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 /** The current c mode/dialect. */
 105 unsigned int c_mode = _C89 | _ANSI | _C99 | _GNUC;
 106
 107 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
 108 unsigned int machine_size = 32;
 109
 110 /** true if the char type is signed. */
 111 bool char_is_signed = true;
 112
 113 /** true for strict language checking. */
 114 bool strict_mode = false;
 115
 116 /** use builtins for some libc functions */
 117 bool use_builtins = false;
 118
 119 /** we have extern function with const attribute. */
 120 bool have_const_functions = false;
 121
 122 atomic_type_kind_t wchar_atomic_kind = ATOMIC_TYPE_INT;
 123
 124 /* to switch on printing of implicit casts */
 125 extern bool print_implicit_casts;
 126
 127 /* to switch on printing of parenthesis to indicate operator precedence */
 128 extern bool print_parenthesis;
 129
 130 static int             verbose;
 131 static struct obstack  cppflags_obst, ldflags_obst;
 132 static char            dep_target[1024];
 133 static const char     *outname;
 134
 135 typedef enum lang_standard_t {
 136         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 137         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 138         STANDARD_C89,     /* ISO C90 (sic) */
 139         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 140         STANDARD_C99,     /* ISO C99 */
 141         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 142         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 143         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 144         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 145 } lang_standard_t;
 146
 147 static lang_standard_t standard;
 148
 149 typedef struct file_list_entry_t file_list_entry_t;
 150
 151 typedef enum filetype_t {
 152         FILETYPE_AUTODETECT,
 153         FILETYPE_C,
 154         FILETYPE_PREPROCESSED_C,
 155         FILETYPE_CXX,
 156         FILETYPE_PREPROCESSED_CXX,
 157         FILETYPE_ASSEMBLER,
 158         FILETYPE_PREPROCESSED_ASSEMBLER,
 159         FILETYPE_OBJECT,
 160         FILETYPE_IR,
 161         FILETYPE_UNKNOWN
 162 } filetype_t;
 163
 164 struct file_list_entry_t {
 165         const char  *name; /**< filename or NULL for stdin */
 166         filetype_t   type;
 167         file_list_entry_t *next;
 168 };
 169
 170 static file_list_entry_t *temp_files;
 171
 172 static void initialize_firm(void)
 173 {
 174         firm_early_init();
 175
 176         dump_consts_local(1);
 177         dump_keepalive_edges(1);
 178 }
 179
 180 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 181                             const char *newext)
 182 {
 183         if (inputname == NULL)
 184                 inputname = "a";
 185
 186         char const *const last_slash = strrchr(inputname, '/');
 187         char const *const filename   =
 188                 last_slash != NULL ? last_slash + 1 : inputname;
 189         char const *const last_dot   = strrchr(filename, '.');
 190         char const *const name_end   =
 191                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 192
 193         int const len = snprintf(buf, buflen, "%.*s%s",
 194                         (int)(name_end - filename), filename, newext);
 195 #ifdef _WIN32
 196         if (len < 0 || buflen <= (size_t)len)
 197 #else
 198         if (buflen <= (size_t)len)
 199 #endif
 200                 panic("filename too long");
 201 }
 202
 203 #include "gen_builtins.h"
 204
 205 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 206 {
 207         start_parsing();
 208
 209         if (use_builtins) {
 210                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 211                 parse();
 212         }
 213
 214         lexer_open_stream(in, input_name);
 215         parse();
 216
 217         translation_unit_t *unit = finish_parsing();
 218         return unit;
 219 }
 220
 221 static void lextest(FILE *in, const char *fname)
 222 {
 223         lexer_open_stream(in, fname);
 224
 225         do {
 226                 lexer_next_preprocessing_token();
 227                 print_token(stdout, &lexer_token);
 228                 putchar('\n');
 229         } while (lexer_token.type != T_EOF);
 230 }
 231
 232 static void add_flag(struct obstack *obst, const char *format, ...)
 233 {
 234         char buf[65536];
 235         va_list ap;
 236
 237         va_start(ap, format);
 238 #ifdef _WIN32
 239         int len =
 240 #endif
 241                 vsnprintf(buf, sizeof(buf), format, ap);
 242         va_end(ap);
 243
 244         obstack_1grow(obst, ' ');
 245 #ifdef _WIN32
 246         obstack_1grow(obst, '"');
 247         obstack_grow(obst, buf, len);
 248         obstack_1grow(obst, '"');
 249 #else
 250         /* escape stuff... */
 251         for (char *c = buf; *c != '\0'; ++c) {
 252                 switch(*c) {
 253                 case ' ':
 254                 case '"':
 255                 case '$':
 256                 case '&':
 257                 case '(':
 258                 case ')':
 259                 case ';':
 260                 case '<':
 261                 case '>':
 262                 case '\'':
 263                 case '\\':
 264                 case '\n':
 265                 case '\r':
 266                 case '\t':
 267                 case '`':
 268                 case '|':
 269                         obstack_1grow(obst, '\\');
 270                         /* FALLTHROUGH */
 271                 default:
 272                         obstack_1grow(obst, *c);
 273                         break;
 274                 }
 275         }
 276 #endif
 277 }
 278
 279 static const char *type_to_string(type_t *type)
 280 {
 281         assert(type->kind == TYPE_ATOMIC);
 282         return get_atomic_kind_name(type->atomic.akind);
 283 }
 284
 285 static FILE *preprocess(const char *fname, filetype_t filetype)
 286 {
 287         static const char *common_flags = NULL;
 288
 289         if (common_flags == NULL) {
 290                 obstack_1grow(&cppflags_obst, '\0');
 291                 const char *flags = obstack_finish(&cppflags_obst);
 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                 add_flag(&cppflags_obst, "-U__VERSION__");
 300                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 301
 302                 if (flags[0] != '\0') {
 303                         size_t len = strlen(flags);
 304                         obstack_1grow(&cppflags_obst, ' ');
 305                         obstack_grow(&cppflags_obst, flags, len);
 306                 }
