CMake: set_languages("c++17"), language not set in CMakeLists.txt

[paul-reilly]

Create an xmake project with:

set_languages("c++17")

Create a CMakeLists.txt project file with xmake:

xmake project -k cmake

The resulting CMakeLists.txt does not have the language standard set for the target, eg:

target_compile_features(my_target PRIVATE cxx_std_17)

[waruqi]

I have supported it on dev branch. You can try it again.

[paul-reilly]

That's it fixed, thanks!