depot/third_party/nixpkgs/pkgs/development/libraries/libepoxy/default.nix

{ lib, stdenv, fetchFromGitHub, autoreconfHook, pkg-config, utilmacros, python3
, libGL, libX11
}:

with lib;

stdenv.mkDerivation rec {
  pname = "libepoxy";
  version = "1.5.4";

  src = fetchFromGitHub {
    owner = "anholt";
    repo = pname;
    rev = version;
    sha256 = "0rmg0qlswn250h0arx434jh3hwzsr95lawanpmh1czsfvrcx59l6";
  };

  outputs = [ "out" "dev" ];

  nativeBuildInputs = [ autoreconfHook pkg-config utilmacros python3 ];
  buildInputs = [ libGL libX11 ];

  preConfigure = optionalString stdenv.isDarwin ''
    substituteInPlace configure --replace build_glx=no build_glx=yes
    substituteInPlace src/dispatch_common.h --replace "PLATFORM_HAS_GLX 0" "PLATFORM_HAS_GLX 1"
  '';

  patches = [ ./libgl-path.patch ];

  NIX_CFLAGS_COMPILE = ''-DLIBGL_PATH="${getLib libGL}/lib"'';

  doCheck = false; # needs X11

  meta = {
    description = "A library for handling OpenGL function pointer management";
    homepage = "https://github.com/anholt/libepoxy";
    license = licenses.mit;
    maintainers = with maintainers; [ goibhniu erictapen ];
    platforms = platforms.unix;
  };
}