http://pkgs.fedoraproject.org/cgit/xscreensaver.git/tree/xscreensaver-5.11-conf264.patch

--- Makefile.in
+++ Makefile.in
@@ -99,8 +99,8 @@
 # or later, feel free.  Personally, I can't be bothered.
 #
 configure::
-	autoconf263
-	autoheader263
+	autoconf
+	autoheader
 	@TMP=configure.$$$$ ;						     \
 	echo "munging configure's --help message..." ;			     \
 	( perl -e '							     \
--- configure.in
+++ configure.in
@@ -315,7 +315,7 @@
 ###############################################################################
 
 AC_DEFUN(AC_PROG_CC_ANSI,
- [AC_PROG_CC
+ [AC_REQUIRE([AC_PROG_CC])
 
   if test -z "$GCC"; then
     # not using GCC