ia32-gasmode=mingw");
 614                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 615                 break;
 616         case OS_SUPPORT_LINUX:
 617                 set_be_option("ia32-gasmode=elf");
 618                 break;
 619         case OS_SUPPORT_MACHO:
 620                 set_be_option("ia32-gasmode=macho");
 621                 set_be_option("ia32-stackalign=4");
 622                 set_be_option("pic");
 623                 break;
 624         }
 625 }
 626
 627 typedef enum lang_standard_t {
 628         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 629         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 630         STANDARD_C89,     /* ISO C90 (sic) */
 631         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 632         STANDARD_C99,     /* ISO C99 */
 633         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 634         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 635         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 636         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 637 } lang_standard_t;
 638
 639 int main(int argc, char **argv)
 640 {
 641         initialize_firm();
 642
 643         const char        *dumpfunction         = NULL;
 644         const char        *print_file_name_file = NULL;
 645         compile_mode_t     mode                 = CompileAssembleLink;
 646         int                opt_level            = 1;
 647         int                result               = EXIT_SUCCESS;
 648         char               cpu_arch[16]         = "ia32";
 649         file_list_entry_t *files                = NULL;
 650         file_list_entry_t *last_file            = NULL;
 651         bool               construct_dep_target = false;
 652         struct obstack     file_obst;
 653
 654         atexit(free_temp_files);
 655
 656         /* hack for now... */
 657         if (strstr(argv[0], "pptest") != NULL) {
 658                 extern int pptest_main(int argc, char **argv);
 659                 return pptest_main(argc, argv);
 660         }
 661
 662         obstack_init(&cppflags_obst);
 663         obstack_init(&ldflags_obst);
 664         obstack_init(&file_obst);
 665
 666 #define GET_ARG_AFTER(def, args)                                             \
 667         def = &arg[sizeof(args)-1];                                              \
 668         if (def[0] == '\0') {                                                     \
 669                 ++i;                                                                 \
 670                 if (i >= argc) {                                                      \
 671                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 672                         argument_errors = true;                                          \
 673                         break;                                                           \
 674                 }                                                                    \
 675                 def = argv[i];                                                       \
 676                 if (def[0] == '-' && def[1] != '\0') {                                \
 677                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 678                         argument_errors = true;                                          \
 679                         continue;                                                        \
 680                 }                                                                    \
 681         }
 682
 683 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 684
 685         /* early options parsing (find out optimisation level and OS) */
 686         for (int i = 1; i < argc; ++i) {
 687                 const char *arg = argv[i];
 688                 if (arg[0] != '-')
 689                         continue;
 690
 691                 const char *option = &arg[1];
 692                 if (option[0] == 'O') {
 693                         sscanf(&option[1], "%d", &opt_level);
 694                 }
 695                 if (strcmp(arg, "-fwin32") == 0) {
 696                         firm_opt.os_support = OS_SUPPORT_MINGW;
 697                 } else if (strcmp(arg, "-fmac") == 0) {
 698                         firm_opt.os_support = OS_SUPPORT_MACHO;
 699                 } else if (strcmp(arg, "-flinux") == 0) {
 700                         firm_opt.os_support = OS_SUPPORT_LINUX;
 701                 }
 702         }
 703
 704         /* set target/os specific stuff */
 705         init_os_support();
 706
 707         /* apply optimisation level */
 708         switch(opt_level) {
 709         case 0:
 710                 set_option("no-opt");
 711                 break;
 712         case 1:
 713                 set_option("no-inline");
 714                 break;
 715         default:
 716         case 4:
 717                 set_option("strict-aliasing");
 718                 /* use_builtins = true; */
 719                 /* fallthrough */
 720         case 3:
 721                 set_option("cond-eval");
 722                 set_option("if-conv");
 723                 /* fallthrough */
 724         case 2:
 725                 set_option("inline");
 726                 set_option("deconv");
 727                 set_be_option("omitfp");
 728                 break;
 729         }
 730
 731         /* parse rest of options */
 732         lang_standard_t standard        = STANDARD_DEFAULT;
 733         unsigned        features_on     = 0;
 734         unsigned        features_off    = 0;
 735         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 736         bool            help_displayed  = false;
 737         bool            argument_errors = false;
 738         for (int i = 1; i < argc; ++i) {
 739                 const char *arg = argv[i];
 740                 if (arg[0] == '-' && arg[1] != '\0') {
 741                         /* an option */
 742                         const char *option = &arg[1];
 743                         if (option[0] == 'o') {
 744                                 GET_ARG_AFTER(outname, "-o");
 745                         } else if (option[0] == 'g') {
 746                                 set_be_option("debuginfo=stabs");
 747                                 set_be_option("omitfp=no");
 748                                 set_be_option("ia32-nooptcc=yes");
 749                         } else if (SINGLE_OPTION('c')) {
 750                                 mode = CompileAssemble;
 751                         } else if (SINGLE_OPTION('E')) {
 752                                 mode = PreprocessOnly;
 753                         } else if (SINGLE_OPTION('S')) {
 754                                 mode = Compile;
