Thanx Johnathan to flip me back om my feet :) I got the picture, I will be as despotic as gcc is :) I will setup a uniq global setup in our Makefile -fno-builtin-exp2, it should not really hurt because I don't think we have place where we really meant we wanted the math.h version, and on the spot force #define exp2(x) __builtin_exp2((x)) when one really want to do math. Again thanx Cheers, Phi
