+ *
+ * Rational of XBT_PUBLIC_NO_IMPORT:
+ * * This is for symbols which must be exported in the DLL, but not imported from it.
+ * This is obviously useful for initialized globals (which cannot be extern or similar).
+ * This is also used in the log mecanism where a macro creates the variable automatically.
+ * When the macro is called from within SimGrid, the symbol must be exported, but when called
+ * from within the client code, it must not try to retrieve the symbol from the DLL since it's not in there.