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find_protobuf.cmake
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# Copyright 2022 PingCAP, Ltd.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Normally we use the internal protobuf library.
# You can set USE_INTERNAL_PROTOBUF_LIBRARY to OFF to force using the external protobuf library, which should be installed in the system in this case.
# The external protobuf library can be installed in the system by running
# sudo apt-get install libprotobuf-dev protobuf-compiler libprotoc-dev
option(USE_INTERNAL_PROTOBUF_LIBRARY "Set to FALSE to use system protobuf instead of bundled. (Experimental. Set to FALSE on your own risk)" ${NOT_UNBUNDLED})
if(NOT EXISTS "${TiFlash_SOURCE_DIR}/contrib/protobuf/cmake/CMakeLists.txt")
if(USE_INTERNAL_PROTOBUF_LIBRARY)
message(WARNING "submodule contrib/protobuf is missing. to fix try run: \n git submodule update --init")
message(WARNING "Can't use internal protobuf")
set(USE_INTERNAL_PROTOBUF_LIBRARY 0)
endif()
set(MISSING_INTERNAL_PROTOBUF_LIBRARY 1)
endif()
if(NOT USE_INTERNAL_PROTOBUF_LIBRARY)
find_package(Protobuf)
if(NOT Protobuf_INCLUDE_DIR OR NOT Protobuf_LIBRARY)
message(WARNING "Can't find system protobuf library")
set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 0)
elseif(NOT Protobuf_PROTOC_EXECUTABLE)
message(WARNING "Can't find system protobuf compiler")
set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 0)
else()
set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 1)
endif()
endif()
if(NOT EXTERNAL_PROTOBUF_LIBRARY_FOUND)
if(NOT MISSING_INTERNAL_PROTOBUF_LIBRARY)
set(Protobuf_INCLUDE_DIR "${TiFlash_SOURCE_DIR}/contrib/protobuf/src")
set(Protobuf_LIBRARY libprotobuf)
set(Protobuf_PROTOC_EXECUTABLE "$<TARGET_FILE:protoc>")
set(Protobuf_PROTOC_LIBRARY libprotoc)
include("${TiFlash_SOURCE_DIR}/contrib/protobuf-cmake/protobuf_generate.cmake")
set(USE_INTERNAL_PROTOBUF_LIBRARY 1)
else()
message(FATAL_ERROR "Can't find protobuf library")
endif()
endif()
if(OS_FREEBSD AND SANITIZE STREQUAL "address")
# ../contrib/protobuf/src/google/protobuf/arena_impl.h:45:10: fatal error: 'sanitizer/asan_interface.h' file not found
# #include <sanitizer/asan_interface.h>
if(LLVM_INCLUDE_DIRS)
set(Protobuf_INCLUDE_DIR "${Protobuf_INCLUDE_DIR}" ${LLVM_INCLUDE_DIRS})
else()
message(WARNING "Can't use protobuf on FreeBSD with address sanitizer without LLVM")
endif()
endif()
message(STATUS "Using protobuf: ${USING_INTERNAL_PROTOBUF_LIBRARY} : ${Protobuf_VERSION} : ${Protobuf_INCLUDE_DIR}, ${Protobuf_LIBRARY}, ${Protobuf_PROTOC_EXECUTABLE}")