er_status.cpp</a></li>
</ul>
<h2><a name="Implementation">Implementation</a></h2>
<p>The current implementation supports operating systems which provide 
the POSIX or Windows API's.</p>
<p>The library is in regular use on Apple  OS X, HP-UX, IBM AIX, Linux, 
Microsoft Windows, SGI IRIX, and Sun Solaris operating systems using a variety 
of compilers.</p>
<h2><a name="Macros">Macros</a></h2>
<p>Users may defined the following macros if desired. Sensible defaults are 
provided, so users can ignore these macro