#!/bin/bash

tmp="$(mktemp tmp.XXX)"
for rel in alt1.10 alt1.p3 alt1.9 alt1.10.1 alt1.svn20090812 alt1.svn20090812.10 alt1.svn20090812.11; do
  echo -n "$rel: "
  :>"$tmp"
  for br in "" M50 M41 M40; do
    rpm --define "branch_switch \"$br\"" --eval "%branch_release $rel" >>"$tmp"
  done
  sort "$tmp" | sed ':a;N;s/\n/ /;ta'
done
rm -f "$tmp"