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_timing.h"
  74 #include "driver/firm_machine.h"
  75 #include "adt/error.h"
  76 #include "adt/strutil.h"
  77 #include "wrappergen/write_fluffy.h"
  78 #include "wrappergen/write_jna.h"
  79 #include "revision.h"
  80 #include "warning.h"
  81 #include "help.h"
  82 #include "mangle.h"
  83 #include "printer.h"
  84
  85 #ifndef PREPROCESSOR
  86 #ifndef __WIN32__
  87 #define PREPROCESSOR "gcc -E -U__STRICT_ANSI__"
  88 #else
  89 #define PREPROCESSOR "cpp -U__STRICT_ANSI__"
  90 #endif
  91 #endif
  92
  93 #ifndef LINKER
  94 #define LINKER    "gcc"
  95 #endif
  96
  97 #ifndef ASSEMBLER
  98 #define ASSEMBLER "gcc -c -xassembler"
  99 #endif
 100
 101 unsigned int        c_mode                    = _C89 | _ANSI | _C99 | _GNUC;
 102 bool                byte_order_big_endian     = false;
 103 bool                strict_mode               = false;
 104 bool                enable_main_collect2_hack = false;
 105 bool                freestanding              = false;
 106 unsigned            architecture_modulo_shift = 0;
 107
 108 static bool               char_is_signed      = true;
 109 static atomic_type_kind_t wchar_atomic_kind   = ATOMIC_TYPE_INT;
 110
 111 static machine_triple_t *target_machine;
 112 static const char       *target_triple;
 113 static int               verbose;
 114 static struct obstack    cppflags_obst;
 115 static struct obstack    ldflags_obst;
 116 static struct obstack    asflags_obst;
 117 static char              dep_target[1024];
 118 static const char       *outname;
 119 static bool              define_intmax_types;
 120 static const char       *input_encoding;
 121
 122 typedef enum lang_standard_t {
 123         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 124         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 125         STANDARD_C89,     /* ISO C90 (sic) */
 126         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 127         STANDARD_C99,     /* ISO C99 */
 128         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 129         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 130         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 131         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 132 } lang_standard_t;
 133
 134 static lang_standard_t standard;
 135
 136 typedef struct file_list_entry_t file_list_entry_t;
 137
 138 typedef enum filetype_t {
 139         FILETYPE_AUTODETECT,
 140         FILETYPE_C,
 141         FILETYPE_PREPROCESSED_C,
 142         FILETYPE_CXX,
 143         FILETYPE_PREPROCESSED_CXX,
 144         FILETYPE_ASSEMBLER,
 145         FILETYPE_PREPROCESSED_ASSEMBLER,
 146         FILETYPE_OBJECT,
 147         FILETYPE_IR,
 148         FILETYPE_UNKNOWN
 149 } filetype_t;
 150
 151 struct file_list_entry_t {
 152         const char  *name; /**< filename or NULL for stdin */
 153         filetype_t   type;
 154         file_list_entry_t *next;
 155 };
 156
 157 static file_list_entry_t *temp_files;
 158
 159 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 160                             const char *newext)
 161 {
 162         if (inputname == NULL)
 163                 inputname = "a";
 164
 165         char const *const last_slash = strrchr(inputname, '/');
 166         char const *const filename   =
 167                 last_slash != NULL ? last_slash + 1 : inputname;
 168         char const *const last_dot   = strrchr(filename, '.');
 169         char const *const name_end   =
 170                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 171
 172         int const len = snprintf(buf, buflen, "%.*s%s",
 173                         (int)(name_end - filename), filename, newext);
 174 #ifdef _WIN32
 175         if (len < 0 || buflen <= (size_t)len)
 176 #else
 177         if (buflen <= (size_t)len)
 178 #endif
 179                 panic("filename too long");
 180 }
 181
 182 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 183 {
 184         start_parsing();
 185
 186         input_t *input = input_from_stream(in, input_encoding);
 187         lexer_switch_input(input, input_name);
 188         parse();
 189         translation_unit_t *unit = finish_parsing();
 190         input_free(input);
 191
 192         return unit;
 193 }
 194
 195 static void lextest(FILE *in, const char *fname)
 196 {
 197         input_t *input = input_from_stream(in, input_encoding);
 198         lexer_switch_input(input, fname);
 199
 200         do {
 201                 lexer_next_preprocessing_token();
 202                 print_token(stdout, &lexer_token);
 203                 putchar('\n');
 204         } while (lexer_token.kind != T_EOF);
 205         input_free(input);
 206 }
 207
 208 static void add_flag(struct obstack *obst, const char *format, ...)
 209 {
 210         char buf[65536];
 211         va_list ap;
 212
 213         va_start(ap, format);
 214 #ifdef _WIN32
 215         int len =
 216 #endif
 217                 vsnprintf(buf, sizeof(buf), format, ap);
 218         va_end(ap);
 219
 220         obstack_1grow(obst, ' ');
 221 #ifdef _WIN32
 222         obstack_1grow(obst, '"');
 223         obstack_grow(obst, buf, len);
 224         obstack_1grow(obst, '"');
 225 #else
 226         /* escape stuff... */
 227         for (char *c = buf; *c != '\0'; ++c) {
 228                 switch(*c) {
 229                 case ' ':
 230                 case '"':
 231                 case '$':
 232                 case '&':
 233                 case '(':
 234                 case ')':
 235                 case ';':
 236                 case '<':
 237                 case '>':
 238                 case '\'':
 239                 case '\\':
 240                 case '\n':
 241                 case '\r':
 242                 case '\t':
 243                 case '`':
 244                 case '|':
 245                         obstack_1grow(obst, '\\');
 246                         /* FALLTHROUGH */
 247                 default:
 248                         obstack_1grow(obst, *c);
 249                         break;
 250                 }
 251         }
 252 #endif
 253 }
 254
 255 static const char *type_to_string(type_t *type)
 256 {
 257         assert(type->kind == TYPE_ATOMIC);
 258         return get_atomic_kind_name(type->atomic.akind);
 259 }
 260
 261 static FILE *preprocess(const char *fname, filetype_t filetype)
 262 {
 263         static const char *common_flags = NULL;
 264
 265         if (common_flags == NULL) {
 266                 obstack_1grow(&cppflags_obst, '\0');
 267                 const char *flags = obstack_finish(&cppflags_obst);
 268
 269                 /* setup default defines */
 270                 add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 271                 add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 272                 add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 273                 add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 274
 275                 add_flag(&cppflags_obst, "-U__VERSION__");
 276                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 277
 278                 if (define_intmax_types) {
 279                         add_flag(&cppflags_obst, "-U__INTMAX_TYPE__");
 280                         add_flag(&cppflags_obst, "-D__INTMAX_TYPE__=%s", type_to_string(type_intmax_t));
 281                         add_flag(&cppflags_obst, "-U__UINTMAX_TYPE__");
 282                         add_flag(&cppflags_obst, "-D__UINTMAX_TYPE__=%s", type_to_string(type_uintmax_t));
 283                 }
 284
 285                 if (flags[0] != '\0') {
 286                         size_t len = strlen(flags);
 287                         obstack_1grow(&cppflags_obst, ' ');
 288                         obstack_grow(&cppflags_obst, flags, len);
 289                 }
 290                 obstack_1grow(&cppflags_obst, '\0');
 291                 common_flags = obstack_finish(&cppflags_obst);
 292         }
 293
 294         assert(obstack_object_size(&cppflags_obst) == 0);
 295
 296         const char *preprocessor = getenv("CPARSER_PP");
 297         if (preprocessor != NULL) {
 298                 obstack_printf(&cppflags_obst, "%s ", preprocessor);
 299         } else {
 300                 if (target_triple != NULL)
 301                         obstack_printf(&cppflags_obst, "%s-", target_triple);
 302                 obstack_printf(&cppflags_obst, PREPROCESSOR);
 303         }
 304
 305         switch (filetype) {
 306         case FILETYPE_C:
 307                 add_flag(&cppflags_obst, "-std=c99");
 308                 break;
 309         case FILETYPE_CXX:
 310                 add_flag(&cppflags_obst, "-std=c++98");
 311                 break;
 312         case FILETYPE_ASSEMBLER:
 313                 add_flag(&cppflags_obst, "-x");
 314                 add_flag(&cppflags_obst, "assembler-with-cpp");
 315                 break;
 316         default:
 317                 break;
 318         }
 319         obstack_printf(&cppflags_obst, "%s", common_flags);
 320
 321         /* handle dependency generation */
 322         if (dep_target[0] != '\0') {
 323                 add_flag(&cppflags_obst, "-MF");
 324                 add_flag(&cppflags_obst, dep_target);
 325                 if (outname != NULL) {
 326                                 add_flag(&cppflags_obst, "-MQ");
 327                                 add_flag(&cppflags_obst, outname);
 328                 }
 329         }
 330         add_flag(&cppflags_obst, fname);
 331         obstack_1grow(&cppflags_obst, '\0');
 332
 333         char *commandline = obstack_finish(&cppflags_obst);
 334         if (verbose) {
 335                 puts(commandline);
 336         }
 337         FILE *f = popen(commandline, "r");
 338         if (f == NULL) {
 339                 fprintf(stderr, "invoking preprocessor failed\n");
 340                 exit(EXIT_FAILURE);
 341         }
 342         /* we do not really need that anymore */
 343         obstack_free(&cppflags_obst, commandline);
 344
 345         return f;
 346 }
 347
 348 static void assemble(const char *out, const char *in)
 349 {
 350         obstack_1grow(&asflags_obst, '\0');
 351         const char *flags = obstack_finish(&asflags_obst);
 352
 353         const char *assembler = getenv("CPARSER_AS");
 354         if (assembler != NULL) {
 355                 obstack_printf(&asflags_obst, "%s", assembler);
 356         } else {
 357                 if (target_triple != NULL)
 358                         obstack_printf(&asflags_obst, "%s-", target_triple);
 359                 obstack_printf(&asflags_obst, "%s", ASSEMBLER);
 360         }
 361         if (flags[0] != '\0')
 362                 obstack_printf(&asflags_obst, " %s", flags);
 363
 364         obstack_printf(&asflags_obst, " %s -o %s", in, out);
 365         obstack_1grow(&asflags_obst, '\0');
 366
 367         char *commandline = obstack_finish(&asflags_obst);
 368         if (verbose) {
 369                 puts(commandline);
 370         }
 371         int err = system(commandline);
 372         if (err != EXIT_SUCCESS) {
 373                 fprintf(stderr, "assembler reported an error\n");
 374                 exit(EXIT_FAILURE);
 375         }
 376         obstack_free(&asflags_obst, commandline);
 377 }
 378
 379 static void print_file_name(const char *file)
 380 {
 381         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 382
 383         obstack_1grow(&ldflags_obst, '\0');
 384         const char *flags = obstack_finish(&ldflags_obst);
 385
 386         /* construct commandline */
 387         const char *linker = getenv("CPARSER_LINK");
 388         if (linker != NULL) {
 389                 obstack_printf(&ldflags_obst, "%s ", linker);
 390         } else {
 391                 if (target_triple != NULL)
 392                         obstack_printf(&ldflags_obst, "%s-", target_triple);
 393                 obstack_printf(&ldflags_obst, "%s ", LINKER);
 394         }
 395         obstack_printf(&ldflags_obst, "%s ", linker);
 396         obstack_printf(&ldflags_obst, "%s", flags);
 397         obstack_1grow(&ldflags_obst, '\0');
 398
 399         char *commandline = obstack_finish(&ldflags_obst);
 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(EXIT_FAILURE);
