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Re: fft support on octave

From: Kai Torben Ohlhus
Subject: Re: fft support on octave
Date: Fri, 13 Dec 2019 15:44:46 +0900
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1

Dear Niraj,

Still I do not understand why you deploy libraries in the "/tmp"
directory, which is on usual Linux system a volatile TeMPorary
directory.  Can't you use your user's /home/niraj directory for all
libraries instead?  This might be one root of trouble.

Can you describe, how you installed the FFTW3 library on your system?


On 12/13/19 3:14 PM, niraj pandey wrote:
> Hi ,
> Could you pls help me how to build octave with fft support. I used the
> following command to build octave but still getting issue.
> octave:1> fft(0:255)
> error: fft: support for FFTW was unavailable or disabled when liboctave
> was built  
> ./configure --prefix=/home/niraj/oc CFLAGS=-fPIC CXXFLAGS=-fPIC
> --enable-shared --with-gui --with-qt
> --with-blas=/v5.1.0/BLAS-3.8.0/blas_LINUX.a
> --with-lapack=/v5.1.0/lapack-3.8.0/liblapack.a --enable-float
> --enable-sse --with-fftw3-includedir=/tmp/fftw/include/
> --with-fftw3-libdir=/tmp/fftw/lib
> Config.log says:   configure:69014: WARNING: FFTW3 library not found. 
> The slower FFTPACK library will be used instead. 
> Thanks
> Niraj
> Success occurs when opportunity and preparation meet

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