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libstdc++, Darwin: Limit recursive mutex init to OS versions needing it.

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The problem described in pr 51906 was fixed in the next OS release.  Limit the
workaround to systems that need it.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

libstdc++-v3/ChangeLog:

	* config/os/bsd/darwin/os_defines.h
	(_GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC): Limit use of this macro
	to OS versions that need it.
This commit is contained in:
Iain Sandoe 2022-12-03 17:09:35 +00:00
parent e76a44bf68
commit a044c9d259
1 changed files with 5 additions and 1 deletions
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6
libstdc++-v3/config/os/bsd/darwin/os_defines.h
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@ -39,8 +39,12 @@
// implementation is not itself a weak definition).
#define _GLIBCXX_WEAK_DEFINITION __attribute__ ((__weak__))
// Static initializer macro is buggy in darwin, see libstdc++/51906
#if defined (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) \
&& (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1080)
// Static initializer macro is absent for Darwin < 11 and buggy in Darwin 11,
// see libstdc++/51906. Fixed in Darwin 12 (OS X 10.8).
#define _GTHREAD_USE_RECURSIVE_MUTEX_INIT_FUNC
#endif
// Configure checks for nanosleep fail on Darwin, but nanosleep and
// sched_yield are always available, so use them.