 407         }
 408         obstack_free(&ldflags_obst, commandline);
 409 }
 410
 411 static const char *try_dir(const char *dir)
 412 {
 413         if (dir == NULL)
 414                 return dir;
 415         if (access(dir, R_OK | W_OK | X_OK) == 0)
 416                 return dir;
 417         return NULL;
 418 }
 419
 420 static const char *get_tempdir(void)
 421 {
 422         static const char *tmpdir = NULL;
 423
 424         if (tmpdir != NULL)
 425                 return tmpdir;
 426
 427         if (tmpdir == NULL)
 428                 tmpdir = try_dir(getenv("TMPDIR"));
 429         if (tmpdir == NULL)
 430                 tmpdir = try_dir(getenv("TMP"));
 431         if (tmpdir == NULL)
 432                 tmpdir = try_dir(getenv("TEMP"));
 433
 434 #ifdef P_tmpdir
 435         if (tmpdir == NULL)
 436                 tmpdir = try_dir(P_tmpdir);
 437 #endif
 438
 439         if (tmpdir == NULL)
 440                 tmpdir = try_dir("/var/tmp");
 441         if (tmpdir == NULL)
 442                 tmpdir = try_dir("/usr/tmp");
 443         if (tmpdir == NULL)
 444                 tmpdir = try_dir("/tmp");
 445
 446         if (tmpdir == NULL)
 447                 tmpdir = ".";
 448
 449         return tmpdir;
 450 }
 451
 452 #ifndef HAVE_MKSTEMP
 453 /* cheap and nasty mkstemp replacement */
 454 static int mkstemp(char *templ)
 455 {
 456         mktemp(templ);
 457         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 458 }
 459 #endif
 460
 461 /**
 462  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 463  * during linking (like glibc/gnu ld do for tmpnam)...
 464  */
 465 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 466 {
 467         const char *tempdir = get_tempdir();
 468
 469         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 470
 471         int fd = mkstemp(buffer);
 472         if (fd == -1) {
 473                 fprintf(stderr, "could not create temporary file: %s\n",
 474                         strerror(errno));
 475                 exit(EXIT_FAILURE);
 476         }
 477         FILE *out = fdopen(fd, "w");
 478         if (out == NULL) {
 479                 fprintf(stderr, "could not create temporary file FILE*\n");
 480                 exit(EXIT_FAILURE);
 481         }
 482
 483         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 484         memset(entry, 0, sizeof(*entry));
 485
 486         size_t  name_len = strlen(buffer) + 1;
 487         char   *name     = malloc(name_len);
 488         memcpy(name, buffer, name_len);
 489         entry->name      = name;
 490
 491         entry->next = temp_files;
 492         temp_files  = entry;
 493
 494         return out;
 495 }
 496
 497 static void free_temp_files(void)
 498 {
 499         file_list_entry_t *entry = temp_files;
 500         file_list_entry_t *next;
 501         for ( ; entry != NULL; entry = next) {
 502                 next = entry->next;
 503
 504                 unlink(entry->name);
 505                 free((char*) entry->name);
 506                 free(entry);
 507         }
 508         temp_files = NULL;
 509 }
 510
 511 typedef enum compile_mode_t {
 512         BenchmarkParser,
 513         PreprocessOnly,
 514         ParseOnly,
 515         Compile,
 516         CompileDump,
 517         CompileExportIR,
 518         CompileAssemble,
 519         CompileAssembleLink,
 520         LexTest,
 521         PrintAst,
 522         PrintFluffy,
 523         PrintJna
 524 } compile_mode_t;
 525
 526 static void usage(const char *argv0)
 527 {
 528         fprintf(stderr, "Usage %s [options] input [-o output]\n", argv0);
 529 }
 530
 531 static void print_cparser_version(void)
 532 {
 533         printf("cparser (%s) using libFirm (%u.%u",
 534                cparser_REVISION, ir_get_version_major(),
 535                ir_get_version_minor());
 536
 537         const char *revision = ir_get_version_revision();
 538         if (revision[0] != 0) {
 539                 putchar(' ');
 540                 fputs(revision, stdout);
 541         }
 542
 543         const char *build = ir_get_version_build();
 544         if (build[0] != 0) {
 545                 putchar(' ');
 546                 fputs(build, stdout);
 547         }
 548         puts(")");
 549         puts("This is free software; see the source for copying conditions.  There is NO\n"
 550              "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
 551 }
 552
 553 static void print_help_basic(const char *argv0)
 554 {
 555         usage(argv0);
 556         puts("");
 557         put_help("--help",                   "Display this information");
 558         put_help("--version",                "Display compiler version");
 559         put_help("--help-parser",            "Display information about parser options");
 560         put_help("--help-warnings",          "Display information about warning options");
 561         put_help("--help-codegen",           "Display information about code-generation options");
 562         put_help("--help-optimization",      "Display information about optimization options");
 563         put_help("--help-linker",            "Display information about linker options");
 564         put_help("--help-language-tools",    "Display information about language tools options");
 565         put_help("--help-debug",             "Display information about compiler debugging options");
 566         put_help("--help-firm",              "Display information about direct firm options");
 567         put_help("--help-all",               "Display information about all options");
 568         put_help("-c",                       "Compile and assemble but do not link");
 569         put_help("-E",                       "Preprocess only");
 570         put_help("-S",                       "Compile but do not assembler or link");
 571         put_help("-o",                       "Specify output file");
 572         put_help("-v",                       "Verbose output (show invocation of sub-processes)");
 573         put_help("-x",                       "Force input language:");
 574         put_choice("c",                      "C");
 575         put_choice("c++",                    "C++");
 576         put_choice("assembler",              "Assembler (no preprocessing)");
 577         put_choice("assembler-with-cpp",     "Assembler with preprocessing");
 578         put_choice("none",                   "Autodetection");
 579         put_help("-pipe",                    "Ignored (gcc compatibility)");
 580 }
 581
 582 static void print_help_preprocessor(void)
 583 {
 584         put_help("-nostdinc",                "Do not search standard system include directories");
 585         put_help("-trigraphs",               "Support ISO C trigraphs");
 586         put_help("-isystem",                 "");
 587         put_help("-include",                 "");
 588         put_help("-I PATH",                  "");
 589         put_help("-D SYMBOL[=value]",        "");
 590         put_help("-U SYMBOL",                "");
 591         put_help("-Wp,OPTION",               "Pass option directly to preprocessor");
 592         put_help("-M",                       "");
 593         put_help("-MD",                      "");
 594         put_help("-MMD",                     "");
 595         put_help("-MM",                      "");
 596         put_help("-MP",                      "");
 597         put_help("-MT",                      "");
 598         put_help("-MQ",                      "");
 599         put_help("-MF",                      "");
 600 }
 601
 602 static void print_help_parser(void)
 603 {
 604         put_help("-finput-charset=CHARSET",  "Select encoding of input files");
 605         put_help("-fmessage-length=LEN",     "Ignored (gcc compatibility)");
 606         put_help("-fshort-wchar",            "Type \"wchar_t\" is unsigned short instead of int");
 607         put_help("-fshow-column",            "Show the column number in diagnostic messages");
 608         put_help("-fsigned-char",            "Type \"char\" is a signed type");
 609         put_help("-funsigned-char",          "Type \"char\" is an unsigned type");
 610         put_help("--ms",                     "Enable msvc extensions");
 611         put_help("--no-ms",                  "Disable msvc extensions");
 612         put_help("--gcc",                    "Enable gcc extensions");
 613         put_help("--no-gcc",                 "Disable gcc extensions");
 614         put_help("-std=STANDARD",            "Specify language standard:");
 615         put_choice("c99",                    "ISO C99 standard");
 616         put_choice("c89",                    "ISO C89 standard");
 617         put_choice("c9x",                    "Deprecated");
 618         put_choice("c++",                    "ISO C++ 98");
 619         put_choice("c++98",                  "ISO C++ 98");
 620         put_choice("gnu99",                  "ISO C99 + GNU extensions (default)");
 621         put_choice("gnu89",                  "ISO C89 + GNU extensions");
 622         put_choice("gnu9x",                  "Deprecated");
 623         put_choice("iso9899:1990",           "ISO C89");
 624         put_choice("iso9899:199409",         "ISO C90");
 625         put_choice("iso9899:1999",           "ISO C99");
 626         put_choice("iso9899:199x",           "Deprecated");
 627         put_help("-pedantic",                "Ignored (gcc compatibility)");
 628         put_help("-ansi",                    "Ignored (gcc compatibility)");
 629         put_help("--strict",                 "Enable strict conformance checking");
 630 }
 631
 632 static void print_help_warnings(void)
 633 {
 634         put_help("-f[no-]diagnostics-show-option", "Show the switch, which controls a warning, after each warning");
 635         put_help("-w",                             "Disable all warnings");
 636         put_help("-Wno-trigraphs",                 "Warn if input contains trigraphs");
 637         put_help("-Wundef",                        "Warn if an undefined macro is used in an #if");
 638         put_help("-Wmissing-include-dirs",         "Warn about missing user-specified include directories");
 639         put_help("-Wendif-labels",                 "Warn about stray text after #elif and #endif");
 640         put_help("-Winit-self",                    "Ignored (gcc compatibility)");
 641         put_help("-Wformat-y2k",                   "Ignored (gcc compatibility)");
 642         put_help("-Wformat-security",              "Ignored (gcc compatibility)");
 643         put_help("-Wold-style-declaration",        "Ignored (gcc compatibility)");
 644         put_help("-Wtype-limits",                  "Ignored (gcc compatibility)");
 645         print_warning_opt_help();
 646 }
 647
 648 static void print_help_optimization(void)
 649 {
 650         put_help("-O LEVEL",                 "Select optimization level (0-4)");
 651         firm_option_help(put_help);
 652         put_help("-fexpensive-optimizations","Ignored (gcc compatibility)");
 653 }
 654
 655 static void print_help_codegeneration(void)
 656 {
 657         put_help("-g",                       "Generate debug information");
 658         put_help("-pg",                      "Instrument code for gnu gprof");
 659         put_help("-fomit-frame-pointer",     "Produce code without frame pointer where possible");
 660         put_help("-ffreestanding",           "Compile in freestanding mode (see ISO C standard)");
 661         put_help("-fhosted",                 "Compile in hosted (not freestanding) mode");
 662         put_help("-fprofile-generate",       "Generate instrumented code to collect profile information");
 663         put_help("-fprofile-use",            "Use profile information generated by instrumented binaries");
 664         put_help("-ffp-precise",             "Precise floating point model");
 665         put_help("-ffp-fast",                "Imprecise floating point model");
 666         put_help("-ffp-strict",              "Strict floating point model");
 667         put_help("-pthread",                 "Use pthread threading library");
 668         put_help("-mtarget=TARGET",          "Specify target architecture as CPU-manufacturer-OS triple");
