Re: [PATCH v2 0/3] detect-compiler: clang updates

From: Jeff King <peff@peff.net>
Date: Aug 7, 2021, 02:15 UTC
Message-ID: <YQ3suvJfspzRNPL9@coredump.intra.peff.net>
In-Reply-To: <87bl6aypke.fsf@evledraar.gmail.com>

On Sat, Aug 07, 2021 at 04:02:45AM +0200, Ævar Arnfjörð Bjarmason wrote:

> Perhaps I've missed some obvious reason not to do this, but why are we
> parsing the --version output of two modern compilers, as opposed to just
> asking them what type/version they are via their usual macro facilities?
> I.e. something like the below:

That would probably work OK in practice, but it actually seems more complex to me (how do other random compilers react to "-E -"? Is it possible for us to get other output from the preprocessor that would confuse an eval?).

It could perhaps make the Apple version-string confusion go away, though, which might make it worth doing.

-Peff