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Re: [Patch, toplevel/config] fix tls.m4 configure race condition (bootstrap/PR43170)

* Jakub Jelinek wrote on Tue, Jun 08, 2010 at 09:15:57PM CEST:
> The test is testing for a bug in old glibcs which was violating the __thread
> property, and I believe you really need some optimization barriers for the
> test, otherwise some smart optimization in the future will optimize the test
> away and let it succeed on buggy old glibcs.

Thank you, finally we are getting somewhere!  I think this paragraph
should be put in a comment before the test in tls.m4.
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