atk: add gir pkg option and disable it in cross builds.

srcpkgs/atk/template

@@ -1,10 +1,10 @@
 # Template build file for 'atk'.
 pkgname=atk
 version=2.8.0
-revision=2
+revision=3
 build_style=gnu-configure
 hostmakedepends="pkg-config"
-makedepends="libglib-devel>=2.34.0 gobject-introspection"
+makedepends="glib-devel>=2.36"
 short_desc="Set of interfaces for accessibility"
 maintainer="Juan RP <xtraeme@gmail.com>"
 homepage="http://www.gtk.org/"
@@ -23,13 +23,36 @@ long_desc="
  It also provides interfaces which an application can use to provide
  additional accessibility information to assistive technology tools."
 
+if [ "$CROSS_BUILD" ]; then
+	# needs glib-mkenums
+	hostmakedepends+=" glib-devel"
+fi
+
+# Package build options
+build_options="gir"
+desc_option_gir="Enable support for building gobject introspection data"
+
+# Disable gir for cross builds.
+if [ -z "$CROSS_BUILD" ]; then
+	build_options_default="gir"
+fi
+
+if [ "$build_option_gir" ]; then
+	configure_args+=" --enable-introspection"
+	makedepends+=" gobject-introspection"
+else
+	configure_args+=" --disable-introspection"
+fi
+
 atk-devel_package() {
 	depends="libglib-devel atk>=${version}"
-	short_desc="${short_desc} - development files"
+	short_desc+=" - development files"
 	pkg_install() {
 		vmove usr/include
 		vmove usr/lib/pkgconfig
-		vmove "usr/share/gir-*"
+		if [ "$build_option_gir" ]; then
+			vmove "usr/share/gir-*"
+		fi
 		vmove usr/share/gtk-doc
 	}
 }