--- gcc-6.4.0.ebuild.orig	2017-08-19 18:50:23.712943411 +0100
+++ gcc-6.4.0.ebuild	2017-08-19 18:49:40.872943066 +0100
@@ -21,4 +21,6 @@
 
 src_prepare() {
 	toolchain_src_prepare
+
+	epatch "${FILESDIR}"/6.3.0/0001-Remove-P-macro.patch
 }