config BR2_PACKAGE_LEVELDB bool "leveldb" depends on BR2_INSTALL_LIBSTDCPP depends on BR2_TOOLCHAIN_HAS_THREADS select BR2_PACKAGE_SNAPPY help LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values. https://github.com/google/leveldb comment "leveldb needs a toolchain w/ C++, threads" depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS