FFTSG library required for wavelet based Poisson's solver

[JingQiang]

Dear cp2k developers,

I am wondering why does wavelet based Poisson solver requires the usage of 
FFTSG library for calculations? How does it affect the accuracy of our 
results if FFTW3 library is used instead? 

If this imposes a serious issue, can I suggest that the program shall not 
proceed calculation once the FFTSG library is not used? Thank you.

Cheers,
JQ
PhD student, Tampere University of Technology.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cp2k.org/archives/cp2k-user/attachments/20130118/7e375d2e/attachment.htm>