check_version

Checks that the Tracker library in use is compatible with the given version.

Generally you would pass in the constants [const@MAJOR_VERSION], [const@MINOR_VERSION], [const@MICRO_VERSION] as the three arguments to this function; that produces a check that the library in use is compatible with the version of Tracker the application or module was compiled against.

Compatibility is defined by two things: first the version of the running library is newer than the version required_major. required_minor.required_micro. Second the running library must be binary compatible with the version required_major.required_minor.required_micro (same major version.)

Parameters:

required_major	the required major version.
required_minor	the required minor version.
required_micro	the required micro version.

Returns:

null if the Tracker library is compatible with the given version, or a string describing the version mismatch.