Appreciate advice on %if %foo || %bar syntax

[Patrick <rpm-list puzzled xs4all nl>]

Hi all,

I have a spec file which tests for various distro's:

%define is_fc45 %(test -f /etc/fedora-release && cat /etc/fedora-release | egrep -q '4|5' && echo 1 || echo 0)
%define is_fc6 %(test -f /etc/fedora-release && grep -c Zod /etc/fedora-release || echo 0)
%define is_f7 %(test -f /etc/fedora-release && grep -c Moonshine /etc/fedora-release || echo 0)
%define is_rhel4 %(test -f /etc/redhat-release && cat /etc/redhat-release | egrep -q 'release 4' && echo 1 || echo 0)
%define is_rhel5 %(test -f /etc/redhat-release && cat /etc/redhat-release | egrep -q 'release 5' && echo 1 || echo 0)

Now I would like to use something like this:

%if %is_fc6 || %is_f7 || %is_rhel5
..do something
%endif

I tried this on a laptop with Fedora 7 but it did not work. Does anyone
know if it is possible to use an "OR" here and how?

Thanks and regards,
Patrick