pkgconfig problem on RHEL-5

[Dominik 'Rathann' Mierzejewski]

On Tuesday, 20 January 2009 at 11:35, Karel Volný wrote:
> 
> Hi,
> 
> > > I'd like to ask ... I am trying to compile ffmpeg plugin for
> > > qmmp, but cmake fails to recognize the needed libraries:
> > >
> > > ... snip ...
> > > -- checking for modules 'libavcodec;libavformat'
> > > --   package 'libavcodec' not found
> > > --   package 'libavformat' not found
> > > ... snip ...
> >
> > Are you sure ffmpeg-devel from the EL-5 testing repository was
> > actually installed on the buildroot ?
> 
> yes, I am pretty sure that it is available as I am trying that 
> live on my system (I mean manually running cmake, or make 
> x86_64)
> 
> > > I've also tried to run pkg-config on commandline:
> > >
> > > [root at dhcp-lab-227 rhel]# pkg-config libavcodec; echo $?
> > > 1
> > > [root at dhcp-lab-227 rhel]# pkg-config libavformat; echo $?
> > > 1
> >
> > you don't have requested anything at this time. So an empty
> > result was expected.
> 
> as far as I understand the docs, the exitcode indicates whether 
> the package can be used or not - 0 (on Fedora) is ok, 1 is bad
> 
> > Try with: 
> > [root at kwizatz firmware]# pkg-config libavcodec --libs
> > -lavcodecrpmfusion (yes, this is my own tweaked version,
> > should have been -lavcodec).
> 
> well, now it gets interesting:
> 
> [root at dhcp-lab-227 10]# pkg-config libavcodec --libs
> Package libraw1394 was not found in the pkg-config search path.
> Perhaps you should add the directory containing `libraw1394.pc'
> to the PKG_CONFIG_PATH environment variable
> Package 'libraw1394', required by 'libavcodec', not found
> 
> and the Fedora machine:
> 
> [root at F10 ~]# pkg-config libavcodec --libs
> -lavcodec
> 
> 
> so let's try yum install libraw1394-devel:
> 
> [root at dhcp-lab-227 10]# pkg-config libavcodec --libs
> Package theora was not found in the pkg-config search path.
> Perhaps you should add the directory containing `theora.pc'
> to the PKG_CONFIG_PATH environment variable
> Package 'theora', required by 'libavcodec', not found
> 
> ok, then yum install libtheora-devel:
> 
> [root at dhcp-lab-227 10]# pkg-config libavcodec --libs
> -lavcodec
> [root at dhcp-lab-227 10]# pkg-config libavformat; echo $?
> 0
> 
> 
> voila! - cmake can now detect ffmpeg correctly
> 
> thanks for the inspiration what to try
> 
> /me is going to file a bug about missing dependencies now

They're not missing. Most probably the .pc file is broken or it's a bug
in pkg-config.

Regards,
R.

-- 
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"Faith manages."
        -- Delenn to Lennier in Babylon 5:"Confessions and Lamentations"