configure do
  unless File.exists?("wfobj/WFObj.cc")
    $stderr.puts "git submodules appear to be missing. Run `git submodule update --init`."
    exit 1
  end
  if RUBY_PLATFORM =~ /mingw/
    check_lib "opengl32"
    check_lib "glu32"
    check_lib "mingw32"
  else
    check_lib "X11"
    check_lib "GL"
    check_lib "GLU"
  end
  check_lib "ode"
  check_cfg program: "sdl-config"
end

build do
  Environment.new do |env|
    system("make -C LoadFile")
    env["CCFLAGS"] = %w[-O2 -Wall]
    env["CPPPATH"] += %w[.]
    sources = ["dwscr.cc", "wfobj/WFObj.cc", "LoadFile/LoadFile.cc"] + glob("ss/*.{cc,cpp}")
    if RUBY_PLATFORM =~ /mingw/
      sources += ["displayinfo-win32.cc"]
    else
      sources += ["displayinfo.cc"]
    end
    dwscr = env.Program("dwscr", sources)
    if RUBY_PLATFORM =~ /mingw/
      env.Install("C:/Windows/dwscr.scr", dwscr)
    end
  end
end