tce-load -i compiletc exo-dev garcon-dev libxml2-bin xf86-input-libinput-dev libcanberra-dev libxklavier-dev 

wget https://archive.xfce.org/src/xfce/xfce4-settings/4.20/xfce4-settings-4.20.3.tar.bz2

cd xfce4-settings-4.20.3

CC="gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var --disable-static --enable-sound-settings

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

make [0m 41.06s]
sudo make install

Build Configuration:

* Installation prefix:              /usr/local
* Debug Support:                    minimum
* X11 Support:                      yes
  * Xrandr support:                 yes
  * Xcursor support:                yes
  * Xorg libinput support:          yes
  * Libxklavier support:            yes
  * Libnotify support:              yes
* Wayland Support:                  yes
  * GTK Layer Shell support:        no
* UPower support:                   no
* Colord support:                   no
* Sounds settings support:          yes