[clug] Modifying build flags of debian package

[Adam Baxter]

Hi all,
I am using dpkg-buildpackage and I need to compile
http://deb.kamailio.org/kamailio/pool/main/k/kamailio/kamailio_3.3.0+wheezy1.tar.gz
with some extra flags (mainly -DNO_SMP)

Does anyone know where flags like this are passed into debian's
package building process?

Thanks,
Adam