$NetBSD$

--- lib/mkcmd/host.mc.orig	2006-01-25 15:00:46.000000000 +0000
+++ lib/mkcmd/host.mc
@@ -19,7 +19,6 @@ char *pcName, *pcParam;
 	register int iC;
 	auto struct in_addr IATemp;
 	auto int iDec;
-	extern int errno;
 
 	for (pcScan = pcName; '\000' != *pcScan; ++pcScan) {
 		if ('.' != *pcScan && !isdigit(*pcScan)) {
