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This repository contains a generalized implementation for downloading an external project’s source at CMake’s configure step rather than as part of the main build. The primary advantage of this is that the project’s source code can then be included directly in the main CMake build using the add_subdirectory() command, making all of the external project’s targets, etc. available without any further effort. The technique is fully explained in the article available at:

An example as described in that article is provided here to demonstrate how to use the DownloadProject module. It uses googletest as the example, downloading and building trivial gtest and gmock test cases to show the technique.