Compute EC_KEY starting from X or Y coordinate only

[Luca Di Mauro]

Hello all,

I don't know if it is the correct mailing list to ask this, so I'm  
sorry if it is the wrong palce.

I'm using openssl v1.1, and I'm trying to compute both the X and Y  
coordinates of an elliptic curve point starting from a single  
coordinate (X or Y).

How can i perform that in C/C++ language using libssl? I searched on  
google for a couple of days but i haven't found a solution.

Luca Di Mauro