Index: configure.ac
===================================================================
RCS file: /cvs/gstreamer/gst-plugins-base/configure.ac,v
retrieving revision 1.538
diff -u -r1.538 configure.ac
--- configure.ac	9 May 2005 21:37:17 -0000	1.538
+++ configure.ac	2 Jun 2005 10:54:33 -0000
@@ -414,6 +414,11 @@
 GST_CHECK_FEATURE(X, [X libraries and plugins],
                   [ximagesink], [
   AC_PATH_XTRA
+  ac_cflags_save="$CFLAGS"
+  ac_cppflags_save="$CPPFLAGS"
+  CFLAGS="$CFLAGS $X_CFLAGS"
+  CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+
   dnl now try to find the HEADER
   AC_CHECK_HEADER(X11/Xlib.h, HAVE_X="yes", HAVE_X="no")
 
@@ -430,6 +435,8 @@
     AC_SUBST(X_LIBS)
   fi
   AC_SUBST(HAVE_X)
+  CFLAGS="$ac_cflags_save"
+  CPPFLAGS="$ac_cppflags_save"
 ])
   
 dnl *** XVideo ***