On 09/16/2016 04:32 PM, Rich Felker wrote: [ ... ]
It would be useful to know what compiler version was used to build the kernel. I wouldn't be surprised if some are buggy.4.6.3 from kernel.org.That is utterly ancient and probaby very buggy. I would recommend 5.x+ or at the very least 4.7 or 4.8.
I found a toolchain with 5.3.0, and using it the problem disappears. Oh well. Sorry for the noise. Guenter