 307                 obstack_1grow(&cppflags_obst, '\0');
 308                 common_flags = obstack_finish(&cppflags_obst);
 309         }
 310
 311         assert(obstack_object_size(&cppflags_obst) == 0);
 312
 313         const char *preprocessor = getenv("CPARSER_PP");
 314         if (preprocessor == NULL)
 315                 preprocessor = PREPROCESSOR;
 316
 317         obstack_printf(&cppflags_obst, "%s ", preprocessor);
 318         switch (filetype) {
 319         case FILETYPE_C:
 320                 add_flag(&cppflags_obst, "-std=c99");
 321                 break;
 322         case FILETYPE_CXX:
 323                 add_flag(&cppflags_obst, "-std=c++98");
 324                 break;
 325         case FILETYPE_ASSEMBLER:
 326                 add_flag(&cppflags_obst, "-x");
 327                 add_flag(&cppflags_obst, "assembler-with-cpp");
 328                 break;
 329         default:
 330                 break;
 331         }
 332         obstack_printf(&cppflags_obst, "%s", common_flags);
 333
 334         /* handle dependency generation */
 335         if (dep_target[0] != '\0') {
 336                 add_flag(&cppflags_obst, "-MF");
 337                 add_flag(&cppflags_obst, dep_target);
 338                 if (outname != NULL) {
 339                                 add_flag(&cppflags_obst, "-MQ");
 340                                 add_flag(&cppflags_obst, outname);
 341                 }
 342         }
 343         add_flag(&cppflags_obst, fname);
 344
 345         obstack_1grow(&cppflags_obst, '\0');
 346         char *buf = obstack_finish(&cppflags_obst);
 347         if (verbose) {
 348                 puts(buf);
 349         }
 350
 351         FILE *f = popen(buf, "r");
 352         if (f == NULL) {
 353                 fprintf(stderr, "invoking preprocessor failed\n");
 354                 exit(1);
 355         }
 356
 357         /* we don't really need that anymore */
 358         obstack_free(&cppflags_obst, buf);
 359
 360         return f;
 361 }
 362
 363 static void assemble(const char *out, const char *in)
 364 {
 365         char buf[65536];
 366
 367         const char *assembler = getenv("CPARSER_AS");
 368         if (assembler == NULL)
 369                 assembler = ASSEMBLER;
 370
 371         snprintf(buf, sizeof(buf), "%s %s -o %s", assembler, in, out);
 372         if (verbose) {
 373                 puts(buf);
 374         }
 375
 376         int err = system(buf);
 377         if (err != 0) {
 378                 fprintf(stderr, "assembler reported an error\n");
 379                 exit(1);
 380         }
 381 }
 382
 383 static void print_file_name(const char *file)
 384 {
 385         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 386
 387         obstack_1grow(&ldflags_obst, '\0');
 388         const char *flags = obstack_finish(&ldflags_obst);
 389
 390         /* construct commandline */
 391         const char *linker = getenv("CPARSER_LINK");
 392         if (linker == NULL)
 393                 linker = LINKER;
 394         obstack_printf(&ldflags_obst, "%s ", linker);
 395         obstack_printf(&ldflags_obst, "%s", flags);
 396         obstack_1grow(&ldflags_obst, '\0');
 397
 398         char *commandline = obstack_finish(&ldflags_obst);
 399
 400         if (verbose) {
 401                 puts(commandline);
 402         }
 403         int err = system(commandline);
 404         if (err != EXIT_SUCCESS) {
 405                 fprintf(stderr, "linker reported an error\n");
 406                 exit(1);
 407         }
 408 }
 409
 410 static const char *try_dir(const char *dir)
 411 {
 412         if (dir == NULL)
 413                 return dir;
 414         if (access(dir, R_OK | W_OK | X_OK) == 0)
 415                 return dir;
 416         return NULL;
 417 }
 418
 419 static const char *get_tempdir(void)
 420 {
 421         static const char *tmpdir = NULL;
 422
 423         if (tmpdir != NULL)
 424                 return tmpdir;
 425
 426         if (tmpdir == NULL)
 427                 tmpdir = try_dir(getenv("TMPDIR"));
 428         if (tmpdir == NULL)
 429                 tmpdir = try_dir(getenv("TMP"));
 430         if (tmpdir == NULL)
 431                 tmpdir = try_dir(getenv("TEMP"));
 432
 433 #ifdef P_tmpdir
 434         if (tmpdir == NULL)
 435                 tmpdir = try_dir(P_tmpdir);
 436 #endif
 437
 438         if (tmpdir == NULL)
 439                 tmpdir = try_dir("/var/tmp");
 440         if (tmpdir == NULL)
 441                 tmpdir = try_dir("/usr/tmp");
 442         if (tmpdir == NULL)
 443                 tmpdir = try_dir("/tmp");
 444
 445         if (tmpdir == NULL)
 446                 tmpdir = ".";
 447
 448         return tmpdir;
 449 }
 450
 451 #ifndef HAVE_MKSTEMP
 452 /* cheap and nasty mkstemp replacement */
 453 static int mkstemp(char *templ)
 454 {
 455         mktemp(templ);
 456         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 457 }
 458 #endif
 459
 460 /**
 461  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 462  * during linking (like glibc/gnu ld do for tmpnam)...
 463  */
 464 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 465 {
 466         const char *tempdir = get_tempdir();
 467
 468         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 469
 470         int fd = mkstemp(buffer);
 471         if (fd == -1) {
 472                 fprintf(stderr, "couldn't create temporary file: %s\n",
 473                         strerror(errno));
 474                 exit(1);
 475         }
 476         FILE *out = fdopen(fd, "w");
 477         if (out == NULL) {
 478                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 479                 exit(1);
 480         }
 481
 482         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 483         memset(entry, 0, sizeof(*entry));
 484
 485         size_t  name_len = strlen(buffer) + 1;
 486         char   *name     = malloc(name_len);
 487         memcpy(name, buffer, name_len);
 488         entry->name      = name;
 489
 490         entry->next = temp_files;
 491         temp_files  = entry;
 492
 493         return out;
 494 }
 495
 496 static void free_temp_files(void)
 497 {
 498         file_list_entry_t *entry = temp_files;
 499         file_list_entry_t *next;
 500         for ( ; entry != NULL; entry = next) {
 501                 next = entry->next;
 502
 503                 unlink(entry->name);
 504                 free((char*) entry->name);
 505                 free(entry);
 506         }
 507         temp_files = NULL;
 508 }
 509
 510 /**
 511  * Do the necessary lowering for compound parameters.
