Gentoo's Bugzilla –
Attachment 854764 Details for
Bug 897862net-dns/dnssec-validator-2.2.3-r2 fails to compile (MUSL-CLANG-SYSTEM): res_tsig.c:142:9: error: call to undeclared function ns_name_pton; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]