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 "driver/firm_machine.h"
  76 #include "adt/error.h"
  77 #include "adt/strutil.h"
  78 #include "wrappergen/write_fluffy.h"
  79 #include "wrappergen/write_jna.h"
  80 #include "revision.h"
  81 #include "warning.h"
  82 #include "help.h"
  83 #include "mangle.h"
  84 #include "printer.h"
  85
  86 #ifndef PREPROCESSOR
  87 #ifndef __WIN32__
  88 #define PREPROCESSOR "gcc -E -U__STRICT_ANSI__"
  89 #else
  90 #define PREPROCESSOR "cpp -U__STRICT_ANSI__"
  91 #endif
  92 #endif
  93
  94 #ifndef LINKER
  95 #define LINKER    "gcc"
  96 #endif
  97
  98 #ifndef ASSEMBLER
  99 #define ASSEMBLER "gcc -c -xassembler"
 100 #endif
 101
 102 unsigned int       c_mode                    = _C89 | _ANSI | _C99 | _GNUC;
 103 unsigned int       machine_size              = 32;
 104 bool               byte_order_big_endian     = false;
 105 bool               char_is_signed            = true;
 106 bool               strict_mode               = false;
 107 bool               use_builtins              = false;
 108 atomic_type_kind_t wchar_atomic_kind         = ATOMIC_TYPE_INT;
 109 unsigned           force_long_double_size    = 0;
 110 bool               enable_main_collect2_hack = false;
 111 bool               freestanding              = false;
 112
 113 static machine_triple_t *target_machine;
 114 static const char       *target_triple;
 115 static int               verbose;
 116 static struct obstack    cppflags_obst;
 117 static struct obstack    ldflags_obst;
 118 static struct obstack    asflags_obst;
 119 static char              dep_target[1024];
 120 static const char       *outname;
 121 static bool              define_intmax_types;
 122
 123 typedef enum lang_standard_t {
 124         STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
 125         STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
 126         STANDARD_C89,     /* ISO C90 (sic) */
 127         STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
 128         STANDARD_C99,     /* ISO C99 */
 129         STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
 130         STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
 131         STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
 132         STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
 133 } lang_standard_t;
 134
 135 static lang_standard_t standard;
 136
 137 typedef struct file_list_entry_t file_list_entry_t;
 138
 139 typedef enum filetype_t {
 140         FILETYPE_AUTODETECT,
 141         FILETYPE_C,
 142         FILETYPE_PREPROCESSED_C,
 143         FILETYPE_CXX,
 144         FILETYPE_PREPROCESSED_CXX,
 145         FILETYPE_ASSEMBLER,
 146         FILETYPE_PREPROCESSED_ASSEMBLER,
 147         FILETYPE_OBJECT,
 148         FILETYPE_IR,
 149         FILETYPE_UNKNOWN
 150 } filetype_t;
 151
 152 struct file_list_entry_t {
 153         const char  *name; /**< filename or NULL for stdin */
 154         filetype_t   type;
 155         file_list_entry_t *next;
 156 };
 157
 158 static file_list_entry_t *temp_files;
 159
 160 static void get_output_name(char *buf, size_t buflen, const char *inputname,
 161                             const char *newext)
 162 {
 163         if (inputname == NULL)
 164                 inputname = "a";
 165
 166         char const *const last_slash = strrchr(inputname, '/');
 167         char const *const filename   =
 168                 last_slash != NULL ? last_slash + 1 : inputname;
 169         char const *const last_dot   = strrchr(filename, '.');
 170         char const *const name_end   =
 171                 last_dot != NULL ? last_dot : strchr(filename, '\0');
 172
 173         int const len = snprintf(buf, buflen, "%.*s%s",
 174                         (int)(name_end - filename), filename, newext);
 175 #ifdef _WIN32
 176         if (len < 0 || buflen <= (size_t)len)
 177 #else
 178         if (buflen <= (size_t)len)
 179 #endif
 180                 panic("filename too long");
 181 }
 182
 183 #include "gen_builtins.h"
 184
 185 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 186 {
 187         start_parsing();
 188
 189         if (use_builtins) {
 190                 lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
 191                 parse();
 192         }
 193
 194         lexer_open_stream(in, input_name);
 195         parse();
 196
 197         translation_unit_t *unit = finish_parsing();
 198         return unit;
 199 }
 200
 201 static void lextest(FILE *in, const char *fname)
 202 {
 203         lexer_open_stream(in, fname);
 204
 205         do {
 206                 lexer_next_preprocessing_token();
 207                 print_token(stdout, &lexer_token);
 208                 putchar('\n');
 209         } while (lexer_token.type != T_EOF);
 210 }
 211
 212 static void add_flag(struct obstack *obst, const char *format, ...)
 213 {
 214         char buf[65536];
 215         va_list ap;
 216
 217         va_start(ap, format);
 218 #ifdef _WIN32
 219         int len =
 220 #endif
 221                 vsnprintf(buf, sizeof(buf), format, ap);
 222         va_end(ap);
 223
 224         obstack_1grow(obst, ' ');
 225 #ifdef _WIN32
 226         obstack_1grow(obst, '"');
 227         obstack_grow(obst, buf, len);
 228         obstack_1grow(obst, '"');
 229 #else
 230         /* escape stuff... */
 231         for (char *c = buf; *c != '\0'; ++c) {
 232                 switch(*c) {
 233                 case ' ':
 234                 case '"':
 235                 case '$':
 236                 case '&':
 237                 case '(':
 238                 case ')':
 239                 case ';':
 240                 case '<':
 241                 case '>':
 242                 case '\'':
 243                 case '\\':
 244                 case '\n':
 245                 case '\r':
 246                 case '\t':
 247                 case '`':
 248                 case '|':
 249                         obstack_1grow(obst, '\\');
 250                         /* FALLTHROUGH */
 251                 default:
 252                         obstack_1grow(obst, *c);
 253                         break;
 254                 }
 255         }
 256 #endif
 257 }
 258
 259 static const char *type_to_string(type_t *type)
 260 {
 261         assert(type->kind == TYPE_ATOMIC);
 262         return get_atomic_kind_name(type->atomic.akind);
 263 }
 264
 265 static FILE *preprocess(const char *fname, filetype_t filetype)
 266 {
 267         static const char *common_flags = NULL;
 268
 269         if (common_flags == NULL) {
 270                 obstack_1grow(&cppflags_obst, '\0');
 271                 const char *flags = obstack_finish(&cppflags_obst);
 272
 273                 /* setup default defines */
 274                 add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
 275                 add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
 276                 add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
 277                 add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
 278
 279                 add_flag(&cppflags_obst, "-U__VERSION__");
 280                 add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
 281
 282                 if (define_intmax_types) {
 283                         add_flag(&cppflags_obst, "-U__INTMAX_TYPE__");
 284                         add_flag(&cppflags_obst, "-D__INTMAX_TYPE__=%s", type_to_string(type_intmax_t));
 285                         add_flag(&cppflags_obst, "-U__UINTMAX_TYPE__");
 286                         add_flag(&cppflags_obst, "-D__UINTMAX_TYPE__=%s", type_to_string(type_uintmax_t));
 287                 }
 288
 289                 if (flags[0] != '\0') {
 290                         size_t len = strlen(flags);
 291                         obstack_1grow(&cppflags_obst, ' ');
 292                         obstack_grow(&cppflags_obst, flags, len);
 293                 }
 294                 obstack_1grow(&cppflags_obst, '\0');
 295                 common_flags = obstack_finish(&cppflags_obst);
 296         }
 297
 298         assert(obstack_object_size(&cppflags_obst) == 0);
 299
 300         const char *preprocessor = getenv("CPARSER_PP");
 301         if (preprocessor != NULL) {
 302                 obstack_printf(&cppflags_obst, "%s ", preprocessor);
 303         } else {
 304                 if (target_triple != NULL)
 305                         obstack_printf(&cppflags_obst, "%s-", target_triple);
 306                 obstack_printf(&cppflags_obst, PREPROCESSOR);
 307         }
 308
 309         switch (filetype) {
 310         case FILETYPE_C:
 311                 add_flag(&cppflags_obst, "-std=c99");
 312                 break;
 313         case FILETYPE_CXX:
 314                 add_flag(&cppflags_obst, "-std=c++98");
 315                 break;
 316         case FILETYPE_ASSEMBLER:
 317                 add_flag(&cppflags_obst, "-x");
 318                 add_flag(&cppflags_obst, "assembler-with-cpp");
 319                 break;
 320         default:
 321                 break;
 322         }
 323         obstack_printf(&cppflags_obst, "%s", common_flags);
 324
 325         /* handle dependency generation */
 326         if (dep_target[0] != '\0') {
 327                 add_flag(&cppflags_obst, "-MF");
 328                 add_flag(&cppflags_obst, dep_target);
 329                 if (outname != NULL) {
 330                                 add_flag(&cppflags_obst, "-MQ");
 331                                 add_flag(&cppflags_obst, outname);
 332                 }
 333         }
 334         add_flag(&cppflags_obst, fname);
 335         obstack_1grow(&cppflags_obst, '\0');
 336
 337         char *commandline = obstack_finish(&cppflags_obst);
 338         if (verbose) {
 339                 puts(commandline);
 340         }
 341         FILE *f = popen(commandline, "r");
 342         if (f == NULL) {
 343                 fprintf(stderr, "invoking preprocessor failed\n");
 344                 exit(EXIT_FAILURE);
 345         }
 346         /* we don't really need that anymore */
 347         obstack_free(&cppflags_obst, commandline);
 348
 349         return f;
 350 }
 351
 352 static void assemble(const char *out, const char *in)
 353 {
 354         obstack_1grow(&asflags_obst, '\0');
 355         const char *flags = obstack_finish(&asflags_obst);
 356
 357         const char *assembler = getenv("CPARSER_AS");
 358         if (assembler != NULL) {
 359                 obstack_printf(&asflags_obst, "%s", assembler);
 360         } else {
 361                 if (target_triple != NULL)
 362                         obstack_printf(&asflags_obst, "%s-", target_triple);
 363                 obstack_printf(&asflags_obst, "%s", ASSEMBLER);
 364         }
 365         if (flags[0] != '\0')
 366                 obstack_printf(&asflags_obst, " %s", flags);
 367
 368         obstack_printf(&asflags_obst, " %s -o %s", in, out);
 369         obstack_1grow(&asflags_obst, '\0');
 370
 371         char *commandline = obstack_finish(&asflags_obst);
 372         if (verbose) {
 373                 puts(commandline);
 374         }
 375         int err = system(commandline);
