running configure, build, and destroot phases twice in a single port?

[Joshua Root]

On 2010-2-14 14:21 , Adam Mercer wrote:
> Hi
> 
> I'd like to revisit an old issue and see how the fftw-3 and
> fftw-3-single ports can be merged into a single port (and also for
> fftw and fftw-single). There are several software packages that
> require that both the single and double precision builds of the
> library need to be available at the same time so using a variant is
> not an option. Therefore the merged port would need to run the
> configure, build, and destroot phases twice (with slightly different
> configuration options).
> 
> Is there an existing port that does this? Or does anyone know of a way
> this can be done?

Can the single- and double-precision ports be made to install in a
non-conflicting manner?

- Josh