+<div class="doc_subsubsection">
+ <a name="cl::ParseEnvironmentOptions">The <tt>cl::ParseEnvironmentOptions</tt>
+ function</a>
+</div>
+
+<div class="doc_text">
+
+<p>The <tt>cl::ParseEnvironmentOptions</tt> function has mostly the same effects
+as <a
+href="#cl::ParseCommandLineOptions"><tt>cl::ParseCommandLineOptions</tt></a>,
+except that it is designed to take values for options from an environment
+variable, for those cases in which reading the command line is not convenient or
+not desired. It fills in the values of all the command line option variables
+just like <a
+href="#cl::ParseCommandLineOptions"><tt>cl::ParseCommandLineOptions</tt></a>
+does.</p>
+
+<p>It takes three parameters: first, the name of the program (since
+<tt>argv</tt> may not be available, it can't just look in <tt>argv[0]</tt>),
+second, the name of the environment variable to examine, and third, the optional
+<a href="#description">additional extra text</a> to emit when the
+<tt>--help</tt> option is invoked.</p>