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c1254e84a5
While RTC_EXPORT is aware of component builds (selecting "default" visibility only when WebRTC is built as a shared library), RTC_OBJC_EXPORT (which predates RTC_EXPORT) was always marking symbols as "default" visible. This CL fixes the problem but on the other hand it will require standalone builds of the WebRTC.framework to set the GN argument `rtc_enable_symbol_export` to true. No-Presubmit: True Bug: chromium:1159620 Change-Id: I4a16f9bd3c1564140a5a30f03b3e77caed1df591 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/198082 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Andreassson <henrika@webrtc.org> Reviewed-by: Nico Weber <thakis@chromium.org> Cr-Commit-Position: refs/heads/master@{#32856}
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
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* Copyright 2016 The WebRTC Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef SDK_OBJC_BASE_RTCMACROS_H_
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#define SDK_OBJC_BASE_RTCMACROS_H_
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#ifdef WEBRTC_ENABLE_SYMBOL_EXPORT
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#if defined(WEBRTC_LIBRARY_IMPL)
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#define RTC_OBJC_EXPORT __attribute__((visibility("default")))
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#endif
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#endif // WEBRTC_ENABLE_SYMBOL_EXPORT
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#ifndef RTC_OBJC_EXPORT
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#define RTC_OBJC_EXPORT
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#endif
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// Internal macros used to correctly concatenate symbols.
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#define RTC_SYMBOL_CONCAT_HELPER(a, b) a##b
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#define RTC_SYMBOL_CONCAT(a, b) RTC_SYMBOL_CONCAT_HELPER(a, b)
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// RTC_OBJC_TYPE_PREFIX
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//
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// Macro used to prepend a prefix to the API types that are exported with
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// RTC_OBJC_EXPORT.
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//
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// Clients can patch the definition of this macro locally and build
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// WebRTC.framework with their own prefix in case symbol clashing is a
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// problem.
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//
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// This macro must only be defined here and not on via compiler flag to
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// ensure it has a unique value.
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#define RTC_OBJC_TYPE_PREFIX
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// RCT_OBJC_TYPE
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//
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// Macro used internally to declare API types. Declaring an API type without
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// using this macro will not include the declared type in the set of types
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// that will be affected by the configurable RTC_OBJC_TYPE_PREFIX.
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#define RTC_OBJC_TYPE(type_name) RTC_SYMBOL_CONCAT(RTC_OBJC_TYPE_PREFIX, type_name)
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#if defined(__cplusplus)
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#define RTC_EXTERN extern "C" RTC_OBJC_EXPORT
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#else
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#define RTC_EXTERN extern RTC_OBJC_EXPORT
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#endif
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#ifdef __OBJC__
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#define RTC_FWD_DECL_OBJC_CLASS(classname) @class classname
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#else
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#define RTC_FWD_DECL_OBJC_CLASS(classname) typedef struct objc_object classname
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#endif
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#endif // SDK_OBJC_BASE_RTCMACROS_H_
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