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
 177 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 178                             const char *newext)
 179 {
 180         if (inputname == NULL)
 181                 inputname = "a";
 182
 183         char const *const last_slash = strrchr(inputname, '/');
 184         char const *const filename   =
 185                 last_slash != NULL ? last_slash + 1 : inputname;
 186         char const *const last_dot   = strrchr(filename, '.');
 187         char const *const name_end   =
 188                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 189
 190         int const len = snprintf(buf, buflen, "%.*s%s",
 191                         (int)(name_end - filename), filename, newext);
 192 #ifdef _WIN32
 193         if (len < 0 || buflen <= (size_t)len)
 194 #else
 195         if (buflen <= (size_t)len)
 196 #endif
 197                 panic("filename too long");
 198 }
 199
 200 #include "gen_builtins.h"
 201
 202 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 203 {
 204         start_parsing();
 205
 206         if (use_builtins) {
 207                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 208                 parse();
 209         }
 210
 211         lexer_open_stream(in, input_name);
 212         parse();
 213
 214         translation_unit_t *unit = finish_parsing();
 215         return unit;
 216 }
 217
 218 static void lextest(FILE *in, const char *fname)
 219 {
 220         lexer_open_stream(in, fname);
 221
 222         do {
 223                 lexer_next_preprocessing_token();
 224                 print_token(stdout, &lexer_token);
 225                 putchar('\n');
 226         } while (lexer_token.type != T_EOF);
 227 }
 228
 229 static void add_flag(struct obstack *obst, const char *format, ...)
 230 {
 231         char buf[65536];
 232         va_list ap;
 233
 234         va_start(ap, format);
 235 #ifdef _WIN32
 236         int len =
 237 #endif
 238                 vsnprintf(buf, sizeof(buf), format, ap);
 239         va_end(ap);
 240
 241         obstack_1grow(obst, ' ');
 242 #ifdef _WIN32
 243         obstack_1grow(obst, '"');
 244         obstack_grow(obst, buf, len);
 245         obstack_1grow(obst, '"');
 246 #else
 247         /* escape stuff... */
 248         for (char *c = buf; *c != '\0'; ++c) {
 249                 switch(*c) {
 250                 case ' ':
 251                 case '"':
 252                 case '$':
 253                 case '&':
 254                 case '(':
 255                 case ')':
 256                 case ';':
 257                 case '<':
 258                 case '>':
 259                 case '\'':
 260                 case '\\':
 261                 case '\n':
 262                 case '\r':
 263                 case '\t':
 264                 case '`':
 265                 case '|':
 266                         obstack_1grow(obst, '\\');
 267                         /* FALLTHROUGH */
 268                 default:
 269                         obstack_1grow(obst, *c);
 270                         break;
 271                 }
 272         }
 273 #endif
 274 }
 275
 276 static const char *type_to_string(type_t *type)
 277 {
 278         assert(type->kind == TYPE_ATOMIC);
 279         return get_atomic_kind_name(type->atomic.akind);
 280 }
 281
 282 static FILE *preprocess(const char *fname, filetype_t filetype)
 283 {
 284         static const char *common_flags = NULL;
 285
 286         if (common_flags == NULL) {
 287                 obstack_1grow(&cppflags_obst, '\0');
 288                 const char *flags = obstack_finish(&cppflags_obst);
 289
 290                 /* setup default defines */
 291                 add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 292                 add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 293                 add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 294                 add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 295
 296                 add_flag(&cppflags_obst, "-U__VERSION__");
 297                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 298
 299                 if (flags[0] != '\0') {
 300                         size_t len = strlen(flags);
 301                         obstack_1grow(&cppflags_obst, ' ');
 302                         obstack_grow(&cppflags_obst, flags, len);
 303                 }
 304                 obstack_1grow(&cppflags_obst, '\0');
 305                 common_flags = obstack_finish(&cppflags_obst);
 306         }
 307
 308         assert(obstack_object_size(&cppflags_obst) == 0);
 309
 310         const char *preprocessor = getenv("CPARSER_PP");
 311         if (preprocessor == NULL)
 312                 preprocessor = PREPROCESSOR;
 313
 314         obstack_printf(&cppflags_obst, "%s ", preprocessor);
 315         switch (filetype) {
 316         case FILETYPE_C:
 317                 add_flag(&cppflags_obst, "-std=c99");
 318                 break;
 319         case FILETYPE_CXX:
 320                 add_flag(&cppflags_obst, "-std=c++98");
 321                 break;
 322         case FILETYPE_ASSEMBLER:
 323                 add_flag(&cppflags_obst, "-x");
 324                 add_flag(&cppflags_obst, "assembler-with-cpp");
 325                 break;
 326         default:
 327                 break;
 328         }
 329         obstack_printf(&cppflags_obst, "%s", common_flags);
 330
 331         /* handle dependency generation */
 332         if (dep_target[0] != '\0') {
