"NetBSD has disabled auto-importing of functions by default in Bash, and so has FreeBSD, choosing to provide this as an opt-in function when invoked with a newl

"NetBSD has disabled auto-importing of functions by default in Bash, and so has FreeBSD, choosing to provide this as an opt-in function when invoked with a newly added --import-functions option." For me this looks like a very good choice and I wonder how much it would break on the major Linux distributions?