/usr/include/eicode.h is in erlang-dev 1:16.b.3-dfsg-1ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/include/../lib/erlang/lib/erl_interface-3.7.15/include/eicode.h
/usr/include/../lib/erlang/lib/erl_interface-3.7.15/include/eicode.h