 755                         } else if (option[0] == 'O') {
 756                                 continue;
 757                         } else if (option[0] == 'I') {
 758                                 const char *opt;
 759                                 GET_ARG_AFTER(opt, "-I");
 760                                 add_flag(&cppflags_obst, "-I%s", opt);
 761                         } else if (option[0] == 'D') {
 762                                 const char *opt;
 763                                 GET_ARG_AFTER(opt, "-D");
 764                                 add_flag(&cppflags_obst, "-D%s", opt);
 765                         } else if (option[0] == 'U') {
 766                                 const char *opt;
 767                                 GET_ARG_AFTER(opt, "-U");
 768                                 add_flag(&cppflags_obst, "-U%s", opt);
 769                         } else if (option[0] == 'l') {
 770                                 const char *opt;
 771                                 GET_ARG_AFTER(opt, "-l");
 772                                 add_flag(&ldflags_obst, "-l%s", opt);
 773                         } else if (option[0] == 'L') {
 774                                 const char *opt;
 775                                 GET_ARG_AFTER(opt, "-L");
 776                                 add_flag(&ldflags_obst, "-L%s", opt);
 777                         } else if (SINGLE_OPTION('v')) {
 778                                 verbose = 1;
 779                         } else if (SINGLE_OPTION('w')) {
 780                                 memset(&warning, 0, sizeof(warning));
 781                         } else if (option[0] == 'x') {
 782                                 const char *opt;
 783                                 GET_ARG_AFTER(opt, "-x");
 784                                 forced_filetype = get_filetype_from_string(opt);
 785                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 786                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 787                                         argument_errors = true;
 788                                 }
 789                         } else if (streq(option, "M")) {
 790                                 mode = PreprocessOnly;
 791                                 add_flag(&cppflags_obst, "-M");
 792                         } else if (streq(option, "MMD") ||
 793                                    streq(option, "MD")) {
 794                             construct_dep_target = true;
 795                                 add_flag(&cppflags_obst, "-%s", option);
 796                         } else if (streq(option, "MM")  ||
 797                                    streq(option, "MP")) {
 798                                 add_flag(&cppflags_obst, "-%s", option);
 799                         } else if (streq(option, "MT") ||
 800                                    streq(option, "MQ") ||
 801                                    streq(option, "MF")) {
 802                                 const char *opt;
 803                                 GET_ARG_AFTER(opt, "-MT");
 804                                 add_flag(&cppflags_obst, "-%s", option);
 805                                 add_flag(&cppflags_obst, "%s", opt);
 806                         } else if (streq(option, "include")) {
 807                                 const char *opt;
 808                                 GET_ARG_AFTER(opt, "-include");
 809                                 add_flag(&cppflags_obst, "-include");
 810                                 add_flag(&cppflags_obst, "%s", opt);
 811                         } else if (streq(option, "isystem")) {
 812                                 const char *opt;
 813                                 GET_ARG_AFTER(opt, "-isystem");
 814                                 add_flag(&cppflags_obst, "-isystem");
 815                                 add_flag(&cppflags_obst, "%s", opt);
 816                         } else if (streq(option, "nostdinc")
 817                                         || streq(option, "trigraphs")) {
 818                                 /* pass these through to the preprocessor */
 819                                 add_flag(&cppflags_obst, "%s", arg);
 820                         } else if (streq(option, "pipe")) {
 821                                 /* here for gcc compatibility */
 822                         } else if (option[0] == 'f') {
 823                                 char const *orig_opt;
 824                                 GET_ARG_AFTER(orig_opt, "-f");
 825
 826                                 if (strstart(orig_opt, "align-loops=") ||
 827                                     strstart(orig_opt, "align-jumps=") ||
 828                                     strstart(orig_opt, "align-functions=")) {
 829                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 830                                 } else if (streq(orig_opt, "verbose-asm")) {
 831                                         /* ignore: we always print verbose assembler */
 832                                 } else {
 833                                         char const *opt         = orig_opt;
 834                                         bool        truth_value = true;
 835                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 836                                                 truth_value = false;
 837                                                 opt += 3;
 838                                         }
 839
 840                                         if (streq(opt, "dollars-in-identifiers")) {
 841                                                 allow_dollar_in_symbol = truth_value;
 842                                         } if (streq(opt, "builtins")) {
 843                                                 use_builtins = truth_value;
 844                                         } else if (streq(opt, "short-wchar")) {
 845                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 846                                                         : ATOMIC_TYPE_INT;
 847                                         } else if (streq(opt, "syntax-only")) {
 848                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 849                                         } else if (streq(opt, "omit-frame-pointer")) {
 850                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 851                                         } else if (streq(opt, "strength-reduce")) {
 852                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 853                                         } else if (streq(opt, "fast-math")               ||
 854                                                    streq(opt, "jump-tables")             ||
