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[4096];
 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                 obstack_printf(&cppflags_obst, " %s", flags);
 322         }
 323         add_flag(&cppflags_obst, fname);
 324
 325         obstack_1grow(&cppflags_obst, '\0');
 326         const char *buf = obstack_finish(&cppflags_obst);
 327         if (verbose) {
 328                 puts(buf);
 329         }
 330
 331         FILE *f = popen(buf, "r");
 332         if (f == NULL) {
 333                 fprintf(stderr, "invoking preprocessor failed\n");
 334                 exit(1);
 335         }
 336
 337         return f;
 338 }
 339
 340 static void assemble(const char *out, const char *in)
 341 {
 342         char buf[4096];
 343
 344         snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
 345         if (verbose) {
 346                 puts(buf);
 347         }
 348
 349         int err = system(buf);
 350         if (err != 0) {
 351                 fprintf(stderr, "assembler reported an error\n");
 352                 exit(1);
 353         }
 354 }
 355
 356 static void print_file_name(const char *file)
 357 {
 358         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 359
 360         obstack_1grow(&ldflags_obst, '\0');
 361         const char *flags = obstack_finish(&ldflags_obst);
 362
 363         /* construct commandline */
 364         obstack_printf(&ldflags_obst, "%s ", LINKER);
 365         obstack_printf(&ldflags_obst, "%s", flags);
 366         obstack_1grow(&ldflags_obst, '\0');
 367
 368         char *commandline = obstack_finish(&ldflags_obst);
 369
 370         if (verbose) {
 371                 puts(commandline);
 372         }
 373         int err = system(commandline);
 374         if (err != EXIT_SUCCESS) {
 375                 fprintf(stderr, "linker reported an error\n");
 376                 exit(1);
 377         }
 378 }
 379
 380 static const char *try_dir(const char *dir)
 381 {
 382         if (dir == NULL)
 383                 return dir;
 384         if (access(dir, R_OK | W_OK | X_OK) == 0)
 385                 return dir;
 386         return NULL;
 387 }
 388
 389 static const char *get_tempdir(void)
 390 {
 391         static const char *tmpdir = NULL;
 392
 393         if (tmpdir != NULL)
 394                 return tmpdir;
 395
 396         if (tmpdir == NULL)
 397                 tmpdir = try_dir(getenv("TMPDIR"));
 398         if (tmpdir == NULL)
 399                 tmpdir = try_dir(getenv("TMP"));
 400         if (tmpdir == NULL)
 401                 tmpdir = try_dir(getenv("TEMP"));
 402
 403 #ifdef P_tmpdir
 404         if (tmpdir == NULL)
 405                 tmpdir = try_dir(P_tmpdir);
 406 #endif
 407
 408         if (tmpdir == NULL)
 409                 tmpdir = try_dir("/var/tmp");
 410         if (tmpdir == NULL)
 411                 tmpdir = try_dir("/usr/tmp");
 412         if (tmpdir == NULL)
 413                 tmpdir = try_dir("/tmp");
 414
 415         if (tmpdir == NULL)
 416                 tmpdir = ".";
 417
 418         return tmpdir;
 419 }
 420
 421 #ifndef HAVE_MKSTEMP
 422 /* cheap and nasty mkstemp replacement */
 423 static int mkstemp(char *templ)
 424 {
 425         mktemp(templ);
 426         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 427 }
 428 #endif
 429
 430 /**
 431  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 432  * during linking (like glibc/gnu ld do for tmpnam)...
 433  */
 434 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 435 {
 436         const char *tempdir = get_tempdir();
 437
 438         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 439
 440         int fd = mkstemp(buffer);
 441         if (fd == -1) {
 442                 fprintf(stderr, "couldn't create temporary file: %s\n",
 443                         strerror(errno));
 444                 exit(1);
 445         }
 446         FILE *out = fdopen(fd, "w");
 447         if (out == NULL) {
 448                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 449                 exit(1);
 450         }
 451
 452         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 453         memset(entry, 0, sizeof(*entry));
 454
 455         size_t  name_len = strlen(buffer) + 1;
 456         char   *name     = malloc(name_len);
 457         memcpy(name, buffer, name_len);
 458         entry->name      = name;
 459
 460         entry->next = temp_files;
 461         temp_files  = entry;
 462
 463         return out;
 464 }
 465
 466 static void free_temp_files(void)
 467 {
 468         file_list_entry_t *entry = temp_files;
 469         file_list_entry_t *next;
 470         for ( ; entry != NULL; entry = next) {
 471                 next = entry->next;
 472
 473                 unlink(entry->name);
 474                 free((char*) entry->name);
 475                 free(entry);
 476         }
 477         temp_files = NULL;
 478 }
 479
 480 /**
 481  * Do the necessary lowering for compound parameters.