 512  */
 513 void lower_compound_params(void)
 514 {
 515         lower_params_t params;
 516
 517         params.def_ptr_alignment    = 4;
 518         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 519         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 520         params.find_pointer_type    = NULL;
 521         params.ret_compound_in_regs = NULL;
 522         lower_calls_with_compounds(&params);
 523 }
 524
 525 typedef enum compile_mode_t {
 526         BenchmarkParser,
 527         PreprocessOnly,
 528         ParseOnly,
 529         Compile,
 530         CompileDump,
 531         CompileExportIR,
 532         CompileAssemble,
 533         CompileAssembleLink,
 534         LexTest,
 535         PrintAst,
 536         PrintFluffy,
 537         PrintCaml,
 538         PrintJna
 539 } compile_mode_t;
 540
 541 static void usage(const char *argv0)
 542 {
 543         fprintf(stderr, "Usage %s [options] input [-o output]\n", argv0);
 544 }
 545
 546 static void print_cparser_version(void)
 547 {
 548         printf("cparser (%s) using libFirm (%u.%u",
 549                cparser_REVISION, ir_get_version_major(),
 550                ir_get_version_minor());
 551
 552         const char *revision = ir_get_version_revision();
 553         if (revision[0] != 0) {
 554                 putchar(' ');
 555                 fputs(revision, stdout);
 556         }
 557
 558         const char *build = ir_get_version_build();
 559         if (build[0] != 0) {
 560                 putchar(' ');
 561                 fputs(build, stdout);
 562         }
 563         puts(")");
 564         puts("This is free software; see the source for copying conditions.  There is NO\n"
 565              "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
 566 }
 567
 568 static void print_help(const char *argv0)
 569 {
 570         usage(argv0);
 571         puts("");
 572         puts("\t-fhelp     Display help about firm optimisation options");
 573         puts("\t-bhelp     Display help about firm backend options");
 574         puts("A big number of gcc flags is also supported");
 575 }
 576
 577 static void set_be_option(const char *arg)
 578 {
 579         int res = be_parse_arg(arg);
 580         (void) res;
 581         assert(res);
 582 }
 583
 584 static void set_option(const char *arg)
 585 {
 586         int res = firm_option(arg);
 587         (void) res;
 588         assert(res);
 589 }
 590
 591 static void copy_file(FILE *dest, FILE *input)
 592 {
 593         char buf[16384];
 594
 595         while (!feof(input) && !ferror(dest)) {
 596                 size_t read = fread(buf, 1, sizeof(buf), input);
 597                 if (fwrite(buf, 1, read, dest) != read) {
 598                         perror("couldn't write output");
 599                 }
 600         }
 601 }
 602
 603 static inline bool streq(char const* a, char const* b)
 604 {
 605         return strcmp(a, b) == 0;
 606 }
 607
 608 static inline bool strstart(char const* str, char const* start)
 609 {
 610         do {
 611                 if (*start == '\0')
 612                         return true;
 613         } while (*str++ == *start++);
 614         return false;
 615 }
 616
 617 static FILE *open_file(const char *filename)
 618 {
 619         if (streq(filename, "-")) {
 620                 return stdin;
 621         }
 622
 623         FILE *in = fopen(filename, "r");
 624         if (in == NULL) {
 625                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 626                                 strerror(errno));
 627                 exit(1);
 628         }
 629
 630         return in;
 631 }
 632
 633 static filetype_t get_filetype_from_string(const char *string)
 634 {
 635         if (streq(string, "c") || streq(string, "c-header"))
 636                 return FILETYPE_C;
 637         if (streq(string, "c++") || streq(string, "c++-header"))
 638                 return FILETYPE_CXX;
 639         if (streq(string, "assembler"))
 640                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 641         if (streq(string, "assembler-with-cpp"))
 642                 return FILETYPE_ASSEMBLER;
 643         if (streq(string, "none"))
 644                 return FILETYPE_AUTODETECT;
 645
 646         return FILETYPE_UNKNOWN;
 647 }
 648
 649 static void init_os_support(void)
 650 {
 651         /* OS option must be set to the backend */
 652         switch (firm_opt.os_support) {
 653         case OS_SUPPORT_MINGW:
 654                 set_be_option("ia32-gasmode=mingw");
 655                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 656                 break;
 657         case OS_SUPPORT_LINUX:
 658                 set_be_option("ia32-gasmode=elf");
 659                 break;
 660         case OS_SUPPORT_MACHO:
 661                 set_be_option("ia32-gasmode=macho");
 662                 set_be_option("ia32-stackalign=4");
 663                 set_be_option("pic");
 664                 break;
 665         }
 666 }
 667
 668 int main(int argc, char **argv)
 669 {
 670         initialize_firm();
 671
 672         const char        *dumpfunction         = NULL;
 673         const char        *print_file_name_file = NULL;
 674         compile_mode_t     mode                 = CompileAssembleLink;
 675         int                opt_level            = 1;
 676         int                result               = EXIT_SUCCESS;
 677         char               cpu_arch[16]         = "ia32";
 678         file_list_entry_t *files                = NULL;
 679         file_list_entry_t *last_file            = NULL;
 680         bool               construct_dep_target = false;
 681         bool               do_timing            = false;
 682         struct obstack     file_obst;
 683
 684         atexit(free_temp_files);
 685
 686         /* hack for now... */
 687         if (strstr(argv[0], "pptest") != NULL) {
 688                 extern int pptest_main(int argc, char **argv);
 689                 return pptest_main(argc, argv);
 690         }
 691
 692         obstack_init(&cppflags_obst);
 693         obstack_init(&ldflags_obst);
 694         obstack_init(&file_obst);
 695
 696 #define GET_ARG_AFTER(def, args)                                             \
 697         def = &arg[sizeof(args)-1];                                              \
 698         if (def[0] == '\0') {                                                     \
 699                 ++i;                                                                 \
 700                 if (i >= argc) {                                                      \
 701                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 702                         argument_errors = true;                                          \
 703                         break;                                                           \
 704                 }                                                                    \
 705                 def = argv[i];                                                       \
 706                 if (def[0] == '-' && def[1] != '\0') {                                \
 707                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 708                         argument_errors = true;                                          \
 709                         continue;                                                        \
 710                 }                                                                    \
 711         }
 712
 713 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 714
 715         /* early options parsing (find out optimisation level and OS) */
 716         for (int i = 1; i < argc; ++i) {
 717                 const char *arg = argv[i];
 718                 if (arg[0] != '-')
 719                         continue;
 720
 721                 const char *option = &arg[1];
 722                 if (option[0] == 'O') {
 723                         sscanf(&option[1], "%d", &opt_level);
 724                 }
 725                 if (strcmp(arg, "-fwin32") == 0) {
 726                         firm_opt.os_support = OS_SUPPORT_MINGW;
 727                 } else if (strcmp(arg, "-fmac") == 0) {
 728                         firm_opt.os_support = OS_SUPPORT_MACHO;
 729                 } else if (strcmp(arg, "-flinux") == 0) {
 730                         firm_opt.os_support = OS_SUPPORT_LINUX;
 731                 }
 732         }
 733
 734         /* set target/os specific stuff */
 735         init_os_support();
 736
 737         /* apply optimisation level */
 738         switch(opt_level) {
 739         case 0:
 740                 set_option("no-opt");
 741                 break;
 742         case 1:
 743                 set_option("no-inline");
 744                 break;
 745         default:
 746         case 4:
 747                 /* use_builtins = true; */
 748                 /* fallthrough */
 749         case 3:
 750                 set_option("thread-jumps");
 751                 set_option("if-conversion");
 752                 /* fallthrough */
 753         case 2:
 754                 set_option("strict-aliasing");
 755                 set_option("inline");
 756                 set_option("deconv");
 757                 set_be_option("omitfp");
 758                 break;
