nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 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 "driver/firm_timing.h"
  75 #include "adt/error.h"
  76 #include "wrappergen/write_fluffy.h"
  77 #include "wrappergen/write_caml.h"
  78 #include "wrappergen/write_jna.h"
  79 #include "revision.h"
  80 #include "warning.h"
  81 #include "mangle.h"
  82 #include "printer.h"
  83
  84 #ifndef PREPROCESSOR
  85 #ifndef __WIN32__
  86 #define PREPROCESSOR "gcc -E -m32 -U__STRICT_ANSI__"
  87 #else
  88 #define PREPROCESSOR "cpp -m32 -U__STRICT_ANSI__"
  89 #endif
  90 #endif
  91
  92 #ifndef LINKER
  93 #define LINKER    "gcc -m32"
  94 #endif
  95
  96 #ifndef ASSEMBLER
  97 #ifdef __APPLE__
  98 #define ASSEMBLER "gcc -m32 -c -xassembler"
  99 #else
 100 #define ASSEMBLER "as --32"
 101 #endif
 102 #endif
 103
 104 unsigned int       c_mode                    = _C89 | _ANSI | _C99 | _GNUC;
 105 unsigned int       machine_size              = 32;
 106 bool               byte_order_big_endian     = false;
 107 bool               char_is_signed            = true;
 108 bool               strict_mode               = false;
 109 bool               use_builtins              = false;
 110 bool               have_const_functions      = false;
 111 atomic_type_kind_t wchar_atomic_kind         = ATOMIC_TYPE_INT;
 112 unsigned           force_long_double_size    = 0;
 113 bool               enable_main_collect2_hack = false;
 114 bool               freestanding              = false;
 115
 116 /* to switch on printing of implicit casts */
 117 extern bool print_implicit_casts;
 118
 119 /* to switch on printing of parenthesis to indicate operator precedence */
 120 extern bool print_parenthesis;
 121
 122 static const char     *target_triple;
 123 static int             verbose;
 124 static struct obstack  cppflags_obst, ldflags_obst;
 125 static char            dep_target[1024];
 126 static const char     *outname;
 127
 128 typedef enum lang_standard_t {
 129         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 130         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 131         STANDARD_C89,     /* ISO C90 (sic) */
 132         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 133         STANDARD_C99,     /* ISO C99 */
 134         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 135         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 136         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 137         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 138 } lang_standard_t;
 139
 140 static lang_standard_t standard;
 141
 142 typedef struct file_list_entry_t file_list_entry_t;
 143
 144 typedef enum filetype_t {
 145         FILETYPE_AUTODETECT,
 146         FILETYPE_C,
 147         FILETYPE_PREPROCESSED_C,
 148         FILETYPE_CXX,
 149         FILETYPE_PREPROCESSED_CXX,
 150         FILETYPE_ASSEMBLER,
 151         FILETYPE_PREPROCESSED_ASSEMBLER,
 152         FILETYPE_OBJECT,
 153         FILETYPE_IR,
 154         FILETYPE_UNKNOWN
 155 } filetype_t;
 156
 157 struct file_list_entry_t {
 158         const char  *name; /**< filename or NULL for stdin */
 159         filetype_t   type;
 160         file_list_entry_t *next;
 161 };
 162
 163 static file_list_entry_t *temp_files;
 164
 165 static void initialize_firm(void)
 166 {
 167         firm_early_init();
 168 }
 169
 170 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 171                             const char *newext)
 172 {
 173         if (inputname == NULL)
 174                 inputname = "a";
 175
 176         char const *const last_slash = strrchr(inputname, '/');
 177         char const *const filename   =
 178                 last_slash != NULL ? last_slash + 1 : inputname;
 179         char const *const last_dot   = strrchr(filename, '.');
 180         char const *const name_end   =
 181                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 182
 183         int const len = snprintf(buf, buflen, "%.*s%s",
 184                         (int)(name_end - filename), filename, newext);
 185 #ifdef _WIN32
 186         if (len < 0 || buflen <= (size_t)len)
 187 #else
 188         if (buflen <= (size_t)len)
 189 #endif
 190                 panic("filename too long");
 191 }
 192
 193 #include "gen_builtins.h"
 194
 195 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 196 {
 197         start_parsing();
 198
 199         if (use_builtins) {
 200                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 201                 parse();
 202         }
 203
 204         lexer_open_stream(in, input_name);
 205         parse();
 206
 207         translation_unit_t *unit = finish_parsing();
 208         return unit;
 209 }
 210
 211 static void lextest(FILE *in, const char *fname)
 212 {
 213         lexer_open_stream(in, fname);
 214
 215         do {
 216                 lexer_next_preprocessing_token();
 217                 print_token(stdout, &lexer_token);
 218                 putchar('\n');
 219         } while (lexer_token.type != T_EOF);
 220 }
 221
 222 static void add_flag(struct obstack *obst, const char *format, ...)
 223 {
 224         char buf[65536];
 225         va_list ap;
 226
 227         va_start(ap, format);
 228 #ifdef _WIN32
 229         int len =
 230 #endif
 231                 vsnprintf(buf, sizeof(buf), format, ap);
 232         va_end(ap);
 233
 234         obstack_1grow(obst, ' ');
 235 #ifdef _WIN32
 236         obstack_1grow(obst, '"');
 237         obstack_grow(obst, buf, len);
 238         obstack_1grow(obst, '"');
 239 #else
 240         /* escape stuff... */
 241         for (char *c = buf; *c != '\0'; ++c) {
 242                 switch(*c) {
 243                 case ' ':
 244                 case '"':
 245                 case '$':
 246                 case '&':
 247                 case '(':
 248                 case ')':
 249                 case ';':
 250                 case '<':
 251                 case '>':
 252                 case '\'':
 253                 case '\\':
 254                 case '\n':
 255                 case '\r':
 256                 case '\t':
 257                 case '`':
 258                 case '|':
 259                         obstack_1grow(obst, '\\');
 260                         /* FALLTHROUGH */
 261                 default:
 262                         obstack_1grow(obst, *c);
 263                         break;
 264                 }
 265         }
 266 #endif
 267 }
 268
 269 static const char *type_to_string(type_t *type)
 270 {
 271         assert(type->kind == TYPE_ATOMIC);
 272         return get_atomic_kind_name(type->atomic.akind);
 273 }
 274
 275 static FILE *preprocess(const char *fname, filetype_t filetype)
 276 {
 277         static const char *common_flags = NULL;
 278
 279         if (common_flags == NULL) {
 280                 obstack_1grow(&cppflags_obst, '\0');