 482  */
 483 void lower_compound_params(void)
 484 {
 485         lower_params_t params;
 486
 487         params.def_ptr_alignment    = 4;
 488         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 489         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 490         params.find_pointer_type    = NULL;
 491         params.ret_compound_in_regs = NULL;
 492         lower_calls_with_compounds(&params);
 493 }
 494
 495 typedef enum compile_mode_t {
 496         BenchmarkParser,
 497         PreprocessOnly,
 498         ParseOnly,
 499         Compile,
 500         CompileDump,
 501         CompileAssemble,
 502         CompileAssembleLink,
 503         LexTest,
 504         PrintAst,
 505         PrintFluffy,
 506         PrintCaml,
 507         PrintJna
 508 } compile_mode_t;
 509
 510 static void usage(const char *argv0)
 511 {
 512         fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 513 }
 514
 515 static void print_cparser_version(void) {
 516         printf("cparser (%s) using libFirm (%u.%u",
 517                cparser_REVISION, ir_get_version_major(),
 518                ir_get_version_minor());
 519
 520         const char *revision = ir_get_version_revision();
 521         if (revision[0] != 0) {
 522                 putchar(' ');
 523                 fputs(revision, stdout);
 524         }
 525
 526         const char *build = ir_get_version_build();
 527         if (build[0] != 0) {
 528                 putchar(' ');
 529                 fputs(build, stdout);
 530         }
 531         puts(")\n");
 532 }
 533
 534 static void set_be_option(const char *arg)
 535 {
 536         int res = firm_be_option(arg);
 537         (void) res;
 538         assert(res);
 539 }
 540
 541 static void set_option(const char *arg)
 542 {
 543         int res = firm_option(arg);
 544         (void) res;
 545         assert(res);
 546 }
 547
 548 static void copy_file(FILE *dest, FILE *input)
 549 {
 550         char buf[16384];
 551
 552         while (!feof(input) && !ferror(dest)) {
 553                 size_t read = fread(buf, 1, sizeof(buf), input);
 554                 if (fwrite(buf, 1, read, dest) != read) {
 555                         perror("couldn't write output");
 556                 }
 557         }
 558 }
 559
 560 static inline bool streq(char const* a, char const* b)
 561 {
 562         return strcmp(a, b) == 0;
 563 }
 564
 565 static inline bool strstart(char const* str, char const* start)
 566 {
 567         do {
 568                 if (*start == '\0')
 569                         return true;
 570         } while (*str++ == *start++);
 571         return false;
 572 }
 573
 574 static FILE *open_file(const char *filename)
 575 {
 576         if (streq(filename, "-")) {
 577                 return stdin;
 578         }
 579
 580         FILE *in = fopen(filename, "r");
 581         if (in == NULL) {
 582                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 583                                 strerror(errno));
 584                 exit(1);
 585         }
 586
 587         return in;
 588 }
 589
 590 static filetype_t get_filetype_from_string(const char *string)
 591 {
 592         if (streq(string, "c") || streq(string, "c-header"))
 593                 return FILETYPE_C;
 594         if (streq(string, "c++") || streq(string, "c++-header"))
 595                 return FILETYPE_CXX;
 596         if (streq(string, "assembler"))
 597                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 598         if (streq(string, "assembler-with-cpp"))
 599                 return FILETYPE_ASSEMBLER;
 600         if (streq(string, "none"))
 601                 return FILETYPE_AUTODETECT;
 602
 603         return FILETYPE_UNKNOWN;
 604 }
 605
 606 static void init_os_support(void)
 607 {
 608         /* OS option must be set to the backend */
 609         switch (firm_opt.os_support) {
 610         case OS_SUPPORT_MINGW:
 611                 set_be_option("ia32-gasmode=mingw");
 612                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 613                 break;
 614         case OS_SUPPORT_LINUX:
 615                 set_be_option("ia32-gasmode=elf");
 616                 break;
 617         case OS_SUPPORT_MACHO:
 618                 set_be_option("ia32-gasmode=macho");
 619                 set_be_option("ia32-stackalign=4");
 620                 set_be_option("pic");
 621                 break;
 622         }
 623 }
 624
 625 typedef enum lang_standard_t {
 626         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 627         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 628         STANDARD_C89,     /* ISO C90 (sic) */
 629         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 630         STANDARD_C99,     /* ISO C99 */
 631         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 632         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 633         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 634         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 635 } lang_standard_t;
 636
 637 int main(int argc, char **argv)
 638 {
 639         initialize_firm();
 640
 641         const char        *dumpfunction         = NULL;
 642         const char        *print_file_name_file = NULL;
 643         compile_mode_t     mode                 = CompileAssembleLink;
 644         int                opt_level            = 1;
 645         int                result               = EXIT_SUCCESS;
 646         char               cpu_arch[16]         = "ia32";
 647         file_list_entry_t *files                = NULL;
 648         file_list_entry_t *last_file            = NULL;
 649         bool               construct_dep_target = false;
 650         struct obstack     file_obst;
 651
 652         atexit(free_temp_files);
 653
 654         /* hack for now... */
 655         if (strstr(argv[0], "pptest") != NULL) {
 656                 extern int pptest_main(int argc, char **argv);
 657                 return pptest_main(argc, argv);
 658         }
 659
 660         obstack_init(&cppflags_obst);
 661         obstack_init(&ldflags_obst);
 662         obstack_init(&file_obst);
 663
 664 #define GET_ARG_AFTER(def, args)                                             \
 665         def = &arg[sizeof(args)-1];                                              \
 666         if (def[0] == '\0') {                                                     \
 667                 ++i;                                                                 \
 668                 if (i >= argc) {                                                      \
 669                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 670                         argument_errors = true;                                          \
 671                         break;                                                           \
 672                 }                                                                    \
 673                 def = argv[i];                                                       \
 674                 if (def[0] == '-' && def[1] != '\0') {                                \
 675                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 676                         argument_errors = true;                                          \
 677                         continue;                                                        \
