sys-auth/ykpers: Fix building with -fno-common

Closes: https://bugs.gentoo.org/706848
Package-Manager: Portage-2.3.99, Repoman-2.3.22
Signed-off-by: David Seifert <soap@gentoo.org>

sys-auth/ykpers/files/ykpers-1.20.0-fix-gcc10-fno-common.patch

@@ -0,0 +1,13 @@
+--- a/ykpers-args.h
++++ b/ykpers-args.h
+@@ -33,8 +33,8 @@
+ 
+ #include "ykpers.h"
+ 
+-const char *usage;
+-const char *optstring;
++extern const char *usage;
++extern const char *optstring;
+ 
+ int args_to_config(int argc, char **argv, YKP_CONFIG *cfg, char *oathid,
+ 		   size_t oathid_len, const char **infname,

sys-auth/ykpers/ykpers-1.20.0.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2019 Gentoo Authors
+# Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -26,6 +26,7 @@ RDEPEND="${DEPEND}
 "
 
 S="${WORKDIR}/yubikey-personalization-${PV}"
+PATCHES=( "${FILESDIR}"/${PN}-1.20.0-fix-gcc10-fno-common.patch )
 
 DOCS=( doc/. AUTHORS NEWS README )