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https://github.com/firebase/firebase-ios-sdk
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We check them out from a git tag, so this *should* be a noop. However, cmake seems to want to rebuild these dependencies every time you run make as it assumes the dependency *might* have been updated. (In practice, this isn't completely awful, as make notices the files haven't changed, so files don't actually get recompiled. But the configure step is still re-run and all the files still need to be rescanned.) Skipping the update step speeds up the build considerably. On my linux box, running: cmake .. && make -j && time make -j takes ~8.5s prior to this CL and ~6.5 afterwards. (6s is used by the test suite.) The upcoming protobuf addition would otherwise have made this much worse. (It takes a long time to ./configure.)
79 lines
2.2 KiB
CMake
79 lines
2.2 KiB
CMake
# Copyright 2017 Google
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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include(ExternalProject)
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include(ExternalProjectFlags)
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if(WIN32 OR LEVELDB_ROOT)
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# If the user has supplied a LEVELDB_ROOT then just use it. Add an empty
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# custom target so that the superbuild depdendencies don't all have to be
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# conditional.
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#
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# Also, unfortunately, LevelDB does not build on Windows (yet)
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# See:
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# https://github.com/google/leveldb/issues/363
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# https://github.com/google/leveldb/issues/466
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add_custom_target(leveldb)
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else()
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# Clean up warning output to reduce noise in the build
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang|GNU")
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set(
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LEVELDB_CXX_FLAGS "\
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-Wno-deprecated-declarations"
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)
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endif()
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# Map CMake compiler configuration down onto the leveldb Makefile
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set(
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LEVELDB_OPT "\
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$<$<CONFIG:Debug>:${CMAKE_CXX_FLAGS_DEBUG}> \
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$<$<CONFIG:Release>:${CMAKE_CXX_FLAGS_RELEASE}>"
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)
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ExternalProject_GitSource(
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LEVELDB_GIT
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GIT_REPOSITORY "https://github.com/google/leveldb.git"
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GIT_TAG "v1.20"
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)
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ExternalProject_Add(
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leveldb
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${LEVELDB_GIT}
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PREFIX ${PROJECT_BINARY_DIR}/external/leveldb
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# LevelDB's configuration is done in the Makefile
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CONFIGURE_COMMAND ""
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# The Makefile-based build of leveldb does not support building
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# out-of-source.
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BUILD_IN_SOURCE ON
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# Only build the leveldb library skipping the tools and in-memory
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# implementation we don't use.
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BUILD_COMMAND
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env CXXFLAGS=${LEVELDB_CXX_FLAGS} OPT=${LEVELDB_OPT}
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make -j out-static/libleveldb.a
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INSTALL_DIR ${FIREBASE_INSTALL_DIR}
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UPDATE_COMMAND ""
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INSTALL_COMMAND ""
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TEST_COMMAND ""
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)
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endif(WIN32 OR LEVELDB_ROOT)
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