From c8d27c1f8726211d4d68c2c2a97e72b3ab14badc Mon Sep 17 00:00:00 2001
From: Johan Laanstra <jlaans@microsoft.com>
Date: Mon, 21 Oct 2019 12:18:22 -0700
Subject: [PATCH] Only build the reference projection when there are
 references.

Only build the reference projection when there are references.
---
 nuget/Microsoft.Windows.CppWinRT.targets | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nuget/Microsoft.Windows.CppWinRT.targets b/nuget/Microsoft.Windows.CppWinRT.targets
index 8f1ff0a63..f16f243e5 100644
--- a/nuget/Microsoft.Windows.CppWinRT.targets
+++ b/nuget/Microsoft.Windows.CppWinRT.targets
@@ -443,7 +443,7 @@ $(XamlMetaDataProviderPch)
 
   <!--Build reference projection from WinMD project references and dynamic library project references-->
   <Target Name="CppWinRTMakeReferenceProjection"
-          Condition="'$(CppWinRTEnableReferenceProjection)' == 'true'"
+          Condition="'@(CppWinRTDirectWinMDReferences)@(CppWinRTDynamicProjectWinMDReferences)' != '' AND '$(CppWinRTEnableReferenceProjection)' == 'true'"
           DependsOnTargets="GetCppWinRTProjectWinMDReferences;GetCppWinRTPlatformWinMDReferences;GetCppWinRTDirectWinMDReferences;$(CppWinRTMakeReferenceProjectionDependsOn)"
           Inputs="@(CppWinRTDirectWinMDReferences);@(CppWinRTDynamicProjectWinMDReferences);@(CppWinRTPlatformWinMDReferences)"
           Outputs="@(CppWinRTDirectWinMDReferences->'$(GeneratedFilesDir)winrt\%(Filename).h');@(CppWinRTDynamicProjectWinMDReferences->'$(GeneratedFilesDir)winrt\%(Filename).h')">