 669         put_help("-mtriple=TARGET",          "Alias for -mtarget (clang compatibility)");
 670         put_help("-march=ARCH",              "");
 671         put_help("-mtune=ARCH",              "");
 672         put_help("-mcpu=CPU",                "");
 673         put_help("-mfpmath=",                "");
 674         put_help("-mpreferred-stack-boundary=", "");
 675         put_help("-mrtd",                    "");
 676         put_help("-mregparm=",               "Not supported yet");
 677         put_help("-msoft-float",             "Not supported yet");
 678         put_help("-m32",                     "Generate 32bit code");
 679         put_help("-m64",                     "Generate 64bit code");
 680         put_help("-fverbose-asm",            "Ignored (gcc compatibility)");
 681         put_help("-fjump-tables",            "Ignored (gcc compatibility)");
 682         put_help("-fcommon",                 "Ignored (gcc compatibility)");
 683         put_help("-foptimize-sibling-calls", "Ignored (gcc compatibility)");
 684         put_help("-falign-loops",            "Ignored (gcc compatibility)");
 685         put_help("-falign-jumps",            "Ignored (gcc compatibility)");
 686         put_help("-falign-functions",        "Ignored (gcc compatibility)");
 687         put_help("-fPIC",                    "Ignored (gcc compatibility)");
 688         put_help("-ffast-math",              "Same as -ffp-fast (gcc compatibility)");
 689         puts("");
 690         puts("\tMost of these options can be used with a no- prefix to disable them");
 691         puts("\te.g. -fno-omit-frame-pointer");
 692 }
 693
 694 static void print_help_linker(void)
 695 {
 696         put_help("-l LIBRARY",               "");
 697         put_help("-L PATH",                  "");
 698         put_help("-shared",                  "Produce a shared library");
 699         put_help("-static",                  "Produce statically linked binary");
 700         put_help("-Wl,OPTION",               "Pass option directly to linker");
 701 }
 702
 703 static void print_help_debug(void)
 704 {
 705         put_help("--lextest",                "Preprocess and tokenize only");
 706         put_help("--print-ast",              "Preprocess, parse and print AST");
 707         put_help("--print-implicit-cast",    "");
 708         put_help("--print-parenthesis",      "");
 709         put_help("--benchmark",              "Preprocess and parse, produces no output");
 710         put_help("--time",                   "Measure time of compiler passes");
 711         put_help("--dump-function func",     "Preprocess, parse and output vcg graph of func");
 712         put_help("--export-ir",              "Preprocess, parse and output compiler intermediate representation");
 713 }
 714
 715 static void print_help_language_tools(void)
 716 {
 717         put_help("--print-fluffy",           "Preprocess, parse and generate declarations for the fluffy language");
 718         put_help("--print-jna",              "Preprocess, parse and generate declarations for JNA");
 719         put_help("--jna-limit filename",     "");
 720         put_help("--jna-libname name",       "");
 721 }
 722
 723 static void print_help_firm(void)
 724 {
 725         put_help("-bOPTION",                 "Directly pass option to libFirm backend");
 726         int res = be_parse_arg("help");
 727         (void) res;
 728         assert(res);
 729 }
 730
 731 typedef enum {
 732         HELP_NONE          = 0,
 733         HELP_BASIC         = 1u << 0,
 734         HELP_PREPROCESSOR  = 1u << 1,
 735         HELP_PARSER        = 1u << 2,
 736         HELP_WARNINGS      = 1u << 3,
 737         HELP_OPTIMIZATION  = 1u << 4,
 738         HELP_CODEGEN       = 1u << 5,
 739         HELP_LINKER        = 1u << 6,
 740         HELP_LANGUAGETOOLS = 1u << 7,
 741         HELP_DEBUG         = 1u << 8,
 742         HELP_FIRM          = 1u << 9,
 743
 744         HELP_ALL           = (unsigned)-1
 745 } help_sections_t;
 746
 747 static void print_help(const char *argv0, help_sections_t sections)
 748 {
 749         if (sections & HELP_BASIC)         print_help_basic(argv0);
 750         if (sections & HELP_PREPROCESSOR)  print_help_preprocessor();
 751         if (sections & HELP_PARSER)        print_help_parser();
 752         if (sections & HELP_WARNINGS)      print_help_warnings();
 753         if (sections & HELP_OPTIMIZATION)  print_help_optimization();
 754         if (sections & HELP_CODEGEN)       print_help_codegeneration();
 755         if (sections & HELP_LINKER)        print_help_linker();
 756         if (sections & HELP_LANGUAGETOOLS) print_help_language_tools();
 757         if (sections & HELP_DEBUG)         print_help_debug();
 758         if (sections & HELP_FIRM)          print_help_firm();
 759 }
 760
 761 static void set_be_option(const char *arg)
 762 {
 763         int res = be_parse_arg(arg);
 764         (void) res;
 765         assert(res);
 766 }
 767
 768 static void copy_file(FILE *dest, FILE *input)
 769 {
 770         char buf[16384];
 771
 772         while (!feof(input) && !ferror(dest)) {
 773                 size_t read = fread(buf, 1, sizeof(buf), input);
 774                 if (fwrite(buf, 1, read, dest) != read) {
 775                         perror("could not write output");
 776                 }
 777         }
 778 }
 779
 780 static FILE *open_file(const char *filename)
 781 {
 782         if (streq(filename, "-")) {
 783                 return stdin;
 784         }
 785
 786         FILE *in = fopen(filename, "r");
 787         if (in == NULL) {
 788                 fprintf(stderr, "Could not open '%s': %s\n", filename,
 789                                 strerror(errno));
 790                 exit(EXIT_FAILURE);
 791         }
 792
 793         return in;
 794 }
 795
 796 static filetype_t get_filetype_from_string(const char *string)
 797 {
 798         if (streq(string, "c") || streq(string, "c-header"))
 799                 return FILETYPE_C;
 800         if (streq(string, "c++") || streq(string, "c++-header"))
 801                 return FILETYPE_CXX;
 802         if (streq(string, "assembler"))
 803                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 804         if (streq(string, "assembler-with-cpp"))
 805                 return FILETYPE_ASSEMBLER;
 806         if (streq(string, "none"))
 807                 return FILETYPE_AUTODETECT;
 808
 809         return FILETYPE_UNKNOWN;
 810 }
 811
 812 static bool is_windows_os(const char *os)
 813 {
 814         return strstr(os, "mingw") != NULL || streq(os, "win32");
 815 }
 816
 817 static bool is_unixish_os(const char *os)
 818 {
 819         return strstr(os, "linux") != NULL || strstr(os, "bsd") != NULL
 820                || streq(os, "solaris");
 821 }
 822
 823 static bool is_darwin_os(const char *os)
 824 {
 825         return streq(os, "darwin");
 826 }
 827
 828 static bool init_os_support(void)
 829 {
 830         const char *os = target_machine->operating_system;
 831         wchar_atomic_kind         = ATOMIC_TYPE_INT;
 832         enable_main_collect2_hack = false;
 833         define_intmax_types       = false;
 834
 835         if (is_unixish_os(os)) {
 836                 set_create_ld_ident(create_name_linux_elf);
 837         } else if (is_darwin_os(os)) {
 838                 set_create_ld_ident(create_name_macho);
 839                 define_intmax_types = true;
 840         } else if (is_windows_os(os)) {
 841                 wchar_atomic_kind         = ATOMIC_TYPE_USHORT;
 842                 enable_main_collect2_hack = true;
 843                 set_create_ld_ident(create_name_win32);
 844         } else {
 845                 return false;
 846         }
 847
 848         return true;
 849 }
 850
 851 static bool parse_target_triple(const char *arg)
 852 {
 853         machine_triple_t *triple = firm_parse_machine_triple(arg);
 854         if (triple == NULL) {
 855                 fprintf(stderr, "Target-triple is not in the form 'cpu_type-manufacturer-operating_system'\n");
 856                 return false;
 857         }
 858         target_machine = triple;
 859         return true;
 860 }
 861
 862 static unsigned decide_modulo_shift(unsigned type_size)
 863 {
 864         if (architecture_modulo_shift == 0)
 865                 return 0;
 866         if (type_size < architecture_modulo_shift)
 867                 return architecture_modulo_shift;
 868         return type_size;
 869 }
 870
 871 static void setup_target_machine(void)
 872 {
 873         if (!setup_firm_for_machine(target_machine))
 874                 exit(1);
 875
 876         init_os_support();
 877 }
 878
 879 /**
 880  * initialize cparser type properties based on a firm type
 881  */
 882 static void set_typeprops_type(atomic_type_properties_t* props, ir_type *type)
 883 {
 884         props->size             = get_type_size_bytes(type);
 885         props->alignment        = get_type_alignment_bytes(type);
 886         props->struct_alignment = props->alignment;
 887 }
 888
 889 static bool is_ia32_cpu(const char *architecture)
 890 {
 891         return streq(architecture, "i386")
 892             || streq(architecture, "i486")
 893             || streq(architecture, "i586")
 894             || streq(architecture, "i686")
 895             || streq(architecture, "i786");
 896 }
 897
 898 static void init_types_and_adjust(void)
 899 {
 900         const backend_params *be_params = be_get_backend_param();
 901         unsigned machine_size = be_params->machine_size;
 902         init_types(machine_size);
 903
 904         atomic_type_properties_t *props = atomic_type_properties;
 905
 906         /* adjust types as requested by target architecture */
 907         ir_type *type_long_double = be_params->type_long_double;
 908         if (type_long_double != NULL)
 909                 set_typeprops_type(&props[ATOMIC_TYPE_LONG_DOUBLE], type_long_double);
 910
 911         ir_type *type_long_long = be_params->type_long_long;
 912         if (type_long_long != NULL)
 913                 set_typeprops_type(&props[ATOMIC_TYPE_LONGLONG], type_long_long);
 914
 915         ir_type *type_unsigned_long_long = be_params->type_unsigned_long_long;
 916         if (type_long_long != NULL)
 917                 set_typeprops_type(&props[ATOMIC_TYPE_ULONGLONG], type_unsigned_long_long);
 918
 919         /* operating system ABI specifics */
 920         const char *os = target_machine->operating_system;
 921         if (is_darwin_os(os)) {
 922                 if (machine_size == 32) {
 923                         props[ATOMIC_TYPE_DOUBLE].struct_alignment = 4;
 924                         props[ATOMIC_TYPE_LONG_DOUBLE].size        = 16;
 925                         props[ATOMIC_TYPE_LONG_DOUBLE].alignment   = 16;
 926                 }
 927         } else if (is_windows_os(os)) {
 928                 if (machine_size == 64) {
 929                         /* to ease porting of old c-code microsoft decided to use 32bits
 930                          * even for long */
 931                         props[ATOMIC_TYPE_LONG]  = props[ATOMIC_TYPE_INT];
 932                         props[ATOMIC_TYPE_ULONG] = props[ATOMIC_TYPE_UINT];
 933                 }
 934
 935                 /* on windows long double is not supported */
 936                 props[ATOMIC_TYPE_LONG_DOUBLE] = props[ATOMIC_TYPE_DOUBLE];
 937         } else if (is_unixish_os(os)) {
 938                 if (is_ia32_cpu(target_machine->cpu_type)) {
 939                         /* System V has a broken alignment for double so we have to add
 940                          * a hack here */
 941                         props[ATOMIC_TYPE_DOUBLE].struct_alignment    = 4;
 942                         props[ATOMIC_TYPE_LONGLONG].struct_alignment  = 4;
 943                         props[ATOMIC_TYPE_ULONGLONG].struct_alignment = 4;
 944                 }
 945         }
 946
 947         /* stuff decided after processing operating system specifics and
 948          * commandline flags */
 949         props[ATOMIC_TYPE_WCHAR_T] = props[wchar_atomic_kind];
 950         if (char_is_signed) {
 951                 props[ATOMIC_TYPE_CHAR].flags |= ATOMIC_TYPE_FLAG_SIGNED;
 952         } else {
 953                 props[ATOMIC_TYPE_CHAR].flags &= ~ATOMIC_TYPE_FLAG_SIGNED;
