OK, I just figured out how to get my external not to crash when I turn on the audio. But as a newbe to compiling in linux, could you tell me what this error means?

fftbin~.c: In function `fftbin_tilde_perform': fftbin~.c:40: warning: implicit declaration of function `truncf'

Ive included <math.h>.

Sorry for all the trouble, I just found the Important functions in m_pd.h section of the externals howto.

Thanks, -thewade