Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!CS.WISC.EDU!hagens
From: hagens@CS.WISC.EDU
Newsgroups: comp.windows.x
Subject: Re: Problem compiling X11R2 on Multiflow under BSD4.3
Message-ID: <8809021439.AA02654@janeb.cs.wisc.edu>
Date: 2 Sep 88 14:39:21 GMT
References: <210@torch.UUCP>
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
Lines: 21


> In article <392@gt-eedsp.UUCP> jensen@gt-eedsp.UUCP (P. Allen Jensen) writes:
> >In article <8808152028.AA18193@EXPO.LCS.MIT.EDU>, jim@EXPO.LCS.MIT.EDU (Jim 
Fulton) writes:
> >> 
> >> The R2 XtOffset macro causes compilers that are fairly picky about pointer
> >> arithmetic to complain.  The following version will be used in R3:
> >> 
> >> 	#define XtOffset(type,field) \
> >> 	        ((unsigned int) (((caddr_t) (&(((type)NULL)->field))) - \
> >> 	                         ((caddr_t) NULL)))

This does not work for an IBM PC RT with the hc compiler. Does anyone know
of a fix to the compiler or a work around?

(Yes, I know about the _offsetof macro -- the problem is that it does not
handle a field within a field: _offsetof(struct foo, a.b) will not
be accepted.

rob hagens
uw madison computer science