 954         }
 955
 956         /* initialize defaults for unsupported types */
 957         if (type_long_long == NULL) {
 958                 props[ATOMIC_TYPE_LONGLONG] = props[ATOMIC_TYPE_LONG];
 959         }
 960         if (type_long_double == NULL) {
 961                 props[ATOMIC_TYPE_LONG_DOUBLE] = props[ATOMIC_TYPE_DOUBLE];
 962         }
 963         if (type_unsigned_long_long == NULL) {
 964                 props[ATOMIC_TYPE_ULONGLONG] = props[ATOMIC_TYPE_ULONG];
 965         }
 966
 967         /* initialize firm pointer modes */
 968         char               name[64];
 969         ir_mode_sort       sort         = irms_reference;
 970         unsigned           bit_size     = machine_size;
 971         bool               is_signed    = 0;
 972         ir_mode_arithmetic arithmetic   = irma_twos_complement;
 973         unsigned           modulo_shift = decide_modulo_shift(bit_size);
 974
 975         snprintf(name, sizeof(name), "p%u", machine_size);
 976         ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
 977                                         modulo_shift);
 978
 979         if (machine_size == 16) {
 980                 set_reference_mode_signed_eq(ptr_mode, mode_Hs);
 981                 set_reference_mode_unsigned_eq(ptr_mode, mode_Hu);
 982         } else if (machine_size == 32) {
 983                 set_reference_mode_signed_eq(ptr_mode, mode_Is);
 984                 set_reference_mode_unsigned_eq(ptr_mode, mode_Iu);
 985         } else if (machine_size == 64) {
 986                 set_reference_mode_signed_eq(ptr_mode, mode_Ls);
 987                 set_reference_mode_unsigned_eq(ptr_mode, mode_Lu);
 988         } else {
 989                 panic("strange machine_size when determining pointer modes");
 990         }
 991
 992         /* Hmm, pointers should be machine size */
 993         set_modeP_data(ptr_mode);
 994         set_modeP_code(ptr_mode);
 995
 996         byte_order_big_endian = be_params->byte_order_big_endian;
 997         if (be_params->modulo_shift_efficient) {
 998                 architecture_modulo_shift = machine_size;
 999         } else {
1000                 architecture_modulo_shift = 0;
1001         }
1002 }
1003
1004 int main(int argc, char **argv)
1005 {
1006         firm_early_init();
1007
1008         const char        *dumpfunction         = NULL;
1009         const char        *print_file_name_file = NULL;
1010         compile_mode_t     mode                 = CompileAssembleLink;
1011         int                opt_level            = 1;
1012         int                result               = EXIT_SUCCESS;
1013         char               cpu_arch[16]         = "ia32";
1014         file_list_entry_t *files                = NULL;
1015         file_list_entry_t *last_file            = NULL;
1016         bool               construct_dep_target = false;
1017         bool               do_timing            = false;
1018         bool               profile_generate     = false;
1019         bool               profile_use          = false;
1020         struct obstack     file_obst;
1021
1022         atexit(free_temp_files);
1023
1024         /* hack for now... */
1025         if (strstr(argv[0], "pptest") != NULL) {
1026                 extern int pptest_main(int argc, char **argv);
1027                 return pptest_main(argc, argv);
1028         }
1029
1030         obstack_init(&cppflags_obst);
1031         obstack_init(&ldflags_obst);
1032         obstack_init(&asflags_obst);
1033         obstack_init(&file_obst);
1034
1035 #define GET_ARG_AFTER(def, args)                                             \
1036         do {                                                                     \
1037         def = &arg[sizeof(args)-1];                                              \
1038         if (def[0] == '\0') {                                                    \
1039                 ++i;                                                                 \
1040                 if (i >= argc) {                                                     \
1041                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
1042                         argument_errors = true;                                          \
1043                         break;                                                           \
1044                 }                                                                    \
1045                 def = argv[i];                                                       \
1046                 if (def[0] == '-' && def[1] != '\0') {                               \
1047                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
1048                         argument_errors = true;                                          \
1049                         continue;                                                        \
1050                 }                                                                    \
1051         }                                                                        \
1052         } while (0)
1053
1054 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
1055
1056         /* early options parsing (find out optimization level and OS) */
1057         for (int i = 1; i < argc; ++i) {
1058                 const char *arg = argv[i];
1059                 if (arg[0] != '-')
1060                         continue;
1061
1062                 const char *option = &arg[1];
1063                 if (option[0] == 'O') {
1064                         sscanf(&option[1], "%d", &opt_level);
1065                 }
1066         }
1067
1068         const char *target = getenv("TARGET");
1069         if (target != NULL)
1070                 parse_target_triple(target);
1071         if (target_machine == NULL) {
1072                 target_machine = firm_get_host_machine();
1073         }
1074         choose_optimization_pack(opt_level);
1075         setup_target_machine();
1076
1077         /* parse rest of options */
1078                         standard        = STANDARD_DEFAULT;
1079         unsigned        features_on     = 0;
1080         unsigned        features_off    = 0;
1081         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
1082         help_sections_t help            = HELP_NONE;
1083         bool            argument_errors = false;
1084         for (int i = 1; i < argc; ++i) {
1085                 const char *arg = argv[i];
1086                 if (arg[0] == '-' && arg[1] != '\0') {
1087                         /* an option */
1088                         const char *option = &arg[1];
1089                         if (option[0] == 'o') {
1090                                 GET_ARG_AFTER(outname, "-o");
1091                         } else if (option[0] == 'g') {
1092                                 set_be_option("debuginfo=stabs");
1093                                 set_be_option("omitfp=no");
1094                                 set_be_option("ia32-nooptcc=yes");
1095                         } else if (SINGLE_OPTION('c')) {
1096                                 mode = CompileAssemble;
1097                         } else if (SINGLE_OPTION('E')) {
1098                                 mode = PreprocessOnly;
1099                         } else if (SINGLE_OPTION('S')) {
1100                                 mode = Compile;
1101                         } else if (option[0] == 'O') {
1102                                 continue;
1103                         } else if (option[0] == 'I') {
1104                                 const char *opt;
1105                                 GET_ARG_AFTER(opt, "-I");
1106                                 add_flag(&cppflags_obst, "-I%s", opt);
1107                         } else if (option[0] == 'D') {
1108                                 const char *opt;
1109                                 GET_ARG_AFTER(opt, "-D");
1110                                 add_flag(&cppflags_obst, "-D%s", opt);
1111                         } else if (option[0] == 'U') {
1112                                 const char *opt;
1113                                 GET_ARG_AFTER(opt, "-U");
1114                                 add_flag(&cppflags_obst, "-U%s", opt);
1115                         } else if (option[0] == 'l') {
1116                                 const char *opt;
1117                                 GET_ARG_AFTER(opt, "-l");
1118                                 add_flag(&ldflags_obst, "-l%s", opt);
1119                         } else if (option[0] == 'L') {
1120                                 const char *opt;
1121                                 GET_ARG_AFTER(opt, "-L");
1122                                 add_flag(&ldflags_obst, "-L%s", opt);
1123                         } else if (SINGLE_OPTION('v')) {
1124                                 verbose = 1;
1125                         } else if (SINGLE_OPTION('w')) {
1126                                 disable_all_warnings();
1127                         } else if (option[0] == 'x') {
1128                                 const char *opt;
1129                                 GET_ARG_AFTER(opt, "-x");
1130                                 forced_filetype = get_filetype_from_string(opt);
1131                                 if (forced_filetype == FILETYPE_UNKNOWN) {
1132                                         fprintf(stderr, "Unknown language '%s'\n", opt);
1133                                         argument_errors = true;
1134                                 }
1135                         } else if (streq(option, "M")) {
1136                                 mode = PreprocessOnly;
1137                                 add_flag(&cppflags_obst, "-M");
1138                         } else if (streq(option, "MMD") ||
1139                                    streq(option, "MD")) {
1140                             construct_dep_target = true;
1141                                 add_flag(&cppflags_obst, "-%s", option);
1142                         } else if (streq(option, "MM")  ||
1143                                    streq(option, "MP")) {
1144                                 add_flag(&cppflags_obst, "-%s", option);
1145                         } else if (streq(option, "MT") ||
1146                                    streq(option, "MQ") ||
1147                                    streq(option, "MF")) {
1148                                 const char *opt;
1149                                 GET_ARG_AFTER(opt, "-MT");
1150                                 add_flag(&cppflags_obst, "-%s", option);
1151                                 add_flag(&cppflags_obst, "%s", opt);
1152                         } else if (streq(option, "include")) {
1153                                 const char *opt;
1154                                 GET_ARG_AFTER(opt, "-include");
1155                                 add_flag(&cppflags_obst, "-include");
1156                                 add_flag(&cppflags_obst, "%s", opt);
1157                         } else if (streq(option, "isystem")) {
1158                                 const char *opt;
1159                                 GET_ARG_AFTER(opt, "-isystem");
1160                                 add_flag(&cppflags_obst, "-isystem");
1161                                 add_flag(&cppflags_obst, "%s", opt);
1162 #if defined(linux) || defined(__linux) || defined(__linux__) || defined(__CYGWIN__)
1163                         } else if (streq(option, "pthread")) {
1164                                 /* set flags for the preprocessor */
1165                                 add_flag(&cppflags_obst, "-D_REENTRANT");
1166                                 /* set flags for the linker */
1167                                 add_flag(&ldflags_obst, "-lpthread");
1168 #endif
1169                         } else if (streq(option, "nostdinc")
1170                                         || streq(option, "trigraphs")) {
1171                                 /* pass these through to the preprocessor */
1172                                 add_flag(&cppflags_obst, "%s", arg);
1173                         } else if (streq(option, "pipe")) {
1174                                 /* here for gcc compatibility */
1175                         } else if (streq(option, "static")) {
1176                                 add_flag(&ldflags_obst, "-static");
