[meta-freescale] PACKAGECONFIG ?

[JC]

Hi,

I'm sorry about that, but it's impossible to find the information anywhere:

In many bb files you find some "PACKAGECONFIG" variables which are 
configure options, such as the following examples:


meta-multimedia/recipes-multimedia/sox/sox_14.4.0.bb:PACKAGECONFIG ??= 
"${@base_contains('DISTRO_FEATURES', 'pulseaudio', 'pulseaudio', '', d)} \
meta-multimedia/recipes-multimedia/sox/sox_14.4.0.bb:PACKAGECONFIG[pulseaudio] 
= "--with-pulseaudio=dyn,--with-pulseaudio=no,pulseaudio,"
meta-multimedia/recipes-multimedia/sox/sox_14.4.0.bb:PACKAGECONFIG[alsa] 
= "--with-alsa=dyn,--with-alsa=no,alsa-lib,"
meta-multimedia/recipes-multimedia/sox/sox_14.4.0.bb:PACKAGECONFIG[wavpack] 
= "--with-wavpack=dyn,--with-wavpack=no,wavpack,"

How can I tell bitbake to use / not use such options? for instance if I 
want to build sox with wavpack and without pulseaudio ?
There's probably something I should add somewhere in my local.conf, but 
I can't figure out what.

Thanks !

Regards
Jay