https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67064
--- Comment #9 from Daniel Gutson <daniel.gutson at tallertechnologies dot com> --- Thanks Ville and Jens for looking into this. I'll be able to fix this during next week, so if nobody is available to solve this sooner, then please assign it to me. Regarding the global register variables, it's a GNU C extension (see https://gcc.gnu.org/onlinedocs/gcc/Explicit-Reg-Vars.html), but I think it should be rejected when compiling in strict mode (e.g. -ansi or -std=c++14). I think this should be filed as a separate issue.
