Re: [PATCH 0/3] add c-ares and aria2

[Ludovic Courtès]

Efraim Flashner <address@hidden> skribis:

> This patch has driven me crazy a bit. C-ares is a library for asynchronous 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 the
> build chroot. Disabling the tests was the easy part.

It’s 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 “localhost” 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
  # … build fails
  cd /tmp/nix-build*aria2*
  source environment-variables
  pkg-config c-ares --libs

(Replace “c-ares” 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’.