From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: [PATCH 0/3] add c-ares and aria2
Date: Tue, 03 Nov 2015 14:35:07 +0100
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References: <1446448523-27811-1-git-send-email-efraim@flashner.co.il>
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In-Reply-To: <1446448523-27811-1-git-send-email-efraim@flashner.co.il> (Efraim
	Flashner's message of "Mon, 2 Nov 2015 09:15:20 +0200")
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To: Efraim Flashner <efraim@flashner.co.il>
Cc: guix-devel@gnu.org

Efraim Flashner <efraim@flashner.co.il> skribis:

> This patch has driven me crazy a bit. C-ares is a library for asynchronou=
s DNS
> lookups, and aria2 is a cli program to download multiple files/torrents
> simultaneously, and also a git-annex dependency. C-ares builds without any
> problems, but aria2 was a different story. The first problem is that the =
tests
> seem to need network connectivity, and it tries to access files outside t=
he
> build chroot. Disabling the tests was the easy part.

It=E2=80=99s cheating!  ;-)  Could you investigate and see whether/how tests
could run in the build environment?  A common problem wrt. networking in
host name lookups.  In the build environment, only =E2=80=9Clocalhost=E2=80=
=9D can be
found.

> The second problem was that pkg-config wouldn't find c-ares, so it
> kept on building without it.

In that case, I would do this:

  guix build -K aria2
  # =E2=80=A6 build fails
  cd /tmp/nix-build*aria2*
  source environment-variables
  pkg-config c-ares --libs

(Replace =E2=80=9Cc-ares=E2=80=9D with the name corresponding to the actual=
 .pc file
provided by c-ares.)

It might be that this command fails because of a missing dependency that
the .pc file requires.

Ludo=E2=80=99.