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google-benchmark.cmake
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			package_declare(gbenchmark EXTERNAL
			DESCRIPTION "Add Google Benchmark support"
			SYSTEM AUTO third-party/cmake/gbenchmark.cmake
			EXCLUDE_FROM_ALL
			)

			package_get_option_name(gbenchmark _opt_name)
			package_add_third_party_script_variable(gbenchmark
			GBENCHMARK_VERSION "master")
			package_add_third_party_script_variable(gbenchmark
			GBENCHMARK_GIT "https://github.com/google/benchmark.git")