nvvar:CMAKE_GENERATOR_INSTANCE" title="CMAKE_GENERATOR_INSTANCE"><code class="xref cmake cmake-envvar docutils literal notranslate"><span class="pre">CMAKE_GENERATOR_INSTANCE</span></code></a> environment variable), or after a default
instance is chosen when a build tree is first configured, the value will be
available in this variable.</p>
<p>The value of this variable should never be modified by project code.
A toolchain file specified by the <span class="target" id="index-0-variable:CMAKE_TOOLCHAIN_FILE"