defineTest(pkgconfig_exists) {
	packages = $$1
	count(packages, 0): return(false)

	system(pkg-config --exists $$packages) {
		return(true)
	} else {
		return (false)
	}
}

defineReplace(pkgconfig_cflags) {
	packages = $$1
	count(packages, 0): return(false)

	return ($$system(pkg-config --cflags $$packages))
}

defineReplace(pkgconfig_libs) {
	packages = $$1
	count(packages, 0): return(false)

	return ($$system(pkg-config --libs $$packages))
}