tce-load -i compiletc libxfce4ui-dev gobject-introspection-dev

wget https://archive.xfce.org/src/xfce/exo/4.20/exo-4.20.0.tar.bz2

cd exo-4.20.0

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 [0m 20.92s]
sudo make install

Build Configuration:

* Debug Support:                 minimum
* GObject Introspection support: yes