Windows build fails trying to create symlinks

[pezcode]

There are a few custom targets that create symlinks, like this one:

if (WIN32)
    add_custom_target(ResourcesDir ALL
        COMMAND IF NOT EXIST ${RESOURCES_DST} mklink /J ${RESOURCES_DST} ${RESOURCES_SRC}
    )
else ()
    add_custom_target(ResourcesDir ALL
        COMMAND ${CMAKE_COMMAND} -E create_symlink ${RESOURCES_SRC} ${RESOURCES_DST}
    )
endif ()

This fails trying to compile on Win10 1803 with VS 2017:

6>You do not have sufficient privilege to perform this operation.
5>C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VC\VCTargets\Microsoft.CppCommon.targets(209,5): error MSB6006: "cmd.exe" exited with code 1.

The reason behind it failing is a bit odd but the solution is pretty straightforward: Replace all mklink /D with mklink /J.