ClickHouse/cmake/find/capnp.cmake

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CMake
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option (ENABLE_CAPNP "Enable Cap'n Proto" ${ENABLE_LIBRARIES})
if (NOT ENABLE_CAPNP)
if (USE_INTERNAL_CAPNP_LIBRARY)
message (${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal capnproto library with ENABLE_CAPNP=OFF")
endif()
return()
endif()
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option (USE_INTERNAL_CAPNP_LIBRARY "Set to FALSE to use system capnproto library instead of bundled" ${NOT_UNBUNDLED})
if(NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/capnproto/CMakeLists.txt")
if(USE_INTERNAL_CAPNP_LIBRARY)
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message(WARNING "submodule contrib/capnproto is missing. to fix try run: \n git submodule update --init")
message(${RECONFIGURE_MESSAGE_LEVEL} "cannot find internal capnproto")
set(USE_INTERNAL_CAPNP_LIBRARY 0)
endif()
set(MISSING_INTERNAL_CAPNP_LIBRARY 1)
endif()
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# FIXME: refactor to use `add_library(… IMPORTED)` if possible.
if (NOT USE_INTERNAL_CAPNP_LIBRARY)
find_library (KJ kj)
find_library (CAPNP capnp)
find_library (CAPNPC capnpc)
if(KJ AND CAPNP AND CAPNPC)
set (CAPNP_LIBRARIES ${CAPNPC} ${CAPNP} ${KJ})
else()
message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find system capnproto")
endif()
endif()
if (CAPNP_LIBRARIES)
set (USE_CAPNP 1)
elseif(NOT MISSING_INTERNAL_CAPNP_LIBRARY)
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set (CAPNP_LIBRARIES capnpc)
set (USE_CAPNP 1)
set (USE_INTERNAL_CAPNP_LIBRARY 1)
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endif ()
message (STATUS "Using capnp=${USE_CAPNP}: ${CAPNP_LIBRARIES}")