--- configure.in.orig	2003-08-16 00:53:55.000000000 -0500
+++ configure.in	2011-10-26 07:05:16.000000000 -0500
@@ -19,8 +19,8 @@
 
 AC_PATH_X
 
-CFLAGS="-I $x_includes"
-LDFLAGS="-L/usr/local/lib -L$x_libraries -L$libdir"
+CFLAGS="$CFLAGS -I $x_includes"
+LDFLAGS="$LDFLAGS -L$x_libraries -L$libdir"
 CXXFLAGS="$CFLAGS -Wall"
 
 dnl Checks for libraries.