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fft support on octave

From: niraj pandey
Subject: fft support on octave
Date: Fri, 13 Dec 2019 11:44:36 +0530

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. 

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