pb to compile arts

when i tray to compile i have that:

g++-3.3 -DHAVE_CONFIG_H -I. -I. -I.. -I../mcop -I/opt/kde/include 
-I/sw/include -I../libltdl -DQT_THREAD_SUPPORT -fno-common 
-no-cpp-precomp -DMACOSX -DARTS_NO_ALARM -I/usr/X11R6/include/freetype2 
-I/sw/lib/flex/include -I/opt/kde/include -I/sw/include -D_REENTRANT 
-I/sw/include/glib-2.0 -I/sw/lib/glib-2.0/include -Wnon-virtual-dtor 
-Wno-long-long -Wundef -Wall -W -Wpointer-arith -Wwrite-strings 
-fno-builtin -g -Os -fno-exceptions -fno-check-new -fno-common -DQT_MAC 
-no-cpp-precomp -ftemplate-depth-99 -c x11globalcomm_impl.cc -MT 
x11globalcomm_impl.lo -MD -MP -MF .deps/x11globalcomm_impl.TPlo  
-fno-common -DPIC -o .libs/x11globalcomm_impl.o
x11globalcomm_impl.cc:31:22: X11/Xlib.h: No such file or directory
x11globalcomm_impl.cc:32:23: X11/Xatom.h: No such file or directory
x11globalcomm_impl.cc:42: error: syntax error before `*' token
x11globalcomm_impl.cc:43: error: 'Window' is used as a type, but is not 
defined
    as a type.
x11globalcomm_impl.cc:44: error: 'Atom' is used as a type, but is not 
defined
    as a type.
x11globalcomm_impl.cc: In constructor 
`X11GlobalComm_impl::X11GlobalComm_impl()
    ':
x11globalcomm_impl.cc:53: error: class `X11GlobalComm_impl' does not 
have any
    field named `rootWin'
x11globalcomm_impl.cc:53: error: class `X11GlobalComm_impl' does not 
have any
    field named `atom'
x11globalcomm_impl.cc:55: error: `X11display' undeclared (first use this
    function)
x11globalcomm_impl.cc:55: error: (Each undeclared identifier is 
reported only
    once for each function it appears in.)
x11globalcomm_impl.cc:55: error: `XOpenDisplay' undeclared (first use 
this
    function)
x11globalcomm_impl.cc:63: error: `rootWin' undeclared (first use this 
function)
x11globalcomm_impl.cc:63: error: `DefaultRootWindow' undeclared (first 
use this
    function)
x11globalcomm_impl.cc:64: error: `atom' undeclared (first use this 
function)
x11globalcomm_impl.cc:64: error: `False' undeclared (first use this 
function)
x11globalcomm_impl.cc:64: error: `XInternAtom' undeclared (first use 
this
    function)
x11globalcomm_impl.cc: In destructor `virtual
    X11GlobalComm_impl::~X11GlobalComm_impl()':
x11globalcomm_impl.cc:72: error: `XCloseDisplay' undeclared (first use 
this
    function)
x11globalcomm_impl.cc: In member function `void 
X11GlobalComm_impl::read()':
x11globalcomm_impl.cc:79: error: `Atom' undeclared (first use this 
function)
x11globalcomm_impl.cc:79: error: parse error before `;' token
x11globalcomm_impl.cc:96: error: `XA_STRING' undeclared (first use this
    function)
x11globalcomm_impl.cc:96: error: `type' undeclared (first use this 
function)
x11globalcomm_impl.cc:97: error: `XGetWindowProperty' undeclared (first 
use
    this function)
x11globalcomm_impl.cc:99: error: `None' undeclared (first use this 
function)
x11globalcomm_impl.cc:105: error: `XFree' undeclared (first use this 
function)
x11globalcomm_impl.cc: In member function `void 
X11GlobalComm_impl::write()':
x11globalcomm_impl.cc:146: error: `PropModeReplace' undeclared (first 
use this
    function)
x11globalcomm_impl.cc:148: error: `XChangeProperty' undeclared (first 
use this
    function)
x11globalcomm_impl.cc:149: error: `XFlush' undeclared (first use this 
function)
make[2]: *** [x11globalcomm_impl.lo] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

I know that it's a problem with X11 but i don't know what