get a compiler version?

[Sergey A. Osokin]

On Mon, Oct 04, 2021 at 04:27:19AM +1100, Joshua Root wrote:
> On 2021-10-4 03:20 , Sergey A. Osokin wrote:
> > I've found that www/unit builds, primarily unit-perl* and unit-ruby
> > modules, fail when it runs with clang13.  And that's because of the
> > -Wcompound-token-split-by-macro warning, enable by default for clang13.
> > Here's the similar issue and bug report,
> > https://bugs.ruby-lang.org/issues/17865
> > 
> >  From the other side, all 12 builds are successful with clang12.
> > 
> > Please note, that's not an issue with NGINX Unit itself, that's the
> > issues when clang13 builds unit-perl* and unit-ruby* modules, and
> > there's no issue with unit-python* modules.
> > 
> > So, the forehead solution is probably disable -Werror warning for
> > perl and ruby modules with a reinplace, but I see no reason to do
> > that for all 12 ports, that's why I'm looking for details how to
> > enable -Wno-compound-token-split-by-macro for a specific compiler
> > version.
> 
> Removing use of -Werror (for all ports) is the preferable solution here. 
> That's a good flag for the upstream developers to use so they have to 
> fix warnings, but all it does for our users is cause unnecessary build 
> failures.

Wel, that's definitely good idea for perl and ruby developers to do
that, but in case of NGINX Unit I'd prefer to use more granular
solution, i.e. enable -Wno-compound-token-split-by-macro for clang13.

-- 
Sergey Osokin
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