Closed
Description
With ghc >=9.6 --abi-hash initialises plugins and will fail if a module in -fplugin=Foo.
$ ghc-9.4.7 --abi-hash -fplugin=Foo
921dcb31e865da25523dc30d4957f9c4
$ ghc-9.6.3 --abi-hash -fplugin=Foo
<command line>: Could not find module ‘Foo’
Use -v (or `:set -v` in ghci) to see a list of the files searched for.
This causes problems because the fix for #3633 removes the package DB from the arguments passed when calling ghc --abi-hash.
The code is here:
vanillaArgs =
-- Package DBs unnecessary, and break ghc-cabal. See #3633
-- BUT, put at least the global database so that 7.4 doesn't
-- break.
vanillaArgs0
{ ghcOptPackageDBs = [GlobalPackageDB]
, ghcOptPackages = mempty
}
To reproduce this issue with cabal-install and ghc 9.6.3 in the path:
$ cat test.cabal
cabal-version: 3.4
name: test
version: 0.1.0.0
build-type: Simple
library
exposed-modules: MyLib
build-depends: base, polysemy, polysemy-plugin
ghc-options: -Wall -fplugin=Polysemy.Plugin
hs-source-dirs: src
default-language: Haskell2010
$ cat src/MyLib.hs
module MyLib (someFunc) where
someFunc :: IO ()
someFunc = putStrLn "someFunc"
$ cabal v1-install .
Resolving dependencies...
Starting test-0.1.0.0
Building test-0.1.0.0
Failed to install test-0.1.0.0
Build log ( /Users/hamish/.cabal-devx/logs/ghc-9.6.3/test-0.1.0.0-2vHb5qpV3rnA1Gux1WyweH.log ):
cabal: Entering directory '.'
Configuring test-0.1.0.0...
Preprocessing library for test-0.1.0.0..
Building library for test-0.1.0.0..
Installing library in /Users/hamish/.cabal-devx/lib/x86_64-osx-ghc-9.6.3/test-0.1.0.0-2vHb5qpV3rnA1Gux1WyweH
Error: cabal: '/nix/store/9drimq6n088xzlpk56hc9k6zb7a46qch-ghc-9.6.3/bin/ghc'
exited with an error:
<command line>: Could not find module ‘Polysemy.Plugin’
Use -v (or `:set -v` in ghci) to see a list of the files searched for.
cabal: Leaving directory '.'
Error: cabal: Some packages failed to install:
test-0.1.0.0-2vHb5qpV3rnA1Gux1WyweH failed during the final install step. The
exception was:
ExitFailure 1
This problem does not seem to affect cabal v2-build, but it does break haskell.nix (input-output-hk/haskell.nix#2096).