On Thu, 2014-06-12 at 07:26 -0500, Segher Boessenkool wrote: > But, indeed, it does look like GCC doesn't use it. It seems to me > that > some ABI forbade userland (or non-libraries or whatever) from using > it. > I'll see what I can find out. I can still use -ffixed-cr5 for safety no ? Cheers, Ben.