 678                 }                                                                    \
 679         }
 680
 681 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 682
 683         /* early options parsing (find out optimisation level and OS) */
 684         for (int i = 1; i < argc; ++i) {
 685                 const char *arg = argv[i];
 686                 if (arg[0] != '-')
 687                         continue;
 688
 689                 const char *option = &arg[1];
 690                 if (option[0] == 'O') {
 691                         sscanf(&option[1], "%d", &opt_level);
 692                 }
 693                 if (strcmp(arg, "-fwin32") == 0) {
 694                         firm_opt.os_support = OS_SUPPORT_MINGW;
 695                 } else if (strcmp(arg, "-fmac") == 0) {
 696                         firm_opt.os_support = OS_SUPPORT_MACHO;
 697                 } else if (strcmp(arg, "-flinux") == 0) {
 698                         firm_opt.os_support = OS_SUPPORT_LINUX;
 699                 }
 700         }
 701
 702         /* set target/os specific stuff */
 703         init_os_support();
 704
 705         /* apply optimisation level */
 706         switch(opt_level) {
 707         case 0:
 708                 set_option("no-opt");
 709                 break;
 710         case 1:
 711                 set_option("no-inline");
 712                 break;
 713         default:
 714         case 4:
 715                 set_option("strict-aliasing");
 716                 /* use_builtins = true; */
 717                 /* fallthrough */
 718         case 3:
 719                 set_option("cond-eval");
 720                 set_option("if-conv");
 721                 /* fallthrough */
 722         case 2:
 723                 set_option("inline");
 724                 set_option("deconv");
 725                 set_be_option("omitfp");
 726                 break;
 727         }
 728
 729         /* parse rest of options */
 730         lang_standard_t standard        = STANDARD_DEFAULT;
 731         unsigned        features_on     = 0;
 732         unsigned        features_off    = 0;
 733         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 734         bool            help_displayed  = false;
 735         bool            argument_errors = false;
 736         for (int i = 1; i < argc; ++i) {
 737                 const char *arg = argv[i];
 738                 if (arg[0] == '-' && arg[1] != '\0') {
 739                         /* an option */
 740                         const char *option = &arg[1];
 741                         if (option[0] == 'o') {
 742                                 GET_ARG_AFTER(outname, "-o");
 743                         } else if (option[0] == 'g') {
 744                                 set_be_option("debuginfo=stabs");
 745                                 set_be_option("omitfp=no");
 746                                 set_be_option("ia32-nooptcc=yes");
 747                         } else if (SINGLE_OPTION('c')) {
 748                                 mode = CompileAssemble;
 749                         } else if (SINGLE_OPTION('E')) {
 750                                 mode = PreprocessOnly;
 751                         } else if (SINGLE_OPTION('S')) {
 752                                 mode = Compile;
 753                         } else if (option[0] == 'O') {
 754                                 continue;
 755                         } else if (option[0] == 'I') {
 756                                 const char *opt;
 757                                 GET_ARG_AFTER(opt, "-I");
 758                                 add_flag(&cppflags_obst, "-I%s", opt);
 759                         } else if (option[0] == 'D') {
 760                                 const char *opt;
 761                                 GET_ARG_AFTER(opt, "-D");
 762                                 add_flag(&cppflags_obst, "-D%s", opt);
 763                         } else if (option[0] == 'U') {
 764                                 const char *opt;
 765                                 GET_ARG_AFTER(opt, "-U");
 766                                 add_flag(&cppflags_obst, "-U%s", opt);
 767                         } else if (option[0] == 'l') {
 768                                 const char *opt;
 769                                 GET_ARG_AFTER(opt, "-l");
 770                                 add_flag(&ldflags_obst, "-l%s", opt);
 771                         } else if (option[0] == 'L') {
 772                                 const char *opt;
 773                                 GET_ARG_AFTER(opt, "-L");
 774                                 add_flag(&ldflags_obst, "-L%s", opt);
 775                         } else if (SINGLE_OPTION('v')) {
 776                                 verbose = 1;
 777                         } else if (SINGLE_OPTION('w')) {
 778                                 memset(&warning, 0, sizeof(warning));
 779                         } else if (option[0] == 'x') {
 780                                 const char *opt;
 781                                 GET_ARG_AFTER(opt, "-x");
 782                                 forced_filetype = get_filetype_from_string(opt);
 783                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 784                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 785                                         argument_errors = true;
 786                                 }
 787                         } else if (streq(option, "M")) {
 788                                 mode = PreprocessOnly;
 789                                 add_flag(&cppflags_obst, "-M");
 790                         } else if (streq(option, "MMD") ||
 791                                    streq(option, "MD")) {
 792                             construct_dep_target = true;
 793                                 add_flag(&cppflags_obst, "-%s", option);
 794                         } else if (streq(option, "MM")  ||
 795                                    streq(option, "MP")) {
 796                                 add_flag(&cppflags_obst, "-%s", option);
 797                         } else if (streq(option, "MT") ||
 798                                    streq(option, "MQ") ||
 799                                    streq(option, "MF")) {
 800                                 const char *opt;
 801                                 GET_ARG_AFTER(opt, "-MT");
 802                                 add_flag(&cppflags_obst, "-%s", option);
 803                                 add_flag(&cppflags_obst, "%s", opt);
 804                         } else if (streq(option, "include")) {
 805                                 const char *opt;
 806                                 GET_ARG_AFTER(opt, "-include");
 807                                 add_flag(&cppflags_obst, "-include");
 808                                 add_flag(&cppflags_obst, "%s", opt);
 809                         } else if (streq(option, "isystem")) {
 810                                 const char *opt;
 811                                 GET_ARG_AFTER(opt, "-isystem");
 812                                 add_flag(&cppflags_obst, "-isystem");
 813                                 add_flag(&cppflags_obst, "%s", opt);
 814                         } else if (streq(option, "nostdinc")
 815                                         || streq(option, "trigraphs")) {
