tce-load -i 

cd fftw-3.3.5

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 --enable-shared --disable-static --localstatedir=/var

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

make
sudo make install