56f4949c Help: Add notes for topic 'ExternalProject_CMAKE_CACHE_DEFAULT_ARGS'
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+ExternalProject_CMAKE_CACHE_DEFAULT_ARGS
+----------------------------------------
+
+* The :module:`ExternalProject` module ``ExternalProject_Add`` function
+ learned a new ``CMAKE_CACHE_DEFAULT_ARGS`` option to initialize cache
+ values in the external project without setting them on future builds.