tce-load -i 

cd libpng-1.6.13

gzip -cd ../libpng-1.6.13-apng.patch.gz | patch -p1

CC="gcc -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --disable-static

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

make
make install