tce-load -i compiletc
 
wget https://github.com/p7zip-project/p7zip/archive/v17.04/p7zip-17.04.tar.gz

cd p7zip_17.04

edit makefile.machine
OPTFLAGS=
CC=gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe
CXX=g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe

make all3 [15m 3.61s]
sudo make DEST_HOME=/usr/local DEST_MAN=/usr/local/share/man DEST_SHARE_DOC=/usr/local/share/doc/p7zip-17.04 install