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diff --git a/libcpp/system.h b/libcpp/system.h
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+/* Get common system includes and various definitions and declarations based
+   on autoconf macros.
+   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2009
+   Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+
+#ifndef LIBCPP_SYSTEM_H
+#define LIBCPP_SYSTEM_H
+
+/* We must include stdarg.h before stdio.h.  */
+#include <stdarg.h>
+
+#ifdef HAVE_STDDEF_H
+# include <stddef.h>
+#endif
+
+#include <stdio.h>
+
+/* Define a generic NULL if one hasn't already been defined.  */
+#ifndef NULL
+#define NULL 0
+#endif
+
+/* Use the unlocked open routines from libiberty.  */
+#define fopen(PATH,MODE) fopen_unlocked(PATH,MODE)
+#define fdopen(FILDES,MODE) fdopen_unlocked(FILDES,MODE)
+#define freopen(PATH,MODE,STREAM) freopen_unlocked(PATH,MODE,STREAM)
+
+/* The compiler is not a multi-threaded application and therefore we
+   do not have to use the locking functions.  In fact, using the locking
+   functions can cause the compiler to be significantly slower under
+   I/O bound conditions (such as -g -O0 on very large source files).
+
+   HAVE_DECL_PUTC_UNLOCKED actually indicates whether or not the stdio
+   code is multi-thread safe by default.  If it is set to 0, then do
+   not worry about using the _unlocked functions.
+
+   fputs_unlocked, fwrite_unlocked, and fprintf_unlocked are
+   extensions and need to be prototyped by hand (since we do not
+   define _GNU_SOURCE).  */
+
+#if defined HAVE_DECL_PUTC_UNLOCKED && HAVE_DECL_PUTC_UNLOCKED
+
+# ifdef HAVE_PUTC_UNLOCKED
+#  undef putc
+#  define putc(C, Stream) putc_unlocked (C, Stream)
+# endif
+# ifdef HAVE_PUTCHAR_UNLOCKED
+#  undef putchar
+#  define putchar(C) putchar_unlocked (C)
+# endif
+# ifdef HAVE_GETC_UNLOCKED
+#  undef getc
+#  define getc(Stream) getc_unlocked (Stream)
+# endif
+# ifdef HAVE_GETCHAR_UNLOCKED
+#  undef getchar
+#  define getchar() getchar_unlocked ()
+# endif
+# ifdef HAVE_FPUTC_UNLOCKED
+#  undef fputc
+#  define fputc(C, Stream) fputc_unlocked (C, Stream)
+# endif
+
+# ifdef HAVE_CLEARERR_UNLOCKED
+#  undef clearerr
+#  define clearerr(Stream) clearerr_unlocked (Stream)
+#  if defined (HAVE_DECL_CLEARERR_UNLOCKED) && !HAVE_DECL_CLEARERR_UNLOCKED
+extern void clearerr_unlocked (FILE *);
+#  endif
+# endif
+# ifdef HAVE_FEOF_UNLOCKED
+#  undef feof
+#  define feof(Stream) feof_unlocked (Stream)
+#  if defined (HAVE_DECL_FEOF_UNLOCKED) && !HAVE_DECL_FEOF_UNLOCKED
+extern int feof_unlocked (FILE *);
+#  endif
+# endif
+# ifdef HAVE_FILENO_UNLOCKED
+#  undef fileno
+#  define fileno(Stream) fileno_unlocked (Stream)
+#  if defined (HAVE_DECL_FILENO_UNLOCKED) && !HAVE_DECL_FILENO_UNLOCKED
+extern int fileno_unlocked (FILE *);
+#  endif
+# endif
+# ifdef HAVE_FFLUSH_UNLOCKED
+#  undef fflush
+#  define fflush(Stream) fflush_unlocked (Stream)
+#  if defined (HAVE_DECL_FFLUSH_UNLOCKED) && !HAVE_DECL_FFLUSH_UNLOCKED
+extern int fflush_unlocked (FILE *);
+#  endif
+# endif
+# ifdef HAVE_FGETC_UNLOCKED
+#  undef fgetc
+#  define fgetc(Stream) fgetc_unlocked (Stream)
+#  if defined (HAVE_DECL_FGETC_UNLOCKED) && !HAVE_DECL_FGETC_UNLOCKED
+extern int fgetc_unlocked (FILE *);
+#  endif
+# endif
+# ifdef HAVE_FGETS_UNLOCKED
+#  undef fgets
+#  define fgets(S, n, Stream) fgets_unlocked (S, n, Stream)
+#  if defined (HAVE_DECL_FGETS_UNLOCKED) && !HAVE_DECL_FGETS_UNLOCKED
+extern char *fgets_unlocked (char *, int, FILE *);
+#  endif
+# endif
+# ifdef HAVE_FPUTS_UNLOCKED
+#  undef fputs
+#  define fputs(String, Stream) fputs_unlocked (String, Stream)
+#  if defined (HAVE_DECL_FPUTS_UNLOCKED) && !HAVE_DECL_FPUTS_UNLOCKED
+extern int fputs_unlocked (const char *, FILE *);
+#  endif
+# endif
