I'm trying to create an external to test if I can embed [rfft~] and [rifft~] in one object. This is just a test to see if I can get this right, before I implement this to another external. I'm stripping what I think is necessary from Pd's source code, but I already get the error in the subject line.
The FFTW3 library is used by Pd, and it is #included in the d_fft_fftw.c file. I have compiled Pd myself, and no such error occurred, so, this file must be somewhere in my system. Any idea how to solve this?