$OpenBSD: patch-ykpers-args_h,v 1.1 2021/01/31 19:41:30 sthen Exp $

From 09ea16d9e2030e4da6ad00c1e5147e962aa7ff84 Mon Sep 17 00:00:00 2001
From: Klas Lindfors <klas@yubico.com>
Date: Mon, 17 Feb 2020 08:58:33 +0100
Subject: [PATCH] make header declarations extern

Index: ykpers-args.h
--- ykpers-args.h.orig
+++ 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,
