[Ffmpeg-devel] [PATCH] fix for libavcodec/armv4l/mpegvideo_armv5te.c

[Michael Niedermayer]

Hi

On Mon, Jan 29, 2007 at 09:03:24PM +0200, Siarhei Siamashka wrote:
> On Monday 29 January 2007 15:43, you wrote:
> 
> > On 1/29/07, Dmitry Antipov <dmantipov at yandex.ru> wrote:
> >
> > > > Thanks for reporting this. Surely add and sub instructions on ARM have
> > > > 3 operands, but both gcc 3.4.4 and gcc 4.1.1 that I have tested,
> > > > accepted this code without any problems (maybe it is some kind of
> > > > syntax sugar?). Did this code break on your compiler? What version of
> > > > gcc do you have?
> > >
> > > I'm using (cross) gcc 3.4.3. Here is a failure report with gcc 4.0.2:
> > > http://lists.mplayerhq.hu/pipermail/mplayer-users/2007-January/065126.htm
> > >l (note this user probably has poorly configured compiler, btw.)
> >
> > Thanks a lot. I'll try to experiment with my compiler today in the
> > evening and will try to make it behave more strict in order to detect
> > and avoid such problems in the future.
> 
> Investigated this issue a bit. Looks like it is binutils version that matters 
> (as gnu assembler is part of this package). I have binutils 2.16.91 used 
> with gcc 2.4.4 (CodeSourcery ARM 2005q3-2) and also binutils 2.17 used 
> with gcc 4.1.1 (gentoo crossdev toolchain). I did not succeed in trying to
> find any option that would issue a warning about this nonstandard two 
> operand add instruction mnemonic :-(
> 
> According to [1], binutils 2.16.92 is the minimal version that supports EABI,
> so installing anything older is not an option. So I guess the only way to
> avoid such problems in the future is just be more carefull and rely on
> bugreports such as yours.

you could send a feature request to the binutils developers

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No snowflake in an avalanche ever feels responsible. -- Voltaire
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