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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: GNAT exception traceback
Date: 1997/06/20
Message-ID: <dewar.866851866@merv>#1/1
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References: <199706131810.OAA07239@seahunt.ctron.com> <dewar.866242346@merv>
 			<01bc7a82$c57186a0$2a208b82@wd> <dewar.866540788@merv>
 			<33A6A725.3BD0@no.such.com> <m2n2opc9mj.fsf@acm.org>
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 <33A85168.4E1A@no.such.com> <33A87008.6F0C@bix.com>
Organization: New York University
Newsgroups: comp.lang.ada
Date: 1997-06-20T00:00:00+00:00
List-Id: <comp.lang.ada>


Tom Moran said

<<As I recall Meridian Ada 83 on the Mac gave at least a one line
traceback telling where in the source code the exception occured.  Alsys
ActivAda Ada 83 on Windows similarly, Janus Ada 83 and 95 on PCs a full
traceback with source line references.  Why is it so hard for brand new
compilers to do what old ones have long done?  Have source code
references and long tracebacks been traditional or not on Unix
platforms?>>

It is often not hard to do for one particular architecture, and the PC
architecture is a particularly easy one to deal with.

The difficulty is in implementing this in anything like a machine dependent
fashion.

The reason that there are so many GNAT ports today is that the entire
phiolosophy of GCC has been to be extremely antagonistic to the
introduction of highly machine dependent stuff into the system!