 281                 const char *flags = obstack_finish(&cppflags_obst);
 282
 283                 /* setup default defines */
 284                 add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 285                 add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 286                 add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 287                 add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 288
 289                 add_flag(&cppflags_obst, "-U__VERSION__");
 290                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 291
 292                 if (flags[0] != '\0') {
 293                         size_t len = strlen(flags);
 294                         obstack_1grow(&cppflags_obst, ' ');
 295                         obstack_grow(&cppflags_obst, flags, len);
 296                 }
 297                 obstack_1grow(&cppflags_obst, '\0');
 298                 common_flags = obstack_finish(&cppflags_obst);
 299         }
 300
 301         assert(obstack_object_size(&cppflags_obst) == 0);
 302
 303         const char *preprocessor = getenv("CPARSER_PP");
 304         if (preprocessor != NULL) {
 305                 obstack_printf(&cppflags_obst, "%s ", preprocessor);
 306         } else {
 307                 if (target_triple != NULL)
 308                         obstack_printf(&cppflags_obst, "%s-", target_triple);
 309                 obstack_printf(&cppflags_obst, PREPROCESSOR);
 310         }
 311
 312         switch (filetype) {
 313         case FILETYPE_C:
 314                 add_flag(&cppflags_obst, "-std=c99");
 315                 break;
 316         case FILETYPE_CXX:
 317                 add_flag(&cppflags_obst, "-std=c++98");
 318                 break;
 319         case FILETYPE_ASSEMBLER:
 320                 add_flag(&cppflags_obst, "-x");
 321                 add_flag(&cppflags_obst, "assembler-with-cpp");
 322                 break;
 323         default:
 324                 break;
 325         }
 326         obstack_printf(&cppflags_obst, "%s", common_flags);
 327
 328         /* handle dependency generation */
 329         if (dep_target[0] != '\0') {
 330                 add_flag(&cppflags_obst, "-MF");
 331                 add_flag(&cppflags_obst, dep_target);
 332                 if (outname != NULL) {
 333                                 add_flag(&cppflags_obst, "-MQ");
 334                                 add_flag(&cppflags_obst, outname);
 335                 }
 336         }
 337         add_flag(&cppflags_obst, fname);
 338
 339         obstack_1grow(&cppflags_obst, '\0');
 340         char *buf = obstack_finish(&cppflags_obst);
 341         if (verbose) {
 342                 puts(buf);
 343         }
 344
 345         FILE *f = popen(buf, "r");
 346         if (f == NULL) {
 347                 fprintf(stderr, "invoking preprocessor failed\n");
 348                 exit(EXIT_FAILURE);
 349         }
 350
 351         /* we don't really need that anymore */
 352         obstack_free(&cppflags_obst, buf);
 353
 354         return f;
 355 }
 356
 357 static void assemble(const char *out, const char *in)
 358 {
 359         struct obstack asflags_obst;
 360         char *buf;
 361
 362         obstack_init(&asflags_obst);
 363
 364         const char *assembler = getenv("CPARSER_AS");
 365         if (assembler != NULL) {
 366                 obstack_printf(&asflags_obst, "%s ", assembler);
 367         } else {
 368                 if (target_triple != NULL)
 369                         obstack_printf(&asflags_obst, "%s-", target_triple);
 370                 obstack_printf(&asflags_obst, "%s ", ASSEMBLER);
 371         }
 372
 373         obstack_printf(&asflags_obst, "%s -o %s", in, out);
 374         obstack_1grow(&asflags_obst, '\0');
 375         buf = obstack_finish(&asflags_obst);
 376
 377         if (verbose) {
 378                 puts(buf);
 379         }
 380
 381         int err = system(buf);
 382         if (err != 0) {
 383                 fprintf(stderr, "assembler reported an error\n");
 384                 exit(EXIT_FAILURE);
 385         }
 386
 387         obstack_free(&asflags_obst, NULL);
 388 }
 389
 390 static void print_file_name(const char *file)
 391 {
 392         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 393
 394         obstack_1grow(&ldflags_obst, '\0');
 395         const char *flags = obstack_finish(&ldflags_obst);
 396
 397         /* construct commandline */
 398         const char *linker = getenv("CPARSER_LINK");
 399         if (linker != NULL) {
 400                 obstack_printf(&ldflags_obst, "%s ", linker);
 401         } else {
 402                 if (target_triple != NULL)
 403                         obstack_printf(&ldflags_obst, "%s-", target_triple);
 404                 obstack_printf(&ldflags_obst, "%s ", LINKER);
 405         }
 406         obstack_printf(&ldflags_obst, "%s ", linker);
 407         obstack_printf(&ldflags_obst, "%s", flags);
 408         obstack_1grow(&ldflags_obst, '\0');
 409
 410         char *commandline = obstack_finish(&ldflags_obst);
 411
 412         if (verbose) {
 413                 puts(commandline);
 414         }
 415         int err = system(commandline);
 416         if (err != EXIT_SUCCESS) {
 417                 fprintf(stderr, "linker reported an error\n");
 418                 exit(EXIT_FAILURE);
 419         }
 420 }
 421
 422 static const char *try_dir(const char *dir)
 423 {
 424         if (dir == NULL)
 425                 return dir;
 426         if (access(dir, R_OK | W_OK | X_OK) == 0)
 427                 return dir;
 428         return NULL;
 429 }
 430
 431 static const char *get_tempdir(void)
 432 {
 433         static const char *tmpdir = NULL;
 434
 435         if (tmpdir != NULL)
 436                 return tmpdir;
 437
 438         if (tmpdir == NULL)
 439                 tmpdir = try_dir(getenv("TMPDIR"));
 440         if (tmpdir == NULL)
 441                 tmpdir = try_dir(getenv("TMP"));
 442         if (tmpdir == NULL)
 443                 tmpdir = try_dir(getenv("TEMP"));
 444
 445 #ifdef P_tmpdir
 446         if (tmpdir == NULL)
 447                 tmpdir = try_dir(P_tmpdir);
 448 #endif
 449
 450         if (tmpdir == NULL)
 451                 tmpdir = try_dir("/var/tmp");
 452         if (tmpdir == NULL)
 453                 tmpdir = try_dir("/usr/tmp");
 454         if (tmpdir == NULL)
 455                 tmpdir = try_dir("/tmp");
 456
 457         if (tmpdir == NULL)
 458                 tmpdir = ".";
 459
 460         return tmpdir;
 461 }
 462
 463 #ifndef HAVE_MKSTEMP
 464 /* cheap and nasty mkstemp replacement */
 465 static int mkstemp(char *templ)
 466 {
 467         mktemp(templ);
 468         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 469 }
 470 #endif
 471
 472 /**
 473  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 474  * during linking (like glibc/gnu ld do for tmpnam)...
