The custom ExternalProject.cmake module has been removed.
@@ -18,7 +18,7 @@
#
###########################################################################
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.8.2)
#-----------------------------------------------------------------------------
# See http://cmake.org/cmake/help/cmake-2-8-docs.html#section_Policies for details