title: Gnu make, multiple sets of grouped targets
body: <p>I have a makefile that includes two rules each of which defines a (completely different) grouped target. The intention in each case is (of course) to generate all of the targets by executing the associated recipe once.</p>
  <p>If both rules are present, each using the target separator &quot;&amp;:&quot;, I get &quot;warning: overriding recipe for target '&amp;'&quot;, with the first lines of each of the two recipes cited.</p>
  <p>If I change either rule to use the standard target separator &quot;:&quot;, the warning goes away.</p>
  <p>I can provide extracts from the makefile but believe the above description is as concise as it will get.</p>