 475  */
 476 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 477 {
 478         const char *tempdir = get_tempdir();
 479
 480         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 481
 482         int fd = mkstemp(buffer);
 483         if (fd == -1) {
 484                 fprintf(stderr, "couldn't create temporary file: %s\n",
 485                         strerror(errno));
 486                 exit(EXIT_FAILURE);
 487         }
 488         FILE *out = fdopen(fd, "w");
 489         if (out == NULL) {
 490                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 491                 exit(EXIT_FAILURE);
 492         }
 493
 494         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 495         memset(entry, 0, sizeof(*entry));
 496
 497         size_t  name_len = strlen(buffer) + 1;
 498         char   *name     = malloc(name_len);
 499         memcpy(name, buffer, name_len);
 500         entry->name      = name;
 501
 502         entry->next = temp_files;
 503         temp_files  = entry;
 504
 505         return out;
 506 }
 507
 508 static void free_temp_files(void)
 509 {
 510         file_list_entry_t *entry = temp_files;
 511         file_list_entry_t *next;
 512         for ( ; entry != NULL; entry = next) {
 513                 next = entry->next;
 514
 515                 unlink(entry->name);
 516                 free((char*) entry->name);
 517                 free(entry);
 518         }
 519         temp_files = NULL;
 520 }
 521
 522 typedef enum compile_mode_t {
 523         BenchmarkParser,
 524         PreprocessOnly,
 525         ParseOnly,
 526         Compile,
 527         CompileDump,
 528         CompileExportIR,
 529         CompileAssemble,
 530         CompileAssembleLink,
 531         LexTest,
 532         PrintAst,
 533         PrintFluffy,
 534         PrintCaml,
 535         PrintJna
 536 } compile_mode_t;
 537
 538 static void usage(const char *argv0)
 539 {
 540         fprintf(stderr, "Usage %s [options] input [-o output]\n", argv0);
 541 }
 542
 543 static void print_cparser_version(void)
 544 {
 545         printf("cparser (%s) using libFirm (%u.%u",
 546                cparser_REVISION, ir_get_version_major(),
 547                ir_get_version_minor());
 548
 549         const char *revision = ir_get_version_revision();
 550         if (revision[0] != 0) {
 551                 putchar(' ');
 552                 fputs(revision, stdout);
 553         }
 554
 555         const char *build = ir_get_version_build();
 556         if (build[0] != 0) {
 557                 putchar(' ');
 558                 fputs(build, stdout);
 559         }
 560         puts(")");
 561         puts("This is free software; see the source for copying conditions.  There is NO\n"
 562              "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
 563 }
 564
 565 static void print_help(const char *argv0)
 566 {
 567         usage(argv0);
 568         puts("");
 569         puts("\t-fhelp     Display help about firm optimisation options");
 570         puts("\t-bhelp     Display help about firm backend options");
 571         puts("A big number of gcc flags is also supported");
 572 }
 573
 574 static void set_be_option(const char *arg)
 575 {
 576         int res = be_parse_arg(arg);
 577         (void) res;
 578         assert(res);
 579 }
 580
 581 static void set_option(const char *arg)
 582 {
 583         int res = firm_option(arg);
 584         (void) res;
 585         assert(res);
 586 }
 587
 588 static void copy_file(FILE *dest, FILE *input)
 589 {
 590         char buf[16384];
 591
 592         while (!feof(input) && !ferror(dest)) {
 593                 size_t read = fread(buf, 1, sizeof(buf), input);
 594                 if (fwrite(buf, 1, read, dest) != read) {
 595                         perror("couldn't write output");
 596                 }
 597         }
 598 }
 599
 600 static inline bool streq(char const* a, char const* b)
 601 {
 602         return strcmp(a, b) == 0;
 603 }
 604
 605 static inline bool strstart(char const* str, char const* start)
 606 {
 607         do {
 608                 if (*start == '\0')
 609                         return true;
 610         } while (*str++ == *start++);
 611         return false;
 612 }
 613
 614 static FILE *open_file(const char *filename)
 615 {
 616         if (streq(filename, "-")) {
 617                 return stdin;
 618         }
 619
 620         FILE *in = fopen(filename, "r");
 621         if (in == NULL) {
 622                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 623                                 strerror(errno));
 624                 exit(EXIT_FAILURE);
 625         }
 626
 627         return in;
 628 }
 629
 630 static filetype_t get_filetype_from_string(const char *string)
 631 {
 632         if (streq(string, "c") || streq(string, "c-header"))
 633                 return FILETYPE_C;
 634         if (streq(string, "c++") || streq(string, "c++-header"))
 635                 return FILETYPE_CXX;
 636         if (streq(string, "assembler"))
 637                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 638         if (streq(string, "assembler-with-cpp"))
 639                 return FILETYPE_ASSEMBLER;
 640         if (streq(string, "none"))
 641                 return FILETYPE_AUTODETECT;
 642
 643         return FILETYPE_UNKNOWN;
 644 }
 645
 646 /**
 647  * Initialize firm codegeneration for a specific operating system.
 648  * The argument is the operating system part of a target-triple */
 649 static bool set_os_support(const char *os)
 650 {
 651         wchar_atomic_kind         = ATOMIC_TYPE_INT;
 652         force_long_double_size    = 0;
 653         enable_main_collect2_hack = false;
 654
 655         if (strstr(os, "linux") != NULL || strstr(os, "bsd") != NULL
 656                         || streq(os, "solaris")) {
 657                 set_be_option("ia32-gasmode=elf");
 658                 set_create_ld_ident(create_name_linux_elf);
 659         } else if (streq(os, "darwin")) {
 660                 force_long_double_size = 16;
 661                 set_be_option("ia32-gasmode=macho");
 662                 set_be_option("ia32-stackalign=4");
 663                 set_be_option("pic=true");
 664                 set_create_ld_ident(create_name_macho);
 665         } else if (strstr(os, "mingw") != NULL || streq(os, "win32")) {
 666                 wchar_atomic_kind         = ATOMIC_TYPE_USHORT;
 667                 enable_main_collect2_hack = true;
 668                 set_be_option("ia32-gasmode=mingw");
 669                 set_create_ld_ident(create_name_win32);
 670         } else {
 671                 return false;
 672         }
 673
 674         return true;
 675 }
 676
 677 static bool parse_target_triple(const char *arg)
 678 {
 679         const char *manufacturer = strchr(arg, '-');
 680         if (manufacturer == NULL) {
 681                 fprintf(stderr, "Target-triple is not in the form 'cpu_type-manufacturer-operating_system'\n");
 682                 return false;
 683         }
 684         manufacturer += 1;
 685
 686         const char *os = strchr(manufacturer, '-');
 687         if (os == NULL) {
 688                 fprintf(stderr, "Target-triple is not in the form 'cpu_type-manufacturer-operating_system'\n");
 689                 return false;
 690         }
 691         os += 1;
 692
 693         /* Note: Triples are more or less defined by what the config.guess and
 694          * config.sub scripts from GNU autoconf emit. We have to lookup there what
 695          * triples are possible */
 696
 697         /* process cpu type */
 698         if (strstart(arg, "i386-")) {
 699                 be_parse_arg("isa=ia32");
 700                 be_parse_arg("ia32-arch=i386");
 701         } else if (strstart(arg, "i486-")) {
 702                 be_parse_arg("isa=ia32");
 703                 be_parse_arg("ia32-arch=i486");
 704         } else if (strstart(arg, "i586-")) {
 705                 be_parse_arg("isa=ia32");
 706                 be_parse_arg("ia32-arch=i586");
 707         } else if (strstart(arg, "i686-")) {
 708                 be_parse_arg("isa=ia32");
 709                 be_parse_arg("ia32-arch=i686");
 710         } else if (strstart(arg, "i786-")) {
 711                 be_parse_arg("isa=ia32");
 712                 be_parse_arg("ia32-arch=pentium4");
 713         } else if (strstart(arg, "x86_64")) {
 714                 be_parse_arg("isa=amd64");
 715         } else if (strstart(arg, "sparc-")) {
 716                 be_parse_arg("isa=sparc");
 717         } else if (strstart(arg, "arm-")) {
 718                 be_parse_arg("isa=arm");
 719         } else {
 720                 fprintf(stderr, "Unknown cpu in triple '%s'\n", arg);
 721                 return false;
 722         }
 723
 724         /* process manufacturer, alot of people incorrectly leave out the
 725          * manufacturer instead of using unknown- */
 726         if (strstart(manufacturer, "linux")) {
 727                 os = manufacturer;
 728                 manufacturer = "unknown-";
 729         }
 730
 731         /* process operating system */
 732         if (!set_os_support(os)) {
 733                 fprintf(stderr, "Unknown operating system '%s' in triple '%s'\n", os, arg);
 734                 return false;
 735         }
 736
 737         target_triple = arg;
 738         return true;
 739 }
 740
 741 int main(int argc, char **argv)
 742 {
 743         initialize_firm();
 744
 745         const char        *dumpfunction         = NULL;
 746         const char        *print_file_name_file = NULL;
 747         compile_mode_t     mode                 = CompileAssembleLink;
 748         int                opt_level            = 1;
 749         int                result               = EXIT_SUCCESS;
 750         char               cpu_arch[16]         = "ia32";
 751         file_list_entry_t *files                = NULL;
 752         file_list_entry_t *last_file            = NULL;
 753         bool               construct_dep_target = false;
 754         bool               do_timing            = false;
 755         struct obstack     file_obst;
 756
 757         atexit(free_temp_files);
 758
 759         /* hack for now... */
 760         if (strstr(argv[0], "pptest") != NULL) {
 761                 extern int pptest_main(int argc, char **argv);
 762                 return pptest_main(argc, argv);
 763         }
 764
 765         obstack_init(&cppflags_obst);
 766         obstack_init(&ldflags_obst);
 767         obstack_init(&file_obst);
 768
