GNU bug report logs - #48944
haskell build-system cannot build pcg-random

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From: John Kehayias <john.kehayias <at> protonmail.com>
To: "48944 <at> debbugs.gnu.org" <48944 <at> debbugs.gnu.org>
Subject: bug#48944: haskell build-system cannot build pcg-random
Date: Wed, 23 Jun 2021 21:54:12 +0000

[Message part 1 (text/plain, inline)]

Hello,

I also see this error for building packages that need cabal-doctest, as the configure step needs the package database. There's actually some packages in guix that already modify the configure step to do this, like ghc-cairo: https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/packages/haskell-xyz.scm#n1465

As noted there, the package database should be passed to runhaskell itself, not just what it runs. This would allow other packages that need a module for configuring to work. Attached is a patch to modify haskell-build-system to do this, though not only for the configure command (seemed easiest to just do that for now). I'm submitting the patch with comments there about possible modifications.

I can confirm with this that pcg-random builds, as well as packages I've been trying that need cabal-doctest (note, I tested using guix's package of cabal-doctest, no need to add that as well).

Comments welcome here, especially as I'm pretty new to Haskell still and guix completely, or on patch submission (sending shortly).

John

[runhaskell-add-pkgdb.patch (text/x-patch, attachment)]

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