my element can't be compiled

[knight9uzi]

Hello! I am trying to write my own Click element which include openssl/bn.h and functions like BN_new() from this library.
But when I run make install it shows undefined reference to `BN_new'.
I do this on linux ubuntu 20.04 and already install openssl.
Anyway to fix this?

[tbarbette]

Add ELEMENT_LIBS(-lopenssl) at the end of the .cc file so it know it must link with openssl