 769 #define GET_ARG_AFTER(def, args)                                             \
 770         def = &arg[sizeof(args)-1];                                              \
 771         if (def[0] == '\0') {                                                     \
 772                 ++i;                                                                 \
 773                 if (i >= argc) {                                                      \
 774                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 775                         argument_errors = true;                                          \
 776                         break;                                                           \
 777                 }                                                                    \
 778                 def = argv[i];                                                       \
 779                 if (def[0] == '-' && def[1] != '\0') {                                \
 780                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 781                         argument_errors = true;                                          \
 782                         continue;                                                        \
 783                 }                                                                    \
 784         }
 785
 786 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 787
 788         /* early options parsing (find out optimisation level and OS) */
 789         for (int i = 1; i < argc; ++i) {
 790                 const char *arg = argv[i];
 791                 if (arg[0] != '-')
 792                         continue;
 793
 794                 const char *option = &arg[1];
 795                 if (option[0] == 'O') {
 796                         sscanf(&option[1], "%d", &opt_level);
 797                 }
 798         }
 799
 800         /* Guess host OS */
 801 #if defined(_WIN32) || defined(__CYGWIN__)
 802         set_os_support("win32");
 803 #elif defined(__APPLE__)
 804         set_os_support("darwin");
 805 #else
 806         set_os_support("linux");
 807 #endif
 808
 809         /* apply optimisation level */
 810         switch(opt_level) {
 811         case 0:
 812                 set_option("no-opt");
 813                 break;
 814         case 1:
 815                 set_option("no-inline");
 816                 break;
 817         default:
 818         case 4:
 819                 /* use_builtins = true; */
 820                 /* fallthrough */
 821         case 3:
 822                 set_option("thread-jumps");
 823                 set_option("if-conversion");
 824                 /* fallthrough */
 825         case 2:
 826                 set_option("strict-aliasing");
 827                 set_option("inline");
 828                 set_option("deconv");
 829                 set_be_option("omitfp");
 830                 break;
 831         }
 832
 833         const char *target = getenv("TARGET");
 834         if (target != NULL)
 835                 parse_target_triple(target);
 836
 837         /* parse rest of options */
 838         standard                   = STANDARD_DEFAULT;
 839         unsigned   features_on     = 0;
 840         unsigned   features_off    = 0;
 841         filetype_t forced_filetype = FILETYPE_AUTODETECT;
 842         bool       help_displayed  = false;
 843         bool       argument_errors = false;
 844         for (int i = 1; i < argc; ++i) {
 845                 const char *arg = argv[i];
 846                 if (arg[0] == '-' && arg[1] != '\0') {
 847                         /* an option */
 848                         const char *option = &arg[1];
 849                         if (option[0] == 'o') {
 850                                 GET_ARG_AFTER(outname, "-o");
 851                         } else if (option[0] == 'g') {
 852                                 set_be_option("debuginfo=stabs");
 853                                 set_be_option("omitfp=no");
 854                                 set_be_option("ia32-nooptcc=yes");
 855                         } else if (SINGLE_OPTION('c')) {
 856                                 mode = CompileAssemble;
 857                         } else if (SINGLE_OPTION('E')) {
 858                                 mode = PreprocessOnly;
 859                         } else if (SINGLE_OPTION('S')) {
 860                                 mode = Compile;
 861                         } else if (option[0] == 'O') {
 862                                 continue;
 863                         } else if (option[0] == 'I') {
 864                                 const char *opt;
 865                                 GET_ARG_AFTER(opt, "-I");
 866                                 add_flag(&cppflags_obst, "-I%s", opt);
 867                         } else if (option[0] == 'D') {
 868                                 const char *opt;
 869                                 GET_ARG_AFTER(opt, "-D");
 870                                 add_flag(&cppflags_obst, "-D%s", opt);
 871                         } else if (option[0] == 'U') {
 872                                 const char *opt;
 873                                 GET_ARG_AFTER(opt, "-U");
 874                                 add_flag(&cppflags_obst, "-U%s", opt);
 875                         } else if (option[0] == 'l') {
 876                                 const char *opt;
 877                                 GET_ARG_AFTER(opt, "-l");
 878                                 add_flag(&ldflags_obst, "-l%s", opt);
 879                         } else if (option[0] == 'L') {
 880                                 const char *opt;
 881                                 GET_ARG_AFTER(opt, "-L");
 882                                 add_flag(&ldflags_obst, "-L%s", opt);
 883                         } else if (SINGLE_OPTION('v')) {
 884                                 verbose = 1;
 885                         } else if (SINGLE_OPTION('w')) {
 886                                 memset(&warning, 0, sizeof(warning));
 887                         } else if (option[0] == 'x') {
 888                                 const char *opt;
 889                                 GET_ARG_AFTER(opt, "-x");
 890                                 forced_filetype = get_filetype_from_string(opt);
 891                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 892                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 893                                         argument_errors = true;
 894                                 }
 895                         } else if (streq(option, "M")) {
 896                                 mode = PreprocessOnly;
 897                                 add_flag(&cppflags_obst, "-M");
 898                         } else if (streq(option, "MMD") ||
 899                                    streq(option, "MD")) {
 900                             construct_dep_target = true;
 901                                 add_flag(&cppflags_obst, "-%s", option);
 902                         } else if (streq(option, "MM")  ||
 903                                    streq(option, "MP")) {
 904                                 add_flag(&cppflags_obst, "-%s", option);
 905                         } else if (streq(option, "MT") ||
 906                                    streq(option, "MQ") ||
 907                                    streq(option, "MF")) {
 908                                 const char *opt;
 909                                 GET_ARG_AFTER(opt, "-MT");
 910                                 add_flag(&cppflags_obst, "-%s", option);
 911                                 add_flag(&cppflags_obst, "%s", opt);
 912                         } else if (streq(option, "include")) {
 913                                 const char *opt;
 914                                 GET_ARG_AFTER(opt, "-include");
 915                                 add_flag(&cppflags_obst, "-include");
 916                                 add_flag(&cppflags_obst, "%s", opt);
 917                         } else if (streq(option, "isystem")) {
 918                                 const char *opt;
 919                                 GET_ARG_AFTER(opt, "-isystem");
 920                                 add_flag(&cppflags_obst, "-isystem");
 921                                 add_flag(&cppflags_obst, "%s", opt);
 922 #if defined(linux) || defined(__linux) || defined(__linux__) || defined(__CYGWIN__)
 923                         } else if (streq(option, "pthread")) {
 924                                 /* set flags for the preprocessor */
 925                                 add_flag(&cppflags_obst, "-D_REENTRANT");
 926                                 /* set flags for the linker */
 927                                 add_flag(&ldflags_obst, "-lpthread");
 928 #endif
 929                         } else if (streq(option, "nostdinc")
 930                                         || streq(option, "trigraphs")) {
 931                                 /* pass these through to the preprocessor */
 932                                 add_flag(&cppflags_obst, "%s", arg);
 933                         } else if (streq(option, "pipe")) {
 934                                 /* here for gcc compatibility */
 935                         } else if (option[0] == 'f') {
 936                                 char const *orig_opt;
 937                                 GET_ARG_AFTER(orig_opt, "-f");
 938
 939                                 if (strstart(orig_opt, "input-charset=")) {
 940                                         char const* const encoding = strchr(orig_opt, '=') + 1;
 941                                         select_input_encoding(encoding);
 942                                 } else if (streq(orig_opt, "verbose-asm")) {
 943                                         /* ignore: we always print verbose assembler */
 944                                 } else {
 945                                         char const *opt         = orig_opt;
 946                                         bool        truth_value = true;
 947                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 948                                                 truth_value = false;
 949                                                 opt += 3;
 950                                         }
 951
 952                                         if (streq(opt, "builtins")) {
 953                                                 use_builtins = truth_value;
 954                                         } else if (streq(opt, "dollars-in-identifiers")) {
 955                                                 allow_dollar_in_symbol = truth_value;
