Re: CVS commit: pkgsrc/multimedia/ffmpeg

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

> > Disable use of SSE2 accelerations if compiled with gcc<4.2
> What kind of crashes? i386 or amd64?

I've been getting SEGVs on i386, in ff_x264_deblock_v_luma_sse2.
This was easily reproducible with DVDStyler-1.7.3rc2 (which is
not in pkgsrc yet, unfortunately the last stable version does
not build against the ffmpeg snapshot in pkgsrc), when selecting
a background for the DVD menu.
gcc-4.1 does definitely create wrong code -- I've been dealing
with that stuff in liboil a while ago. On amd64 the initial
stack alignment could help, but I don't know what happens
if _m128 variables are mixed with other allocations in the same
stackframe.

best regards
Matthias

Btw, it is not a good idea to strip me from the mail recipient
list if the question is directed to me.



------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------
Forschungszentrum Juelich GmbH
52425 Juelich
Sitz der Gesellschaft: Juelich
Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe
Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender),
Dr. Ulrich Krafft (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
Prof. Dr. Sebastian M. Schmidt
------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------