Fortran compiler variants for fftw-single

[ryusuke.numata@…]

Same suggestion as for fftw (#22458)

I propose to allow users to choose fortran compilers. I added +g95 +gcc43 +gcc42 instead of +fortran. If any of fortran is chosen, a fortran include file is also installed.

I also sugget to add --enable-mpi and --enable-shared options.

[snc@…]

What are the differences between this and the regular fftw port? I see you're combining the distfiles but can they be combined all together?

Do they manage to not conflict if they're both installed?

[snc@…]

Cc Me!

[ryusuke.numata@…]

fftw-single port just adds the '--enable-float' configure option to generate the library for single-precision data. It is possible to install both fftw and fftw-single without conflict. I just wanted to include the same enhancement as the fftw port, and dit not try to change its original structure.

It may be possible to merge this port into fftw as a variant.

[snc@…]

I would like to merge them. :) Anyone have any reservations?

[ryandesign@…]

Replying to snc@…:

I would like to merge them. :) Anyone have any reservations?

Yes. First, this ticket is for the request to add compiler variants. If you would like to consider merging the two ports, that's a separate ticket, please. Second,  I had the same question 2.5 years ago about fftw-3 and fftw-3-single. It seems the purpose is that both can be installed at the same time, thus a variant would not be appropriate. If a single port can be made to install both single- and double-precision versions simultaneously, go for it, but I figured it would be difficult. Whatever you decide on that should apply equally to fftw/fftw-single and fftw-3/fftw-3-single so you should coordinate with the maintainer of those ports.

[ram@…]

Cc Me!

[ram@…]

I would like to merge fftw-3 and fftw-3-single into a single port but am unsure of the best way to run the configure, build, and destroot phases twice with different configure options...

[ryandesign@…]

Can we make a separate ticket for that discussion? This ticket is for adding compiler variants.

[jmr@…]

r75544