 333                 add_flag(&cppflags_obst, "-MF");
 334                 add_flag(&cppflags_obst, dep_target);
 335                 if (outname != NULL) {
 336                                 add_flag(&cppflags_obst, "-MQ");
 337                                 add_flag(&cppflags_obst, outname);
 338                 }
 339         }
 340         add_flag(&cppflags_obst, fname);
 341
 342         obstack_1grow(&cppflags_obst, '\0');
 343         char *buf = obstack_finish(&cppflags_obst);
 344         if (verbose) {
 345                 puts(buf);
 346         }
 347
 348         FILE *f = popen(buf, "r");
 349         if (f == NULL) {
 350                 fprintf(stderr, "invoking preprocessor failed\n");
 351                 exit(1);
 352         }
 353
 354         /* we don't really need that anymore */
 355         obstack_free(&cppflags_obst, buf);
 356
 357         return f;
 358 }
 359
 360 static void assemble(const char *out, const char *in)
 361 {
 362         char buf[65536];
 363
 364         const char *assembler = getenv("CPARSER_AS");
 365         if (assembler == NULL)
 366                 assembler = ASSEMBLER;
 367
 368         snprintf(buf, sizeof(buf), "%s %s -o %s", assembler, in, out);
 369         if (verbose) {
 370                 puts(buf);
 371         }
 372
 373         int err = system(buf);
 374         if (err != 0) {
 375                 fprintf(stderr, "assembler reported an error\n");
 376                 exit(1);
 377         }
 378 }
 379
 380 static void print_file_name(const char *file)
 381 {
 382         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 383
 384         obstack_1grow(&ldflags_obst, '\0');
 385         const char *flags = obstack_finish(&ldflags_obst);
 386
 387         /* construct commandline */
 388         const char *linker = getenv("CPARSER_LINK");
 389         if (linker == NULL)
 390                 linker = LINKER;
 391         obstack_printf(&ldflags_obst, "%s ", linker);
 392         obstack_printf(&ldflags_obst, "%s", flags);
 393         obstack_1grow(&ldflags_obst, '\0');
 394
 395         char *commandline = obstack_finish(&ldflags_obst);
 396
 397         if (verbose) {
 398                 puts(commandline);
 399         }
 400         int err = system(commandline);
 401         if (err != EXIT_SUCCESS) {
 402                 fprintf(stderr, "linker reported an error\n");
 403                 exit(1);
 404         }
 405 }
 406
 407 static const char *try_dir(const char *dir)
 408 {
 409         if (dir == NULL)
 410                 return dir;
 411         if (access(dir, R_OK | W_OK | X_OK) == 0)
 412                 return dir;
 413         return NULL;
 414 }
 415
 416 static const char *get_tempdir(void)
 417 {
 418         static const char *tmpdir = NULL;
 419
 420         if (tmpdir != NULL)
 421                 return tmpdir;
 422
 423         if (tmpdir == NULL)
 424                 tmpdir = try_dir(getenv("TMPDIR"));
 425         if (tmpdir == NULL)
 426                 tmpdir = try_dir(getenv("TMP"));
 427         if (tmpdir == NULL)
 428                 tmpdir = try_dir(getenv("TEMP"));
 429
 430 #ifdef P_tmpdir
 431         if (tmpdir == NULL)
 432                 tmpdir = try_dir(P_tmpdir);
 433 #endif
 434
 435         if (tmpdir == NULL)
 436                 tmpdir = try_dir("/var/tmp");
 437         if (tmpdir == NULL)
 438                 tmpdir = try_dir("/usr/tmp");
 439         if (tmpdir == NULL)
 440                 tmpdir = try_dir("/tmp");
 441
 442         if (tmpdir == NULL)
 443                 tmpdir = ".";
 444
 445         return tmpdir;
 446 }
 447
 448 #ifndef HAVE_MKSTEMP
 449 /* cheap and nasty mkstemp replacement */
 450 static int mkstemp(char *templ)
 451 {
 452         mktemp(templ);
 453         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 454 }
 455 #endif
 456
 457 /**
 458  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 459  * during linking (like glibc/gnu ld do for tmpnam)...
 460  */
 461 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 462 {
 463         const char *tempdir = get_tempdir();
 464
 465         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 466
 467         int fd = mkstemp(buffer);
 468         if (fd == -1) {
 469                 fprintf(stderr, "couldn't create temporary file: %s\n",
 470                         strerror(errno));
 471                 exit(1);
 472         }
 473         FILE *out = fdopen(fd, "w");
 474         if (out == NULL) {
 475                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 476                 exit(1);
 477         }
 478
 479         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 480         memset(entry, 0, sizeof(*entry));
 481
 482         size_t  name_len = strlen(buffer) + 1;
 483         char   *name     = malloc(name_len);
 484         memcpy(name, buffer, name_len);
 485         entry->name      = name;
 486
 487         entry->next = temp_files;
 488         temp_files  = entry;
 489
 490         return out;
 491 }
 492
 493 static void free_temp_files(void)
 494 {
 495         file_list_entry_t *entry = temp_files;
 496         file_list_entry_t *next;
 497         for ( ; entry != NULL; entry = next) {
 498                 next = entry->next;
 499
 500                 unlink(entry->name);
 501                 free((char*) entry->name);
 502                 free(entry);
 503         }
 504         temp_files = NULL;
 505 }
 506
 507 /**
 508  * Do the necessary lowering for compound parameters.
