Add 'compat_freebsd[4567]' features corresponding to the kernel options

COMPAT_FREEBSD[4567].

MFC after:	1 week
Requested by:	kris

1 files changed, 17 insertions, 0 deletions

diff --git a/sys/kern/kern_mib.c b/sys/kern/kern_mib.c
index 73a1eac4050c..74f05f9534a7 100644
--- a/sys/kern/kern_mib.c
+++ b/sys/kern/kern_mib.c
@@ -38,6 +38,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include "opt_compat.h"
 #include "opt_posix.h"
 #include "opt_config.h"
 
@@ -335,6 +336,22 @@ SYSCTL_STRING(_kern, KERN_HOSTUUID, hostuuid, CTLFLAG_RW, hostuuid,
 
 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
 
+#ifdef COMPAT_FREEBSD4
+FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
+#endif
+
+#ifdef COMPAT_FREEBSD5
+FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
+#endif
+
+#ifdef COMPAT_FREEBSD6
+FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
+#endif
+
+#ifdef COMPAT_FREEBSD7
+FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
+#endif
+
 /*
  * This is really cheating.  These actually live in the libc, something
  * which I'm not quite sure is a good idea anyway, but in order for