@if [ ! -e "$($(1))" ] ; then echo "Could not download source file: $($(1)) does not exist" ; exit 1 ; fi
@if test "$$$$($(SHA1SUM) $($(1)) | awk '{print $$$$1}')" != "$($(1)-SHA1SUM)" ; then \
echo "sha1sum of the downloaded $($(1)) does not match the one from 'Makefile'" ; \
@if [ ! -e "$($(1))" ] ; then echo "Could not download source file: $($(1)) does not exist" ; exit 1 ; fi
@if test "$$$$($(SHA1SUM) $($(1)) | awk '{print $$$$1}')" != "$($(1)-SHA1SUM)" ; then \
echo "sha1sum of the downloaded $($(1)) does not match the one from 'Makefile'" ; \