Some minor issues on Linux (was: Gsoc 18 Project | Collect build statistics)

[Joshua Root]

On 2018-4-26 02:19 , Mojca Miklavec wrote:
> On 25 April 2018 at 17:54, Joshua Root wrote:
>> Our build system only knows how to create users on macOS. You'll have to
>> create the macports user manually.
> 
> Should we at least place a more helpful message somewhere?
> Perhaps at the end of "make install", but something short next to this
> warning could be useful as well.

Current warning is at
<https://github.com/macports/macports-base/blob/master/Makefile.in#L91>