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jcfr authored
All projects now: * systematically download archives or checkout sources in the top-level directory. * use variables like EP_SOURCE_DIR, EP_BINARY_DIR or EP_INSTALL_DIR This commit also: * updates top-level CMakeLists to explicitly set variables SUPERBUILD_TOPLEVEL_PROJECT and EXTERNAL_PROJECT_DIR options instead of relying on their implicit values. * includes CMake module ListToString where used. git-svn-id: http://svn.slicer.org/Slicer4/trunk@26528 3bd1e089-480b-0410-8dfb-8563597acbee
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