Help: State in add_library that INTERFACE libraries have no build targets
diff --git a/Help/command/add_library.rst b/Help/command/add_library.rst
index 2615db9..ed8447e 100644
--- a/Help/command/add_library.rst
+++ b/Help/command/add_library.rst
@@ -100,11 +100,12 @@
add_library(<name> INTERFACE)
-Creates an :ref:`Interface Library <Interface Libraries>`. An ``INTERFACE``
-library target does not directly create build output, though it may
-have properties set on it and it may be installed, exported and
-imported. Typically the ``INTERFACE_*`` properties are populated on
-the interface target using the commands:
+Creates an :ref:`Interface Library <Interface Libraries>`.
+An ``INTERFACE`` library target does not compile sources and does
+not produce a library artifact on disk. However, it may have
+properties set on it and it may be installed and exported.
+Typically, ``INTERFACE_*`` properties are populated on an interface
+target using the commands:
* :command:`set_property`,
* :command:`target_link_libraries(INTERFACE)`,
@@ -117,6 +118,9 @@
and then it is used as an argument to :command:`target_link_libraries`
like any other target.
+An interface library has no source files itself and is not included
+as a target in the generated buildsystem.
+
Imported Libraries
^^^^^^^^^^^^^^^^^^
