Created attachment 585982 [details] emerge --info net-dns/bind-tools-9.14.4[-ssl] is failing to build because of $(use_with ssl openssl "${EPREFIX}"/usr) in src_configure. Maybe a workaround like in bug 607400 could fix the issue.
Created attachment 585984 [details] build.log
Created attachment 585986 [details] environment
I think openssl is not an optional depend of bind anymore (with DNSSEC and friends). ./configure detection always wants an SSL implementation.
From CHANGES file: 4945. [func] BIND can no longer be built without DNSSEC support. A cryptography provder (i.e., OpenSSL or a hardware service module with PKCS#11 support) must be available. [GL #244] 4936. [func] Always use OpenSSL or PKCS#11 random data providers, and remove the --{enable,disable}-crypto-rand configure options. [GL #165] I don't know whether net-dns/bind-tools executables indeed cannot be built without DNSSEC support (e.g. libcrypto symbols in bin/delv/delv comes from lib/isc/aes.c) but the change in the configure.ac seems intentional.
fixed in all versions of bind{,-tools}