audio/mpdcon: Fix build with llvm16

- Adopt port

Sponsored by:	The FreeBSD Foundation

audio/mpdcon/Makefile

@@ -5,7 +5,7 @@ CATEGORIES=	audio gnustep
 MASTER_SITES=	SAVANNAH/gap
 DISTNAME=	MPDCon-${PORTVERSION}
 
-MAINTAINER=	ports@FreeBSD.org
+MAINTAINER=	bofh@FreeBSD.org
 COMMENT=	MPD client for GNUstep
 WWW=		https://gap.nongnu.org/mpdcon/
 
@@ -18,6 +18,12 @@ LIB_DEPENDS=	libmpdclient.so.2:audio/libmpdclient \
 USES=		gnustep
 USE_GNUSTEP=	base gui back build
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1400091
+CFLAGS+=	-Wno-error=incompatible-function-pointer-types
+.endif
+
 post-patch:
 	${REINPLACE_CMD} -e \
 		's|^GNUSTEP_INSTALLATION_DIR|#GNUSTEP_INSTALLATION_DIR|' \