[FFmpeg-devel] Memory leak using bitstream filters with shared libs

Michael Niedermayer michaelni
Tue Mar 11 21:14:11 CET 2008

 On Tue, Mar 11, 2008 at 09:20:06PM +0200, Uoti Urpala wrote:
> On Tue, 2008-03-11 at 18:52 +0100, Michael Niedermayer wrote:
> > I guess i should refuse a workaround until the bug has been reported, maybe
> > they do fix it. But even if not it should be reported.
> And what is the "bug"? That you can't both change what the symbols are
> bound to AND keep them the same to match what they're bound to
> elsewhere? I wouldn't expect a fix for that dilemma...

There is just one symbol and that is in the library
-Bsymbolic as it is documented removes the special feature of ELF shared
libs to override such symbols. The C standard (as well as common sense)
requires all references to the symbol to be equal. This is not optional
or dependant on command line options. Its a strict requirement of C.
The bug is that this requirement is broken when the lib is compiled with
PIC and -Bsymbolic and the main app is not compiled with PIC.

> Maybe you could get them to explain the problem more clearly in the
> documentation,

And this would be better than the current situation ...

> but don't expect them to change the documented semantics
> of -Bsymbolic. 

Where is that documentation which says that the main app will see a different
symbol than the lib with -Bsymbolic. Its certainly not in the documentation of
-Bsymbolic, as such these are not the "documented semantics".

> If you want another option that does something different
> that's a separate feature request, not a bugfix.

I wonder why you cannot just accept that you were wrong ...


Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Let us carefully observe those good qualities wherein our enemies excel us
and endeavor to excel them, by avoiding what is faulty, and imitating what
is excellent in them. -- Plutarch
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