--- enter-0.0.9.orig/configure.ac	2007-03-26 18:35:54.000000000 -0500
+++ enter-0.0.9/configure.ac	2012-11-07 02:41:16.137947211 -0500
@@ -52,6 +52,10 @@
 AC_CHECK_LIB([Imlib2], [imlib_context_new],,
 			AC_MSG_ERROR([You need to have Imlib2.]))
 
+AC_CHECK_LIB(X11, XClearWindow)
+
+AC_CHECK_LIB(Xext, XdbeQueryExtension)
+
 # Checks for header files.
 AC_SUBST([X_CFLAGS])
 AC_SUBST([X_LIBS])