ludo@gnu.org (Ludovic Courtès) writes:

> Maxim Cournoyer <maxim.cournoyer@gmail.com> skribis:
>
>> ludo@gnu.org (Ludovic Courtès) writes:
>>
>>> 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’s also the fact that packages that do not use the GNU build system
>>> will most likely not produce debugging info out of the box, so adding
>>> “debug” 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 default to say '("out"
>>>> "debug") instead of '("out").
>>>
>>> Rather we should change the default value of the ‘outputs’ field of
>>> <package>.
>>>
>>
>> Adding the "debug" to the default value of <package> would every package
>> to now have a debug output; isn't this why Danny suggested to only
>> change it at the build system level? That way nothing which doesn't have
>> debugging symbols by default would break or have a useless debug output.
>
> Yes, it’s tempting to do it at the build-system level.  However, there
> would now be a discrepancy between the actual outputs of the package
> derivations and those of the package object: the package object would
> declare just one output, but the corresponding derivation would have two
> outputs.
>

Thanks for pointing that! It would be a Bad Thing indeed to introduce a
mismatch between the package definition and the corresponding store
item...

Possibly another Bad Idea, but we could leave things as they are... And
run a script which would rewrite (really, at the package definition
level) the package outputs to include "debug" for every package built
using the gnu/glib-or-gtk build systems? The commit will not be
pretty, that would bring us where we want to be? Being Scheme, that'd be
somewhat easy.

Maxim