ClickHouse/cmake/find/msgpack.cmake

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CMake
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option (ENABLE_MSGPACK "Enable msgpack library" ${ENABLE_LIBRARIES})
if(NOT ENABLE_MSGPACK)
if(USE_INTERNAL_MSGPACK_LIBRARY)
message (${RECONFIGURE_MESSAGE_LEVEL} "Cannot use internal msgpack with ENABLE_MSGPACK=OFF")
endif()
return()
endif()
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option (USE_INTERNAL_MSGPACK_LIBRARY "Set to FALSE to use system msgpack library instead of bundled" ON)
if(NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/msgpack-c/include/msgpack.hpp")
if(USE_INTERNAL_MSGPACK_LIBRARY)
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message(WARNING "Submodule contrib/msgpack-c is missing. To fix try run: \n git submodule update --init")
message (${RECONFIGURE_MESSAGE_LEVEL} "Cannot use internal msgpack")
set(USE_INTERNAL_MSGPACK_LIBRARY 0)
endif()
set(MISSING_INTERNAL_MSGPACK_LIBRARY 1)
endif()
if(NOT USE_INTERNAL_MSGPACK_LIBRARY)
find_path(MSGPACK_INCLUDE_DIR NAMES msgpack.hpp PATHS ${MSGPACK_INCLUDE_PATHS})
if(NOT MSGPACK_INCLUDE_DIR)
message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find system msgpack")
endif()
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endif()
if(NOT MSGPACK_INCLUDE_DIR AND NOT MISSING_INTERNAL_MSGPACK_LIBRARY)
set(MSGPACK_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/msgpack-c/include")
set(USE_INTERNAL_MSGPACK_LIBRARY 1)
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endif()
if (MSGPACK_INCLUDE_DIR)
set(USE_MSGPACK 1)
endif()
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message(STATUS "Using msgpack=${USE_MSGPACK}: ${MSGPACK_INCLUDE_DIR}")