tce-load -i compiletc libXmu-dev 

https://www.x.org/archive/individual/app/xkill-1.0.5.tar.bz2

cd xkill-1.0.5
 
CC="gcc -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var --sysconfdir=/etc

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

make
make install