$NetBSD: patch-aj,v 1.3 2007/07/20 00:09:23 gdt Exp $

--- libguile/_scm.h.orig	2007-05-09 16:22:03.000000000 -0400
+++ libguile/_scm.h
@@ -119,7 +119,9 @@
 # define SCM_SYSCALL(line) line;
 #endif /* ndef SCM_SYSCALL */
 
-#if !defined (MSDOS) && !defined (__MINGW32__)
+#include <errno.h>
+
+#if !defined (MSDOS) && !defined (__MINGW32__) && !defined(errno)
 # ifdef ARM_ULIB
     extern volatile int errno;
 # else
