tce-load -i compiletc 

wget 

cd db-6.0.19

cd build_unix

CC="gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" ../dist/configure --prefix=/usr/local --localstatedir=/var --disable-rpath --enable-shared --disable-static --enable-compat185 --disable-dump185 --enable-cxx

[-fno-exceptions fails]

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;
find . -name Makefile -type f -exec sed -i 's/-O3//g' {} \;

make [8m 4.34s]
sudo make install