ArmVirtPkg/Include/Platform/Hidden.h

   1 /** @file
   2
   3   Copyright (c) 2018, Linaro Limited. All rights reserved.
   4
   5   SPDX-License-Identifier: BSD-2-Clause-Patent
   6
   7 **/
   8
   9 #ifndef __PLATFORM_HIDDEN_H
  10 #define __PLATFORM_HIDDEN_H
  11
  12 //
  13 // Setting the GCC -fvisibility=hidden command line option is not quite the same
  14 // as setting the pragma below: the former only affects definitions, whereas the
  15 // pragma affects extern declarations as well. So if we want to ensure that no
  16 // GOT indirected symbol references are emitted, we need to use the pragma, or
  17 // GOT based cross object references could be emitted, e.g., in libraries, and
  18 // these cannot be relaxed to ordinary symbol references at link time.
  19 //
  20 #pragma GCC visibility push (hidden)
  21
  22 #endif