<p>On glibc dist <code>T_OPT</code> macro defined inside <code>/usr/include/arpa/nameser_compat.h</code> file and looks as</p>
<pre><code>#define T_OPT ns_t_opt
</code></pre>
<p>Inside Alpine dist also exist file <code>/usr/include/arpa/nameser_compat.h</code> but content of this file</p>
<pre><code>/usr/include # cat /usr/include/arpa/nameser_compat.h
#include <arpa/nameser.h>

/usr/include #
</code></pre>
<p>Is need use <code>nameser_compat.h</code> file?</p>

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