 376         if (err != EXIT_SUCCESS) {
 377                 fprintf(stderr, "assembler reported an error\n");
 378                 exit(EXIT_FAILURE);
 379         }
 380         obstack_free(&asflags_obst, commandline);
 381 }
 382
 383 static void print_file_name(const char *file)
 384 {
 385         add_flag(&ldflags_obst, "-print-file-name=%s", file);
 386
 387         obstack_1grow(&ldflags_obst, '\0');
 388         const char *flags = obstack_finish(&ldflags_obst);
 389
 390         /* construct commandline */
 391         const char *linker = getenv("CPARSER_LINK");
 392         if (linker != NULL) {
 393                 obstack_printf(&ldflags_obst, "%s ", linker);
 394         } else {
 395                 if (target_triple != NULL)
 396                         obstack_printf(&ldflags_obst, "%s-", target_triple);
 397                 obstack_printf(&ldflags_obst, "%s ", LINKER);
 398         }
 399         obstack_printf(&ldflags_obst, "%s ", linker);
 400         obstack_printf(&ldflags_obst, "%s", flags);
 401         obstack_1grow(&ldflags_obst, '\0');
 402
 403         char *commandline = obstack_finish(&ldflags_obst);
 404         if (verbose) {
 405                 puts(commandline);
 406         }
 407         int err = system(commandline);
 408         if (err != EXIT_SUCCESS) {
 409                 fprintf(stderr, "linker reported an error\n");
 410                 exit(EXIT_FAILURE);
 411         }
 412         obstack_free(&ldflags_obst, commandline);
 413 }
 414
 415 static const char *try_dir(const char *dir)
 416 {
 417         if (dir == NULL)
 418                 return dir;
 419         if (access(dir, R_OK | W_OK | X_OK) == 0)
 420                 return dir;
 421         return NULL;
 422 }
 423
 424 static const char *get_tempdir(void)
 425 {
 426         static const char *tmpdir = NULL;
 427
 428         if (tmpdir != NULL)
 429                 return tmpdir;
 430
 431         if (tmpdir == NULL)
 432                 tmpdir = try_dir(getenv("TMPDIR"));
 433         if (tmpdir == NULL)
 434                 tmpdir = try_dir(getenv("TMP"));
 435         if (tmpdir == NULL)
 436                 tmpdir = try_dir(getenv("TEMP"));
 437
 438 #ifdef P_tmpdir
 439         if (tmpdir == NULL)
 440                 tmpdir = try_dir(P_tmpdir);
 441 #endif
 442
 443         if (tmpdir == NULL)
 444                 tmpdir = try_dir("/var/tmp");
 445         if (tmpdir == NULL)
 446                 tmpdir = try_dir("/usr/tmp");
 447         if (tmpdir == NULL)
 448                 tmpdir = try_dir("/tmp");
 449
 450         if (tmpdir == NULL)
 451                 tmpdir = ".";
 452
 453         return tmpdir;
 454 }
 455
 456 #ifndef HAVE_MKSTEMP
 457 /* cheap and nasty mkstemp replacement */
 458 static int mkstemp(char *templ)
 459 {
 460         mktemp(templ);
 461         return open(templ, O_RDWR|O_CREAT|O_EXCL|O_BINARY, 0600);
 462 }
 463 #endif
 464
 465 /**
 466  * an own version of tmpnam, which: writes in a buffer, emits no warnings
 467  * during linking (like glibc/gnu ld do for tmpnam)...
 468  */
 469 static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 470 {
 471         const char *tempdir = get_tempdir();
 472
 473         snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 474
 475         int fd = mkstemp(buffer);
 476         if (fd == -1) {
 477                 fprintf(stderr, "couldn't create temporary file: %s\n",
 478                         strerror(errno));
 479                 exit(EXIT_FAILURE);
 480         }
 481         FILE *out = fdopen(fd, "w");
 482         if (out == NULL) {
 483                 fprintf(stderr, "couldn't create temporary file FILE*\n");
 484                 exit(EXIT_FAILURE);
 485         }
 486
 487         file_list_entry_t *entry = xmalloc(sizeof(*entry));
 488         memset(entry, 0, sizeof(*entry));
 489
 490         size_t  name_len = strlen(buffer) + 1;
 491         char   *name     = malloc(name_len);
 492         memcpy(name, buffer, name_len);
 493         entry->name      = name;
 494
 495         entry->next = temp_files;
 496         temp_files  = entry;
 497
 498         return out;
 499 }
 500
 501 static void free_temp_files(void)
 502 {
 503         file_list_entry_t *entry = temp_files;
 504         file_list_entry_t *next;
 505         for ( ; entry != NULL; entry = next) {
 506                 next = entry->next;
 507
 508                 unlink(entry->name);
 509                 free((char*) entry->name);
 510                 free(entry);
 511         }
 512         temp_files = NULL;
 513 }
 514
 515 typedef enum compile_mode_t {
 516         BenchmarkParser,
 517         PreprocessOnly,
 518         ParseOnly,
 519         Compile,
 520         CompileDump,
 521         CompileExportIR,
 522         CompileAssemble,
 523         CompileAssembleLink,
 524         LexTest,
 525         PrintAst,
 526         PrintFluffy,
 527         PrintJna
 528 } compile_mode_t;
 529
 530 static void usage(const char *argv0)
 531 {
 532         fprintf(stderr, "Usage %s [options] input [-o output]\n", argv0);
 533 }
 534
 535 static void print_cparser_version(void)
 536 {
 537         printf("cparser (%s) using libFirm (%u.%u",
 538                cparser_REVISION, ir_get_version_major(),
 539                ir_get_version_minor());
 540
 541         const char *revision = ir_get_version_revision();
 542         if (revision[0] != 0) {
 543                 putchar(' ');
 544                 fputs(revision, stdout);
 545         }
 546
 547         const char *build = ir_get_version_build();
 548         if (build[0] != 0) {
 549                 putchar(' ');
 550                 fputs(build, stdout);
 551         }
 552         puts(")");
 553         puts("This is free software; see the source for copying conditions.  There is NO\n"
 554              "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
 555 }
 556
 557 static void print_help_basic(const char *argv0)
 558 {
 559         usage(argv0);
 560         puts("");
 561         put_help("--help",                   "Display this information");
 562         put_help("--version",                "Display compiler version");
 563         put_help("--help-parser",            "Display information about parser options");
 564         put_help("--help-warnings",          "Display information about warning options");
 565         put_help("--help-codegen",           "Display information about code-generation options");
 566         put_help("--help-linker",            "Display information about linker options");
 567         put_help("--help-language-tools",    "Display information about language tools options");
 568         put_help("--help-debug",             "Display information about compiler debugging options");
 569         put_help("--help-firm",              "Display information about direct firm options");
 570         put_help("--help-all",               "Display information about all options");
 571         put_help("-c",                       "Compile and assemble but do not link");
 572         put_help("-E",                       "Preprocess only");
 573         put_help("-S",                       "Compile but do not assembler or link");
 574         put_help("-o",                       "Specify output file");
 575         put_help("-v",                       "Verbose output (show invocation of sub-processes)");
 576         put_help("-x",                       "Force input language:");
 577         put_choice("c",                      "C");
 578         put_choice("c++",                    "C++");
 579         put_choice("assembler",              "Assembler (no preprocessing)");
 580         put_choice("assembler-with-cpp",     "Assembler with preprocessing");
 581         put_choice("none",                   "Autodetection");
 582         put_help("-pipe",                    "ignored (gcc compatibility)");
 583 }
 584
 585 static void print_help_preprocessor(void)
 586 {
 587         put_help("-nostdinc",                "Do not search standard system include directories");
 588         put_help("-trigraphs",               "Support ISO C trigraphs");
 589         put_help("-isystem",                 "");
 590         put_help("-include",                 "");
 591         put_help("-I PATH",                  "");
 592         put_help("-D SYMBOL[=value]",        "");
 593         put_help("-U SYMBOL",                "");
 594         put_help("-Wp,OPTION",               "pass option directly to preprocessor");
 595         put_help("-M",                       "");
 596         put_help("-MD",                      "");
 597         put_help("-MMD",                     "");
 598         put_help("-MM",                      "");
 599         put_help("-MP",                      "");
 600         put_help("-MT",                      "");
 601         put_help("-MQ",                      "");
 602         put_help("-MF",                      "");
 603 }
 604
 605 static void print_help_parser(void)
 606 {
 607         put_help("-finput-charset=CHARSET",  "Select encoding of input files");
 608         put_help("-fmessage-length=LEN",     "ignored (gcc compatibility)");
 609         put_help("-fshort-wchar",            "wchar_t is unsigned short instead of int");
 610         put_help("-fshow-column",            "show the column number in diagnostic messages");
 611         put_help("-funsigned-char",          "char is an unsigned type");
 612         put_help("--ms",                     "Enable msvc extensions");
 613         put_help("--no-ms",                  "Disable msvc extensions");
 614         put_help("--gcc",                    "Enable gcc extensions");
 615         put_help("--no-gcc",                 "Disable gcc extensions");
 616         put_help("-std=STANDARD",            "Specify language standard:");
 617         put_choice("c99",                    "ISO C99 standard");
 618         put_choice("c89",                    "ISO C89 standard");
 619         put_choice("c9x",                    "deprecated");
 620         put_choice("c++",                    "ISO C++ 98");
 621         put_choice("c++98",                  "ISO C++ 98");
 622         put_choice("gnu99",                  "ISO C99 + GNU extensions (default)");
 623         put_choice("gnu89",                  "ISO C89 + GNU extensions");
 624         put_choice("gnu9x",                  "deprecated");
 625         put_choice("iso9899:1990",           "ISO C89");
 626         put_choice("iso9899:199409",         "ISO C90");
 627         put_choice("iso9899:1999",           "ISO C99");
 628         put_choice("iso9899:199x",           "deprecated");
 629         put_help("-pedantic",                "ignored (gcc compatibility)");
 630         put_help("-ansi",                    "ignored (gcc compatibility)");
 631         put_help("--strict",                 "Enable strict conformance checking");
 632 }
 633
 634 static void print_help_warnings(void)
 635 {
 636         put_help("-w",                       "disable all warnings");
 637         put_help("-W",                       "ignored (gcc compatibility)");
 638         put_help("-Wno-trigraphs",           "warn if input contains trigraphs");