 956                                         } else if (streq(opt, "omit-frame-pointer")) {
 957                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 958                                         } else if (streq(opt, "short-wchar")) {
 959                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 960                                                         : ATOMIC_TYPE_INT;
 961                                         } else if (streq(opt, "signed-char")) {
 962                                                 char_is_signed = truth_value;
 963                                         } else if (streq(opt, "strength-reduce")) {
 964                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 965                                         } else if (streq(opt, "syntax-only")) {
 966                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 967                                         } else if (streq(opt, "unsigned-char")) {
 968                                                 char_is_signed = !truth_value;
 969                                         } else if (streq(opt, "freestanding")) {
 970                                                 freestanding = true;
 971                                         } else if (streq(opt, "hosted")) {
 972                                                 freestanding = false;
 973                                         } else if (truth_value == false &&
 974                                                    streq(opt, "asynchronous-unwind-tables")) {
 975                                             /* nothing todo, a gcc feature which we don't support
 976                                              * anyway was deactivated */
 977                                         } else if (strstart(orig_opt, "align-loops=") ||
 978                                                         strstart(orig_opt, "align-jumps=") ||
 979                                                         strstart(orig_opt, "align-functions=")) {
 980                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 981                                         } else if (strstart(orig_opt, "message-length=")) {
 982                                                         /* ignore: would only affect error message format */
 983                                         } else if (streq(opt, "fast-math")               ||
 984                                                    streq(opt, "jump-tables")             ||
 985                                                    streq(opt, "expensive-optimizations") ||
 986                                                    streq(opt, "common")                  ||
 987                                                    streq(opt, "optimize-sibling-calls")  ||
 988                                                    streq(opt, "align-loops")             ||
 989                                                    streq(opt, "align-jumps")             ||
 990                                                    streq(opt, "align-functions")         ||
 991                                                    streq(opt, "PIC")) {
 992                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 993                                         } else {
 994                                                 int res = firm_option(orig_opt);
 995                                                 if (res == 0) {
 996                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 997                                                                 orig_opt);
 998                                                         argument_errors = true;
 999                                                         continue;
1000                                                 } else if (res == -1) {
1001                                                         help_displayed = true;
1002                                                 }
1003                                         }
1004                                 }
1005                         } else if (option[0] == 'b') {
1006                                 const char *opt;
1007                                 GET_ARG_AFTER(opt, "-b");
1008                                 int res = be_parse_arg(opt);
1009                                 if (res == 0) {
1010                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
1011                                                 opt);
1012                                         argument_errors = true;
1013                                 } else if (res == -1) {
1014                                         help_displayed = true;
1015                                 } else if (strstart(opt, "isa=")) {
1016                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
1017                                 }
1018                         } else if (option[0] == 'W') {
1019                                 if (option[1] == '\0') {
1020                                         /* ignore -W, our defaults are already quite verbose */
1021                                 } else if (strstart(option + 1, "p,")) {
1022                                         // pass options directly to the preprocessor
1023                                         const char *opt;
1024                                         GET_ARG_AFTER(opt, "-Wp,");
1025                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
1026                                 } else if (strstart(option + 1, "l,")) {
1027                                         // pass options directly to the linker
1028                                         const char *opt;
1029                                         GET_ARG_AFTER(opt, "-Wl,");
1030                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
1031                                 } else if (streq(option + 1, "no-trigraphs")
1032                                                         || streq(option + 1, "undef")) {
1033                                         add_flag(&cppflags_obst, "%s", arg);
1034                                 } else {
1035                                         set_warning_opt(&option[1]);
1036                                 }
1037                         } else if (option[0] == 'm') {
1038                                 /* -m options */
1039                                 const char *opt;
1040                                 char arch_opt[64];
1041
1042                                 GET_ARG_AFTER(opt, "-m");
1043                                 if (strstart(opt, "target=")) {
1044                                         GET_ARG_AFTER(opt, "-mtarget=");
1045                                         if (!parse_target_triple(opt))
1046                                                 argument_errors = true;
1047                                 } else if (strstart(opt, "triple=")) {
1048                                         GET_ARG_AFTER(opt, "-mtriple=");
1049                                         if (!parse_target_triple(opt))
1050                                                 argument_errors = true;
1051                                 } else if (strstart(opt, "arch=")) {
1052                                         GET_ARG_AFTER(opt, "-march=");
1053                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1054                                         int res = be_parse_arg(arch_opt);
1055                                         if (res == 0) {
1056                                                 fprintf(stderr, "Unknown architecture '%s'\n", arch_opt);
1057                                                 argument_errors = true;
1058                                         } else {
1059                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1060                                                 int res = be_parse_arg(arch_opt);
1061                                                 if (res == 0)
1062                                                         argument_errors = true;
1063                                         }
1064                                 } else if (strstart(opt, "tune=")) {
1065                                         GET_ARG_AFTER(opt, "-mtune=");
1066                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1067                                         int res = be_parse_arg(arch_opt);
1068                                         if (res == 0)
1069                                                 argument_errors = true;
1070                                 } else if (strstart(opt, "cpu=")) {
1071                                         GET_ARG_AFTER(opt, "-mcpu=");
1072                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1073                                         int res = be_parse_arg(arch_opt);
1074                                         if (res == 0)
1075                                                 argument_errors = true;
1076                                 } else if (strstart(opt, "fpmath=")) {
1077                                         GET_ARG_AFTER(opt, "-mfpmath=");
1078                                         if (streq(opt, "387"))
1079                                                 opt = "x87";
1080                                         else if (streq(opt, "sse"))
1081                                                 opt = "sse2";
1082                                         else {
1083                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
1084                                                 argument_errors = true;
1085                                         }
1086                                         if (!argument_errors) {
1087                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
1088                                                 int res = be_parse_arg(arch_opt);
1089                                                 if (res == 0)
1090                                                         argument_errors = true;
1091                                         }
1092                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
1093                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
1094                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
1095                                         int res = be_parse_arg(arch_opt);
1096                                         if (res == 0)
1097                                                 argument_errors = true;
1098                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
