export CFLAGS="-march=i486 -mtune=i686 -Os -pipe"
export CXXFLAGS="-march=i486 -mtune=i686 -Os -pipe"

load the gtk2-dev, pangomm-dev, atkmm-dev extensions

gtkmm-2.22.0
------------
./configure --prefix=/usr/local --disable-documentation

time make [real    9m 39.02s]
sudo make install