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Message-ID: <CAH8yC8moSUU1ge7+t+59hNB_MoCncmXmffFysZje-GKnKBf8Qw@mail.gmail.com>
Date: Wed, 23 Sep 2020 12:16:36 -0400
From: Jeffrey Walton <noloader@...il.com>
To: musl@...ts.openwall.com
Subject: Re: Re: OS detection wrong on Alpine Linux 3.10
On Wed, Sep 23, 2020 at 12:08 PM Rich Felker <dalias@...c.org> wrote:
>
> On Wed, Sep 23, 2020 at 09:13:16AM -0400, James Y Knight wrote:
> > >
> > > >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.
>
> I can't know whether you're "willing", but you're definitely not
> willing and able. "All the..." includes people's personal projects
> (from scratch or patches to existing ones) that you will never see,
> future systems that come into existence long past your involvement in
> the project or even your lifetime, etc.
Unless something has changed recently, Botan, Crypto++ and OpenSSL are
still being carried by most Linux distributions. OpenSSL is also
regularly distributed as part of other OSes, like AIX, Android, BSDs,
iOS, OS X and Solaris.
And unlike some other projects,[1] Botan, Crypto++ and OpenSSL
actually work in practice on all the platforms without a configuration
program that performs feature tests.
[1] the Rust compiler comes to mind here. It works on Linux x86_64,
but it's hit or miss whether it works or not on other architectures
like ARMv7, Aarch64 and PowerPC, even after an approved configuration
program is run.
Jeff
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