[gmx-users] Installing Gromacs 4.6.3 using Cygwin

[Mirco Wahab]

On 11.12.2013 17:48, chem grad wrote:
> I am new to both Cygwin and Gromacs, so I apologize in advance if this error
> is do to my computing ignorance. I downloaded the gromacs-4.6.3.tar.gz file
> and tried to follow the 'Quick and Dirty Installation Instructions' to
> install Gromacs 4.6.3 on my new Windows 8 machine, but encountered a couple
> snags.
>...
> src/gmxlib/CMakeFiles/gmx.dir/nonbonded/nb_kernel_avx_256_single/nb_kernel_ElecRF_VdwNone_GeomW4W4_avx_256_single.c.o
> make[2]: *** No rule to make target
> '//cygdrive/c/Cygwin/home/kelly/Gromacs/gromacs-4.6.3/build/src/contrib/fftw/gmxfftw-prefix/lib/libfftw3f.a',
> needed by 'src/gmxlib/cyggmx-8.dll'.  Stop.

Simple answer: use the fftw3-3.3.3 that comes with your
cygwin/64-distribution. Gromacs will find and use it.
The performance of this fftw3 (it lacks SSE2) should be
close to the one you'd compile for yourself on the machine
(I tested both).

Otherwise: download and compile fftw3 in cygwin and use
this local build for Gromacs. GMX_BUILD_OWN_FFTW doesn't
seem to work for now in cygwin.

If you are interested, I could provide detailed instructions
for both fftw3 and Gromacs on cygwin/64.

Regards

M.