ClickHouse/cmake/find/msgpack.cmake

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CMake
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option (USE_INTERNAL_MSGPACK_LIBRARY "Set to FALSE to use system msgpack library instead of bundled" ${NOT_UNBUNDLED})
if (USE_INTERNAL_MSGPACK_LIBRARY)
if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/msgpack-c/include/msgpack.hpp")
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message(WARNING "Submodule contrib/msgpack-c is missing. To fix try run: \n git submodule update --init --recursive")
set(USE_INTERNAL_MSGPACK_LIBRARY 0)
set(MISSING_INTERNAL_MSGPACK_LIBRARY 1)
endif()
endif()
if (USE_INTERNAL_MSGPACK_LIBRARY)
set(MSGPACK_INCLUDE_DIR ${ClickHouse_SOURCE_DIR}/contrib/msgpack-c/include)
else()
find_path(MSGPACK_INCLUDE_DIR NAMES msgpack.hpp PATHS ${MSGPACK_INCLUDE_PATHS})
endif()
message(STATUS "Using msgpack: ${MSGPACK_INCLUDE_DIR}")