Help: Add missing PCH_WARN_INVALID docs and related cleanups
diff --git a/Help/manual/cmake-properties.7.rst b/Help/manual/cmake-properties.7.rst
index 7f7ed50..30b2a05 100644
--- a/Help/manual/cmake-properties.7.rst
+++ b/Help/manual/cmake-properties.7.rst
@@ -128,7 +128,6 @@
/prop_tgt/ARCHIVE_OUTPUT_DIRECTORY
/prop_tgt/ARCHIVE_OUTPUT_NAME_CONFIG
/prop_tgt/ARCHIVE_OUTPUT_NAME
- /prop_tgt/PCH_WARN_INVALID
/prop_tgt/AUTOGEN_BUILD_DIR
/prop_tgt/AUTOGEN_ORIGIN_DEPENDS
/prop_tgt/AUTOGEN_PARALLEL
@@ -312,6 +311,7 @@
/prop_tgt/OSX_ARCHITECTURES
/prop_tgt/OUTPUT_NAME_CONFIG
/prop_tgt/OUTPUT_NAME
+ /prop_tgt/PCH_WARN_INVALID
/prop_tgt/PDB_NAME_CONFIG
/prop_tgt/PDB_NAME
/prop_tgt/PDB_OUTPUT_DIRECTORY_CONFIG
diff --git a/Help/prop_tgt/PCH_WARN_INVALID.rst b/Help/prop_tgt/PCH_WARN_INVALID.rst
index 36ec348..96e1abd 100644
--- a/Help/prop_tgt/PCH_WARN_INVALID.rst
+++ b/Help/prop_tgt/PCH_WARN_INVALID.rst
@@ -2,7 +2,9 @@
----------------
When this property is set to true, the precompile header compiler options
-will contain a compiler flag wich should warn about invalid precompiled
+will contain a compiler flag which should warn about invalid precompiled
headers e.g. ``-Winvalid-pch`` for GNU compiler.
-The defalut value is ``ON``.
+This property is initialized by the value of the
+:variable:`CMAKE_PCH_WARN_INVALID` variable if it is set when a target is
+created. If that variable is not set, the property defaults to ``ON``.
diff --git a/Help/release/3.18.rst b/Help/release/3.18.rst
index 2efef88..d72454f 100644
--- a/Help/release/3.18.rst
+++ b/Help/release/3.18.rst
@@ -117,6 +117,9 @@
* The :prop_sf:`OBJECT_OUTPUTS` source file property now supports
:manual:`generator expressions <cmake-generator-expressions(7)>`.
+* The :prop_tgt:`PCH_WARN_INVALID` target property was added to allow the
+ removal of the precompiled header invalid warning.
+
* The :prop_tgt:`UNITY_BUILD_MODE` target property was added to tell
generators which algorithm to use for grouping included source
files.
