tce-load -i compiletc 

cd re2c-0.16

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

[-fno-rtti fails]

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

make
sudo make install