From altogether too much searching around with gcc -M, it looks
like the problem is that openbios has in its include directory an
asm/types.h. Because things added to the header search path by -I
shadow system headers and are global, this replaces the
<asm/types.h> that <asm/sigcontext.h> relies on, causing the
error. On aarch64, <bits/sigcontext.h> (which I think <signal.h>
includes?) imports <asm/sigcontext.h>, so the whole thing fails to
build. On x86_64, <bits/sigcontext.h> does not import
<asm/sigcontext.h>, so this whole problem never occurs.
I don't know how to fix this on guix's end, but I guess I now need
to complain to upstream and hope they can work out a fix.
(I have a newfound hatred of #include.)
--
Andrew Patterson
