Gentoo's Bugzilla –
Attachment 521350 Details for
Bug 649004net-wireless/wpa_supplicant with >=dev-libs/openssl-1.1.0 - .../temp/ccTbFGP1.ltrans3.ltrans.o: In function `tls_init': <artificial>:(.text+0x6963): undefined reference to `ENGINE_load_dynamic'