How to compile a simple program with OpenSSL?

Question

I am trying to compile a simple ssl program (it was taken from the openssl book source code). The program has the following files: common.h common.c client.c server.c

<

Answer 1

In some code versions of openssl book, the thread related functions are stored in reentrant.c, (in fact the declaration of TRHEAD_setup, in the version i've seen is there), so try with:

gcc -Wall common.c client.c reentrant.c -o client -lcrypto -lssl