Siege https error: HTTPS requires libssl
Turns out the --prefix was needed to link up the libraries in my system. Even though installing seems to work fine and without errors if you don't supply that info. I set the prefix to the directory that siege was installing to before I supplied the prefix. So the installation ended up in the same directory but now it works with https.
This worked for me:
$ ./configure --prefix=/usr/local --with-ssl=/usr/bin/openssl$ make$ sudo make install