KISS FFT is built as static libraries.
Available libraries:
-lkiss_fft_${TYPE}
-lkiss_fftnd_${TYPE}
-lkiss_fftndr_${TYPE}
-lkiss_fftr_${TYPE}
-lkiss_kfc_${TYPE}
where ${TYPE} is float, double, int16, or int32.
Use proper CPPFLAGS for the code using KISS FFT:
float: -Dkiss_fft_scalar=float
double: -Dkiss_fft_scalar=double
int16: -DFIXED_POINT=16
int32: -DFIXED_POINT=32