1099                                         set_be_option("omitleaffp=1");
1100                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
1101                                         set_be_option("omitleaffp=0");
1102                                 } else if (streq(opt, "rtd")) {
1103                                         default_calling_convention = CC_STDCALL;
1104                                 } else if (strstart(opt, "regparm=")) {
1105                                         fprintf(stderr, "error: regparm convention not supported yet\n");
1106                                         argument_errors = true;
1107                                 } else if (streq(opt, "soft-float")) {
1108                                         fprintf(stderr, "error: software floatingpoint not supported yet\n");
1109                                         argument_errors = true;
1110                                 } else {
1111                                         long int value = strtol(opt, NULL, 10);
1112                                         if (value == 0) {
1113                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
1114                                                 argument_errors = true;
1115                                         } else if (value != 16 && value != 32 && value != 64) {
1116                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
1117                                                 argument_errors = true;
1118                                         } else {
1119                                                 machine_size = (unsigned int)value;
1120                                         }
1121                                 }
1122                         } else if (streq(option, "pg")) {
1123                                 set_be_option("gprof");
1124                                 add_flag(&ldflags_obst, "-pg");
1125                         } else if (streq(option, "pedantic") ||
1126                                    streq(option, "ansi")) {
1127                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1128                         } else if (streq(option, "shared")) {
1129                                 add_flag(&ldflags_obst, "-shared");
1130                         } else if (strstart(option, "std=")) {
1131                                 const char *const o = &option[4];
1132                                 standard =
1133                                         streq(o, "c++")            ? STANDARD_CXX98   :
1134                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1135                                         streq(o, "c89")            ? STANDARD_C89     :
1136                                         streq(o, "c99")            ? STANDARD_C99     :
1137                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1138                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1139                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1140                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1141                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1142                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1143                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1144                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1145                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1146                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1147                         } else if (streq(option, "version")) {
1148                                 print_cparser_version();
1149                         } else if (strstart(option, "print-file-name=")) {
1150                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1151                         } else if (option[0] == '-') {
1152                                 /* double dash option */
1153                                 ++option;
1154                                 if (streq(option, "gcc")) {
1155                                         features_on  |=  _GNUC;
1156                                         features_off &= ~_GNUC;
1157                                 } else if (streq(option, "no-gcc")) {
1158                                         features_on  &= ~_GNUC;
1159                                         features_off |=  _GNUC;
1160                                 } else if (streq(option, "ms")) {
1161                                         features_on  |=  _MS;
1162                                         features_off &= ~_MS;
1163                                 } else if (streq(option, "no-ms")) {
1164                                         features_on  &= ~_MS;
1165                                         features_off |=  _MS;
1166                                 } else if (streq(option, "strict")) {
1167                                         strict_mode = true;
1168                                 } else if (streq(option, "lextest")) {
1169                                         mode = LexTest;
1170                                 } else if (streq(option, "benchmark")) {
1171                                         mode = BenchmarkParser;
1172                                 } else if (streq(option, "print-ast")) {
1173                                         mode = PrintAst;
1174                                 } else if (streq(option, "print-implicit-cast")) {
1175                                         print_implicit_casts = true;
1176                                 } else if (streq(option, "print-parenthesis")) {
1177                                         print_parenthesis = true;
1178                                 } else if (streq(option, "print-fluffy")) {
1179                                         mode = PrintFluffy;
1180                                 } else if (streq(option, "print-caml")) {
1181                                         mode = PrintCaml;
1182                                 } else if (streq(option, "print-jna")) {
1183                                         mode = PrintJna;
1184                                 } else if (streq(option, "jna-limit")) {
1185                                         ++i;
1186                                         if (i >= argc) {
1187                                                 fprintf(stderr, "error: "
1188                                                         "expected argument after '--jna-limit'\n");
1189                                                 argument_errors = true;
1190                                                 break;
1191                                         }
1192                                         jna_limit_output(argv[i]);
1193                                 } else if (streq(option, "jna-libname")) {
1194                                         ++i;
1195                                         if (i >= argc) {
1196                                                 fprintf(stderr, "error: "
1197                                                         "expected argument after '--jna-libname'\n");
1198                                                 argument_errors = true;
1199                                                 break;
1200                                         }
1201                                         jna_set_libname(argv[i]);
1202                                 } else if (streq(option, "time")) {
1203                                         do_timing = true;
1204                                 } else if (streq(option, "version")) {
1205                                         print_cparser_version();
1206                                         return EXIT_SUCCESS;
1207                                 } else if (streq(option, "help")) {
1208                                         print_help(argv[0]);
1209                                         help_displayed = true;
1210                                 } else if (streq(option, "dump-function")) {
1211                                         ++i;
1212                                         if (i >= argc) {
1213                                                 fprintf(stderr, "error: "
1214                                                         "expected argument after '--dump-function'\n");
1215                                                 argument_errors = true;
1216                                                 break;
1217                                         }
1218                                         dumpfunction = argv[i];
1219                                         mode         = CompileDump;
1220                                 } else if (streq(option, "export-ir")) {
1221                                         mode = CompileExportIR;
1222                                 } else {
1223                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1224                                         argument_errors = true;
1225                                 }
1226                         } else {
1227                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1228                                 argument_errors = true;
1229                         }
1230                 } else {
1231                         filetype_t type = forced_filetype;
1232                         if (type == FILETYPE_AUTODETECT) {
1233                                 if (streq(arg, "-")) {
1234                                         /* - implicitly means C source file */
1235                                         type = FILETYPE_C;
1236                                 } else {
1237                                         const char *suffix = strrchr(arg, '.');
1238                                         /* Ensure there is at least one char before the suffix */
1239                                         if (suffix != NULL && suffix != arg) {
1240                                                 ++suffix;
1241                                                 type =
1242                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1243                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1244                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1245                                                         streq(suffix, "C")   ? FILETYPE_CXX                    :
1246                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1247                                                         streq(suffix, "cp")  ? FILETYPE_CXX                    :
