From Gentoo Wiki
This discussion is done as of July 25, 2017.
According to wpa_supplicant's changelog there is no need any longer to set
wpa_supplicant_eth0="-Dnl80211" in /etc/conf.d/net. Older versions have already been removed from the tree.
This discussion is done as of October 31, 2021.
- There has been a dev who has expressed interest in keeping it with some upstream patches. Will wait on such action first. --Grknight (talk) 17:24, 5 February 2020 (UTC)