Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!usc!snorkelwacker.mit.edu!bloom-beacon!ncd.COM!jim
From: jim@ncd.COM (Jim Fulton)
Newsgroups: comp.windows.x
Subject: Re: Xos.h
Message-ID: <9012012115.AA25526@hansen.com>
Date: 1 Dec 90 13:15:15 GMT
References: <9011302103.AA03766@andreas.wr.usgs.gov>
Sender: daemon@athena.mit.edu (Mr Background)
Organization: Network Computing Devices, Mountain View, CA
Lines: 15


    I'm afraid this is a naive question, but when is it necessary/appropriate
    to include Xos.h?

Whenever you need types are that are typically defined in:

	sys/types.h
	string.h vs. strings.h
	sys/file.h
	unistd.h
	struct timeval

In general, it is for system-dependent things.  If you are using Xt, then
it is automatically included by Intrinsic.h.  Most raw Xlib programs in R4
include it.