--- /usr/portage/eclass/gnatbuild.eclass	2017-03-01 06:27:04.000000000 +1000
+++ eclass/gnatbuild.eclass	2017-04-15 22:32:50.487806417 +1000
@@ -21,9 +21,9 @@
 
 FEATURES=${FEATURES/multilib-strict/}
 
-EXPORT_FUNCTIONS="pkg_setup pkg_postinst pkg_postrm src_unpack src_configure src_compile src_install"
+EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_postrm src_unpack src_configure src_compile src_install
 
-IUSE="nls"
+IUSE="nls lto"
 # multilib is supported via profiles now, multilib usevar is deprecated
 
 RDEPEND="app-eselect/eselect-gnat