\twocolitem{wxUSE\_BASE}{only used by wxWidgets internally (defined as $1$ when
building wxBase code, either as a standalone library or as part of the
monolithic wxWidgets library, defined as $0$ when building GUI library only)}
+\twocolitem{wxNO\_RTTI}{is defined if the compiler RTTI support has been switched off}
+\twocolitem{wxNO\_EXCEPTIONS}{is defined if the compiler support for C++
+exceptions has been switched off}
+\twocolitem{wxNO\_THREADS}{if this macro is defined, the compilation options
+don't include compiler flags needed for multithreaded code generation. This
+implies that wxUSE\_THREADS is $0$ and also that other (non wx-based) threading
+packages cannot be used neither.}
\end{twocollist}