How do you set the language version for C# projects when generating projects with CMake?

Question

Version 3.8 of CMake supports generating Visual Studio C# projects. By default, it sets the language version ("LangVersion") to version 3 in the .csproj file. I need to change to a more recent language version, like version 6.

How do I override the language version in my CMakeLists.txt file?

Answer 1

You can set this as a compile flag on a target:

project(MyProject CSharp)
add_executable(MyExe main.cs)
target_compile_options(MyExe PRIVATE "/langversion:6")

Alternatively, you can set the global variable, to apply it to all future targets:

set(CMAKE_CSharp_FLAGS "/langversion:6")