Hi Simon, Hi Matt, I think Simon has a point. I really do not enjoy creating a new throwaway project for every small reproducer I want to test. A cabal project means that I can't simply pass `-fforce-recomp -ddump-simpl -O` to a GHC invocation, for example. Instead I have to create a cabal file and remember all the fields that need to be set. (Or <enter> myself through a perceived 30 step wizard with `cabal new`, only to find that I have to open the file anyway to tweak build-depends...)
Stupid as it may be, that subconsciously really affects my willingness to tackle an issue. Presumably this can be solved through some amount of automation/scripting. Perhaps it would be enough to share these scripts in a prominent location, for example the Wiki. Alternatively, I think I would enjoy something like `nix-shell -p`, where I can just fire up a temporary shell with all the deps in a locally visible package db. That way I could keep calling `ghc` directly. (Not that I suffer *much* from this issue at the moment anyway.) Sebastian Am Di., 9. Juli 2024 um 11:21 Uhr schrieb Matthew Pickering < matthewtpicker...@gmail.com>: > `cabal install --lib` is very hard to use properly. I would advise against > it. > > It is much easier to create a simple cabal project and use normal > cabal build commands. I packaged things in a repo for you. > > https://github.com/mpickering/t25064 > > ``` > cabal build -w ghc-9.6.2 (fails) > cabal build -w /path/to/devel/compiler (fails with error message) > ``` > > Matt > > On Tue, Jul 9, 2024 at 9:58 AM Simon Peyton Jones > <simon.peytonjo...@gmail.com> wrote: > > > > Friends > > > > I'm trying to repro #25064 with my development build of GHC. The test > case depends on packages `primitive` and `hashtables`. So I try this (see > below). > > > > Alas, apparently after the `cabal install`, it can't find Prelude. > > > > What should I do? I tried removing the "environments" file, whatever > that is, which then meant it could find Prelude -- but the libraries were > no longer installed. > > > > I lack a decent model of what is going on with installing packages for > my development builds. Is there a write up anywhere? > > > > Thanks > > > > Simon > > > > > > bash$ cabal install --lib hashtables primitive --with-compiler > $HOME/code/HEAD/$s2 > > Warning: Unknown/unsupported 'ghc' version detected (Cabal 3.10.1.0 > supports > > 'ghc' version < 9.8): /home/simonpj/code/HEAD/_build/stage1/bin/ghc is > version > > 9.11.20240517 > > Warning: Unknown/unsupported 'ghc' version detected (Cabal 3.10.1.0 > supports > > 'ghc' version < 9.8): /home/simonpj/code/HEAD/_build/stage1/bin/ghc is > version > > 9.11.20240517 > > Resolving dependencies... > > bash$ ~/code/HEAD/$s2 -c T25064.hs > > Loaded package environment from > > T25064.hs:1:8: error: [ ]8;; > https://errors.haskell.org/messages/GHC-87110 \GHC-87110 ]8;; \] > > Could not load module ‘Prelude’. > > It is a member of the hidden package ‘base-4.20.0.0’. > > Use -v to see a list of the files searched for. > > | > > 1 | module Bug where > > | ^^^ > > > > bash$ rm > /home/simonpj/.ghc/x86_64-linux-9.11.20240517/environments/default > > bash$ ~/code/HEAD/$s2 -c T25064.hs > > T25064.hs:3:1: error: [ ]8;; > https://errors.haskell.org/messages/GHC-61948 \GHC-61948 ]8;; \] > > Could not find module ‘Control.Monad.Primitive’. > > Perhaps you meant Control.Monad.Writer (from mtl-2.3.1) > > Use -v to see a list of the files searched for. > > | > > 3 | import Control.Monad.Primitive > > | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > T25064.hs:4:1: error: [ ]8;; > https://errors.haskell.org/messages/GHC-87110 \GHC-87110 ]8;; \] > > Could not find module ‘Data.HashTable.ST.Basic’. > > Use -v to see a list of the files searched for. > > | > > 4 | import qualified Data.HashTable.ST.Basic as H > > | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > > > _______________________________________________ > > ghc-devs mailing list > > ghc-devs@haskell.org > > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >
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