--- /usr/portage/sys-libs/ncurses/ncurses-6.0-r1.ebuild	2016-12-04 23:45:28.000000000 +0800
+++ ./ncurses-6.0-r1.ebuild	2017-01-18 11:50:02.785425262 +0800
@@ -42,6 +42,7 @@
 src_prepare() {
 	[[ -n ${PV_SNAP} ]] && epatch "${WORKDIR}"/${MY_P}-${PV_SNAP}-patch.sh
 	epatch "${PATCHES[@]}"
+	sed -i 's#char (\*f) ();#char (*volatile f) ();#g' "${S}"/configure "${S}"/*/configure
 }
 
 src_configure() {