[Bug libgcc/123976] GCC 15.2.0 (libgcc) does not build on PPC Mac OS X 10.5.8, Leopard, because of missing "md-unwind-def.h"

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123976

--- Comment #65 from Iain Sandoe <iains at gcc dot gnu.org> ---
(In reply to Iain Sandoe from comment #62)
> (In reply to Peter Dyballa from comment #61)
> > First failure, due to too old makeinfo (GNU texinfo 4.8):
> 
> Yes, 4.8 is too old...

However, it looks lik we might have a fix for that - I'm testing it.