Migrating C++/CLI project throws compiler warning C4945

NavrimCPP commented 1 year ago

The Solution contains a combination of C#, C++/CLI and C++ projects. I followed the guide for migrating C++/CLI projects.(https://learn.microsoft.com/en-us/dotnet/core/porting/cpp-cli.)

I need to specify the FrameworkReference for WPF ().

When compiling, I get many C4945 warnings. Because we have TreatWarningsAsErrors enabled, the project can't be compiled. Disabling TreatWarningsAsErrors or disabling the C4945 warnings is not a permanent solution for us.

Example C4945 warning: warning C4945: 'BulletChrome': cannot import symbol from 'C:\Program Files\dotnet\packs\Microsoft.WindowsDesktop.App.Ref\6.0.14\ref\net6.0\PresentationFramework.Aero2.dll': as 'Microsoft::Windows::Themes::BulletChrome' has already been imported from another assembly 'PresentationFramework.Aero'

The warnings can be easily reproduced

Create a new C++/CLI(.NET) Project

Add the following to the .vcxproj file

<ItemGroup>
    <FrameworkReference Include="Microsoft.WindowsDesktop.App.Wpf" />
</ItemGroup>

And Compile

What can I do to stop these warnings from occurring?

Previously, I was able to reference explicitly, e.g.

<ItemGroup>
    <Reference Include="PresentationCore" />
    <Reference Include="System" />
    <Reference Include="System.Core" />
    <Reference Include="System.Xaml" />
    <Reference Include="WindowsBase" />
</ItemGroup>

marcpopMSFT commented 1 year ago

@jaredpar any pointers on those compiler warnings in a c++/CLI app?

jaredpar commented 1 year ago

@dangrif have any pointers here?

NavrimCPP commented 1 year ago

Hi, is there any new information about the problem?

Wittenborn commented 6 months ago

We encountered the same problem. Is there any news regarding the problem or advice on how to work around the error?

I have created a minimal project to reproduce the warning and it is sufficient to simply reference the framework to trigger the warning: https://github.com/Wittenborn/cpp-cli-warning-C4945/