Pass arguments that are not modified as const&.

Use clang-tidy's performance-unnecessary-value-param checker to find
value parameter declarations of expensive to copy types that are not
modified inside the function.  Ignore findings in kwsys.
After applying the fix-its, manually change `const T&` to `T const&`.

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmState.h b/Source/cmState.h
index 7ecac56..18c45b8 100644
--- a/Source/cmState.h
+++ b/Source/cmState.h
@@ -164,9 +164,9 @@ public:
     void ClearCompileOptions();
 
     void SetProperty(const std::string& prop, const char* value,
-                     cmListFileBacktrace lfbt);
+                     cmListFileBacktrace const& lfbt);
     void AppendProperty(const std::string& prop, const char* value,
-                        bool asString, cmListFileBacktrace lfbt);
+                        bool asString, cmListFileBacktrace const& lfbt);
     const char* GetProperty(const std::string& prop) const;
     const char* GetProperty(const std::string& prop, bool chain) const;
     bool GetPropertyAsBool(const std::string& prop) const;