This expect update (version 5.45.4) provides new expect library named libexpect5.45.4.so
along with other files which includes development header files as well.
It also provides older library "libexpect5.42.so" so that the existing applications
linking to the older library should not get broken. Users are recommended to link their
new applications or want to recompile the existing applications to 
link to libexpect5.45.4.so(-lexpect5.45.4).