tce-load -i compiletc cmake ninja libX11-dev pixman-dev ffmpeg7-dev

wget https://github.com/TigerVNC/tigervnc/archive/refs/tags/v1.16.2.tar.gz

cd tigervnc-1.16.2

mkdir build
cd build

cmake -LAH -DCMAKE_C_FLAGS_RELEASE="-flto -mtune=generic -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-flto -mtune=generic -Os -pipe" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -DCMAKE_INSTALL_LIBEXECDIR=lib/x0vncserver -G Ninja ../

[-fno-rtti fails]
[need to set libexecdir]

  FLTK NOT found.  TigerVNC viewer disabled. 

ninja [0m 47.11s]
sudo ninja install