On Sat, Apr 11, 2020 at 08:44:29AM +0200, Florian Weimer wrote:
> > Gcc provides two ways to enable support for these instructions at build
> > time.  The simplest, and least disruptive, is to enable -moutline-atomics
> > globally in the arm64 glibc build.
> Shouldn't GCC do this by default, at least for -mtune=generic?

Maybe.  Would you rather pursue that avenue first?

At least if I'm reading the code right (which I may very well not be
doing, being generally unfamiliar with gcc internals), -mtune=generic
enables the equivalent of ARMv8 support:





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