[Ffmpeg-devel] How to reduce the ffmpeg avcodec.dll, avformat.dllsize

[Michael Niedermayer]

Hi

On Mon, Mar 20, 2006 at 10:31:05PM +0000, M?ns Rullg?rd wrote:
> Michael Niedermayer <michaelni at gmx.at> writes:
> 
> > Hi
> >
> > On Mon, Mar 20, 2006 at 09:44:43PM +0000, M?ns Rullg?rd wrote:
> >> Michael Niedermayer <michaelni at gmx.at> writes:
> >> 
> >> > Hi
> >> >
> >> > On Mon, Mar 20, 2006 at 09:44:44AM -0500, Rich Felker wrote:
> >> > [...]
> >> >> If code is not being removed by the compiler with some
> >> >> encoders/decoders disabled, it's probably because it's accidentally
> >> >> being used, due to function pointers in the data segment, etc.
> >> >
> >> > no, IIRC gcc until very recently (4.0 or so) did NOT support removing
> >> > unused static functions, and iam not even sure if latest gcc does it
> >> > by default
> >> 
> >> Unused static functions have been removed in the compilation phase for
> >> a long time.  You probably mean extern functions.  They can be
> >> referenced in much more subtle ways.
> >
> > nope, see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11278
> 
> The example there is a function that could be removed completely
> because it does nothing.  Unreferenced static functions are AFAIK
> always removed properly.

look at the example in the bugreport, compile it with gcc-3.3 or
older and look at the resulting binary, it will contain a
function which is static and not referenced by anything

[...]
-- 
Michael