tce-load -i compiletc openssl-dev libnl-dev linux-pam-dev libcap-ng-dev lzo-dev liblz4-dev

wget https://github.com/OpenVPN/openvpn/releases/download/v2.6.10/openvpn-2.6.10.tar.gz

cd openvpn-2.6.10

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --disable-static --localstatedir=/var

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make [0m 30.80s]
make install