diff -ruN Mk/Uses/bundle.mk Mk/Uses/bundle.mk
--- Mk1/Uses/bundle.mk	1969-12-31 16:00:00.000000000 -0800
+++ Mk2/Uses/bundle.mk	2015-12-28 21:07:39.075782000 -0800
@@ -0,0 +1,35 @@
+# $FreeBSD$
+#
+# Provide support for the bundled projects
+#
+# Feature:	bundle
+# Usage:	USES=bundle
+#
+# MAINTAINER: portmgr@FreeBSD.org
+
+# BUNDLE       - set of bundled submodules in the form directory:group
+#                that will be extracted under WRKSRC.
+#                Extracted submodules should be present in DISTFILES.
+# BUNDLE_ROOT  - The root path for the bundle. Default: WRKSRC
+# BUNDLE_MKDIR - Create bundle directories. Default: no
+
+.if !defined(_INCLUDE_USES_BUNDLE_MK)
+_INCLUDE_USES_BUNDLE_MK=	yes
+
+BUNDLE_ROOT?=${WRKSRC}
+BUNDLE_MKDIR?=no
+
+_USES_extract+= 900:do-bundle
+do-bundle:
+	@${ECHO} "===>  Extracting bundled submodules for ${PKGNAME}"
+.for b in ${BUNDLE:C@.*:@@}
+	@[ ${BUNDLE_MKDIR} != yes ] || ${MKDIR} "${BUNDLE_ROOT}/${BUNDLE:M*\:${b}:C@:.*@@}"
+	@[ -d "${BUNDLE_ROOT}/${BUNDLE:M*\:${b}:C@:.*@@}" ] || (${ECHO} "No directory for the bundle '${b}': >>${BUNDLE_ROOT}/${BUNDLE:M*\:${b}:C@:.*@@}<<" && return 1)
+	@[ -n "${DISTFILES:M*\:${b}:C@:.*@@}" ] || (${ECHO} "No distfile for the bundle '${b}': ${DISTFILES:M*\:${b}:C@:.*@@}" && return 1)
+	@${EXTRACT_CMD} ${EXTRACT_BEFORE_ARGS} ${DISTDIR}/${DISTFILES:M*\:${b}:C@:.*@@} \
+	  -C ${BUNDLE_ROOT}/${BUNDLE:M*\:${b}:C@:.*@@} --strip 1;
+.endfor
+
+EXTRACT_ONLY=${DISTFILES:N*\:*}
+
+.endif