mail/qmail-rblchk: Fix build with llvm16

- Pet portclippy

Sponsored by:	The FreeBSD Foundation

mail/qmail-rblchk/Makefile

@@ -11,17 +11,23 @@ WWW=		http://www.morettoni.net/qmail-rblchk.en.html
 
 USES=		groff qmail:run
 
-LDFLAGS?=	-s
+ALL_TARGET=	default
+INSTALL_TARGET=	setup
+
 CFLAGS?=	-O2 -Wimplicit -Wunused -Wcomment -Wchar-subscripts -Wuninitialized \
 		-Wshadow -Wcast-qual -Wcast-align -Wwrite-strings
+LDFLAGS?=	-s
 
 WRKSRC=		${WRKDIR}/${PORTNAME}
 
-ALL_TARGET=	default
-INSTALL_TARGET=	setup
-
 OPTIONS_DEFINE=	EXAMPLES
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400091
+CFLAGS+=	-Wno-error=incompatible-function-pointer-types
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e '/"cat/d; s|,02755|,0755|' ${WRKSRC}/hier.c