PCH failures on cygwin

[Geoff Keating]

"Billinghurst, David (CRTS)" <David.Billinghurst@riotinto.com> writes:

> All the PCH tests on cygwin fail with
> 
> /usr/local/src/gcc/gcc/testsuite/gcc.dg/pch/common-1.c:-81: sorry, unimplemented: had to relocate PCH /usr/local/src/gcc/gcc/testsuite/gcc.dg/pch/common-1.c:-81: internal compiler error: Segmentation fault 
> 
> Any suggestions where I should start looking?

'had to relocate PCH' means that the mmap in gt_pch_restore didn't
produce the same address as the mmap in gt_pch_save.

If you can prevent this, that's generally the best choice.

-- 
- Geoffrey Keating <geoffk@geoffk.org>