Help: Clarify EXCLUDE_FROM_DEFAULT_BUILD behavior

Note that solution build configurations ignore dependencies, unlike
the ALL_BUILD target.

Fixes: #12379

Help/prop_tgt/EXCLUDE_FROM_ALL.rst

@@ -26,3 +26,12 @@ the :manual:`cmake-generator-expressions(7)` manual for available expressions.
 Only the "Ninja Multi-Config" generator supports a property value that varies by
 configuration.  For all other generators the value of this property must be the
 same for all configurations.
+
+See Also
+^^^^^^^^
+
+* To exclude targets from the whole directory subtree, see the
+  :prop_dir:`EXCLUDE_FROM_ALL` directory property.
+
+* To exclude targets from the Visual Studio solution build, use
+  :prop_tgt:`EXCLUDE_FROM_DEFAULT_BUILD`.

Help/prop_tgt/EXCLUDE_FROM_DEFAULT_BUILD.rst

@@ -1,8 +1,18 @@
 EXCLUDE_FROM_DEFAULT_BUILD
 --------------------------
 
-Exclude target from ``Build Solution``.
+Exclude a target from the solution build configuration.
 
-This property is only used by Visual Studio generators.
-When set to ``TRUE``, the target will not be built when you press
-``Build Solution``.
+This property is only used by Visual Studio generators. When set to ``TRUE``,
+the target will be excluded from the build when the "Build Solution" command
+is run.
+
+This property has a per-configuration version:
+:prop_tgt:`EXCLUDE_FROM_DEFAULT_BUILD_<CONFIG>`.
+
+.. note::
+  Solution build configurations do not take project dependencies into account.
+  If a target is excluded, it will not be built, even if another target
+  included in the configuration depends on it. This behavior differs from the
+  CMake-generated ``ALL_BUILD`` target and the :prop_tgt:`EXCLUDE_FROM_ALL`
+  property.