diff --git a/lang/mono/Makefile b/lang/mono/Makefile
index 541b96c9dd10..4414273daadb 100644
--- a/lang/mono/Makefile
+++ b/lang/mono/Makefile
@@ -1,102 +1,102 @@
 # Created by: Yukihiro Nakai <nakai@FreeBSD.org>
 
 PORTNAME=	mono
 PORTVERSION=	5.10.1.57
 PORTREVISION=	3
 CATEGORIES=	lang
 MASTER_SITES=	https://download.mono-project.com/sources/mono/
 DISTFILES=	${PORTNAME}-${PORTVERSION}${EXTRACT_SUFX}
 
 MAINTAINER=	mono@FreeBSD.org
 COMMENT=	Open source implementation of .NET Development Framework
 
 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=	${PY_PILLOW} \
 		ca_root_nss>=0:security/ca_root_nss
 
 CONFLICTS_INSTALL=	czmq-3*
 
 OPTIONS_DEFINE=		MONOLITE NLS X11
 OPTIONS_DEFAULT=	MONOLITE X11
 OPTIONS_SUB=	yes
 
 MONOLITE_DESC=		Use monolite to bootstrap mcs (otherwise use installed mcs)
 MONOLITE_DISTFILES=	monolite-linux-${MONOLITE_VERSION}-latest.tar.gz:monolite
 MONOLITE_MASTER_SITES=	http://download.mono-project.com/monolite/:monolite
 MONOLITE_VERSION=	1051000004
 
 NLS_CONFIGURE_OFF=	--disable-nls
 NLS_USES=	gettext
 
 X11_USES=	display:test
 
 USES=	autoreconf bison compiler:c11 cpe gmake iconv libtool \
 	pathfix perl5 python:3.6+ shebangfix tar:bzip2
 USE_PERL5=	build
 GNU_CONFIGURE=	yes
 USE_LDCONFIG=	yes
 SHEBANG_FILES=	scripts/mono-heapviz mono/mini/genmdesc.py mono/tests/test_lldb.py
 BINARY_ALIAS=	python=${PYTHON_CMD}
 
 CONFIGURE_ARGS=	--disable-dtrace
 CONFIGURE_ENV=	ac_cv_header_sys_inotify_h=no
 
 MAKE_ENV=	MONO_SHARED_DIR="${WRKDIR}" \
 		INSTALL_STRIP_FLAG="${STRIP}" \
 		TZ=UTC
 
 TEST_ARGS=	-k
 TEST_TARGET=	check
 
 PORTSCOUT=	limit:^\d+\.\d+\.[1-9]\d*
 
 LOCALBASE?=	/usr/local
 .if !exists(${LOCALBASE}/bin/mcs)
 OPTIONS_SLAVE=	MONOLITE
 .endif
 
 .include <bsd.port.options.mk>
 
-.if ${ARCH} == powerpc
+.if ${ARCH:Mpowerpc*}
 PLIST+=	${.CURDIR}/pkg-plist.powerpc
 .else
 CONFIGURE_ARGS+=	--enable-btls
 .endif
 
 post-extract-MONOLITE-on:
 	${MKDIR} ${WRKSRC}/mcs/class/lib/monolite-linux
 	${MV} ${WRKDIR}/monolite-linux-${MONOLITE_VERSION}-latest ${WRKSRC}/mcs/class/lib/monolite-linux/${MONOLITE_VERSION}
 
 post-patch:
 	${REINPLACE_CMD} -e 's|^#!/bin/bash|#!/usr/bin/env bash|g' \
 		${WRKSRC}/scripts/mono-find-provides.in \
 		${WRKSRC}/scripts/mono-find-requires.in \
 		${WRKSRC}/scripts/mono-test-install
 	${FIND} ${WRKSRC} -name '*.sh' | ${XARGS} ${REINPLACE_CMD} \
 		-e 's|^#!/bin/bash|#!/bin/sh|g'
 	${SED} 's/tarball/${PORTVERSION}/' ${WRKSRC}/mono/mini/Makefile.am.in \
 		> ${WRKSRC}/mono/mini/Makefile.am
 	${REINPLACE_CMD} -e 's|/usr/share|${PREFIX}|g' \
 		${WRKSRC}/mcs/class/corlib/System/Environment.cs \
 		${WRKSRC}/external/corefx/src/System.Runtime.Extensions/src/System/Environment.Unix.cs
 	${REINPLACE_CMD} -e 's|/usr/share/.mono|${PREFIX}/share/mono|g' \
 		${WRKSRC}/man/mono-configuration-crypto.1 \
 		${WRKSRC}/man/mono.1 \
 		${WRKSRC}/man/mozroots.1
 
