nsz Git - cparser/blob - main.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #define _GNU_SOURCE
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <stdbool.h>
  27 #include <errno.h>
  28 #include <string.h>
  29 #include <assert.h>
  30
  31 #ifdef _WIN32
  32
  33 #include <fcntl.h>
  34 #include <io.h>
  35
  36 /* no eXecute on Win32 */
  37 #define X_OK 0
  38 #define W_OK 2
  39 #define R_OK 4
  40
  41 #define O_RDWR          _O_RDWR
  42 #define O_CREAT         _O_CREAT
  43 #define O_EXCL          _O_EXCL
  44 #define O_BINARY        _O_BINARY
  45
  46 /* remap some names, we are not in the POSIX world */
  47 #define access(fname, mode)      _access(fname, mode)
  48 #define mktemp(tmpl)             _mktemp(tmpl)
  49 #define open(fname, oflag, mode) _open(fname, oflag, mode)
  50 #define fdopen(fd, mode)         _fdopen(fd, mode)
  51 #define popen(cmd, mode)         _popen(cmd, mode)
  52 #define pclose(file)             _pclose(file)
  53 #define unlink(filename)         _unlink(filename)
  54
  55 #else
  56 #include <unistd.h>
  57 #define HAVE_MKSTEMP
  58 #endif
  59
  60 #include <libfirm/firm.h>
  61 #include <libfirm/be.h>
  62
  63 #include "lexer.h"
  64 #include "token_t.h"
  65 #include "types.h"
  66 #include "type_hash.h"
  67 #include "parser.h"
  68 #include "type_t.h"
  69 #include "ast2firm.h"
  70 #include "diagnostic.h"
  71 #include "lang_features.h"
  72 #include "driver/firm_opt.h"
  73 #include "driver/firm_cmdline.h"
  74 #include "driver/firm_timing.h"
  75 #include "adt/error.h"
  76 #include "wrappergen/write_fluffy.h"
  77 #include "wrappergen/write_caml.h"
  78 #include "wrappergen/write_jna.h"
  79 #include "revision.h"
  80 #include "warning.h"
  81 #include "mangle.h"
  82 #include "printer.h"
  83
  84 #ifndef PREPROCESSOR
  85 #ifndef __WIN32__
  86 #define PREPROCESSOR "gcc -E -m32 -U__STRICT_ANSI__"
  87 #else
  88 #define PREPROCESSOR "cpp -m32 -U__STRICT_ANSI__"
  89 #endif
  90 #endif
  91
  92 #ifndef LINKER
  93 #define LINKER    "gcc -m32"
  94 #endif
  95
  96 #ifndef ASSEMBLER
  97 #ifdef __APPLE__
  98 #define ASSEMBLER "gcc -m32 -c -xassembler"
  99 #else
 100 #define ASSEMBLER "as --32"
 101 #endif
 102 #endif
 103
 104 unsigned int       c_mode                    = _C89 | _ANSI | _C99 | _GNUC;
 105 unsigned int       machine_size              = 32;
 106 bool               byte_order_big_endian     = false;
 107 bool               char_is_signed            = true;
 108 bool               strict_mode               = false;
 109 bool               use_builtins              = false;
 110 bool               have_const_functions      = false;
 111 atomic_type_kind_t wchar_atomic_kind         = ATOMIC_TYPE_INT;
 112 unsigned           force_long_double_size    = 0;
 113 bool               enable_main_collect2_hack = false;
 114 bool               freestanding              = false;
 115
 116 /* to switch on printing of implicit casts */
 117 extern bool print_implicit_casts;
 118
 119 /* to switch on printing of parenthesis to indicate operator precedence */
 120 extern bool print_parenthesis;
 121
 122 static const char     *target_triple;
 123 static int             verbose;
 124 static struct obstack  cppflags_obst, ldflags_obst;
 125 static char            dep_target[1024];
 126 static const char     *outname;
 127
 128 typedef enum lang_standard_t {
 129         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 130         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 131         STANDARD_C89,     /* ISO C90 (sic) */
 132         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 133         STANDARD_C99,     /* ISO C99 */
 134         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 135         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 136         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 137         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 138 } lang_standard_t;
 139
 140 static lang_standard_t standard;
 141
 142 typedef struct file_list_entry_t file_list_entry_t;
 143
 144 typedef enum filetype_t {
 145         FILETYPE_AUTODETECT,
 146         FILETYPE_C,
 147         FILETYPE_PREPROCESSED_C,
 148         FILETYPE_CXX,
 149         FILETYPE_PREPROCESSED_CXX,
 150         FILETYPE_ASSEMBLER,
 151         FILETYPE_PREPROCESSED_ASSEMBLER,
 152         FILETYPE_OBJECT,
 153         FILETYPE_IR,
 154         FILETYPE_UNKNOWN
 155 } filetype_t;
 156
 157 struct file_list_entry_t {
 158         const char  *name; /**< filename or NULL for stdin */
 159         filetype_t   type;
 160         file_list_entry_t *next;
 161 };
 162
 163 static file_list_entry_t *temp_files;
 164
 165 static void initialize_firm(void)
 166 {
 167         firm_early_init();
 168 }
 169
 170 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 171                             const char *newext)
 172 {
 173         if (inputname == NULL)
 174                 inputname = "a";
 175
 176         char const *const last_slash = strrchr(inputname, '/');
 177         char const *const filename   =
 178                 last_slash != NULL ? last_slash + 1 : inputname;
 179         char const *const last_dot   = strrchr(filename, '.');
 180         char const *const name_end   =
 181                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 182
 183         int const len = snprintf(buf, buflen, "%.*s%s",
 184                         (int)(name_end - filename), filename, newext);
 185 #ifdef _WIN32
 186         if (len < 0 || buflen <= (size_t)len)
 187 #else
 188         if (buflen <= (size_t)len)
 189 #endif
 190                 panic("filename too long");
 191 }
 192
 193 #include "gen_builtins.h"
 194
 195 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 196 {
 197         start_parsing();
 198
 199         if (use_builtins) {
 200                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 201                 parse();
 202         }
 203
 204         lexer_open_stream(in, input_name);
 205         parse();
 206
 207         translation_unit_t *unit = finish_parsing();
 208         return unit;
 209 }
 210
 211 static void lextest(FILE *in, const char *fname)
 212 {
 213         lexer_open_stream(in, fname);
 214
 215         do {
 216                 lexer_next_preprocessing_token();
 217                 print_token(stdout, &lexer_token);
 218                 putchar('\n');
 219         } while (lexer_token.type != T_EOF);
 220 }
 221
 222 static void add_flag(struct obstack *obst, const char *format, ...)
