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# Copyright 2017 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)
include(ExternalProjectFlags)
if(WIN32 OR LEVELDB_ROOT)
# If the user has supplied a LEVELDB_ROOT then just use it. Add an empty
# custom target so that the superbuild depdendencies don't all have to be
# conditional.
#
# Also, unfortunately, LevelDB does not build on Windows (yet)
# See:
# https://github.com/google/leveldb/issues/363
# https://github.com/google/leveldb/issues/466
add_custom_target(leveldb)
else()
# Clean up warning output to reduce noise in the build
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
set(
LEVELDB_CXX_FLAGS "\
-Wno-deprecated-declarations"
)
endif()
# Map CMake compiler configuration down onto the leveldb Makefile
set(
LEVELDB_OPT "\
$<$<CONFIG:Debug>:${CMAKE_CXX_FLAGS_DEBUG}> \
$<$<CONFIG:Release>:${CMAKE_CXX_FLAGS_RELEASE}>"
)
ExternalProject_GitSource(
LEVELDB_GIT
GIT_REPOSITORY "https://github.com/google/leveldb.git"
GIT_TAG "v1.20"
)
ExternalProject_Add(
leveldb
${LEVELDB_GIT}
PREFIX ${PROJECT_BINARY_DIR}/external/leveldb
# LevelDB's configuration is done in the Makefile
CONFIGURE_COMMAND ""
# The Makefile-based build of leveldb does not support building
# out-of-source.
BUILD_IN_SOURCE ON
# Only build the leveldb library skipping the tools and in-memory
# implementation we don't use.
BUILD_COMMAND
env CXXFLAGS=${LEVELDB_CXX_FLAGS} OPT=${LEVELDB_OPT}
make -j out-static/libleveldb.a
INSTALL_DIR ${FIREBASE_INSTALL_DIR}
UPDATE_COMMAND ""
INSTALL_COMMAND ""
TEST_COMMAND ""
)
endif(WIN32 OR LEVELDB_ROOT)
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