 759         }
 760
 761         /* parse rest of options */
 762         standard                        = STANDARD_DEFAULT;
 763         unsigned        features_on     = 0;
 764         unsigned        features_off    = 0;
 765         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 766         bool            help_displayed  = false;
 767         bool            argument_errors = false;
 768         for (int i = 1; i < argc; ++i) {
 769                 const char *arg = argv[i];
 770                 if (arg[0] == '-' && arg[1] != '\0') {
 771                         /* an option */
 772                         const char *option = &arg[1];
 773                         if (option[0] == 'o') {
 774                                 GET_ARG_AFTER(outname, "-o");
 775                         } else if (option[0] == 'g') {
 776                                 set_be_option("debuginfo=stabs");
 777                                 set_be_option("omitfp=no");
 778                                 set_be_option("ia32-nooptcc=yes");
 779                         } else if (SINGLE_OPTION('c')) {
 780                                 mode = CompileAssemble;
 781                         } else if (SINGLE_OPTION('E')) {
 782                                 mode = PreprocessOnly;
 783                         } else if (SINGLE_OPTION('S')) {
 784                                 mode = Compile;
 785                         } else if (option[0] == 'O') {
 786                                 continue;
 787                         } else if (option[0] == 'I') {
 788                                 const char *opt;
 789                                 GET_ARG_AFTER(opt, "-I");
 790                                 add_flag(&cppflags_obst, "-I%s", opt);
 791                         } else if (option[0] == 'D') {
 792                                 const char *opt;
 793                                 GET_ARG_AFTER(opt, "-D");
 794                                 add_flag(&cppflags_obst, "-D%s", opt);
 795                         } else if (option[0] == 'U') {
 796                                 const char *opt;
 797                                 GET_ARG_AFTER(opt, "-U");
 798                                 add_flag(&cppflags_obst, "-U%s", opt);
 799                         } else if (option[0] == 'l') {
 800                                 const char *opt;
 801                                 GET_ARG_AFTER(opt, "-l");
 802                                 add_flag(&ldflags_obst, "-l%s", opt);
 803                         } else if (option[0] == 'L') {
 804                                 const char *opt;
 805                                 GET_ARG_AFTER(opt, "-L");
 806                                 add_flag(&ldflags_obst, "-L%s", opt);
 807                         } else if (SINGLE_OPTION('v')) {
 808                                 verbose = 1;
 809                         } else if (SINGLE_OPTION('w')) {
 810                                 memset(&warning, 0, sizeof(warning));
 811                         } else if (option[0] == 'x') {
 812                                 const char *opt;
 813                                 GET_ARG_AFTER(opt, "-x");
 814                                 forced_filetype = get_filetype_from_string(opt);
 815                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 816                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 817                                         argument_errors = true;
 818                                 }
 819                         } else if (streq(option, "M")) {
 820                                 mode = PreprocessOnly;
 821                                 add_flag(&cppflags_obst, "-M");
 822                         } else if (streq(option, "MMD") ||
 823                                    streq(option, "MD")) {
 824                             construct_dep_target = true;
 825                                 add_flag(&cppflags_obst, "-%s", option);
 826                         } else if (streq(option, "MM")  ||
 827                                    streq(option, "MP")) {
 828                                 add_flag(&cppflags_obst, "-%s", option);
 829                         } else if (streq(option, "MT") ||
 830                                    streq(option, "MQ") ||
 831                                    streq(option, "MF")) {
 832                                 const char *opt;
 833                                 GET_ARG_AFTER(opt, "-MT");
 834                                 add_flag(&cppflags_obst, "-%s", option);
 835                                 add_flag(&cppflags_obst, "%s", opt);
 836                         } else if (streq(option, "include")) {
 837                                 const char *opt;
 838                                 GET_ARG_AFTER(opt, "-include");
 839                                 add_flag(&cppflags_obst, "-include");
 840                                 add_flag(&cppflags_obst, "%s", opt);
 841                         } else if (streq(option, "isystem")) {
 842                                 const char *opt;
 843                                 GET_ARG_AFTER(opt, "-isystem");
 844                                 add_flag(&cppflags_obst, "-isystem");
 845                                 add_flag(&cppflags_obst, "%s", opt);
 846                         } else if (streq(option, "nostdinc")
 847                                         || streq(option, "trigraphs")) {
 848                                 /* pass these through to the preprocessor */
 849                                 add_flag(&cppflags_obst, "%s", arg);
 850                         } else if (streq(option, "pipe")) {
 851                                 /* here for gcc compatibility */
 852                         } else if (option[0] == 'f') {
 853                                 char const *orig_opt;
 854                                 GET_ARG_AFTER(orig_opt, "-f");
 855
 856                                 if (strstart(orig_opt, "input-charset=")) {
 857                                         char const* const encoding = strchr(orig_opt, '=') + 1;
 858                                         select_input_encoding(encoding);
 859                                 } else if (streq(orig_opt, "verbose-asm")) {
 860                                         /* ignore: we always print verbose assembler */
 861                                 } else {
 862                                         char const *opt         = orig_opt;
 863                                         bool        truth_value = true;
 864                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 865                                                 truth_value = false;
 866                                                 opt += 3;
 867                                         }
 868
 869                                         if (streq(opt, "builtins")) {
 870                                                 use_builtins = truth_value;
 871                                         } else if (streq(opt, "dollars-in-identifiers")) {
 872                                                 allow_dollar_in_symbol = truth_value;
 873                                         } else if (streq(opt, "omit-frame-pointer")) {
 874                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 875                                         } else if (streq(opt, "short-wchar")) {
 876                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 877                                                         : ATOMIC_TYPE_INT;
 878                                         } else if (streq(opt, "signed-char")) {
 879                                                 char_is_signed = truth_value;
 880                                         } else if (streq(opt, "strength-reduce")) {
 881                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 882                                         } else if (streq(opt, "syntax-only")) {
 883                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 884                                         } else if (streq(opt, "unsigned-char")) {
 885                                                 char_is_signed = !truth_value;
 886                                         } else if (truth_value == false &&
 887                                                    streq(opt, "asynchronous-unwind-tables")) {
 888                                             /* nothing todo, a gcc feature which we don't support
 889                                              * anyway was deactivated */
 890                                         } else if (strstart(orig_opt, "align-loops=") ||
 891                                                         strstart(orig_opt, "align-jumps=") ||
 892                                                         strstart(orig_opt, "align-functions=")) {
 893                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 894                                         } else if (streq(opt, "fast-math")               ||
 895                                                    streq(opt, "jump-tables")             ||
 896                                                    streq(opt, "expensive-optimizations") ||
