Hi, Enrico
Please share the link you've found :-)
Here is similar problem in postgress and some explanations http://archives.postgresql.org/pgsql-cygwin/2003-11/msg00024.php Also from reply adressed to you (?) http://permalink.gmane.org/gmane.comp.java.classpath.devel/7260 See last paragraph.And set of links on th same problem with dlopen on cygwin from Felix which may be usefull
http://pnkfif.blogspot.com/2005/05/dlopen-on-win32.html