[CMake] How to get CurrentTag

[Baptiste Derongs]

Hello all,

After the run of ctest I need to access (by a script) to the Xml files
in ${CTEST_BINARY_DIR}/Testing/<Tag>, where tag is by default the
timestamp of the test.
Is there any solution to set this tag or to get its value in CTest ?
My script is based on the stable version of Ctest, where there is no
Tag by default, but there is always one in Cvs version...

Regards

Baptiste