This fails due to -Wvoid-pointer-to-enum-cast because RadiusType is an enum which has smaller width than the void *sock_ctx. Upstream doesn't seem to have fixed this and FreeBSD's suppressing the warning seems more complicated than adding an intermediate cast to intptr_t.
https://github.com/freebsd/freebsd-ports/blob/5ec99c62e498b8c2a3e585c93b1d4de28b69b3b3/security/wpa_supplicant/files/patch-src_radius_radius__client.c I don't have a setup to actually test this. Index: Makefile =================================================================== RCS file: /cvs/ports/security/wpa_supplicant/Makefile,v retrieving revision 1.49 diff -u -p -r1.49 Makefile --- Makefile 5 Feb 2021 19:57:54 -0000 1.49 +++ Makefile 10 Mar 2021 19:41:17 -0000 @@ -3,7 +3,7 @@ COMMENT= IEEE 802.1X supplicant DISTNAME= wpa_supplicant-2.9 -REVISION= 0 +REVISION= 1 CATEGORIES= security net HOMEPAGE= https://w1.fi/wpa_supplicant/ Index: patches/patch-src_radius_radius_client_c =================================================================== RCS file: patches/patch-src_radius_radius_client_c diff -N patches/patch-src_radius_radius_client_c --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-src_radius_radius_client_c 10 Mar 2021 19:57:41 -0000 @@ -0,0 +1,16 @@ +$OpenBSD$ + +Fix build failure due to -Wvoid-pointer-to-enum-cast + +Index: src/radius/radius_client.c +--- src/radius/radius_client.c.orig ++++ src/radius/radius_client.c +@@ -814,7 +814,7 @@ static void radius_client_receive(int sock, void *eloo + { + struct radius_client_data *radius = eloop_ctx; + struct hostapd_radius_servers *conf = radius->conf; +- RadiusType msg_type = (RadiusType) sock_ctx; ++ RadiusType msg_type = (RadiusType)(intptr_t) sock_ctx; + int len, roundtrip; + unsigned char buf[3000]; + struct radius_msg *msg;
