tce-load -i 

cd libffi-3.0.13

patch -Np1 -i ../libffi-3.0.13-includedir-1.patch

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 --disable-static

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

make
sudo make install