Index: databases/foundationdb/Makefile
===================================================================
--- databases/foundationdb/Makefile
+++ databases/foundationdb/Makefile
@@ -3,7 +3,7 @@
 
 PORTNAME=	foundationdb
 DISTVERSION=	6.1.8
-PORTREVISION=	6
+PORTREVISION=	7
 CATEGORIES=	databases
 
 MAINTAINER=	dch@FreeBSD.org
@@ -15,16 +15,24 @@
 ONLY_FOR_ARCHS=	amd64
 ONLY_FOR_ARCHS_REASON=	not yet ported to anything other than amd64
 
-BUILD_DEPENDS=	bash:shells/bash
+_LLVM_VER=	90
+BUILD_DEPENDS=	bash:shells/bash \
+		llvm${_LLVM_VER}>=0:devel/llvm${_LLVM_VER}
 LIB_DEPENDS=	libboost_system.so:devel/boost-libs \
 		libeio.so:devel/libeio
+RUN_DEPENDS=	llvm${_LLVM_VER}>=0:devel/llvm${_LLVM_VER}
 
-USES=		compiler:c++14-lang gmake mono:build python:build shebangfix
+USES=		compiler:c++17-lang gmake mono:build python:build shebangfix
 USE_GITHUB=	yes
 GH_ACCOUNT=	apple
 USE_RC_SUBR=	foundationdb
 SHEBANG_FILES=	build/csprojtom4.py build/link-wrapper.sh build/vcxprojtom4.py \
 		bindings/c/generate_asm.py
+
+CC=		${LOCALBASE}/llvm${_LLVM_VER}/bin/clang
+CXX=		${LOCALBASE}/llvm${_LLVM_VER}/bin/clang++
+CMAKE_ARGS+=	-DLLVM_DIR=${LOCALBASE}/llvm${_LLVM_VER}/lib/cmake/llvm \
+		-DBUILD_WITH_CLANG=${LOCALBASE}/llvm${_LLVM_VER}
 MAKE_ENV+=	PYTHON=${PYTHON_CMD} TLS_DISABLED=yes
 CXXFLAGS+=	-Wno-varargs -DTLS_DISABLED
 CFLAGS+=	-Wno-implicit-int-float-conversion