Help: Add `.. versionadded` directives to generator docs

More `.. versionadded` could be added later when the features,
variables and properties relevant to each generator are properly
documented.

Issue: #19715

1 files changed, 35 insertions, 10 deletions

diff --git a/Help/generator/Ninja.rst b/Help/generator/Ninja.rst
index 08ee81b..f3ba222 100644
--- a/Help/generator/Ninja.rst
+++ b/Help/generator/Ninja.rst
@@ -11,32 +11,57 @@ For each subdirectory ``sub/dir`` of the project, additional targets
 are generated:
 
 ``sub/dir/all``
-  Depends on all targets required by the subdirectory.
+
+  .. versionadded:: 3.6
+
+    Depends on all targets required by the subdirectory.
 
 ``sub/dir/install``
-  Runs the install step in the subdirectory, if any.
+
+  .. versionadded:: 3.7
+
+    Runs the install step in the subdirectory, if any.
 
 ``sub/dir/install/strip``
-  Runs the install step in the subdirectory followed by a ``CMAKE_STRIP`` command,
-  if any.
 
-  The ``CMAKE_STRIP`` variable will contain the platform's ``strip`` utility, which
-  removes symbols information from generated binaries.
+  .. versionadded:: 3.7
+    Runs the install step in the subdirectory followed by a ``CMAKE_STRIP`` command,
+    if any.
+
+    The ``CMAKE_STRIP`` variable will contain the platform's ``strip`` utility, which
+    removes symbols information from generated binaries.
 
 ``sub/dir/test``
-  Runs the test step in the subdirectory, if any.
+
+  .. versionadded:: 3.7
+
+    Runs the test step in the subdirectory, if any.
 
 ``sub/dir/package``
-  Runs the package step in the subdirectory, if any.
+
+  .. versionadded:: 3.7
+
+    Runs the package step in the subdirectory, if any.
 
 Fortran Support
 ^^^^^^^^^^^^^^^
 
+.. versionadded:: 3.7
+
 The ``Ninja`` generator conditionally supports Fortran when the ``ninja``
 tool is at least version 1.10 (which has the required features).
 
+Swift Support
+^^^^^^^^^^^^^
+
+.. versionadded:: 3.15
+
+The Swift support is experimental, not considered stable, and may change
+in future releases of CMake.
+
 See Also
 ^^^^^^^^
 
-The :generator:`Ninja Multi-Config` generator is similar to the ``Ninja``
-generator, but generates multiple configurations at once.
+.. versionadded:: 3.17
+  The :generator:`Ninja Multi-Config` generator is similar to the ``Ninja``
+  generator, but generates multiple configurations at once.