[gmx-users] fftw without SIMD

Mark Abraham mark.j.abraham at gmail.com
Mon Jun 10 07:01:44 CEST 2013

You may have compiled one like that (AFAIK those CFLAGS won't help), but
CMake *finding* that one once installed can be another matter (e.g. use
CMAKE_PREFIX_PATH per install instructions). You can see which fftw was
found with "grep FFTWF_LIBRARY CMakeCache.txt" from the build directory -
or pay close attention to the output from the initial cmake.


On Mon, Jun 10, 2013 at 1:34 AM, francesco oteri
<francesco.oteri at gmail.com>wrote:

> Dear gromacs users,
> I am compiling gromacs 4.6.1, but when I configure the package ccmake
> says:
> The fftw library found is compiled without SIMD support, which makes it
> although I compiled fftw
> ./configure --enable-single --enable-shared --enable-sse2 CC=icc F77=ifort
> CFLAGS=-msse4.1
> Is it a known issue or I did something wrong?
> Francesco
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