By the end of the configuration, cmake reports whether ns-3 was found,
and this information is also available in <tt>include/simgrid_config.h</tt>
-If your local copy defines the variable \c HAVE_NS3 to 1, then NS3
+If your local copy defines the variable \c SIMGRID_HAVE_NS3 to 1, then NS3
was correctly detected. If it's defined to 0, then something went
wrong. Explore <tt>CMakeFiles/CMakeOutput.log</tt> and
<tt>CMakeFiles/CMakeError.log</tt> to diagnose the problem.
