[gmx-users] fftw & enable-float

[Choon Peng]

Hi Bo Yang,

  I have one suggestion.
I think you need to have "--enable-type-prefix" when you configure
FFTw, ie. have "s" or "d" added before fftw.h for single and
double-precision versions respectively.
Then GROMACS should be able to find sfftw.h or dfftw.h.

cheers,
choon-peng

--
Mr. Choon-Peng CHNG
Research Associate
Computational Biology Group
BioInformatics Institute, BMSI
30 Biopolis Street, #07-01 Matrix, Singapore 138671.
DID: +65 6478 8301; Fax: +65 6478 9047
www.bii.a-star.edu.sg/~cpchng

On Fri, 19 Nov 2004, Bo Yang wrote:

> Yes, I did type './configure --enable-float' for
> 'fftw'. When I check the files, the 'fftw.h' is
> under '---/include/fftw.h'. When I try to configure
> Gromacs, it finds the 'fftw.h', but not 'sfftw.h. Then
> it complains that 'configure: error: Cannot find any
> single precision sfftw.h or fftw.h'. I don't
> understand which part is wrong, 'fftw', or 'Gromacs'.
>
> Please suggest.
>
> Bo
>
> here is how I did:
>
> > [:~/gromacs-3.2.1] bo% ./configure
> > --prefix=/Users/bo/gromacs-3.2.1
> > checking build system type...
> > powerpc-apple-darwin7.6.0
> > checking host system type...
> > powerpc-apple-darwin7.6.0
> > checking for a BSD-compatible install...
> > /usr/bin/install -c
> > ---
> > ----
> > checking for sfftw.h... no
> > checking for fftw.h... yes
> > configure: error: Cannot find any single precision
> > sfftw.h or fftw.h
> >
> > ----end
> >
> >
> >
> >
> > --- Lianqing Zheng <lzheng at me.rochester.edu> wrote:
> >
> > > how about ./configure --enable-float?
> >
> >
>
>
>
>
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