Compiler Portgroup ...

[Ryan Schmidt]

On Feb 26, 2014, at 13:46, Sean Farley <sean at macports.org> wrote:

> The important part that I didn't really document is that compilers.setup
> has to be the last call.

If that’s so, just make the portgroup error out if the calls are not in the right order.

> In all the examples, I have compilers/mpi calls
> after the PortGroup but before everything else and also with the setup
> call last.
> 
> I think you'll get the desired outcome if you change the order to:
> --- snip ---
> PortSystem          1.0
> PortGroup           python 1.0
> PortGroup           github 1.0
> PortGroup           compilers 1.0
> 
> compilers.choose    f77 f90 fc
> compilers.setup     require_fortran
> 
> github.setup        obspy obspy 4d67519
> --- snip ---
> 
> If this were Python, I could make lazily evaluated properties for this
> but, unfortunately, this is not Python and my Tcl is pretty mediocre.

Tcl also has lazily-evaluated properties; we use them all over the place in MacPorts.