Fix build on NetBSD-4.

Signed-off-by: Thomas Klausner <wiz@NetBSD.org>
Reviewed-by: Matthieu Herrb <matthieu.herrb@laas.fr>
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

configure.ac

@@ -108,7 +108,17 @@ AC_SYS_LARGEFILE
 
 AC_CHECK_HEADERS([err.h])
 
+if test "x$netbsd" = xyes; then
+AC_CHECK_HEADERS([machine/sysarch.h])
+AC_CHECK_HEADERS([machine/mtrr.h], [have_mtrr_h="yes"], [have_mtrr_h="no"],
+[#ifdef HAVE_MACHINE_SYSARCH_H
+#include <sys/types.h>
+#include <machine/sysarch.h>
+#endif
+])
+else
 AC_CHECK_HEADER([asm/mtrr.h], [have_mtrr_h="yes"], [have_mtrr_h="no"])
+fi
 
 if test "x$have_mtrr_h" = xyes; then
     AC_DEFINE(HAVE_MTRR, 1, [Use MTRRs on mappings])

src/netbsd_pci.c

@@ -21,10 +21,25 @@
 #include <sys/mman.h>
 #include <sys/types.h>
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #ifdef HAVE_MTRR
 #include <machine/sysarch.h>
 #include <machine/mtrr.h>
+#ifdef _X86_SYSARCH_L
+/* NetBSD 5.x and newer */
 #define netbsd_set_mtrr(mr, num)	_X86_SYSARCH_L(set_mtrr)(mr, num)
+#else
+/* NetBSD 4.x and older */
+#ifdef __i386__
+#define netbsd_set_mtrr(mr, num)	i386_set_mtrr((mr), (num))
+#endif
+#ifdef __amd64__
+#define netbsd_set_mtrr(mr, num)	x86_64_set_mtrr((mr), (num))
+#endif
+#endif
 #endif
 
 #include <dev/pci/pcidevs.h>