tce-load -i compiletc bzip2-dev

https://downloads.sourceforge.net/infozip/zip30.tar.gz

cd zip30

find . -name Makefile -type f -exec sed -i 's/-O3//g' {} \;

edit unix/Makefile
CC = gcc -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe
CPP = /usr/local/bin/cpp
CFLAGS = $(CFLAGS_NOOPT)

make -f unix/Makefile generic_gcc [0m 37.56s]
sudo make prefix=/usr/local MANDIR=/usr/local/share/man/man1 -f unix/Makefile install