Introduction FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data (as well as of even/odd data, i.e. the discrete cosine/sine transforms or DCT/DST). We believe that FFTW, which is free software, should become the FFT library of choice for most applications. The latest official release of FFTW is version 3.3.3, available from our download page. Version 3.3 introduced support for the AVX x86 extensions, a distributed-memory implementation on top of MPI, and a Fortran 2003 API. Version 3.3.1 introduced support for the ARM Neon extensions.
Well, I *really* never use CFLAGS, but CPPFLAGS instead (which basically hase the same effect; I just did not remember that very moment, and unfortunately only tested configure, not make). But anyway, we addressed that problem already in an earlier thread and there I proposed to write a patch, if I find the time. Needless to say, I didn't find it. However, this morning I took it and changed configure.ac to be more portable and use standard autotools macros. As pkg-config is known to be the tool of choice for additional packages, the patch uses it to check for FFTW and PLPlot. It uses PLPlot by default and complains if it is not present, but you can switch it of by specifying the option --without-plplot to configure. configure problem with fftw
[gmx-users] Installation problem:fftw3f lib. not found.
(Discrete Fourier Transform) (Fast Fourier Transform) Written by Paul Bourke Fast Fourier Transform