+# ifdef HAVE_FERROR_UNLOCKED
+#  undef ferror
+#  define ferror(Stream) ferror_unlocked (Stream)
+#  if defined (HAVE_DECL_FERROR_UNLOCKED) && !HAVE_DECL_FERROR_UNLOCKED
+extern int ferror_unlocked (FILE *);
+#  endif
+# endif
+# ifdef HAVE_FREAD_UNLOCKED
+#  undef fread
+#  define fread(Ptr, Size, N, Stream) fread_unlocked (Ptr, Size, N, Stream)
+#  if defined (HAVE_DECL_FREAD_UNLOCKED) && !HAVE_DECL_FREAD_UNLOCKED
+extern size_t fread_unlocked (void *, size_t, size_t, FILE *);
+#  endif
+# endif
+# ifdef HAVE_FWRITE_UNLOCKED
+#  undef fwrite
+#  define fwrite(Ptr, Size, N, Stream) fwrite_unlocked (Ptr, Size, N, Stream)
+#  if defined (HAVE_DECL_FWRITE_UNLOCKED) && !HAVE_DECL_FWRITE_UNLOCKED
+extern size_t fwrite_unlocked (const void *, size_t, size_t, FILE *);
+#  endif
+# endif
+# ifdef HAVE_FPRINTF_UNLOCKED
+#  undef fprintf
+/* We can't use a function-like macro here because we don't know if
+   we have varargs macros.  */
+#  define fprintf fprintf_unlocked
+#  if defined (HAVE_DECL_FPRINTF_UNLOCKED) && !HAVE_DECL_FPRINTF_UNLOCKED
+extern int fprintf_unlocked (FILE *, const char *, ...);
+#  endif
+# endif
+
+#endif
+
+/* ??? Glibc's fwrite/fread_unlocked macros cause
+   "warning: signed and unsigned type in conditional expression".  */
+#undef fread_unlocked
+#undef fwrite_unlocked
+
+#include <sys/types.h>
+#include <errno.h>
+
+#if !defined (errno) && defined (HAVE_DECL_ERRNO) && !HAVE_DECL_ERRNO
+extern int errno;
+#endif
+
+/* Some of glibc's string inlines cause warnings.  Plus we'd rather
+   rely on (and therefore test) GCC's string builtins.  */
+#define __NO_STRING_INLINES
+
+#ifdef STRING_WITH_STRINGS
+# include <string.h>
+# include <strings.h>
+#else
+# ifdef HAVE_STRING_H
+#  include <string.h>
+# else
+#  ifdef HAVE_STRINGS_H
+#   include <strings.h>
+#  endif
+# endif
+#endif
+
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if HAVE_LIMITS_H
+# include <limits.h>
+#endif
+
+/* Infrastructure for defining missing _MAX and _MIN macros.  Note that
+   macros defined with these cannot be used in #if.  */
+
+/* The extra casts work around common compiler bugs.  */
+#define INTTYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+/* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
+   It is necessary at least when t == time_t.  */
+#define INTTYPE_MINIMUM(t) ((t) (INTTYPE_SIGNED (t) \
+                             ? ~ (t) 0 << (sizeof(t) * CHAR_BIT - 1) : (t) 0))
+#define INTTYPE_MAXIMUM(t) ((t) (~ (t) 0 - INTTYPE_MINIMUM (t)))
+
+/* Use that infrastructure to provide a few constants.  */
+#ifndef UCHAR_MAX
+# define UCHAR_MAX INTTYPE_MAXIMUM (unsigned char)
+#endif
+
+#ifdef TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  ifdef HAVE_TIME_H
+#   include <time.h>
+#  endif
+# endif
+#endif
+
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#else
+# ifdef HAVE_SYS_FILE_H
+#  include <sys/file.h>
+# endif
+#endif
+
+#ifdef HAVE_LOCALE_H
+# include <locale.h>
+#endif
+
+#ifdef HAVE_LANGINFO_CODESET
+# include <langinfo.h>
+#endif
+
+#ifndef HAVE_SETLOCALE
+# define setlocale(category, locale) (locale)
+#endif
+
+#ifdef ENABLE_NLS
+#include <libintl.h>
+#else
+/* Stubs.  */
+# undef dgettext
+# define dgettext(package, msgid) (msgid)
+#endif
+
+#ifndef _
+# define _(msgid) dgettext (PACKAGE, msgid)
+#endif
+
+#ifndef N_
+# define N_(msgid) msgid
+#endif
+
+/* Some systems define these in, e.g., param.h.  We undefine these names
+   here to avoid the warnings.  We prefer to use our definitions since we
+   know they are correct.  */
+
+#undef MIN
+#undef MAX
+#define MIN(X,Y) ((X) < (Y) ? (X) : (Y))
+#define MAX(X,Y) ((X) > (Y) ? (X) : (Y))
+
+/* The HAVE_DECL_* macros are three-state, undefined, 0 or 1.  If they
+   are defined to 0 then we must provide the relevant declaration
