games-board/gnuchess: filter LTO (ODR)

Closes: https://bugs.gentoo.org/858611
Signed-off-by: Sam James <[email protected]>

games-board/gnuchess/gnuchess-6.2.9.ebuild

@@ -1,8 +1,10 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
 
+inherit flag-o-matic
+
 DESCRIPTION="Console based chess interface"
 HOMEPAGE="https://www.gnu.org/software/chess/chess.html"
 SRC_URI="mirror://gnu/chess/${P}.tar.gz"
@@ -12,6 +14,9 @@ SLOT="0"
 KEYWORDS="amd64 ~arm arm64 ppc64 ~riscv x86"
 
 src_configure() {
+	# -Wodr warnings, bug #858611
+	filter-lto
+
 	# bug #491088
 	econf --without-readline
 }