 223 {
 224         char buf[65536];
 225         va_list ap;
 226
 227         va_start(ap, format);
 228 #ifdef _WIN32
 229         int len =
 230 #endif
 231                 vsnprintf(buf, sizeof(buf), format, ap);
 232         va_end(ap);
 233
 234         obstack_1grow(obst, ' ');
 235 #ifdef _WIN32
 236         obstack_1grow(obst, '"');
 237         obstack_grow(obst, buf, len);
 238         obstack_1grow(obst, '"');
 239 #else
 240         /* escape stuff... */
 241         for (char *c = buf; *c != '\0'; ++c) {
 242                 switch(*c) {
 243                 case ' ':
 244                 case '"':
 245                 case '$':
 246                 case '&':
 247                 case '(':
 248                 case ')':
 249                 case ';':
 250                 case '<':
 251                 case '>':
 252                 case '\'':
 253                 case '\\':
 254                 case '\n':
 255                 case '\r':
 256                 case '\t':
 257                 case '`':
 258                 case '|':
 259                         obstack_1grow(obst, '\\');
 260                         /* FALLTHROUGH */
 261                 default:
 262                         obstack_1grow(obst, *c);
 263                         break;
 264                 }
 265         }
 266 #endif
 267 }
 268
 269 static const char *type_to_string(type_t *type)
 270 {
 271         assert(type->kind == TYPE_ATOMIC);
 272         return get_atomic_kind_name(type->atomic.akind);
 273 }
 274
 275 static FILE *preprocess(const char *fname, filetype_t filetype)
 276 {
 277         static const char *common_flags = NULL;
 278
 279         if (common_flags == NULL) {
 280                 obstack_1grow(&cppflags_obst, '\0');
 281                 const char *flags = obstack_finish(&cppflags_obst);
 282
 283                 /* setup default defines */
 284                 add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 285                 add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 286                 add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 287                 add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 288
 289                 add_flag(&cppflags_obst, "-U__VERSION__");
 290                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 291
 292                 if (flags[0] != '\0') {
 293                         size_t len = strlen(flags);
 294                         obstack_1grow(&cppflags_obst, ' ');
 295                         obstack_grow(&cppflags_obst, flags, len);
 296                 }
 297                 obstack_1grow(&cppflags_obst, '\0');
 298                 common_flags = obstack_finish(&cppflags_obst);
 299         }
 300
 301         assert(obstack_object_size(&cppflags_obst) == 0);
 302
 303         const char *preprocessor = getenv("CPARSER_PP");
 304         if (preprocessor != NULL) {
 305                 obstack_printf(&cppflags_obst, "%s ", preprocessor);
 306         } else {
 307                 if (target_triple != NULL)
 308                         obstack_printf(&cppflags_obst, "%s-", target_triple);
 309                 obstack_printf(&cppflags_obst, PREPROCESSOR);
 310         }
 311
 312         switch (filetype) {
 313         case FILETYPE_C:
 314                 add_flag(&cppflags_obst, "-std=c99");
 315                 break;
 316         case FILETYPE_CXX:
 317                 add_flag(&cppflags_obst, "-std=c++98");
 318                 break;
 319         case FILETYPE_ASSEMBLER:
 320                 add_flag(&cppflags_obst, "-x");
 321                 add_flag(&cppflags_obst, "assembler-with-cpp");
 322                 break;
 323         default:
 324                 break;
 325         }
 326         obstack_printf(&cppflags_obst, "%s", common_flags);
 327
 328         /* handle dependency generation */
 329         if (dep_target[0] != '\0') {
 330                 add_flag(&cppflags_obst, "-MF");
 331                 add_flag(&cppflags_obst, dep_target);
 332                 if (outname != NULL) {
 333                                 add_flag(&cppflags_obst, "-MQ");
 334                                 add_flag(&cppflags_obst, outname);
 335                 }
 336         }
 337         add_flag(&cppflags_obst, fname);
 338
 339         obstack_1grow(&cppflags_obst, '\0');
 340         char *buf = obstack_finish(&cppflags_obst);
 341         if (verbose) {
 342                 puts(buf);
 343         }
 344
 345         FILE *f = popen(buf, "r");
 346         if (f == NULL) {
 347                 fprintf(stderr, "invoking preprocessor failed\n");
 348                 exit(EXIT_FAILURE);
 349         }
 350
 351         /* we don't really need that anymore */
 352         obstack_free(&cppflags_obst, buf);
 353
 354         return f;
 355 }
 356
 357 static void assemble(const char *out, const char *in)
 358 {
 359         struct obstack asflags_obst;
 360         char *buf;
 361
 362         obstack_init(&asflags_obst);
 363
 364         const char *assembler = getenv("CPARSER_AS");
 365         if (assembler != NULL) {
 366                 obstack_printf(&asflags_obst, "%s ", assembler);
 367         } else {
 368                 if (target_triple != NULL)
 369                         obstack_printf(&asflags_obst, "%s-", target_triple);
 370                 obstack_printf(&asflags_obst, "%s ", ASSEMBLER);
 371         }
 372
 373         obstack_printf(&asflags_obst, "%s -o %s", in, out);
 374         obstack_1grow(&asflags_obst, '\0');
 375         buf = obstack_finish(&asflags_obst);
 376
 377         if (verbose) {
 378                 puts(buf);
 379         }
 380
 381         int err = system(buf);
 382         if (err != 0) {
 383                 fprintf(stderr, "assembler reported an error\n");
 384                 exit(EXIT_FAILURE);
 385         }
 386
 387         obstack_free(&asflags_obst, NULL);
 388 }
 389
 390 static void print_file_name(const char *file)
 391 {
 392         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 393
 394         obstack_1grow(&ldflags_obst, '\0');
 395         const char *flags = obstack_finish(&ldflags_obst);
 396
 397         /* construct commandline */
 398         const char *linker = getenv("CPARSER_LINK");
 399         if (linker != NULL) {
 400                 obstack_printf(&ldflags_obst, "%s ", linker);
 401         } else {
 402                 if (target_triple != NULL)
 403                         obstack_printf(&ldflags_obst, "%s-", target_triple);
 404                 obstack_printf(&ldflags_obst, "%s ", LINKER);
 405         }
 406         obstack_printf(&ldflags_obst, "%s ", linker);
 407         obstack_printf(&ldflags_obst, "%s", flags);
 408         obstack_1grow(&ldflags_obst, '\0');
 409
 410         char *commandline = obstack_finish(&ldflags_obst);
 411
 412         if (verbose) {
 413                 puts(commandline);
 414         }
 415         int err = system(commandline);
 416         if (err != EXIT_SUCCESS) {
 417                 fprintf(stderr, "linker reported an error\n");
 418                 exit(EXIT_FAILURE);
 419         }
 420 }
 421
 422 static const char *try_dir(const char *dir)
 423 {
 424         if (dir == NULL)
 425                 return dir;
 426         if (access(dir, R_OK | W_OK | X_OK) == 0)
 427                 return dir;
 428         return NULL;
 429 }
 430
 431 static const char *get_tempdir(void)
 432 {
 433         static const char *tmpdir = NULL;
 434
 435         if (tmpdir != NULL)
 436                 return tmpdir;
 437
 438         if (tmpdir == NULL)
 439                 tmpdir = try_dir(getenv("TMPDIR"));
 440         if (tmpdir == NULL)
 441                 tmpdir = try_dir(getenv("TMP"));
 442         if (tmpdir == NULL)
 443                 tmpdir = try_dir(getenv("TEMP"));
 444
 445 #ifdef P_tmpdir
 446         if (tmpdir == NULL)
 447                 tmpdir = try_dir(P_tmpdir);
 448 #endif
 449
 450         if (tmpdir == NULL)
 451                 tmpdir = try_dir("/var/tmp");
 452         if (tmpdir == NULL)
 453                 tmpdir = try_dir("/usr/tmp");
 454         if (tmpdir == NULL)
 455                 tmpdir = try_dir("/tmp");
 456
 457         if (tmpdir == NULL)
 458                 tmpdir = ".";
 459
 460         return tmpdir;
 461 }
 462
 463 #ifndef HAVE_MKSTEMP
 464 /* cheap and nasty mkstemp replacement */
 465 static int mkstemp(char *templ)
 466 {
 467         mktemp(templ);
 468         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 469 }
 470 #endif
 471
 472 /**
 473  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 474  * during linking (like glibc/gnu ld do for tmpnam)...
