8fc472d96a
Atomics in C and C++ are incompatible at the moment and mixing the headers can result in confusing error messages. Emit an error explicitly telling about the incompatibility. Introduce the macro `__ALLOW_STDC_ATOMICS_IN_CXX__` that allows to choose in C++ between C atomics and C++ atomics. rdar://problem/27435938 Reviewers: rsmith, EricWF, mclow.lists Reviewed By: mclow.lists Subscribers: jkorous-apple, christof, bumblebritches57, JonChesterfield, smeenai, cfe-commits Differential Revision: https://reviews.llvm.org/D45470 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@331379 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
801 B
C++
29 lines
801 B
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// UNSUPPORTED: libcpp-has-no-threads
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//
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// <atomic>
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// Test that including <atomic> fails to compile when we want to use C atomics
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// in C++ and have corresponding macro defined.
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// MODULES_DEFINES: __ALLOW_STDC_ATOMICS_IN_CXX__
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#ifndef __ALLOW_STDC_ATOMICS_IN_CXX__
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#define __ALLOW_STDC_ATOMICS_IN_CXX__
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#endif
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#include <atomic>
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// expected-error@atomic:* {{<stdatomic.h> is incompatible with the C++ standard library}}
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int main()
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{
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}
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