[lttng-dev] [urcu commit] Fix TLS detection: test with linker, add --disable-compiler-tls

[Marek Vavruša]

Nice, I can confirm it compiles on OSX10.8 with default gcc and
autodisables __thread correctly.
It also builds with clang, __thread enabled/disabled.
For backported 0.7, i think the patch for MAP_ANONYMOUS compatibility needs
to be backported as well (if it's not already).
Great work, thanks!

Marek

On 9 November 2012 03:54, Mathieu Desnoyers
<mathieu.desnoyers at efficios.com>wrote:

> The following commit is now in the userspace RCU master branch
> (backported to stable-0.7 branch too). It should fix TLS detection on
> both NetBSD <= 5.1, and on Darwin, and adds a --disable-compiler-tls
> flag to force using the pthread_getspecific fallback.
>
>
> commit 75478b32ffe53b0d8b5e687d9cf7ebdd77a085de
> Author: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
> Date:   Thu Nov 8 21:45:04 2012 -0500
>
>     Fix TLS detection: test with linker, add --disable-compiler-tls
>
>     NetBSD 5.1 and older, as well as Darwin, succeed to compile code
>     containing TLS, but cannot link it. Test with linker in addition to
>     compiler for TLS support.
>
>     Also add a --disable-compiler-tls configure option to allow users to
>     force using the pthread getspecific fall back.
>
>     Fixes #288
>
>     Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
>
> Feedback is welcome!
>
> Thanks,
>
> Mathieu
>
> --
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com
>
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