Autogen: Add (CMAKE_)AUTOGEN_ORIGIN_DEPENDS support

This adds

- the variable ``CMAKE_AUTOGEN_ORIGIN_DEPENDS`` which initializes
- the target property ``AUTOGEN_ORIGIN_DEPENDS``

which controls whether or not the origin target dependencies
should be forwarded to the corresponding ``_autogen`` target.

The default value of ``CMAKE_AUTOGEN_ORIGIN_DEPENDS`` is ``ON``
which corresponds to the behavior that is in place since CMake 3.9.

Closes: #18493

1 files changed, 1 insertions, 0 deletions

diff --git a/Source/cmQtAutoGenInitializer.h b/Source/cmQtAutoGenInitializer.h
index ce00e00fea..1d3947b4b4 100644
--- a/Source/cmQtAutoGenInitializer.h
+++ b/Source/cmQtAutoGenInitializer.h
@@ -107,6 +107,7 @@ private:
     std::string SettingsFile;
     std::map<std::string, std::string> ConfigSettingsFile;
     // Dependencies
+    bool DependOrigin = false;
     std::set<std::string> DependFiles;
     std::set<cmTarget*> DependTargets;
     // Sources to process