 855                                                    streq(opt, "unroll-loops")            ||
 856                                                    streq(opt, "expensive-optimizations") ||
 857                                                    streq(opt, "common")                  ||
 858                                                    streq(opt, "PIC")                     ||
 859                                                    streq(opt, "align-loops")             ||
 860                                                    streq(opt, "align-jumps")             ||
 861                                                    streq(opt, "align-functions")) {
 862                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 863                                         } else {
 864                                                 int res = firm_option(orig_opt);
 865                                                 if (res == 0) {
 866                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 867                                                                 orig_opt);
 868                                                         argument_errors = true;
 869                                                         continue;
 870                                                 } else if (res == -1) {
 871                                                         help_displayed = true;
 872                                                 }
 873                                         }
 874                                 }
 875                         } else if (option[0] == 'b') {
 876                                 const char *opt;
 877                                 GET_ARG_AFTER(opt, "-b");
 878                                 int res = firm_be_option(opt);
 879                                 if (res == 0) {
 880                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 881                                                 opt);
 882                                         argument_errors = true;
 883                                 } else if (res == -1) {
 884                                         help_displayed = true;
 885                                 } else if (strstart(opt, "isa=")) {
 886                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 887                                 }
 888                         } else if (option[0] == 'W') {
 889                                 if (strstart(option + 1, "p,")) {
 890                                         // pass options directly to the preprocessor
 891                                         const char *opt;
 892                                         GET_ARG_AFTER(opt, "-Wp,");
 893                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 894                                 } else if (strstart(option + 1, "l,")) {
 895                                         // pass options directly to the linker
 896                                         const char *opt;
 897                                         GET_ARG_AFTER(opt, "-Wl,");
 898                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 899                                 } else if (streq(option + 1, "no-trigraphs")
 900                                                         || streq(option + 1, "undef")) {
 901                                         add_flag(&cppflags_obst, "%s", arg);
 902                                 } else {
 903                                         set_warning_opt(&option[1]);
 904                                 }
 905                         } else if (option[0] == 'm') {
 906                                 /* -m options */
 907                                 const char *opt;
 908                                 char arch_opt[64];
 909
 910                                 GET_ARG_AFTER(opt, "-m");
 911                                 if (strstart(opt, "arch=")) {
 912                                         GET_ARG_AFTER(opt, "-march=");
 913                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 914                                         int res = firm_be_option(arch_opt);
 915                                         if (res == 0)
 916                                                 argument_errors = true;
 917                                         else {
 918                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 919                                                 int res = firm_be_option(arch_opt);
 920                                                 if (res == 0)
 921                                                         argument_errors = true;
 922                                         }
 923                                 } else if (strstart(opt, "tune=")) {
 924                                         GET_ARG_AFTER(opt, "-mtune=");
 925                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 926                                         int res = firm_be_option(arch_opt);
 927                                         if (res == 0)
 928                                                 argument_errors = true;
 929                                 } else if (strstart(opt, "cpu=")) {
 930                                         GET_ARG_AFTER(opt, "-mcpu=");
 931                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 932                                         int res = firm_be_option(arch_opt);
 933                                         if (res == 0)
 934                                                 argument_errors = true;
 935                                 } else if (strstart(opt, "fpmath=")) {
 936                                         GET_ARG_AFTER(opt, "-mfpmath=");
 937                                         if (streq(opt, "387"))
 938                                                 opt = "x87";
 939                                         else if (streq(opt, "sse"))
 940                                                 opt = "sse2";
 941                                         else {
 942                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 943                                                 argument_errors = true;
 944                                         }
 945                                         if (!argument_errors) {
 946                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 947                                                 int res = firm_be_option(arch_opt);
 948                                                 if (res == 0)
 949                                                         argument_errors = true;
 950                                         }
