From owner-freebsd-bugs  Mon Mar 19 14:15: 3 2001
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To: G Hasse <gh@raditex.se>
Cc: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>,
	Peter Pentchev <roam@orbitel.bg>, freebsd-bugs@FreeBSD.ORG
Subject: Re: misc/25904: Error in the printf-function. 
In-reply-to: Your message of "Mon, 19 Mar 2001 20:41:01 +0100."
             <Pine.BSF.4.21.0103192040000.13646-100000@gandalf.sickla.raditex.se> 
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Date: Mon, 19 Mar 2001 22:11:48 +0000
From: David Malone <dwmalone@maths.tcd.ie>
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> And why is there differnces in Linux and FreeBSD? Is there
> some right and wrong here?

The double the %f was expecting would be 64 bits long on an i386.
The pointer was only 32 bits long, so when printf went to read the
other 32 bits it read something random out of memory (maybe the
return address, maybe some data from another function). The random
data was different so you got different results.

It is relatively hard to get a compiler and libraries to do the
same thing on every platform when they are used correctly. If you
use them incorrectly you can't expect any consistancey.

	David.

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