#0  0xb7ff2456 in glViewport () from /usr/lib/libGL.so.1
#1  0x080575ad in ?? ()
#2  0x0805779a in ?? ()
#3  0xb7f354a8 in ?? () from /usr/lib/libXt.so.6
#4  0xb7f35f34 in ?? () from /usr/lib/libXt.so.6
#5  0xb7f3684f in _XtCreateWidget () from /usr/lib/libXt.so.6
#6  0xb7f36b14 in XtCreateManagedWidget () from /usr/lib/libXt.so.6
#7  0x0805e6e2 in ?? ()
#8  0xb7c7d775 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#9  0x0804a2d1 in ?? ()