From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Debugging info unavailability
Date: Tue, 02 May 2017 12:08:34 +0200
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References: <20170423020206.41aac1a2@scratchpost.org>
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In-Reply-To: <20170423020206.41aac1a2@scratchpost.org> (Danny Milosavljevic's
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To: Danny Milosavljevic <dannym@scratchpost.org>
Cc: guix-devel@gnu.org

Hi,

Danny Milosavljevic <dannym@scratchpost.org> skribis:

> just now I had to debug a doxygen Segmentation Fault.  I tried to install=
 doxygen:debug but that wasn't available.
>
> I think it would be nice if these outputs were available by default (but =
not installed by default).

Yeah, on of the reasons this is currently opt-in is disk space on hydra,
as noted in the manual (info "(guix) Installing Debugging Files").

There=E2=80=99s also the fact that packages that do not use the GNU build s=
ystem
will most likely not produce debugging info out of the box, so adding
=E2=80=9Cdebug=E2=80=9D automatically may break many packages.

> If we wanted to do that, we could just adapt guix/build-system/cmake.scm,=
 guix/build-system/gnu.scm and guix/build-system/glib-or-gtk.scm outputs de=
fault to say '("out" "debug") instead of '("out").

Rather we should change the default value of the =E2=80=98outputs=E2=80=99 =
field of
<package>.

The problem is that we=E2=80=99d have to add a line like:

  (outputs '("out"))

to all the packages that do not provide debugging symbols (such as
Perl/Python/Ruby packages), which could be a lot of them.  Or we could
provide:

  (define-syntax-rule (package/no-debug fields ...)
    (package
      (outputs '("out"))
      fields ...))

Thoughts?

Ludo=E2=80=99.