error : unknown type name 'sa_family_t' in openssl 1.1.1g

[Dan Fulger]

> Btw , even "internal/sockets.h " has " #include<sys/socket.h>".

Yes, but after #include <netdb.h>.

OTOH, netdb.h should #include<sys/socket.h>; can you send a download link for the cross compilation toolkit you are using?