1177                         } else if (streq(option, "shared")) {
1178                                 add_flag(&ldflags_obst, "-shared");
1179                         } else if (option[0] == 'f') {
1180                                 char const *orig_opt;
1181                                 GET_ARG_AFTER(orig_opt, "-f");
1182
1183                                 if (strstart(orig_opt, "input-charset=")) {
1184                                         char const* const encoding = strchr(orig_opt, '=') + 1;
1185                                         input_encoding = encoding;
1186                                 } else if (strstart(orig_opt, "align-loops=") ||
1187                                            strstart(orig_opt, "align-jumps=") ||
1188                                            strstart(orig_opt, "align-functions=")) {
1189                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
1190                                 } else if (strstart(orig_opt, "visibility=")) {
1191                                         const char *val = strchr(orig_opt, '=')+1;
1192                                         elf_visibility_tag_t visibility
1193                                                 = get_elf_visibility_from_string(val);
1194                                         if (visibility == ELF_VISIBILITY_ERROR) {
1195                                                 fprintf(stderr, "invalid visibility '%s' specified\n",
1196                                                         val);
1197                                                 argument_errors = true;
1198                                         } else {
1199                                                 set_default_visibility(visibility);
1200                                         }
1201                                 } else if (strstart(orig_opt, "message-length=")) {
1202                                         /* ignore: would only affect error message format */
1203                                 } else if (streq(orig_opt, "fast-math") ||
1204                                            streq(orig_opt, "fp-fast")) {
1205                                         firm_fp_model = fp_model_fast;
1206                                 } else if (streq(orig_opt, "fp-precise")) {
1207                                         firm_fp_model = fp_model_precise;
1208                                 } else if (streq(orig_opt, "fp-strict")) {
1209                                         firm_fp_model = fp_model_strict;
1210                                 } else if (streq(orig_opt, "help")) {
1211                                         fprintf(stderr, "warning: -fhelp is deprecated\n");
1212                                         help |= HELP_OPTIMIZATION;
1213                                 } else {
1214                                         /* -f options which have an -fno- variant */
1215                                         char const *opt         = orig_opt;
1216                                         bool        truth_value = true;
1217                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
1218                                                 truth_value = false;
1219                                                 opt += 3;
1220                                         }
1221
1222                                         if (streq(opt, "diagnostics-show-option")) {
1223                                                 diagnostics_show_option = truth_value;
1224                                         } else if (streq(opt, "dollars-in-identifiers")) {
1225                                                 allow_dollar_in_symbol = truth_value;
1226                                         } else if (streq(opt, "omit-frame-pointer")) {
1227                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
1228                                         } else if (streq(opt, "short-wchar")) {
1229                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
1230                                                         : ATOMIC_TYPE_INT;
1231                                         } else if (streq(opt, "show-column")) {
1232                                                 show_column = truth_value;
1233                                         } else if (streq(opt, "signed-char")) {
1234                                                 char_is_signed = truth_value;
1235                                         } else if (streq(opt, "strength-reduce")) {
1236                                                 /* does nothing, for gcc compatibility (even gcc does
1237                                                  * nothing for this switch anymore) */
1238                                         } else if (streq(opt, "syntax-only")) {
1239                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
1240                                         } else if (streq(opt, "unsigned-char")) {
1241                                                 char_is_signed = !truth_value;
1242                                         } else if (streq(opt, "freestanding")) {
1243                                                 freestanding = truth_value;
1244                                         } else if (streq(opt, "hosted")) {
1245                                                 freestanding = !truth_value;
1246                                         } else if (streq(opt, "profile-generate")) {
1247                                                 profile_generate = truth_value;
1248                                         } else if (streq(opt, "profile-use")) {
1249                                                 profile_use = truth_value;
1250                                         } else if (!truth_value &&
1251                                                    streq(opt, "asynchronous-unwind-tables")) {
1252                                             /* nothing todo, a gcc feature which we do not support
1253                                              * anyway was deactivated */
1254                                         } else if (streq(opt, "verbose-asm")) {
1255                                                 /* ignore: we always print verbose assembler */
1256                                         } else if (streq(opt, "jump-tables")             ||
1257                                                    streq(opt, "expensive-optimizations") ||
1258                                                    streq(opt, "common")                  ||
1259                                                    streq(opt, "optimize-sibling-calls")  ||
1260                                                    streq(opt, "align-loops")             ||
1261                                                    streq(opt, "align-jumps")             ||
1262                                                    streq(opt, "align-functions")         ||
1263                                                    streq(opt, "PIC")                     ||
1264                                                    streq(opt, "stack-protector")         ||
1265                                                    streq(opt, "stack-protector-all")) {
1266                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
1267                                         } else {
1268                                                 int res = firm_option(orig_opt);
1269                                                 if (res == 0) {
1270                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
1271                                                                 orig_opt);
1272                                                         argument_errors = true;
1273                                                         continue;
1274                                                 }
1275                                         }
1276                                 }
1277                         } else if (option[0] == 'b') {
1278                                 const char *opt;
1279                                 GET_ARG_AFTER(opt, "-b");
1280
1281                                 if (streq(opt, "help")) {
1282                                         fprintf(stderr, "warning: -bhelp is deprecated (use --help-firm)\n");
1283                                         help |= HELP_FIRM;
1284                                 } else {
1285                                         int res = be_parse_arg(opt);
1286                                         if (res == 0) {
1287                                                 fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
1288                                                                 opt);
1289                                                 argument_errors = true;
1290                                         } else if (strstart(opt, "isa=")) {
1291                                                 strncpy(cpu_arch, opt, sizeof(cpu_arch));
1292                                         }
1293                                 }
1294                         } else if (option[0] == 'W') {
1295                                 if (strstart(option + 1, "p,")) {
1296                                         // pass options directly to the preprocessor
1297                                         const char *opt;
1298                                         GET_ARG_AFTER(opt, "-Wp,");
1299                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
1300                                 } else if (strstart(option + 1, "l,")) {
1301                                         // pass options directly to the linker
1302                                         const char *opt;
1303                                         GET_ARG_AFTER(opt, "-Wl,");
1304                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
1305                                 } else if (streq(option + 1, "no-trigraphs")
1306                                                         || streq(option + 1, "undef")
1307                                                         || streq(option + 1, "missing-include-dirs")
1308                                                         || streq(option + 1, "endif-labels")) {
1309                                         add_flag(&cppflags_obst, "%s", arg);
1310                                 } else if (streq(option+1, "init-self")) {
1311                                         /* ignored (asme as gcc does) */
1312                                 } else if (streq(option+1, "format-y2k")
1313                                            || streq(option+1, "format-security")
1314                                            || streq(option+1, "old-style-declaration")
1315                                            || streq(option+1, "type-limits")) {
1316                                     /* ignore (gcc compatibility) */
1317                                 } else {
1318                                         set_warning_opt(&option[1]);
1319                                 }
1320                         } else if (option[0] == 'm') {
1321                                 /* -m options */
1322                                 const char *opt;
1323                                 char arch_opt[64];
1324
1325                                 GET_ARG_AFTER(opt, "-m");
1326                                 if (strstart(opt, "target=")) {
1327                                         GET_ARG_AFTER(opt, "-mtarget=");
1328                                         if (!parse_target_triple(opt)) {
1329                                                 argument_errors = true;
1330                                         } else {
1331                                                 setup_target_machine();
1332                                                 target_triple = opt;
1333                                         }
1334                                 } else if (strstart(opt, "triple=")) {
1335                                         GET_ARG_AFTER(opt, "-mtriple=");
1336                                         if (!parse_target_triple(opt)) {
1337                                                 argument_errors = true;
1338                                         } else {
