$OpenBSD: patch-screen_h,v 1.1 2021/02/06 09:31:46 kirby Exp $
Fix for -fno-common from Gentoo
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=8edf247202490c028bce701f26b52e39f996c287

Index: screen.h
--- screen.h.orig
+++ screen.h
@@ -20,7 +20,7 @@ extern unsigned char start_font1[2048];
 extern unsigned char start_font2[4096];
 extern unsigned char start_font3[4096];
 
-int monthgraph_style;
+extern int monthgraph_style;
 
 /* This is on in screen_full_refresh, used in *_refresh() */
 extern char screen_refreshing;