 639         put_help("-Wundef",                  "Warn if an undefined macro is used in an #if");
 640         print_warning_opt_help();
 641 }
 642
 643 static void print_help_optimisation(void)
 644 {
 645         put_help("-O LEVEL",                 "select optimisation level (0-4)");
 646         put_help("-fexpensive-optimizations","ignored (gcc compatibility)");
 647 }
 648
 649 static void print_help_codegeneration(void)
 650 {
 651         put_help("-g",                       "Generate debug information");
 652         put_help("-pg",                      "Instrument code for gnu gprof");
 653         put_help("-fomit-frame-pointer",     "Produce code without frame pointer where possible");
 654         put_help("-ffreestanding",           "compile in freestanding mode (see ISO C standard)");
 655         put_help("-fhosted",                 "compile in hosted (not freestanding) mode");
 656         put_help("-fprofile-generate",       "Generate instrumented code to collect profile information");
 657         put_help("-fprofile-use",            "Use profile information generated by instrumented binaries");
 658         put_help("-pthread",                 "Use pthread threading library");
 659         put_help("-fverbose-asm",            "ignored (gcc compatibility)");
 660         put_help("-ffast-math",              "ignored (gcc compatibility)");
 661         put_help("-fjump-tables",            "ignored (gcc compatibility)");
 662         put_help("-fcommon",                 "ignored (gcc compatibility)");
 663         put_help("-foptimize-sibling-calls", "ignored (gcc compatibility)");
 664         put_help("-falign-loops",            "ignored (gcc compatibility)");
 665         put_help("-falign-jumps",            "ignored (gcc compatibility)");
 666         put_help("-falign-functions",        "ignored (gcc compatibility)");
 667         put_help("-fPIC",                    "ignored (gcc compatibility)");
 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         puts("");
 681         puts("\tMost of these options can be used with a no- prefix to disable them");
 682         puts("\ti.e. -fno-signed-char");
 683 }
 684
 685 static void print_help_linker(void)
 686 {
 687         put_help("-l LIBRARY",               "");
 688         put_help("-L PATH",                  "");
 689         put_help("-shared",                  "Produce a shared library");
 690         put_help("-static",                  "Produce statically linked binary");
 691         put_help("-Wl,OPTION",               "pass option directly to linker");
 692 }
 693
 694 static void print_help_debug(void)
 695 {
 696         put_help("--lextest",                "Preprocess and tokenize only");
 697         put_help("--print-ast",              "Preprocess, parse and print AST");
 698         put_help("--print-implicit-cast",    "");
 699         put_help("--print-parenthesis",      "");
 700         put_help("--benchmark",              "Preprocess and parse, produces no output");
 701         put_help("--time",                   "Measure time of compiler passes");
 702         put_help("--dump-function func",     "Preprocess, parse and output vcg graph of func");
 703         put_help("--export-ir",              "Preprocess, parse and output compiler intermediate representation");
 704 }
 705
 706 static void print_help_language_tools(void)
 707 {
 708         put_help("--print-fluffy",           "Preprocess, parse and generate declarations for the fluffy language");
 709         put_help("--print-jna",              "Preprocess, parse and generate declarations for JNA");
 710         put_help("--jna-limit filename",     "");
 711         put_help("--jna-libname name",       "");
 712 }
 713
 714 static void print_help_firm(void)
 715 {
 716         put_help("-bOPTION",                 "directly pass option to libFirm backend");
 717         int res = be_parse_arg("help");
 718         (void) res;
 719         assert(res);
 720 }
 721
 722 typedef enum {
 723         HELP_NONE          = 0,
 724         HELP_BASIC         = 1u << 0,
 725         HELP_PREPROCESSOR  = 1u << 1,
 726         HELP_PARSER        = 1u << 2,
 727         HELP_WARNINGS      = 1u << 3,
 728         HELP_OPTIMISATION  = 1u << 4,
 729         HELP_CODEGEN       = 1u << 5,
 730         HELP_LINKER        = 1u << 6,
 731         HELP_LANGUAGETOOLS = 1u << 7,
 732         HELP_DEBUG         = 1u << 8,
 733         HELP_FIRM          = 1u << 9,
 734
 735         HELP_ALL           = (unsigned)-1
 736 } help_sections_t;
 737
 738 static void print_help(const char *argv0, help_sections_t sections)
 739 {
 740         if (sections & HELP_BASIC)         print_help_basic(argv0);
 741         if (sections & HELP_PREPROCESSOR)  print_help_preprocessor();
 742         if (sections & HELP_PARSER)        print_help_parser();
 743         if (sections & HELP_WARNINGS)      print_help_warnings();
 744         if (sections & HELP_OPTIMISATION)  print_help_optimisation();
 745         if (sections & HELP_CODEGEN)       print_help_codegeneration();
 746         if (sections & HELP_LINKER)        print_help_linker();
 747         if (sections & HELP_LANGUAGETOOLS) print_help_language_tools();
 748         if (sections & HELP_DEBUG)         print_help_debug();
 749         if (sections & HELP_FIRM)          print_help_firm();
 750 }
 751
 752 static void set_be_option(const char *arg)
 753 {
 754         int res = be_parse_arg(arg);
 755         (void) res;
 756         assert(res);
 757 }
 758
 759 static void copy_file(FILE *dest, FILE *input)
 760 {
 761         char buf[16384];
 762
 763         while (!feof(input) && !ferror(dest)) {
 764                 size_t read = fread(buf, 1, sizeof(buf), input);
 765                 if (fwrite(buf, 1, read, dest) != read) {
 766                         perror("couldn't write output");
 767                 }
 768         }
 769 }
 770
 771 static FILE *open_file(const char *filename)
 772 {
 773         if (streq(filename, "-")) {
 774                 return stdin;
 775         }
 776
 777         FILE *in = fopen(filename, "r");
 778         if (in == NULL) {
 779                 fprintf(stderr, "Couldn't open '%s': %s\n", filename,
 780                                 strerror(errno));
 781                 exit(EXIT_FAILURE);
 782         }
 783
 784         return in;
 785 }
 786
 787 static filetype_t get_filetype_from_string(const char *string)
 788 {
 789         if (streq(string, "c") || streq(string, "c-header"))
 790                 return FILETYPE_C;
 791         if (streq(string, "c++") || streq(string, "c++-header"))
 792                 return FILETYPE_CXX;
 793         if (streq(string, "assembler"))
 794                 return FILETYPE_PREPROCESSED_ASSEMBLER;
 795         if (streq(string, "assembler-with-cpp"))
 796                 return FILETYPE_ASSEMBLER;
 797         if (streq(string, "none"))
 798                 return FILETYPE_AUTODETECT;
 799
 800         return FILETYPE_UNKNOWN;
 801 }
 802
 803 static bool init_os_support(void)
 804 {
 805         const char *os = target_machine->operating_system;
 806         wchar_atomic_kind         = ATOMIC_TYPE_INT;
 807         force_long_double_size    = 0;
 808         enable_main_collect2_hack = false;
 809         define_intmax_types       = false;
 810
 811         if (strstr(os, "linux") != NULL || strstr(os, "bsd") != NULL
 812                         || streq(os, "solaris")) {
 813                 set_create_ld_ident(create_name_linux_elf);
 814         } else if (streq(os, "darwin")) {
 815                 force_long_double_size = 16;
 816                 set_create_ld_ident(create_name_macho);
 817                 define_intmax_types = true;
 818         } else if (strstr(os, "mingw") != NULL || streq(os, "win32")) {
 819                 wchar_atomic_kind         = ATOMIC_TYPE_USHORT;
 820                 enable_main_collect2_hack = true;
 821                 set_create_ld_ident(create_name_win32);
 822         } else {
 823                 return false;
 824         }
 825
 826         return true;
 827 }
 828
 829 static bool parse_target_triple(const char *arg)
 830 {
 831         machine_triple_t *triple = firm_parse_machine_triple(arg);
 832         if (triple == NULL) {
 833                 fprintf(stderr, "Target-triple is not in the form 'cpu_type-manufacturer-operating_system'\n");
 834                 return false;
 835         }
 836         target_machine = triple;
 837         return true;
 838 }
 839
 840 static void setup_target_machine(void)
 841 {
 842         if (!setup_firm_for_machine(target_machine))
 843                 exit(1);
 844         init_os_support();
 845 }
 846
 847 int main(int argc, char **argv)
 848 {
 849         firm_early_init();
 850
 851         const char        *dumpfunction         = NULL;
 852         const char        *print_file_name_file = NULL;
 853         compile_mode_t     mode                 = CompileAssembleLink;
 854         int                opt_level            = 1;
 855         int                result               = EXIT_SUCCESS;
 856         char               cpu_arch[16]         = "ia32";
 857         file_list_entry_t *files                = NULL;
 858         file_list_entry_t *last_file            = NULL;
 859         bool               construct_dep_target = false;
 860         bool               do_timing            = false;
 861         bool               profile_generate     = false;
 862         bool               profile_use          = false;
 863         struct obstack     file_obst;
 864
 865         atexit(free_temp_files);
 866
 867         /* hack for now... */
 868         if (strstr(argv[0], "pptest") != NULL) {
 869                 extern int pptest_main(int argc, char **argv);
 870                 return pptest_main(argc, argv);
 871         }
 872
 873         obstack_init(&cppflags_obst);
 874         obstack_init(&ldflags_obst);
 875         obstack_init(&asflags_obst);
 876         obstack_init(&file_obst);
 877
 878 #define GET_ARG_AFTER(def, args)                                             \
 879         def = &arg[sizeof(args)-1];                                              \
 880         if (def[0] == '\0') {                                                     \
 881                 ++i;                                                                 \
 882                 if (i >= argc) {                                                      \
 883                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 884                         argument_errors = true;                                          \
 885                         break;                                                           \
 886                 }                                                                    \
 887                 def = argv[i];                                                       \
 888                 if (def[0] == '-' && def[1] != '\0') {                                \
 889                         fprintf(stderr, "error: expected argument after '" args "'\n");  \
 890                         argument_errors = true;                                          \
