[Xcb] [Bug 98048] libpthread-stubs must NOT provide symbols which depend on actual implementation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98048

--- Comment #14 from Ian Romanick <idr at freedesktop.org> ---
(In reply to Josh Triplett from comment #8)
> Is Mesa linking against the libc6 stubs, and then running in the
> single-threaded case?  Or does it somehow end up running against the real
> libpthread but also calling pthread-stubs functions?

As far as I can tell, it is single threaded, linked with libpthread (according
to ldd on the piglit test in question), and hitting pthread-stubs functions. 
The Valgrind stack trace in comment #0 shows /usr/lib64/libpthread-2.22.so.

Reverting fa6db2f9 seems to have fixed the problems in softpipe and NV20.

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