 816                                 /* pass these through to the preprocessor */
 817                                 add_flag(&cppflags_obst, "%s", arg);
 818                         } else if (streq(option, "pipe")) {
 819                                 /* here for gcc compatibility */
 820                         } else if (option[0] == 'f') {
 821                                 char const *orig_opt;
 822                                 GET_ARG_AFTER(orig_opt, "-f");
 823
 824                                 if (strstart(orig_opt, "align-loops=") ||
 825                                     strstart(orig_opt, "align-jumps=") ||
 826                                     strstart(orig_opt, "align-functions=")) {
 827                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 828                                 } else if (strstart(orig_opt, "input-charset=")) {
 829                                         char const* const encoding = strchr(orig_opt, '=') + 1;
 830                                         select_input_encoding(encoding);
 831                                 } else if (streq(orig_opt, "verbose-asm")) {
 832                                         /* ignore: we always print verbose assembler */
 833                                 } else {
 834                                         char const *opt         = orig_opt;
 835                                         bool        truth_value = true;
 836                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 837                                                 truth_value = false;
 838                                                 opt += 3;
 839                                         }
 840
 841                                         if (streq(opt, "dollars-in-identifiers")) {
 842                                                 allow_dollar_in_symbol = truth_value;
 843                                         } if (streq(opt, "builtins")) {
 844                                                 use_builtins = truth_value;
 845                                         } else if (streq(opt, "short-wchar")) {
 846                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 847                                                         : ATOMIC_TYPE_INT;
 848                                         } else if (streq(opt, "syntax-only")) {
 849                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 850                                         } else if (streq(opt, "omit-frame-pointer")) {
 851                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 852                                         } else if (streq(opt, "strength-reduce")) {
 853                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 854                                         } else if (streq(opt, "fast-math")               ||
 855                                                    streq(opt, "jump-tables")             ||
 856                                                    streq(opt, "unroll-loops")            ||
 857                                                    streq(opt, "expensive-optimizations") ||
 858                                                    streq(opt, "common")                  ||
 859                                                    streq(opt, "PIC")                     ||
 860                                                    streq(opt, "align-loops")             ||
 861                                                    streq(opt, "align-jumps")             ||
 862                                                    streq(opt, "align-functions")) {
 863                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 864                                         } else {
 865                                                 int res = firm_option(orig_opt);
 866                                                 if (res == 0) {
 867                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 868                                                                 orig_opt);
 869                                                         argument_errors = true;
 870                                                         continue;
 871                                                 } else if (res == -1) {
 872                                                         help_displayed = true;
 873                                                 }
 874                                         }
 875                                 }
 876                         } else if (option[0] == 'b') {
 877                                 const char *opt;
 878                                 GET_ARG_AFTER(opt, "-b");
 879                                 int res = firm_be_option(opt);
 880                                 if (res == 0) {
 881                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 882                                                 opt);
 883                                         argument_errors = true;
 884                                 } else if (res == -1) {
 885                                         help_displayed = true;
 886                                 } else if (strstart(opt, "isa=")) {
 887                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 888                                 }
 889                         } else if (option[0] == 'W') {
 890                                 if (strstart(option + 1, "p,")) {
 891                                         // pass options directly to the preprocessor
 892                                         const char *opt;
 893                                         GET_ARG_AFTER(opt, "-Wp,");
 894                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 895                                 } else if (strstart(option + 1, "l,")) {
 896                                         // pass options directly to the linker
 897                                         const char *opt;
 898                                         GET_ARG_AFTER(opt, "-Wl,");
 899                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 900                                 } else if (streq(option + 1, "no-trigraphs")
 901                                                         || streq(option + 1, "undef")) {
 902                                         add_flag(&cppflags_obst, "%s", arg);
 903                                 } else {
 904                                         set_warning_opt(&option[1]);
 905                                 }
 906                         } else if (option[0] == 'm') {
 907                                 /* -m options */
 908                                 const char *opt;
 909                                 char arch_opt[64];
 910
 911                                 GET_ARG_AFTER(opt, "-m");
 912                                 if (strstart(opt, "arch=")) {
 913                                         GET_ARG_AFTER(opt, "-march=");
 914                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 915                                         int res = firm_be_option(arch_opt);
 916                                         if (res == 0)
 917                                                 argument_errors = true;
 918                                         else {
