[FFmpeg-devel] Symbol versioning failure on Android

Martin Storsjö martin
Mon Dec 13 15:01:47 CET 2010

On Thu, 9 Dec 2010, Martin Storsj? wrote:

> On Wed, 8 Dec 2010, Reimar D?ffinger wrote:
> > On Wed, Dec 08, 2010 at 11:07:19PM +0200, Martin Storsj? wrote:
> > > The even more straightforward solution would be to add an option 
> > > --disable-symver - then it's totally up to the user if he wants it or not. 
> > > The problem then, of course, is for the user to figure out that he 
> > > actually needs this (it isn't totally obvious what's wrong when the 
> > > application hangs when calling a symbol with multiple versions, where the 
> > > fallback calls itself).
> > 
> > Add a guard variable that detects that case.
> > Note: might be tricky without causing issues with multi-threading.
> Hmm, it might be good, but I'm not sure if it's worth littering all the 
> fallback symbols with such code, and it feels like overkill (if done 
> properly not to interfere with multithreading).
> Yet another suggestion attached, this one adds the option 
> --disable-symver.

Anyone opposed to applying this one? This way, we do no ugly magic or 
detection or anything such, and it's totally up to the person building it 
to disable it. And if the android runtime linker starts supporting it at 
some point in the future, users can stop using this option if they want to 
target the newer versions.

// Martin

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