mysql-router binary ships unnecessary shared objects in /usr/lib/mysql-router

[Robie Basak]

Since these aren't plugins and nor are they part of any public API/ABI, one would expect mysql-router to be statically built instead.

[Christian Ehrhardt  (paelzer)]

That code is reused between the binaries it provides.
Those in /usr/bin as well as the router plugins all link to those.

I might miss something, but are you sure this needs to change?

root@k:~# for f in /usr/bin/mysqlrouter* /usr/lib/mysqlrouter/plugin/*.so; do echo $f; ldd $f | grep -e '/usr/lib/mysql-router' ; done
/usr/bin/mysqlrouter
 libmysqlrouter.so.1 => /usr/lib/mysql-router/libmysqlrouter.so.1 (0x00007f4d6060e000)
 libmysqlharness.so.1 => /usr/lib/mysql-router/libmysqlharness.so.1 (0x00007f4d60545000)
 libmysqlharness_stdx.so.1 => /usr/lib/mysql-router/libmysqlharness_stdx.so.1 (0x00007f4d5fafa000)
/usr/bin/mysqlrouter_keyring
 libmysqlrouter.so.1 => /usr/lib/mysql-router/libmysqlrouter.so.1 (0x00007f3098d25000)
 libmysqlharness.so.1 => /usr/lib/mysql-router/libmysqlharness.so.1 (0x00007f3098c5c000)
 libmysqlharness_stdx.so.1 => /usr/lib/mysql-router/libmysqlharness_stdx.so.1 (0x00007f3098211000)
/usr/bin/mysqlrouter_passwd
 libmysqlrouter_http_auth_backend.so.1 => /usr/lib/mysql-router/libmysqlrouter_http_auth_backend.so.1 (0x00007f3f8c55b000)
 libmysqlrouter.so.1 => /usr/lib/mysql-router/libmysqlrouter.so.1 (0x00007f3f8bde2000)
 libmysqlharness.so.1 => /usr/lib/mysql-router/libmysqlharness.so.1 (0x00007f3f8bd19000)
 libmysqlharness_stdx.so.1 => /usr/lib/mysql-router/libmysqlharness_stdx.so.1 (0x00007f3f8b2ce000)
/usr/bin/mysqlrouter_plugin_info
 libmysqlharness.so.1 => /usr/lib/mysql-router/libmysqlharness.so.1 (0x00007f9518a09000)
/usr/lib/mysqlrouter/plugin/connection_pool.so
 libmysqlrouter_connection_pool.so.1 => /usr/lib/mysql-router/libmysqlrouter_connection_pool.so.1 (0x00007f8e8ebd9000)
 libmysqlharness.so.1 => /usr/lib/mysql-router/libmysqlharness.so.1 (0x00007f8e8eb10000)
/usr/lib/mysqlrouter/plugin/http_auth_backend.so
 libmysqlrouter_http_auth_backend.so.1 => /usr/lib/mysql-router/libmysqlrouter_http_auth_backend.so.1 (0x00007ff7a4eac000)
 libmysqlrouter_metadata_cache.so.1 => /usr/lib/mysql-router/libmysqlrouter_metadata_cache.so.1 (0x00007ff7a4e07000)
 libmysqlharness.so.1 => /usr/lib/mysql-router/libmysqlharness.so.1 (0x00007ff7a4d3e000)
 libmysqlrouter.so.1 => /usr/lib/mysql-router/libmysqlrouter.so.1 (0x00007ff7a3b81000)
 libmysqlrouter_mysqlxmessages.so.1 => /usr/lib/mysql-router/libmysqlrouter_mysqlxmessages.so.1 (0x00007ff7a3b32000)
 libmysqlharness_stdx.so.1 => /usr/lib/mysql-router/libmysqlharness_stdx.so.1 (0x00007ff7a3974000)
/usr/lib/mysqlrouter/plugin/http_auth_realm.so
 libmysqlrouter_http_auth_realm.so.1 => /usr/lib/mysql-router/libmysqlrouter_http_auth_realm.so.1 (0x00007fdd28557000)
 libmysqlharness.so.1 => /usr/lib/mysql-router/libmysqlharness.so.1 (0x00007fdd2848e000)
 libmysqlrouter_http_auth_backend.so.1 => /usr/lib/mysql-router/libmysqlrouter_http_auth_backend.so.1 (0x00007fdd27ffd000)
/usr/lib/mysqlrouter/plugin/http_server.so
 libmysqlrouter_http_auth_realm.so.1 => /usr/lib/mysql-router/libmysqlrouter_http_auth_realm.so.1 (0x00007f90068c6000)
 libmysqlrouter_http_auth_backend.so.1 => /usr/lib/mysql-router/libmysqlrouter_http_auth_backend.so.1 (0x00007f900620e000)
 libmysqlrouter_http.so.1 => /usr/lib/mysql-router/libmysqlrouter_http.so.1 (0x00007f90061fc000)
 libmysqlharness_tls.so.1 => /usr/...

[Robie Basak (racb)]

It was a while ago but I'm guessing I assumed it was only used by one binary. I guess if there are multiple binaries sharing then this makes sense.

I'd like it to be difficult for other packages to use something that isn't a public API/ABI, but I'm not sure there is an easy mechanism for that apart from to avoid packaging headers and/or pkg-config, etc.