 475  */
 476 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 477 {
 478         const char *tempdir = get_tempdir();
 479
 480         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 481
 482         int fd = mkstemp(buffer);
 483         if (fd == -1) {
 484                 fprintf(stderr, "couldn't create temporary file: %s\n",
 485                         strerror(errno));
 486                 exit(EXIT_FAILURE);
 487         }
 488         FILE *out = fdopen(fd, "w");
 489         if (out == NULL) {
 490                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 491                 exit(EXIT_FAILURE);
 492         }
 493
 494         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 495         memset(entry, 0, sizeof(*entry));
 496
 497         size_t  name_len = strlen(buffer) + 1;
 498         char   *name     = malloc(name_len);
 499         memcpy(name, buffer, name_len);
 500         entry->name      = name;
 501
 502         entry->next = temp_files;
 503         temp_files  = entry;
 504
 505         return out;
 506 }
 507
 508 static void free_temp_files(void)
 509 {
 510         file_list_entry_t *entry = temp_files;
 511         file_list_entry_t *next;
 512         for ( ; entry != NULL; entry = next) {
 513                 next = entry->next;
 514
 515                 unlink(entry->name);
 516                 free((char*) entry->name);
 517                 free(entry);
 518         }
 519         temp_files = NULL;
 520 }
 521
 522 /**
 523  * Do the necessary lowering for compound parameters.
 524  */
 525 void lower_compound_params(void)
 526 {
 527         lower_params_t params;
 528
 529         params.def_ptr_alignment    = 4;
 530         params.flags                = LF_COMPOUND_RETURN | LF_RETURN_HIDDEN;
 531         params.hidden_params        = ADD_HIDDEN_ALWAYS_IN_FRONT;
 532         params.find_pointer_type    = NULL;
 533         params.ret_compound_in_regs = NULL;
 534         lower_calls_with_compounds(&params);
 535 }
 536
 537 typedef enum compile_mode_t {
 538         BenchmarkParser,
 539         PreprocessOnly,
 540         ParseOnly,
 541         Compile,
 542         CompileDump,
 543         CompileExportIR,
 544         CompileAssemble,
 545         CompileAssembleLink,
 546         LexTest,
 547         PrintAst,
 548         PrintFluffy,
 549         PrintCaml,
 550         PrintJna
 551 } compile_mode_t;
 552
 553 static void usage(const char *argv0)
 554 {
 555         fprintf(stderr, "Usage %s [options] input [-o output]\n", argv0);
 556 }
 557
 558 static void print_cparser_version(void)
 559 {
 560         printf("cparser (%s) using libFirm (%u.%u",
 561                cparser_REVISION, ir_get_version_major(),
 562                ir_get_version_minor());
 563
 564         const char *revision = ir_get_version_revision();
 565         if (revision[0] != 0) {
 566                 putchar(' ');
 567                 fputs(revision, stdout);
 568         }
 569
 570         const char *build = ir_get_version_build();
 571         if (build[0] != 0) {
 572                 putchar(' ');
 573                 fputs(build, stdout);
 574         }
 575         puts(")");
 576         puts("This is free software; see the source for copying conditions.  There is NO\n"
 577              "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
 578 }
 579
 580 static void print_help(const char *argv0)
 581 {
 582         usage(argv0);
 583         puts("");
 584         puts("\t-fhelp     Display help about firm optimisation options");
 585         puts("\t-bhelp     Display help about firm backend options");
 586         puts("A big number of gcc flags is also supported");
 587 }
 588
 589 static void set_be_option(const char *arg)
 590 {
 591         int res = be_parse_arg(arg);
 592         (void) res;
 593         assert(res);
 594 }
 595
 596 static void set_option(const char *arg)
 597 {
 598         int res = firm_option(arg);
 599         (void) res;
 600         assert(res);
 601 }
 602
 603 static void copy_file(FILE *dest, FILE *input)
 604 {
 605         char buf[16384];
 606
 607         while (!feof(input) && !ferror(dest)) {
 608                 size_t read = fread(buf, 1, sizeof(buf), input);
 609                 if (fwrite(buf, 1, read, dest) != read) {
 610                         perror("couldn't write output");
 611                 }
 612         }
 613 }
 614
 615 static inline bool streq(char const* a, char const* b)
 616 {
 617         return strcmp(a, b) == 0;
 618 }
 619
 620 static inline bool strstart(char const* str, char const* start)
 621 {
 622         do {
 623                 if (*start == '\0')
 624                         return true;
 625         } while (*str++ == *start++);
 626         return false;
 627 }
 628
 629 static FILE *open_file(const char *filename)
 630 {
 631         if (streq(filename, "-")) {
 632                 return stdin;
 633         }
 634
 635         FILE *in = fopen(filename, "r");
 636         if (in == NULL) {
 637                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 638                                 strerror(errno));
 639                 exit(EXIT_FAILURE);
 640         }
 641
 642         return in;
 643 }
 644
 645 static filetype_t get_filetype_from_string(const char *string)
 646 {
 647         if (streq(string, "c") || streq(string, "c-header"))
 648                 return FILETYPE_C;
 649         if (streq(string, "c++") || streq(string, "c++-header"))
 650                 return FILETYPE_CXX;
 651         if (streq(string, "assembler"))
 652                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 653         if (streq(string, "assembler-with-cpp"))
 654                 return FILETYPE_ASSEMBLER;
 655         if (streq(string, "none"))
 656                 return FILETYPE_AUTODETECT;
 657
 658         return FILETYPE_UNKNOWN;
 659 }
 660
 661 /**
 662  * Initialize firm codegeneration for a specific operating system.
