From mboxrd@z Thu Jan  1 00:00:00 1970
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From: "Alfred M. Szmidt" <ams@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: busyloop in sigchld_handler
Date: Wed, 28 Mar 2007 17:30:47 +0200 (CEST)
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Cc: emacs-devel@gnu.org, storm@cua.dk
To: Chong Yidong <cyd@stupidchicken.com>
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   > Do all platforms have usleep ?

   usleep is not in POSIX, so we can't assume it exists.

Actually, usleep is in POSIX, but it is a extention (which just means
that one can use it satfley on any system supporting the X/Open System
Interfaces Extention), and marked as obsolete.