CMake: Fix static build with a reduce number of plugins

This changeset allows building Qt Creator statically with a reduced number
of plugins, especially without QmlDesigner.

Change-Id: I0050c72d3959fe43edae60bd47ecab9c0ee544b3
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/designer/CMakeLists.txt

@@ -37,7 +37,7 @@ extend_qtc_plugin(Designer
   SOURCES gotoslot_test.cpp
 )
 
-if (QTC_STATIC_BUILD)
+if (QTC_STATIC_BUILD AND TARGET Designer)
   get_target_property(_designerType Qt5::Designer TYPE)
   if (${_designerType} STREQUAL "STATIC_LIBRARY")
     extend_qtc_target(Designer PUBLIC_DEFINES QT_DESIGNER_STATIC)

src/plugins/qmldesigner/CMakeLists.txt

@@ -58,7 +58,7 @@ add_qtc_plugin(QmlDesigner
 include(qmldesignercore.cmake)
 extend_with_qmldesigner_core(QmlDesigner)
 
-if (QTC_STATIC_BUILD)
+if (QTC_STATIC_BUILD AND TARGET QmlDesigner)
   get_target_property(_designerType Qt5::Designer TYPE)
   if (${_designerType} STREQUAL "STATIC_LIBRARY")
     extend_qtc_target(QmlDesigner PUBLIC_DEFINES QT_DESIGNER_STATIC)

src/shared/designerintegrationv2/CMakeLists.txt

@@ -12,3 +12,10 @@ add_qtc_library(designerintegrationv2 STATIC
     widgethostconstants.h
     widgethost.cpp widgethost.h
 )
+
+if (QTC_STATIC_BUILD)
+  get_target_property(_designerType Qt5::Designer TYPE)
+  if (${_designerType} STREQUAL "STATIC_LIBRARY")
+    extend_qtc_target(designerintegrationv2 PUBLIC_DEFINES QT_DESIGNER_STATIC)
+  endif()
+endif()