buildroot/package/pkg-config/Config.in

config BR2_PACKAGE_PKG_CONFIG
	bool "pkg-config"
	select BR2_PACKAGE_LIBGLIB2
	help
	  pkg-config is a system for managing library compile/link
	  flags that works with automake and autoconf. It replaces
	  the ubiquitous *-config scripts you may have seen with a
	  single tool.

	  http://www.freedesktop.org/software/pkgconfig/