<code>--enable-concept-checks</code>. When defined, performs
compile-time checking on certain template instantiations to
detect violations of the requirements of the standard. This
- is described in more detail in
+ macro has no effect for freestanding implementations.
+ This is described in more detail in
<link linkend="manual.ext.compile_checks">Compile Time Checks</link>.
</para>
</listitem></varlistentry>