Best practices to manage versions with scons?

I would like my Qt/C++ application to know which version it is. It should know that not from some configuration files, but with version number compiled into application binary. A version itself is string like "X.Y.Z", where X is a major version number, Y is a minor version number and Z is a revision under SVN (or a revision number under SVN minus a revision number when version "X.Y.0" came out). What would you think is the simplest way to accomplish this with scons?