mistuke / cabalchoco Goto Github PK

Currently, the Chocolatey installers for cabal add MSYS2's /mingw64/lib to the extra-lib-dirs in the generated cabal config file. (See these lines). Unfortunately, this has a number of unfortunate consequences:

1. Due to GHC#21111, pre-9.4 versions of GHC will break if LIBRARY_PATH includes the most recent version of the MinGW-w64 C runtime. More pressingly, GitHub Actions has recently updated its MSYS2 version to include the latest MinGW-w64, and since haskell/actions uses these Chocolately installers to install cabal, this means that the vast majority of Windows CI setups are now effectively broken due to the augmented LIBRARY_PATH.
2. Even on GHC 9.4, which doesn't suffer from GHC#21111, augmenting LIBRARY_PATH is the wrong choice, since GHC 9.4 ships a Clang-based toolchain instead of a MinGW-w64–based one. Since the ABI that Clang uses is different from what MinGW-w64 uses, libraries that are built with MinGW-w64 are often not compatible with Clang. A more correct thing to put on the LIBRARY_PATH would be /clang64/lib, but even then, that would only work for GHC 9.4 or later.

For these reasons, I propose that the Chocolately installers not add directories from MSYS2 to the extra-lib-dirs.

Hi @Mistuke ! First of all thanks for chocolatey packages, they are the soul of haskell ci for windows

I am starting to use it in azure and the ps script is adding a extra-lib-dir that does not exist in azure.
So the builds are littered with the warning:

ghc.exe: addLibrarySearchPath: C:\tools\msys64\mingw64\lib (Win32 error 3): The system cannot find the path specified.

azure has a mingw installation; https://github.com/actions/virtual-environments/blob/master/images/win/Windows2019-Readme.md#mingw but no a msys64 one?

Can we have support for cabal-3.4 release candidate?

I can see cabal-3.4.0.0-rc3 listed, but it seems broken:

https://gist.github.com/choco-bot/3c4b83125a8bae73d1aecd195aa10e27

Genuinely curious, I usually don't even think about these sort of things but it struck me because it is so out of place and hilarious.

See https://downloads.haskell.org/~cabal/cabal-install-3.4.0.0/cabal-install-3.4.0.0-x86_64-windows.zip for the Windows bindist.