 951                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 952                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 953                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 954                                         int res = firm_be_option(arch_opt);
 955                                         if (res == 0)
 956                                                 argument_errors = true;
 957                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 958                                         set_be_option("omitleaffp=1");
 959                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 960                                         set_be_option("omitleaffp=0");
 961                                 } else {
 962                                         char *endptr;
 963                                         long int value = strtol(opt, &endptr, 10);
 964                                         if (*endptr != '\0') {
 965                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 966                                                 argument_errors = true;
 967                                         }
 968                                         if (value != 16 && value != 32 && value != 64) {
 969                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 970                                                 argument_errors = true;
 971                                         } else {
 972                                                 machine_size = (unsigned int)value;
 973                                         }
 974                                 }
 975                         } else if (streq(option, "pg")) {
 976                                 set_be_option("gprof");
 977                                 add_flag(&ldflags_obst, "-pg");
 978                         } else if (streq(option, "pedantic") ||
 979                                    streq(option, "ansi")) {
 980                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 981                         } else if (streq(option, "shared")) {
 982                                 add_flag(&ldflags_obst, "-shared");
 983                         } else if (strstart(option, "std=")) {
 984                                 const char *const o = &option[4];
 985                                 standard =
 986                                         streq(o, "c++")            ? STANDARD_CXX98   :
 987                                         streq(o, "c++98")          ? STANDARD_CXX98   :
 988                                         streq(o, "c89")            ? STANDARD_C89     :
 989                                         streq(o, "c99")            ? STANDARD_C99     :
 990                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
 991                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
 992                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
 993                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
 994                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
 995                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
 996                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
 997                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
 998                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
 999                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1000                         } else if (streq(option, "version")) {
1001                                 print_cparser_version();
1002                         } else if (strstart(option, "print-file-name=")) {
1003                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1004                         } else if (option[0] == '-') {
1005                                 /* double dash option */
1006                                 ++option;
1007                                 if (streq(option, "gcc")) {
1008                                         features_on  |=  _GNUC;
1009                                         features_off &= ~_GNUC;
1010                                 } else if (streq(option, "no-gcc")) {
1011                                         features_on  &= ~_GNUC;
1012                                         features_off |=  _GNUC;
1013                                 } else if (streq(option, "ms")) {
1014                                         features_on  |=  _MS;
1015                                         features_off &= ~_MS;
1016                                 } else if (streq(option, "no-ms")) {
1017                                         features_on  &= ~_MS;
1018                                         features_off |=  _MS;
1019                                 } else if (streq(option, "signed-chars")) {
1020                                         char_is_signed = true;
1021                                 } else if (streq(option, "unsigned-chars")) {
1022                                         char_is_signed = false;
1023                                 } else if (streq(option, "strict")) {
1024                                         strict_mode = true;
1025                                 } else if (streq(option, "lextest")) {
1026                                         mode = LexTest;
1027                                 } else if (streq(option, "benchmark")) {
1028                                         mode = BenchmarkParser;
1029                                 } else if (streq(option, "print-ast")) {
1030                                         mode = PrintAst;
1031                                 } else if (streq(option, "print-implicit-cast")) {
1032                                         print_implicit_casts = true;
1033                                 } else if (streq(option, "print-parenthesis")) {
1034                                         print_parenthesis = true;
1035                                 } else if (streq(option, "print-fluffy")) {
1036                                         mode = PrintFluffy;
1037                                 } else if (streq(option, "print-caml")) {
1038                                         mode = PrintCaml;
1039                                 } else if (streq(option, "version")) {
1040                                         print_cparser_version();
1041                                         exit(EXIT_SUCCESS);
1042                                 } else if (streq(option, "dump-function")) {
1043                                         ++i;
1044                                         if (i >= argc) {
1045                                                 fprintf(stderr, "error: "
1046                                                         "expected argument after '--dump-function'\n");
