Rebuild ROOT on Windows 10 to get FFTW

ROOT Version: root_v5.34.38
Platform: Windows 10
Compiler: Not Provided


I’m trying to run FFT.C code in ROOT but “FFTW error” appears on the screen. I’ve already put the folder of the fftw3.lib in the PATH and I created the lib /libfftw3-3.def file with DVS. What am I missing or what can I do?

I read that I have to rebuild ROOT but I don’t know how to do it on Windows.

The issue of all this stuff is that I need to create a script for signal analysis but without FFTW working it is so difficult or impossible I guess.



do you encounter the same issue with ROOT 6.16?



You have to add the location of libfftw3-3.dll in your PATH

Cheers, Bertrand.

Hi Danilo

Root 6.16 does not work in my laptop. I don’t know why.

Hi bellenot
You mean like that?
Doesn’t work.

Sorry, I overlooked the binaries… ROOT 5.34.38 doesn’t contain libFFTW. You’ll have to build ROOT from source yourself, or use ROOT 6.16.00.

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