 919                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 920                                                 int res = firm_be_option(arch_opt);
 921                                                 if (res == 0)
 922                                                         argument_errors = true;
 923                                         }
 924                                 } else if (strstart(opt, "tune=")) {
 925                                         GET_ARG_AFTER(opt, "-mtune=");
 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                                 } else if (strstart(opt, "cpu=")) {
 931                                         GET_ARG_AFTER(opt, "-mcpu=");
 932                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 933                                         int res = firm_be_option(arch_opt);
 934                                         if (res == 0)
 935                                                 argument_errors = true;
 936                                 } else if (strstart(opt, "fpmath=")) {
 937                                         GET_ARG_AFTER(opt, "-mfpmath=");
 938                                         if (streq(opt, "387"))
 939                                                 opt = "x87";
 940                                         else if (streq(opt, "sse"))
 941                                                 opt = "sse2";
 942                                         else {
 943                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 944                                                 argument_errors = true;
 945                                         }
 946                                         if (!argument_errors) {
 947                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 948                                                 int res = firm_be_option(arch_opt);
 949                                                 if (res == 0)
 950                                                         argument_errors = true;
 951                                         }
 952                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 953                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 954                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 955                                         int res = firm_be_option(arch_opt);
 956                                         if (res == 0)
 957                                                 argument_errors = true;
 958                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
 959                                         set_be_option("omitleaffp=1");
 960                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
 961                                         set_be_option("omitleaffp=0");
 962                                 } else {
 963                                         char *endptr;
 964                                         long int value = strtol(opt, &endptr, 10);
 965                                         if (*endptr != '\0') {
 966                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
 967                                                 argument_errors = true;
 968                                         }
 969                                         if (value != 16 && value != 32 && value != 64) {
 970                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
 971                                                 argument_errors = true;
 972                                         } else {
 973                                                 machine_size = (unsigned int)value;
 974                                         }
 975                                 }
 976                         } else if (streq(option, "pg")) {
 977                                 set_be_option("gprof");
 978                                 add_flag(&ldflags_obst, "-pg");
 979                         } else if (streq(option, "pedantic") ||
 980                                    streq(option, "ansi")) {
 981                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
 982                         } else if (streq(option, "shared")) {
 983                                 add_flag(&ldflags_obst, "-shared");
 984                         } else if (strstart(option, "std=")) {
 985                                 const char *const o = &option[4];
 986                                 standard =
 987                                         streq(o, "c++")            ? STANDARD_CXX98   :
 988                                         streq(o, "c++98")          ? STANDARD_CXX98   :
 989                                         streq(o, "c89")            ? STANDARD_C89     :
 990                                         streq(o, "c99")            ? STANDARD_C99     :
 991                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
 992                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
 993                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
 994                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
 995                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
 996                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
 997                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
 998                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
 999                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1000                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1001                         } else if (streq(option, "version")) {
1002                                 print_cparser_version();
1003                         } else if (strstart(option, "print-file-name=")) {
1004                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1005                         } else if (option[0] == '-') {
1006                                 /* double dash option */
1007                                 ++option;
1008                                 if (streq(option, "gcc")) {
1009                                         features_on  |=  _GNUC;
1010                                         features_off &= ~_GNUC;
1011                                 } else if (streq(option, "no-gcc")) {
1012                                         features_on  &= ~_GNUC;
1013                                         features_off |=  _GNUC;
1014                                 } else if (streq(option, "ms")) {
1015                                         features_on  |=  _MS;
1016                                         features_off &= ~_MS;
1017                                 } else if (streq(option, "no-ms")) {
1018                                         features_on  &= ~_MS;
1019                                         features_off |=  _MS;
1020                                 } else if (streq(option, "signed-chars")) {
1021                                         char_is_signed = true;
1022                                 } else if (streq(option, "unsigned-chars")) {
1023                                         char_is_signed = false;
1024                                 } else if (streq(option, "strict")) {
1025                                         strict_mode = true;
1026                                 } else if (streq(option, "lextest")) {
1027                                         mode = LexTest;