 663  * The argument is the operating system part of a target-triple */
 664 static bool set_os_support(const char *os)
 665 {
 666         wchar_atomic_kind         = ATOMIC_TYPE_INT;
 667         force_long_double_size    = 0;
 668         enable_main_collect2_hack = false;
 669
 670         if (strstr(os, "linux") != NULL || strstr(os, "bsd") != NULL
 671                         || streq(os, "solaris")) {
 672                 set_be_option("ia32-gasmode=elf");
 673                 set_create_ld_ident(create_name_linux_elf);
 674         } else if (streq(os, "darwin")) {
 675                 force_long_double_size = 16;
 676                 set_be_option("ia32-gasmode=macho");
 677                 set_be_option("ia32-stackalign=4");
 678                 set_be_option("pic=true");
 679                 set_create_ld_ident(create_name_macho);
 680         } else if (strstr(os, "mingw") != NULL || streq(os, "win32")) {
 681                 wchar_atomic_kind         = ATOMIC_TYPE_USHORT;
 682                 enable_main_collect2_hack = true;
 683                 set_be_option("ia32-gasmode=mingw");
 684                 set_create_ld_ident(create_name_win32);
 685         } else {
 686                 return false;
 687         }
 688
 689         return true;
 690 }
 691
 692 static bool parse_target_triple(const char *arg)
 693 {
 694         const char *manufacturer = strchr(arg, '-');
 695         if (manufacturer == NULL) {
 696                 fprintf(stderr, "Target-triple is not in the form 'cpu_type-manufacturer-operating_system'\n");
 697                 return false;
 698         }
 699         manufacturer += 1;
 700
 701         const char *os = strchr(manufacturer, '-');
 702         if (os == NULL) {
 703                 fprintf(stderr, "Target-triple is not in the form 'cpu_type-manufacturer-operating_system'\n");
 704                 return false;
 705         }
 706         os += 1;
 707
 708         /* Note: Triples are more or less defined by what the config.guess and
 709          * config.sub scripts from GNU autoconf emit. We have to lookup there what
 710          * triples are possible */
 711
 712         /* process cpu type */
 713         if (strstart(arg, "i386-")) {
 714                 be_parse_arg("isa=ia32");
 715                 be_parse_arg("ia32-arch=i386");
 716         } else if (strstart(arg, "i486-")) {
 717                 be_parse_arg("isa=ia32");
 718                 be_parse_arg("ia32-arch=i486");
 719         } else if (strstart(arg, "i586-")) {
 720                 be_parse_arg("isa=ia32");
 721                 be_parse_arg("ia32-arch=i586");
 722         } else if (strstart(arg, "i686-")) {
 723                 be_parse_arg("isa=ia32");
 724                 be_parse_arg("ia32-arch=i686");
 725         } else if (strstart(arg, "i786-")) {
 726                 be_parse_arg("isa=ia32");
 727                 be_parse_arg("ia32-arch=pentium4");
 728         } else if (strstart(arg, "x86_64")) {
 729                 be_parse_arg("isa=amd64");
 730         } else if (strstart(arg, "sparc-")) {
 731                 be_parse_arg("isa=sparc");
 732         } else if (strstart(arg, "arm-")) {
 733                 be_parse_arg("isa=arm");
 734         } else {
 735                 fprintf(stderr, "Unknown cpu in triple '%s'\n", arg);
 736                 return false;
 737         }
 738
 739         /* process manufacturer, alot of people incorrectly leave out the
 740          * manufacturer instead of using unknown- */
 741         if (strstart(manufacturer, "linux")) {
 742                 os = manufacturer;
 743                 manufacturer = "unknown-";
 744         }
 745
 746         /* process operating system */
 747         if (!set_os_support(os)) {
 748                 fprintf(stderr, "Unknown operating system '%s' in triple '%s'\n", os, arg);
 749                 return false;
 750         }
 751
 752         target_triple = arg;
 753         return true;
 754 }
 755
 756 int main(int argc, char **argv)
 757 {
 758         initialize_firm();
 759
 760         const char        *dumpfunction         = NULL;
 761         const char        *print_file_name_file = NULL;
 762         compile_mode_t     mode                 = CompileAssembleLink;
 763         int                opt_level            = 1;
 764         int                result               = EXIT_SUCCESS;
 765         char               cpu_arch[16]         = "ia32";
 766         file_list_entry_t *files                = NULL;
 767         file_list_entry_t *last_file            = NULL;
 768         bool               construct_dep_target = false;
 769         bool               do_timing            = false;
 770         struct obstack     file_obst;
 771
 772         atexit(free_temp_files);
 773
 774         /* hack for now... */
 775         if (strstr(argv[0], "pptest") != NULL) {
 776                 extern int pptest_main(int argc, char **argv);
 777                 return pptest_main(argc, argv);
 778         }
 779
 780         obstack_init(&cppflags_obst);
 781         obstack_init(&ldflags_obst);
 782         obstack_init(&file_obst);
 783
 784 #define GET_ARG_AFTER(def, args)                                             \
 785         def = &arg[sizeof(args)-1];                                              \
 786         if (def[0] == '\0') {                                                     \
 787                 ++i;                                                                 \
 788                 if (i >= argc) {                                                      \
 789                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 790                         argument_errors = true;                                          \
 791                         break;                                                           \
 792                 }                                                                    \
 793                 def = argv[i];                                                       \
 794                 if (def[0] == '-' && def[1] != '\0') {                                \
 795                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 796                         argument_errors = true;                                          \
 797                         continue;                                                        \
 798                 }                                                                    \
 799         }
 800
 801 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 802
 803         /* early options parsing (find out optimisation level and OS) */
 804         for (int i = 1; i < argc; ++i) {
 805                 const char *arg = argv[i];
 806                 if (arg[0] != '-')
 807                         continue;
 808
 809                 const char *option = &arg[1];
 810                 if (option[0] == 'O') {
 811                         sscanf(&option[1], "%d", &opt_level);
 812                 }
 813         }
 814
 815         /* Guess host OS */
 816 #if defined(_WIN32) || defined(__CYGWIN__)
 817         set_os_support("win32");
 818 #elif defined(__APPLE__)
 819         set_os_support("darwin");
 820 #else
 821         set_os_support("linux");
 822 #endif
 823
 824         /* apply optimisation level */
 825         switch(opt_level) {
 826         case 0:
 827                 set_option("no-opt");
 828                 break;
 829         case 1:
 830                 set_option("no-inline");
 831                 break;
 832         default:
 833         case 4:
 834                 /* use_builtins = true; */
 835                 /* fallthrough */
 836         case 3:
 837                 set_option("thread-jumps");
 838                 set_option("if-conversion");
 839                 /* fallthrough */
 840         case 2:
 841                 set_option("strict-aliasing");
 842                 set_option("inline");
 843                 set_option("deconv");
 844                 set_be_option("omitfp");
 845                 break;
 846         }
 847
 848         const char *target = getenv("TARGET");
 849         if (target != NULL)
 850                 parse_target_triple(target);
 851
 852         /* parse rest of options */
 853         standard                   = STANDARD_DEFAULT;
 854         unsigned   features_on     = 0;
 855         unsigned   features_off    = 0;
 856         filetype_t forced_filetype = FILETYPE_AUTODETECT;
 857         bool       help_displayed  = false;
 858         bool       argument_errors = false;
 859         for (int i = 1; i < argc; ++i) {
 860                 const char *arg = argv[i];
 861                 if (arg[0] == '-' && arg[1] != '\0') {
 862                         /* an option */
 863                         const char *option = &arg[1];
 864                         if (option[0] == 'o') {
 865                                 GET_ARG_AFTER(outname, "-o");
 866                         } else if (option[0] == 'g') {
 867                                 set_be_option("debuginfo=stabs");
 868                                 set_be_option("omitfp=no");
 869                                 set_be_option("ia32-nooptcc=yes");
 870                         } else if (SINGLE_OPTION('c')) {
 871                                 mode = CompileAssemble;
 872                         } else if (SINGLE_OPTION('E')) {
 873                                 mode = PreprocessOnly;
 874                         } else if (SINGLE_OPTION('S')) {
 875                                 mode = Compile;
 876                         } else if (option[0] == 'O') {
 877                                 continue;
 878                         } else if (option[0] == 'I') {
 879                                 const char *opt;
 880                                 GET_ARG_AFTER(opt, "-I");
 881                                 add_flag(&cppflags_obst, "-I%s", opt);
 882                         } else if (option[0] == 'D') {
 883                                 const char *opt;
 884                                 GET_ARG_AFTER(opt, "-D");
 885                                 add_flag(&cppflags_obst, "-D%s", opt);
 886                         } else if (option[0] == 'U') {
 887                                 const char *opt;
 888                                 GET_ARG_AFTER(opt, "-U");
 889                                 add_flag(&cppflags_obst, "-U%s", opt);
 890                         } else if (option[0] == 'l') {
 891                                 const char *opt;
 892                                 GET_ARG_AFTER(opt, "-l");
 893                                 add_flag(&ldflags_obst, "-l%s", opt);
 894                         } else if (option[0] == 'L') {
 895                                 const char *opt;
 896                                 GET_ARG_AFTER(opt, "-L");
 897                                 add_flag(&ldflags_obst, "-L%s", opt);
 898                         } else if (SINGLE_OPTION('v')) {
 899                                 verbose = 1;
 900                         } else if (SINGLE_OPTION('w')) {
 901                                 memset(&warning, 0, sizeof(warning));
 902                         } else if (option[0] == 'x') {
 903                                 const char *opt;
 904                                 GET_ARG_AFTER(opt, "-x");
 905                                 forced_filetype = get_filetype_from_string(opt);
 906                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 907                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 908                                         argument_errors = true;
 909                                 }
