title: Is there a logical OR operator for the 'ifneq'?
body: <p>Is there a logical OR operator for the 'ifneq ... endif' statement?</p>
  
  <p>That is, I'd not like to execute some statements if variable 'var1' or 'var2' is defined. Something like this:</p>
  
  <pre><code>ifneq ($(WNDAP660),y) OR $(WNADAP620),y))
  ...
  endif
  </code></pre>
  
  <p>I've tried ifneq <code>($(WNDAP660),$(filter $(WNADAP620),y y))</code>, but it is not working.</p>