$NetBSD: patch-configure.ac,v 1.1 2017/07/23 16:01:14 adam Exp $

Detect sys/endian.h.

--- configure.ac.orig	2017-07-23 15:42:05.000000000 +0000
+++ configure.ac
@@ -51,6 +51,7 @@ AC_CHECK_HEADERS(float.h)
 AC_CHECK_DECL(strchr, MY_DEFINE(HAVE_STRCHR))
 AC_CHECK_DECL(memcpy, MY_DEFINE(HAVE_MEMCPY))
 AC_CHECK_DECL(strsep, MY_DEFINE(HAVE_STRSEP))
+AC_CHECK_HEADERS(sys/endian.h)
 AC_CHECK_HEADERS(sys/time.h)
 AC_HEADER_TIME
 AC_TYPE_OFF_T