endef
# code for creating tarballs from cvs/svn/git/bzr/hg/darcs checkouts - useful for mirror support
-dl_pack/bz2=$(TAR) cfj $(1) $(2)
-dl_pack/gz=$(TAR) cfz $(1) $(2)
+dl_pack/bz2=$(TAR) cjf $(1) $(2)
+dl_pack/gz=$(TAR) czf $(1) $(2)
dl_pack/unknown=echo "ERROR: Unknown pack format for file $(1)"; false
define dl_pack
$(if $(dl_pack/$(call ext,$(1))),$(dl_pack/$(call ext,$(1))),$(dl_pack/unknown))