[CMake] few solutions with cmake

[Anton Sibilev]

Hello! One more question.. For example I have such structure:

folder:base
....CMakeLists.txt (with PROJECT(someproject))
....folder:lib1
........CMakeLists.txt
....folder:lib2
........CMakeLists.txt
....folder:app
........CMakeLists.txt

and result is someproject.sln with 3 projects lib1, lib2, app. 'app'
depends on 'lib2'. I want to make additional solution for 'app' and
its dependencies (lib2), without lib1.
Can I make somehow 2 solutions?