Index: head/net-mgmt/bandwidthd/Makefile
===================================================================
--- head/net-mgmt/bandwidthd/Makefile	(revision 546683)
+++ head/net-mgmt/bandwidthd/Makefile	(revision 546684)
@@ -1,41 +1,44 @@
 # Created by: Clement Laforet <sheepkiller@cultdeadsheep.org>
 # $FreeBSD$
 
 PORTNAME=	bandwidthd
 PORTVERSION=	2.0.1
 PORTREVISION=	12
 CATEGORIES=	net-mgmt
 MASTER_SITES=	SF/${PORTNAME}/${PORTNAME}/${PORTNAME}%20${PORTVERSION}
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Tracks bandwidth usage by IP address
 
 LICENSE=	GPLv3+ # "any version of the GPL that is current as of your download"
 
 LIB_DEPENDS=	libgd.so:graphics/gd
 
 USES=		gmake tar:tgz
 GNU_CONFIGURE=	YES
 CONFIGURE_ARGS=	ac_cv_lib_iconv_libiconv_open=no \
 		ac_cv_lib_m_pow=no \
 		ac_cv_lib_png_png_read_info=no \
 		ac_cv_lib_pq_PQconnectdb=no
 USE_CSTD=	gnu89
 
+# Fix build with clang11
+CFLAGS+=	-fcommon
+
 SUB_FILES=	bandwidthd
 
 OPTIONS_DEFINE=	DOCS
 
 post-patch:
 	@${REINPLACE_CMD} -e '/requires.*libpng/,/exit/d' \
 		${WRKSRC}/configure
 
 post-install:
 	${INSTALL_SCRIPT} ${WRKDIR}/bandwidthd \
 		${STAGEDIR}${PREFIX}/etc/rc.d
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${WRKSRC}/README ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>