 897                                                    streq(opt, "common")                  ||
 898                                                    streq(opt, "optimize-sibling-calls")  ||
 899                                                    streq(opt, "align-loops")             ||
 900                                                    streq(opt, "align-jumps")             ||
 901                                                    streq(opt, "align-functions")         ||
 902                                                    streq(opt, "PIC")) {
 903                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 904                                         } else {
 905                                                 int res = firm_option(orig_opt);
 906                                                 if (res == 0) {
 907                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 908                                                                 orig_opt);
 909                                                         argument_errors = true;
 910                                                         continue;
 911                                                 } else if (res == -1) {
 912                                                         help_displayed = true;
 913                                                 }
 914                                         }
 915                                 }
 916                         } else if (option[0] == 'b') {
 917                                 const char *opt;
 918                                 GET_ARG_AFTER(opt, "-b");
 919                                 int res = be_parse_arg(opt);
 920                                 if (res == 0) {
 921                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 922                                                 opt);
 923                                         argument_errors = true;
 924                                 } else if (res == -1) {
 925                                         help_displayed = true;
 926                                 } else if (strstart(opt, "isa=")) {
 927                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 928                                 }
 929                         } else if (option[0] == 'W') {
 930                                 if (option[1] == '\0') {
 931                                         /* ignore -W, out defaults are already quiet verbose */
 932                                 } else if (strstart(option + 1, "p,")) {
 933                                         // pass options directly to the preprocessor
 934                                         const char *opt;
 935                                         GET_ARG_AFTER(opt, "-Wp,");
 936                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 937                                 } else if (strstart(option + 1, "l,")) {
 938                                         // pass options directly to the linker
 939                                         const char *opt;
 940                                         GET_ARG_AFTER(opt, "-Wl,");
 941                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 942                                 } else if (streq(option + 1, "no-trigraphs")
 943                                                         || streq(option + 1, "undef")) {
 944                                         add_flag(&cppflags_obst, "%s", arg);
 945                                 } else {
 946                                         set_warning_opt(&option[1]);
 947                                 }
 948                         } else if (option[0] == 'm') {
 949                                 /* -m options */
 950                                 const char *opt;
 951                                 char arch_opt[64];
 952
 953                                 GET_ARG_AFTER(opt, "-m");
 954                                 if (strstart(opt, "arch=")) {
 955                                         GET_ARG_AFTER(opt, "-march=");
 956                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 957                                         int res = be_parse_arg(arch_opt);
 958                                         if (res == 0) {
 959                                                 fprintf(stderr, "Unknown architecture '%s'\n", arch_opt);
 960                                                 argument_errors = true;
 961                                         } else {
 962                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 963                                                 int res = be_parse_arg(arch_opt);
 964                                                 if (res == 0)
 965                                                         argument_errors = true;
 966                                         }
 967                                 } else if (strstart(opt, "tune=")) {
 968                                         GET_ARG_AFTER(opt, "-mtune=");
 969                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 970                                         int res = be_parse_arg(arch_opt);
 971                                         if (res == 0)
 972                                                 argument_errors = true;
 973                                 } else if (strstart(opt, "cpu=")) {
 974                                         GET_ARG_AFTER(opt, "-mcpu=");
 975                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 976                                         int res = be_parse_arg(arch_opt);
 977                                         if (res == 0)
 978                                                 argument_errors = true;
 979                                 } else if (strstart(opt, "fpmath=")) {
 980                                         GET_ARG_AFTER(opt, "-mfpmath=");
 981                                         if (streq(opt, "387"))
 982                                                 opt = "x87";
 983                                         else if (streq(opt, "sse"))
 984                                                 opt = "sse2";
 985                                         else {
 986                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 987                                                 argument_errors = true;
 988                                         }
 989                                         if (!argument_errors) {
 990                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 991                                                 int res = be_parse_arg(arch_opt);
 992                                                 if (res == 0)
 993                                                         argument_errors = true;
 994                                         }
 995                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 996                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 997                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 998                                         int res = be_parse_arg(arch_opt);
 999                                         if (res == 0)
1000                                                 argument_errors = true;
1001                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
1002                                         set_be_option("omitleaffp=1");
1003                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
1004                                         set_be_option("omitleaffp=0");
1005                                 } else if (streq(opt, "rtd")) {
1006                                         default_calling_convention = CC_STDCALL;
1007                                 } else if (strstart(opt, "regparm=")) {
1008                                         fprintf(stderr, "error: regparm convention not supported yet\n");
1009                                         argument_errors = true;
1010                                 } else if (streq(opt, "soft-float")) {
1011                                         fprintf(stderr, "error: software floatingpoint not supported yet\n");
1012                                         argument_errors = true;
1013                                 } else {
1014                                         char *endptr;
1015                                         long int value = strtol(opt, &endptr, 10);
1016                                         if (*endptr != '\0') {
1017                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
1018                                                 argument_errors = true;
1019                                         }
1020                                         if (value != 16 && value != 32 && value != 64) {
1021                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
1022                                                 argument_errors = true;
1023                                         } else {
1024                                                 machine_size = (unsigned int)value;
1025                                         }
1026                                 }
1027                         } else if (streq(option, "pg")) {
1028                                 set_be_option("gprof");
1029                                 add_flag(&ldflags_obst, "-pg");
