troubles with OpenGL

[Mario Olimpio de Menezes <mario@curiango.ipen.br>]

Hi,

	I'm trying to compile some examples from GEANT4 (from Cern)
using the opengl visualization driver (X Windows) version.
	The program compile fine but fail to link, giving me the
messages:

[...]
Compiling exampleN01.cc ...
Using granular libraries ...
Linking exampleN01 ...
/usr/X11R6/lib/libGL.a(glthread.o): In function `_glthread_InitTSD':
glthread.o(.text+0x21): undefined reference to `pthread_key_create'
/usr/X11R6/lib/libGL.a(glthread.o): In function `_glthread_GetTSD':
glthread.o(.text+0x75): undefined reference to `pthread_getspecific'
/usr/X11R6/lib/libGL.a(glthread.o): In function `_glthread_SetTSD':
glthread.o(.text+0xa8): undefined reference to `pthread_setspecific'
collect2: ld returned 1 exit status
make: *** [/usr/local/geant4.3.2/bin/Linux-g++/exampleN01] Error 1

	I have a NVidia TNT2 M64 card installed and working fine; have
xlibmesa3, xlibmesa-dev, xlibosmesa3, xlibosmesa-dev installed as well
nvidia-glx nvidia-glx-dev.
	Any help,
[]s
Mario O.de Menezes            "Many are the plans in a man's heart, but
    IPEN-CNEN/SP                 is the Lord's purpose that prevails"
http://curiango.ipen.br/~mario                 Prov. 19.21