tce-load -i compiletc python-dev scons pygobject-dev python-numpy swig libmypaint-dev mypaint-brushes gtk3-dev gtk3-gir

cd mypaint-1.2.1

sudo cp /tmp/tcloop/gcc_libs-dev/usr/local/lib/libgomp.spec /usr/lib

edit SConstruct, brushlib/SConstruct
    env.Prepend(CCFLAGS='-flto -fuse-linker-plugin -mtune=generic -Os -pipe', LINKFLAGS='-flto -fuse-linker-plugin -mtune=generic -Os -pipe')

sudo scons prefix=/usr/local install