1030                         } else if (streq(option, "pedantic") ||
1031                                    streq(option, "ansi")) {
1032                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1033                         } else if (streq(option, "shared")) {
1034                                 add_flag(&ldflags_obst, "-shared");
1035                         } else if (strstart(option, "std=")) {
1036                                 const char *const o = &option[4];
1037                                 standard =
1038                                         streq(o, "c++")            ? STANDARD_CXX98   :
1039                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1040                                         streq(o, "c89")            ? STANDARD_C89     :
1041                                         streq(o, "c99")            ? STANDARD_C99     :
1042                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1043                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1044                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1045                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1046                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1047                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1048                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1049                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1050                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1051                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1052                         } else if (streq(option, "version")) {
1053                                 print_cparser_version();
1054                         } else if (strstart(option, "print-file-name=")) {
1055                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1056                         } else if (option[0] == '-') {
1057                                 /* double dash option */
1058                                 ++option;
1059                                 if (streq(option, "gcc")) {
1060                                         features_on  |=  _GNUC;
1061                                         features_off &= ~_GNUC;
1062                                 } else if (streq(option, "no-gcc")) {
1063                                         features_on  &= ~_GNUC;
1064                                         features_off |=  _GNUC;
1065                                 } else if (streq(option, "ms")) {
1066                                         features_on  |=  _MS;
1067                                         features_off &= ~_MS;
1068                                 } else if (streq(option, "no-ms")) {
1069                                         features_on  &= ~_MS;
1070                                         features_off |=  _MS;
1071                                 } else if (streq(option, "strict")) {
1072                                         strict_mode = true;
1073                                 } else if (streq(option, "lextest")) {
1074                                         mode = LexTest;
1075                                 } else if (streq(option, "benchmark")) {
1076                                         mode = BenchmarkParser;
1077                                 } else if (streq(option, "print-ast")) {
1078                                         mode = PrintAst;
1079                                 } else if (streq(option, "print-implicit-cast")) {
1080                                         print_implicit_casts = true;
1081                                 } else if (streq(option, "print-parenthesis")) {
1082                                         print_parenthesis = true;
1083                                 } else if (streq(option, "print-fluffy")) {
1084                                         mode = PrintFluffy;
1085                                 } else if (streq(option, "print-caml")) {
1086                                         mode = PrintCaml;
1087                                 } else if (streq(option, "print-jna")) {
1088                                         mode = PrintJna;
1089                                 } else if (streq(option, "time")) {
1090                                         do_timing = true;
1091                                 } else if (streq(option, "version")) {
1092                                         print_cparser_version();
1093                                         exit(EXIT_SUCCESS);
1094                                 } else if (streq(option, "help")) {
1095                                         print_help(argv[0]);
1096                                         help_displayed = true;
1097                                 } else if (streq(option, "dump-function")) {
1098                                         ++i;
1099                                         if (i >= argc) {
1100                                                 fprintf(stderr, "error: "
1101                                                         "expected argument after '--dump-function'\n");
1102                                                 argument_errors = true;
1103                                                 break;
1104                                         }
1105                                         dumpfunction = argv[i];
1106                                         mode         = CompileDump;
1107                                 } else if (streq(option, "export-ir")) {
1108                                         mode = CompileExportIR;
1109                                 } else {
1110                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1111                                         argument_errors = true;
1112                                 }
1113                         } else {
1114                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1115                                 argument_errors = true;
1116                         }
1117                 } else {
1118                         filetype_t type = forced_filetype;
1119                         if (type == FILETYPE_AUTODETECT) {
1120                                 if (streq(arg, "-")) {
1121                                         /* - implicitly means C source file */
1122                                         type = FILETYPE_C;
1123                                 } else {
1124                                         const char *suffix = strrchr(arg, '.');
1125                                         /* Ensure there is at least one char before the suffix */
1126                                         if (suffix != NULL && suffix != arg) {
1127                                                 ++suffix;
1128                                                 type =
1129                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1130                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1131                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1132                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1133                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1134                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1135                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1136                                                         streq(suffix, "ir")  ? FILETYPE_IR                     :
1137                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1138                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1139                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1140                                                         FILETYPE_AUTODETECT;
1141                                         }
1142                                 }
1143
1144                                 if (type == FILETYPE_AUTODETECT) {
1145                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
1146                                         continue;
1147                                 }
1148                         }
1149
1150                         file_list_entry_t *entry
1151                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1152                         memset(entry, 0, sizeof(entry[0]));
1153                         entry->name = arg;
1154                         entry->type = type;
1155
1156                         if (last_file != NULL) {
1157                                 last_file->next = entry;
1158                         } else {
1159                                 files = entry;
1160                         }
1161                         last_file = entry;
1162                 }
1163         }
1164
1165         if (help_displayed) {
1166                 return !argument_errors;
1167         }
1168
1169         if (print_file_name_file != NULL) {
1170                 print_file_name(print_file_name_file);
1171                 return 0;
1172         }
1173         if (files == NULL) {
1174                 fprintf(stderr, "error: no input files specified\n");
1175                 argument_errors = true;
1176         }
1177
1178         if (argument_errors) {
1179                 usage(argv[0]);
1180                 return 1;
1181         }