 910                         } else if (streq(option, "M")) {
 911                                 mode = PreprocessOnly;
 912                                 add_flag(&cppflags_obst, "-M");
 913                         } else if (streq(option, "MMD") ||
 914                                    streq(option, "MD")) {
 915                             construct_dep_target = true;
 916                                 add_flag(&cppflags_obst, "-%s", option);
 917                         } else if (streq(option, "MM")  ||
 918                                    streq(option, "MP")) {
 919                                 add_flag(&cppflags_obst, "-%s", option);
 920                         } else if (streq(option, "MT") ||
 921                                    streq(option, "MQ") ||
 922                                    streq(option, "MF")) {
 923                                 const char *opt;
 924                                 GET_ARG_AFTER(opt, "-MT");
 925                                 add_flag(&cppflags_obst, "-%s", option);
 926                                 add_flag(&cppflags_obst, "%s", opt);
 927                         } else if (streq(option, "include")) {
 928                                 const char *opt;
 929                                 GET_ARG_AFTER(opt, "-include");
 930                                 add_flag(&cppflags_obst, "-include");
 931                                 add_flag(&cppflags_obst, "%s", opt);
 932                         } else if (streq(option, "isystem")) {
 933                                 const char *opt;
 934                                 GET_ARG_AFTER(opt, "-isystem");
 935                                 add_flag(&cppflags_obst, "-isystem");
 936                                 add_flag(&cppflags_obst, "%s", opt);
 937 #if defined(linux) || defined(__linux) || defined(__linux__) || defined(__CYGWIN__)
 938                         } else if (streq(option, "pthread")) {
 939                                 /* set flags for the preprocessor */
 940                                 add_flag(&cppflags_obst, "-D_REENTRANT");
 941                                 /* set flags for the linker */
 942                                 add_flag(&ldflags_obst, "-lpthread");
 943 #endif
 944                         } else if (streq(option, "nostdinc")
 945                                         || streq(option, "trigraphs")) {
 946                                 /* pass these through to the preprocessor */
 947                                 add_flag(&cppflags_obst, "%s", arg);
 948                         } else if (streq(option, "pipe")) {
 949                                 /* here for gcc compatibility */
 950                         } else if (option[0] == 'f') {
 951                                 char const *orig_opt;
 952                                 GET_ARG_AFTER(orig_opt, "-f");
 953
 954                                 if (strstart(orig_opt, "input-charset=")) {
 955                                         char const* const encoding = strchr(orig_opt, '=') + 1;
 956                                         select_input_encoding(encoding);
 957                                 } else if (streq(orig_opt, "verbose-asm")) {
 958                                         /* ignore: we always print verbose assembler */
 959                                 } else {
 960                                         char const *opt         = orig_opt;
 961                                         bool        truth_value = true;
 962                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
 963                                                 truth_value = false;
 964                                                 opt += 3;
 965                                         }
 966
 967                                         if (streq(opt, "builtins")) {
 968                                                 use_builtins = truth_value;
 969                                         } else if (streq(opt, "dollars-in-identifiers")) {
 970                                                 allow_dollar_in_symbol = truth_value;
 971                                         } else if (streq(opt, "omit-frame-pointer")) {
 972                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
 973                                         } else if (streq(opt, "short-wchar")) {
 974                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
 975                                                         : ATOMIC_TYPE_INT;
 976                                         } else if (streq(opt, "signed-char")) {
 977                                                 char_is_signed = truth_value;
 978                                         } else if (streq(opt, "strength-reduce")) {
 979                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
 980                                         } else if (streq(opt, "syntax-only")) {
 981                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
 982                                         } else if (streq(opt, "unsigned-char")) {
 983                                                 char_is_signed = !truth_value;
 984                                         } else if (streq(opt, "freestanding")) {
 985                                                 freestanding = true;
 986                                         } else if (streq(opt, "hosted")) {
 987                                                 freestanding = false;
 988                                         } else if (truth_value == false &&
 989                                                    streq(opt, "asynchronous-unwind-tables")) {
 990                                             /* nothing todo, a gcc feature which we don't support
 991                                              * anyway was deactivated */
 992                                         } else if (strstart(orig_opt, "align-loops=") ||
 993                                                         strstart(orig_opt, "align-jumps=") ||
 994                                                         strstart(orig_opt, "align-functions=")) {
 995                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
 996                                         } else if (strstart(orig_opt, "message-length=")) {
 997                                                         /* ignore: would only affect error message format */
 998                                         } else if (streq(opt, "fast-math")               ||
 999                                                    streq(opt, "jump-tables")             ||
1000                                                    streq(opt, "expensive-optimizations") ||
1001                                                    streq(opt, "common")                  ||
1002                                                    streq(opt, "optimize-sibling-calls")  ||
1003                                                    streq(opt, "align-loops")             ||
1004                                                    streq(opt, "align-jumps")             ||
1005                                                    streq(opt, "align-functions")         ||
1006                                                    streq(opt, "PIC")) {
1007                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
1008                                         } else {
1009                                                 int res = firm_option(orig_opt);
1010                                                 if (res == 0) {
1011                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
1012                                                                 orig_opt);
1013                                                         argument_errors = true;
1014                                                         continue;
1015                                                 } else if (res == -1) {
1016                                                         help_displayed = true;
1017                                                 }
1018                                         }
1019                                 }
1020                         } else if (option[0] == 'b') {
1021                                 const char *opt;
1022                                 GET_ARG_AFTER(opt, "-b");
1023                                 int res = be_parse_arg(opt);
1024                                 if (res == 0) {
1025                                         fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
1026                                                 opt);
1027                                         argument_errors = true;
1028                                 } else if (res == -1) {
1029                                         help_displayed = true;
1030                                 } else if (strstart(opt, "isa=")) {
1031                                         strncpy(cpu_arch, opt, sizeof(cpu_arch));
1032                                 }
1033                         } else if (option[0] == 'W') {
1034                                 if (option[1] == '\0') {
1035                                         /* ignore -W, our defaults are already quite verbose */
1036                                 } else if (strstart(option + 1, "p,")) {
1037                                         // pass options directly to the preprocessor
1038                                         const char *opt;
1039                                         GET_ARG_AFTER(opt, "-Wp,");
1040                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
1041                                 } else if (strstart(option + 1, "l,")) {
1042                                         // pass options directly to the linker
1043                                         const char *opt;
1044                                         GET_ARG_AFTER(opt, "-Wl,");
1045                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
1046                                 } else if (streq(option + 1, "no-trigraphs")
1047                                                         || streq(option + 1, "undef")) {
1048                                         add_flag(&cppflags_obst, "%s", arg);
1049                                 } else {
1050                                         set_warning_opt(&option[1]);
1051                                 }
1052                         } else if (option[0] == 'm') {
1053                                 /* -m options */
1054                                 const char *opt;
1055                                 char arch_opt[64];
1056
1057                                 GET_ARG_AFTER(opt, "-m");
1058                                 if (strstart(opt, "target=")) {
1059                                         GET_ARG_AFTER(opt, "-mtarget=");
1060                                         if (!parse_target_triple(opt))
1061                                                 argument_errors = true;
1062                                 } else if (strstart(opt, "triple=")) {
1063                                         GET_ARG_AFTER(opt, "-mtriple=");
1064                                         if (!parse_target_triple(opt))
1065                                                 argument_errors = true;
1066                                 } else if (strstart(opt, "arch=")) {
1067                                         GET_ARG_AFTER(opt, "-march=");
1068                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1069                                         int res = be_parse_arg(arch_opt);
1070                                         if (res == 0) {
