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<a name="feupdateenv_002d_002d_002dupdate-current-floating_002dpoint-environment"></a>
<h3 class="section">3.11 <code>feupdateenv</code>&mdash;update current floating-point environment</h3>
<a name="index-feupdateenv"></a>
<p><strong>Synopsis</strong>
</p><div class="example">
<pre class="example">#include &lt;fenv.h&gt;
int feupdateenv(const fenv_t *<var>envp</var>);

Link with -lm.

</pre></div>
<p><strong>Description</strong><br>
This method attempts to save the currently raised floating point
exceptions in its automatic storage, install the floating point
environment specified by <var>envp</var>, and raise the saved floating
point exceptions.
</p>
<p>The argument <var>envp</var> must point to a floating-point environment
obtained via <code>fegetenv</code> or <code>feholdexcept</code>.
</p>
<br>
<p><strong>Returns</strong><br>
If all actions are completed successfully, then this method returns zero.
Otherwise, a non-zero value is returned.
</p>
<br>
<p><strong>Portability</strong><br>
ANSI C requires <code>feupdateenv</code>.
</p>
<p>Not all Newlib targets have a working implementation.  Refer to
the file <code>sys/fenv.h</code> to see the status for your target.
</p>
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