sp;<span class="keyword">val</span>&nbsp;interactive&nbsp;:&nbsp;bool&nbsp;<span class="constructor">Stdlib</span>.ref<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;os_type&nbsp;:&nbsp;string<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;backend_type&nbsp;=&nbsp;<span class="constructor">Native</span>&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Bytecode</span>&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">Other</span>&nbsp;<span class="key