Passing conditional parameters into a rpm build

["Keith G. Robertson-Turner" <redhat-forums genesis-x nildram co uk>]

Just hit a small snag building a package:

%install
.... snip ....
# FIXME: how to combine [!?_without_gtk OR ?_with_qt] into a single test?
%{!?_without_gtk:install -D -p -m 644 %{SOURCE3} $RPM_BUILD_ROOT%{_datadir}/pixmaps/nvclock.xpm}
%{?_with_qt:install -D -p -m 644 %{SOURCE3} $RPM_BUILD_ROOT%{_datadir}/pixmaps/nvclock.xpm}

and also:

%files
.... snip ....
# FIXME: how to combine [!?_without_gtk OR ?_with_qt] into a single test?
%{!?_without_gtk:%{_datadir}/pixmaps/nvclock.xpm}
%{?_with_qt:%{_datadir}/pixmaps/nvclock.xpm}

I've read the "conditionalbuilds" rpm doc, which gives the example:

# Read: If neither macro exists, then add the default definition.
%{!?_with_ldap: %{!?_without_ldap: %define _without_ldap --without-ldap}}

But that's the equivalent of an [X AND Y], whereas I need a [X OR Y].

Specifically, [IF either X OR Y are TRUE, THEN install the file nvclock.xpm]

How?

TIA.

-
K.