Re: Interest for C++20 modules support of boost officially

From: Ruben Perez (rubenperez038_at_[hidden])
Date: 2024-12-22 12:19:15

On Sun, 22 Dec 2024 at 13:10, Peter Dimov via Boost
<boost_at_[hidden]> wrote:
>
> Ruben Perez wrote:
> > 3. Some libraries support configuration macros. For instance,
> > Boost::throw_exception supports BOOST_NO_EXCEPTIONS. This is used by
> > other Boost libraries to support builds that disable exceptions. In the current
> > world, the end user defines BOOST_NO_EXCEPTIONS in their code, includes
> > the library, and everything works. Using a scheme like the one I suggested
> > requires the user to build all the Boost modules using
> > BOOST_NO_EXCEPTIONS, which is more involved than what we have today.
>
> BOOST_NO_EXCEPTIONS is not defined by the user. It's defined by
> Boost.Config when -fno-exceptions or an equivalent is used.

Thanks for the clarification.

I think the same considerations still apply: if the user wants
-fno-exceptions, they would need to build the Boost modules with that
flag if we follow what the CMake guys recommended.

Thanks,
Ruben.