Re: Optimisation of Ups

From: Andi Kleen (ak_at_suse.de)
Date: Mon Dec 11 2000 - 14:42:59 GMT

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On Mon, Dec 11, 2000 at 08:38:56AM +0000, Tim Launchbury wrote:
> Hi all;
> 
> An interesting bug/feature I came across a few weeks ago. I decided to
> do some optimisation on my Slackware 7 linux box and compiled the c
> library (2.1.13) optimised for the k6 processor. Ups then failed to run
> ( I don't remember all the details, but it failed to parse some file or
> other). I recompiled the c lib again without the optimisation and ups
> ran fine once more. Has anyone else seen this sort of thing before?

You probably forgot to enable frame pointers in the libc (= compiled
with -fomit-frame-pointer). ups cannot backtrace without that and also
does not seem to be able to find the start of functions.


-Andi

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