1248                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1249                                                         streq(suffix, "CPP") ? FILETYPE_CXX                    :
1250                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1251                                                         streq(suffix, "c++") ? FILETYPE_CXX                    :
1252                                                         streq(suffix, "ii")  ? FILETYPE_CXX                    :
1253                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1254                                                         streq(suffix, "ir")  ? FILETYPE_IR                     :
1255                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1256                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1257                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1258                                                         FILETYPE_OBJECT; /* gcc behavior: unknown file extension means object file */
1259                                         }
1260                                 }
1261                         }
1262
1263                         file_list_entry_t *entry
1264                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1265                         memset(entry, 0, sizeof(entry[0]));
1266                         entry->name = arg;
1267                         entry->type = type;
1268
1269                         if (last_file != NULL) {
1270                                 last_file->next = entry;
1271                         } else {
1272                                 files = entry;
1273                         }
1274                         last_file = entry;
1275                 }
1276         }
1277
1278         if (help_displayed) {
1279                 return !argument_errors;
1280         }
1281
1282         if (print_file_name_file != NULL) {
1283                 print_file_name(print_file_name_file);
1284                 return EXIT_SUCCESS;
1285         }
1286         if (files == NULL) {
1287                 fprintf(stderr, "error: no input files specified\n");
1288                 argument_errors = true;
1289         }
1290
1291         if (argument_errors) {
1292                 usage(argv[0]);
1293                 return EXIT_FAILURE;
1294         }
1295
1296         /* we do the lowering in ast2firm */
1297         firm_opt.lower_bitfields = FALSE;
1298
1299         /* set the c_mode here, types depends on it */
1300         c_mode |= features_on;
1301         c_mode &= ~features_off;
1302
1303         gen_firm_init();
1304         byte_order_big_endian = be_get_backend_param()->byte_order_big_endian;
1305         init_symbol_table();
1306         init_types();
1307         init_typehash();
1308         init_basic_types();
1309         init_lexer();
1310         init_ast();
1311         init_parser();
1312         init_ast2firm();
1313         init_mangle();
1314
1315         if (do_timing)
1316                 timer_init();
1317
1318         if (construct_dep_target) {
1319                 if (outname != 0 && strlen(outname) >= 2) {
1320                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1321                 } else {
1322                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1323                 }
1324         } else {
1325                 dep_target[0] = '\0';
1326         }
1327
1328         char outnamebuf[4096];
1329         if (outname == NULL) {
1330                 const char *filename = files->name;
1331
1332                 switch(mode) {
1333                 case BenchmarkParser:
1334                 case PrintAst:
1335                 case PrintFluffy:
1336                 case PrintCaml:
1337                 case PrintJna:
1338                 case LexTest:
1339                 case PreprocessOnly:
1340                 case ParseOnly:
1341                         outname = "-";
1342                         break;
1343                 case Compile:
1344                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1345                         outname = outnamebuf;
1346                         break;
1347                 case CompileAssemble:
1348                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1349                         outname = outnamebuf;
1350                         break;
1351                 case CompileDump:
1352                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1353                                         ".vcg");
1354                         outname = outnamebuf;
1355                         break;
1356                 case CompileExportIR:
1357                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
1358                         outname = outnamebuf;
1359                         break;
1360                 case CompileAssembleLink:
1361 #ifdef _WIN32
1362                         outname = "a.exe";
1363 #else
1364                         outname = "a.out";
1365 #endif
1366                         break;
1367                 }
1368         }
1369
1370         assert(outname != NULL);
1371
1372         FILE *out;
1373         if (streq(outname, "-")) {
1374                 out = stdout;
1375         } else {
1376                 out = fopen(outname, "w");
1377                 if (out == NULL) {
1378                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1379                                         strerror(errno));
1380                         return EXIT_FAILURE;
1381                 }
1382         }
1383
1384         file_list_entry_t *file;
1385         bool               already_constructed_firm = false;
1386         for (file = files; file != NULL; file = file->next) {
1387                 char        asm_tempfile[1024];
1388                 const char *filename = file->name;
1389                 filetype_t  filetype = file->type;
1390
1391                 if (filetype == FILETYPE_OBJECT)
1392                         continue;
1393
1394                 FILE *in = NULL;
1395                 if (mode == LexTest) {
1396                         if (in == NULL)
1397                                 in = open_file(filename);
1398                         lextest(in, filename);
1399                         fclose(in);
1400                         return EXIT_SUCCESS;
1401                 }
1402
1403                 FILE *preprocessed_in = NULL;
1404                 filetype_t next_filetype = filetype;
1405                 switch (filetype) {
1406                         case FILETYPE_C:
1407                                 next_filetype = FILETYPE_PREPROCESSED_C;
1408                                 goto preprocess;
1409                         case FILETYPE_CXX:
1410                                 next_filetype = FILETYPE_PREPROCESSED_CXX;
1411                                 goto preprocess;
1412                         case FILETYPE_ASSEMBLER:
1413                                 next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1414                                 goto preprocess;
1415 preprocess:
1416                                 /* no support for input on FILE* yet */
1417                                 if (in != NULL)
1418                                         panic("internal compiler error: in for preprocessor != NULL");
1419
1420                                 preprocessed_in = preprocess(filename, filetype);
1421                                 if (mode == PreprocessOnly) {
1422                                         copy_file(out, preprocessed_in);
1423                                         int result = pclose(preprocessed_in);
1424                                         fclose(out);
1425                                         /* remove output file in case of error */
1426                                         if (out != stdout && result != EXIT_SUCCESS) {
1427                                                 unlink(outname);
1428                                         }
1429                                         return result;
1430                                 }
1431
1432                                 in = preprocessed_in;
1433                                 filetype = next_filetype;
1434                                 break;
1435
1436                         default:
1437                                 break;
1438                 }
1439
1440                 FILE *asm_out;
1441                 if (mode == Compile) {
1442                         asm_out = out;
1443                 } else {
1444                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1445                 }
1446
1447                 if (in == NULL)
1448                         in = open_file(filename);
1449
1450                 /* preprocess and compile */
1451                 if (filetype == FILETYPE_PREPROCESSED_C) {
1452                         char const* invalid_mode;
1453                         switch (standard) {
1454                                 case STANDARD_ANSI:
1455                                 case STANDARD_C89:   c_mode = _C89;                break;
1456                                 /* TODO determine difference between these two */
1457                                 case STANDARD_C90:   c_mode = _C89;                break;
1458                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1459                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1460
1461 default_c_warn:
1462                                         fprintf(stderr,
1463                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1464                                                         invalid_mode);
1465                                         /* FALLTHROUGH */
1466                                 case STANDARD_DEFAULT:
1467                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1468
1469                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1470                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1471                         }
1472                         goto do_parsing;
1473                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1474                         char const* invalid_mode;
1475                         switch (standard) {
1476                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1477                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1478                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1479                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1480                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1481
1482                                 case STANDARD_ANSI:
