CMake 3.14 changed the EXCLUDE_FROM_ALL behavior via !2816 (merged) for #17149 (closed). The change was thought to be backward compatible but at least one case has been identified where it is not. It has been reported on our mailing lists:

• https://cmake.org/pipermail/cmake/2019-September/069978.html
• https://cmake.org/pipermail/cmake-developers/2019-September/031236.html