Hi
It seems your CP2K executable does not include the FFTW library. Check, if your CP2K executable was compiled with the –D__FFTW flag.
Matthias
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Hi
The arch file does not include the flag –D__FFTW and thus that lib is not available. Just use the default FFT lib FFTSG which is part of the CP2K code.
You may select the FFTSG as the preferred FFT lib (see https://manual.cp2k.org/trunk/CP2K_INPUT/GLOBAL.html#PREFERRED_FFT_LIBRARY) to get rid of the warning.
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Hi
no clue how to fix that, since I am not using Cygwin. I can only suggest to build CP2K on a system running a Linux OS.
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