From mboxrd@z Thu Jan  1 00:00:00 1970
From: Timothy Sample <samplet@ngyro.com>
Subject: bug#36972: ghc-8.6.5 won't complete its build phase
Date: Fri, 09 Aug 2019 21:26:14 -0400
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 (Brian Leung's message of "Fri, 9 Aug 2019 10:11:05 +0200")
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To: Brian Leung <bkleung89@gmail.com>
Cc: 36972-done@debbugs.gnu.org

Hi Brian,

Brian Leung <bkleung89@gmail.com> writes:

> Hi Tim,
>
> Thanks for your response. I've tried upgrading again and everything
> works fine. For whatever reason, when I tried upgrading last time,
> there was no indication that the tests ever started running, not even
> a couple of hours after the build phase appeared to reach 100%.

That=E2=80=99s certainly odd.  I would have expected it to indicate that it=
 had
started the check phase.  Without a way to reproduce this, I doubt we=E2=80=
=99ll
be able to fix it.  For that reason, I=E2=80=99m opting to close this bug n=
ow.
However, if you notice anything like this again, we can always reopen
it.

> One last question: I notice from haskell.scm that "ghc" presently
> refers to ghc-8, which refers to ghc-8.4. If this is the case (I guess
> I'm probably wrong in my understanding), why did Guix choose to
> upgrade my installation of 8.4 to 8.6 at all?

The default GHC version for building Guix=E2=80=99s Haskell packages is 8.4=
.3,
but the newest version is 8.6.5.  When you tell Guix that you want =E2=80=
=9Cghc=E2=80=9D
it finds the latest version, rather than the version it uses for other
packages.  This is the same as GCC.  Even though Guix uses GCC 5 as it=E2=
=80=99s
default compiler, if you install =E2=80=9Cgcc-toolchain=E2=80=9D, you=E2=80=
=99ll get version 9.
This all happens based on the =E2=80=9Cname=E2=80=9D fields of the packages=
 rather than
the Guile variables used to refer to them.  Hence the =E2=80=9Cghc=E2=80=9D=
 variable
name is only meaningful insofar as it=E2=80=99s what the Haskell build syst=
em
uses as its default compiler.


-- Tim