* Zbigniew Jędrzejewski-Szmek:

> And -Ofast is not something that can be enabled as a default build flag,
> because it leads to surprising and unpredictable behaviour in some
> cases. (*)

I assume (*) refers to the the strange-action-at-distance issue.  It was
recently fixed in GCC:

  --funsafe-math-optimizations is unexpectedly harmful, especially w/ -shared 
  <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55522>

Thanks,
Florian
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