Merge branch 'backport-3.15-fix-EXCLUDE_FROM_ALL-subdir-all'

Resolve conflicts with changes since the 3.15 series:

* Convert `cmSystemTools::IsOn` => `cmIsOn`.
* Move one "EXCLUDE_FROM_ALL" target property logic fix to
  its new location in `cmMakefile::AddNewUtilityTarget`.

4 files changed, 34 insertions, 19 deletions

diff --git a/Help/prop_dir/EXCLUDE_FROM_ALL.rst b/Help/prop_dir/EXCLUDE_FROM_ALL.rst
index 9d3192c..8e3cca0 100644
--- a/Help/prop_dir/EXCLUDE_FROM_ALL.rst
+++ b/Help/prop_dir/EXCLUDE_FROM_ALL.rst
@@ -1,15 +1,13 @@
 EXCLUDE_FROM_ALL
 ----------------
 
-Exclude the directory from the all target of its parent.
+Set this directory property to a true value on a subdirectory to exclude
+its targets from the "all" target of its ancestors.  If excluded, running
+e.g. ``make`` in the parent directory will not build targets the
+subdirectory by default.  This does not affect the "all" target of the
+subdirectory itself.  Running e.g. ``make`` inside the subdirectory will
+still build its targets.
 
-A property on a directory that indicates if its targets are excluded
-from the default build target.  If it is not, then with a Makefile for
-example typing make will cause the targets to be built.  The same
-concept applies to the default build of other generators.
-
-Targets inherit the :prop_tgt:`EXCLUDE_FROM_ALL` property from the directory
-that they are created in. When a directory is excluded, all of its targets will
-have :prop_tgt:`EXCLUDE_FROM_ALL` set to ``TRUE``. After creating such a target
-you can change its :prop_tgt:`EXCLUDE_FROM_ALL` property to ``FALSE``. This
-will cause the target to be included in the default build target.
+If the :prop_tgt:`EXCLUDE_FROM_ALL` target property is set on a target
+then its value determines whether the target is included in the "all"
+target of this directory and its ancestors.
diff --git a/Help/prop_tgt/EXCLUDE_FROM_ALL.rst b/Help/prop_tgt/EXCLUDE_FROM_ALL.rst
index 0eee297..3aa296d 100644
--- a/Help/prop_tgt/EXCLUDE_FROM_ALL.rst
+++ b/Help/prop_tgt/EXCLUDE_FROM_ALL.rst
@@ -1,12 +1,15 @@
 EXCLUDE_FROM_ALL
 ----------------
 
-Exclude the target from the all target.
+Set this target property to a true (or false) value to exclude (or include)
+the target from the "all" target of the containing directory and its
+ancestors.  If excluded, running e.g. ``make`` in the containing directory
+or its ancestors will not build the target by default.
 
-A property on a target that indicates if the target is excluded from
-the default build target.  If it is not, then with a Makefile for
-example typing make will cause this target to be built.  The same
-concept applies to the default build of other generators.
+If this target property is not set then the target will be included in
+the "all" target of the containing directory.  Furthermore, it will be
+included in the "all" target of its ancestor directories unless the
+:prop_dir:`EXCLUDE_FROM_ALL` directory property is set.
 
 With ``EXCLUDE_FROM_ALL`` set to false or not set at all, the target
 will be brought up to date as part of doing a ``make install`` or its
@@ -16,6 +19,3 @@ target has undefined behavior.  Note that such a target can still safely
 be listed in an :command:`install(TARGETS)` command as long as the install
 components the target belongs to are not part of the set of components
 that anything tries to install.
-
-This property is enabled by default for targets that are created in
-directories that have :prop_dir:`EXCLUDE_FROM_ALL` set to ``TRUE``.
diff --git a/Help/release/3.14.rst b/Help/release/3.14.rst
index 229d8dc..8a9738c 100644
--- a/Help/release/3.14.rst
+++ b/Help/release/3.14.rst
@@ -428,3 +428,11 @@ Changes made since CMake 3.14.0 include the following.
   policy :policy:`CMP0088` ``NEW`` behavior accidentally interpreted
   a relative path to the ``.y`` input as relative to the build tree
   directory instead of the source tree directory.  This has been fixed.
+
+3.14.7
+------
+
+* In CMake 3.14.0 through 3.14.6, the :prop_dir:`EXCLUDE_FROM_ALL`
+  directory property was regressed from pre-3.14 behavior and caused
+  targets within the directory to be excluded even from its own "all".
+  This has been fixed.
diff --git a/Help/release/3.15.rst b/Help/release/3.15.rst
index 48f3aa4..957e6e9 100644
--- a/Help/release/3.15.rst
+++ b/Help/release/3.15.rst
@@ -376,3 +376,12 @@ Changes made since CMake 3.15.0 include the following.
 * ``CrayPrgEnv`` compiler wrapper support has been updated for the 19.06
   release of the Cray Programming Environment for which the default linking
   mode on XC Cray systems is now dynamic instead of static.
+
+3.15.4
+------
+
+* In CMake 3.15.0 through 3.15.3, the :prop_dir:`EXCLUDE_FROM_ALL`
+  directory property was regressed from pre-3.14 behavior and caused
+  targets within the directory to be excluded even from its own "all".
+  This has been fixed.
+  The bug also existed in 3.14.0 through 3.14.6 and is fixed in 3.14.7.