1182
1183         /* we do the lowering in ast2firm */
1184         firm_opt.lower_bitfields = FALSE;
1185
1186         /* set the c_mode here, types depends on it */
1187         c_mode |= features_on;
1188         c_mode &= ~features_off;
1189
1190         gen_firm_init();
1191         init_symbol_table();
1192         init_types();
1193         init_typehash();
1194         init_basic_types();
1195         init_lexer();
1196         init_ast();
1197         init_parser();
1198         init_ast2firm();
1199         init_mangle();
1200
1201         if (do_timing)
1202                 timer_init();
1203
1204         if (construct_dep_target) {
1205                 if (outname != 0 && strlen(outname) >= 2) {
1206                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1207                 } else {
1208                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1209                 }
1210         } else {
1211                 dep_target[0] = '\0';
1212         }
1213
1214         char outnamebuf[4096];
1215         if (outname == NULL) {
1216                 const char *filename = files->name;
1217
1218                 switch(mode) {
1219                 case BenchmarkParser:
1220                 case PrintAst:
1221                 case PrintFluffy:
1222                 case PrintCaml:
1223                 case PrintJna:
1224                 case LexTest:
1225                 case PreprocessOnly:
1226                 case ParseOnly:
1227                         outname = "-";
1228                         break;
1229                 case Compile:
1230                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1231                         outname = outnamebuf;
1232                         break;
1233                 case CompileAssemble:
1234                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1235                         outname = outnamebuf;
1236                         break;
1237                 case CompileDump:
1238                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1239                                         ".vcg");
1240                         outname = outnamebuf;
1241                         break;
1242                 case CompileExportIR:
1243                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
1244                         outname = outnamebuf;
1245                         break;
1246                 case CompileAssembleLink:
1247 #ifdef _WIN32
1248                         outname = "a.exe";
1249 #else
1250                         outname = "a.out";
1251 #endif
1252                         break;
1253                 }
1254         }
1255
1256         assert(outname != NULL);
1257
1258         FILE *out;
1259         if (streq(outname, "-")) {
1260                 out = stdout;
1261         } else {
1262                 out = fopen(outname, "w");
1263                 if (out == NULL) {
1264                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1265                                         strerror(errno));
1266                         return 1;
1267                 }
1268         }
1269
1270         file_list_entry_t *file;
1271         bool               already_constructed_firm = false;
1272         for (file = files; file != NULL; file = file->next) {
1273                 char        asm_tempfile[1024];
1274                 const char *filename = file->name;
1275                 filetype_t  filetype = file->type;
1276
1277                 if (filetype == FILETYPE_OBJECT)
1278                         continue;
1279
1280                 FILE *in = NULL;
1281                 if (mode == LexTest) {
1282                         if (in == NULL)
1283                                 in = open_file(filename);
1284                         lextest(in, filename);
1285                         fclose(in);
1286                         exit(EXIT_SUCCESS);
1287                 }
1288
1289                 FILE *preprocessed_in = NULL;
1290                 filetype_t next_filetype = filetype;
1291                 switch (filetype) {
1292                         case FILETYPE_C:
1293                                 next_filetype = FILETYPE_PREPROCESSED_C;
1294                                 goto preprocess;
1295                         case FILETYPE_CXX:
1296                                 next_filetype = FILETYPE_PREPROCESSED_CXX;
1297                                 goto preprocess;
1298                         case FILETYPE_ASSEMBLER:
1299                                 next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1300                                 goto preprocess;
1301 preprocess:
1302                                 /* no support for input on FILE* yet */
1303                                 if (in != NULL)
1304                                         panic("internal compiler error: in for preprocessor != NULL");
1305
1306                                 preprocessed_in = preprocess(filename, filetype);
1307                                 if (mode == PreprocessOnly) {
1308                                         copy_file(out, preprocessed_in);
1309                                         int result = pclose(preprocessed_in);
1310                                         fclose(out);
1311                                         /* remove output file in case of error */
1312                                         if (out != stdout && result != EXIT_SUCCESS) {
1313                                                 unlink(outname);
1314                                         }
1315                                         return result;
1316                                 }
1317
1318                                 in = preprocessed_in;
1319                                 filetype = next_filetype;
1320                                 break;
1321
1322                         default:
1323                                 break;
1324                 }
1325
1326                 FILE *asm_out;
1327                 if (mode == Compile) {
1328                         asm_out = out;
1329                 } else {
1330                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1331                 }
1332
1333                 if (in == NULL)
1334                         in = open_file(filename);
1335
1336                 /* preprocess and compile */
1337                 if (filetype == FILETYPE_PREPROCESSED_C) {
1338                         char const* invalid_mode;
1339                         switch (standard) {
1340                                 case STANDARD_ANSI:
1341                                 case STANDARD_C89:   c_mode = _C89;                break;
1342                                 /* TODO determine difference between these two */
1343                                 case STANDARD_C90:   c_mode = _C89;                break;
1344                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1345                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1346
1347 default_c_warn:
1348                                         fprintf(stderr,
1349                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1350                                                         invalid_mode);
1351                                         /* FALLTHROUGH */
1352                                 case STANDARD_DEFAULT:
1353                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1354
1355                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1356                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1357                         }
1358                         goto do_parsing;
1359                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1360                         char const* invalid_mode;
1361                         switch (standard) {
1362                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1363                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1364                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1365                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1366                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1367
1368                                 case STANDARD_ANSI:
1369                                 case STANDARD_CXX98: c_mode = _CXX; break;
1370
1371 default_cxx_warn:
1372                                         fprintf(stderr,
1373                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1374                                                         invalid_mode);
1375                                 case STANDARD_DEFAULT:
1376                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1377                         }
1378
1379 do_parsing:
1380                         c_mode |= features_on;
1381                         c_mode &= ~features_off;
1382
1383                         /* do the actual parsing */
1384                         ir_timer_t *t_parsing = ir_timer_new();
1385                         timer_register(t_parsing, "Frontend: Parsing");
1386                         timer_push(t_parsing);
1387                         init_tokens();
1388                         translation_unit_t *const unit = do_parsing(in, filename);
1389                         timer_pop(t_parsing);
1390
