[CMake] add_dependencies with an imported target

[Joachim de Vries]

CMake version 2.7-20080708

Mac OSX 10.5
XCode 3.0

I have a problem with add_dependencies.

If I add an imported static lib like this:
add_library("mylib" STATIC IMPORTED)

and try to add a dependency to this target on another target like this:

add_dependencies(myapp "mylib")

I get the following error:
CMake Error: Unknown Target referenced : mylib
CMake Error: Target: myapp depends on unknown target: mylib

Is it not possible to add imported targets to dependency list?

Regards
Joachim de Vries