[CMake] problems finding FLAC

[Zé]

Im building kdemultimedia4 and i have all flac files isntalled, however cmake 
isnt able to find the FLAC files, and outputs this:

-----------------------------------------------------------------------------
-- The following external packages were located on your system.
-- This installation will have the extra features provided by these packages.
+ taglib
+ OggVorbis
+ MusicBrainz
+ TunePimp
+ cdparanoia
-----------------------------------------------------------------------------
-- The following OPTIONAL packages could NOT be located on your system.
-- Consider installing them to enable more features from this software.
+ FLAC: An encoder/decoder for the Free Lossless Audio Codec 
<http://flac.sourceforge.net>
Required to build the AudioCD FLAC plugin.

the FLAC devel files are in /usr/lib/FLAC

Can anyone explain me howto do so that cmake can find FLAC files?


-- 
Zé
Linux user #378762