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FFTW Home Page. Configure problem with fftw. 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).

configure problem with fftw

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 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.

[gmx-users] Installation problem:fftw3f lib. not found. Fast Fourier Transform. (Discrete Fourier Transform) (Fast Fourier Transform) Written by Paul Bourke.