--- /usr/portage/gnustep-base/libobjc2/libobjc2-1.8.1.ebuild	2017-10-15 17:08:30.000000000 -0700
+++ libobjc2-1.8.1-r1.ebuild	2018-04-03 12:20:17.699374659 -0700
@@ -33,6 +33,7 @@
 src_configure() {
 	export CC=clang
 	export CXX=clang++
+	export CXXFLAGS="-std=c++11 -stdlib=libc++ ${CXXFLAGS}"
 
 	local mycmakeargs=(
 		-DGNUSTEP_CONFIG=GNUSTEP_CONFIG-NOTFOUND