config BR2_PACKAGE_MSGPACK bool "msgpack" depends on BR2_INSTALL_LIBSTDCPP depends on BR2_TOOLCHAIN_HAS_SYNC_4 help MessagePack is an efficient binary serialization format. It lets you exchange data among multiple languages like JSON but it's faster and smaller. http://msgpack.org/ comment "msgpack needs a toolchain w/ C++" depends on !BR2_INSTALL_LIBSTDCPP depends on BR2_TOOLCHAIN_HAS_SYNC_4