apple-sdk: add hack for C++ issues on `x86_64-darwin` (#397398)

          | .main_library.reexported_libraries[].names[] |= select([.] | inside($libs) | not)

        ' > usr/lib/$libSystem~

        # Convert libSystem back to tbd-v4 because not all tooling supports the JSON-based format yet.

        llvm-readtapi -delete-input --filetype=tbd-v4 usr/lib/$libSystem~ -o usr/lib/$libSystem

        llvm-readtapi --filetype=tbd-v4 usr/lib/$libSystem~ -o usr/lib/$libSystem

        rm usr/lib/$libSystem~

      done

      # Strip weak C++ symbols to work around `libc++` leakage in system

      # frameworks for now. These are only present on `x86_64-darwin`, so

      # it should hopefully be harmless.

      #

      # TODO FIXME: This is kind of horrible.

      while read -r -d "" stub; do

        printf 'Stripping weak C++ symbols from %s\n' "$stub"

        llvm-readtapi --filetype=tbd-v5 "$stub" \

        | jq '

          (.main_library, .libraries[]?).exported_symbols[]?.data.weak[]? |=

            select(startswith("__Z") | not)

        ' > $stub~

        llvm-readtapi --filetype=tbd-v4 $stub~ -o $stub

        rm $stub~

      done < <(find . -name '*.tbd' -print0)

    '';

}

  enabledModules ? [ ],

  bzip2,

  apple-sdk_14, # earlier SDKs cause linking issues on x86_64

  callPackage,

}@inputs:

    ]

    ++ optionals effectiveStdenv.hostPlatform.isDarwin [

      bzip2

      apple-sdk_14

    ]

    ++ optionals enableDocs [

      doxygen

      throw "Please add a qtPlatformCross entry for ${plat.config}";

  # Per https://doc.qt.io/qt-5/macos.html#supported-versions: build SDK = 13.x or 14.x.

  # SDK 13.x causes weird linking errors on x86_64-darwin, so use 14.x

  darwinVersionInputs = [

    apple-sdk_14

  ];