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From: diane@drao.nrc.ca (Diane Parchomchuk)
Newsgroups: comp.windows.x
Subject: PROBLEM WITH X TOOLKIT EXAMPLE
Message-ID: <187*diane@drao.nrc.ca>
Date: 14 Feb 91 02:16:00 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 29

I am working my way through the Douglas Young book, 'The X Window System...'
OSF/Motif edition.

PROBLEM: Chapter 10 examples fractal.c and fractal2.c.
Both compiled, no problem but on trying to run them I got a 
	FIXEDUP UNALIGNED DATA ACCESS FOR pid 17269(fractal2) at pc0x404684

Our system person told me that this error was due to RISC architecture, we are
running ULTRIX, 4.0, on a DecStation 3100. 

Consulting with the Dec people, they maintain it is due to sloppy programming
habits brought on by exposure to non-picky compilers.  Where is it written in
standard C that parameters HAVE to be passed in order of size?  Also in all of
X TOOLKIT you are working with predefined structures that are beyond your
control.  Are they all aligned so they will run on RISC machines?

I tried to rearrange the order of variables in the structure image_data to put
the type complex and float first.  Didn't help.

Any comments or fixes? 

Sorry if this is a bonehead gripe but I am running into too many brick walls!

Diane Parchomchuk
diane@drao.nrc.ca

ps. The Makefile tries to make Chapter 8 programs, there aren't any in the
tar file I got from expo - did I goof or did someone forget about poor ol'
ch8.