tce-load -i compiletc python3.8-meson gtk3-dev pulseaudio-dev libgcrypt-dev vala-dev gnutls-dev gobject-introspection-dev gtk3-gir

wget https://download.gnome.org/sources/gtk-vnc/1.2/gtk-vnc-1.2.0.tar.xz

cd gtk-vnc-1.2.0

mkdir build
cd build

CC="gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -fno-exceptions -fno-rtti" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain

ninja [0m 37.40s]
sudo ninja install