When the source is available, then of course everything can be compiled in one nice executable. ;) I am referring to cases where the source is not available or

When the source is available, then of course everything can be compiled in one nice executable. ;) I am referring to cases where the source is not available or its hard to set up some projects together. Some projects (usually hardware related) require different compilers, compile options, etc. If the project already has the binaries, then for distribution maybe a wrapper could be a good option.