[XviD-devel] Linux (gcc) optimizations

[Christoph Lampert]

On Thu, 11 Dec 2003, Cameron Brunner wrote:

> On Wed, 10 Dec 2003 23:27:09 +0100, Edouard Gomez <ed.gomez at free.fr> wrote:
> 
> > Christoph Lampert (chl at math.uni-bonn.de) wrote:
> >> With "-fcgse" compiling failed on all SuSE 9. I myself updated an older
> >> version with a newer gcc and had the same problems now.
> >
> > Strange,  Debian uses  a  "latest gcc  release"  + CVS  updates (to  fix
> > regressions only afaik) and it does compile everything like a charm.
> >
> > Anyway,  go  ahead,  change  what  is  needed (in  the  first  lines  of
> > configure.in,    you'll   find    the    aggregated   default    compile
> > options).  According to  latest gcc  benchmarking  (the one  with a  DNA
> > based benchmarking procedure)  -03 gave best results for  most tests. We
> > should  just take  care of  additionnal  flags which  can cause  trouble
> > combined with -03.
> >
> > Someone feeling the courage to run the DNA banchmrking ? ;-)
> >
> 
> -O3 is evil on a gcc 3.2.2 from freebsd, be warned, i get core dumps if i 
> use O3 on 3.2.2 but on 3.3.3 -O3 is fine. Keep in mind that most people's 
> compilers are antique.

I would have opted for -O2, since the difference wasn't noticable anyway.
Any objections from any plattform against -O2 ? 

gruel