1047                                                 argument_errors = true;
1048                                                 break;
1049                                         }
1050                                         dumpfunction = argv[i];
1051                                         mode         = CompileDump;
1052                                 } else {
1053                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1054                                         argument_errors = true;
1055                                 }
1056                         } else {
1057                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1058                                 argument_errors = true;
1059                         }
1060                 } else {
1061                         filetype_t type = forced_filetype;
1062                         if (type == FILETYPE_AUTODETECT) {
1063                                 if (streq(arg, "-")) {
1064                                         /* - implicitly means C source file */
1065                                         type = FILETYPE_C;
1066                                 } else {
1067                                         const char *suffix = strrchr(arg, '.');
1068                                         /* Ensure there is at least one char before the suffix */
1069                                         if (suffix != NULL && suffix != arg) {
1070                                                 ++suffix;
1071                                                 type =
1072                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1073                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1074                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1075                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1076                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1077                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1078                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1079                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1080                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1081                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1082                                                         FILETYPE_AUTODETECT;
1083                                         }
1084                                 }
1085
1086                                 if (type == FILETYPE_AUTODETECT) {
1087                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
1088                                         continue;
1089                                 }
1090                         }
1091
1092                         file_list_entry_t *entry
1093                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1094                         memset(entry, 0, sizeof(entry[0]));
1095                         entry->name = arg;
1096                         entry->type = type;
1097
1098                         if (last_file != NULL) {
1099                                 last_file->next = entry;
1100                         } else {
1101                                 files = entry;
1102                         }
1103                         last_file = entry;
1104                 }
1105         }
1106
1107         if (print_file_name_file != NULL) {
1108                 print_file_name(print_file_name_file);
1109                 return 0;
1110         }
1111
1112         if (files == NULL) {
1113                 fprintf(stderr, "error: no input files specified\n");
1114                 argument_errors = true;
1115         }
1116
1117         if (help_displayed) {
1118                 return !argument_errors;
1119         }
1120         if (argument_errors) {
1121                 usage(argv[0]);
1122                 return 1;
1123         }
1124
1125         /* we do the lowering in ast2firm */
1126         firm_opt.lower_bitfields = FALSE;
1127
1128         gen_firm_init();
1129         init_symbol_table();
1130         init_types();
1131         init_typehash();
1132         init_basic_types();
1133         init_lexer();
1134         init_ast();
1135         init_parser();
1136         init_ast2firm();
1137         init_mangle();
1138
1139         if (construct_dep_target) {
1140                 if (outname != 0 && strlen(outname) >= 2) {
1141                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1142                 } else {
1143                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1144                 }
1145         } else {
1146                 dep_target[0] = '\0';
1147         }
1148
1149         char outnamebuf[4096];
1150         if (outname == NULL) {
1151                 const char *filename = files->name;
1152
1153                 switch(mode) {
1154                 case BenchmarkParser:
1155                 case PrintAst:
1156                 case PrintFluffy:
1157                 case PrintCaml:
1158                 case LexTest:
1159                 case PreprocessOnly:
1160                 case ParseOnly:
1161                         outname = "-";
1162                         break;
1163                 case Compile:
1164                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1165                         outname = outnamebuf;
1166                         break;
1167                 case CompileAssemble:
1168                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1169                         outname = outnamebuf;
1170                         break;
1171                 case CompileDump:
1172                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1173                                         ".vcg");
1174                         outname = outnamebuf;
1175                         break;
1176                 case CompileAssembleLink:
1177 #ifdef _WIN32
1178                         outname = "a.exe";
1179 #else
1180                         outname = "a.out";
1181 #endif
1182                         break;
1183                 }
1184         }
1185
1186         assert(outname != NULL);
1187
1188         FILE *out;
1189         if (streq(outname, "-")) {
1190                 out = stdout;
1191         } else {
1192                 out = fopen(outname, "w");
1193                 if (out == NULL) {
1194                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1195                                         strerror(errno));
1196                         return 1;
1197                 }
1198         }
1199
1200         file_list_entry_t *file;
1201         for (file = files; file != NULL; file = file->next) {
1202                 char        asm_tempfile[1024];
1203                 const char *filename = file->name;