1339                                                 setup_target_machine();
1340                                                 target_triple = opt;
1341                                         }
1342                                 } else if (strstart(opt, "arch=")) {
1343                                         GET_ARG_AFTER(opt, "-march=");
1344                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1345                                         int res = be_parse_arg(arch_opt);
1346                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1347                                         res &= be_parse_arg(arch_opt);
1348
1349                                         if (res == 0) {
1350                                                 fprintf(stderr, "Unknown architecture '%s'\n", arch_opt);
1351                                                 argument_errors = true;
1352                                         }
1353                                 } else if (strstart(opt, "tune=")) {
1354                                         GET_ARG_AFTER(opt, "-mtune=");
1355                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1356                                         int res = be_parse_arg(arch_opt);
1357                                         if (res == 0)
1358                                                 argument_errors = true;
1359                                 } else if (strstart(opt, "cpu=")) {
1360                                         GET_ARG_AFTER(opt, "-mcpu=");
1361                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1362                                         int res = be_parse_arg(arch_opt);
1363                                         if (res == 0)
1364                                                 argument_errors = true;
1365                                 } else if (strstart(opt, "fpmath=")) {
1366                                         GET_ARG_AFTER(opt, "-mfpmath=");
1367                                         if (streq(opt, "387"))
1368                                                 opt = "x87";
1369                                         else if (streq(opt, "sse"))
1370                                                 opt = "sse2";
1371                                         else {
1372                                                 fprintf(stderr, "error: option -mfpmath supports only 387 or sse\n");
1373                                                 argument_errors = true;
1374                                         }
1375                                         if (!argument_errors) {
1376                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
1377                                                 int res = be_parse_arg(arch_opt);
1378                                                 if (res == 0)
1379                                                         argument_errors = true;
1380                                         }
1381                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
1382                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
1383                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
1384                                         int res = be_parse_arg(arch_opt);
1385                                         if (res == 0)
1386                                                 argument_errors = true;
1387                                 } else if (streq(opt, "rtd")) {
1388                                         default_calling_convention = CC_STDCALL;
1389                                 } else if (strstart(opt, "regparm=")) {
1390                                         fprintf(stderr, "error: regparm convention not supported yet\n");
1391                                         argument_errors = true;
1392                                 } else if (streq(opt, "soft-float")) {
1393                                         snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=softfloat", cpu_arch);
1394                                         int res = be_parse_arg(arch_opt);
1395                                         if (res == 0)
1396                                                 argument_errors = true;
1397                                 } else {
1398                                         long int value = strtol(opt, NULL, 10);
1399                                         if (value == 0) {
1400                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
1401                                                 argument_errors = true;
1402                                         } else if (value != 16 && value != 32 && value != 64) {
1403                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
1404                                                 argument_errors = true;
1405                                         } else {
1406                                                 unsigned machine_size = (unsigned)value;
1407                                                 /* TODO: choose/change backend based on this */
1408                                                 add_flag(&cppflags_obst, "-m%u", machine_size);
1409                                                 add_flag(&asflags_obst, "-m%u", machine_size);
1410                                                 add_flag(&ldflags_obst, "-m%u", machine_size);
1411                                         }
1412                                 }
1413                         } else if (streq(option, "pg")) {
1414                                 set_be_option("gprof");
1415                                 add_flag(&ldflags_obst, "-pg");
1416                         } else if (streq(option, "pedantic") ||
1417                                    streq(option, "ansi")) {
1418                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1419                         } else if (strstart(option, "std=")) {
1420                                 const char *const o = &option[4];
1421                                 standard =
1422                                         streq(o, "c++")            ? STANDARD_CXX98   :
1423                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1424                                         streq(o, "c89")            ? STANDARD_C89     :
1425                                         streq(o, "c99")            ? STANDARD_C99     :
1426                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1427                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1428                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1429                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1430                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1431                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1432                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1433                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1434                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1435                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1436                         } else if (streq(option, "version")) {
1437                                 print_cparser_version();
1438                         } else if (strstart(option, "print-file-name=")) {
1439                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1440                         } else if (option[0] == '-') {
1441                                 /* double dash option */
1442                                 ++option;
1443                                 if (streq(option, "gcc")) {
1444                                         features_on  |=  _GNUC;
1445                                         features_off &= ~_GNUC;
1446                                 } else if (streq(option, "no-gcc")) {
1447                                         features_on  &= ~_GNUC;
1448                                         features_off |=  _GNUC;
1449                                 } else if (streq(option, "ms")) {
1450                                         features_on  |=  _MS;
1451                                         features_off &= ~_MS;
1452                                 } else if (streq(option, "no-ms")) {
1453                                         features_on  &= ~_MS;
1454                                         features_off |=  _MS;
1455                                 } else if (streq(option, "strict")) {
1456                                         strict_mode = true;
1457                                 } else if (streq(option, "lextest")) {
1458                                         mode = LexTest;
1459                                 } else if (streq(option, "benchmark")) {
1460                                         mode = BenchmarkParser;
1461                                 } else if (streq(option, "print-ast")) {
1462                                         mode = PrintAst;
1463                                 } else if (streq(option, "print-implicit-cast")) {
1464                                         print_implicit_casts = true;
1465                                 } else if (streq(option, "print-parenthesis")) {
1466                                         print_parenthesis = true;
1467                                 } else if (streq(option, "print-fluffy")) {
1468                                         mode = PrintFluffy;
1469                                 } else if (streq(option, "print-jna")) {
1470                                         mode = PrintJna;
1471                                 } else if (streq(option, "jna-limit")) {
1472                                         ++i;
1473                                         if (i >= argc) {
1474                                                 fprintf(stderr, "error: "
1475                                                         "expected argument after '--jna-limit'\n");
1476                                                 argument_errors = true;
1477                                                 break;
1478                                         }
1479                                         jna_limit_output(argv[i]);
1480                                 } else if (streq(option, "jna-libname")) {
1481                                         ++i;
1482                                         if (i >= argc) {
1483                                                 fprintf(stderr, "error: "
1484                                                         "expected argument after '--jna-libname'\n");
1485                                                 argument_errors = true;
1486                                                 break;
1487                                         }
1488                                         jna_set_libname(argv[i]);
1489                                 } else if (streq(option, "time")) {
1490                                         do_timing = true;
1491                                 } else if (streq(option, "version")) {
1492                                         print_cparser_version();
1493                                         return EXIT_SUCCESS;
1494                                 } else if (streq(option, "help")) {
1495                                         help |= HELP_BASIC;
1496                                 } else if (streq(option, "help-parser")) {
1497                                         help |= HELP_PARSER;
1498                                 } else if (streq(option, "help-warnings")) {
1499                                         help |= HELP_WARNINGS;
1500                                 } else if (streq(option, "help-codegen")) {
1501                                         help |= HELP_CODEGEN;
1502                                 } else if (streq(option, "help-linker")) {
1503                                         help |= HELP_LINKER;
1504                                 } else if (streq(option, "help-optimization")) {
1505                                         help |= HELP_OPTIMIZATION;
1506                                 } else if (streq(option, "help-language-tools")) {
1507                                         help |= HELP_LANGUAGETOOLS;
1508                                 } else if (streq(option, "help-debug")) {
1509                                         help |= HELP_DEBUG;
