Qt: add config option to build libQtDeclarative module

Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Daniel Nyström <daniel.nystrom@timeterminal.se>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/qt/Config.in

@@ -378,4 +378,11 @@ config BR2_PACKAGE_QT_SCRIPTTOOLS
 	  Build the Qt Script Tools module.
 	  if unsure, say n.
 
+config BR2_PACKAGE_QT_DECLARATIVE
+	bool "Declarative module"
+	depends on BR2_PACKAGE_QT_GUI_MODULE
+	help
+	  Build the Qt Declarative Module for qml support
+	  if unsure, say n.
+
 endif # BR2_PACKAGE_QT

package/qt/qt.mk

@@ -398,6 +398,12 @@ else
 QT_CONFIGURE_OPTS += -no-stl
 endif
 
+ifeq ($(BR2_PACKAGE_QT_DECLARATIVE),y)
+QT_CONFIGURE_OPTS += -declarative
+else
+QT_CONFIGURE_OPTS += -no-declarative
+endif
+
 # ccache and precompiled headers don't play well together
 ifeq ($(BR2_CCACHE),y)
 QT_CONFIGURE_OPTS += -no-pch
@@ -535,6 +541,9 @@ endif
 ifeq ($(BR2_PACKAGE_QT_SCRIPTTOOLS),y)
 QT_INSTALL_LIBS    += QtScriptTools
 endif
+ifeq ($(BR2_PACKAGE_QT_DECLARATIVE),y)
+QT_INSTALL_LIBS    += QtDeclarative
+endif
 ifeq ($(BR2_PACKAGE_QT_QT3SUPPORT),y)
 QT_INSTALL_LIBS    += Qt3Support
 endif