$NetBSD: patch-aa,v 1.6 2015/09/24 23:50:44 ryoon Exp $

Add backends for NetBSD, Dragonfly, and OpenBSD.

--- configure.ac.orig	2013-07-19 04:24:09.000000000 +0000
+++ configure.ac
@@ -158,6 +158,21 @@ case "$host" in
         *-*-gnu*)
         CK_BACKEND="gnu"
         ;;
+        *-*-netbsd*)
+        CK_BACKEND="netbsd"
+        ;;
+        *-*-dragonfly*)
+        CK_BACKEND="freebsd"
+        KVM_LIBS="-lkvm"
+        ;;
+	*-*-openbsd*)
+	CK_BACKEND="openbsd"
+	AC_CHECK_LIB(kvm, kvm_openfiles, have_kvm=yes,
+		AC_MSG_ERROR([Unable to find libkvm which is needed on OpenBSD]))
+	if test "x$have_kvm" = "xyes"; then
+		KVM_LIBS="-lkvm"
+	fi
+	;;
 	*)
 	AC_MSG_ERROR([No sysdeps back-end implemented for host $host])
 	;;
@@ -167,7 +182,9 @@ AC_SUBST(KVM_LIBS)
 
 AM_CONDITIONAL(CK_COMPILE_LINUX, test x$CK_BACKEND = xlinux, [Compiling for Linux])
 AM_CONDITIONAL(CK_COMPILE_FREEBSD, test x$CK_BACKEND = xfreebsd, [Compiling for FreeBSD])
+AM_CONDITIONAL(CK_COMPILE_NETBSD, test x$CK_BACKEND = xnetbsd, [Compiling for NetBSD])
 AM_CONDITIONAL(CK_COMPILE_SOLARIS, test x$CK_BACKEND = xsolaris, [Compiling for Solaris])
+AM_CONDITIONAL(CK_COMPILE_OPENBSD, test x$CK_BACKEND = xopenbsd, [Compiling for OpenBSD])
 AM_CONDITIONAL(CK_COMPILE_GNU, test x$CK_BACKEND = xgnu, [Compiling for GNU])
 AC_SUBST(CK_BACKEND)