Date: Tue, 9 May 2000 08:56:40 -0400
Message-Id: <200005091256.IAA24973@envy.delorie.com>
From: DJ Delorie <dj AT delorie DOT com>
To: eliz AT is DOT elta DOT co DOT il
CC: djgpp-workers AT delorie DOT com
In-reply-to: <Pine.SUN.3.91.1000509115251.946E-100000@is> (message from Eli
	Zaretskii on Tue, 9 May 2000 11:53:10 +0300 (IDT))
Subject: Re: Perfomance of gc-simple
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> > Note that ggc-page also uses /dev/zero, which djgpp doesn't have.
> 
> This should be easy to provide via an FSEXT.  If the code is private
> to GCC sources, none of the complications with using FSEXT in the
> library apply.

Cygwin has /dev/zero, and it fails anyway.  I suspect there's some
subtle functionality in /dev/zero that I didn't emulate right.  If we
add /dev/zero to djgpp, it needs to be tested well, and it needs to
work *right* or it will cause subtle problems.

> > Or, it needs to be able to map anonymous pages, which may also be
> > hard with DJGPP.
> 
> Does that "Or" mean that if /dev/zero is available, mapping anonymous
> pages is not required?  Or does gcc-page require mapping in any case?

It means I don't know.  I just saw separate conditionals for those
cases.