Path: utzoo!attcan!uunet!world!decwrl!ucbvax!ANDREW.CMU.EDU!gk5g+
From: gk5g+@ANDREW.CMU.EDU (Gary Keim)
Newsgroups: comp.soft-sys.andrew
Subject: Re: AIX 3.1 build problem
Message-ID: <4b2ELhm00VsWM0Y8F4@andrew.cmu.edu>
Date: 2 Oct 90 21:26:05 GMT
References: <9010020409.AA13526@engrs.unl.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 22

Excerpts from internet.info-andrew: 1-Oct-90 AIX 3.1 build problem James
Nau@engrs.unl.edu (528)

> Seems there's a(nother) bug in the AIX optimizer.  The smallest chunk of
> code I could get to give the error is about 20 lines.  It's in
> ./overhead/class/class.c, function: class_ProcessClassPath().
> So, for now, class.c has to be compiled w/o -O.

> Now to call IBM and have them fix it...


Better hold off on that call to IBM.  There is a bug in the code that
processes the CLASSPATH environment variable.  It does pointer
comparisons between data that are not in the same array.  That is a no
no.  [Namely, it decrements a char * pointer off of the beginning of the
CLASSPATH string and then does a comparison with that pointer and a
pointer to the head of that string.]

Thanks for the helpful hint on the optimization, James.

Gary Keim
ATK Group