improved…

blackdynamite.cmake
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			if(${PROJECT_SOURCE_DIR}/third-party/${BLACKDYNAMITE_ARCHIVE})
			set(_blackdynamite_download_command
			URL ${PROJECT_SOURCE_DIR}/third-party/${BLACKDYNAMITE_ARCHIVE})
			else()
			set(_blackdynamite_download_command
			GIT_REPOSITORY ${BLACKDYNAMITE_GIT}
			GIT_TAG ${BLACKDYNAMITE_VERSION}
			)
			endif()

			if(CMAKE_VERSION VERSION_GREATER 3.1)
			set(_extra_options
			UPDATE_DISCONNECTED 1
			DOWNLOAD_NO_PROGRESS 1
			EXCLUDE_FROM_ALL 1
			)
			endif()

			ExternalProject_Add(blackdynamite
			PREFIX ${PROJECT_BINARY_DIR}/third-party
			${_blackdynamite_download_command}
			${_extra_options}
			CMAKE_ARGS <SOURCE_DIR>/
			CMAKE_CACHE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR> -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE} -DCMAKE_CXX_COMPILER:PATH=${CMAKE_CXX_COMPILER}
			BUILD_COMMAND make
			INSTALL_COMMAND make install
			LOG_DOWNLOAD 1
			LOG_CONFIGURE 1
			LOG_BUILD 1
			LOG_INSTALL 1
			)


			set_third_party_shared_libirary_name(BLACKDYNAMITE_LIBRARIES blackdynamite)
			set(BLACKDYNAMITE_INCLUDE_DIR "${PROJECT_BINARY_DIR}/third-party/include/blackdynamite" CACHE PATH "")
			mark_as_advanced(
			BLACKDYNAMITE_LIBRARIES
			BLACKDYNAMITE_INCLUDE_DIR
			)

			package_add_extra_dependency(BlackDynamite blackdynamite)