diff -urN cupsddk-1.2.3.orig/configure.in cupsddk-1.2.3/configure.in
--- cupsddk-1.2.3.orig/configure.in	2007-10-05 22:42:17.000000000 +0200
+++ cupsddk-1.2.3/configure.in	2007-10-14 20:19:40.000000000 +0200
@@ -155,14 +155,16 @@
 AC_CHECK_HEADER(cups/cups.h,,AC_MSG_ERROR(CUPS headers are not installed!))
 
 dnl Check for FLTK...
-AC_PATH_PROG(FLTKCONFIG,fltk-config)
+AC_ARG_WITH([fltk], AS_HELP_STRING([--with-fltk], [Build with fltk library GUI (default: disabled)]))
 
-if test "x$FLTKCONFIG" = x; then
-#	AC_MSG_ERROR([Sorry, the CUPS DDK requires FLTK 1.1.x.])
-	GUILIBS=""
-else
-	CXXFLAGS="`$FLTKCONFIG --cflags` $CXXFLAGS"
-	GUILIBS="`$FLTKCONFIG --use-images --ldstaticflags`"
+if test "x$with_fltk" == "xyes"; then
+	AC_PATH_PROG(FLTKCONFIG,fltk-config)
+	if test "x$FLTKCONFIG" = x; then
+		AC_MSG_ERROR([Sorry, the CUPS DDK GUI requires FLTK 1.1.x.])
+	else
+		CXXFLAGS="`$FLTKCONFIG --cflags` $CXXFLAGS"
+		GUILIBS="`$FLTKCONFIG --use-images --ldstaticflags`"
+	fi
 fi
 
 AC_SUBST(FLTKCONFIG)