 891                         continue;                                                        \
 892                 }                                                                    \
 893         }
 894
 895 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 896
 897         /* early options parsing (find out optimisation level and OS) */
 898         for (int i = 1; i < argc; ++i) {
 899                 const char *arg = argv[i];
 900                 if (arg[0] != '-')
 901                         continue;
 902
 903                 const char *option = &arg[1];
 904                 if (option[0] == 'O') {
 905                         sscanf(&option[1], "%d", &opt_level);
 906                 }
 907         }
 908
 909         const char *target = getenv("TARGET");
 910         if (target != NULL)
 911                 parse_target_triple(target);
 912         if (target_machine == NULL) {
 913                 target_machine = firm_get_host_machine();
 914         }
 915         choose_optimization_pack(opt_level);
 916         setup_target_machine();
 917
 918         /* parse rest of options */
 919                         standard        = STANDARD_DEFAULT;
 920         unsigned        features_on     = 0;
 921         unsigned        features_off    = 0;
 922         filetype_t      forced_filetype = FILETYPE_AUTODETECT;
 923         help_sections_t help            = HELP_NONE;
 924         bool            argument_errors = false;
 925         for (int i = 1; i < argc; ++i) {
 926                 const char *arg = argv[i];
 927                 if (arg[0] == '-' && arg[1] != '\0') {
 928                         /* an option */
 929                         const char *option = &arg[1];
 930                         if (option[0] == 'o') {
 931                                 GET_ARG_AFTER(outname, "-o");
 932                         } else if (option[0] == 'g') {
 933                                 set_be_option("debuginfo=stabs");
 934                                 set_be_option("omitfp=no");
 935                                 set_be_option("ia32-nooptcc=yes");
 936                         } else if (SINGLE_OPTION('c')) {
 937                                 mode = CompileAssemble;
 938                         } else if (SINGLE_OPTION('E')) {
 939                                 mode = PreprocessOnly;
 940                         } else if (SINGLE_OPTION('S')) {
 941                                 mode = Compile;
 942                         } else if (option[0] == 'O') {
 943                                 continue;
 944                         } else if (option[0] == 'I') {
 945                                 const char *opt;
 946                                 GET_ARG_AFTER(opt, "-I");
 947                                 add_flag(&cppflags_obst, "-I%s", opt);
 948                         } else if (option[0] == 'D') {
 949                                 const char *opt;
 950                                 GET_ARG_AFTER(opt, "-D");
 951                                 add_flag(&cppflags_obst, "-D%s", opt);
 952                         } else if (option[0] == 'U') {
 953                                 const char *opt;
 954                                 GET_ARG_AFTER(opt, "-U");
 955                                 add_flag(&cppflags_obst, "-U%s", opt);
 956                         } else if (option[0] == 'l') {
 957                                 const char *opt;
 958                                 GET_ARG_AFTER(opt, "-l");
 959                                 add_flag(&ldflags_obst, "-l%s", opt);
 960                         } else if (option[0] == 'L') {
 961                                 const char *opt;
 962                                 GET_ARG_AFTER(opt, "-L");
 963                                 add_flag(&ldflags_obst, "-L%s", opt);
 964                         } else if (SINGLE_OPTION('v')) {
 965                                 verbose = 1;
 966                         } else if (SINGLE_OPTION('w')) {
 967                                 memset(&warning, 0, sizeof(warning));
 968                         } else if (option[0] == 'x') {
 969                                 const char *opt;
 970                                 GET_ARG_AFTER(opt, "-x");
 971                                 forced_filetype = get_filetype_from_string(opt);
 972                                 if (forced_filetype == FILETYPE_UNKNOWN) {
 973                                         fprintf(stderr, "Unknown language '%s'\n", opt);
 974                                         argument_errors = true;
 975                                 }
 976                         } else if (streq(option, "M")) {
 977                                 mode = PreprocessOnly;
 978                                 add_flag(&cppflags_obst, "-M");
 979                         } else if (streq(option, "MMD") ||
 980                                    streq(option, "MD")) {
 981                             construct_dep_target = true;
 982                                 add_flag(&cppflags_obst, "-%s", option);
 983                         } else if (streq(option, "MM")  ||
 984                                    streq(option, "MP")) {
 985                                 add_flag(&cppflags_obst, "-%s", option);
 986                         } else if (streq(option, "MT") ||
 987                                    streq(option, "MQ") ||
 988                                    streq(option, "MF")) {
 989                                 const char *opt;
 990                                 GET_ARG_AFTER(opt, "-MT");
 991                                 add_flag(&cppflags_obst, "-%s", option);
 992                                 add_flag(&cppflags_obst, "%s", opt);
 993                         } else if (streq(option, "include")) {
 994                                 const char *opt;
 995                                 GET_ARG_AFTER(opt, "-include");
 996                                 add_flag(&cppflags_obst, "-include");
 997                                 add_flag(&cppflags_obst, "%s", opt);
 998                         } else if (streq(option, "isystem")) {
 999                                 const char *opt;
1000                                 GET_ARG_AFTER(opt, "-isystem");
1001                                 add_flag(&cppflags_obst, "-isystem");
1002                                 add_flag(&cppflags_obst, "%s", opt);
1003 #if defined(linux) || defined(__linux) || defined(__linux__) || defined(__CYGWIN__)
1004                         } else if (streq(option, "pthread")) {
1005                                 /* set flags for the preprocessor */
1006                                 add_flag(&cppflags_obst, "-D_REENTRANT");
1007                                 /* set flags for the linker */
1008                                 add_flag(&ldflags_obst, "-lpthread");
1009 #endif
1010                         } else if (streq(option, "nostdinc")
1011                                         || streq(option, "trigraphs")) {
1012                                 /* pass these through to the preprocessor */
1013                                 add_flag(&cppflags_obst, "%s", arg);
1014                         } else if (streq(option, "pipe")) {
1015                                 /* here for gcc compatibility */
1016                         } else if (streq(option, "static")) {
1017                                 add_flag(&ldflags_obst, "-static");
1018                         } else if (streq(option, "shared")) {
1019                                 add_flag(&ldflags_obst, "-shared");
1020                         } else if (option[0] == 'f') {
1021                                 char const *orig_opt;
1022                                 GET_ARG_AFTER(orig_opt, "-f");
1023
1024                                 if (strstart(orig_opt, "input-charset=")) {
1025                                         char const* const encoding = strchr(orig_opt, '=') + 1;
1026                                         select_input_encoding(encoding);
1027                                 } else if (strstart(orig_opt, "align-loops=") ||
1028                                            strstart(orig_opt, "align-jumps=") ||
1029                                            strstart(orig_opt, "visibility=")  ||
1030                                            strstart(orig_opt, "align-functions=")) {
1031                                         fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
1032                                 } else if (strstart(orig_opt, "message-length=")) {
1033                                         /* ignore: would only affect error message format */
1034                                 } else {
1035                                         /* -f options which have an -fno- variant */
1036                                         char const *opt         = orig_opt;
1037                                         bool        truth_value = true;
1038                                         if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
1039                                                 truth_value = false;
1040                                                 opt += 3;
1041                                         }
1042
1043                                         if (streq(opt, "builtins")) {
1044                                                 use_builtins = truth_value;
1045                                         } else if (streq(opt, "dollars-in-identifiers")) {
1046                                                 allow_dollar_in_symbol = truth_value;
1047                                         } else if (streq(opt, "omit-frame-pointer")) {
1048                                                 set_be_option(truth_value ? "omitfp" : "omitfp=no");
1049                                         } else if (streq(opt, "short-wchar")) {
1050                                                 wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
1051                                                         : ATOMIC_TYPE_INT;
1052                                         } else if (streq(opt, "show-column")) {
1053                                                 show_column = truth_value;
1054                                         } else if (streq(opt, "signed-char")) {
1055                                                 char_is_signed = truth_value;
1056                                         } else if (streq(opt, "strength-reduce")) {
1057                                                 firm_option(truth_value ? "strength-red" : "no-strength-red");
1058                                         } else if (streq(opt, "syntax-only")) {
1059                                                 mode = truth_value ? ParseOnly : CompileAssembleLink;
1060                                         } else if (streq(opt, "unsigned-char")) {
1061                                                 char_is_signed = !truth_value;
1062                                         } else if (streq(opt, "freestanding")) {
1063                                                 freestanding = truth_value;
