--- /dev/null
+macro(_build_gtest gtest_root)
+ include(ExternalProject)
+ ExternalProject_Add(googletest
+ SOURCE_DIR ${gtest_root}
+ CMAKE_ARGS -DBUILD_GMOCK=OFF -DBUILD_GTEST=ON
+ INSTALL_COMMAND ""
+ LOG_CONFIGURE ON
+ LOG_BUILD ON)
+
+ ExternalProject_Get_Property(googletest source_dir)
+ set(GTEST_INCLUDE_DIRS ${source_dir}/googletest/include)
+ set(GMOCK_INCLUDE_DIRS ${source_dir}/googlemock/include)
+
+ find_package(Threads REQUIRED)
+
+ ExternalProject_Get_Property(googletest binary_dir)
+ set(GTEST_LIBRARY_PATH ${binary_dir}/googletest/${CMAKE_FIND_LIBRARY_PREFIXES}gtest.a)
+ set(GTEST_LIBRARY gtest)
+ add_library(${GTEST_LIBRARY} STATIC IMPORTED)
+ set_target_properties(${GTEST_LIBRARY} PROPERTIES
+ INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIRS}"
+ IMPORTED_LOCATION ${GTEST_LIBRARY_PATH}
+ IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+ IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+ add_dependencies(${GTEST_LIBRARY} googletest)
+ set(GTEST_LIBRARIES ${GTEST_LIBRARY})
+
+ set(GTEST_MAIN_LIBRARY_PATH ${binary_dir}/googletest/${CMAKE_FIND_LIBRARY_PREFIXES}gtest_main.a)
+ set(GTEST_MAIN_LIBRARY gtest_main)
+ add_library(${GTEST_MAIN_LIBRARY} STATIC IMPORTED)
+ set_target_properties(${GTEST_MAIN_LIBRARY} PROPERTIES
+ INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIRS}"
+ IMPORTED_LOCATION ${GTEST_MAIN_LIBRARY_PATH}
+ IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+ add_dependencies(${GTEST_MAIN_LIBRARY} googletest)
+
+ set(GMOCK_LIBRARY_PATH ${binary_dir}/googlemock/${CMAKE_FIND_LIBRARY_PREFIXES}gmock.a)
+ set(GMOCK_LIBRARY gmock)
+ add_library(${GMOCK_LIBRARY} STATIC IMPORTED)
+ set_target_properties(${GMOCK_LIBRARY} PROPERTIES
+ INTERFACE_INCLUDE_DIRECTORIES "${GMOCK_INCLUDE_DIRS}"
+ IMPORTED_LOCATION "${GMOCK_LIBRARY_PATH}"
+ IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+ IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+ add_dependencies(${GMOCK_LIBRARY} googletest)
+
+ set(GMOCK_MAIN_LIBRARY_PATH ${binary_dir}/googlemock/${CMAKE_FIND_LIBRARY_PREFIXES}gmock_main.a)
+ set(GMOCK_MAIN_LIBRARY gmock_main)
+ add_library(${GMOCK_MAIN_LIBRARY} STATIC IMPORTED)
+ set_target_properties(${GMOCK_MAIN_LIBRARY} PROPERTIES
+ INTERFACE_INCLUDE_DIRECTORIES "${GMOCK_INCLUDE_DIRS}"
+ IMPORTED_LOCATION ${GMOCK_MAIN_LIBRARY_PATH}
+ IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+ IMPORTED_LINK_INTERFACE_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
+ add_dependencies(${GMOCK_MAIN_LIBRARY} ${GTEST_LIBRARY})
+endmacro()
+
+find_path(GTEST_ROOT src/gtest.cc
+ HINTS $ENV{GTEST_ROOT}
+ PATHS /usr/src/googletest/googletest /usr/src/gtest)
+
+if(EXISTS ${GTEST_ROOT})
+ message(STATUS "Found googletest: ${GTEST_ROOT}")
+ _build_gtest(${GTEST_ROOT})
+else()
+ message(SEND_ERROR "Could NOT find googletest")
+endif()