Building Camino, Firefox, and Mozilla at the same time?

Anyone know how to make a .mozconfig that will build all three browsers
by just doing one make -f client.mk ?

I need to test some changes that affect all of them and just building
once would save a lot of time (I usally just builds Camino).

-- 
"Honesty is a somewhat overrated virtue"
Lucifer in conversation with the angel Remiel