1064                                         } else if (streq(opt, "hosted")) {
1065                                                 freestanding = !truth_value;
1066                                         } else if (streq(opt, "profile-generate")) {
1067                                                 profile_generate = truth_value;
1068                                         } else if (streq(opt, "profile-use")) {
1069                                                 profile_use = truth_value;
1070                                         } else if (!truth_value &&
1071                                                    streq(opt, "asynchronous-unwind-tables")) {
1072                                             /* nothing todo, a gcc feature which we don't support
1073                                              * anyway was deactivated */
1074                                         } else if (streq(orig_opt, "verbose-asm")) {
1075                                                 /* ignore: we always print verbose assembler */
1076                                         } else if (streq(opt, "fast-math")               ||
1077                                                    streq(opt, "jump-tables")             ||
1078                                                    streq(opt, "expensive-optimizations") ||
1079                                                    streq(opt, "common")                  ||
1080                                                    streq(opt, "optimize-sibling-calls")  ||
1081                                                    streq(opt, "align-loops")             ||
1082                                                    streq(opt, "align-jumps")             ||
1083                                                    streq(opt, "align-functions")         ||
1084                                                    streq(opt, "PIC")) {
1085                                                 fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
1086                                         } else if (streq(opt, "help")) {
1087                                                 fprintf(stderr, "warning: -fhelp is deprecated\n");
1088                                                 help |= HELP_FIRM;
1089                                         } else {
1090                                                 int res = firm_option(orig_opt);
1091                                                 if (res == 0) {
1092                                                         fprintf(stderr, "error: unknown Firm option '-f%s'\n",
1093                                                                 orig_opt);
1094                                                         argument_errors = true;
1095                                                         continue;
1096                                                 }
1097                                         }
1098                                 }
1099                         } else if (option[0] == 'b') {
1100                                 const char *opt;
1101                                 GET_ARG_AFTER(opt, "-b");
1102
1103                                 if (streq(opt, "help")) {
1104                                         fprintf(stderr, "warning: -bhelp is deprecated (use --help-firm)\n");
1105                                         help |= HELP_FIRM;
1106                                 } else {
1107                                         int res = be_parse_arg(opt);
1108                                         if (res == 0) {
1109                                                 fprintf(stderr, "error: unknown Firm backend option '-b %s'\n",
1110                                                                 opt);
1111                                                 argument_errors = true;
1112                                         } else if (strstart(opt, "isa=")) {
1113                                                 strncpy(cpu_arch, opt, sizeof(cpu_arch));
1114                                         }
1115                                 }
1116                         } else if (option[0] == 'W') {
1117                                 if (option[1] == '\0') {
1118                                         /* ignore -W, our defaults are already quite verbose */
1119                                 } else if (strstart(option + 1, "p,")) {
1120                                         // pass options directly to the preprocessor
1121                                         const char *opt;
1122                                         GET_ARG_AFTER(opt, "-Wp,");
1123                                         add_flag(&cppflags_obst, "-Wp,%s", opt);
1124                                 } else if (strstart(option + 1, "l,")) {
1125                                         // pass options directly to the linker
1126                                         const char *opt;
1127                                         GET_ARG_AFTER(opt, "-Wl,");
1128                                         add_flag(&ldflags_obst, "-Wl,%s", opt);
1129                                 } else if (streq(option + 1, "no-trigraphs")
1130                                                         || streq(option + 1, "undef")) {
1131                                         add_flag(&cppflags_obst, "%s", arg);
1132                                 } else {
1133                                         set_warning_opt(&option[1]);
1134                                 }
1135                         } else if (option[0] == 'm') {
1136                                 /* -m options */
1137                                 const char *opt;
1138                                 char arch_opt[64];
1139
1140                                 GET_ARG_AFTER(opt, "-m");
1141                                 if (strstart(opt, "target=")) {
1142                                         GET_ARG_AFTER(opt, "-mtarget=");
1143                                         if (!parse_target_triple(opt)) {
1144                                                 argument_errors = true;
1145                                         } else {
1146                                                 setup_target_machine();
1147                                                 target_triple = opt;
1148                                         }
1149                                 } else if (strstart(opt, "triple=")) {
1150                                         GET_ARG_AFTER(opt, "-mtriple=");
1151                                         if (!parse_target_triple(opt)) {
1152                                                 argument_errors = true;
1153                                         } else {
1154                                                 setup_target_machine();
1155                                                 target_triple = opt;
1156                                         }
1157                                 } else if (strstart(opt, "arch=")) {
1158                                         GET_ARG_AFTER(opt, "-march=");
1159                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1160                                         int res = be_parse_arg(arch_opt);
1161                                         if (res == 0) {
1162                                                 fprintf(stderr, "Unknown architecture '%s'\n", arch_opt);
1163                                                 argument_errors = true;
1164                                         } else {
1165                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1166                                                 int res = be_parse_arg(arch_opt);
1167                                                 if (res == 0)
1168                                                         argument_errors = true;
1169                                         }
1170                                 } else if (strstart(opt, "tune=")) {
1171                                         GET_ARG_AFTER(opt, "-mtune=");
1172                                         snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
1173                                         int res = be_parse_arg(arch_opt);
1174                                         if (res == 0)
1175                                                 argument_errors = true;
1176                                 } else if (strstart(opt, "cpu=")) {
1177                                         GET_ARG_AFTER(opt, "-mcpu=");
1178                                         snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
1179                                         int res = be_parse_arg(arch_opt);
1180                                         if (res == 0)
1181                                                 argument_errors = true;
1182                                 } else if (strstart(opt, "fpmath=")) {
1183                                         GET_ARG_AFTER(opt, "-mfpmath=");
1184                                         if (streq(opt, "387"))
1185                                                 opt = "x87";
1186                                         else if (streq(opt, "sse"))
1187                                                 opt = "sse2";
1188                                         else {
1189                                                 fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
1190                                                 argument_errors = true;
1191                                         }
1192                                         if (!argument_errors) {
1193                                                 snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
1194                                                 int res = be_parse_arg(arch_opt);
1195                                                 if (res == 0)
1196                                                         argument_errors = true;
1197                                         }
1198                                 } else if (strstart(opt, "preferred-stack-boundary=")) {
1199                                         GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
1200                                         snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
1201                                         int res = be_parse_arg(arch_opt);
1202                                         if (res == 0)
1203                                                 argument_errors = true;
1204                                 } else if (streq(opt, "rtd")) {
1205                                         default_calling_convention = CC_STDCALL;
1206                                 } else if (strstart(opt, "regparm=")) {
1207                                         fprintf(stderr, "error: regparm convention not supported yet\n");
1208                                         argument_errors = true;
1209                                 } else if (streq(opt, "soft-float")) {
1210                                         fprintf(stderr, "error: software floatingpoint not supported yet\n");
1211                                         argument_errors = true;
1212                                 } else {
