If the `dep` is a two char string (as "qt"), the `platform, name = dep`
will split the string and search for 't' dependency in 'q' platform.
So, we have to be sure that the dep is a tuple before splitting it.
This is the big change !!!!
Instead of handling target as primary object and prepare/build targets,
we are handling build steps.
A build step may be a source (preparation) or a build (of the source).
Actualy, a step is a tuple (context, Builder or Source).
The context define the context of the step. It can be :
- 'source', for a Source step
- 'neutral' or the name of a platform for Build step.
Target becomes a "Class only" class.
Matthieu Gautier