what path are we following? the that specifies that a toolchain contains fftw libs or the one that specifies that toolchains might conatin fftw libs?  this has nothing to do with breaking api  imho, this is a bug discovered after a release and should be fixed. the proper fix could be to rename the old ictce to ictce-no-fft and flag it as deprecated and provide a ictcf or something along those lines.