vlang: fix build on darwin

{ lib, stdenv, fetchFromGitHub, glfw, freetype, openssl, makeWrapper, upx, pkgsStatic, xorg, binaryen }:

{ lib, stdenv, fetchFromGitHub, glfw, freetype, openssl, makeWrapper, upx, pkgsStatic, xorg, binaryen, darwin }:

let

  version = "weekly.2023.19";

    rev = "6e970bd0a7459ad7798588f1ace4aa46c5e789a2";

    hash = "sha256-hFf7c8ZNMU1j7fgmDakuO7tBVr12Wq0dgQddJnkMajE=";

  };

  boehmgcStatic = pkgsStatic.boehmgc.override {

    enableStatic = stdenv.isDarwin;

  };

in

stdenv.mkDerivation {

  pname = "vlang";

  nativeBuildInputs = [ makeWrapper ];

  buildInputs = lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.Cocoa;

  makeFlags = [

    "local=1"

  ];

  env.VC = vc;

  env.VFLAGS = if stdenv.isDarwin then

    # on darwin we need to add a manual link to libgc since it doesn't have a libgc.a

    "-cg -cc ${pkgsStatic.clang}/bin/clang -no-retry-compilation -ldflags -L${pkgsStatic.boehmgc}/lib -ldflags -lgc -ldflags -L${binaryen}/lib"

    # on darwin we need to add a manual link to libgc

    "-cc ${stdenv.cc}/bin/cc -no-retry-compilation -ldflags -L${boehmgcStatic}/lib -ldflags -lgc -ldflags -L${binaryen}/lib"

  else

    # libX11.dev and xorg.xorgproto are needed because of

    # builder error: Header file <X11/Xlib.h>, needed for module `clipboard.x11` was not found. Please install a package with the X11 development headers, for example: `apt-get install libx11-dev`.

  preBuild = ''

    export HOME=$(mktemp -d)

    mkdir -p ./thirdparty/tcc/lib

    cp -r ${boehmgcStatic}/lib/* ./thirdparty/tcc/lib

  ''

  # this step is not needed it's just to silence a warning

  # we don't use tcc at all since it fails on a missing libatomic

  + lib.optionalString stdenv.isLinux ''

    ln -s ${pkgsStatic.tinycc}/bin/tcc ./thirdparty/tcc/tcc.exe

    cp -r ${pkgsStatic.boehmgc}/lib/* ./thirdparty/tcc/lib

  '' + lib.optionalString stdenv.isDarwin ''

    # this file isn't used by clang, but it's just to silence a warning

    # the compiler complains on an empty file, so this makes it "close" to real

    substituteInPlace vlib/builtin/builtin_d_gcboehm.c.v \

        --replace "libgc.a" "libgc.la"

  '';

  # vcreate_test.v requires git, so we must remove it when building the tools.

  # vtest.v fails on Darwin, so let's just disable it for now.

  preInstall = ''

    mv cmd/tools/vcreate/vcreate_test.v $HOME/vcreate_test.v

  '' + lib.optionalString stdenv.isDarwin ''

    mv cmd/tools/vtest.v $HOME/vtest.v

  ''

  # builder error: Header file <Cocoa/Cocoa.h>, needed for module `clipboard` was not found.

  + lib.optionalString stdenv.isDarwin ''

    for flag in $NIX_CFLAGS_COMPILE; do

      if [[ $flag == /*/Library/Frameworks ]]; then

        VFLAGS+=" -ldflags -F$flag"

      fi

    done

  '';

  installPhase = ''

  # Return vcreate_test.v and vtest.v, so the user can use it.

  postInstall = ''

    cp $HOME/vcreate_test.v $out/lib/cmd/tools/vcreate_test.v

  '' + lib.optionalString stdenv.isDarwin ''

    cp $HOME/vtest.v $out/lib/cmd/tools/vtest.v

  '';

  meta = with lib; {

# doc: https://github.com/ivmai/bdwgc/blob/v8.2.2/doc/README.macros (LARGE_CONFIG)

, enableLargeConfig ? false

, enableMmap ? true

, enableStatic ? false

, nixVersions

}:

    "--enable-cplusplus"

    "--with-libatomic-ops=none"

  ]

  ++ lib.optional enableStatic "--enable-static"

  ++ lib.optional enableMmap "--enable-mmap"

  ++ lib.optional enableLargeConfig "--enable-large-config";