I would like an Xorg to use the clipboard instead of primary selection
when copying text with mouse.
Is it possible to configure X globally
or each application requires its own clipboard configuration ?

The most important for me is to force xterm to use clipboard by
I mostly use the following X applications:
xpdf, xchm, oowriter, wine, firefox.

Is there a generic way to configure them to use clipboard by
default ?

I'm aware of xclipboard, klipper and glipper tools but I don't want to
use any intermediate tool.

thank You for help