 post-configure:
 	${REINPLACE_CMD} -e 's|share\/man|man|g' \
 		${WRKSRC}/mcs/jay/Makefile
 
 post-install:
 	${MKDIR} ${STAGEDIR}${PREFIX}/mono
 
 .include <bsd.port.mk>
diff --git a/lang/mono/files/patch-configure.ac b/lang/mono/files/patch-configure.ac
index 280b4da2ddb1..acd3051f7d70 100644
--- a/lang/mono/files/patch-configure.ac
+++ b/lang/mono/files/patch-configure.ac
@@ -1,20 +1,33 @@
---- 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 @@
+--- configure.ac.orig	2018-08-24 15:19:14 UTC
++++ configure.ac
+@@ -3298,6 +3298,8 @@ case "$host" in
  			BTLS_PLATFORM=i386
  			;;
  		  openbsd*|freebsd*|kfreebsd-gnu*)
 +			BTLS_SUPPORTED=yes
 +			BTLS_PLATFORM=i386
  		        ;;
  		esac
  		;;
-@@ -3295,6 +3297,8 @@
+@@ -3322,6 +3324,8 @@ case "$host" in
  			boehm_supported=false
  			;;
  		  openbsd*|freebsd*|kfreebsd-gnu*)
 +                        BTLS_SUPPORTED=yes
 +                        BTLS_PLATFORM=x86_64
  			;;
  		  mingw*)
  			;;
+@@ -3355,11 +3359,10 @@ case "$host" in
+ 		INTL="intl"
+ 		;;
+ 	macppc-*-openbsd* | powerpc*-*-linux* | powerpc-*-openbsd* | \
+-        powerpc-*-sysv* | powerpc-*-darwin* | powerpc-*-netbsd* | powerpc-*-freebsd* )
++        powerpc-*-sysv* | powerpc-*-darwin* | powerpc-*-netbsd* | powerpc*-*-freebsd* )
+ 		if test "x$ac_cv_sizeof_void_p" = "x8"; then
+ 			TARGET=POWERPC64;
+ 			CPPFLAGS="$CPPFLAGS -D__mono_ppc__ -D__mono_ppc64__"
+-			CFLAGS="$CFLAGS -mminimal-toc"
+ 		else
+ 			TARGET=POWERPC;
+ 			CPPFLAGS="$CPPFLAGS -D__mono_ppc__"
diff --git a/lang/mono/files/patch-mono_mini_mini-ppc.c b/lang/mono/files/patch-mono_mini_mini-ppc.c
new file mode 100644
index 000000000000..bf021a40a395
--- /dev/null
+++ b/lang/mono/files/patch-mono_mini_mini-ppc.c
@@ -0,0 +1,20 @@
+--- mono/mini/mini-ppc.c.orig	2018-08-24 15:17:13 UTC
++++ mono/mini/mini-ppc.c
+@@ -4650,7 +4650,7 @@ mono_arch_register_lowlevel_calls (void)
+ }
+ 
+ #ifdef __mono_ppc64__
+-#ifdef _LITTLE_ENDIAN
++#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+ #define patch_load_sequence(ip,val) do {\
+ 		guint16 *__load = (guint16*)(ip);	\
+ 		g_assert (sizeof (val) == sizeof (gsize)); \
+@@ -4659,7 +4659,7 @@ mono_arch_register_lowlevel_calls (void)
+ 		__load [6] = (((guint64)(gsize)(val)) >> 16) & 0xffff;	\
+ 		__load [8] =  ((guint64)(gsize)(val))        & 0xffff;	\
+ 	} while (0)
+-#elif defined _BIG_ENDIAN
++#elif G_BYTE_ORDER == G_BIG_ENDIAN
+ #define patch_load_sequence(ip,val) do {\
+ 		guint16 *__load = (guint16*)(ip);	\
+ 		g_assert (sizeof (val) == sizeof (gsize)); \