Re: [dev] Special target ".POSIX" in Makefiles

From: Hiltjo Posthuma <>
Date: Fri, 31 Dec 2021 11:16:18 +0100

On Fri, Dec 31, 2021 at 01:52:42AM -0800, Arthur Williams wrote:
> I too fell victim to the GNU trap and thought "?=" was standard and
> actually useful.
> > and want to "dynamically" override it (e.g. in a build system context)
> > when the environment already specifies PREFIX, you either do
> >
> > make -e
> Completely forgot about the -e flag. Now I need to go update all my
> projects and who knows what other GNU-isms I'm unknowingly using.


In my opinion a practical way is to really test it on different systems
(bleeding edge Linux, older Debian stable, NetBSD, OpenBSD) and GNU/Make,
different BSD make programs.

This doesn't cover the POSIX compatibility, but some make implementations are
not fully POSIX either and this also finds other issues.

> > that is exactly what I meant earlier on that the POSIX-intended good
> > practices get destroyed by the retarded GNU extensions.
> Yeah you make a strong argument. I too think a linting tool would be
> useful. I imagine it would function like shellcheck does for shells. If
> nothing else it would really help people identify GNU extensions vs
> portable behavior.

Kind regards / Happy new year,
Received on Fri Dec 31 2021 - 11:16:18 CET

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