 509  */
 510 void lower_compound_params(void)
 511 {
 512         lower_params_t params;
 513
 514         params.def_ptr_alignment    = 4;
 515         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 516         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 517         params.find_pointer_type    = NULL;
 518         params.ret_compound_in_regs = NULL;
 519         lower_calls_with_compounds(&params);
 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(1);
 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 static void init_os_support(void)
 647 {
 648         /* OS option must be set to the backend */
 649         switch (firm_opt.os_support) {
 650         case OS_SUPPORT_MINGW:
 651                 set_be_option("ia32-gasmode=mingw");
 652                 wchar_atomic_kind = ATOMIC_TYPE_USHORT;
 653                 break;
 654         case OS_SUPPORT_LINUX:
 655                 set_be_option("ia32-gasmode=elf");
 656                 break;
 657         case OS_SUPPORT_MACHO:
 658                 set_be_option("ia32-gasmode=macho");
 659                 set_be_option("ia32-stackalign=4");
 660                 set_be_option("pic");
 661                 break;
 662         }
 663 }
 664
 665 int main(int argc, char **argv)
 666 {
 667         initialize_firm();
 668
 669         const char        *dumpfunction         = NULL;
 670         const char        *print_file_name_file = NULL;
 671         compile_mode_t     mode                 = CompileAssembleLink;
 672         int                opt_level            = 1;
 673         int                result               = EXIT_SUCCESS;
 674         char               cpu_arch[16]         = "ia32";
 675         file_list_entry_t *files                = NULL;
 676         file_list_entry_t *last_file            = NULL;
 677         bool               construct_dep_target = false;
 678         bool               do_timing            = false;
 679         struct obstack     file_obst;
 680
 681         atexit(free_temp_files);
 682
 683         /* hack for now... */
 684         if (strstr(argv[0], "pptest") != NULL) {
 685                 extern int pptest_main(int argc, char **argv);
 686                 return pptest_main(argc, argv);
 687         }
 688
 689         obstack_init(&cppflags_obst);
 690         obstack_init(&ldflags_obst);
 691         obstack_init(&file_obst);
 692
 693 #define GET_ARG_AFTER(def, args)                                             \
 694         def = &arg[sizeof(args)-1];                                              \
 695         if (def[0] == '\0') {                                                     \
 696                 ++i;                                                                 \
 697                 if (i >= argc) {                                                      \
 698                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 699                         argument_errors = true;                                          \
 700                         break;                                                           \
 701                 }                                                                    \
 702                 def = argv[i];                                                       \
 703                 if (def[0] == '-' && def[1] != '\0') {                                \
 704                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 705                         argument_errors = true;                                          \
 706                         continue;                                                        \
 707                 }                                                                    \
 708         }
 709
 710 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 711
 712         /* early options parsing (find out optimisation level and OS) */
 713         for (int i = 1; i < argc; ++i) {
 714                 const char *arg = argv[i];
 715                 if (arg[0] != '-')
 716                         continue;
 717
 718                 const char *option = &arg[1];
 719                 if (option[0] == 'O') {
 720                         sscanf(&option[1], "%d", &opt_level);
 721                 }
 722                 if (strcmp(arg, "-fwin32") == 0) {
 723                         firm_opt.os_support = OS_SUPPORT_MINGW;
 724                 } else if (strcmp(arg, "-fmac") == 0) {
 725                         firm_opt.os_support = OS_SUPPORT_MACHO;
 726                 } else if (strcmp(arg, "-flinux") == 0) {
 727                         firm_opt.os_support = OS_SUPPORT_LINUX;
 728                 }
 729         }
 730
 731         /* set target/os specific stuff */
 732         init_os_support();
 733
 734         /* apply optimisation level */
 735         switch(opt_level) {
 736         case 0:
 737                 set_option("no-opt");
 738                 break;
 739         case 1:
 740                 set_option("no-inline");
 741                 break;
 742         default:
 743         case 4:
 744                 /* use_builtins = true; */
 745                 /* fallthrough */
 746         case 3:
 747                 set_option("thread-jumps");
 748                 set_option("if-conversion");
 749                 /* fallthrough */
 750         case 2:
 751                 set_option("strict-aliasing");
 752                 set_option("inline");
 753                 set_option("deconv");
 754                 set_be_option("omitfp");
 755                 break;
 756         }
 757
 758         /* parse rest of options */
 759         standard                        = STANDARD_DEFAULT;
 760         unsigned        features_on     = 0;
 761         unsigned        features_off    = 0;
 762         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 763         bool            help_displayed  = false;
 764         bool            argument_errors = false;
 765         for (int i = 1; i < argc; ++i) {
 766                 const char *arg = argv[i];
 767                 if (arg[0] == '-' && arg[1] != '\0') {
 768                         /* an option */
 769                         const char *option = &arg[1];
 770                         if (option[0] == 'o') {
 771                                 GET_ARG_AFTER(outname, "-o");
 772                         } else if (option[0] == 'g') {
 773                                 set_be_option("debuginfo=stabs");
 774                                 set_be_option("omitfp=no");
 775                                 set_be_option("ia32-nooptcc=yes");
 776                         } else if (SINGLE_OPTION('c')) {
 777                                 mode = CompileAssemble;
 778                         } else if (SINGLE_OPTION('E')) {
 779                                 mode = PreprocessOnly;
 780                         } else if (SINGLE_OPTION('S')) {
 781                                 mode = Compile;
 782                         } else if (option[0] == 'O') {
 783                                 continue;
 784                         } else if (option[0] == 'I') {
 785                                 const char *opt;
 786                                 GET_ARG_AFTER(opt, "-I");
 787                                 add_flag(&cppflags_obst, "-I%s", opt);
 788                         } else if (option[0] == 'D') {
 789                                 const char *opt;
 790                                 GET_ARG_AFTER(opt, "-D");
 791                                 add_flag(&cppflags_obst, "-D%s", opt);
 792                         } else if (option[0] == 'U') {
 793                                 const char *opt;
 794                                 GET_ARG_AFTER(opt, "-U");
 795                                 add_flag(&cppflags_obst, "-U%s", opt);
 796                         } else if (option[0] == 'l') {
 797                                 const char *opt;
 798                                 GET_ARG_AFTER(opt, "-l");
 799                                 add_flag(&ldflags_obst, "-l%s", opt);
 800                         } else if (option[0] == 'L') {
 801                                 const char *opt;
 802                                 GET_ARG_AFTER(opt, "-L");
 803                                 add_flag(&ldflags_obst, "-L%s", opt);
 804                         } else if (SINGLE_OPTION('v')) {
 805                                 verbose = 1;
 806                         } else if (SINGLE_OPTION('w')) {
 807                                 memset(&warning, 0, sizeof(warning));
 808                         } else if (option[0] == 'x') {
 809                                 const char *opt;
 810                                 GET_ARG_AFTER(opt, "-x");
