tce-load -i compiletc 

wget https://ftp.gnu.org/gnu/libunistring/libunistring-1.2.tar.xz

cd libunistring-1.2

CC="gcc -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" CXX="g++ -march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var --disable-static

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

make [7m 56.22s]
sudo make install