></span><a class="reference internal" href="CMAKE_TOOLCHAIN_FILE.html#variable:CMAKE_TOOLCHAIN_FILE" title="CMAKE_TOOLCHAIN_FILE"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_TOOLCHAIN_FILE</span></code></a>
variable may initialize <code class="docutils literal notranslate"><span class="pre">CMAKE_GENERATOR_INSTANCE</span></code> as a cache entry.
Once a given build tree has been initialized with a particular value
for this variable, changing the value has und