[Insight-developers] Right way to refer to external library

[Kent Williams]

Quick question. For the FFT implementation I need to 1) add a configurati=
on=20
variable for selecting which FFT implementation to compile against 2) spe=
cify=20
where those library and include files reside.

I can safely assume we don't want to suck FFTW into the ITK source tree,=20
right?

If there's a particular feature that resembles what I'm trying to do=20
(conditionally include one of several external libraries) just point me a=
t it=20
and I'll use it as a template.