tce-load -i compiletc garcon-dev exo-dev libxfce4windowing-dev gobject-introspection-dev vala-dev libxfce4util-gir

wget https://archive.xfce.org/src/xfce/xfce4-panel/4.20/xfce4-panel-4.20.6.tar.bz2

cd xfce4-panel

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 --disable-gtk-doc-html

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

make [1m 41.22s]
sudo make install

Build Configuration:

* Debug support:                 minimum
* GNU Visibility support:        yes
* GObject Introspection support: yes
* Documentation support:         no
* D-Bus menu support:            no
* X11 support:                   yes
* Wayland support:               yes
  * GTK Layer Shell support:     no