add_subdirectory: EXCLUDE_FROM_ALL breaks INTERFACE libraries
$ cat ../CMakeLists.txt
cmake_minimum_required(VERSION 3.13)
project(Example NONE)
add_subdirectory(sub EXCLUDE_FROM_ALL)
$ cat ../sub/CMakeLists.txt
add_library(iface INTERFACE)
$ cmake ..
CMake Error at sub/CMakeLists.txt:1 (add_library):
INTERFACE_LIBRARY targets may only have whitelisted properties. The
property "EXCLUDE_FROM_ALL" is not allowed.