Undo damage done between revisions 1.6 and 1.7

(Guys, please don't DAMAGE commits that have just gone in.)

usr.bin/login/Makefile

@@ -1,18 +1,24 @@
-#	@(#)Makefile	8.1 (Berkeley) 7/19/93
+# From:	@(#)Makefile	8.1 (Berkeley) 7/19/93
+# $Id$
 
-#CFLAGS+=-DKERBEROS
 PROG=	login
 MAN1=	login.1
 MAN5=	login.access.5
 SRCS=	login.c login_access.c login_skey.c login_fbtab.c
-#klogin.c
 DPADD=	${LIBUTIL} ${LIBSKEY}
-#${LIBKRB} ${LIBDES}
 LDADD=	-lutil -lcrypt -lskey
-#-lkrb -ldes
+CFLAGS+=-DLOGIN_ACCESS -DSKEY -DLOGALL
+
+.if exists(${DESTDIR}/usr/lib/libkrb.a) && (defined(MAKE_KERBEROS) \
+	|| defined(MAKE_EBONES))
+CFLAGS+=-DKERBEROS
+SRCS+=	klogin.c
+DPADD+=	${LIBKRB} ${LIBDES}
+LDADD+=	-lkrb -ldes
+.endif
+
 BINOWN=	root
 BINMODE=4555
-CFLAGS+=	-DLOGIN_ACCESS -DSKEY -DLOGALL
 INSTALLFLAGS=-fschg
 
 .include <bsd.prog.mk>