1213                                         long int value = strtol(opt, NULL, 10);
1214                                         if (value == 0) {
1215                                                 fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
1216                                                 argument_errors = true;
1217                                         } else if (value != 16 && value != 32 && value != 64) {
1218                                                 fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
1219                                                 argument_errors = true;
1220                                         } else {
1221                                                 machine_size = (unsigned int)value;
1222                                                 add_flag(&cppflags_obst, "-m%u", machine_size);
1223                                                 add_flag(&asflags_obst, "-m%u", machine_size);
1224                                                 add_flag(&ldflags_obst, "-m%u", machine_size);
1225                                         }
1226                                 }
1227                         } else if (streq(option, "pg")) {
1228                                 set_be_option("gprof");
1229                                 add_flag(&ldflags_obst, "-pg");
1230                         } else if (streq(option, "pedantic") ||
1231                                    streq(option, "ansi")) {
1232                                 fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
1233                         } else if (strstart(option, "std=")) {
1234                                 const char *const o = &option[4];
1235                                 standard =
1236                                         streq(o, "c++")            ? STANDARD_CXX98   :
1237                                         streq(o, "c++98")          ? STANDARD_CXX98   :
1238                                         streq(o, "c89")            ? STANDARD_C89     :
1239                                         streq(o, "c99")            ? STANDARD_C99     :
1240                                         streq(o, "c9x")            ? STANDARD_C99     : // deprecated
1241                                         streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
1242                                         streq(o, "gnu89")          ? STANDARD_GNU89   :
1243                                         streq(o, "gnu99")          ? STANDARD_GNU99   :
1244                                         streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
1245                                         streq(o, "iso9899:1990")   ? STANDARD_C89     :
1246                                         streq(o, "iso9899:199409") ? STANDARD_C90     :
1247                                         streq(o, "iso9899:1999")   ? STANDARD_C99     :
1248                                         streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
1249                                         (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
1250                         } else if (streq(option, "version")) {
1251                                 print_cparser_version();
1252                         } else if (strstart(option, "print-file-name=")) {
1253                                 GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
1254                         } else if (option[0] == '-') {
1255                                 /* double dash option */
1256                                 ++option;
1257                                 if (streq(option, "gcc")) {
1258                                         features_on  |=  _GNUC;
1259                                         features_off &= ~_GNUC;
1260                                 } else if (streq(option, "no-gcc")) {
1261                                         features_on  &= ~_GNUC;
1262                                         features_off |=  _GNUC;
1263                                 } else if (streq(option, "ms")) {
1264                                         features_on  |=  _MS;
1265                                         features_off &= ~_MS;
1266                                 } else if (streq(option, "no-ms")) {
1267                                         features_on  &= ~_MS;
1268                                         features_off |=  _MS;
1269                                 } else if (streq(option, "strict")) {
1270                                         strict_mode = true;
1271                                 } else if (streq(option, "lextest")) {
1272                                         mode = LexTest;
1273                                 } else if (streq(option, "benchmark")) {
1274                                         mode = BenchmarkParser;
1275                                 } else if (streq(option, "print-ast")) {
1276                                         mode = PrintAst;
1277                                 } else if (streq(option, "print-implicit-cast")) {
1278                                         print_implicit_casts = true;
1279                                 } else if (streq(option, "print-parenthesis")) {
1280                                         print_parenthesis = true;
1281                                 } else if (streq(option, "print-fluffy")) {
1282                                         mode = PrintFluffy;
1283                                 } else if (streq(option, "print-jna")) {
1284                                         mode = PrintJna;
1285                                 } else if (streq(option, "jna-limit")) {
1286                                         ++i;
1287                                         if (i >= argc) {
1288                                                 fprintf(stderr, "error: "
1289                                                         "expected argument after '--jna-limit'\n");
1290                                                 argument_errors = true;
1291                                                 break;
1292                                         }
1293                                         jna_limit_output(argv[i]);
1294                                 } else if (streq(option, "jna-libname")) {
1295                                         ++i;
1296                                         if (i >= argc) {
1297                                                 fprintf(stderr, "error: "
1298                                                         "expected argument after '--jna-libname'\n");
1299                                                 argument_errors = true;
1300                                                 break;
1301                                         }
1302                                         jna_set_libname(argv[i]);
1303                                 } else if (streq(option, "time")) {
1304                                         do_timing = true;
1305                                 } else if (streq(option, "version")) {
1306                                         print_cparser_version();
1307                                         return EXIT_SUCCESS;
1308                                 } else if (streq(option, "help")) {
1309                                         help |= HELP_BASIC;
1310                                 } else if (streq(option, "help-parser")) {
1311                                         help |= HELP_PARSER;
1312                                 } else if (streq(option, "help-warnings")) {
1313                                         help |= HELP_WARNINGS;
1314                                 } else if (streq(option, "help-codegen")) {
1315                                         help |= HELP_CODEGEN;
1316                                 } else if (streq(option, "help-linker")) {
1317                                         help |= HELP_LINKER;
1318                                 } else if (streq(option, "help-language-tools")) {
1319                                         help |= HELP_LANGUAGETOOLS;
1320                                 } else if (streq(option, "help-debug")) {
1321                                         help |= HELP_DEBUG;
1322                                 } else if (streq(option, "help-firm")) {
1323                                         help |= HELP_FIRM;
1324                                 } else if (streq(option, "help-all")) {
1325                                         help |= HELP_ALL;
1326                                 } else if (streq(option, "dump-function")) {
1327                                         ++i;
1328                                         if (i >= argc) {
1329                                                 fprintf(stderr, "error: "
1330                                                         "expected argument after '--dump-function'\n");
1331                                                 argument_errors = true;
1332                                                 break;
1333                                         }
1334                                         dumpfunction = argv[i];
1335                                         mode         = CompileDump;
1336                                 } else if (streq(option, "export-ir")) {
1337                                         mode = CompileExportIR;
1338                                 } else {
1339                                         fprintf(stderr, "error: unknown argument '%s'\n", arg);
1340                                         argument_errors = true;
1341                                 }
1342                         } else {
1343                                 fprintf(stderr, "error: unknown argument '%s'\n", arg);
1344                                 argument_errors = true;
1345                         }
1346                 } else {
1347                         filetype_t type = forced_filetype;
1348                         if (type == FILETYPE_AUTODETECT) {
1349                                 if (streq(arg, "-")) {
1350                                         /* - implicitly means C source file */
1351                                         type = FILETYPE_C;
1352                                 } else {
1353                                         const char *suffix = strrchr(arg, '.');
1354                                         /* Ensure there is at least one char before the suffix */
1355                                         if (suffix != NULL && suffix != arg) {
1356                                                 ++suffix;
1357                                                 type =
1358                                                         streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
1359                                                         streq(suffix, "a")   ? FILETYPE_OBJECT                 :
1360                                                         streq(suffix, "c")   ? FILETYPE_C                      :
1361                                                         streq(suffix, "i")   ? FILETYPE_PREPROCESSED_C         :
1362                                                         streq(suffix, "C")   ? FILETYPE_CXX                    :
