buildroot/package/protobuf/Config.in

config BR2_PACKAGE_PROTOBUF
	bool "protobuf"
	depends on BR2_INSTALL_LIBSTDCPP
	help
	  Protocol buffers are Google's language-neutral, platform-neutral,
	  extensible mechanism for serializing structured data.

	  http://code.google.com/p/protobuf/

comment "protobuf requires a toolchain with C++ support enabled"
	depends on !BR2_INSTALL_LIBSTDCPP