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libstdc++: Only use __gthread_yield if gthreads is available

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libstdc++-v3/ChangeLog:

	* include/std/mutex (__lock_impl): Check
	_GLIBCXX_HAS_GTHREADS before using __gthread_yield.
This commit is contained in:
Matheus Castanho 2021-07-09 15:13:38 +01:00 committed by Jonathan Wakely
parent 7802ee7b01
commit 2e345e4ad6
1 changed files with 1 additions and 1 deletions
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libstdc++-v3/include/std/mutex
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@ -618,7 +618,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
return; return;
} }
} }
#ifdef _GLIBCXX_USE_SCHED_YIELD #if defined _GLIBCXX_HAS_GTHREADS && defined _GLIBCXX_USE_SCHED_YIELD
__gthread_yield(); __gthread_yield();
#endif #endif
constexpr auto __n = 1 + sizeof...(_L1); constexpr auto __n = 1 + sizeof...(_L1);