mapgen in 4.1beta

Has anyone gotten mapgen to build under 4.1beta?

The Makefile in src.related/mapgen/graphics/plotter is failing with:

make: Fatal error: Don't know how to make target `/grass.src/4.1/src.related/mapgen/include/graphics.h'

Thanks for any help...
Andrew Hertz
hertz@geog.psu.edu