$NetBSD: patch-aa,v 1.3 2012/05/12 23:10:30 dholland Exp $

- need unistd.h for some things, so test for it (just in case it's not there, I guess)
- check for statvfs.h for netbsd-3 and up 
- add support for netbsd-6 and up quotas

--- extconf.rb.orig	2002-03-20 18:09:14.000000000 +0000
+++ extconf.rb
@@ -7,6 +7,8 @@
 
 require "mkmf"
 
+have_header("unistd.h")
+
 have_header("linux/quota.h")       # for linux
 have_header("linux/types.h")
 have_header("sys/quota.h")
@@ -14,7 +16,10 @@ have_header("sys/types.h")
 
 have_header("sys/fs/ufs_quota.h")  # for solaris
 
-have_header("ufs/ufs/quota.h")     # for *bsd
+have_header("quota.h")             # for netbsd-6 and up
+
+have_header("ufs/ufs/quota.h")     # for traditional *bsd
 have_header("sys/ucred.h")         # required by FreeBSD and NetBSD
+have_header("sys/statvfs.h")       # required by NetBSD
 
 create_makefile("quota")