tce-load -wil compiletc openssl-dev expat2-dev

wget https://github.com/NLnetLabs/unbound/archive/refs/tags/release-1.19.3.tar.gz

cd unbound-release-1.19.3

CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local

sed -i 's/-g -O2//' Makefile

make [1m 37.67s]
mkdir /tmp/dest
make DESTDIR=/tmp/dest install