Accidentally closed identical PR and couldn't reopen it.
Apparently relying on dpkg-buildpackage to run support/Makefile early
enough is not reliable. I haven't dug into why but rather added
init:ing the checkdata submodule to the root Makefile's targets. Worst case, adding it for the all target is redundant given the support/Makefile
Tested as far as running make builddeb in clean clone from inside a ubuntu:18.04 docker image (running on my macbook).
Fixes: #79
Accidentally closed identical PR and couldn't reopen it.
Apparently relying on dpkg-buildpackage to run support/Makefile early enough is not reliable. I haven't dug into why but rather added init:ing the checkdata submodule to the root Makefile's targets. Worst case, adding it for the all target is redundant given the support/Makefile
Tested as far as running make builddeb in clean clone from inside a ubuntu:18.04 docker image (running on my macbook).