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C++-notes.md

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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