1071                                                 fprintf(stderr, "Unknown architecture '%s'\n", arch_opt);
1072                                                 argument_errors = true;
1073                                         } else {
1074                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1075                                                 int res = be_parse_arg(arch_opt);
1076                                                 if (res == 0)
1077                                                         argument_errors = true;
1078                                         }
1079                                 } else if (strstart(opt, "tune=")) {
1080                                         GET_ARG_AFTER(opt, "-mtune=");
1081                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1082                                         int res = be_parse_arg(arch_opt);
1083                                         if (res == 0)
1084                                                 argument_errors = true;
1085                                 } else if (strstart(opt, "cpu=")) {
1086                                         GET_ARG_AFTER(opt, "-mcpu=");
1087                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1088                                         int res = be_parse_arg(arch_opt);
1089                                         if (res == 0)
1090                                                 argument_errors = true;
1091                                 } else if (strstart(opt, "fpmath=")) {
1092                                         GET_ARG_AFTER(opt, "-mfpmath=");
1093                                         if (streq(opt, "387"))
1094                                                 opt = "x87";
1095                                         else if (streq(opt, "sse"))
1096                                                 opt = "sse2";
1097                                         else {
1098                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
1099                                                 argument_errors = true;
1100                                         }
1101                                         if (!argument_errors) {
1102                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
1103                                                 int res = be_parse_arg(arch_opt);
1104                                                 if (res == 0)
1105                                                         argument_errors = true;
1106                                         }
1107                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
1108                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
1109                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
1110                                         int res = be_parse_arg(arch_opt);
1111                                         if (res == 0)
1112                                                 argument_errors = true;
1113                                 } else if (streq(opt, "omit-leaf-frame-pointer")) {
1114                                         set_be_option("omitleaffp=1");
1115                                 } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
1116                                         set_be_option("omitleaffp=0");
1117                                 } else if (streq(opt, "rtd")) {
1118                                         default_calling_convention = CC_STDCALL;
1119                                 } else if (strstart(opt, "regparm=")) {
1120                                         fprintf(stderr, "error: regparm convention not supported yet\n");
1121                                         argument_errors = true;
1122                                 } else if (streq(opt, "soft-float")) {
1123                                         fprintf(stderr, "error: software floatingpoint not supported yet\n");
1124                                         argument_errors = true;
1125                                 } else {
1126                                         char *endptr;
1127                                         long int value = strtol(opt, &endptr, 10);
1128                                         if (*endptr != '\0') {
1129                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
1130                                                 argument_errors = true;
1131                                         }
1132                                         if (value != 16 && value != 32 && value != 64) {
1133                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
1134                                                 argument_errors = true;
1135                                         } else {
1136                                                 machine_size = (unsigned int)value;
1137                                         }
1138                                 }
1139                         } else if (streq(option, "pg")) {
1140                                 set_be_option("gprof");
1141                                 add_flag(&ldflags_obst, "-pg");
1142                         } else if (streq(option, "pedantic") ||
1143                                    streq(option, "ansi")) {
1144                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1145                         } else if (streq(option, "shared")) {
1146                                 add_flag(&ldflags_obst, "-shared");
1147                         } else if (strstart(option, "std=")) {
1148                                 const char *const o = &option[4];
1149                                 standard =
1150                                         streq(o, "c++")            ? STANDARD_CXX98   :
1151                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1152                                         streq(o, "c89")            ? STANDARD_C89     :
1153                                         streq(o, "c99")            ? STANDARD_C99     :
1154                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1155                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1156                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1157                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1158                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1159                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1160                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1161                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1162                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1163                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1164                         } else if (streq(option, "version")) {
1165                                 print_cparser_version();
1166                         } else if (strstart(option, "print-file-name=")) {
1167                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1168                         } else if (option[0] == '-') {
1169                                 /* double dash option */
1170                                 ++option;
1171                                 if (streq(option, "gcc")) {
1172                                         features_on  |=  _GNUC;
1173                                         features_off &= ~_GNUC;
1174                                 } else if (streq(option, "no-gcc")) {
1175                                         features_on  &= ~_GNUC;
1176                                         features_off |=  _GNUC;
1177                                 } else if (streq(option, "ms")) {
1178                                         features_on  |=  _MS;
1179                                         features_off &= ~_MS;
1180                                 } else if (streq(option, "no-ms")) {
1181                                         features_on  &= ~_MS;
1182                                         features_off |=  _MS;
1183                                 } else if (streq(option, "strict")) {
1184                                         strict_mode = true;
1185                                 } else if (streq(option, "lextest")) {
1186                                         mode = LexTest;
1187                                 } else if (streq(option, "benchmark")) {
1188                                         mode = BenchmarkParser;
1189                                 } else if (streq(option, "print-ast")) {
1190                                         mode = PrintAst;
1191                                 } else if (streq(option, "print-implicit-cast")) {
1192                                         print_implicit_casts = true;
1193                                 } else if (streq(option, "print-parenthesis")) {
1194                                         print_parenthesis = true;
1195                                 } else if (streq(option, "print-fluffy")) {
1196                                         mode = PrintFluffy;
1197                                 } else if (streq(option, "print-caml")) {
1198                                         mode = PrintCaml;
1199                                 } else if (streq(option, "print-jna")) {
1200                                         mode = PrintJna;
1201                                 } else if (streq(option, "jna-limit")) {
1202                                         ++i;
1203                                         if (i >= argc) {
1204                                                 fprintf(stderr, "error: "
1205                                                         "expected argument after '--jna-limit'\n");
1206                                                 argument_errors = true;
1207                                                 break;
1208                                         }
1209                                         jna_limit_output(argv[i]);
1210                                 } else if (streq(option, "jna-libname")) {
1211                                         ++i;
1212                                         if (i >= argc) {
1213                                                 fprintf(stderr, "error: "
1214                                                         "expected argument after '--jna-libname'\n");
1215                                                 argument_errors = true;
1216                                                 break;
1217                                         }
1218                                         jna_set_libname(argv[i]);
1219                                 } else if (streq(option, "time")) {
1220                                         do_timing = true;
1221                                 } else if (streq(option, "version")) {
1222                                         print_cparser_version();
1223                                         return EXIT_SUCCESS;
1224                                 } else if (streq(option, "help")) {
1225                                         print_help(argv[0]);
1226                                         help_displayed = true;
1227                                 } else if (streq(option, "dump-function")) {
1228                                         ++i;
1229                                         if (i >= argc) {
1230                                                 fprintf(stderr, "error: "
1231                                                         "expected argument after '--dump-function'\n");
1232                                                 argument_errors = true;
1233                                                 break;
1234                                         }
