single precision fftw wanted

[Stephen Montgomery-Smith]

Dear Lars and ports,

I am interested in creating a port for gromacs (http://www.gromacs.org) 
and it requires fftw built using single precision.  The super-easy way 
is to create a port sfftw which is a copy of fftw with a line like
CONFIGURE_ARGS+=        --enable-float --enable-type-prefix
added in.  Or I could add some kind of option to fftw.  Anyway, since 
Lars is the maintainer of fftw I would like to coordinate with him about 
it.  And I am copying this to ports as well just in case anyone else has 
suggestions.

Best, Stephen