fftw-dev software package provides library for computing Fast Fourier Transforms, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install fftw-dev
fftw-dev is installed in your system.
Make ensure the fftw-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep fftw-dev *
You will get with fftw-dev package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Old Libraries |
| Package | fftw-dev |
| Version | 2.1.5-1+b1 [armel, armhf, mips |
| Description | library for computing Fast Fourier Transforms |
| Sub Section | oldlibs |
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