[MPlayer-users] layer2.c + gcc 3.3.1 + -fstrict-aliasing -> 'underwater sound'

[Attila Kinali]

On Sun, 21 Dec 2003 19:12:33 +0100
"Goetz Waschk" <waschk at informatik.uni-rostock.de> wrote:

> Am Fr 19 Dez 2003 23:25:20 GMT schrieb Henk Slager:
> > I am using stock SuSE 9.0 32bit and 64bit on an Athlon64 platform and
> > found out that software based on mpg123 (e.g. MPlayer-1.0pre2) compiles
> > wrong if -O2 is used for the whole mpg123 0.59s package. No segfaults or
> > so, but there is a strong  'underwater soundeffect', especially when the
> > source has quite some mid-and hi frequencies.
> [schnipp]
> > I wonder if the same happens with gcc 3.3.2 or newer; Anyone experienced
> 
> I've noticed this too with the 'optimized build' of my Mandrake Cooker
> package of mplayer 1.0pre3. The current Cooker has gcc 3.3.2 and the
> normal build with these flags "-O2 -fomit-frame-pointer -pipe -march=i586
> -mcpu=pentiumpro" overwriting the default is OK, while the optimized
> build with configure's flags and disabled CPU detection creates the
> effect mentioned above.

These 3 reports sound like gcc bugs, please report to the gcc team.

			Attila Kinali
-- 
egp ist vergleichbar mit einem ikea bausatz fuer flugzeugtraeger
			-- reeler in +kaosu