<p></p>
<p>Found it:</p>
<blockquote>
<p>Any target in the makefile may be specified as a goal (unless it starts with ‘-’ or contains an ‘=’, in which case it will be parsed as a switch or variable definition, respectively).<br>
-- <a href="https://www.gnu.org/software/make/manual/make.html#Goals" rel="nofollow">https://www.gnu.org/software/make/manual/make.html#Goals</a></p>
</blockquote>
<p>I make my living on exactly this kind of minutia, but IMHO, one parenthetical clause in the <code>make</code> manual is too little reason to flout the principle of least surprise.</p>

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