Merge branch 'propagate-cmake_configuration_types'

* propagate-cmake_configuration_types:
  ENH: Propagate CMAKE_CONFIGURATION_TYPES to all external projects

CMakeLists.txt

@@ -85,6 +85,8 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 endif()
 if(NOT CMAKE_CONFIGURATION_TYPES)
   mark_as_superbuild(VARS CMAKE_BUILD_TYPE ALL_PROJECTS)
+else()
+  mark_as_superbuild(VARS CMAKE_CONFIGURATION_TYPES ALL_PROJECTS)
 endif()
 
 mark_as_superbuild(