7 aug 2015 kl. 14.50 skrev Rainer Emrich <rai...@emrich-ebersheim.de>:

> This fixes the issue, libgom.sum attached. Can we have this in head and in 
> 4.x ?

That is probably the expedient solution even if we eventually get libgomp 
fixed. (The patch adds an extra cycle or two on some critical paths but I 
suppose we can live with that.)

>> Fixing libgomp is probably cleaner: either make sure the constructors are
>> run in the right order or initialize the acc_device_lock mutex statically.
> 
> Are you willing to work on this? I can't, I don't have the skills.

It looks quite straightforward actually, but probably better done by the 
libgomp maintainers upstreams.
A GCC bug has been filed: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67141


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