use git submodule foreach and pull

diff --git a/Makefile b/Makefile
index b694046d8528c942fe5fcd021d1787a783bad819..4a48d2e0e441a316361ee2341484aa3697408459 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -30,8 +30,7 @@ submodule:
 # upgrade to current master
 .PHONY: download
 download ${SRCDIR}: submodule
-       cd ${SRCDIR}; git fetch
-       cd ${SRCDIR}; git merge --ff-only master
+       git submodule foreach 'git pull --ff-only origin master'
 
 .PHONY: upload
 upload: ${DEB}