 811                                 forced_filetype = get_filetype_from_string(opt);
 812                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 813                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 814                                         argument_errors = true;
 815                                 }
 816                         } else if (streq(option, "M")) {
 817                                 mode = PreprocessOnly;
 818                                 add_flag(&cppflags_obst, "-M");
 819                         } else if (streq(option, "MMD") ||
 820                                    streq(option, "MD")) {
 821                             construct_dep_target = true;
 822                                 add_flag(&cppflags_obst, "-%s", option);
 823                         } else if (streq(option, "MM")  ||
 824                                    streq(option, "MP")) {
 825                                 add_flag(&cppflags_obst, "-%s", option);
 826                         } else if (streq(option, "MT") ||
 827                                    streq(option, "MQ") ||
 828                                    streq(option, "MF")) {
 829                                 const char *opt;
 830                                 GET_ARG_AFTER(opt, "-MT");
 831                                 add_flag(&cppflags_obst, "-%s", option);
 832                                 add_flag(&cppflags_obst, "%s", opt);
 833                         } else if (streq(option, "include")) {
 834                                 const char *opt;
 835                                 GET_ARG_AFTER(opt, "-include");
 836                                 add_flag(&cppflags_obst, "-include");
 837                                 add_flag(&cppflags_obst, "%s", opt);
 838                         } else if (streq(option, "isystem")) {
 839                                 const char *opt;
 840                                 GET_ARG_AFTER(opt, "-isystem");
 841                                 add_flag(&cppflags_obst, "-isystem");
 842                                 add_flag(&cppflags_obst, "%s", opt);
 843                         } else if (streq(option, "nostdinc")
 844                                         || streq(option, "trigraphs")) {
 845                                 /* pass these through to the preprocessor */
 846                                 add_flag(&cppflags_obst, "%s", arg);
 847                         } else if (streq(option, "pipe")) {
 848                                 /* here for gcc compatibility */
 849                         } else if (option[0] == 'f') {
 850                                 char const *orig_opt;
 851                                 GET_ARG_AFTER(orig_opt, "-f");
 852
 853                                 if (strstart(orig_opt, "input-charset=")) {
 854                                         char const* const encoding = strchr(orig_opt, '=') + 1;
 855                                         select_input_encoding(encoding);
 856                                 } else if (streq(orig_opt, "verbose-asm")) {
 857                                         /* ignore: we always print verbose assembler */
 858                                 } else {
 859                                         char const *opt         = orig_opt;
 860                                         bool        truth_value = true;
 861                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 862                                                 truth_value = false;
 863                                                 opt += 3;
 864                                         }
 865
 866                                         if (streq(opt, "builtins")) {
 867                                                 use_builtins = truth_value;
 868                                         } else if (streq(opt, "dollars-in-identifiers")) {
 869                                                 allow_dollar_in_symbol = truth_value;
 870                                         } else if (streq(opt, "omit-frame-pointer")) {
 871                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 872                                         } else if (streq(opt, "short-wchar")) {
 873                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 874                                                         : ATOMIC_TYPE_INT;
 875                                         } else if (streq(opt, "signed-char")) {
 876                                                 char_is_signed = truth_value;
 877                                         } else if (streq(opt, "strength-reduce")) {
 878                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 879                                         } else if (streq(opt, "syntax-only")) {
 880                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 881                                         } else if (streq(opt, "unsigned-char")) {
 882                                                 char_is_signed = !truth_value;
 883                                         } else if (truth_value == false &&
 884                                                    streq(opt, "asynchronous-unwind-tables")) {
 885                                             /* nothing todo, a gcc feature which we don't support
 886                                              * anyway was deactivated */
 887                                         } else if (strstart(orig_opt, "align-loops=") ||
 888                                                         strstart(orig_opt, "align-jumps=") ||
 889                                                         strstart(orig_opt, "align-functions=")) {
 890                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 891                                         } else if (strstart(orig_opt, "message-length=")) {
 892                                                         /* ignore: would only affect error message format */
 893                                         } else if (streq(opt, "fast-math")               ||
 894                                                    streq(opt, "jump-tables")             ||
 895                                                    streq(opt, "expensive-optimizations") ||
 896                                                    streq(opt, "common")                  ||
 897                                                    streq(opt, "optimize-sibling-calls")  ||
 898                                                    streq(opt, "align-loops")             ||
 899                                                    streq(opt, "align-jumps")             ||
 900                                                    streq(opt, "align-functions")         ||
 901                                                    streq(opt, "PIC")) {
 902                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 903                                         } else {
 904                                                 int res = firm_option(orig_opt);
 905                                                 if (res == 0) {
 906                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
 907                                                                 orig_opt);
 908                                                         argument_errors = true;
 909                                                         continue;
 910                                                 } else if (res == -1) {
 911                                                         help_displayed = true;
 912                                                 }
 913                                         }
 914                                 }
 915                         } else if (option[0] == 'b') {
 916                                 const char *opt;
 917                                 GET_ARG_AFTER(opt, "-b");
 918                                 int res = be_parse_arg(opt);
 919                                 if (res == 0) {
 920                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
 921                                                 opt);
 922                                         argument_errors = true;
 923                                 } else if (res == -1) {
 924                                         help_displayed = true;
 925                                 } else if (strstart(opt, "isa=")) {
 926                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
 927                                 }
 928                         } else if (option[0] == 'W') {
 929                                 if (option[1] == '\0') {
