"cello" example suggests removing %configure macro at all

[jccleaver]

In https://github.com/redhat-developer/rpm-packaging-guide/blob/master/source/packaging-software.adoc it is written:

However, we need to remove the call to %configure because we did not provide a ifdef::rhel[configure script].

This would seem to be bad advice at any point. The %configure macro will place $CFLAGS, etc into the environment to be used by the follow-up 'make' command; not using it may not output a correct build for the distro. A better option (while also tutorializing how to get around certain issues caused by upstream) might be:

%build
# source has no configure script; use macro anyway
echo "#!/bin/sh" > configure ; chmod +x configure

%configure
make %{?_smp_mflags}

For current RPM releases, one could also use this instead of making a dummy file:

%define _configure /bin/true