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Re: RFC: PATCH for thread-safe C++ static local initialization

>> Maybe we should *always* do the full code sequence.
>
>I think we should do it unless explicitly disabled, a la
>-fno-rtti/-fno-exceptions.

Presumably, those embedded systems (or other configurations) that don't
want this default sequence will configure with --disable-threads, which
will default to gthr-single.h, which doesn't define __GTHREADS, which
means none of this stuff will get pulled in for them anyway.

So, there is a way to disable this, as-is.

Jason, you're right that this code is more complex. It is also correct.
IMHO, we should just be using it by default, not figuring out a way to
subvert __cxa_guard_* functions.

-benjamin
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