+* The expert case
+-----------------
+
+If you want to do some more serious cross-platform programming
+with wxWindows, such as for GTK and Motif, you can now build
+two complete libraries and use them concurretly. For this end,
+you have to create a directory for each build of wxWindows -
+you may also want to create different versions of wxWindows
+and test them concurrently. Most typically, this would be a
+version configured with --enable-debug_flag and one without.
+Note, that only one build can currenty be installed, so you'd
+have to use local version of the library for that purpose.
+For building three version, one GTK, one Motif and a debug
+version of the GTK source, you'd do this:
+
+md buildmotif
+cd buildmotif
+../configure --with-motif
+make
+cd ..
+
+md buildgtk
+cd buildgtk
+../configure --with-gtk
+make
+cd ..
+
+md buildgtkd
+cd buildgtkd
+../configure --with-gtk --enable-debug
+make
+cd ..
+