unresolved symbols

[Gyorgy Kovesdi]

Hi,

When i linking any program which uses libX11
i got following message:
/usr/X11R6/lib/libX11.so: undefined reference to address@hidden'
/usr/X11R6/lib/libX11.so: undefined reference to address@hidden'
/usr/X11R6/lib/libX11.so: undefined reference to address@hidden'
and, if i search a missing symbol:
$ nm /lib/libc.so.6 | grep shmctl
000e22d4 t __new_shmctl
000e24f0 t __old_shmctl
000e22d4 T shmctl@@GLIBC_2.2
000e24f0 T address@hidden
Can you help me what is it anyway?

Thanks in advance
    Kovesdi Gyorgy