wpf/Documentation/C++-notes.md

C++ Notes

• $(RepoRoot)eng\WpfArcadeSdk\tools\ contains Wpf.Cpp.Props,Wpf.Cpp.targets, Wpf.Cpp.PrivateTools.props and Wpf.Cpp.PrivateTools.targets, which contain all the important C++ related properties
• We need to undefine the TargetFramework property when ProjectReference-ing a C++/CLI project from a C# project
  • When a C++/CLI project is built directly from the solution, TargetFramework=net6.0-windows etc. property is NOT passed to it.
  • When the same project is built via a C# project, it receives a global property TargetFramework=net6.0-windows.
  • This results in msbuild treating those two instances as sufficiently different and builds them independently.
    • In turn, the same project is built twice (often simultaneously), and results in simultaneous writes to the PDB etc.
    • This leads to build failures.
  • The solution is to delete TargetFramework property when specifying ProjectReference to a C++/CLI project from a C# project, like this: <ProjectReference Include="$(WpfSourceDir)PresentationCore\CPP\PresentationCoreCpp.vcxproj"> <UndefineProperties>TargetFramework;TargetFrameworks</UndefineProperties> </ProjectReference>

Deprecated Compiler Features

• /nowarn:D9035 is now being passed to build.ps1 in order to suppress the following C++ compiler warnings:
  • cl : Command line error D9035: option 'clr:pure' has been deprecated and will be removed in a future release
  • cl : Command line error D9035: option 'Zc:forScope-' has been deprecated and will be removed in a future release