1204                 filetype_t  filetype = file->type;
1205
1206                 if (filetype == FILETYPE_OBJECT)
1207                         continue;
1208
1209                 FILE *in = NULL;
1210                 if (mode == LexTest) {
1211                         if (in == NULL)
1212                                 in = open_file(filename);
1213                         lextest(in, filename);
1214                         fclose(in);
1215                         exit(EXIT_SUCCESS);
1216                 }
1217
1218                 FILE *preprocessed_in = NULL;
1219                 switch (filetype) {
1220                         case FILETYPE_C:
1221                                 filetype = FILETYPE_PREPROCESSED_C;
1222                                 goto preprocess;
1223                         case FILETYPE_CXX:
1224                                 filetype = FILETYPE_PREPROCESSED_CXX;
1225                                 goto preprocess;
1226                         case FILETYPE_ASSEMBLER:
1227                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1228                                 add_flag(&cppflags_obst, "-x");
1229                                 add_flag(&cppflags_obst, "assembler-with-cpp");
1230                                 goto preprocess;
1231 preprocess:
1232                                 /* no support for input on FILE* yet */
1233                                 if (in != NULL)
1234                                         panic("internal compiler error: in for preprocessor != NULL");
1235
1236                                 preprocessed_in = preprocess(filename);
1237                                 if (mode == PreprocessOnly) {
1238                                         copy_file(out, preprocessed_in);
1239                                         int result = pclose(preprocessed_in);
1240                                         fclose(out);
1241                                         /* remove output file in case of error */
1242                                         if (out != stdout && result != EXIT_SUCCESS) {
1243                                                 unlink(outname);
1244                                         }
1245                                         return result;
1246                                 }
1247
1248                                 in = preprocessed_in;
1249                                 break;
1250
1251                         default:
1252                                 break;
1253                 }
1254
1255                 FILE *asm_out;
1256                 if (mode == Compile) {
1257                         asm_out = out;
1258                 } else {
1259                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1260                 }
1261
1262                 if (in == NULL)
1263                         in = open_file(filename);
1264
1265                 /* preprocess and compile */
1266                 if (filetype == FILETYPE_PREPROCESSED_C) {
1267                         char const* invalid_mode;
1268                         switch (standard) {
1269                                 case STANDARD_ANSI:
1270                                 case STANDARD_C89:   c_mode = _C89;                break;
1271                                 /* TODO ^v determine difference between these two */
1272                                 case STANDARD_C90:   c_mode = _C89;                break;
1273                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1274                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1275
1276 default_c_warn:
1277                                         fprintf(stderr,
1278                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1279                                                         invalid_mode);
1280                                         /* FALLTHROUGH */
1281                                 case STANDARD_DEFAULT:
1282                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1283
1284                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1285                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1286                         }
1287                         goto do_parsing;
1288                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1289                         char const* invalid_mode;
1290                         switch (standard) {
1291                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1292                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1293                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1294                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1295                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1296
1297                                 case STANDARD_ANSI:
1298                                 case STANDARD_CXX98: c_mode = _CXX; break;
1299
1300 default_cxx_warn:
1301                                         fprintf(stderr,
1302                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1303                                                         invalid_mode);
1304                                 case STANDARD_DEFAULT:
1305                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1306                         }
1307
1308 do_parsing:
1309                         c_mode |= features_on;
1310                         c_mode &= ~features_off;
1311                         init_tokens();
1312                         translation_unit_t *const unit = do_parsing(in, filename);
1313
1314                         /* prints the AST even if errors occurred */
1315                         if (mode == PrintAst) {
1316                                 type_set_output(out);
1317                                 ast_set_output(out);
1318                                 print_ast(unit);
1319                         }
1320
1321                         if (error_count > 0) {
1322                                 /* parsing failed because of errors */
1323                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1324                                         warning_count);
1325                                 result = EXIT_FAILURE;
1326                                 continue;
1327                         } else if (warning_count > 0) {
1328                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1329                         }
1330
1331                         if (in == preprocessed_in) {
1332                                 int pp_result = pclose(preprocessed_in);
1333                                 if (pp_result != EXIT_SUCCESS) {
1334                                         /* remove output file */