 930                                         /* ignore -W, out defaults are already quiet verbose */
 931                                 } else if (strstart(option + 1, "p,")) {
 932                                         // pass options directly to the preprocessor
 933                                         const char *opt;
 934                                         GET_ARG_AFTER(opt, "-Wp,");
 935                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
 936                                 } else if (strstart(option + 1, "l,")) {
 937                                         // pass options directly to the linker
 938                                         const char *opt;
 939                                         GET_ARG_AFTER(opt, "-Wl,");
 940                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
 941                                 } else if (streq(option + 1, "no-trigraphs")
 942                                                         || streq(option + 1, "undef")) {
 943                                         add_flag(&cppflags_obst, "%s", arg);
 944                                 } else {
 945                                         set_warning_opt(&option[1]);
 946                                 }
 947                         } else if (option[0] == 'm') {
 948                                 /* -m options */
 949                                 const char *opt;
 950                                 char arch_opt[64];
 951
 952                                 GET_ARG_AFTER(opt, "-m");
 953                                 if (strstart(opt, "arch=")) {
 954                                         GET_ARG_AFTER(opt, "-march=");
 955                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 956                                         int res = be_parse_arg(arch_opt);
 957                                         if (res == 0) {
 958                                                 fprintf(stderr, "Unknown architecture '%s'\n", arch_opt);
 959                                                 argument_errors = true;
 960                                         } else {
 961                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 962                                                 int res = be_parse_arg(arch_opt);
 963                                                 if (res == 0)
 964                                                         argument_errors = true;
 965                                         }
 966                                 } else if (strstart(opt, "tune=")) {
 967                                         GET_ARG_AFTER(opt, "-mtune=");
 968                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
 969                                         int res = be_parse_arg(arch_opt);
 970                                         if (res == 0)
 971                                                 argument_errors = true;
 972                                 } else if (strstart(opt, "cpu=")) {
 973                                         GET_ARG_AFTER(opt, "-mcpu=");
 974                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
 975                                         int res = be_parse_arg(arch_opt);
 976                                         if (res == 0)
 977                                                 argument_errors = true;
 978                                 } else if (strstart(opt, "fpmath=")) {
 979                                         GET_ARG_AFTER(opt, "-mfpmath=");
 980                                         if (streq(opt, "387"))
 981                                                 opt = "x87";
 982                                         else if (streq(opt, "sse"))
 983                                                 opt = "sse2";
 984                                         else {
 985                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
 986                                                 argument_errors = true;
 987                                         }
 988                                         if (!argument_errors) {
 989                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
 990                                                 int res = be_parse_arg(arch_opt);
 991                                                 if (res == 0)
 992                                                         argument_errors = true;
 993                                         }
 994                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
 995                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
 996                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
 997                                         int res = be_parse_arg(arch_opt);
 998                                         if (res == 0)
 999                                                 argument_errors = true;
1000                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
1001                                         set_be_option("omitleaffp=1");
1002                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
1003                                         set_be_option("omitleaffp=0");
1004                                 } else if (streq(opt, "rtd")) {
1005                                         default_calling_convention = CC_STDCALL;
1006                                 } else if (strstart(opt, "regparm=")) {
1007                                         fprintf(stderr, "error: regparm convention not supported yet\n");
1008                                         argument_errors = true;
1009                                 } else if (streq(opt, "soft-float")) {
1010                                         fprintf(stderr, "error: software floatingpoint not supported yet\n");
1011                                         argument_errors = true;
1012                                 } else {
1013                                         char *endptr;
1014                                         long int value = strtol(opt, &endptr, 10);
1015                                         if (*endptr != '\0') {
1016                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
1017                                                 argument_errors = true;
1018                                         }
1019                                         if (value != 16 && value != 32 && value != 64) {
1020                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
1021                                                 argument_errors = true;
1022                                         } else {
1023                                                 machine_size = (unsigned int)value;
1024                                         }
1025                                 }
1026                         } else if (streq(option, "pg")) {
1027                                 set_be_option("gprof");
1028                                 add_flag(&ldflags_obst, "-pg");
1029                         } else if (streq(option, "pedantic") ||
1030                                    streq(option, "ansi")) {
1031                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1032                         } else if (streq(option, "shared")) {
1033                                 add_flag(&ldflags_obst, "-shared");
1034                         } else if (strstart(option, "std=")) {
1035                                 const char *const o = &option[4];
1036                                 standard =
1037                                         streq(o, "c++")            ? STANDARD_CXX98   :
1038                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1039                                         streq(o, "c89")            ? STANDARD_C89     :
1040                                         streq(o, "c99")            ? STANDARD_C99     :
1041                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1042                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1043                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1044                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1045                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1046                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1047                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1048                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1049                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1050                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1051                         } else if (streq(option, "version")) {
1052                                 print_cparser_version();
