Setting versions for imports

[Jascha Wetzel]

Derek Parnell wrote:
> The 'Bud' utility has some help for you. It supports a pragma that ensures
> the 'version' gets passed to al files being compiled.
> 
> In any of the files to be compiled you have something like ...
> 
>   version(build) pragma(export_version, asdf);
> 
> and Bud causes "version=asdf" to be placed on the command line for you.
> 
> I'm not sure if Rebuild has a similar functionality, but I wouldn't be
> surprised if it did.

uh, both have this feature. for some reason i didn't bother to check the 
build tools. thanks for that hint.