Index: Mk/bsd.port.mk
===================================================================
--- Mk/bsd.port.mk	(revision 402683)
+++ Mk/bsd.port.mk	(working copy)
@@ -1970,6 +1970,10 @@
 CHECKSUM_ALGORITHMS?= sha256
 
 DISTINFO_FILE?=		${MASTERDIR}/distinfo
+TIMESTAMP=	1449231300
+.if exists(${DISTINFO_FILE})
+TIMESTAMP!=	${AWK} -F= -v ts=${TIMESTAMP} '/^timestamp/ { ts=$$2 } END { print ts}' ${DISTINFO_FILE}
+.endif 
 
 MAKE_FLAGS?=	-f
 MAKEFILE?=		Makefile
@@ -1981,7 +1985,9 @@
 			CPP="${CPP}" CPPFLAGS="${CPPFLAGS}" \
 			LDFLAGS="${LDFLAGS}" LIBS="${LIBS}" \
 			CXX="${CXX}" CXXFLAGS="${CXXFLAGS}" \
-			MANPREFIX="${MANPREFIX}"
+			MANPREFIX="${MANPREFIX}" \
+			SOURCE_DATE_EPOCH=${TIMESTAMP}
+PKG_ENV+=	SOURCE_DATE_EPOCH=${TIMESTAMP}
 
 # Add -fno-strict-aliasing to CFLAGS with optimization level -O2 or higher.
 # gcc 4.x enable strict aliasing optimization with -O2 which is known to break
@@ -2608,8 +2614,8 @@
 GNU_CONFIGURE_MANPREFIX?=	${MANPREFIX}
 CONFIG_SITE?=		${PORTSDIR}/Templates/config.site
 CONFIGURE_ARGS+=	--prefix=${GNU_CONFIGURE_PREFIX} $${_LATE_CONFIGURE_ARGS}
-.if defined(X_BUILD_FOR)
-CONFIGURE_ARGS+=	--host=${X_BUILD_FOR}
+.if defined(X_BUILD_FOR) || defined(CROSS_BUILD)
+CONFIGURE_ARGS+=	--host=${CROSS_BUILD:UX_BUILD_FOR}
 .endif
 CONFIGURE_ENV+=		CONFIG_SITE=${CONFIG_SITE} lt_cv_sys_max_cmd_len=${CONFIGURE_MAX_CMD_LEN}
 HAS_CONFIGURE=		yes
@@ -4195,7 +4201,11 @@
 makesum: check-checksum-algorithms
 	@cd ${.CURDIR} && ${MAKE} fetch NO_CHECKSUM=yes \
 		DISABLE_SIZE=yes
-	@if [ -f ${DISTINFO_FILE} ]; then ${CAT} /dev/null > ${DISTINFO_FILE}; fi
+	@if [ -f ${DISTINFO_FILE} ]; then \
+			if ${GREP} -q "^timestamp" ${DISTINFO_FILE}; then \
+				${GREP} -v "^timestamp" ${DISTINFO_FILE} > ${DISTINFO_FILE}.sav; \
+			fi ; \
+	fi
 	@( \
 		cd ${DISTDIR}; \
 		\
@@ -4206,11 +4216,19 @@
 				eval alg_executable=\$$$$alg; \
 				\
 				if [ $$alg_executable != "NO" ]; then \
-					$$alg_executable $$file >> ${DISTINFO_FILE}; \
+					$$alg_executable $$file >> ${DISTINFO_FILE}.new; \
 				fi; \
 			done; \
-			${ECHO_CMD} "SIZE ($$file) = `${STAT} -f \"%z\" $$file`" >> ${DISTINFO_FILE}; \
-		done \
+			${ECHO_CMD} "SIZE ($$file) = `${STAT} -f \"%z\" $$file`" >> ${DISTINFO_FILE}.new; \
+		done ; \
+		if [ ! -f ${DISTINFO_FILE}.sav ] || ! cmp -s ${DISTINFO_FILE}.sav ${DISTINFO_FILE}.new ; then \
+			${ECHO_CMD} "timestamp=`date '+%s'`" > ${DISTINFO_FILE} ; \
+			${CAT} ${DISTINFO_FILE}.new >> ${DISTINFO_FILE} ; \
+		fi ; \
+		rm ${DISTINFO_FILE}.new ; \
+		if [ -f ${DISTINFO_FILE}.sav ]; then \
+			${RM} ${DISTINFO_FILE}.sav ; \
+		fi;  \
 	)
 .endif