1363                                                         streq(suffix, "cc")  ? FILETYPE_CXX                    :
1364                                                         streq(suffix, "cp")  ? FILETYPE_CXX                    :
1365                                                         streq(suffix, "cpp") ? FILETYPE_CXX                    :
1366                                                         streq(suffix, "CPP") ? FILETYPE_CXX                    :
1367                                                         streq(suffix, "cxx") ? FILETYPE_CXX                    :
1368                                                         streq(suffix, "c++") ? FILETYPE_CXX                    :
1369                                                         streq(suffix, "ii")  ? FILETYPE_PREPROCESSED_CXX       :
1370                                                         streq(suffix, "h")   ? FILETYPE_C                      :
1371                                                         streq(suffix, "ir")  ? FILETYPE_IR                     :
1372                                                         streq(suffix, "o")   ? FILETYPE_OBJECT                 :
1373                                                         streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
1374                                                         streq(suffix, "so")  ? FILETYPE_OBJECT                 :
1375                                                         FILETYPE_OBJECT; /* gcc behavior: unknown file extension means object file */
1376                                         }
1377                                 }
1378                         }
1379
1380                         file_list_entry_t *entry
1381                                 = obstack_alloc(&file_obst, sizeof(entry[0]));
1382                         memset(entry, 0, sizeof(entry[0]));
1383                         entry->name = arg;
1384                         entry->type = type;
1385
1386                         if (last_file != NULL) {
1387                                 last_file->next = entry;
1388                         } else {
1389                                 files = entry;
1390                         }
1391                         last_file = entry;
1392                 }
1393         }
1394
1395         if (help != HELP_NONE) {
1396                 print_help(argv[0], help);
1397                 return !argument_errors;
1398         }
1399
1400         if (print_file_name_file != NULL) {
1401                 print_file_name(print_file_name_file);
1402                 return EXIT_SUCCESS;
1403         }
1404         if (files == NULL) {
1405                 fprintf(stderr, "error: no input files specified\n");
1406                 argument_errors = true;
1407         }
1408
1409         if (argument_errors) {
1410                 usage(argv[0]);
1411                 return EXIT_FAILURE;
1412         }
1413
1414         /* apply some effects from switches */
1415         c_mode |= features_on;
1416         c_mode &= ~features_off;
1417         if (profile_generate) {
1418                 add_flag(&ldflags_obst, "-lfirmprof");
1419                 set_be_option("profilegenerate");
1420         }
1421         if (profile_use) {
1422                 set_be_option("profileuse");
1423         }
1424
1425         gen_firm_init();
1426         byte_order_big_endian = be_get_backend_param()->byte_order_big_endian;
1427         init_symbol_table();
1428         init_types();
1429         init_typehash();
1430         init_basic_types();
1431         init_lexer();
1432         init_ast();
1433         init_parser();
1434         init_ast2firm();
1435         init_mangle();
1436
1437         if (do_timing)
1438                 timer_init();
1439
1440         if (construct_dep_target) {
1441                 if (outname != 0 && strlen(outname) >= 2) {
1442                         get_output_name(dep_target, sizeof(dep_target), outname, ".d");
1443                 } else {
1444                         get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
1445                 }
1446         } else {
1447                 dep_target[0] = '\0';
1448         }
1449
1450         char outnamebuf[4096];
1451         if (outname == NULL) {
1452                 const char *filename = files->name;
1453
1454                 switch(mode) {
1455                 case BenchmarkParser:
1456                 case PrintAst:
1457                 case PrintFluffy:
1458                 case PrintJna:
1459                 case LexTest:
1460                 case PreprocessOnly:
1461                 case ParseOnly:
1462                         outname = "-";
1463                         break;
1464                 case Compile:
1465                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
1466                         outname = outnamebuf;
1467                         break;
1468                 case CompileAssemble:
1469                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
1470                         outname = outnamebuf;
1471                         break;
1472                 case CompileDump:
1473                         get_output_name(outnamebuf, sizeof(outnamebuf), dumpfunction,
1474                                         ".vcg");
1475                         outname = outnamebuf;
1476                         break;
1477                 case CompileExportIR:
1478                         get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
1479                         outname = outnamebuf;
1480                         break;
1481                 case CompileAssembleLink:
1482 #ifdef _WIN32
1483                         outname = "a.exe";
1484 #else
1485                         outname = "a.out";
1486 #endif
1487                         break;
1488                 }
1489         }
1490
1491         assert(outname != NULL);
1492
1493         FILE *out;
1494         if (streq(outname, "-")) {
1495                 out = stdout;
1496         } else {
1497                 out = fopen(outname, "w");
1498                 if (out == NULL) {
1499                         fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
1500                                         strerror(errno));
1501                         return EXIT_FAILURE;
1502                 }
1503         }
1504
1505         file_list_entry_t *file;
1506         bool               already_constructed_firm = false;
1507         for (file = files; file != NULL; file = file->next) {
1508                 char        asm_tempfile[1024];
1509                 const char *filename = file->name;
1510                 filetype_t  filetype = file->type;
1511
1512                 if (filetype == FILETYPE_OBJECT)
1513                         continue;
1514
1515                 FILE *in = NULL;
1516                 if (mode == LexTest) {
1517                         if (in == NULL)
1518                                 in = open_file(filename);
1519                         lextest(in, filename);
1520                         fclose(in);
1521                         return EXIT_SUCCESS;
1522                 }
1523
1524                 FILE *preprocessed_in = NULL;
1525                 filetype_t next_filetype = filetype;
1526                 switch (filetype) {
1527                         case FILETYPE_C:
1528                                 next_filetype = FILETYPE_PREPROCESSED_C;
1529                                 goto preprocess;
1530                         case FILETYPE_CXX:
1531                                 next_filetype = FILETYPE_PREPROCESSED_CXX;
1532                                 goto preprocess;
1533                         case FILETYPE_ASSEMBLER:
1534                                 next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1535                                 goto preprocess;
1536 preprocess:
1537                                 /* no support for input on FILE* yet */
1538                                 if (in != NULL)
1539                                         panic("internal compiler error: in for preprocessor != NULL");
1540
1541                                 preprocessed_in = preprocess(filename, filetype);
1542                                 if (mode == PreprocessOnly) {
1543                                         copy_file(out, preprocessed_in);
1544                                         int result = pclose(preprocessed_in);
1545                                         fclose(out);
1546                                         /* remove output file in case of error */
1547                                         if (out != stdout && result != EXIT_SUCCESS) {
1548                                                 unlink(outname);
1549                                         }
1550                                         return result;
1551                                 }
1552
1553                                 in = preprocessed_in;
1554                                 filetype = next_filetype;
1555                                 break;
1556
1557                         default:
1558                                 break;
1559                 }
1560
1561                 FILE *asm_out;
1562                 if (mode == Compile) {
1563                         asm_out = out;
1564                 } else {
1565                         asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
1566                 }
1567
1568                 if (in == NULL)
1569                         in = open_file(filename);
1570
1571                 /* preprocess and compile */
1572                 if (filetype == FILETYPE_PREPROCESSED_C) {
1573                         char const* invalid_mode;
1574                         switch (standard) {
1575                                 case STANDARD_ANSI:
1576                                 case STANDARD_C89:   c_mode = _C89;                break;
1577                                 /* TODO determine difference between these two */
1578                                 case STANDARD_C90:   c_mode = _C89;                break;
1579                                 case STANDARD_C99:   c_mode = _C89 | _C99;         break;
1580                                 case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
1581
1582 default_c_warn:
1583                                         fprintf(stderr,
1584                                                         "warning: command line option \"-std=%s\" is not valid for C\n",
1585                                                         invalid_mode);
1586                                         /* FALLTHROUGH */
1587                                 case STANDARD_DEFAULT:
1588                                 case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
1589
1590                                 case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
1591                                 case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
1592                         }
1593                         goto do_parsing;
1594                 } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
1595                         char const* invalid_mode;
1596                         switch (standard) {
