Can't install PiTFT (fbcp) Support using Pi 3

[Larry Bell]

So I'm doing the PiGRRL 2 project using a raspberry pi 3 and every time I run this line in the terminal:
"curl -O https://raw.githubusercontent.com/adafruit/Raspberry-Pi-Installer-Scripts/master/pitft-fbcp.sh"
I get this error:
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
curl: (35) Unknown SSL protocol error in connection to raw.githubusercontent.com:443 "
What should I do?

[mitu]

@larry-bell Although this has nothing to do with RetroPie, the error comes from an older/outdated OpenSSL library on your system.
When curl tries to download the file from raw.githubusercontent.com, it cannot understand the encryption protocol the site uses.

TL;DR - update/upgrade your system. On a stock RetroPie image (which is based on Raspbian Jessie), kept up-to date, the command you're trying to run works without problems. The versions for cURL/OpenSSL are shown in the output of the curl -V command:

pi@retropie:~ $ curl -V
curl 7.38.0 (arm-unknown-linux-gnueabihf) libcurl/7.38.0 OpenSSL/1.0.1t zlib/1.2.8 libidn/1.29 libssh2/1.4.3 librtmp/2.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp scp sftp smtp smtps telnet tftp
Features: AsynchDNS IDN IPv6 Largefile GSS-API SPNEGO NTLM NTLM_WB SSL libz TLS-SRP