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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!news.ececs.uc.edu!news.kei.com!news.mathworks.com!www.nntp.primenet.com!nntp.primenet.com!arclight.uoregon.edu!news.bc.net!unixg.ubc.ca!noc.van.hookup.net!vertex.tor.hookup.net!nic.wat.hookup.net!news From: schaffer@wat.hookup.net Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Compiler bug? Date: 7 Nov 1996 18:34:09 GMT Organization: HookUp Communication Corporation, Waterloo, Ontario, CANADA Lines: 14 Message-ID: <55ta31$tib@nic.wat.hookup.net> References: <55p7ck$r2l@csgrad.cs.vt.edu> <55qdup$8jv@sol.ctr.columbia.edu> Reply-To: schaffer@wat.hookup.net NNTP-Posting-Host: schaffer.wat.hookup.net X-Newsreader: IBM NewsReader/2 v1.2 In <55qdup$8jv@sol.ctr.columbia.edu>, wpaul@ctr.columbia.edu (Bill Paul) writes: > ... >I believe you have invoked undefined compiler behavior with this code. >It is therefore not a bug that the result differs from one implementation >to another: undefined behavior means that the compiler can do anything Actually, it is even possible for the same compiler to produce different results, depending on which optimisation level was chosen for the compilation. > ... >-Bill Hartmann Schaffer