1235                                         dumpfunction = argv[i];
1236                                         mode         = CompileDump;
1237                                 } else if (streq(option, "export-ir")) {
1238                                         mode = CompileExportIR;
1239                                 } else {
1240                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1241                                         argument_errors = true;
1242                                 }
1243                         } else {
1244                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1245                                 argument_errors = true;
1246                         }
1247                 } else {
1248                         filetype_t type = forced_filetype;
1249                         if (type == FILETYPE_AUTODETECT) {
1250                                 if (streq(arg, "-")) {
1251                                         /* - implicitly means C source file */
1252                                         type = FILETYPE_C;
1253                                 } else {
1254                                         const char *suffix = strrchr(arg, '.');
1255                                         /* Ensure there is at least one char before the suffix */
1256                                         if (suffix != NULL && suffix != arg) {
1257                                                 ++suffix;
1258                                                 type =
1259                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1260                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1261                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1262                                                         streq(suffix, "C")   ? FILETYPE_CXX                    :
1263                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1264                                                         streq(suffix, "cp")  ? FILETYPE_CXX                    :
1265                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1266                                                         streq(suffix, "CPP") ? FILETYPE_CXX                    :
1267                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1268                                                         streq(suffix, "c++") ? FILETYPE_CXX                    :
1269                                                         streq(suffix, "ii")  ? FILETYPE_CXX                    :
1270                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1271                                                         streq(suffix, "ir")  ? FILETYPE_IR                     :
1272                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1273                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1274                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1275                                                         FILETYPE_OBJECT; /* gcc behavior: unknown file extension means object file */
1276                                         }
1277                                 }
1278                         }
1279
1280                         file_list_entry_t *entry
1281                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1282                         memset(entry, 0, sizeof(entry[0]));
1283                         entry->name = arg;
1284                         entry->type = type;
1285
1286                         if (last_file != NULL) {
1287                                 last_file->next = entry;
1288                         } else {
1289                                 files = entry;
1290                         }
1291                         last_file = entry;
1292                 }
1293         }
1294
1295         if (help_displayed) {
1296                 return !argument_errors;
1297         }
1298
1299         if (print_file_name_file != NULL) {
1300                 print_file_name(print_file_name_file);
1301                 return EXIT_SUCCESS;
1302         }
1303         if (files == NULL) {
1304                 fprintf(stderr, "error: no input files specified\n");
1305                 argument_errors = true;
1306         }
1307
1308         if (argument_errors) {
1309                 usage(argv[0]);
1310                 return EXIT_FAILURE;
1311         }
1312
1313         /* we do the lowering in ast2firm */
1314         firm_opt.lower_bitfields = FALSE;
1315
1316         /* set the c_mode here, types depends on it */
1317         c_mode |= features_on;
1318         c_mode &= ~features_off;
1319
1320         gen_firm_init();
1321         byte_order_big_endian = be_get_backend_param()->byte_order_big_endian;
1322         init_symbol_table();
1323         init_types();
1324         init_typehash();
1325         init_basic_types();
1326         init_lexer();
1327         init_ast();
1328         init_parser();
1329         init_ast2firm();
1330         init_mangle();
1331
1332         if (do_timing)
1333                 timer_init();
1334
1335         if (construct_dep_target) {
1336                 if (outname != 0 && strlen(outname) >= 2) {
1337                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1338                 } else {
1339                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1340                 }
1341         } else {
1342                 dep_target[0] = '\0';
1343         }
1344
1345         char outnamebuf[4096];
1346         if (outname == NULL) {
1347                 const char *filename = files->name;
1348
1349                 switch(mode) {
1350                 case BenchmarkParser:
1351                 case PrintAst:
1352                 case PrintFluffy:
1353                 case PrintCaml:
1354                 case PrintJna:
1355                 case LexTest:
1356                 case PreprocessOnly:
1357                 case ParseOnly:
1358                         outname = "-";
1359                         break;
1360                 case Compile:
1361                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1362                         outname = outnamebuf;
1363                         break;
1364                 case CompileAssemble:
1365                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1366                         outname = outnamebuf;
1367                         break;
1368                 case CompileDump:
1369                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1370                                         ".vcg");
1371                         outname = outnamebuf;
1372                         break;
1373                 case CompileExportIR:
1374                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
1375                         outname = outnamebuf;
1376                         break;
1377                 case CompileAssembleLink:
1378 #ifdef _WIN32
1379                         outname = "a.exe";
1380 #else
1381                         outname = "a.out";
1382 #endif
1383                         break;
1384                 }
1385         }
1386
1387         assert(outname != NULL);
1388
1389         FILE *out;
1390         if (streq(outname, "-")) {
1391                 out = stdout;
1392         } else {
1393                 out = fopen(outname, "w");
1394                 if (out == NULL) {
1395                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1396                                         strerror(errno));
1397                         return EXIT_FAILURE;
1398                 }
1399         }
1400
1401         file_list_entry_t *file;
1402         bool               already_constructed_firm = false;
1403         for (file = files; file != NULL; file = file->next) {
1404                 char        asm_tempfile[1024];
1405                 const char *filename = file->name;
1406                 filetype_t  filetype = file->type;
1407
1408                 if (filetype == FILETYPE_OBJECT)
1409                         continue;
1410
1411                 FILE *in = NULL;
1412                 if (mode == LexTest) {
1413                         if (in == NULL)
1414                                 in = open_file(filename);
1415                         lextest(in, filename);
1416                         fclose(in);
1417                         return EXIT_SUCCESS;
1418                 }
1419
1420                 FILE *preprocessed_in = NULL;
1421                 filetype_t next_filetype = filetype;
1422                 switch (filetype) {
1423                         case FILETYPE_C:
1424                                 next_filetype = FILETYPE_PREPROCESSED_C;
1425                                 goto preprocess;
1426                         case FILETYPE_CXX:
1427                                 next_filetype = FILETYPE_PREPROCESSED_CXX;
1428                                 goto preprocess;
1429                         case FILETYPE_ASSEMBLER:
1430                                 next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1431                                 goto preprocess;
1432 preprocess:
1433                                 /* no support for input on FILE* yet */
1434                                 if (in != NULL)
1435                                         panic("internal compiler error: in for preprocessor != NULL");
1436
1437                                 preprocessed_in = preprocess(filename, filetype);
1438                                 if (mode == PreprocessOnly) {
1439                                         copy_file(out, preprocessed_in);
1440                                         int result = pclose(preprocessed_in);
1441                                         fclose(out);
1442                                         /* remove output file in case of error */
1443                                         if (out != stdout && result != EXIT_SUCCESS) {
1444                                                 unlink(outname);
1445                                         }
1446                                         return result;
1447                                 }
1448
1449                                 in = preprocessed_in;
1450                                 filetype = next_filetype;
1451                                 break;
1452
1453                         default:
1454                                 break;
1455                 }
1456
1457                 FILE *asm_out;
1458                 if (mode == Compile) {
1459                         asm_out = out;
1460                 } else {
1461                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1462                 }
1463
1464                 if (in == NULL)
1465                         in = open_file(filename);
1466
1467                 /* preprocess and compile */
1468                 if (filetype == FILETYPE_PREPROCESSED_C) {
1469                         char const* invalid_mode;
1470                         switch (standard) {
1471                                 case STANDARD_ANSI:
1472                                 case STANDARD_C89:   c_mode = _C89;                break;
1473                                 /* TODO determine difference between these two */
1474                                 case STANDARD_C90:   c_mode = _C89;                break;
1475                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1476                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1477
1478 default_c_warn:
1479                                         fprintf(stderr,
1480                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1481                                                         invalid_mode);
