cmake HELLOIMGUI_HAS_DIRECTX11 examples

pthom/hello_imgui CMakeLists.txt :93 

option(HELLOIMGUI_HAS_DIRECTX11 "Use DirectX11 as a rendering backend" OFF)

pthom/hello_imgui hello_imgui_cmake/hello_imgui_build_lib.cmake :97 

message(WARNING "
        HELLOIMGUI_USE_SDL_DIRECTX11 is deprecated,
        use HELLOIMGUI_USE_SDL2 + HELLOIMGUI_HAS_DIRECTX11 instead")

pthom/hello_imgui hello_imgui_cmake/hello_imgui_build_lib.cmake :104 

message(WARNING "
        HELLOIMGUI_USE_GLFW_DIRECTX11 is deprecated,
        use HELLOIMGUI_USE_GLFW3 + HELLOIMGUI_HAS_DIRECTX11 instead")

pthom/hello_imgui hello_imgui_cmake/hello_imgui_build_lib.cmake :916 

target_compile_definitions(${HELLOIMGUI_TARGET} PUBLIC HELLOIMGUI_HAS_DIRECTX11)