1391                         /* prints the AST even if errors occurred */
1392                         if (mode == PrintAst) {
1393                                 print_to_file(out);
1394                                 print_ast(unit);
1395                         }
1396
1397                         if (error_count > 0) {
1398                                 /* parsing failed because of errors */
1399                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1400                                         warning_count);
1401                                 result = EXIT_FAILURE;
1402                                 continue;
1403                         } else if (warning_count > 0) {
1404                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1405                         }
1406
1407                         if (in == preprocessed_in) {
1408                                 int pp_result = pclose(preprocessed_in);
1409                                 if (pp_result != EXIT_SUCCESS) {
1410                                         /* remove output file */
1411                                         if (out != stdout)
1412                                                 unlink(outname);
1413                                         exit(EXIT_FAILURE);
1414                                 }
1415                         }
1416
1417                         if (mode == BenchmarkParser) {
1418                                 return result;
1419                         } else if (mode == PrintFluffy) {
1420                                 write_fluffy_decls(out, unit);
1421                                 continue;
1422                         } else if (mode == PrintCaml) {
1423                                 write_caml_decls(out, unit);
1424                                 continue;
1425                         } else if (mode == PrintJna) {
1426                                 write_jna_decls(out, unit);
1427                                 continue;
1428                         }
1429
1430                         /* build the firm graph */
1431                         ir_timer_t *t_construct = ir_timer_new();
1432                         timer_register(t_construct, "Frontend: Graph construction");
1433                         timer_push(t_construct);
1434                         if (already_constructed_firm) {
1435                                 panic("compiling multiple files/translation units not possible");
1436                         }
1437                         translation_unit_to_firm(unit);
1438                         already_constructed_firm = true;
1439                         timer_pop(t_construct);
1440
1441 graph_built:
1442                         if (mode == ParseOnly) {
1443                                 continue;
1444                         }
1445
1446                         if (mode == CompileDump) {
1447                                 /* find irg */
1448                                 ident    *id     = new_id_from_str(dumpfunction);
1449                                 ir_graph *irg    = NULL;
1450                                 int       n_irgs = get_irp_n_irgs();
1451                                 for (int i = 0; i < n_irgs; ++i) {
1452                                         ir_graph *tirg   = get_irp_irg(i);
1453                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1454                                         if (irg_id == id) {
1455                                                 irg = tirg;
1456                                                 break;
1457                                         }
1458                                 }
1459
1460                                 if (irg == NULL) {
1461                                         fprintf(stderr, "No graph for function '%s' found\n",
1462                                                 dumpfunction);
1463                                         exit(1);
1464                                 }
1465
1466                                 dump_ir_block_graph_file(irg, out);
1467                                 fclose(out);
1468                                 exit(0);
1469                         }
1470
1471                         if (mode == CompileExportIR) {
1472                                 fclose(out);
1473                                 ir_export(outname);
1474                                 exit(0);
1475                         }
1476
1477                         gen_firm_finish(asm_out, filename, /*c_mode=*/1,
1478                                         have_const_functions);
1479                         if (asm_out != out) {
1480                                 fclose(asm_out);
1481                         }
1482                 } else if (filetype == FILETYPE_IR) {
1483                         fclose(in);
1484                         ir_import(filename);
1485                         goto graph_built;
1486                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1487                         copy_file(asm_out, in);
1488                         if (in == preprocessed_in) {
1489                                 int pp_result = pclose(preprocessed_in);
1490                                 if (pp_result != EXIT_SUCCESS) {
1491                                         /* remove output in error case */
1492                                         if (out != stdout)
1493                                                 unlink(outname);
1494                                         return pp_result;
1495                                 }
1496                         }
1497                         if (asm_out != out) {
1498                                 fclose(asm_out);
1499                         }
1500                 }
1501
1502                 if (mode == Compile)
1503                         continue;
1504
1505                 /* if we're here then we have preprocessed assembly */
1506                 filename = asm_tempfile;
1507                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1508
1509                 /* assemble */
1510                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1511                         char        temp[1024];
1512                         const char *filename_o;
1513                         if (mode == CompileAssemble) {
1514                                 fclose(out);
1515                                 filename_o = outname;
1516                         } else {
1517                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1518                                 fclose(tempf);
1519                                 filename_o = temp;
1520                         }
1521
1522                         assemble(filename_o, filename);
1523
1524                         size_t len = strlen(filename_o) + 1;
1525                         filename = obstack_copy(&file_obst, filename_o, len);
1526                         filetype = FILETYPE_OBJECT;
1527                 }
1528
1529                 /* ok we're done here, process next file */
1530                 file->name = filename;
1531                 file->type = filetype;
1532         }
1533
1534         if (result != EXIT_SUCCESS) {
1535                 if (out != stdout)
1536                         unlink(outname);
1537                 return result;
1538         }
1539
1540         /* link program file */
1541         if (mode == CompileAssembleLink) {
1542                 obstack_1grow(&ldflags_obst, '\0');
1543                 const char *flags = obstack_finish(&ldflags_obst);
1544
1545                 /* construct commandline */
1546                 const char *linker = getenv("CPARSER_LINK");
1547                 if (linker == NULL)
1548                         linker = LINKER;
1549                 obstack_printf(&file_obst, "%s", linker);
1550                 for (file_list_entry_t *entry = files; entry != NULL;
1551                                 entry = entry->next) {
1552                         if (entry->type != FILETYPE_OBJECT)
1553                                 continue;
1554
1555                         add_flag(&file_obst, "%s", entry->name);
1556                 }
1557
1558                 add_flag(&file_obst, "-o");
1559                 add_flag(&file_obst, outname);
1560                 obstack_printf(&file_obst, "%s", flags);
1561                 obstack_1grow(&file_obst, '\0');
1562
1563                 char *commandline = obstack_finish(&file_obst);
1564
1565                 if (verbose) {
1566                         puts(commandline);
1567                 }
1568                 int err = system(commandline);
1569                 if (err != EXIT_SUCCESS) {
1570                         fprintf(stderr, "linker reported an error\n");
1571                         exit(1);
1572                 }
1573         }
1574
1575         if (do_timing)
1576                 timer_term(stderr);
1577
1578         obstack_free(&cppflags_obst, NULL);
1579         obstack_free(&ldflags_obst, NULL);
1580         obstack_free(&file_obst, NULL);
1581
1582         exit_mangle();
1583         exit_ast2firm();
1584         exit_parser();
1585         exit_ast();
1586         exit_lexer();
1587         exit_typehash();
1588         exit_types();
1589         exit_tokens();
1590         exit_symbol_table();
1591         return 0;
1592 }