--- gforth/configure.in	2008/10/06 20:59:17	1.245
+++ gforth/configure.in	2008/10/09 21:13:49	1.247
@@ -669,6 +669,15 @@ case "$host_os" in
                 #http://mail.python.org/pipermail/pythonmac-sig/2005-October/015190.html
                 AC_DEFINE_UNQUOTED(MACOSX_DEPLOYMENT_TARGET,"10.3",[an environment variable value needed by libtool on some MacOS X versions])
 		;;
+	*linux*)
+		DIRSEP="/"
+		PATHSEP=":"
+		DEFAULTSYSTEMPREFIX=""
+		if test "$wordsize" = 64; then
+		   LTDL_LIBRARY_PATH=`grep 64 /etc/ld.so.conf | tr '[\n]' [:] | sed -e 's/:$//'`
+		   AC_DEFINE_UNQUOTED(LTDL_LIBRARY_PATH,"$LTDL_LIBRARY_PATH",[Define LTDL_LIBRARY_PATH for 64 bit Linux])
+		fi
+		;;
 	*)
 		DIRSEP="/"
 		PATHSEP=":"