UseCTK.cmake now sets the QT_QMAKE_EXECUTABLE variable

It ensures the application is using the same Qt used for building CTK.

CMake/UseCTK.cmake.in

@@ -23,14 +23,18 @@
 # be INCLUDED in a project to load the needed compiler and linker
 # settings to use CTK.
 #
- 
+
 IF(NOT CTK_USE_FILE_INCLUDED)
   SET(CTK_USE_FILE_INCLUDED 1)
-  
+
   # Add include directories needed to use CTK.
   INCLUDE_DIRECTORIES(${CTK_INCLUDE_DIRS})
- 
+
   # Add link directories needed to use CTK.
   # LINK_DIRECTORIES(${CTK_LIBRARY_DIRS} ${CTK_EXTERNAL_LIBRARY_DIRS})
- 
+
+  if (NOT DEFINED QT_QMAKE_EXECUTABLE)
+    set(QT_QMAKE_EXECUTABLE ${CTK_QT_QMAKE_EXECUTABLE})
+  endif()
+
 ENDIF()