1597                                 case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
1598                                 case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
1599                                 case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
1600                                 case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
1601                                 case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
1602
1603                                 case STANDARD_ANSI:
1604                                 case STANDARD_CXX98: c_mode = _CXX; break;
1605
1606 default_cxx_warn:
1607                                         fprintf(stderr,
1608                                                         "warning: command line option \"-std=%s\" is not valid for C++\n",
1609                                                         invalid_mode);
1610                                 case STANDARD_DEFAULT:
1611                                 case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
1612                         }
1613
1614 do_parsing:
1615                         c_mode |= features_on;
1616                         c_mode &= ~features_off;
1617
1618                         /* do the actual parsing */
1619                         ir_timer_t *t_parsing = ir_timer_new();
1620                         timer_register(t_parsing, "Frontend: Parsing");
1621                         timer_push(t_parsing);
1622                         init_tokens();
1623                         translation_unit_t *const unit = do_parsing(in, filename);
1624                         timer_pop(t_parsing);
1625
1626                         /* prints the AST even if errors occurred */
1627                         if (mode == PrintAst) {
1628                                 print_to_file(out);
1629                                 print_ast(unit);
1630                         }
1631
1632                         if (error_count > 0) {
1633                                 /* parsing failed because of errors */
1634                                 fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
1635                                         warning_count);
1636                                 result = EXIT_FAILURE;
1637                                 continue;
1638                         } else if (warning_count > 0) {
1639                                 fprintf(stderr, "%u warning(s)\n", warning_count);
1640                         }
1641
1642                         if (in == preprocessed_in) {
1643                                 int pp_result = pclose(preprocessed_in);
1644                                 if (pp_result != EXIT_SUCCESS) {
1645                                         /* remove output file */
1646                                         if (out != stdout)
1647                                                 unlink(outname);
1648                                         return EXIT_FAILURE;
1649                                 }
1650                         }
1651
1652                         if (mode == BenchmarkParser) {
1653                                 return result;
1654                         } else if (mode == PrintFluffy) {
1655                                 write_fluffy_decls(out, unit);
1656                                 continue;
1657                         } else if (mode == PrintJna) {
1658                                 write_jna_decls(out, unit);
1659                                 continue;
1660                         }
1661
1662                         /* build the firm graph */
1663                         ir_timer_t *t_construct = ir_timer_new();
1664                         timer_register(t_construct, "Frontend: Graph construction");
1665                         timer_push(t_construct);
1666                         if (already_constructed_firm) {
1667                                 panic("compiling multiple files/translation units not possible");
1668                         }
1669                         translation_unit_to_firm(unit);
1670                         already_constructed_firm = true;
1671                         timer_pop(t_construct);
1672
1673 graph_built:
1674                         if (mode == ParseOnly) {
1675                                 continue;
1676                         }
1677
1678                         if (mode == CompileDump) {
1679                                 /* find irg */
1680                                 ident    *id     = new_id_from_str(dumpfunction);
1681                                 ir_graph *irg    = NULL;
1682                                 int       n_irgs = get_irp_n_irgs();
1683                                 for (int i = 0; i < n_irgs; ++i) {
1684                                         ir_graph *tirg   = get_irp_irg(i);
1685                                         ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
1686                                         if (irg_id == id) {
1687                                                 irg = tirg;
1688                                                 break;
1689                                         }
1690                                 }
1691
1692                                 if (irg == NULL) {
1693                                         fprintf(stderr, "No graph for function '%s' found\n",
1694                                                 dumpfunction);
1695                                         return EXIT_FAILURE;
1696                                 }
1697
1698                                 dump_ir_graph_file(out, irg);
1699                                 fclose(out);
1700                                 return EXIT_SUCCESS;
1701                         }
1702
1703                         if (mode == CompileExportIR) {
1704                                 fclose(out);
1705                                 ir_export(outname);
1706                                 return EXIT_SUCCESS;
1707                         }
1708
1709                         gen_firm_finish(asm_out, filename);
1710                         if (asm_out != out) {
1711                                 fclose(asm_out);
1712                         }
1713                 } else if (filetype == FILETYPE_IR) {
1714                         fclose(in);
1715                         ir_import(filename);
1716                         goto graph_built;
1717                 } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1718                         copy_file(asm_out, in);
1719                         if (in == preprocessed_in) {
1720                                 int pp_result = pclose(preprocessed_in);
1721                                 if (pp_result != EXIT_SUCCESS) {
1722                                         /* remove output in error case */
1723                                         if (out != stdout)
1724                                                 unlink(outname);
1725                                         return pp_result;
1726                                 }
1727                         }
1728                         if (asm_out != out) {
1729                                 fclose(asm_out);
1730                         }
1731                 }
1732
1733                 if (mode == Compile)
1734                         continue;
1735
1736                 /* if we're here then we have preprocessed assembly */
1737                 filename = asm_tempfile;
1738                 filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
1739
1740                 /* assemble */
1741                 if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
1742                         char        temp[1024];
1743                         const char *filename_o;
1744                         if (mode == CompileAssemble) {
1745                                 fclose(out);
1746                                 filename_o = outname;
1747                         } else {
1748                                 FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
1749                                 fclose(tempf);
1750                                 filename_o = temp;
1751                         }
1752
1753                         assemble(filename_o, filename);
1754
1755                         size_t len = strlen(filename_o) + 1;
1756                         filename = obstack_copy(&file_obst, filename_o, len);
1757                         filetype = FILETYPE_OBJECT;
1758                 }
1759
1760                 /* ok we're done here, process next file */
1761                 file->name = filename;
1762                 file->type = filetype;
1763         }
1764
1765         if (result != EXIT_SUCCESS) {
1766                 if (out != stdout)
1767                         unlink(outname);
1768                 return result;
1769         }
1770
1771         /* link program file */
1772         if (mode == CompileAssembleLink) {
1773                 obstack_1grow(&ldflags_obst, '\0');
1774                 const char *flags = obstack_finish(&ldflags_obst);
1775
1776                 /* construct commandline */
1777                 const char *linker = getenv("CPARSER_LINK");
1778                 if (linker != NULL) {
1779                         obstack_printf(&file_obst, "%s ", linker);
1780                 } else {
1781                         if (target_triple != NULL)
1782                                 obstack_printf(&file_obst, "%s-", target_triple);
1783                         obstack_printf(&file_obst, "%s ", LINKER);
1784                 }
1785
1786                 for (file_list_entry_t *entry = files; entry != NULL;
1787                                 entry = entry->next) {
1788                         if (entry->type != FILETYPE_OBJECT)
1789                                 continue;
1790
1791                         add_flag(&file_obst, "%s", entry->name);
1792                 }
1793
1794                 add_flag(&file_obst, "-o");
1795                 add_flag(&file_obst, outname);
1796                 obstack_printf(&file_obst, "%s", flags);
1797                 obstack_1grow(&file_obst, '\0');
1798
1799                 char *commandline = obstack_finish(&file_obst);
1800
1801                 if (verbose) {
1802                         puts(commandline);
1803                 }
1804                 int err = system(commandline);
1805                 if (err != EXIT_SUCCESS) {
1806                         fprintf(stderr, "linker reported an error\n");
1807                         return EXIT_FAILURE;
1808                 }
1809         }
1810
1811         if (do_timing)
1812                 timer_term(stderr);
1813
1814         obstack_free(&cppflags_obst, NULL);
1815         obstack_free(&ldflags_obst, NULL);
1816         obstack_free(&asflags_obst, NULL);
1817         obstack_free(&file_obst, NULL);
1818
1819         exit_mangle();
1820         exit_ast2firm();
1821         exit_parser();
1822         exit_ast();
1823         exit_lexer();
1824         exit_typehash();
1825         exit_types();
1826         exit_tokens();
1827         exit_symbol_table();
1828         return EXIT_SUCCESS;
1829 }