1482                                         /* FALLTHROUGH */
1483                                 case STANDARD_DEFAULT:
1484                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1485
1486                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1487                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1488                         }
1489                         goto do_parsing;
1490                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1491                         char const* invalid_mode;
1492                         switch (standard) {
1493                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1494                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1495                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1496                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1497                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1498
1499                                 case STANDARD_ANSI:
1500                                 case STANDARD_CXX98: c_mode = _CXX; break;
1501
1502 default_cxx_warn:
1503                                         fprintf(stderr,
1504                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1505                                                         invalid_mode);
1506                                 case STANDARD_DEFAULT:
1507                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1508                         }
1509
1510 do_parsing:
1511                         c_mode |= features_on;
1512                         c_mode &= ~features_off;
1513
1514                         /* do the actual parsing */
1515                         ir_timer_t *t_parsing = ir_timer_new();
1516                         timer_register(t_parsing, "Frontend: Parsing");
1517                         timer_push(t_parsing);
1518                         init_tokens();
1519                         translation_unit_t *const unit = do_parsing(in, filename);
1520                         timer_pop(t_parsing);
1521
1522                         /* prints the AST even if errors occurred */
1523                         if (mode == PrintAst) {
1524                                 print_to_file(out);
1525                                 print_ast(unit);
1526                         }
1527
1528                         if (error_count > 0) {
1529                                 /* parsing failed because of errors */
1530                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1531                                         warning_count);
1532                                 result = EXIT_FAILURE;
1533                                 continue;
1534                         } else if (warning_count > 0) {
1535                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1536                         }
1537
1538                         if (in == preprocessed_in) {
1539                                 int pp_result = pclose(preprocessed_in);
1540                                 if (pp_result != EXIT_SUCCESS) {
1541                                         /* remove output file */
1542                                         if (out != stdout)
1543                                                 unlink(outname);
1544                                         return EXIT_FAILURE;
1545                                 }
1546                         }
1547
1548                         if (mode == BenchmarkParser) {
1549                                 return result;
1550                         } else if (mode == PrintFluffy) {
1551                                 write_fluffy_decls(out, unit);
1552                                 continue;
1553                         } else if (mode == PrintCaml) {
1554                                 write_caml_decls(out, unit);
1555                                 continue;
1556                         } else if (mode == PrintJna) {
1557                                 write_jna_decls(out, unit);
1558                                 continue;
1559                         }
1560
1561                         /* build the firm graph */
1562                         ir_timer_t *t_construct = ir_timer_new();
1563                         timer_register(t_construct, "Frontend: Graph construction");
1564                         timer_push(t_construct);
1565                         if (already_constructed_firm) {
1566                                 panic("compiling multiple files/translation units not possible");
1567                         }
1568                         translation_unit_to_firm(unit);
1569                         already_constructed_firm = true;
1570                         timer_pop(t_construct);
1571
1572 graph_built:
1573                         if (mode == ParseOnly) {
1574                                 continue;
1575                         }
1576
1577                         if (mode == CompileDump) {
1578                                 /* find irg */
1579                                 ident    *id     = new_id_from_str(dumpfunction);
1580                                 ir_graph *irg    = NULL;
1581                                 int       n_irgs = get_irp_n_irgs();
1582                                 for (int i = 0; i < n_irgs; ++i) {
1583                                         ir_graph *tirg   = get_irp_irg(i);
1584                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1585                                         if (irg_id == id) {
1586                                                 irg = tirg;
1587                                                 break;
1588                                         }
1589                                 }
1590
1591                                 if (irg == NULL) {
1592                                         fprintf(stderr, "No graph for function '%s' found\n",
1593                                                 dumpfunction);
1594                                         return EXIT_FAILURE;
1595                                 }
1596
1597                                 dump_ir_graph_file(out, irg);
1598                                 fclose(out);
1599                                 return EXIT_SUCCESS;
1600                         }
1601
1602                         if (mode == CompileExportIR) {
1603                                 fclose(out);
1604                                 ir_export(outname);
1605                                 return EXIT_SUCCESS;
1606                         }
1607
1608                         gen_firm_finish(asm_out, filename, have_const_functions);
1609                         if (asm_out != out) {
1610                                 fclose(asm_out);
1611                         }
1612                 } else if (filetype == FILETYPE_IR) {
1613                         fclose(in);
1614                         ir_import(filename);
1615                         goto graph_built;
1616                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1617                         copy_file(asm_out, in);
1618                         if (in == preprocessed_in) {
1619                                 int pp_result = pclose(preprocessed_in);
1620                                 if (pp_result != EXIT_SUCCESS) {
1621                                         /* remove output in error case */
1622                                         if (out != stdout)
1623                                                 unlink(outname);
1624                                         return pp_result;
1625                                 }
1626                         }
1627                         if (asm_out != out) {
1628                                 fclose(asm_out);
1629                         }
1630                 }
1631
1632                 if (mode == Compile)
1633                         continue;
1634
1635                 /* if we're here then we have preprocessed assembly */
1636                 filename = asm_tempfile;
1637                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1638
1639                 /* assemble */
1640                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1641                         char        temp[1024];
1642                         const char *filename_o;
1643                         if (mode == CompileAssemble) {
1644                                 fclose(out);
1645                                 filename_o = outname;
1646                         } else {
1647                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1648                                 fclose(tempf);
1649                                 filename_o = temp;
1650                         }
1651
1652                         assemble(filename_o, filename);
1653
1654                         size_t len = strlen(filename_o) + 1;
1655                         filename = obstack_copy(&file_obst, filename_o, len);
1656                         filetype = FILETYPE_OBJECT;
1657                 }
1658
1659                 /* ok we're done here, process next file */
1660                 file->name = filename;
1661                 file->type = filetype;
1662         }
1663
1664         if (result != EXIT_SUCCESS) {
1665                 if (out != stdout)
1666                         unlink(outname);
1667                 return result;
1668         }
1669
1670         /* link program file */
1671         if (mode == CompileAssembleLink) {
1672                 obstack_1grow(&ldflags_obst, '\0');
1673                 const char *flags = obstack_finish(&ldflags_obst);
1674
1675                 /* construct commandline */
1676                 const char *linker = getenv("CPARSER_LINK");
1677                 if (linker != NULL) {
1678                         obstack_printf(&file_obst, "%s ", linker);
1679                 } else {
1680                         if (target_triple != NULL)
1681                                 obstack_printf(&file_obst, "%s-", target_triple);
1682                         obstack_printf(&file_obst, "%s ", LINKER);
1683                 }
1684
1685                 for (file_list_entry_t *entry = files; entry != NULL;
1686                                 entry = entry->next) {
1687                         if (entry->type != FILETYPE_OBJECT)
1688                                 continue;
1689
1690                         add_flag(&file_obst, "%s", entry->name);
1691                 }
1692
1693                 add_flag(&file_obst, "-o");
1694                 add_flag(&file_obst, outname);
1695                 obstack_printf(&file_obst, "%s", flags);
1696                 obstack_1grow(&file_obst, '\0');
1697
1698                 char *commandline = obstack_finish(&file_obst);
1699
1700                 if (verbose) {
1701                         puts(commandline);
1702                 }
1703                 int err = system(commandline);
1704                 if (err != EXIT_SUCCESS) {
1705                         fprintf(stderr, "linker reported an error\n");
1706                         return EXIT_FAILURE;
1707                 }
1708         }
1709
1710         if (do_timing)
1711                 timer_term(stderr);
1712
1713         obstack_free(&cppflags_obst, NULL);
1714         obstack_free(&ldflags_obst, NULL);
1715         obstack_free(&file_obst, NULL);
1716
1717         exit_mangle();
1718         exit_ast2firm();
1719         exit_parser();
1720         exit_ast();
1721         exit_lexer();
1722         exit_typehash();
1723         exit_types();
1724         exit_tokens();
1725         exit_symbol_table();
1726         return EXIT_SUCCESS;
1727 }