1028                                 } else if (streq(option, "benchmark")) {
1029                                         mode = BenchmarkParser;
1030                                 } else if (streq(option, "print-ast")) {
1031                                         mode = PrintAst;
1032                                 } else if (streq(option, "print-implicit-cast")) {
1033                                         print_implicit_casts = true;
1034                                 } else if (streq(option, "print-parenthesis")) {
1035                                         print_parenthesis = true;
1036                                 } else if (streq(option, "print-fluffy")) {
1037                                         mode = PrintFluffy;
1038                                 } else if (streq(option, "print-caml")) {
1039                                         mode = PrintCaml;
1040                                 } else if (streq(option, "print-jna")) {
1041                                         mode = PrintJna;
1042                                 } else if (streq(option, "version")) {
1043                                         print_cparser_version();
1044                                         exit(EXIT_SUCCESS);
1045                                 } else if (streq(option, "dump-function")) {
1046                                         ++i;
1047                                         if (i >= argc) {
1048                                                 fprintf(stderr, "error: "
1049                                                         "expected argument after '--dump-function'\n");
1050                                                 argument_errors = true;
1051                                                 break;
1052                                         }
1053                                         dumpfunction = argv[i];
1054                                         mode         = CompileDump;
1055                                 } else {
1056                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1057                                         argument_errors = true;
1058                                 }
1059                         } else {
1060                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1061                                 argument_errors = true;
1062                         }
1063                 } else {
1064                         filetype_t type = forced_filetype;
1065                         if (type == FILETYPE_AUTODETECT) {
1066                                 if (streq(arg, "-")) {
1067                                         /* - implicitly means C source file */
1068                                         type = FILETYPE_C;
1069                                 } else {
1070                                         const char *suffix = strrchr(arg, '.');
1071                                         /* Ensure there is at least one char before the suffix */
1072                                         if (suffix != NULL && suffix != arg) {
1073                                                 ++suffix;
1074                                                 type =
1075                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1076                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1077                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1078                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1079                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1080                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1081                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1082                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1083                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1084                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1085                                                         FILETYPE_AUTODETECT;
1086                                         }
1087                                 }
1088
1089                                 if (type == FILETYPE_AUTODETECT) {
1090                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
1091                                         continue;
1092                                 }
1093                         }
1094
1095                         file_list_entry_t *entry
1096                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1097                         memset(entry, 0, sizeof(entry[0]));
1098                         entry->name = arg;
1099                         entry->type = type;
1100
1101                         if (last_file != NULL) {
1102                                 last_file->next = entry;
1103                         } else {
1104                                 files = entry;
1105                         }
1106                         last_file = entry;
1107                 }
1108         }
1109
1110         if (print_file_name_file != NULL) {
1111                 print_file_name(print_file_name_file);
1112                 return 0;
1113         }
1114
1115         if (files == NULL) {
1116                 fprintf(stderr, "error: no input files specified\n");
1117                 argument_errors = true;
1118         }
1119
1120         if (help_displayed) {
1121                 return !argument_errors;
1122         }
1123         if (argument_errors) {
1124                 usage(argv[0]);
1125                 return 1;
1126         }
1127
1128         /* we do the lowering in ast2firm */
1129         firm_opt.lower_bitfields = FALSE;
1130
1131         gen_firm_init();
1132         init_symbol_table();
1133         init_types();
1134         init_typehash();
1135         init_basic_types();
1136         init_lexer();
1137         init_ast();
1138         init_parser();
1139         init_ast2firm();
1140         init_mangle();
1141
1142         if (construct_dep_target) {
1143                 if (outname != 0 && strlen(outname) >= 2) {
1144                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1145                 } else {
1146                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1147                 }
1148         } else {
1149                 dep_target[0] = '\0';
1150         }
1151
1152         char outnamebuf[4096];
1153         if (outname == NULL) {
1154                 const char *filename = files->name;
1155
1156                 switch(mode) {
1157                 case BenchmarkParser:
1158                 case PrintAst:
1159                 case PrintFluffy:
1160                 case PrintCaml:
1161                 case PrintJna:
1162                 case LexTest:
1163                 case PreprocessOnly:
1164                 case ParseOnly:
1165                         outname = "-";
1166                         break;
1167                 case Compile:
1168                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1169                         outname = outnamebuf;
1170                         break;
1171                 case CompileAssemble:
1172                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1173                         outname = outnamebuf;
1174                         break;
1175                 case CompileDump:
1176                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1177                                         ".vcg");