1335                                         if (out != stdout)
1336                                                 unlink(outname);
1337                                         exit(EXIT_FAILURE);
1338                                 }
1339                         }
1340
1341                         if (mode == BenchmarkParser) {
1342                                 return result;
1343                         } else if (mode == PrintFluffy) {
1344                                 write_fluffy_decls(out, unit);
1345                                 continue;
1346                         } else if (mode == PrintCaml) {
1347                                 write_caml_decls(out, unit);
1348                                 continue;
1349                         }
1350
1351                         translation_unit_to_firm(unit);
1352
1353                         if (mode == ParseOnly) {
1354                                 continue;
1355                         }
1356
1357                         if (mode == CompileDump) {
1358                                 /* find irg */
1359                                 ident    *id     = new_id_from_str(dumpfunction);
1360                                 ir_graph *irg    = NULL;
1361                                 int       n_irgs = get_irp_n_irgs();
1362                                 for (int i = 0; i < n_irgs; ++i) {
1363                                         ir_graph *tirg   = get_irp_irg(i);
1364                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1365                                         if (irg_id == id) {
1366                                                 irg = tirg;
1367                                                 break;
1368                                         }
1369                                 }
1370
1371                                 if (irg == NULL) {
1372                                         fprintf(stderr, "No graph for function '%s' found\n",
1373                                                 dumpfunction);
1374                                         exit(1);
1375                                 }
1376
1377                                 dump_ir_block_graph_file(irg, out);
1378                                 fclose(out);
1379                                 exit(0);
1380                         }
1381
1382                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1383                                         have_const_functions);
1384                         if (asm_out != out) {
1385                                 fclose(asm_out);
1386                         }
1387                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1388                         copy_file(asm_out, in);
1389                         if (in == preprocessed_in) {
1390                                 int pp_result = pclose(preprocessed_in);
1391                                 if (pp_result != EXIT_SUCCESS) {
1392                                         /* remove output in error case */
1393                                         if (out != stdout)
1394                                                 unlink(outname);
1395                                         return pp_result;
1396                                 }
1397                         }
1398                         if (asm_out != out) {
1399                                 fclose(asm_out);
1400                         }
1401                 }
1402
1403                 if (mode == Compile)
1404                         continue;
1405
1406                 /* if we're here then we have preprocessed assembly */
1407                 filename = asm_tempfile;
1408                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1409
1410                 /* assemble */
1411                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1412                         char        temp[1024];
1413                         const char *filename_o;
1414                         if (mode == CompileAssemble) {
1415                                 fclose(out);
1416                                 filename_o = outname;
1417                         } else {
1418                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1419                                 fclose(tempf);
1420                                 filename_o = temp;
1421                         }
1422
1423                         assemble(filename_o, filename);
1424
1425                         size_t len = strlen(filename_o) + 1;
1426                         filename = obstack_copy(&file_obst, filename_o, len);
1427                         filetype = FILETYPE_OBJECT;
1428                 }
1429
1430                 /* ok we're done here, process next file */
1431                 file->name = filename;
1432                 file->type = filetype;
1433         }
1434
1435         if (result != EXIT_SUCCESS) {
1436                 if (out != stdout)
1437                         unlink(outname);
1438                 return result;
1439         }
1440
1441         /* link program file */
1442         if (mode == CompileAssembleLink) {
1443                 obstack_1grow(&ldflags_obst, '\0');
1444                 const char *flags = obstack_finish(&ldflags_obst);
1445
1446                 /* construct commandline */
1447                 obstack_printf(&file_obst, "%s", LINKER);
1448                 for (file_list_entry_t *entry = files; entry != NULL;
1449                                 entry = entry->next) {
1450                         if (entry->type != FILETYPE_OBJECT)
1451                                 continue;
1452
1453                         add_flag(&file_obst, "%s", entry->name);
1454                 }
1455
1456                 add_flag(&file_obst, "-o");
1457                 add_flag(&file_obst, outname);
1458                 obstack_printf(&file_obst, "%s", flags);
1459                 obstack_1grow(&file_obst, '\0');
1460
1461                 char *commandline = obstack_finish(&file_obst);
1462
1463                 if (verbose) {
1464                         puts(commandline);
1465                 }
1466                 int err = system(commandline);
1467                 if (err != EXIT_SUCCESS) {
1468                         fprintf(stderr, "linker reported an error\n");
1469                         exit(1);
1470                 }
1471         }
1472
1473         obstack_free(&cppflags_obst, NULL);
1474         obstack_free(&ldflags_obst, NULL);
1475         obstack_free(&file_obst, NULL);
1476
1477         exit_mangle();
1478         exit_ast2firm();
1479         exit_parser();
1480         exit_ast();
1481         exit_lexer();
1482         exit_typehash();
1483         exit_types();
1484         exit_tokens();
1485         exit_symbol_table();
1486         return 0;
1487 }