+   here.  These checks will be in the undefined state while configure
+   is running so be careful to test "defined (HAVE_DECL_*)".  */
+
+#if defined (HAVE_DECL_ABORT) && !HAVE_DECL_ABORT
+extern void abort (void);
+#endif
+
+#if HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+
+/* Test if something is a normal file.  */
+#ifndef S_ISREG
+#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#endif
+
+/* Test if something is a directory.  */
+#ifndef S_ISDIR
+#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+#endif
+
+/* Test if something is a character special file.  */
+#ifndef S_ISCHR
+#define S_ISCHR(m) (((m) & S_IFMT) == S_IFCHR)
+#endif
+
+/* Test if something is a block special file.  */
+#ifndef S_ISBLK
+#define S_ISBLK(m) (((m) & S_IFMT) == S_IFBLK)
+#endif
+
+/* Test if something is a socket.  */
+#ifndef S_ISSOCK
+# ifdef S_IFSOCK
+#   define S_ISSOCK(m) (((m) & S_IFMT) == S_IFSOCK)
+# else
+#   define S_ISSOCK(m) 0
+# endif
+#endif
+
+/* Test if something is a FIFO.  */
+#ifndef S_ISFIFO
+# ifdef S_IFIFO
+#  define S_ISFIFO(m) (((m) & S_IFMT) == S_IFIFO)
+# else
+#  define S_ISFIFO(m) 0
+# endif
+#endif
+
+/* Approximate O_NOCTTY and O_BINARY.  */
+#ifndef O_NOCTTY
+#define O_NOCTTY 0
+#endif
+#ifndef O_BINARY
+# define O_BINARY 0
+#endif
+
+/* Filename handling macros.  */
+#include "filenames.h"
+
+/* Get libiberty declarations.  */
+#include "libiberty.h"
+#include "safe-ctype.h"
+
+/* 1 if we have C99 designated initializers.
+
+   ??? C99 designated initializers are not supported by most C++
+   compilers, including G++.  -- gdr, 2005-05-18  */
+#if !defined(HAVE_DESIGNATED_INITIALIZERS)
+#define HAVE_DESIGNATED_INITIALIZERS \
+  ((!defined(__cplusplus) && (GCC_VERSION >= 2007)) \
+   || (__STDC_VERSION__ >= 199901L))
+#endif
+
+/* Be conservative and only use enum bitfields with GCC.
+   FIXME: provide a complete autoconf test for buggy enum bitfields.  */
+
+#if (GCC_VERSION > 2000)
+#define ENUM_BITFIELD(TYPE) __extension__ enum TYPE
+#else
+#define ENUM_BITFIELD(TYPE) unsigned int
+#endif
+
+#ifndef offsetof
+#define offsetof(TYPE, MEMBER)	((size_t) &((TYPE *) 0)->MEMBER)
+#endif
+
+/* __builtin_expect(A, B) evaluates to A, but notifies the compiler that
+   the most likely value of A is B.  This feature was added at some point
+   between 2.95 and 3.0.  Let's use 3.0 as the lower bound for now.  */
+#if (GCC_VERSION < 3000)
+#define __builtin_expect(a, b) (a)
+#endif
+
+/* Provide a fake boolean type.  We make no attempt to use the
+   C99 _Bool, as it may not be available in the bootstrap compiler,
+   and even if it is, it is liable to be buggy.  
+   This must be after all inclusion of system headers, as some of
+   them will mess us up.  */
+#undef bool
+#undef true
+#undef false
+#undef TRUE
+#undef FALSE
+
+#ifndef __cplusplus
+#define bool unsigned char
+#endif
+#define true 1
+#define false 0
+
+/* Some compilers do not allow the use of unsigned char in bitfields.  */
+#define BOOL_BITFIELD unsigned int
+
+/* Poison identifiers we do not want to use.  */
+#if (GCC_VERSION >= 3000)
+#undef calloc
+#undef strdup
+#undef malloc
+#undef realloc
+ #pragma GCC poison calloc strdup
+ #pragma GCC poison malloc realloc
+
+/* Libiberty macros that are no longer used in GCC.  */
+#undef ANSI_PROTOTYPES
+#undef PTR_CONST
+#undef LONG_DOUBLE
+#undef VPARAMS
+#undef VA_OPEN
+#undef VA_FIXEDARG
+#undef VA_CLOSE
+#undef VA_START
+ #pragma GCC poison ANSI_PROTOTYPES PTR_CONST LONG_DOUBLE VPARAMS VA_OPEN \
+  VA_FIXEDARG VA_CLOSE VA_START
+
+/* Note: not all uses of the `index' token (e.g. variable names and
+   structure members) have been eliminated.  */
+#undef bcopy
+#undef bzero
+#undef bcmp
+#undef rindex
+ #pragma GCC poison bcopy bzero bcmp rindex
+
+#endif /* GCC >= 3.0 */
+#endif /* ! LIBCPP_SYSTEM_H */