Index: head/net/appkonference/Makefile
===================================================================
--- head/net/appkonference/Makefile	(revision 380201)
+++ head/net/appkonference/Makefile	(revision 380202)
@@ -1,25 +1,32 @@
 # Created by: Alex Deiter <Alex.Deiter@Gmail.COM>
 # $FreeBSD$
 
 PORTNAME=	appkonference
 PORTVERSION=	2.1
 PORTREVISION=	1
 CATEGORIES=	net
 MASTER_SITES=	SF
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	High-performance Asterisk voice/video conferencing plugin
 
 BUILD_DEPENDS=	asterisk:${PORTSDIR}/net/asterisk
 RUN_DEPENDS=	asterisk:${PORTSDIR}/net/asterisk
 
 USE_CSTD=	gnu89
-USES=		gmake
+USES=		compiler:features gmake
 WRKSRC=		${WRKDIR}/${PORTNAME}/konference
 
 PLIST_FILES=	lib/asterisk/modules/app_konference.so
 
 ONLY_FOR_ARCHS=		amd64 arm i386 ia64
 ONLY_FOR_ARCHS_REASON=	not yet ported to this architecture
 
-.include <bsd.port.mk>
+.include <bsd.port.pre.mk>
+
+.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} < 36
+post-patch:
+	@${REINPLACE_CMD} -e 's|-fsingle-precision-constant||' ${WRKSRC}/Makefile
+.endif
+
+.include <bsd.port.post.mk>