Comment from Marco [here](https://github.com/bitcoin/bitcoin/pull/19954#discussion_r503075378):
> + make -C src --jobs=1 check-security V=1
make: Entering directory '/bitcoin/distsrc-x86_64-linux-gnu/src'
Checking binary security...
READELF=/gnu/store/pzq9s5ldl90h72p26jkdakyccdg9ib3k-profile/bin/x86_64-linux-gnu-readelf OBJDUMP=x86_64-linux-gnu-objdump OTOOL= /gnu/store/pzq9s5ldl90h72p26jkdakyccdg9ib3k-profile/bin/python3.7 ../contrib/devtools/security-check.py bitcoind  bitcoin-cli bitcoin-tx bitcoin-wallet test/test_bitcoin bench/bench_bitcoin qt/bitcoin-qt  
make: Leaving directory '/bitcoin/distsrc-x86_64-linux-gnu/src'
> + case "$HOST" in
> + make -C src --jobs=1 check-symbols V=1
make: Entering directory '/bitcoin/distsrc-x86_64-linux-gnu/src'
Checking glibc back compat...
READELF=/gnu/store/pzq9s5ldl90h72p26jkdakyccdg9ib3k-profile/bin/x86_64-linux-gnu-readelf CPPFILT=/gnu/store/pzq9s5ldl90h72p26jkdakyccdg9ib3k-profile/bin/x86_64-linux-gnu-c++filt /gnu/store/pzq9s5ldl90h72p26jkdakyccdg9ib3k-profile/bin/python3.7 ../contrib/devtools/symbol-check.py bitcoind  bitcoin-cli bitcoin-tx bitcoin-wallet test/test_bitcoin bench/bench_bitcoin qt/bitcoin-qt  
test/test_bitcoin: export of symbol in6addr_loopback not allowed
test/test_bitcoin: failed EXPORTED_SYMBOLS
make: *** [Makefile:20952: check-symbols] Error 1
make: Leaving directory '/bitcoin/distsrc-x86_64-linux-gnu/src'

**test/test_bitcoin: export of symbol in6addr_loopback not allowed**
{
    BOOST_CHECK_EQUAL(ParseNetwork("ipv4"), NET_IPV4);
    BOOST_CHECK_EQUAL(ParseNetwork("ipv6"), NET_IPV6);
    BOOST_CHECK_EQUAL(ParseNetwork("onion"), NET_ONION);
    BOOST_CHECK_EQUAL(ParseNetwork("tor"), NET_ONION);
    BOOST_CHECK_EQUAL(ParseNetwork("IPv4"), NET_IPV4);
    BOOST_CHECK_EQUAL(ParseNetwork("IPv6"), NET_IPV6);
    BOOST_CHECK_EQUAL(ParseNetwork("ONION"), NET_ONION);
    BOOST_CHECK_EQUAL(ParseNetwork("TOR"), NET_ONION);
    BOOST_CHECK_EQUAL(ParseNetwork(":)"), NET_UNROUTABLE);
    BOOST_CHECK_EQUAL(ParseNetwork("tÖr"), NET_UNROUTABLE);
    BOOST_CHECK_EQUAL(ParseNetwork("\xfe\xff"), NET_UNROUTABLE);
    BOOST_CHECK_EQUAL(ParseNetwork(""), NET_UNROUTABLE);
}
BOOST_AUTO_TEST_CASE(netpermissions_test)
{
    bilingual_str error;
    NetWhitebindPermissions whitebindPermissions;
    NetWhitelistPermissions whitelistPermissions;
    /
    BOOST_CHECK(!NetWhitebindPermissions::TryParse("", whitebindPermissions, error));
    BOOST_CHECK(error.original.find("Cannot resolve -whitebind address") != std::string::npos);
    BOOST_CHECK(!NetWhitebindPermissions::TryParse("127.0.0.1", whitebindPermissions, error));
    BOOST_CHECK(error.original.find("Need to specify a port with -whitebind") != std::string::npos);