3 files changed, 36 insertions, 1 deletions
diff --git a/Source/cmGetTargetPropertyCommand.cxx b/Source/cmGetTargetPropertyCommand.cxx
index 02f00a5..488cc28 100644
--- a/Source/cmGetTargetPropertyCommand.cxx
+++ b/Source/cmGetTargetPropertyCommand.cxx
@@ -40,7 +40,36 @@ bool cmGetTargetPropertyCommand
     cmTarget& target = *tgt;
     prop = target.GetProperty(args[2].c_str());
     }
-
+  else
+    {
+    bool issueMessage = false;
+    cmOStringStream e;
+    cmake::MessageType messageType = cmake::AUTHOR_WARNING;
+    switch(this->Makefile->GetPolicyStatus(cmPolicies::CMP0045))
+      {
+      case cmPolicies::WARN:
+        issueMessage = true;
+        e << this->Makefile->GetPolicies()
+                          ->GetPolicyWarning(cmPolicies::CMP0045) << "\n";
+      case cmPolicies::OLD:
+        break;
+      case cmPolicies::REQUIRED_IF_USED:
+      case cmPolicies::REQUIRED_ALWAYS:
+      case cmPolicies::NEW:
+        issueMessage = true;
+        messageType = cmake::FATAL_ERROR;
+      }
+    if (issueMessage)
+      {
+      e << "get_target_property() called with non-existent target \""
+        << targetName <<  "\".";
+      this->Makefile->IssueMessage(messageType, e.str().c_str());
+      if (messageType == cmake::FATAL_ERROR)
+        {
+        return false;
+        }
+      }
+    }
   if (prop)
     {
     this->Makefile->AddDefinition(var.c_str(), prop);
diff --git a/Source/cmPolicies.cxx b/Source/cmPolicies.cxx
index c9dacaf..5a189f8 100644
--- a/Source/cmPolicies.cxx
+++ b/Source/cmPolicies.cxx
@@ -326,6 +326,11 @@ cmPolicies::cmPolicies()
     CMP0044, "CMP0044",
     "Case sensitive <LANG>_COMPILER_ID generator expressions.",
     3,0,0,0, cmPolicies::WARN);
+
+  this->DefinePolicy(
+    CMP0045, "CMP0045",
+    "Error on non-existent target in get_target_property.",
+    3,0,0,0, cmPolicies::WARN);
 }
 
 cmPolicies::~cmPolicies()
diff --git a/Source/cmPolicies.h b/Source/cmPolicies.h
index 0d7327f..b1342bf 100644
--- a/Source/cmPolicies.h
+++ b/Source/cmPolicies.h
@@ -98,6 +98,7 @@ public:
     CMP0042, ///< Enable MACOSX_RPATH by default
     CMP0043, ///< Ignore COMPILE_DEFINITIONS_<Config> properties
     CMP0044, ///< Case sensitive <LANG>_COMPILER_ID generator expressions
+    CMP0045, ///< Error on non-existent target in get_target_property
 
     /** \brief Always the last entry.
      *