1510                                 } else if (streq(option, "help-firm")) {
1511                                         help |= HELP_FIRM;
1512                                 } else if (streq(option, "help-all")) {
1513                                         help |= HELP_ALL;
1514                                 } else if (streq(option, "dump-function")) {
1515                                         ++i;
1516                                         if (i >= argc) {
1517                                                 fprintf(stderr, "error: "
1518                                                         "expected argument after '--dump-function'\n");
1519                                                 argument_errors = true;
1520                                                 break;
1521                                         }
1522                                         dumpfunction = argv[i];
1523                                         mode         = CompileDump;
1524                                 } else if (streq(option, "export-ir")) {
1525                                         mode = CompileExportIR;
1526                                 } else {
1527                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1528                                         argument_errors = true;
1529                                 }
1530                         } else {
1531                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1532                                 argument_errors = true;
1533                         }
1534                 } else {
1535                         filetype_t type = forced_filetype;
1536                         if (type == FILETYPE_AUTODETECT) {
1537                                 if (streq(arg, "-")) {
1538                                         /* - implicitly means C source file */
1539                                         type = FILETYPE_C;
1540                                 } else {
1541                                         const char *suffix = strrchr(arg, '.');
1542                                         /* Ensure there is at least one char before the suffix */
1543                                         if (suffix != NULL && suffix != arg) {
1544                                                 ++suffix;
1545                                                 type =
1546                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1547                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1548                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1549                                                         streq(suffix, "i")   ? FILETYPE_PREPROCESSED_C         :
1550                                                         streq(suffix, "C")   ? FILETYPE_CXX                    :
1551                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1552                                                         streq(suffix, "cp")  ? FILETYPE_CXX                    :
1553                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1554                                                         streq(suffix, "CPP") ? FILETYPE_CXX                    :
1555                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1556                                                         streq(suffix, "c++") ? FILETYPE_CXX                    :
1557                                                         streq(suffix, "ii")  ? FILETYPE_PREPROCESSED_CXX       :
1558                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1559                                                         streq(suffix, "ir")  ? FILETYPE_IR                     :
1560                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1561                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1562                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1563                                                         FILETYPE_OBJECT; /* gcc behavior: unknown file extension means object file */
1564                                         }
1565                                 }
1566                         }
1567
1568                         file_list_entry_t *entry
1569                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1570                         memset(entry, 0, sizeof(entry[0]));
1571                         entry->name = arg;
1572                         entry->type = type;
1573
1574                         if (last_file != NULL) {
1575                                 last_file->next = entry;
1576                         } else {
1577                                 files = entry;
1578                         }
1579                         last_file = entry;
1580                 }
1581         }
1582
1583         if (help != HELP_NONE) {
1584                 print_help(argv[0], help);
1585                 return !argument_errors;
1586         }
1587
1588         if (print_file_name_file != NULL) {
1589                 print_file_name(print_file_name_file);
1590                 return EXIT_SUCCESS;
1591         }
1592         if (files == NULL) {
1593                 fprintf(stderr, "error: no input files specified\n");
1594                 argument_errors = true;
1595         }
1596
1597         if (argument_errors) {
1598                 usage(argv[0]);
1599                 return EXIT_FAILURE;
1600         }
1601
1602         /* apply some effects from switches */
1603         c_mode |= features_on;
1604         c_mode &= ~features_off;
1605         if (profile_generate) {
1606                 add_flag(&ldflags_obst, "-lfirmprof");
1607                 set_be_option("profilegenerate");
1608         }
1609         if (profile_use) {
1610                 set_be_option("profileuse");
1611         }
1612
1613         gen_firm_init();
1614         init_symbol_table();
1615         init_types_and_adjust();
1616         init_typehash();
1617         init_basic_types();
1618         if (wchar_atomic_kind == ATOMIC_TYPE_INT)
1619                 init_wchar_types(type_int);
1620         else if (wchar_atomic_kind == ATOMIC_TYPE_SHORT)
1621                 init_wchar_types(type_short);
1622         else
1623                 panic("unexpected wchar type");
1624         init_lexer();
1625         init_ast();
1626         init_parser();
1627         init_ast2firm();
1628         init_mangle();
1629
1630         if (do_timing)
1631                 timer_init();
1632
1633         if (construct_dep_target) {
1634                 if (outname != 0 && strlen(outname) >= 2) {
1635                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1636                 } else {
1637                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1638                 }
1639         } else {
1640                 dep_target[0] = '\0';
1641         }
1642
1643         char outnamebuf[4096];
1644         if (outname == NULL) {
1645                 const char *filename = files->name;
1646
1647                 switch(mode) {
1648                 case BenchmarkParser:
1649                 case PrintAst:
1650                 case PrintFluffy:
1651                 case PrintJna:
1652                 case LexTest:
1653                 case PreprocessOnly:
1654                 case ParseOnly:
1655                         outname = "-";
1656                         break;
1657                 case Compile:
1658                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1659                         outname = outnamebuf;
1660                         break;
1661                 case CompileAssemble:
1662                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1663                         outname = outnamebuf;
1664                         break;
1665                 case CompileDump:
1666                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1667                                         ".vcg");
1668                         outname = outnamebuf;
1669                         break;
1670                 case CompileExportIR:
1671                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
1672                         outname = outnamebuf;
1673                         break;
1674                 case CompileAssembleLink:
1675 #ifdef _WIN32
1676                         outname = "a.exe";
1677 #else
1678                         outname = "a.out";
1679 #endif
1680                         break;
1681                 }
1682         }
1683
1684         assert(outname != NULL);
1685
1686         FILE *out;
1687         if (streq(outname, "-")) {
1688                 out = stdout;
1689         } else {
1690                 out = fopen(outname, "w");
1691                 if (out == NULL) {
1692                         fprintf(stderr, "Could not open '%s' for writing: %s\n", outname,
1693                                         strerror(errno));
1694                         return EXIT_FAILURE;
1695                 }
1696         }
1697
1698         file_list_entry_t *file;
1699         bool               already_constructed_firm = false;
1700         for (file = files; file != NULL; file = file->next) {
1701                 char        asm_tempfile[1024];
1702                 const char *filename = file->name;
1703                 filetype_t  filetype = file->type;
1704
1705                 if (filetype == FILETYPE_OBJECT)
1706                         continue;
1707
1708                 FILE *in = NULL;
1709                 if (mode == LexTest) {
1710                         if (in == NULL)
1711                                 in = open_file(filename);
1712                         lextest(in, filename);
1713                         fclose(in);
1714                         return EXIT_SUCCESS;
1715                 }
1716
1717                 FILE *preprocessed_in = NULL;
1718                 filetype_t next_filetype = filetype;
1719                 switch (filetype) {
1720                         case FILETYPE_C:
1721                                 next_filetype = FILETYPE_PREPROCESSED_C;
1722                                 goto preprocess;
1723                         case FILETYPE_CXX:
1724                                 next_filetype = FILETYPE_PREPROCESSED_CXX;
1725                                 goto preprocess;
1726                         case FILETYPE_ASSEMBLER:
1727                                 next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1728                                 goto preprocess;
1729 preprocess:
1730                                 /* no support for input on FILE* yet */
1731                                 if (in != NULL)
1732                                         panic("internal compiler error: in for preprocessor != NULL");
1733
1734                                 preprocessed_in = preprocess(filename, filetype);
1735                                 if (mode == PreprocessOnly) {
1736                                         copy_file(out, preprocessed_in);
1737                                         int pp_result = pclose(preprocessed_in);
1738                                         fclose(out);
1739                                         /* remove output file in case of error */
1740                                         if (out != stdout && pp_result != EXIT_SUCCESS) {
1741                                                 unlink(outname);
1742                                         }
1743                                         return pp_result;
1744                                 }
1745
1746                                 in = preprocessed_in;
1747                                 filetype = next_filetype;
1748                                 break;
1749
1750                         default:
1751                                 break;
1752                 }
1753
1754                 FILE *asm_out;
1755                 if (mode == Compile) {
1756                         asm_out = out;
1757                 } else {
1758                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1759                 }
1760
1761                 if (in == NULL)
1762                         in = open_file(filename);
1763
1764                 /* preprocess and compile */
1765                 if (filetype == FILETYPE_PREPROCESSED_C) {
