doxygen: guard doxywizard behind a build_option disabled by default.

srcpkgs/doxygen-gui

@@ -1 +0,0 @@
-doxygen

srcpkgs/doxygen/template

@@ -1,7 +1,7 @@
 # Template file for 'doxygen'
 pkgname=doxygen
 version=1.8.15
-revision=1
+revision=2
 build_style=cmake
 hostmakedepends="perl python flex"
 short_desc="Source code documentation generator tool"
@@ -11,19 +11,17 @@ homepage="http://www.doxygen.org/"
 distfiles="http://doxygen.nl/files/doxygen-${version}.src.tar.gz"
 checksum=bd9c0ec462b6a9b5b41ede97bede5458e0d7bb40d4cfa27f6f622eb33c59245d
 
+build_options="wizard"
+desc_option_wizard="build Qt5 GUI configuration tool, doxywizard"
+
+if [ "$build_option_wizard" ]; then
+	configure_args+=" -Dbuild_wizard=1"
+	makedepends+=" qt5-devel"
+fi
+
 post_install() {
 	vman doc/doxygen.1
+	if [ "$build_option_wizard" ]; then
+		vman doc/doxywizard.1
+	fi
 }
-
-if [ -z "$CROSS_BUILD" ]; then
-	makedepends="qt5-devel"
-	configure_args+=" -Dbuild_wizard=1"
-	doxygen-gui_package() {
-		depends="${sourcepkg}>=${version}_${revision}"
-		short_desc+=" - GUI configuration tool"
-		pkg_install() {
-			vmove usr/bin/doxywizard
-			vman doc/doxywizard.1
-		}
-	}
-fi