buildroot/package/libconfig/Config.in

config BR2_PACKAGE_LIBCONFIG
	bool "libconfig"
	help
	  Libconfig is a simple library for manipulating structured
	  configuration files. The file format is more compact and more
	  readable than XML. And unlike XML, it is type-aware, so it is
	  not necessary to do string parsing in application code.

	  http://www.hyperrealm.com/libconfig/