We build cockroach on Ubuntu, which follows Debian's lead in building ncurses with --with-versioned-syms; a number of distros (apparently including Gentoo) don't set this. This results in ld.so printing to stderr:
cockroach: /usr/lib64/libtinfo.so.6: no version information available (required by cockroach)
which is safe to ignore, but means that some assumptions we've made in Omicron's cockroach-admin don't hold on certain Linux distros, causing a couple of that crate's tests to fail when run on certain distros.
We might want to consider doing the Linux build in an old-as-hell container image similar to how CRL does their Linux builds.