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# Copyright 2018 Google
#
# 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.
include(ExternalProject)
if(TARGET protobuf)
return()
endif()
# Protubuf has CMake support, but includes it in a `cmake` subdirectory, which
# does not work with CMake's ExternalProject by default. CMake 3.7 added
# SOURCE_SUBDIR as a means of supporting this but that's too new to require
# yet.
# Compose CMAKE_ARGS
set(
cmake_args
-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
-DBUILD_SHARED_LIBS:BOOL=OFF
-Dprotobuf_BUILD_TESTS:BOOL=OFF
-Dprotobuf_WITH_ZLIB:BOOL=OFF
-Dprotobuf_MSVC_STATIC_RUNTIME:BOOL=ON
)
# For single-configuration generators, pass CONFIG at configure time
if(NOT CMAKE_CONFIGURATION_TYPES)
list(APPEND cmake_args -DCMAKE_BUILD_TYPE=$<CONFIG>)
endif()
if(CMAKE_VERSION VERSION_LESS "3.7")
# Manually compose the commands required to invoke CMake in the external
# project.
#
# Compose CONFIGURE_COMMAND so as to preserve the outer CMake's generator
# configuration in the sub-build. Without this the builds can invoke
# different compilers or disagree about word size or other fundamental
# parameters making the output of the sub-build useless. This is based on
# _ep_extract_configure_command in ExternalProject.cmake.
set(configure "${CMAKE_COMMAND}")
if(CMAKE_EXTRA_GENERATOR)
list(APPEND configure "-G${CMAKE_EXTRA_GENERATOR} - ${CMAKE_GENERATOR}")
else()
list(APPEND configure "-G${CMAKE_GENERATOR}")
endif()
if(CMAKE_GENERATOR_PLATFORM)
list(APPEND configure "-A${CMAKE_GENERATOR_PLATFORM}")
endif()
if(CMAKE_GENERATOR_TOOLSET)
list(APPEND configure "-T${CMAKE_GENERATOR_TOOLSET}")
endif()
list(
APPEND configure
${cmake_args}
"${PROJECT_BINARY_DIR}/src/protobuf/cmake"
)
# Compose BUILD_COMMAND and INSTALL_COMMAND
set(build "${CMAKE_COMMAND}" --build .)
# For multi-configuration generators, pass CONFIG at build time.
if(CMAKE_CONFIGURATION_TYPES)
list(APPEND build --config $<CONFIG>)
endif()
set(install ${build} --target install)
set(
commands
CONFIGURE_COMMAND ${configure}
BUILD_COMMAND ${build}
INSTALL_COMMAND ${install}
)
else()
# CMake 3.7 and above support this directly.
set(
commands
CMAKE_ARGS ${cmake_args}
SOURCE_SUBDIR cmake
)
endif()
ExternalProject_Add(
protobuf
DOWNLOAD_DIR ${FIREBASE_DOWNLOAD_DIR}
DOWNLOAD_NAME protobuf-v3.5.1.1.tar.gz
URL https://github.com/google/protobuf/archive/v3.5.1.1.tar.gz
URL_HASH SHA256=56b5d9e1ab2bf4f5736c4cfba9f4981fbc6976246721e7ded5602fbaee6d6869
PREFIX ${PROJECT_BINARY_DIR}
INSTALL_DIR ${FIREBASE_INSTALL_DIR}
${commands}
TEST_COMMAND ""
)
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