1766                         char const* invalid_mode;
1767                         switch (standard) {
1768                                 case STANDARD_ANSI:
1769                                 case STANDARD_C89:   c_mode = _C89;                break;
1770                                 /* TODO determine difference between these two */
1771                                 case STANDARD_C90:   c_mode = _C89;                break;
1772                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1773                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1774
1775 default_c_warn:
1776                                         fprintf(stderr,
1777                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1778                                                         invalid_mode);
1779                                         /* FALLTHROUGH */
1780                                 case STANDARD_DEFAULT:
1781                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1782
1783                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1784                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1785                         }
1786                         goto do_parsing;
1787                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1788                         char const* invalid_mode;
1789                         switch (standard) {
1790                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1791                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1792                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1793                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1794                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1795
1796                                 case STANDARD_ANSI:
1797                                 case STANDARD_CXX98: c_mode = _CXX; break;
1798
1799 default_cxx_warn:
1800                                         fprintf(stderr,
1801                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1802                                                         invalid_mode);
1803                                 case STANDARD_DEFAULT:
1804                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1805                         }
1806
1807 do_parsing:
1808                         c_mode |= features_on;
1809                         c_mode &= ~features_off;
1810
1811                         /* do the actual parsing */
1812                         ir_timer_t *t_parsing = ir_timer_new();
1813                         timer_register(t_parsing, "Frontend: Parsing");
1814                         timer_push(t_parsing);
1815                         init_tokens();
1816                         translation_unit_t *const unit = do_parsing(in, filename);
1817                         timer_pop(t_parsing);
1818
1819                         /* prints the AST even if errors occurred */
1820                         if (mode == PrintAst) {
1821                                 print_to_file(out);
1822                                 print_ast(unit);
1823                         }
1824
1825                         if (error_count > 0) {
1826                                 /* parsing failed because of errors */
1827                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1828                                         warning_count);
1829                                 result = EXIT_FAILURE;
1830                                 continue;
1831                         } else if (warning_count > 0) {
1832                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1833                         }
1834
1835                         if (in == preprocessed_in) {
1836                                 int pp_result = pclose(preprocessed_in);
1837                                 if (pp_result != EXIT_SUCCESS) {
1838                                         /* remove output file */
1839                                         if (out != stdout)
1840                                                 unlink(outname);
1841                                         return EXIT_FAILURE;
1842                                 }
1843                         }
1844
1845                         if (mode == BenchmarkParser) {
1846                                 return result;
1847                         } else if (mode == PrintFluffy) {
1848                                 write_fluffy_decls(out, unit);
1849                                 continue;
1850                         } else if (mode == PrintJna) {
1851                                 write_jna_decls(out, unit);
1852                                 continue;
1853                         }
1854
1855                         /* build the firm graph */
1856                         ir_timer_t *t_construct = ir_timer_new();
1857                         timer_register(t_construct, "Frontend: Graph construction");
1858                         timer_push(t_construct);
1859                         if (already_constructed_firm) {
1860                                 panic("compiling multiple files/translation units not possible");
1861                         }
1862                         translation_unit_to_firm(unit);
1863                         already_constructed_firm = true;
1864                         timer_pop(t_construct);
1865
1866 graph_built:
1867                         if (mode == ParseOnly) {
1868                                 continue;
1869                         }
1870
1871                         if (mode == CompileDump) {
1872                                 /* find irg */
1873                                 ident    *id     = new_id_from_str(dumpfunction);
1874                                 ir_graph *irg    = NULL;
1875                                 int       n_irgs = get_irp_n_irgs();
1876                                 for (int i = 0; i < n_irgs; ++i) {
1877                                         ir_graph *tirg   = get_irp_irg(i);
1878                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1879                                         if (irg_id == id) {
1880                                                 irg = tirg;
1881                                                 break;
1882                                         }
1883                                 }
1884
1885                                 if (irg == NULL) {
1886                                         fprintf(stderr, "No graph for function '%s' found\n",
1887                                                 dumpfunction);
1888                                         return EXIT_FAILURE;
1889                                 }
1890
1891                                 dump_ir_graph_file(out, irg);
1892                                 fclose(out);
1893                                 return EXIT_SUCCESS;
1894                         }
1895
1896                         if (mode == CompileExportIR) {
1897                                 fclose(out);
1898                                 ir_export(outname);
1899                                 return EXIT_SUCCESS;
1900                         }
1901
1902                         gen_firm_finish(asm_out, filename);
1903                         if (asm_out != out) {
1904                                 fclose(asm_out);
1905                         }
1906                 } else if (filetype == FILETYPE_IR) {
1907                         fclose(in);
1908                         ir_import(filename);
1909                         goto graph_built;
1910                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1911                         copy_file(asm_out, in);
1912                         if (in == preprocessed_in) {
1913                                 int pp_result = pclose(preprocessed_in);
1914                                 if (pp_result != EXIT_SUCCESS) {
1915                                         /* remove output in error case */
1916                                         if (out != stdout)
1917                                                 unlink(outname);
1918                                         return pp_result;
1919                                 }
1920                         }
1921                         if (asm_out != out) {
1922                                 fclose(asm_out);
1923                         }
1924                 }
1925
1926                 if (mode == Compile)
1927                         continue;
1928
1929                 /* if we're here then we have preprocessed assembly */
1930                 filename = asm_tempfile;
1931                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1932
1933                 /* assemble */
1934                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1935                         char        temp[1024];
1936                         const char *filename_o;
1937                         if (mode == CompileAssemble) {
1938                                 fclose(out);
1939                                 filename_o = outname;
1940                         } else {
1941                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1942                                 fclose(tempf);
1943                                 filename_o = temp;
1944                         }
1945
1946                         assemble(filename_o, filename);
1947
1948                         size_t len = strlen(filename_o) + 1;
1949                         filename = obstack_copy(&file_obst, filename_o, len);
1950                         filetype = FILETYPE_OBJECT;
1951                 }
1952
1953                 /* ok we're done here, process next file */
1954                 file->name = filename;
1955                 file->type = filetype;
1956         }
1957
1958         if (result != EXIT_SUCCESS) {
1959                 if (out != stdout)
1960                         unlink(outname);
1961                 return result;
1962         }
1963
1964         /* link program file */
1965         if (mode == CompileAssembleLink) {
1966                 obstack_1grow(&ldflags_obst, '\0');
1967                 const char *flags = obstack_finish(&ldflags_obst);
1968
1969                 /* construct commandline */
1970                 const char *linker = getenv("CPARSER_LINK");
1971                 if (linker != NULL) {
1972                         obstack_printf(&file_obst, "%s ", linker);
1973                 } else {
1974                         if (target_triple != NULL)
1975                                 obstack_printf(&file_obst, "%s-", target_triple);
1976                         obstack_printf(&file_obst, "%s ", LINKER);
1977                 }
1978
1979                 for (file_list_entry_t *entry = files; entry != NULL;
1980                                 entry = entry->next) {
1981                         if (entry->type != FILETYPE_OBJECT)
1982                                 continue;
1983
1984                         add_flag(&file_obst, "%s", entry->name);
1985                 }
1986
1987                 add_flag(&file_obst, "-o");
1988                 add_flag(&file_obst, outname);
1989                 obstack_printf(&file_obst, "%s", flags);
1990                 obstack_1grow(&file_obst, '\0');
1991
1992                 char *commandline = obstack_finish(&file_obst);
1993
1994                 if (verbose) {
1995                         puts(commandline);
1996                 }
1997                 int err = system(commandline);
1998                 if (err != EXIT_SUCCESS) {
1999                         fprintf(stderr, "linker reported an error\n");
2000                         return EXIT_FAILURE;
2001                 }
2002         }
2003
2004         if (do_timing)
2005                 timer_term(stderr);
2006
2007         obstack_free(&cppflags_obst, NULL);
2008         obstack_free(&ldflags_obst, NULL);
2009         obstack_free(&asflags_obst, NULL);
2010         obstack_free(&file_obst, NULL);
2011
2012         exit_mangle();
2013         exit_ast2firm();
2014         exit_parser();
2015         exit_ast();
2016         exit_lexer();
2017         exit_typehash();
2018         exit_types();
2019         exit_tokens();
2020         exit_symbol_table();
2021         return EXIT_SUCCESS;
2022 }