Re: "error: No best alternative for {dir}/libs/mpi/build/boost_mpi", but the build succeeds

From: Дмитрий Архипов (grisumbras_at_[hidden])
Date: 2025-01-17 13:49:24

чт, 16 янв. 2025 г. в 23:59, Nicholas Williams <nicholas_at_[hidden]>:
> This is from just one platform (as stated in my original post, all platforms have the exact same error):
>
> https://gist.github.com/beamerblvd/5bbc952d8ece4a44e38df8630837114a

It turns out, the problem is that you need to configure the mpi module. Put

using mpi ;

into either user-config.jam or project-config.jam (the former is
better, because the bootstrap script rewrites project-config.jam).

Boost.MPI was supposed to tell you that you need to do this, but
something made this part to do nothing:

        message boost_mpi
            : "warning: skipping optional Message Passing Interface
(MPI) library."
            : "note: to enable MPI support, add \"using mpi ;\" to
user-config.jam."
            : "note: to suppress this message, pass \"--without-mpi\" to b2."
            : "note: otherwise, you can safely ignore this message."
            ;