Index: head/audio/libcoverart/Makefile
===================================================================
--- head/audio/libcoverart/Makefile	(revision 488050)
+++ head/audio/libcoverart/Makefile	(revision 488051)
@@ -1,28 +1,33 @@
 # $FreeBSD$
 
 PORTNAME=	libcoverart
 PORTVERSION=	1.0.0
 PORTREVISION=	5
 CATEGORIES=	audio
 MASTER_SITES=	https://github.com/metabrainz/${PORTNAME}/releases/download/release-${PORTVERSION}/
 
 MAINTAINER=	jhale@FreeBSD.org
 COMMENT=	Library for accessing the MusicBrainz cover art archive
 
 LICENSE=	LGPL20
 
 LIB_DEPENDS=	libjansson.so:devel/jansson \
 		libneon.so:www/neon
 
 USES=		compiler:c11 cmake pathfix
 USE_CSTD=	c99
 USE_CXXSTD=	c++98
 USE_LDCONFIG=	yes
 
 CXXFLAGS+=	-Wno-implicit-fallthrough
 
+.if exists(/usr/lib/libstdc++.so)
+CXXFLAGS+=	-Wno-unused-function -Wno-class-memaccess -Wno-catch-value
+CFLAGS+=	-Wno-format-overflow
+.endif
+
 post-patch:
 	${REINPLACE_CMD} -e 's|/usr/local|${LOCALBASE}|g' \
 		 ${WRKSRC}/cmake/modules/*.cmake
 
 .include <bsd.port.mk>