Index: head/release/Makefile.ec2
===================================================================
--- head/release/Makefile.ec2	(revision 336432)
+++ head/release/Makefile.ec2	(revision 336433)
@@ -1,66 +1,66 @@
 #
 # $FreeBSD$
 #
 #
 # Makefile for creating an EC2 AMI from a disk image.
 #
 
 .if ${BRANCH} == "CURRENT" || ${BRANCH} == "STABLE" || ${BRANCH} == "PRERELEASE"
 AMINAMESUFFIX!=	date +-%Y-%m-%d
 .endif
-.if defined(EC2PUBLIC)
+.if defined(EC2PUBLIC) && !empty(EC2PUBLIC)
 PUBLISH=	--public
 .endif
-.if defined(EC2SNSTOPIC)
+.if defined(EC2SNSTOPIC) && !empty(EC2SNSTOPIC)
 EC2SNSREL=	${REVISION}-${BRANCH}
 EC2_SVNBRANCH!=	svn info --show-item relative-url ${WORLDDIR} | sed -e 's/\^\///'
 EC2_SVNREV!=	svn info --show-item last-changed-revision ${WORLDDIR}
 EC2SNSVERS=	${EC2_SVNBRANCH}@${EC2_SVNREV}
 .endif
 
 CLEANFILES+=		ec2ami
 
 .if !exists(/usr/local/bin/bsdec2-image-upload)
 CW_EC2_PORTINSTALL=	cw-ec2-portinstall
 CLEANFILES+=		${CW_EC2_PORTINSTALL}
 .else
 CW_EC2_PORTINSTALL=
 .endif
 
 cw-ec2-portinstall:
 .if exists(${PORTSDIR}/net/bsdec2-image-upload/Makefile)
 	env - PATH=$$PATH make -C ${PORTSDIR}/net/bsdec2-image-upload BATCH=1 all install clean
 .else
 . if !exists(/usr/local/sbin/pkg-static)
 	env ASSUME_ALWAYS_YES=yes pkg bootstrap -y
 . endif
 	env ASSUME_ALWAYS_YES=yes pkg install -y net/bsdec2-image-upload
 .endif
 	@touch ${.TARGET}
 
 ec2ami: cw-ec2 ${CW_EC2_PORTINSTALL}
 .if !defined(AWSKEYFILE) || !exists(${AWSKEYFILE})
 	@echo "--------------------------------------------------------------"
 	@echo ">>> AWSKEYFILE must point at AWS keys for EC2 AMI creation"
 	@echo "--------------------------------------------------------------"
 	@false
 .endif
 .if !defined(AWSREGION)
 	@echo "--------------------------------------------------------------"
 	@echo ">>> AWSREGION must be specified EC2 AMI creation"
 	@echo "--------------------------------------------------------------"
 	@false
 .endif
 .if !defined(AWSBUCKET)
 	@echo "--------------------------------------------------------------"
 	@echo ">>> AWSBUCKET must be specified for EC2 AMI creation"
 	@echo "--------------------------------------------------------------"
 	@false
 .endif
 	/usr/local/bin/bsdec2-image-upload ${PUBLISH} --sriov --ena \
 	    ${.OBJDIR}/ec2.raw \
 	    "${TYPE} ${REVISION}-${BRANCH}-${TARGET}${AMINAMESUFFIX}" \
 	    "${TYPE} ${REVISION}-${BRANCH}-${TARGET}" \
 	    ${AWSREGION} ${AWSBUCKET} ${AWSKEYFILE} \
 	    ${EC2SNSTOPIC} ${EC2SNSREL} ${EC2SNSVERS}
 	@touch ${.TARGET}