Including GDC in nixpkgs

Iain Buclaw ibuclaw at
Mon Oct 21 19:26:15 UTC 2019

On Wed, 25 Sep 2019 at 21:30, Stefan Frijters via D.gnu
<d.gnu at> wrote:
> On Sunday, 22 September 2019 at 10:29:24 UTC, Stefan Frijters
> wrote:
> > Hi Johannes,
> >
> > Thank you for the feedback. I've posted some more below so we
> > can try to find out what I'm doing wrong. I've added some blank
> > lines here and there to make things more readable, but it's all
> > very spammy I'm afraid.
> >
> > [...]
> Well, I've made some progress:
> * I still don't know what causes libtool to misbehave in
> parallel, but I've forced libphobos to be built with -j1, so
> that's at least a working workaround that doesn't slow down the
> rest of the build.
> * The nixpkgs wrappers for gcc introduce the -idirafter flag,
> which is not accepted by gdc. It looks like this causes the check
> for the '-fPIC' flag to fail, and the flag to be dropped. This is
> the cause of the linker error for the shared libs. I've hacked
> around for a bit and got rid of the flag at the point of the
> check, so libphobos now builds correctly (but still with a bunch
> of warnings).
> * I've added some nix code to generate a wrapper for gdc, like
> the ones that are generated for the rest of the GNU compiler
> family.

How does it go about building Ada or Go?  Surely those two frontends
will run into the same problem also.

> With these changes I can now build gdc + libraries and I've
> successfully built the example on the front page from a
> nix shell.
> The PR will need some reviewing from nixpkgs folks for sure since
> I did some nasty things.

If you need any other eyes to have a look over, don't be afraid to ping.


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