[FFmpeg-devel] [RFC][PATCH] Allow include files to be installed into subdirectory

Andreas Cadhalpun andreas.cadhalpun at googlemail.com
Mon Aug 11 20:29:57 CEST 2014

Hi Ivan,

On 11.08.2014 01:23, Ivan Kalvachev wrote:
> The patch is inspired by something I read in the Debian discussion.
> Libav and FFmpeg could be installed side by side without conflicts in
> the libraries, thanks to using additional suffixes.

Thanks for your interest in the matter.

> However development/include files are still conflicting, so I thought
> of a simple configure hack to give more control to FFmpeg.
> With this patch you can do `./configure --extra-incdir="/ffmpeg" ` ,
> as result the header files would be installed in
> "/usr/local/include/ffmpeg"
> e.g.
> "/usr/local/include/ffmpeg/libavcodec/avcodec.h"
> ...

Assuming it would be possible to install development packages for both 
at the same time, which one should be used, when building a program?

> The change is reflected in the pkgconfig files too. Since applications
> that link to libraries with addition suffixes should be using
> pkgconfig, they would be using the correct header includes
> automatically.

If that's to be determined via pkg-config files, then the obvious 
problem is that both install these files in the same location, and if 
one doesn't, programs can't find the library.

> I did just a rudimentary test and I couldn't spot anything wrong.
> Please test it before inclusion.

The patch seems to be alright, but it doesn't make it possible to make 
the development packages of FFmpeg and Libav co-installable.

> As for the future, it might be good idea next major release (e.g. 3.0)
> to have the $prefix/include/ffmpeg as default include path (for
> non-comapt build).

So this would also not help.

Best regards,

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