1483                                 case STANDARD_CXX98: c_mode = _CXX; break;
1484
1485 default_cxx_warn:
1486                                         fprintf(stderr,
1487                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1488                                                         invalid_mode);
1489                                 case STANDARD_DEFAULT:
1490                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1491                         }
1492
1493 do_parsing:
1494                         c_mode |= features_on;
1495                         c_mode &= ~features_off;
1496
1497                         /* do the actual parsing */
1498                         ir_timer_t *t_parsing = ir_timer_new();
1499                         timer_register(t_parsing, "Frontend: Parsing");
1500                         timer_push(t_parsing);
1501                         init_tokens();
1502                         translation_unit_t *const unit = do_parsing(in, filename);
1503                         timer_pop(t_parsing);
1504
1505                         /* prints the AST even if errors occurred */
1506                         if (mode == PrintAst) {
1507                                 print_to_file(out);
1508                                 print_ast(unit);
1509                         }
1510
1511                         if (error_count > 0) {
1512                                 /* parsing failed because of errors */
1513                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1514                                         warning_count);
1515                                 result = EXIT_FAILURE;
1516                                 continue;
1517                         } else if (warning_count > 0) {
1518                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1519                         }
1520
1521                         if (in == preprocessed_in) {
1522                                 int pp_result = pclose(preprocessed_in);
1523                                 if (pp_result != EXIT_SUCCESS) {
1524                                         /* remove output file */
1525                                         if (out != stdout)
1526                                                 unlink(outname);
1527                                         return EXIT_FAILURE;
1528                                 }
1529                         }
1530
1531                         if (mode == BenchmarkParser) {
1532                                 return result;
1533                         } else if (mode == PrintFluffy) {
1534                                 write_fluffy_decls(out, unit);
1535                                 continue;
1536                         } else if (mode == PrintCaml) {
1537                                 write_caml_decls(out, unit);
1538                                 continue;
1539                         } else if (mode == PrintJna) {
1540                                 write_jna_decls(out, unit);
1541                                 continue;
1542                         }
1543
1544                         /* build the firm graph */
1545                         ir_timer_t *t_construct = ir_timer_new();
1546                         timer_register(t_construct, "Frontend: Graph construction");
1547                         timer_push(t_construct);
1548                         if (already_constructed_firm) {
1549                                 panic("compiling multiple files/translation units not possible");
1550                         }
1551                         translation_unit_to_firm(unit);
1552                         already_constructed_firm = true;
1553                         timer_pop(t_construct);
1554
1555 graph_built:
1556                         if (mode == ParseOnly) {
1557                                 continue;
1558                         }
1559
1560                         if (mode == CompileDump) {
1561                                 /* find irg */
1562                                 ident    *id     = new_id_from_str(dumpfunction);
1563                                 ir_graph *irg    = NULL;
1564                                 int       n_irgs = get_irp_n_irgs();
1565                                 for (int i = 0; i < n_irgs; ++i) {
1566                                         ir_graph *tirg   = get_irp_irg(i);
1567                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1568                                         if (irg_id == id) {
1569                                                 irg = tirg;
1570                                                 break;
1571                                         }
1572                                 }
1573
1574                                 if (irg == NULL) {
1575                                         fprintf(stderr, "No graph for function '%s' found\n",
1576                                                 dumpfunction);
1577                                         return EXIT_FAILURE;
1578                                 }
1579
1580                                 dump_ir_graph_file(out, irg);
1581                                 fclose(out);
1582                                 return EXIT_SUCCESS;
1583                         }
1584
1585                         if (mode == CompileExportIR) {
1586                                 fclose(out);
1587                                 ir_export(outname);
1588                                 return EXIT_SUCCESS;
1589                         }
1590
1591                         gen_firm_finish(asm_out, filename, have_const_functions);
1592                         if (asm_out != out) {
1593                                 fclose(asm_out);
1594                         }
1595                 } else if (filetype == FILETYPE_IR) {
1596                         fclose(in);
1597                         ir_import(filename);
1598                         goto graph_built;
1599                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1600                         copy_file(asm_out, in);
1601                         if (in == preprocessed_in) {
1602                                 int pp_result = pclose(preprocessed_in);
1603                                 if (pp_result != EXIT_SUCCESS) {
1604                                         /* remove output in error case */
1605                                         if (out != stdout)
1606                                                 unlink(outname);
1607                                         return pp_result;
1608                                 }
1609                         }
1610                         if (asm_out != out) {
1611                                 fclose(asm_out);
1612                         }
1613                 }
1614
1615                 if (mode == Compile)
1616                         continue;
1617
1618                 /* if we're here then we have preprocessed assembly */
1619                 filename = asm_tempfile;
1620                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1621
1622                 /* assemble */
1623                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1624                         char        temp[1024];
1625                         const char *filename_o;
1626                         if (mode == CompileAssemble) {
1627                                 fclose(out);
1628                                 filename_o = outname;
1629                         } else {
1630                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1631                                 fclose(tempf);
1632                                 filename_o = temp;
1633                         }
1634
1635                         assemble(filename_o, filename);
1636
1637                         size_t len = strlen(filename_o) + 1;
1638                         filename = obstack_copy(&file_obst, filename_o, len);
1639                         filetype = FILETYPE_OBJECT;
1640                 }
1641
1642                 /* ok we're done here, process next file */
1643                 file->name = filename;
1644                 file->type = filetype;
1645         }
1646
1647         if (result != EXIT_SUCCESS) {
1648                 if (out != stdout)
1649                         unlink(outname);
1650                 return result;
1651         }
1652
1653         /* link program file */
1654         if (mode == CompileAssembleLink) {
1655                 obstack_1grow(&ldflags_obst, '\0');
1656                 const char *flags = obstack_finish(&ldflags_obst);
1657
1658                 /* construct commandline */
1659                 const char *linker = getenv("CPARSER_LINK");
1660                 if (linker != NULL) {
1661                         obstack_printf(&file_obst, "%s ", linker);
1662                 } else {
1663                         if (target_triple != NULL)
1664                                 obstack_printf(&file_obst, "%s-", target_triple);
1665                         obstack_printf(&file_obst, "%s ", LINKER);
1666                 }
1667
1668                 for (file_list_entry_t *entry = files; entry != NULL;
1669                                 entry = entry->next) {
1670                         if (entry->type != FILETYPE_OBJECT)
1671                                 continue;
1672
1673                         add_flag(&file_obst, "%s", entry->name);
1674                 }
1675
1676                 add_flag(&file_obst, "-o");
1677                 add_flag(&file_obst, outname);
1678                 obstack_printf(&file_obst, "%s", flags);
1679                 obstack_1grow(&file_obst, '\0');
1680
1681                 char *commandline = obstack_finish(&file_obst);
1682
1683                 if (verbose) {
1684                         puts(commandline);
1685                 }
1686                 int err = system(commandline);
1687                 if (err != EXIT_SUCCESS) {
1688                         fprintf(stderr, "linker reported an error\n");
1689                         return EXIT_FAILURE;
1690                 }
1691         }
1692
1693         if (do_timing)
1694                 timer_term(stderr);
1695
1696         obstack_free(&cppflags_obst, NULL);
1697         obstack_free(&ldflags_obst, NULL);
1698         obstack_free(&file_obst, NULL);
1699
1700         exit_mangle();
1701         exit_ast2firm();
1702         exit_parser();
1703         exit_ast();
1704         exit_lexer();
1705         exit_typehash();
1706         exit_types();
1707         exit_tokens();
1708         exit_symbol_table();
1709         return EXIT_SUCCESS;
1710 }