version `GLIBCXX_3.4.21' not found (required by plugins/log-plugin.so)

[TemaSM]

samp-log (log-plugin.so) compiled using newer version of gcc, but official SAMP server can only use gcc 4.9.2 - libstdc++ 6.0.20 (max supported GLIBCXX_3.4.20):

see screenshot

If you try to use newer gcc (5, 6, etc) with newer version of libstdc++, samp03svr starts running very unstable with random players disconnects.
That's why when using default gcc (4.9.2), plugin cannot be loaded on server start:

[00:05:00]  Loading plugin: log-plugin.so
[00:05:00]   Failed (/srv/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by plugins/log-plugin.so))

How about to support older version of gcc & libstdc++?
Maybe we can compile samp-log with statically linked libstdc++?