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haskell / ghcup-hs

https://www.haskell.org/ghcup/
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ghc-pkg mismatch with ghc-9.0.1-alpha1 #83

Open hasufell opened 4 years ago

hasufell commented 4 years ago

In GitLab by @alanz on Sep 30, 2020, 04:19

I installed ghc-9.0.1-alpha1 using ghcup.

Running cabal new-configure -fdev -froundtrip --enable-tests --with-compiler=ghc-9.0.1-alpha1 on ghc-exactprint gives

cabal: Version mismatch between ghc and ghc-pkg:
/home/alanz/.ghcup/bin/ghc-9.0.1-alpha1 is version 9.0.0.20200925
/home/alanz/.ghcup/bin/ghc-pkg is version 8.8.4

Note: 

$ ghc-9.0.1-alpha1 --version
The Glorious Glasgow Haskell Compilation System, version 9.0.0.20200925
$ ghc-pkg-9.0.1-alpha1 --version
GHC package manager version 9.0.0.20200925
hasufell commented 4 years ago

In GitLab by @alanz on Sep 30, 2020, 04:38

Note: putting in a symlink as

/home/alanz/.ghcup/ghc/9.0.0.20200925 -> ./9.0.1-alpha1

and then using

cabal new-configure -fdev -froundtrip --enable-tests --with-compiler=/home/alanz/.ghcup/ghc/9.0.0.20200925/bin/ghc

works as I would expect

hasufell commented 4 years ago

In GitLab by @maerwald on Sep 30, 2020, 05:34

mentioned in commit 281fb14d4cd40e2f635b77fb0f0c087f8c684e67

hasufell commented 4 years ago

In GitLab by @maerwald on Sep 30, 2020, 05:35

  1. added readme section https://gitlab.haskell.org/haskell/ghcup-hs#custom-ghc-version-names
  2. renamed the release in ghcup: https://gitlab.haskell.org/haskell/ghcup-hs/-/commit/281fb14d4cd40e2f635b77fb0f0c087f8c684e67

Pending action from cabal upstream: maybe we get a fix (for both old and new GHC).

hasufell commented 4 years ago

In GitLab by @bgamari on Oct 6, 2020, 04:38

We discussed a variety options for addressing this on IRC last week. In short, the problem is that it was never well-defined how a build tool is supposed to find the hc-pkg executable corresponding to a particular compiler. Cabal currently uses various heuristics for this but these break when the executable names are changed (e.g. when the version suffix of the ghc-pkg executable doesn't match ghc --numeric-version).

I think the correct solution here is to introduce a means for the build tool to query the compiler for its hc-pkg executable. Specifically, we can expose this information via ghc --info.

hasufell commented 4 years ago

In GitLab by @bgamari on Oct 6, 2020, 04:44

mentioned in issue ghc/ghc#18807

hasufell commented 4 years ago

In GitLab by @bgamari on Oct 6, 2020, 04:50

I have opened ghc/ghc#18807 to track this and have implemented in ghc/ghc!4214.

hasufell commented 3 years ago

In GitLab by @maerwald on May 15, 2021, 20:05

https://github.com/haskell/cabal/pull/7392

hasufell commented 3 years ago

In GitLab by @maerwald on May 21, 2021, 22:53

mentioned in commit ghc/packages/Cabal@f78d2aaaa76b527f4f03032f256cf183c4ef8f5d

hasufell commented 3 years ago

In GitLab by @maerwald on Aug 12, 2021, 02:01

mentioned in commit ghc/packages/Cabal@c5da1d83c91d7dafed4898814eb05629e1cd82ae

hasufell commented 3 years ago

In GitLab by @maerwald on Sep 11, 2021, 01:18

This is fixed (with a hack) in cabal-3.6.0.0. It works for non-windows platforms only.