>
> >All I need to know is what version of Musl I am dealing with and I can
> >configure myself.
>
>   Are you willing to maintain an #ifdef forest for all the versions of
> all the libcs and all the kernels your programs may be used with, so
> you can list exhaustively the available features in every configuration?
>

At the risk of jumping in on a question asked of someone else: yes,
absolutely! (Not _all_ available features of course, just the ones
required.)

There are generally not that many nonstandard features you'd want to use in
a typical program, and using an ifdef forest to implement an abstraction
layer around those couple items is just fine.