--- /usr/portage/sys-devel/gcc/gcc-6.4.0.ebuild	2017-08-03 21:27:08.000000000 +0100
+++ /usr/portage/sys-devel/gcc/gcc-6.4.0.ebuild	2017-08-19 18:18:26.662927940 +0100
@@ -21,4 +21,6 @@ 
 
 src_prepare() {
 	toolchain_src_prepare
+
+	epatch "${FILESDIR}"/6.3.0/0001-Remove-P-macro-gnat-makefile.patch
 }