{
  global:
    vkGetInstanceProcAddr;
    vkGetDeviceProcAddr;
    vkEnumerateInstanceLayerProperties;
    vkEnumerateInstanceExtensionProperties;
    vkNegotiateLoaderLayerInterfaceVersion;
    vkEnumerateDeviceLayerProperties;
    vkEnumerateDeviceExtensionProperties;
  local:
    *;
};