text: /*
   *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
   *
   *  Use of this source code is governed by a BSD-style license
   *  that can be found in the LICENSE file in the root of the source
   *  tree. An additional intellectual property rights grant can be found
   *  in the file PATENTS.  All contributing project authors may
   *  be found in the AUTHORS file in the root of the source tree.
   */
  
  #ifndef RTC_BASE_SYSTEM_RTC_EXPORT_H_
  #define RTC_BASE_SYSTEM_RTC_EXPORT_H_
  
  // RTC_EXPORT is used to mark symbols as exported or imported when WebRTC is
  // built or used as a shared library.
  // When WebRTC is built as a static library the RTC_EXPORT macro expands to
  // nothing.
  
  #ifdef WEBRTC_ENABLE_SYMBOL_EXPORT
  
  #ifdef WEBRTC_WIN
  
  #ifdef WEBRTC_LIBRARY_IMPL
  #define RTC_EXPORT __declspec(dllexport)
  #else
  #define RTC_EXPORT __declspec(dllimport)
  #endif
  
  #else  // WEBRTC_WIN
  
  #if __has_attribute(visibility) && defined(WEBRTC_LIBRARY_IMPL)
  #define RTC_EXPORT __attribute__((visibility("default")))
  #endif
  
  #endif  // WEBRTC_WIN
  
  #endif  // WEBRTC_ENABLE_SYMBOL_EXPORT
  
  #ifndef RTC_EXPORT
  #define RTC_EXPORT
  #endif
  
  #endif  // RTC_BASE_SYSTEM_RTC_EXPORT_H_
  