Qt linker problem

Hi,

I am trying to create a Qt progam for Suse 7.0 which uses the OpenGL widget set. However when I try to compile it I get the following errors:

/usr/lib/qt/lib/libqgl.a(qgl.o): In function QGLWidget::~QGLWidget(void)': qgl.o(.text+0x1564): undefined reference toglXReleaseBuffersMESA’
/usr/lib/qt/lib/libqgl.a(qgl.o): In function QGLWidget::setContext(QGLContext *, QGLContext const *, bool)': qgl.o(.text+0x199b): undefined reference toglXReleaseBuffersMESA’
/usr/lib/qt/lib/libqgl.a(qgl.o): In function QGLWidget::renderPixmap(int, int, bool)': qgl.o(.text+0x1c2d): undefined reference toglXCreateGLXPixmapMESA’
collect2: ld returned 1 exit status

Where are these procedures? Which library are they in?

Cheers,

Maniark