Trying to run the Lightsmark demo on gentoo (amd64).

I have unmasked and installed freeimage.

When trying to run it I get

Lightsmark (Run 1 of 1)

./backend: error while loading shared libraries: libgomp.so.1: cannot open shared object file: No such file or directory

Any ideas ?

p.s - works fine on opensuse 11 (amd64)