Index: head/devel/powerpc64-gcc/Makefile
===================================================================
--- head/devel/powerpc64-gcc/Makefile	(revision 520390)
+++ head/devel/powerpc64-gcc/Makefile	(revision 520391)
@@ -1,102 +1,104 @@
 # $FreeBSD$
 
 PORTNAME=	gcc
 PORTVERSION=	6.4.0
-PORTREVISION=	7
+PORTREVISION=	8
 CATEGORIES=	devel
 MASTER_SITES=	GCC/releases/gcc-${DISTVERSION}
 PKGNAMEPREFIX?=	powerpc64-
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Cross GNU Compiler Collection for ${PKGNAMEPREFIX:C/-//g}
 
 LICENSE=	GPLv3 GPLv3RLE
 LICENSE_COMB=	multi
 
 LIB_DEPENDS=	libgmp.so:math/gmp \
 		libmpfr.so:math/mpfr \
 		libmpc.so:math/mpc
 BUILD_DEPENDS=	${BU_PREFIX}-as:devel/binutils@${PKGNAMEPREFIX:C/-$//:C/-/_/g}
 RUN_DEPENDS=	${BU_PREFIX}-as:devel/binutils@${PKGNAMEPREFIX:C/-$//:C/-/_/g}
+
+CONFLICTS=	${TARGETARCH}-gcc6
 
 USES=	gmake iconv libtool tar:xz makeinfo compiler:c++11-lang
 PLIST_SUB=	TARGETARCH=${PKGNAMEPREFIX:C/-//g} \
 		OPSYS=${OPSYS:tl} \
 		GCC_TARGET=${GCC_TARGET} \
 		GCC_VERSION=${PORTVERSION}
 
 TARGETARCH=	${PKGNAMEPREFIX:C/-//g}
 
 GCC_TARGET=	${PKGNAMEPREFIX:S/amd64/x86_64/}unknown-${OPSYS:tl}${OSREL}
 BU_PREFIX?=	${GCC_TARGET}
 
 GNU_CONFIGURE=	yes
 CONFIGURE_OUTSOURCE=	yes
 CONFIGURE_ARGS+=--target=${GCC_TARGET} --disable-nls --enable-languages=c,c++ \
 		--enable-gnu-indirect-function \
 		--enable-initfini-array \
 		--without-headers \
 		--with-gmp=${LOCALBASE} \
 		--with-pkgversion="FreeBSD Ports Collection for ${PKGNAMEPREFIX:C/-//g}" \
 		--with-system-zlib \
 		--with-gxx-include-dir=/usr/include/c++/v1/ \
 		--with-sysroot="/" \
 		--with-as=${LOCALBASE}/bin/${BU_PREFIX}-as \
 		--with-ld=${LOCALBASE}/bin/${BU_PREFIX}-ld
 
 ALL_TARGET=	all-gcc
 INSTALL_TARGET=	install-gcc
 
 .include <bsd.port.pre.mk>
 
 post-patch:
 	@${REINPLACE_CMD} -e '/LIBSTDCXX/ s/stdc\+\+/c\+\+/g ' \
 		${WRKSRC}//gcc/cp/g++spec.c
 	@${REINPLACE_CMD} -e '/LOCAL_INCLUDE_DIR/ d ' \
 		${WRKSRC}//gcc/Makefile.in
 
 .if ${ARCH} == "amd64"
 CONFIGURE_TARGET=	x86_64-unknown-${OPSYS:tl}${OSREL}
 .else
 CONFIGURE_TARGET=	${ARCH}-unknown-${OPSYS:tl}${OSREL}
 .endif
 
 .if ${TARGETARCH} == "armv6" || ${TARGETARCH} == "aarch64"
 . if ${COMPILER_TYPE} == clang
 MAKE_ARGS+=CXXFLAGS=-fbracket-depth=512
 . endif
 .endif
 
 .if ${ARCH} == "aarch64"
 PLIST_SUB+=	PLUGINS="@comment plugin does not build"
 .else
 PLIST_SUB+=	PLUGINS=""
 .endif
 
 post-install:
 .for f in cpp gcov gcov-dump gcov-tool
 	@if [ -f ${STAGEDIR}${PREFIX}/bin/$f ] ; then \
 		${MV} ${STAGEDIR}${PREFIX}/bin/$f  \
 		    ${STAGEDIR}${PREFIX}/bin/${GCC_TARGET}-$f ; \
 	fi
 .endfor
 .for f in c++ cpp g++ gcc gcc-ar gcc-nm gcc-ranlib gcov gcov-dump gcov-tool
 	@if [ ! -f ${STAGEDIR}${PREFIX}/man/man1/${GCC_TARGET}-$f.1 ] ; then \
 		if [ -f ${STAGEDIR}${PREFIX}/man/man1/$f.1 ] ; then \
 			${CP} ${STAGEDIR}${PREFIX}/man/man1/$f.1  \
 			    ${STAGEDIR}${PREFIX}/man/man1/${GCC_TARGET}-$f.1 ; \
 		fi \
 	fi
 	@${RM} ${STAGEDIR}${PREFIX}/bin/$f
 	@${RM} ${STAGEDIR}${PREFIX}/man/man1/$f.1
 	@${RM} ${STAGEDIR}${PREFIX}/man/man1/$f.1.gz
 .endfor
 	@${RM} ${STAGEDIR}${PREFIX}/share/info/*
 	@${RM} ${STAGEDIR}${PREFIX}/man/man7/*
 	@${RM} -r ${STAGEDIR}${PREFIX}/lib/gcc/${GCC_TARGET}/${PORTVERSION}/include-fixed
 .if ${TARGETARCH} == "amd64" || ${TARGETARCH} == "i386"
 	# Conflicts with sys/x86/include/float.h
 	${RM} ${STAGEDIR}${PREFIX}/lib/gcc/${GCC_TARGET}/${PORTVERSION}/include/float.h
 .endif
 
 .include <bsd.port.post.mk>