Autogen: Add detection of UI file changes to the pre-build VS case

This is achieved by adding a rule file which carries the UI files as dependencies but performs no meaningful command. Its output path points to a timestamp file which is instead touched by the pre-build command that runs autogen. The rule file therefore triggers the build if any of the files have been changed more recently than the last autogen run.

Fixes: #17959
Fixes: #18741

1 files changed, 1 insertions, 0 deletions

diff --git a/Source/cmQtAutoGenInitializer.h b/Source/cmQtAutoGenInitializer.h
index d096315..8a6d8f9 100644
--- a/Source/cmQtAutoGenInitializer.h
+++ b/Source/cmQtAutoGenInitializer.h
@@ -238,6 +238,7 @@ private:
       : GenVarsT(GenT::UIC){};
 
     std::set<std::string> SkipUi;
+    std::vector<std::string> UiFilesNoOptions;
     std::vector<UiFileT> UiFilesWithOptions;
     ConfigStrings<std::vector<std::string>> Options;
     std::vector<std::string> SearchPaths;