Index: head/shells/ksh93/Makefile
===================================================================
--- head/shells/ksh93/Makefile	(revision 556451)
+++ head/shells/ksh93/Makefile	(revision 556452)
@@ -1,83 +1,84 @@
 # $FreeBSD$
 
 # Make sure that your configuration DOES NOT set ANY gcc-related
 # variables.  ksh93 will not compile if you set even the seemingly
 # most unrelated variable related to gcc configuration.  This means
 # especially any flag which attempts to set the cputype.  Setting the
 # cputype does absolutely nothing except cause systems to fail in
 # horrible ways.  For any modern processor, setting the cputype only
 # serves to expose gcc bugs and does nothing to speed up any known
 # program.  If you are really unconvinced, go ahead but do not
 # complain to me about it.
 
 # Do not update this port to 93v. 93v was an abandoned beta when
 # David Korn left the project. It was subsequently reverted to 93u.
 # https://github.com/att/ast/issues/1466#issuecomment-589942449
 
 PORTNAME=	ksh93
 DISTVERSION=	93u
 PORTREVISION=	1
 PORTEPOCH=	2
 CATEGORIES=	shells
 DIST_SUBDIR=	ksh93
 
 MAINTAINER=	cy@FreeBSD.org
 COMMENT=	AT&T KornShell 93
 
 LICENSE=	EPL
 
 BROKEN_aarch64=	Fails to compile: needs sbrk
+BROKEN_riscv64=	Fails to compile: needs sbrk
 
 USES=		compiler:c11
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	att
 GH_PROJECT=	ast
 
 KSH_CONFLICTS=		pdksh-*
 KSH93_CONFLICTS=	ksh93-devel-* ast-ksh-*
 
 OPTIONS_DEFAULT=	KSH93 EXAMPLES
 OPTIONS_DEFINE=		EXAMPLES STATIC
 OPTIONS_SINGLE=		BIN_KSH
 OPTIONS_SINGLE_BIN_KSH=	KSH KSH93
 KSH_DESC=		Install to ${PREFIX}/bin/ksh
 KSH93_DESC=		Install to ${PREFIX}/bin/ksh93
 
 CFLAGS+=	-DMAP_TYPE
 LDFLAGS+=	-lm
 MAKE_ENV=	CCFLAGS="-Wno-unused-value -Wno-parentheses -Wno-logical-op-parentheses" CFLAGS="${CFLAGS}"
 
 STATIC_MAKE_ENV=     LDFLAGS+=-static
 
 KSH_PLIST_SUB=		93=""
 KSH93_PLIST_SUB=	93="93"
 
 .include <bsd.port.pre.mk>
 
 .if ${CHOSEN_COMPILER_TYPE} == gcc && ${COMPILER_VERSION} >= 90
 BROKEN=	GCC 9.1 changes the output of `gcc -E` which breaks the conf.sh script, fixed in shells/ksh93-devel
 .endif
 
 .if ${PORT_OPTIONS:MKSH93}
 PNAME=		ksh93
 .else
 PNAME=		ksh
 .endif
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|SF_FLAGS|SFIO_FLAGS|g' ${WRKSRC}/src/lib/libast/include/sfio*.h ${WRKSRC}/src/lib/libast/sfio/*.c
 
 do-build:
 	@cd ${WRKSRC}/ && ${SETENV} -i ${MAKE_ENV} ${SH} bin/package flat make ksh93
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/bin/ksh ${STAGEDIR}${PREFIX}/bin/${PNAME}
 	${INSTALL_MAN} ${WRKSRC}/man/man1/sh.1 ${STAGEDIR}${MAN1PREFIX}/man/man1/${PNAME}.1
 	${MKDIR} ${STAGEDIR}${EXAMPLESDIR}/
 	cd ${WRKSRC}/fun/ && ${INSTALL_SCRIPT} dirs popd pushd ${STAGEDIR}${EXAMPLESDIR}/
 
 do-test:
 	cd ${WRKSRC}/src/cmd/ksh93/tests/ && ${SETENV} SHELL=${WRKSRC}/bin/ksh ${WRKSRC}/bin/ksh shtests
 
 .include <bsd.port.post.mk>