1053                         } else if (strstart(option, "print-file-name=")) {
1054                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1055                         } else if (option[0] == '-') {
1056                                 /* double dash option */
1057                                 ++option;
1058                                 if (streq(option, "gcc")) {
1059                                         features_on  |=  _GNUC;
1060                                         features_off &= ~_GNUC;
1061                                 } else if (streq(option, "no-gcc")) {
1062                                         features_on  &= ~_GNUC;
1063                                         features_off |=  _GNUC;
1064                                 } else if (streq(option, "ms")) {
1065                                         features_on  |=  _MS;
1066                                         features_off &= ~_MS;
1067                                 } else if (streq(option, "no-ms")) {
1068                                         features_on  &= ~_MS;
1069                                         features_off |=  _MS;
1070                                 } else if (streq(option, "strict")) {
1071                                         strict_mode = true;
1072                                 } else if (streq(option, "lextest")) {
1073                                         mode = LexTest;
1074                                 } else if (streq(option, "benchmark")) {
1075                                         mode = BenchmarkParser;
1076                                 } else if (streq(option, "print-ast")) {
1077                                         mode = PrintAst;
1078                                 } else if (streq(option, "print-implicit-cast")) {
1079                                         print_implicit_casts = true;
1080                                 } else if (streq(option, "print-parenthesis")) {
1081                                         print_parenthesis = true;
1082                                 } else if (streq(option, "print-fluffy")) {
1083                                         mode = PrintFluffy;
1084                                 } else if (streq(option, "print-caml")) {
1085                                         mode = PrintCaml;
1086                                 } else if (streq(option, "print-jna")) {
1087                                         mode = PrintJna;
1088                                 } else if (streq(option, "time")) {
1089                                         do_timing = true;
1090                                 } else if (streq(option, "version")) {
1091                                         print_cparser_version();
1092                                         exit(EXIT_SUCCESS);
1093                                 } else if (streq(option, "help")) {
1094                                         print_help(argv[0]);
1095                                         help_displayed = true;
1096                                 } else if (streq(option, "dump-function")) {
1097                                         ++i;
1098                                         if (i >= argc) {
1099                                                 fprintf(stderr, "error: "
1100                                                         "expected argument after '--dump-function'\n");
1101                                                 argument_errors = true;
1102                                                 break;
1103                                         }
1104                                         dumpfunction = argv[i];
1105                                         mode         = CompileDump;
1106                                 } else if (streq(option, "export-ir")) {
1107                                         mode = CompileExportIR;
1108                                 } else {
1109                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1110                                         argument_errors = true;
1111                                 }
1112                         } else {
1113                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1114                                 argument_errors = true;
1115                         }
1116                 } else {
1117                         filetype_t type = forced_filetype;
1118                         if (type == FILETYPE_AUTODETECT) {
1119                                 if (streq(arg, "-")) {
1120                                         /* - implicitly means C source file */
1121                                         type = FILETYPE_C;
1122                                 } else {
1123                                         const char *suffix = strrchr(arg, '.');
1124                                         /* Ensure there is at least one char before the suffix */
1125                                         if (suffix != NULL && suffix != arg) {
1126                                                 ++suffix;
1127                                                 type =
1128                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1129                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1130                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1131                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1132                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1133                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1134                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1135                                                         streq(suffix, "ir")  ? FILETYPE_IR                     :
1136                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1137                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1138                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1139                                                         FILETYPE_AUTODETECT;
1140                                         }
1141                                 }
1142
1143                                 if (type == FILETYPE_AUTODETECT) {
1144                                         fprintf(stderr, "'%s': file format not recognized\n", arg);
1145                                         continue;
1146                                 }
1147                         }
1148
1149                         file_list_entry_t *entry
1150                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1151                         memset(entry, 0, sizeof(entry[0]));
1152                         entry->name = arg;
1153                         entry->type = type;
1154
1155                         if (last_file != NULL) {
1156                                 last_file->next = entry;
1157                         } else {
1158                                 files = entry;
1159                         }
1160                         last_file = entry;
1161                 }
1162         }
1163
1164         if (help_displayed) {
1165                 return !argument_errors;
1166         }
1167
1168         if (print_file_name_file != NULL) {
1169                 print_file_name(print_file_name_file);
1170                 return 0;
1171         }
1172         if (files == NULL) {
1173                 fprintf(stderr, "error: no input files specified\n");
1174                 argument_errors = true;
1175         }
1176
1177         if (argument_errors) {
1178                 usage(argv[0]);
1179                 return 1;
1180         }
1181
1182         /* we do the lowering in ast2firm */
1183         firm_opt.lower_bitfields = FALSE;
1184
1185         /* set the c_mode here, types depends on it */
1186         c_mode |= features_on;
1187         c_mode &= ~features_off;
1188
1189         gen_firm_init();
1190         init_symbol_table();
1191         init_types();
1192         init_typehash();
1193         init_basic_types();
1194         init_lexer();
1195         init_ast();
1196         init_parser();
1197         init_ast2firm();
1198         init_mangle();
1199
1200         if (do_timing)
1201                 timer_init();
1202
1203         if (construct_dep_target) {
1204                 if (outname != 0 && strlen(outname) >= 2) {
1205                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1206                 } else {
1207                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1208                 }
1209         } else {
1210                 dep_target[0] = '\0';
1211         }
1212
1213         char outnamebuf[4096];
1214         if (outname == NULL) {
1215                 const char *filename = files->name;
1216
