kerberos5: Silence compiler warnings

Building the kerberos5 subdirectory currently produces lots of warnings.
Since there are many instances of these warnings and it's contrib code,
this change silences the warnings instead of fixing them.

Reviewed By:	jhb, cy, bjk
Differential Revision: https://reviews.freebsd.org/D28025

kerberos5/Makefile.inc

@@ -9,8 +9,7 @@ KRB5DIR=	${SRCTOP}/crypto/heimdal
 CFLAGS+=	-DHAVE_CONFIG_H -I${.CURDIR:H:H}/include
 
 WARNS?=		1
-CWARNFLAGS.clang+=	-Wno-error=absolute-value
-CWARNFLAGS+=	-Wno-error=deprecated-declarations
+CWARNFLAGS.clang+=	-Wno-absolute-value
 
 .if ${MK_OPENLDAP} != "no" && !defined(COMPAT_32BIT)
 OPENLDAPBASE?=	/usr/local

kerberos5/libexec/kcm/Makefile

@@ -19,6 +19,8 @@ SRCS=	acl.c \
 
 CFLAGS+=-I${KRB5DIR}/lib/krb5 -I${KRB5DIR}/lib/asn1 -I${KRB5DIR}/lib/roken \
 	-I${KRB5DIR}/kcm -I${KRB5DIR}/lib/ipc ${LDAPCFLAGS}
+# Avoid errors for using deprecated krb5_* APIs
+CFLAGS+="-DKRB5_DEPRECATED_FUNCTION(X)="
 LIBADD=	krb5 roken heimntlm heimipcs crypto
 DPADD=	${LDAPDPADD}
 LDADD=	${LIBVERS} ${LDAPLDADD}