https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63829
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2014-12-06
Ever confirmed|0 |1
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Aaron Graham from comment #3)
> I've solved this problem in my own setup by building the toolchain and
> application binaries with the same -mcpu.
Yes, that's basically what you need to do if -mcpu can affect the availability
of atomics.
This has been known for some time (the same problem exists for i386 vs i486+)
but it seems to be causing problems on ARM more and more often. I think PR
42734 is the same issue.
