Re: On overriding make variables from the environment...

SZEDER Gábor [off-list ref] writes:

So, then it's either 'config.mak', or passing a 'CC=$CC' argument to
_all_ make commands, including those that are not supposed to build
anything, but only run the tests.  I find the latter aesthetically not
particularly pleasing.

The config.mak file is available for individual builder-testers to
customize their build, and in the context of this discussion, I
think the CI builder is just one particular individual who happens
to be non human.  If it is easy to throw suitable settings from within
the CI configuration .yaml files into config.mak, I'd think that is
exactly how the mechanism was invented to be used, so...