1 files changed, 7 insertions, 0 deletions
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 4ed76c7..b8a5293 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -4002,6 +4002,13 @@ bool cmMakefile::SetPolicy(cmPolicies::PolicyID id,
     return false;
   }
 
+  // Deprecate old policies, especially those that require a lot
+  // of code to maintain the old behavior.
+  if (status == cmPolicies::OLD && id <= cmPolicies::CMP0036) {
+    this->IssueMessage(cmake::DEPRECATION_WARNING,
+                       cmPolicies::GetPolicyDeprecatedWarning(id));
+  }
+
   this->StateSnapshot.SetPolicy(id, status);
   return true;
 }