Index: head/net-p2p/libtorrent-rasterbar/Makefile
===================================================================
--- head/net-p2p/libtorrent-rasterbar/Makefile	(revision 529946)
+++ head/net-p2p/libtorrent-rasterbar/Makefile	(revision 529947)
@@ -1,74 +1,82 @@
 # Created by: Doug Barton <dougb@FreeBSD.org>
 # $FreeBSD$
 
 PORTNAME=	libtorrent-rasterbar
 DISTVERSIONPREFIX=	libtorrent-
 DISTVERSION=	1_2_5
+PORTREVISION=	1
 CATEGORIES=	net-p2p
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	C++ library implementing a BitTorrent client
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
 LIB_DEPENDS=	libboost_chrono.so:devel/boost-libs \
 		libboost_random.so:devel/boost-libs \
 		libboost_system.so:devel/boost-libs
 
-USES=		cmake compiler:c++14-lang iconv:wchar_t libtool pathfix pkgconfig python:2.7,test shebangfix ssl
+USES=		cmake iconv:wchar_t libtool pathfix pkgconfig python:2.7,test shebangfix ssl # compiler:c++14-lang
 LDFLAGS+=	-L${LOCALBASE}/lib ${ICONV_LIB}
 SHEBANG_FILES=	test/socks.py test/web_server.py
 USE_GITHUB=	yes
 GH_ACCOUNT=	arvidn
 GH_PROJECT=	libtorrent
 USE_LDCONFIG=	yes
 
 SHLIB_VER=	10
 PLIST_SUB+=	SHLIB_VER="${SHLIB_VER}"
 
 DOCFILES=	AUTHORS ChangeLog
 PORTDOCS=	${DOCFILES} docs/*
 PORTEXAMPLES=	*.cpp
 
 OPTIONS_DEFINE=		DOCS EXAMPLES LOGGING
 OPTIONS_DEFAULT=	LOGGING
 OPTIONS_SUB=		yes
 LOGGING_DESC=		Enable logging to disk
 
 EXAMPLES_CMAKE_BOOL=	build_examples
 LOGGING_CMAKE_BOOL=	logging
+
+# workaroud for the clang-10 compiler failure: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244830
+LLVM_VER=	90
+BUILD_DEPENDS+=	clang${LLVM_VER}:devel/llvm${LLVM_VER}
+CPP=		clang-cpp${LLVM_VER}
+CC=		clang${LLVM_VER}
+CXX=		clang++${LLVM_VER}
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|/usr/local/include|${PREFIX}/include|' \
 		${WRKSRC}/Jamfile
 	@${REINPLACE_CMD} -e 's|python|${PYTHON_CMD}|' \
 		${WRKSRC}/test/setup_transfer.cpp
 
 post-install:
 	@${RM} ${STAGEDIR}${PREFIX}/include/libtorrent/Makefile*
 	# Workaround for -DTHREADS_HAVE_PTHREAD_ARG:BOOL=YES being set in
 	# Mk/Uses/cmake.mk
 	# References:   https://mariadb.atlassian.net/browse/MDEV-9388
 	#               https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206169
 	@${REINPLACE_CMD} 's/-l-pthread/-lpthread/' \
 		${STAGEDIR}${PREFIX}/libdata/pkgconfig/libtorrent-rasterbar.pc
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${DOCFILES:S|^|${WRKSRC}/|} ${STAGEDIR}${DOCSDIR}
 	cd ${WRKSRC} && ${COPYTREE_SHARE} docs ${STAGEDIR}${DOCSDIR}
 	${RM} ${STAGEDIR}${DOCSDIR}/docs/._*
 
 post-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	${INSTALL_DATA} ${WRKSRC}/examples/${PORTEXAMPLES} \
 		${STAGEDIR}${EXAMPLESDIR}
 
 do-test:
 	@cd ${BUILD_WRKSRC} && \
 		${SETENV} ${CONFIGURE_ENV} ${CMAKE_BIN} ${CMAKE_ARGS} -Dbuild_tests:BOOL=ON ${CMAKE_SOURCE_PATH} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} ${ALL_TARGET} && \
 		${SETENV} ${MAKE_ENV} ${MAKE_CMD} ${MAKE_ARGS} test
 
 .include <bsd.port.mk>