1178                         outname = outnamebuf;
1179                         break;
1180                 case CompileAssembleLink:
1181 #ifdef _WIN32
1182                         outname = "a.exe";
1183 #else
1184                         outname = "a.out";
1185 #endif
1186                         break;
1187                 }
1188         }
1189
1190         assert(outname != NULL);
1191
1192         FILE *out;
1193         if (streq(outname, "-")) {
1194                 out = stdout;
1195         } else {
1196                 out = fopen(outname, "w");
1197                 if (out == NULL) {
1198                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1199                                         strerror(errno));
1200                         return 1;
1201                 }
1202         }
1203
1204         file_list_entry_t *file;
1205         for (file = files; file != NULL; file = file->next) {
1206                 char        asm_tempfile[1024];
1207                 const char *filename = file->name;
1208                 filetype_t  filetype = file->type;
1209
1210                 if (filetype == FILETYPE_OBJECT)
1211                         continue;
1212
1213                 FILE *in = NULL;
1214                 if (mode == LexTest) {
1215                         if (in == NULL)
1216                                 in = open_file(filename);
1217                         lextest(in, filename);
1218                         fclose(in);
1219                         exit(EXIT_SUCCESS);
1220                 }
1221
1222                 FILE *preprocessed_in = NULL;
1223                 switch (filetype) {
1224                         case FILETYPE_C:
1225                                 filetype = FILETYPE_PREPROCESSED_C;
1226                                 goto preprocess;
1227                         case FILETYPE_CXX:
1228                                 filetype = FILETYPE_PREPROCESSED_CXX;
1229                                 goto preprocess;
1230                         case FILETYPE_ASSEMBLER:
1231                                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1232                                 add_flag(&cppflags_obst, "-x");
1233                                 add_flag(&cppflags_obst, "assembler-with-cpp");
1234                                 goto preprocess;
1235 preprocess:
1236                                 /* no support for input on FILE* yet */
1237                                 if (in != NULL)
1238                                         panic("internal compiler error: in for preprocessor != NULL");
1239
1240                                 preprocessed_in = preprocess(filename);
1241                                 if (mode == PreprocessOnly) {
1242                                         copy_file(out, preprocessed_in);
1243                                         int result = pclose(preprocessed_in);
1244                                         fclose(out);
1245                                         /* remove output file in case of error */
1246                                         if (out != stdout && result != EXIT_SUCCESS) {
1247                                                 unlink(outname);
1248                                         }
1249                                         return result;
1250                                 }
1251
1252                                 in = preprocessed_in;
1253                                 break;
1254
1255                         default:
1256                                 break;
1257                 }
1258
1259                 FILE *asm_out;
1260                 if (mode == Compile) {
1261                         asm_out = out;
1262                 } else {
1263                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1264                 }
1265
1266                 if (in == NULL)
1267                         in = open_file(filename);
1268
1269                 /* preprocess and compile */
1270                 if (filetype == FILETYPE_PREPROCESSED_C) {
1271                         char const* invalid_mode;
1272                         switch (standard) {
1273                                 case STANDARD_ANSI:
1274                                 case STANDARD_C89:   c_mode = _C89;                break;
1275                                 /* TODO ^v determine difference between these two */
1276                                 case STANDARD_C90:   c_mode = _C89;                break;
1277                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1278                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1279
1280 default_c_warn:
1281                                         fprintf(stderr,
1282                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1283                                                         invalid_mode);
1284                                         /* FALLTHROUGH */
1285                                 case STANDARD_DEFAULT:
1286                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1287
1288                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1289                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1290                         }
1291                         goto do_parsing;
1292                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1293                         char const* invalid_mode;
1294                         switch (standard) {
1295                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1296                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1297                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1298                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1299                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1300
1301                                 case STANDARD_ANSI:
1302                                 case STANDARD_CXX98: c_mode = _CXX; break;
1303
1304 default_cxx_warn:
1305                                         fprintf(stderr,
1306                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1307                                                         invalid_mode);
1308                                 case STANDARD_DEFAULT:
1309                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1310                         }
1311
1312 do_parsing:
1313                         c_mode |= features_on;
1314                         c_mode &= ~features_off;
1315                         init_tokens();
1316                         translation_unit_t *const unit = do_parsing(in, filename);
1317
1318                         /* prints the AST even if errors occurred */
1319                         if (mode == PrintAst) {
1320                                 type_set_output(out);
1321                                 ast_set_output(out);
1322                                 print_ast(unit);
1323                         }
1324
1325                         if (error_count > 0) {
1326                                 /* parsing failed because of errors */
1327                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1328                                         warning_count);
1329                                 result = EXIT_FAILURE;
1330                                 continue;
