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function(build_rocksdb)
set(rocksdb_CMAKE_ARGS -DCMAKE_POSITION_INDEPENDENT_CODE=ON)
list(APPEND rocksdb_CMAKE_ARGS -DWITH_GFLAGS=OFF)
if(ALLOCATOR STREQUAL "jemalloc")
list(APPEND rocksdb_CMAKE_ARGS -DWITH_JEMALLOC=ON)
list(APPEND rocksdb_INTERFACE_LINK_LIBRARIES JeMalloc::JeMalloc)
endif()
if (WITH_CCACHE AND CCACHE_FOUND)
list(APPEND rocksdb_CMAKE_ARGS -DCMAKE_CXX_COMPILER=ccache)
list(APPEND rocksdb_CMAKE_ARGS -DCMAKE_CXX_COMPILER_ARG1=${CMAKE_CXX_COMPILER})
else()
list(APPEND rocksdb_CMAKE_ARGS -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER})
endif()
list(APPEND rocksdb_CMAKE_ARGS -DWITH_SNAPPY=${SNAPPY_FOUND})
if(SNAPPY_FOUND)
list(APPEND rocksdb_INTERFACE_LINK_LIBRARIES snappy::snappy)
endif()
# libsnappy is a C++ library, we need to force rocksdb to link against
# libsnappy statically.
if(SNAPPY_FOUND AND WITH_STATIC_LIBSTDCXX)
list(APPEND rocksdb_CMAKE_ARGS -DWITH_SNAPPY_STATIC_LIB=ON)
endif()
list(APPEND rocksdb_CMAKE_ARGS -DWITH_LZ4=${LZ4_FOUND})
if(LZ4_FOUND)
list(APPEND rocksdb_INTERFACE_LINK_LIBRARIES LZ4::LZ4)
endif()
list(APPEND rocksdb_CMAKE_ARGS -DWITH_ZLIB=${ZLIB_FOUND})
if(ZLIB_FOUND)
list(APPEND rocksdb_INTERFACE_LINK_LIBRARIES ZLIB::ZLIB)
endif()
list(APPEND rocksdb_CMAKE_ARGS -DPORTABLE=ON)
list(APPEND rocksdb_CMAKE_ARGS -DCMAKE_AR=${CMAKE_AR})
list(APPEND rocksdb_CMAKE_ARGS -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE})
list(APPEND rocksdb_CMAKE_ARGS -DFAIL_ON_WARNINGS=OFF)
list(APPEND rocksdb_CMAKE_ARGS -DUSE_RTTI=1)
CHECK_C_COMPILER_FLAG("-Wno-stringop-truncation" HAS_WARNING_STRINGOP_TRUNCATION)
if(HAS_WARNING_STRINGOP_TRUNCATION)
list(APPEND rocksdb_CMAKE_ARGS -DCMAKE_C_FLAGS="-Wno-stringop-truncation")
endif()
# we use an external project and copy the sources to bin directory to ensure
# that object files are built outside of the source tree.
include(ExternalProject)
set(rocksdb_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/rocksdb")
set(rocksdb_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/rocksdb")
ExternalProject_Add(rocksdb_ext
SOURCE_DIR "${rocksdb_SOURCE_DIR}"
CMAKE_ARGS ${rocksdb_CMAKE_ARGS}
BINARY_DIR "${rocksdb_BINARY_DIR}"
BUILD_COMMAND $(MAKE) rocksdb
INSTALL_COMMAND "true")
# force rocksdb make to be called on each time
ExternalProject_Add_Step(rocksdb_ext forcebuild
DEPENDEES configure
DEPENDERS build
COMMAND "true"
ALWAYS 1)
add_library(RocksDB::RocksDB STATIC IMPORTED)
add_dependencies(RocksDB::RocksDB rocksdb_ext)
set(rocksdb_INCLUDE_DIR "${rocksdb_SOURCE_DIR}/include")
set(rocksdb_LIBRARY "${rocksdb_BINARY_DIR}/librocksdb.a")
foreach(ver "MAJOR" "MINOR" "PATCH")
file(STRINGS "${rocksdb_INCLUDE_DIR}/rocksdb/version.h" ROCKSDB_VER_${ver}_LINE
REGEX "^#define[ \t]+ROCKSDB_${ver}[ \t]+[0-9]+$")
string(REGEX REPLACE "^#define[ \t]+ROCKSDB_${ver}[ \t]+([0-9]+)$"
"\\1" ROCKSDB_VERSION_${ver} "${ROCKSDB_VER_${ver}_LINE}")
unset(ROCKDB_VER_${ver}_LINE)
endforeach()
set(rocksdb_VERSION_STRING
"${ROCKSDB_VERSION_MAJOR}.${ROCKSDB_VERSION_MINOR}.${ROCKSDB_VERSION_PATCH}")
set_target_properties(RocksDB::RocksDB PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${rocksdb_INCLUDE_DIR}"
INTERFACE_LINK_LIBRARIES "${rocksdb_INTERFACE_LINK_LIBRARIES}"
IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
IMPORTED_LOCATION "${rocksdb_LIBRARY}"
VERSION "${rocksdb_VERSION_STRING}")
endfunction()
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