{$IFDEF FPC}
  {$MODE Delphi}
  {$IFNDEF WINDOWS}
    {$LINKLIB c}
  {$ENDIF}
  {$MINENUMSIZE 4}
{$ENDIF}

{$IFDEF Win32}
  {$DEFINE VK_WIN}
  {$DEFINE VK_WIN32}
  {$DEFINE VK_USE_PLATFORM_WIN32_KHR}
{$ENDIF}

{$IFDEF Win64}
  {$DEFINE VK_WIN}
  {$DEFINE VK_WIN64}
  {$DEFINE VK_USE_PLATFORM_WIN32_KHR}
{$ENDIF}

{$IFDEF linux}
  {$DEFINE VK_LINUX}
  {$DEFINE VK_CDECL}
{$ENDIF}

{$IFDEF DARWIN}
  {$DEFINE VK_MAC}
  {$DEFINE VK_CDECL}
{$ENDIF}