How to check which version of openssl is getting compiled in into dovecot?

I got multiple versions of openssl in my system. I compile dovecot with PKG_CONFIG_PATH=/usr/openssl-1.0.2l-fpic/lib/pkgconfig ./configure

How do I check which version of openssl got compiled in? configure script does not show version. There seem to be no way to check it in compiled binary (?)

My dovecot is still seen vulnerable by tls testing tools so I'm guessing wrong version of openssl got compiled it but there seem to be no way to check it.