tce-load -i compiletc python3.6 libxml2-bin

wget https://xorg.freedesktop.org/archive/individual/proto/xcb-proto-1.14.1.tar.xz

cd xcb-proto-1.14.1

PYTHON=python3 CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var --sysconfdir=/etc

make
make install