Avoid EOVERFLOW from stat() calls due to overflowing inode numbers. The btrfs filesystem now uses 64-bit inode numbers even on 32-bit systems. This can lead to spurious stat() failures, where EOVERFLOW is returned because the inode number does not fit into the 32-bit stat structure, even when the caller is not interested in the inode number. This patch builds with _FILE_OFFSET_BITS == 64 when possible, and deals with integers that may be too large to fit into a Lisp fixnum. For more information, see xemacs-patches message <CAHCOHQk_mPM6WgFChBsGafqhuazep6VED7swFoqfFXOV1r8org@mail.gmail.com>.

--- a/configure.ac	Tue Mar 05 08:55:56 2013 +0100
+++ b/configure.ac	Wed Mar 06 08:32:17 2013 -0700
@@ -2721,6 +2721,11 @@
 dnl check for long file names
 AC_SYS_LONG_FILE_NAMES
 
+dnl check for large file support
+AC_SYS_LARGEFILE
+AC_FUNC_FSEEKO
+AC_CHECK_SIZEOF(off_t)
+
 dnl -lm is required for floating point support, among other things
 AC_CHECK_FUNC(sin, ,AC_CHECK_LIB(m, sin))