How to keep unix eoln in repository

[juhas]

Hi,
is there any simple way how to keep unix ends of lines (eolns) in
the repository?
Despite the fact that our compile & link platform is UNIX, some
of our developers edit source files on windows. And they always
forget to change win eolns to unix eolns...
Is it possible to set/write a trigger which would convert eolns
in text files during cvs checkin?
If not, is there another chance?
Thanks a lot,
Dusan Juhas