<p><code>List of <a href="../build-ref.html#labels">labels</a>; optional</code></p>

<p>
The set of
<a href="../toolchains.html">toolchains</a>
this rule has access to.
</p>

</p>Targets listed here are the set of toolchains whose <a href="${link make-variables}">Make
variables</a> the rule is allowed to access.</a> These rules are either rules that provide
the <code>TemplateVariableInfo</code> provider or special targets for toolchain types built into
Bazel. These include:

<ul>
    <li><code>@bazel_tools//tools/cpp:current_cc_toolchain</code>
  <li><code>@bazel_tools//tools/cpp:current_java_runtime</code>
  </ul>