1331                         } else if (warning_count > 0) {
1332                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1333                         }
1334
1335                         if (in == preprocessed_in) {
1336                                 int pp_result = pclose(preprocessed_in);
1337                                 if (pp_result != EXIT_SUCCESS) {
1338                                         /* remove output file */
1339                                         if (out != stdout)
1340                                                 unlink(outname);
1341                                         exit(EXIT_FAILURE);
1342                                 }
1343                         }
1344
1345                         if (mode == BenchmarkParser) {
1346                                 return result;
1347                         } else if (mode == PrintFluffy) {
1348                                 write_fluffy_decls(out, unit);
1349                                 continue;
1350                         } else if (mode == PrintCaml) {
1351                                 write_caml_decls(out, unit);
1352                                 continue;
1353                         } else if (mode == PrintJna) {
1354                                 write_jna_decls(out, unit);
1355                                 continue;
1356                         }
1357
1358                         translation_unit_to_firm(unit);
1359
1360                         if (mode == ParseOnly) {
1361                                 continue;
1362                         }
1363
1364                         if (mode == CompileDump) {
1365                                 /* find irg */
1366                                 ident    *id     = new_id_from_str(dumpfunction);
1367                                 ir_graph *irg    = NULL;
1368                                 int       n_irgs = get_irp_n_irgs();
1369                                 for (int i = 0; i < n_irgs; ++i) {
1370                                         ir_graph *tirg   = get_irp_irg(i);
1371                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1372                                         if (irg_id == id) {
1373                                                 irg = tirg;
1374                                                 break;
1375                                         }
1376                                 }
1377
1378                                 if (irg == NULL) {
1379                                         fprintf(stderr, "No graph for function '%s' found\n",
1380                                                 dumpfunction);
1381                                         exit(1);
1382                                 }
1383
1384                                 dump_ir_block_graph_file(irg, out);
1385                                 fclose(out);
1386                                 exit(0);
1387                         }
1388
1389                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1390                                         have_const_functions);
1391                         if (asm_out != out) {
1392                                 fclose(asm_out);
1393                         }
1394                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1395                         copy_file(asm_out, in);
1396                         if (in == preprocessed_in) {
1397                                 int pp_result = pclose(preprocessed_in);
1398                                 if (pp_result != EXIT_SUCCESS) {
1399                                         /* remove output in error case */
1400                                         if (out != stdout)
1401                                                 unlink(outname);
1402                                         return pp_result;
1403                                 }
1404                         }
1405                         if (asm_out != out) {
1406                                 fclose(asm_out);
1407                         }
1408                 }
1409
1410                 if (mode == Compile)
1411                         continue;
1412
1413                 /* if we're here then we have preprocessed assembly */
1414                 filename = asm_tempfile;
1415                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1416
1417                 /* assemble */
1418                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1419                         char        temp[1024];
1420                         const char *filename_o;
1421                         if (mode == CompileAssemble) {
1422                                 fclose(out);
1423                                 filename_o = outname;
1424                         } else {
1425                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1426                                 fclose(tempf);
1427                                 filename_o = temp;
1428                         }
1429
1430                         assemble(filename_o, filename);
1431
1432                         size_t len = strlen(filename_o) + 1;
1433                         filename = obstack_copy(&file_obst, filename_o, len);
1434                         filetype = FILETYPE_OBJECT;
1435                 }
1436
1437                 /* ok we're done here, process next file */
1438                 file->name = filename;
1439                 file->type = filetype;
1440         }
1441
1442         if (result != EXIT_SUCCESS) {
1443                 if (out != stdout)
1444                         unlink(outname);
1445                 return result;
1446         }
1447
1448         /* link program file */
1449         if (mode == CompileAssembleLink) {
1450                 obstack_1grow(&ldflags_obst, '\0');
1451                 const char *flags = obstack_finish(&ldflags_obst);
1452
1453                 /* construct commandline */
1454                 obstack_printf(&file_obst, "%s", LINKER);
1455                 for (file_list_entry_t *entry = files; entry != NULL;
1456                                 entry = entry->next) {
1457                         if (entry->type != FILETYPE_OBJECT)
1458                                 continue;
1459
1460                         add_flag(&file_obst, "%s", entry->name);
1461                 }
1462
1463                 add_flag(&file_obst, "-o");
1464                 add_flag(&file_obst, outname);
1465                 obstack_printf(&file_obst, "%s", flags);
1466                 obstack_1grow(&file_obst, '\0');
1467
1468                 char *commandline = obstack_finish(&file_obst);
1469
1470                 if (verbose) {
1471                         puts(commandline);
1472                 }
1473                 int err = system(commandline);
1474                 if (err != EXIT_SUCCESS) {
1475                         fprintf(stderr, "linker reported an error\n");
1476                         exit(1);
1477                 }
1478         }
1479
1480         obstack_free(&cppflags_obst, NULL);
1481         obstack_free(&ldflags_obst, NULL);
1482         obstack_free(&file_obst, NULL);
1483
1484         exit_mangle();
1485         exit_ast2firm();
1486         exit_parser();
1487         exit_ast();
1488         exit_lexer();
1489         exit_typehash();
1490         exit_types();
1491         exit_tokens();
1492         exit_symbol_table();
1493         return 0;
1494 }