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fbe990481b
Recent Swift uses 2 as the is-Swift bit when running on newer versions, and 1 on older versions. Since it's difficult or impossible to know what we'll be running on at build time, make the selection at runtime.
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
//===--- BackDeployment.h - Support for running on older OS versions. -----===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_STDLIB_BACKDEPLOYMENT_H
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#define SWIFT_STDLIB_BACKDEPLOYMENT_H
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#if defined(__APPLE__) && defined(__MACH__)
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#include "swift/Runtime/Config.h"
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#include "../../../stdlib/public/SwiftShims/Visibility.h"
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#ifdef __cplusplus
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namespace swift { extern "C" {
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#endif
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#if SWIFT_CLASS_IS_SWIFT_MASK_GLOBAL_VARIABLE
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# ifndef __cplusplus
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// This file gets included from some C/ObjC files and
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// SWIFT_RUNTIME_STDLIB_SPI doesn't imply extern in C.
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extern
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# endif
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SWIFT_RUNTIME_STDLIB_SPI unsigned long long _swift_classIsSwiftMask;
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#endif
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/// Returns true if the current OS version, at runtime, is a back-deployment
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/// version.
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SWIFT_RUNTIME_STDLIB_INTERNAL
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int _swift_isBackDeploying();
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#ifdef __cplusplus
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}} // extern "C", namespace swift
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#endif
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#endif // defined(__APPLE__) && defined(__MACH__)
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#endif // SWIFT_STDLIB_BACKDEPLOYMENT_H
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