Index: head/audio/x42-plugins-lv2/Makefile
===================================================================
--- head/audio/x42-plugins-lv2/Makefile	(revision 472825)
+++ head/audio/x42-plugins-lv2/Makefile	(revision 472826)
@@ -1,58 +1,65 @@
 # Created by: Yuri Victorovich <yuri@rawbw.com>
 # $FreeBSD$
 
 PORTNAME=	x42-plugins
 DISTVERSION=	20180320 # the version is published here: http://gareus.org/misc/x42-plugins.php
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	audio
 MASTER_SITES=	http://gareus.org/misc/x42-plugins/
 PKGNAMESUFFIX=	-lv2
 DISTFILES=	${DISTNAME}${EXTRACT_SUFX} # only to allow USE_GITHUB=nodefault for zita4 compatilility patch
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Collection of LV2 plugins (submodules)
 
 LICENSE=	GPLv2
 
 BUILD_DEPENDS=	lv2>0:audio/lv2 \
 		${LOCALBASE}/include/fftw3.h:math/fftw3 \
 		bash:shells/bash
 LIB_DEPENDS=	libfftw3f.so:math/fftw3-float \
 		libjack.so:audio/jack \
 		liblo.so:audio/liblo \
 		libltc.so:audio/libltc \
 		libsamplerate.so:audio/libsamplerate \
 		libsndfile.so:audio/libsndfile \
 		libzita-convolver.so:audio/zita-convolver
 
 USES=		gmake localbase pkgconfig tar:xz shebangfix
 USE_GITHUB=	nodefault
 GH_TUPLE=	x42:convoLV2:f814f1e:x/convoLV2zita4
 USE_GNOME=	glib20 pango cairo
 USE_XORG=	x11
 USE_GL=		glu gl
 MAKE_ENV=	BUILDOPENGL=yes BUILDGTK=no LV2DIR=${PREFIX}/lib/lv2 MANDIR=${PREFIX}/man/man1
 SHEBANG_FILES=	stepseq.lv2/gridgen.sh
 
 CXXFLAGS+=	-std=c++98
 
 OPTIONS_DEFINE_amd64=	SSE
 OPTIONS_DEFINE_i386=	SSE
 OPTIONS_DEFAULT_amd64=	SSE
 OPTIONS_DEFAULT_i386=	SSE
 
 SSE_MAKE_ARGS=	PORT_SIMD_FLAGS="-msse -msse2 -mfpmath=sse"
+
+# It suffers from the regression in clang-6: https://bugs.llvm.org/show_bug.cgi?id=36915
+LLVM_VER=	50
+BUILD_DEPENDS+=	clang${LLVM_VER}:devel/llvm${LLVM_VER}
+CPP=		clang-cpp${LLVM_VER}
+CC=		clang${LLVM_VER}
+CXX=		clang++${LLVM_VER}
 
 post-patch:
 	@${REINPLACE_CMD} 's| -O3||' \
 		${WRKSRC}/*.lv2/Makefile
 	@${REINPLACE_CMD} 's/__APPLE__/__FreeBSD__/' \
 		${WRKSRC}/tuna.lv2/src/spectr.c \
 		${WRKSRC}/meters.lv2/src/spectr.c
 	@${REINPLACE_CMD} 's|$$(mandir)/man1|$$(MANDIR)|' \
 		${WRKSRC}/sisco.lv2/Makefile
 	@cd ${WRKSRC} && ${RM} -r convoLV2 && ${MV} convoLV2zita4 convoLV2
 	@${REINPLACE_CMD} 's| -msse -msse2 -mfpmath=sse| $$(PORT_SIMD_FLAGS)|' \
 		${WRKSRC}/*.lv2/Makefile ${WRKSRC}/convoLV2/Makefile
 
 .include <bsd.port.mk>