1217                 switch(mode) {
1218                 case BenchmarkParser:
1219                 case PrintAst:
1220                 case PrintFluffy:
1221                 case PrintCaml:
1222                 case PrintJna:
1223                 case LexTest:
1224                 case PreprocessOnly:
1225                 case ParseOnly:
1226                         outname = "-";
1227                         break;
1228                 case Compile:
1229                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1230                         outname = outnamebuf;
1231                         break;
1232                 case CompileAssemble:
1233                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1234                         outname = outnamebuf;
1235                         break;
1236                 case CompileDump:
1237                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1238                                         ".vcg");
1239                         outname = outnamebuf;
1240                         break;
1241                 case CompileExportIR:
1242                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
1243                         outname = outnamebuf;
1244                         break;
1245                 case CompileAssembleLink:
1246 #ifdef _WIN32
1247                         outname = "a.exe";
1248 #else
1249                         outname = "a.out";
1250 #endif
1251                         break;
1252                 }
1253         }
1254
1255         assert(outname != NULL);
1256
1257         FILE *out;
1258         if (streq(outname, "-")) {
1259                 out = stdout;
1260         } else {
1261                 out = fopen(outname, "w");
1262                 if (out == NULL) {
1263                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1264                                         strerror(errno));
1265                         return 1;
1266                 }
1267         }
1268
1269         file_list_entry_t *file;
1270         bool               already_constructed_firm = false;
1271         for (file = files; file != NULL; file = file->next) {
1272                 char        asm_tempfile[1024];
1273                 const char *filename = file->name;
1274                 filetype_t  filetype = file->type;
1275
1276                 if (filetype == FILETYPE_OBJECT)
1277                         continue;
1278
1279                 FILE *in = NULL;
1280                 if (mode == LexTest) {
1281                         if (in == NULL)
1282                                 in = open_file(filename);
1283                         lextest(in, filename);
1284                         fclose(in);
1285                         exit(EXIT_SUCCESS);
1286                 }
1287
1288                 FILE *preprocessed_in = NULL;
1289                 filetype_t next_filetype = filetype;
1290                 switch (filetype) {
1291                         case FILETYPE_C:
1292                                 next_filetype = FILETYPE_PREPROCESSED_C;
1293                                 goto preprocess;
1294                         case FILETYPE_CXX:
1295                                 next_filetype = FILETYPE_PREPROCESSED_CXX;
1296                                 goto preprocess;
1297                         case FILETYPE_ASSEMBLER:
1298                                 next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1299                                 goto preprocess;
1300 preprocess:
1301                                 /* no support for input on FILE* yet */
1302                                 if (in != NULL)
1303                                         panic("internal compiler error: in for preprocessor != NULL");
1304
1305                                 preprocessed_in = preprocess(filename, filetype);
1306                                 if (mode == PreprocessOnly) {
1307                                         copy_file(out, preprocessed_in);
1308                                         int result = pclose(preprocessed_in);
1309                                         fclose(out);
1310                                         /* remove output file in case of error */
1311                                         if (out != stdout && result != EXIT_SUCCESS) {
1312                                                 unlink(outname);
1313                                         }
1314                                         return result;
1315                                 }
1316
1317                                 in = preprocessed_in;
1318                                 filetype = next_filetype;
1319                                 break;
1320
1321                         default:
1322                                 break;
1323                 }
1324
1325                 FILE *asm_out;
1326                 if (mode == Compile) {
1327                         asm_out = out;
1328                 } else {
1329                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1330                 }
1331
1332                 if (in == NULL)
1333                         in = open_file(filename);
1334
1335                 /* preprocess and compile */
1336                 if (filetype == FILETYPE_PREPROCESSED_C) {
1337                         char const* invalid_mode;
1338                         switch (standard) {
1339                                 case STANDARD_ANSI:
1340                                 case STANDARD_C89:   c_mode = _C89;                break;
1341                                 /* TODO determine difference between these two */
1342                                 case STANDARD_C90:   c_mode = _C89;                break;
1343                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1344                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1345
1346 default_c_warn:
1347                                         fprintf(stderr,
1348                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1349                                                         invalid_mode);
1350                                         /* FALLTHROUGH */
1351                                 case STANDARD_DEFAULT:
1352                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1353
1354                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1355                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1356                         }
1357                         goto do_parsing;
1358                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1359                         char const* invalid_mode;
1360                         switch (standard) {
1361                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1362                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1363                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1364                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1365                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1366
1367                                 case STANDARD_ANSI:
1368                                 case STANDARD_CXX98: c_mode = _CXX; break;
1369
1370 default_cxx_warn:
1371                                         fprintf(stderr,
1372                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1373                                                         invalid_mode);
1374                                 case STANDARD_DEFAULT:
1375                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1376                         }
1377
1378 do_parsing:
1379                         c_mode |= features_on;
1380                         c_mode &= ~features_off;
1381
1382                         /* do the actual parsing */
1383                         ir_timer_t *t_parsing = ir_timer_new();
1384                         timer_register(t_parsing, "Frontend: Parsing");
1385                         timer_push(t_parsing);
1386                         init_tokens();
1387                         translation_unit_t *const unit = do_parsing(in, filename);
1388                         timer_pop(t_parsing);
1389
1390                         /* prints the AST even if errors occurred */
1391                         if (mode == PrintAst) {
1392                                 print_to_file(out);
1393                                 print_ast(unit);
1394                         }
1395
1396                         if (error_count > 0) {
1397                                 /* parsing failed because of errors */
1398                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1399                                         warning_count);
