Okay, so what do we do with the new errno?

[walt]

After today's update I started to recompile all of my ports again
(yes, I was well aware that I must) but the first port I tried
(bash) died because of this line in psize.c:
extern int errno;

and this obviously conflicts with the definition in /usr/include/errno.h

extern __thread int  errno;

So -- what kind of patching does bash need?  The bash port might be a
useful place to explain how this is going to work.  I see that errno.h
includes a message about ports that want to define errno as a normal
'int' but the provided workaround doesn't seem to work:
#define errno   errno

Is that really the intended definition, or a typo?

Thanks for any clues.