ClickHouse/contrib/grpc-cmake/CMakeLists.txt

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CMake
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set(ENABLE_GRPC_DEFAULT ${ENABLE_LIBRARIES})
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option(ENABLE_GRPC "Use gRPC" ${ENABLE_GRPC_DEFAULT})
if(NOT ENABLE_GRPC)
message(STATUS "Not using gRPC")
return()
endif()
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set(_gRPC_SOURCE_DIR "${ClickHouse_SOURCE_DIR}/contrib/grpc")
set(_gRPC_BINARY_DIR "${ClickHouse_BINARY_DIR}/contrib/grpc")
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# Use re2 from ClickHouse contrib, not from gRPC third_party.
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set(gRPC_RE2_PROVIDER "clickhouse" CACHE STRING "" FORCE)
set(_gRPC_RE2_INCLUDE_DIR "")
set(_gRPC_RE2_LIBRARIES ch_contrib::re2)
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# Use zlib from ClickHouse contrib, not from gRPC third_party.
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set(gRPC_ZLIB_PROVIDER "clickhouse" CACHE STRING "" FORCE)
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set(_gRPC_ZLIB_INCLUDE_DIR "")
set(_gRPC_ZLIB_LIBRARIES ch_contrib::zlib)
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# Use protobuf from ClickHouse contrib, not from gRPC third_party.
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set(gRPC_PROTOBUF_PROVIDER "clickhouse" CACHE STRING "" FORCE)
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set(_gRPC_PROTOBUF_LIBRARIES ch_contrib::protobuf)
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set(_gRPC_PROTOBUF_PROTOC "protoc")
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set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE $<TARGET_FILE:protoc>)
set(_gRPC_PROTOBUF_PROTOC_LIBRARIES ch_contrib::protoc)
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if(TARGET OpenSSL::SSL)
set(gRPC_USE_UNSECURE_LIBRARIES FALSE)
else()
set(gRPC_USE_UNSECURE_LIBRARIES TRUE)
endif()
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# Use OpenSSL from ClickHouse contrib, not from gRPC third_party.
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set(gRPC_SSL_PROVIDER "clickhouse" CACHE STRING "" FORCE)
set(_gRPC_SSL_INCLUDE_DIR "")
set(_gRPC_SSL_LIBRARIES OpenSSL::Crypto OpenSSL::SSL)
# Use abseil-cpp from ClickHouse contrib, not from gRPC third_party.
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set(gRPC_ABSL_PROVIDER "clickhouse" CACHE STRING "" FORCE)
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# We don't want to build C# extensions.
set(gRPC_BUILD_CSHARP_EXT OFF)
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# TODO: Remove this. We generally like to compile with C++23 but grpc isn't ready yet.
set (CMAKE_CXX_STANDARD 20)
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set(_gRPC_CARES_LIBRARIES ch_contrib::c-ares)
set(gRPC_CARES_PROVIDER "clickhouse" CACHE STRING "" FORCE)
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add_subdirectory("${_gRPC_SOURCE_DIR}" "${_gRPC_BINARY_DIR}")
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# The contrib/grpc/CMakeLists.txt redefined the PROTOBUF_GENERATE_GRPC_CPP() function for its own purposes,
# so we need to redefine it back.
include("${ClickHouse_SOURCE_DIR}/contrib/grpc-cmake/protobuf_generate_grpc.cmake")
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set(gRPC_CPP_PLUGIN $<TARGET_FILE:grpc_cpp_plugin>)
set(gRPC_PYTHON_PLUGIN $<TARGET_FILE:grpc_python_plugin>)
set(gRPC_INCLUDE_DIRS "${ClickHouse_SOURCE_DIR}/contrib/grpc/include")
if(gRPC_USE_UNSECURE_LIBRARIES)
set(gRPC_LIBRARIES grpc_unsecure grpc++_unsecure)
else()
set(gRPC_LIBRARIES grpc grpc++)
endif()
add_library(_ch_contrib_grpc INTERFACE)
target_link_libraries(_ch_contrib_grpc INTERFACE ${gRPC_LIBRARIES})
target_include_directories(_ch_contrib_grpc SYSTEM INTERFACE ${gRPC_INCLUDE_DIRS})
add_library(ch_contrib::grpc ALIAS _ch_contrib_grpc)