Tell zlib not to use pkg-config

[chreekat]

(In GitLab CI)

[chreekat]

Hm, something weird happening on the Windows build. Looks like something else is trying to restart it, too, but I don't know what (or who?)

[Kleidukos]

@chreekat would you mind adding this badge to the README? <3

[Mikolaj]

Thank you.

[chreekat]

The failure on Windows sorta looks like it might be GHC's fault, but that is just my initial hunch.

To be systematic:

The error happens right at the end of the build. A successful build (e.g. https://gitlab.haskell.org/haskell/cabal/-/jobs/1797207) ends with:

Configuring executable 'cabal' for cabal-install-3.11.0.0..
Preprocessing executable 'cabal' for cabal-install-3.11.0.0..
Building executable 'cabal' for cabal-install-3.11.0.0..
[1 of 1] Compiling Main             ( main/Main.hs, /builds/haskell/cabal/dist-newstyle/build/aarch64-linux/ghc-9.2.3/cabal-install-3.11.0.0/x/cabal/build/cabal/cabal-tmp/Main.o )
Linking /builds/haskell/cabal/dist-newstyle/build/aarch64-linux/ghc-9.2.3/cabal-install-3.11.0.0/x/cabal/build/cabal/cabal ...
Uploading artifacts for successful job
Cleaning up project directory and file based variables
Job succeeded

But the Windows job ends with

Configuring executable 'cabal' for cabal-install-3.11.0.0..
Preprocessing executable 'cabal' for cabal-install-3.11.0.0..
Building executable 'cabal' for cabal-install-3.11.0.0..
[1 of 1] Compiling Main             ( main\Main.hs, C:\\GitLabRunner\builds\0\1797238\dist-newstyle\build\x86_64-windows\ghc-9.2.3\cabal-install-3.11.0.0\x\cabal\build\cabal\cabal-tmp\Main.o )
Linking C:\\GitLabRunner\\builds\\0\\1797238\\dist-newstyle\\build\\x86_64-windows\\ghc-9.2.3\\cabal-install-3.11.0.0\\x\\cabal\\build\\cabal\\cabal.exe ...
Cleaning up project directory and file based variables
ERROR: Job failed: exit status 127

So I guess this means cabal-install is exiting with status 127. I don't know what that means.

[chreekat]

The bug could also be with zlib.

In 0.6.3.0, zlib uses the vendored libz C library on Windows. In 0.7.0.0, when disabling pkg-config, it just uses extra-libraries: z, claiming in a comment that "On Windows, zlib is shipped with GHC starting from 7.10".

I'm gonna see if going back to using the vendored libz fixes the Windows build.

[chreekat]

Lord almighty, the Darwin job is building LLVM or something?! Amazing

[chreekat]

GitLab CI passed, so I will send to the bot.

[Mikolaj]

@mergify backport 3.12

[mergify]

backport 3.12

✅ Backports have been created

• #9939 Tell zlib not to use pkg-config (backport #9775) has been created for branch 3.12