Installing Molden

[tkaplan]

I'm trying to install this program called molden. I have ubuntu 10.04 64 bit.

The errors I get in the make.log is
xwin.c:12:22: error: X11/Xlib.h: No such file or directory
xwin.c:13:23: error: X11/Xutil.h: No such file or directory
xwin.c:14:21: error: X11/Xos.h: No such file or directory
xwin.c:15:24: error: X11/keysym.h: No such file or directory
xwin.c:16:28: error: X11/cursorfont.h: No such file or directory
xwin.c:17:23: error: X11/Xatom.h: No such file or directory
There's a bunch more errors, but I'm guessing these error pertain to missing packages.
Could you tell me what pakages i need to install?