Pass arguments at compile time

[Malte]

I want to import a config file at compile time, but also need a 
way to have multiple configurations.

With gcc you could do something like 
-DIMPORTFROM='"MyConfigFile.txt"'. Is there any equivalent in D?

Hardcoding the config files for different versions and using that 
is not an option. Requiring a fixed filename and using different 
paths to configure with -J wouldn't be a good solution for my 
specific situation either.

So far my best idea was to write the wanted filename to a file 
and import twice.
enum config = import(import("importFrom.txt"));

That works, but that is additional work for the build script and 
feels like a hack.