diff -r 9013911dbab2 libgo/Makefile.am
--- a/libgo/Makefile.am	Wed Jan 25 21:42:35 2012 -0800
+++ b/libgo/Makefile.am	Thu Jan 26 12:15:48 2012 -0800
@@ -449,6 +449,7 @@
 	runtime/go-now.c \
 	runtime/go-new-map.c \
 	runtime/go-new.c \
+	runtime/go-nosys.c \
 	runtime/go-panic.c \
 	runtime/go-print.c \
 	runtime/go-recover.c \
diff -r 9013911dbab2 libgo/configure.ac
--- a/libgo/configure.ac	Wed Jan 25 21:42:35 2012 -0800
+++ b/libgo/configure.ac	Thu Jan 26 12:15:48 2012 -0800
@@ -33,6 +33,8 @@
 
 AM_MAINTAINER_MODE
 
+AC_INCLUDES_DEFAULT
+
 AC_PROG_LD
 AC_PROG_RANLIB
 AC_CHECK_TOOL(OBJCOPY, objcopy, missing-objcopy)
@@ -465,6 +467,9 @@
 AM_CONDITIONAL(HAVE_STRERROR_R, test "$ac_cv_func_strerror_r" = yes)
 AM_CONDITIONAL(HAVE_WAIT4, test "$ac_cv_func_wait4" = yes)
 
+AC_CHECK_FUNCS(epoll_create1 faccessat fchmodat fchownat futimesat inotify_add_watch inotify_init inotify_rm_watch mkdirat mknodat openat renameat splice tee unlinkat unshare)
+AC_CHECK_TYPES([loff_t])
+
 CFLAGS_hold="$CFLAGS"
 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
 LIBS_hold="$LIBS"
@@ -519,7 +524,7 @@
 
 CFLAGS_hold=$CFLAGS
 CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE"
-AC_CHECK_TYPES(off64_t)
+AC_CHECK_TYPES([off64_t])
 CFLAGS=$CFLAGS_hold
 
 dnl Work out the size of the epoll_events struct on GNU/Linux.
diff -r 9013911dbab2 libgo/runtime/go-nosys.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgo/runtime/go-nosys.c	Thu Jan 26 12:15:48 2012 -0800
@@ -0,0 +1,192 @@
+/* go-nosys.c -- functions missing from system.
+
+   Copyright 2012 The Go Authors. All rights reserved.
+   Use of this source code is governed by a BSD-style
+   license that can be found in the LICENSE file.  */
+
+/* This file exists to provide definitions for functions that are
+   missing from libc, according to the configure script.  This permits
+   the Go syscall package to not worry about whether the functions
+   exist or not.  */
+
+#include "config.h"
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#ifndef HAVE_OFF64_T
+typedef signed int off64_t __attribute__ ((mode (DI)));
+#endif
+
+#ifndef HAVE_LOFF_T
+typedef off64_t loff_t;
+#endif
+
+#ifndef HAVE_EPOLL_CREATE1
+int
+epoll_create1 (int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_FACCESSAT
+int
+faccessat (int fd __attribute__ ((unused)),
+	   const char *pathname __attribute__ ((unused)),
+	   int mode __attribute__ ((unused)),
+	   int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_FCHMODAT
+int
+fchmodat (int dirfd __attribute__ ((unused)),
+	  const char *pathname __attribute__ ((unused)),
+	  mode_t mode __attribute__ ((unused)),
+	  int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_FCHOWNAT
+int
+fchownat (int dirfd __attribute__ ((unused)),
+	  const char *pathname __attribute__ ((unused)),
+	  uid_t owner __attribute__ ((unused)),
+	  gid_t group __attribute__ ((unused)),
+	  int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_FUTIMESAT
+int
+futimesat (int dirfd __attribute__ ((unused)),
+	   const char *pathname __attribute__ ((unused)),
+	   const struct timeval times[2] __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_INOTIFY_ADD_WATCH
+int
+inotify_add_watch (int fd __attribute__ ((unused)),
+		   const char* pathname __attribute__ ((unused)),
+		   uint32_t mask __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_INOTIFY_INIT
+int
+inotify_init (void)
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_INOTIFY_RM_WATCH
+int
+inotify_rm_watch (int fd __attribute__ ((unused)),
+		  uint32_t wd __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_MKDIRAT
+int
+mkdirat (int dirfd __attribute__ ((unused)),
+	 const char *pathname __attribute__ ((unused)),
+	 mode_t mode __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_MKNODAT
+int
+mknodat (int dirfd __attribute__ ((unused)),
+	 const char *pathname __attribute__ ((unused)),
+	 mode_t mode __attribute__ ((unused)),
+	 dev_t dev __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_OPENAT
+int
+openat (int dirfd __attribute__ ((unused)),
+	const char *pathname __attribute__ ((unused)),
+	int oflag __attribute__ ((unused)),
+	...)
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_RENAMEAT
+int
+renameat (int olddirfd __attribute__ ((unused)),
+	  const char *oldpath __attribute__ ((unused)),
+	  int newdirfd __attribute__ ((unused)),
+	  const char *newpath __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_SPLICE
+int
+splice (int fd __attribute__ ((unused)),
+	loff_t *off_in __attribute__ ((unused)),
+	int fd_out __attribute__ ((unused)),
+	loff_t *off_out __attribute__ ((unused)),
+	size_t len __attribute__ ((unused)),
+	unsigned int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_TEE
+int
+tee (int fd_in __attribute__ ((unused)),
+     int fd_out __attribute__ ((unused)),
+     size_t len __attribute__ ((unused)),
+     unsigned int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_UNLINKAT
+int
+unlinkat (int dirfd __attribute__ ((unused)),
+	  const char *pathname __attribute__ ((unused)),
+	  int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
+
+#ifndef HAVE_UNSHARE
+int
+unshare (int flags __attribute__ ((unused)))
+{
+  return ENOSYS;
+}
+#endif
