llvmPackages.libllvm: fix enablePolly = false (#444806)

  devExtraCmakeFlags ? [ ],

  getVersionFile,

  fetchpatch,

  # for tests

  libllvm,

}:

let

      ++ lib.optionals enablePolly [

        # Just like the `gnu-install-dirs` patch, but for `polly`.

        (getVersionFile "llvm/gnu-install-dirs-polly.patch")

      ]

      ++ [

        # Just like the `llvm-lit-cfg` patch, but for `polly`.

        (getVersionFile "llvm/polly-lit-cfg-add-libs-to-dylib-path.patch")

      ]

    checkTarget = "check-all";

    passthru = {

      # For the update script:

    passthru.monorepoSrc = monorepoSrc;

      inherit monorepoSrc;

      tests.withoutOptionalFeatures = libllvm.override {

        enablePFM = false;

        enablePolly = false;

        enableTerminfo = false;

      };

    };

    requiredSystemFeatures = [ "big-parallel" ];

    meta = llvm_meta // {