platform will fail to build with CMake 4

[NHOrus]

CMake 4 raised minimum compatible version to CMake 3.5.
See https://gitlab.kitware.com/cmake/cmake/-/issues/26698 and https://gitlab.kitware.com/cmake/cmake/-/issues/26613
Also see https://bugs.gentoo.org/951812 for bug occurring in Gentoo testing

[bkuhls]

Should be fixed by d7faed1