Sometime, you don’t find the .so file that you need. In this case you must search for it’s source codes and try to comile it. To have this option, you must have httpd-devel / apache-devel installed on your Linux machine.
apxs2 -c -I/usr/include/libxml2 -i mod_line_edit.c
This will complile mod_line_edit.so
Cheers,