Fix feature dependencies

Skip build of linquist, assistant, designer, pixeltool,
qdbusviewer and distancefieldgenerator on disabled features.

This also fixes build with -no-feature-action configuration.

Change-Id: I0b7de9bae9c33ddb47d83ed577ec0e404bde360d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

src/linguist/linguist.pro

@@ -3,7 +3,12 @@ SUBDIRS  = \
     lrelease \
     lupdate \
     lconvert
-!no-png:qtHaveModule(widgets):qtConfig(process): SUBDIRS += linguist
+!no-png:qtHaveModule(widgets) {
+    QT_FOR_CONFIG += widgets
+    qtConfig(process):qtConfig(pushbutton):qtConfig(toolbutton) {
+        SUBDIRS += linguist
+    }
+}
 
 qtNomakeTools( \
     linguist \

src/qdbus/qdbus.pro

 TEMPLATE = subdirs
 QT_FOR_CONFIG += xml
 qtConfig(dom): SUBDIRS = qdbus
-qtHaveModule(widgets): SUBDIRS += qdbusviewer
+qtHaveModule(widgets) {
+    QT_FOR_CONFIG += widgets
+    qtConfig(dialogbuttonbox):qtConfig(inputdialog):qtConfig(messagebox):qtConfig(menu) {
+        SUBDIRS += qdbusviewer
+    }
+}

src/src.pro

@@ -4,13 +4,15 @@ qtHaveModule(widgets) {
     no-png {
         message("Some graphics-related tools are unavailable without PNG support")
     } else {
-        SUBDIRS = assistant \
-                  pixeltool \
-                  designer
-
-        qtHaveModule(quick):qtConfig(thread): SUBDIRS += distancefieldgenerator
-
-        linguist.depends = designer
+        QT_FOR_CONFIG += widgets
+        qtConfig(pushbutton):qtConfig(toolbutton) {
+            SUBDIRS = assistant \
+                      designer \
+                      pixeltool
+
+            linguist.depends = designer
+        }
+        qtHaveModule(quick):qtConfig(thread):qtConfig(toolbutton): SUBDIRS += distancefieldgenerator
     }
 }