ClickHouse/cmake/find_gtest.cmake

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CMake
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option (USE_INTERNAL_GTEST_LIBRARY "Set to FALSE to use system Google Test instead of bundled" ${NOT_UNBUNDLED})
if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/googletest/googletest/CMakeLists.txt")
if (USE_INTERNAL_GTEST_LIBRARY)
message (WARNING "submodule contrib/googletest is missing. to fix try run: \n git submodule update --init --recursive")
set (USE_INTERNAL_GTEST_LIBRARY 0)
endif ()
set (MISSING_INTERNAL_GTEST_LIBRARY 1)
endif ()
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if(NOT USE_INTERNAL_GTEST_LIBRARY)
# TODO: autodetect of GTEST_SRC_DIR by EXISTS /usr/src/googletest/CMakeLists.txt
if(NOT GTEST_SRC_DIR)
find_package(GTest)
endif()
endif()
if (NOT GTEST_SRC_DIR AND NOT GTEST_INCLUDE_DIRS AND NOT MISSING_INTERNAL_GTEST_LIBRARY)
set (USE_INTERNAL_GTEST_LIBRARY 1)
set (GTEST_MAIN_LIBRARIES gtest_main)
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set (GTEST_LIBRARIES gtest)
set (GTEST_INCLUDE_DIRS ${ClickHouse_SOURCE_DIR}/contrib/googletest/googletest)
endif ()
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if((GTEST_INCLUDE_DIRS AND GTEST_MAIN_LIBRARIES) OR GTEST_SRC_DIR)
set(USE_GTEST 1)
endif()
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message (STATUS "Using gtest=${USE_GTEST}: ${GTEST_INCLUDE_DIRS} : ${GTEST_LIBRARIES}, ${GTEST_MAIN_LIBRARIES} : ${GTEST_SRC_DIR}")