Index: head/devel/boost_build/Makefile
===================================================================
--- head/devel/boost_build/Makefile	(revision 561695)
+++ head/devel/boost_build/Makefile	(revision 561696)
@@ -1,36 +1,36 @@
 # Created by: Bruce M. Simpson
 # $FreeBSD$
 
 PORTNAME=	boost_build
 DISTVERSION=	4.3.0.20201229
 CATEGORIES=	devel
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Extensible cross-platform build tool suite
 
 LICENSE=	BSL
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 RUN_DEPENDS=	${LOCALBASE}/bin/bjam:devel/boost-jam
 
-USES=		python:test shebangfix tar:bzip2
+USES=		compiler:c++11-lang python:test shebangfix tar:bzip2
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	boostorg
 GH_PROJECT=	build
 GH_TAGNAME=	29baa79
 
 SHEBANG_GLOB=	*.py
 
 SUB_FILES=	pkg-message
 
 do-build:
-	@cd ${WRKSRC} && ./bootstrap.sh
+	@cd ${WRKSRC} && CXXFLAGS="${CXXFLAGS}" CXX="${CXX}" ./bootstrap.sh
 
 do-install:
-	cd ${WRKSRC} && ./b2 toolset=clang install --prefix=${STAGEDIR}${PREFIX}
+	cd ${WRKSRC} && ./b2 toolset=${CHOSEN_COMPILER_TYPE} install --prefix=${STAGEDIR}${PREFIX}
 
 do-test: # test target fails: https://github.com/boostorg/build/issues/698
-	cd ${WRKSRC} && ./b2 toolset=clang test --prefix=${STAGEDIR}${PREFIX}
+	cd ${WRKSRC} && ./b2 toolset=${CHOSEN_COMPILER_TYPE} test --prefix=${STAGEDIR}${PREFIX}
 
 .include <bsd.port.mk>