--- Makefile	
+++ Makefile	
@@ -2,8 +2,8 @@ 
 # $FreeBSD: head/lang/mono/Makefile 507372 2019-07-26 20:46:53Z gerald $
 
 PORTNAME=	mono
-PORTVERSION=	5.10.1.57
-PORTREVISION=	2
+PORTVERSION=	6.4.0.198
+PORTREVISION=	0
 CATEGORIES=	lang
 MASTER_SITES=	https://download.mono-project.com/sources/mono/
 DISTFILES=	${PORTNAME}-${PORTVERSION}${EXTRACT_SUFX}
@@ -14,20 +14,20 @@ 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
-ONLY_FOR_ARCHS=		amd64 armv6 armv7 i386 powerpc
+ONLY_FOR_ARCHS=		amd64 armv6 armv7 i386 powerpc powerpc64
 
 BUILD_DEPENDS=	p5-XML-Parser>=0:textproc/p5-XML-Parser \
 		bash:shells/bash \
 		cmake>0:devel/cmake
 LIB_DEPENDS=	libinotify.so:devel/libinotify
-RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pillow>=0:graphics/py-pillow@${PY_FLAVOR} \
-		ca_root_nss>=0:security/ca_root_nss
+RUN_DEPENDS=	ca_root_nss>=0:security/ca_root_nss
 
-CONFLICTS_INSTALL=	czmq-3*
-
-OPTIONS_DEFINE=		MONOLITE NLS X11
+OPTIONS_DEFINE=		MONOLITE NLS X11 HEAPVIZ
 OPTIONS_DEFAULT=	MONOLITE X11
 OPTIONS_SUB=	yes
+
+HEAPVIZ_DESC=	Install mono-heapviz debug tool (requires py-pillow)
+HEAPVIZ_RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pillow>=0:graphics/py-pillow@${PY_FLAVOR}
 
 MONOLITE_DESC=		Use monolite to bootstrap mcs (otherwise use installed mcs)
 MONOLITE_DISTFILES=	monolite-linux-${MONOLITE_VERSION}-latest.tar.gz:monolite
@@ -40,7 +40,7 @@ 
 X11_USES=	display:test
 
 USES=	autoreconf bison compiler:c11 cpe gmake iconv libtool \
-	pathfix perl5 python:2.7 shebangfix tar:bzip2
+	pathfix perl5 python shebangfix tar:xz
 USE_PERL5=	build
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
@@ -49,10 +49,20 @@ 
 
 CONFIGURE_ARGS=	--disable-dtrace --enable-btls
 CONFIGURE_ENV=	ac_cv_header_sys_inotify_h=no
+CONFIGURE_ENV=	CPPFLAGS="-I${LOCALBASE}/include"
 
 MAKE_ENV=	MONO_SHARED_DIR="${WRKDIR}" \
 		INSTALL_STRIP_FLAG="${STRIP}" \
 		TZ=UTC
+
+.include <bsd.port.pre.mk>
+
+.if ${ARCH} == "powerpc" || "powerpc64" 
+CONFIGURE_ARGS=	--disable-dtrace --disable-btls
+# CFLAGS+=	
+CPPFLAGS+=	-O2 -fno-strict-aliasing -Wno-missing-declarations -Wno-maybe-uninitialized -pipe -D_LARGE_FILES -D_ALL_SOURCE -D_THREAD_SAFE -D_REENTRANT
+# LDFLAGS+=	
+.endif
 
 TEST_ARGS=	-k
 TEST_TARGET=	check
--- files/patch-configure.ac	
+++ files/patch-configure.ac	
@@ -1,20 +1,22 @@ 
 --- configure.ac.orig	2018-04-18 10:51:42.000000000 +0300
 +++ configure.ac	2018-06-24 02:38:19.860780000 +0300
-@@ -3271,6 +3271,8 @@
- 			BTLS_PLATFORM=i386
+@@ -301,6 +301,10 @@
+ 			with_gc=sgen
  			;;
- 		  openbsd*|freebsd*|kfreebsd-gnu*)
-+			BTLS_SUPPORTED=yes
-+			BTLS_PLATFORM=i386
- 		        ;;
- 		esac
+ 		powerpc*-*-linux*)
++			# https://bugzilla.novell.com/show_bug.cgi?id=504411
++			disable_munmap=yes
++			;;
++		powerpc*-*-freebsd*)
+ 			# https://bugzilla.novell.com/show_bug.cgi?id=504411
+ 			disable_munmap=yes
+ 			;;
+@@ -4039,7 +4044,7 @@
  		;;
-@@ -3295,6 +3297,8 @@
- 			boehm_supported=false
- 			;;
- 		  openbsd*|freebsd*|kfreebsd-gnu*)
-+                        BTLS_SUPPORTED=yes
-+                        BTLS_PLATFORM=x86_64
- 			;;
- 		  mingw*)
- 			;;
+ 	macppc-*-openbsd* | powerpc*-*-linux* | powerpc-*-openbsd* | \
+         powerpc-*-sysv* | powerpc-*-darwin* | powerpc-*-netbsd* | \
+-        powerpc-*-freebsd* | powerpc*-*-aix* | powerpc*-*-os400* )
++        powerpc*-*-freebsd* | powerpc*-*-aix* | powerpc*-*-os400* )
+ 		if test "x$ac_cv_sizeof_void_p" = "x8"; then
+ 			TARGET=POWERPC64;
+ 			CPPFLAGS="$CPPFLAGS -D__mono_ppc__ -D__mono_ppc64__"