1 files changed, 11 insertions, 0 deletions
diff --git a/Source/cmMessenger.h b/Source/cmMessenger.h
index b6f5712..451add0 100644
--- a/Source/cmMessenger.h
+++ b/Source/cmMessenger.h
@@ -4,8 +4,11 @@
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
+#include <iosfwd>
 #include <string>
 
+#include <cm/optional>
+
 #include "cmListFileCache.h"
 #include "cmMessageType.h"
 
@@ -19,6 +22,8 @@ public:
   void DisplayMessage(MessageType t, std::string const& text,
                       cmListFileBacktrace const& backtrace) const;
 
+  void SetTopSource(cm::optional<std::string> topSource);
+
   void SetSuppressDevWarnings(bool suppress)
   {
     this->SuppressDevWarnings = suppress;
@@ -47,10 +52,16 @@ public:
     return this->DeprecatedWarningsAsErrors;
   }
 
+  // Print the top of a backtrace.
+  void PrintBacktraceTitle(std::ostream& out,
+                           cmListFileBacktrace const& bt) const;
+
 private:
   bool IsMessageTypeVisible(MessageType t) const;
   MessageType ConvertMessageType(MessageType t) const;
 
+  cm::optional<std::string> TopSource;
+
   bool SuppressDevWarnings = false;
   bool SuppressDeprecatedWarnings = false;
   bool DevWarningsAsErrors = false;