FFTW Library Detection

[Dan Whitehouse]

I am having a real struggle building Relion3 for our HPC cluster. Due to the way that Relion3 builds its own fftw I think I'll need to build with ours. However it isnt being detected. What environment variables does Relion3 use to try and detect FFTW?

[Frank Vago]

Hi Dan,

In order to detect FFTW, the following environment variables should be set:

export FFTW_INCLUDE=/path/to/fftw/include

export FFTW_LIB=/path/to/fftw/lib

In the RELION /cmake/FindFFTW.cmake script file, it looks for the $FFTW_INCLUDE and $FFTW_LIB environment variables. Setting these variables always worked for me when I build RELION on clusters.

Hope this helps!

Regards,

Frank Vago

[Dan Whitehouse]

That helped enormously, now to try and sort out FLTK! (Fortunately that makes its requirements a bit more explicit).

[Dan Whitehouse]

Thanks to Franks excellent advice I've now managed to teach cmake where my fftw is!