[PATCH] Precompiled header support on Cygwin

[Geoff Keating]

Earl Chew <earl_chew@agilent.com> writes:

> This patch detects extra alignment and file sizing requirements to
> enable precompiled header support on Cygwin.
> 
> Reliable collaboration between the two mmap() calls
> (gt_pch_save and the subsequent gt_pch_restore) requires use
> of Cygwin mmap.cc 1.78 or later.
> 
> I've tested this on i386-pc-cygwin.

This is OK.  Can you commit it?

> 2003-07-09  Earl Chew  <earl_chew@agilent.com>
> 
> 	* aclocal.m4: Add new macro to detect Win32 GetSystemInfo
> 	* configure.in: Detect Win32 GetSystemInfo
> 	* ggc-common.c (gt_pch_save): Perform extra alignment actions
> 	to allow Cygwin mmap() to succeed both here and later in
> 	during gt_pch_restore
-- 
- Geoffrey Keating <geoffk@geoffk.org>