Rainer Orth writes:
> 2012-02-13 Rainer Orth
>
> * configure.ac (libgo_cv_lib_makecontext_stack_top): Set on
> sparc*-*-solaris2.[89]*.
> (MAKECONTEXT_STACK_TOP): Define if appropriate.
> (libgo_cv_lib_setcontext_clobbers_tls): Use it.
> * configure: Regenerate.
>
The libgo setcontext TLS configure test was failing on Solaris 8 and
9/SPARC, breaking bootstrap due to the unhandled case in
runtime/proc.c. This turned out to be a known issue, documented in the
makecontext(3C) manpage:
NOTES
The semantics of the uc_stack member of the ucontext_t