1400                                 result = EXIT_FAILURE;
1401                                 continue;
1402                         } else if (warning_count > 0) {
1403                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1404                         }
1405
1406                         if (in == preprocessed_in) {
1407                                 int pp_result = pclose(preprocessed_in);
1408                                 if (pp_result != EXIT_SUCCESS) {
1409                                         /* remove output file */
1410                                         if (out != stdout)
1411                                                 unlink(outname);
1412                                         exit(EXIT_FAILURE);
1413                                 }
1414                         }
1415
1416                         if (mode == BenchmarkParser) {
1417                                 return result;
1418                         } else if (mode == PrintFluffy) {
1419                                 write_fluffy_decls(out, unit);
1420                                 continue;
1421                         } else if (mode == PrintCaml) {
1422                                 write_caml_decls(out, unit);
1423                                 continue;
1424                         } else if (mode == PrintJna) {
1425                                 write_jna_decls(out, unit);
1426                                 continue;
1427                         }
1428
1429                         /* build the firm graph */
1430                         ir_timer_t *t_construct = ir_timer_new();
1431                         timer_register(t_construct, "Frontend: Graph construction");
1432                         timer_push(t_construct);
1433                         if (already_constructed_firm) {
1434                                 panic("compiling multiple files/translation units not possible");
1435                         }
1436                         translation_unit_to_firm(unit);
1437                         already_constructed_firm = true;
1438                         timer_pop(t_construct);
1439
1440 graph_built:
1441                         if (mode == ParseOnly) {
1442                                 continue;
1443                         }
1444
1445                         if (mode == CompileDump) {
1446                                 /* find irg */
1447                                 ident    *id     = new_id_from_str(dumpfunction);
1448                                 ir_graph *irg    = NULL;
1449                                 int       n_irgs = get_irp_n_irgs();
1450                                 for (int i = 0; i < n_irgs; ++i) {
1451                                         ir_graph *tirg   = get_irp_irg(i);
1452                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1453                                         if (irg_id == id) {
1454                                                 irg = tirg;
1455                                                 break;
1456                                         }
1457                                 }
1458
1459                                 if (irg == NULL) {
1460                                         fprintf(stderr, "No graph for function '%s' found\n",
1461                                                 dumpfunction);
1462                                         exit(1);
1463                                 }
1464
1465                                 dump_ir_graph_file(out, irg);
1466                                 fclose(out);
1467                                 exit(0);
1468                         }
1469
1470                         if (mode == CompileExportIR) {
1471                                 fclose(out);
1472                                 ir_export(outname);
1473                                 exit(0);
1474                         }
1475
1476                         gen_firm_finish(asm_out, filename, have_const_functions);
1477                         if (asm_out != out) {
1478                                 fclose(asm_out);
1479                         }
1480                 } else if (filetype == FILETYPE_IR) {
1481                         fclose(in);
1482                         ir_import(filename);
1483                         goto graph_built;
1484                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1485                         copy_file(asm_out, in);
1486                         if (in == preprocessed_in) {
1487                                 int pp_result = pclose(preprocessed_in);
1488                                 if (pp_result != EXIT_SUCCESS) {
1489                                         /* remove output in error case */
1490                                         if (out != stdout)
1491                                                 unlink(outname);
1492                                         return pp_result;
1493                                 }
1494                         }
1495                         if (asm_out != out) {
1496                                 fclose(asm_out);
1497                         }
1498                 }
1499
1500                 if (mode == Compile)
1501                         continue;
1502
1503                 /* if we're here then we have preprocessed assembly */
1504                 filename = asm_tempfile;
1505                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1506
1507                 /* assemble */
1508                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1509                         char        temp[1024];
1510                         const char *filename_o;
1511                         if (mode == CompileAssemble) {
1512                                 fclose(out);
1513                                 filename_o = outname;
1514                         } else {
1515                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1516                                 fclose(tempf);
1517                                 filename_o = temp;
1518                         }
1519
1520                         assemble(filename_o, filename);
1521
1522                         size_t len = strlen(filename_o) + 1;
1523                         filename = obstack_copy(&file_obst, filename_o, len);
1524                         filetype = FILETYPE_OBJECT;
1525                 }
1526
1527                 /* ok we're done here, process next file */
1528                 file->name = filename;
1529                 file->type = filetype;
1530         }
1531
1532         if (result != EXIT_SUCCESS) {
1533                 if (out != stdout)
1534                         unlink(outname);
1535                 return result;
1536         }
1537
1538         /* link program file */
1539         if (mode == CompileAssembleLink) {
1540                 obstack_1grow(&ldflags_obst, '\0');
1541                 const char *flags = obstack_finish(&ldflags_obst);
1542
1543                 /* construct commandline */
1544                 const char *linker = getenv("CPARSER_LINK");
1545                 if (linker == NULL)
1546                         linker = LINKER;
1547                 obstack_printf(&file_obst, "%s", linker);
1548                 for (file_list_entry_t *entry = files; entry != NULL;
1549                                 entry = entry->next) {
1550                         if (entry->type != FILETYPE_OBJECT)
1551                                 continue;
1552
1553                         add_flag(&file_obst, "%s", entry->name);
1554                 }
1555
1556                 add_flag(&file_obst, "-o");
1557                 add_flag(&file_obst, outname);
1558                 obstack_printf(&file_obst, "%s", flags);
1559                 obstack_1grow(&file_obst, '\0');
1560
1561                 char *commandline = obstack_finish(&file_obst);
1562
1563                 if (verbose) {
1564                         puts(commandline);
1565                 }
1566                 int err = system(commandline);
1567                 if (err != EXIT_SUCCESS) {
1568                         fprintf(stderr, "linker reported an error\n");
1569                         exit(1);
1570                 }
1571         }
1572
1573         if (do_timing)
1574                 timer_term(stderr);
1575
1576         obstack_free(&cppflags_obst, NULL);
1577         obstack_free(&ldflags_obst, NULL);
1578         obstack_free(&file_obst, NULL);
1579
1580         exit_mangle();
1581         exit_ast2firm();
1582         exit_parser();
1583         exit_ast();
1584         exit_lexer();
1585         exit_typehash();
1586         exit_types();
1587         exit_tokens();
1588         exit_symbol_table();
1589         return 0;
1590 }