linux-kernel - Re: [PATCH 1/3]: Replace kernel/timeconst.pl with kernel/timeconst.sh

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Date:	Sun, 04 Jan 2009 10:36:22 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Rob Landley <rob@...dley.net>, Sam Ravnborg <sam@...nborg.org>,
	Embedded Linux mailing list <linux-embedded@...r.kernel.org>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 1/3]: Replace kernel/timeconst.pl with kernel/timeconst.sh

Alan Cox wrote:
>> I note that sed and printf and such are all susv3.  I have an explicit test 
>> for 32 bit math in the script that cares, and this worked in Red Hat 9 circa 
>> 2003.
> 
> If you are trying to do arbitary precision maths using standard posix
> tools just use dc. That way the standard is explicit about what you will
> get.

The original patch used bc.  Unfortunately, it ran into bc bugs -- on
some platforms like some of akpm's older test machines it would just hang.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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