Re: gnu: ghc-8: Update to 8.0.2

[Ludovic Courtès]

Hi Federico,

Federico Beffa <address@hidden> skribis:

> I've updated our ghc-8 Haskell compiler to the latest version (8.0.2)
> and in doing so I've investigated why both 8.0.1 and 8.0.2 do not work
> without setting LD_LIBRARY_PATH to the required system libraries.
> I've found that NIX had the same problem.  The root cause for them was
> that their gcc-wrapper was not able to properly handle arguments
> passed through response files.  I suspect that we have the same
> problem.

We do.  (This and more was discussed at
<https://gcc.gnu.org/ml/gcc/2016-10/threads.html#00122>.)

But really, “response files” are relics.  OTOH, it may not be hard to
change ‘ld-wrapper’ to read them (and there’s a good opportunity now
that we’re working on ‘core-updates’, if you want to give it a try.
:-)).

> For the moment I've borrowed a patch for GHC that they did use before
> fixing the gcc-wrapper. Going forward it would probably be wise to fix
> our gcc/ld wrapper as well.

Sounds good.

> From 35c4fa12cf2eb7316583b41c0c4e8b60f7a59bdc Mon Sep 17 00:00:00 2001
> From: Federico Beffa <address@hidden>
> Date: Wed, 25 Jan 2017 18:21:43 +0100
> Subject: [PATCH] gnu: ghc-8: Update to 8.0.2.
>
> * gnu/packages/haskell.scm (ghc-8): Update to 8.0.2.

Please mention the changes to ‘arguments’ (deleted phase, etc.)

> * gnu/packages/patches/ghc-dont-pass-linker-flags-via-response-files.patch:
>   New file.
> * gnu/local.mk (dist_patch_DATA): Add it.


> +++ b/gnu/packages/patches/ghc-dont-pass-linker-flags-via-response-files.patch
> @@ -0,0 +1,24 @@
> +See 
> https://github.com/NixOS/nixpkgs/commit/a421e7bd4a28c69bded8b17888325e31554f61a1

Maybe add “Don’t add linker flags via ‘response files’ since ld-wrapper
doesn’t handle them.”

Also: https://gcc.gnu.org/ml/gcc/2016-10/msg00151.html

OK with these changes.

Thank you!

Ludo’.