--- gcl-2.6.10.ebuild	2018-04-07 23:38:54.000000000 +0200
+++ gcl-2.6.10-r1.ebuild	2019-09-14 14:43:43.034566510 +0200
@@ -1,4 +1,4 @@
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=5
@@ -59,6 +59,7 @@
 	epatch "${FILESDIR}"/${PN}-tcl-8.6.patch
 	epatch "${FILESDIR}"/${PN}-gmp-6.patch
 	epatch "${FILESDIR}"/${PN}-readline-6.3.patch
+	epatch "${FILESDIR}"/${P}-sigaltstack.patch
 
 	sed -e 's|"-fomit-frame-pointer"|""|' -i configure
 	sed -e 's|@EXT@||g' debian/in.gcl.1 > gcl.1
@@ -67,6 +68,7 @@
 src_configure() {
 	strip-flags
 	filter-flags -fstack-protector -fstack-protector-all
+	append-cflags $(test-flags-CC -fgnu89-inline)
 
 	local tcl=""
 	if use tk; then