From: ludo@gnu.org (Ludovic Courtès)
To: David Craven <david@craven.ch>
Cc: guix-devel <guix-devel@gnu.org>
Subject: Re: Guix build side - including modules (guix hash), (guix gcrypt): How to provide shared library?
Date: Mon, 02 Jan 2017 23:03:34 +0100 [thread overview]
Message-ID: <87y3yt86h5.fsf@gnu.org> (raw)
In-Reply-To: <CAL1_imk+krS6heOTjHU5j4spjTPyQZE7zq0VRwvTQLgaH4OFfQ@mail.gmail.com> (David Craven's message of "Mon, 2 Jan 2017 15:31:31 +0100")
David Craven <david@craven.ch> skribis:
>> Also, why is sha256 used via FFI via an external library? It's not exactly difficult to implement in Guile :P
>
> I'm not sure we want to write our own crypto primitives... And it's
> not quite as trivial, I don't know or care what a Newton-Raphson
> algorithm is ;)
> http://stackoverflow.com/questions/24093199/a-pure-scheme-implementation-r5rs-of-sha256
I suspect it would be slow with Guile 2.0, and (guix hash) is used in
performance-critical locations.
That said, if there’s a need for it on the build side where performance
does not matter much, it makes sense to add a pure-Scheme
implementation. I think Weinhölt’s Industria library has one.
Alternately, we could make it easier to import (guix hash). All we need
is to create a custom (guix config) module where ‘%libgcrypt’ is found
to the right thing, or something like that.
HTH!
Ludo’.
prev parent reply other threads:[~2017-01-02 22:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-02 2:16 Guix build side - including modules (guix hash), (guix gcrypt): How to provide shared library? Danny Milosavljevic
2017-01-02 10:06 ` David Craven
2017-01-02 13:51 ` Danny Milosavljevic
2017-01-02 14:31 ` David Craven
2017-01-02 22:03 ` Ludovic Courtès [this message]
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