dh machinery and module how to export only given symbol

[Jerome BENOIT <calculus@rezozer.net>]

Hello:

I have  to build a module that exports only symbol with a given prefix:
in the pre-dh debian/rules , something as

	CFLAGS="$(cflags) -Wl,--version-script,debian/<PACAKAGENAME>.version"

was use. I cannot figure out how to proceed within the dh machinery.

Any hint is welcome.

Thanks in advance,
Jerome