1 /* 2 * Copyright (c) 2018 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef RTC_BASE_SYSTEM_RTC_EXPORT_H_ 12 #define RTC_BASE_SYSTEM_RTC_EXPORT_H_ 13 14 // RTC_EXPORT is used to mark symbols as exported or imported when WebRTC is 15 // built or used as a shared library. 16 // When WebRTC is built as a static library the RTC_EXPORT macro expands to 17 // nothing. 18 19 #ifdef WEBRTC_ENABLE_SYMBOL_EXPORT 20 21 #ifdef WEBRTC_WIN 22 23 #ifdef WEBRTC_LIBRARY_IMPL 24 #define RTC_EXPORT __declspec(dllexport) 25 #else 26 #define RTC_EXPORT __declspec(dllimport) 27 #endif 28 29 #else // WEBRTC_WIN 30 31 #if __has_attribute(visibility) && defined(WEBRTC_LIBRARY_IMPL) 32 #define RTC_EXPORT __attribute__((visibility("default"))) 33 #endif 34 35 #endif // WEBRTC_WIN 36 37 #endif // WEBRTC_ENABLE_SYMBOL_EXPORT 38 39 #ifndef RTC_EXPORT 40 #define RTC_EXPORT 41 #endif 42 43 #endif // RTC_BASE_SYSTEM_RTC_EXPORT_H_ 44