Messages in this thread |  | | Date | Sun, 22 Oct 2000 23:16:36 -0400 | From | David Relson <> | Subject | Re: Kernel 2.2.17 with RedHat 7 Problem ! |
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At 09:14 PM 10/22/00, Horst von Brand wrote: >Jurgen Kramer <GTM.Kramer@inter.nl.net> said: > > > You can blame it on the compiler which is included with RH7.0. It's a > > pre-release version of some sort. It seems that the gcc people are not > > happy that RH included this version with RH7. > >It is the *kernel's* fault, as far as can be ascertained now. The compiler >is stricter, and implements new optimizations, for which the kernel (being >only ever compiled with gcc) is just unprepared.
The problem, as I understand it, is that gcc-2.96 handles language constructs slightly different than older compilers. This is a preprocessor change, not an optimization problem.
To say "new optimizations ... kernel ... unprepared" is incorrect. Having worked with compilers (some years ago), I always took it as an article of faith that the same answer(s) would be generated whether optimization was turned on or not. Optimization should always be a way to do a task either quicker (fewer instructions executing, less executing time, etc) or shorter (less memory needed for the instructions). Optimization should never, never give a different result. Having new optimizations break an executing program is simply wrong.
David
>-- >Horst von Brand vonbrand@sleipnir.valparaiso.cl >Casilla 9G, Vin~a del Mar, Chile +56 32 672616
-------------------------------------------------------- David Relson Osage Software Systems, Inc. relson@osagesoftware.com 514 W. Keech Ave. www.osagesoftware.com Ann Arbor, MI 48103 voice: 734.821.8800 fax: 734.821.8800
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