tce-load -i compiletc cmake openssl-dev libjpeg-turbo-dev libpng-dev

https://github.com/LibVNC/libvncserver/archive/LibVNCServer-0.9.12.tar.gz

cd libvncserver-LibVNCServer-0.9.12

mkdir build
cd build

cmake -LAH -DCMAKE_C_FLAGS_RELEASE="-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -fno-exceptions -fno-rtti" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -Wno-dev ../

make [1m 1.26s]
sudo make install