LibOSMesa absence leads to j602a graphics failure
On Slackware-12.1 j602a is installed but fails in its graphical demonstrations with the message: "testdlls''; OpenGL create context failed. OpenGL not available."
It is suggested that the cause is the absence of LibOSMesa, and indeed it is not there, nor can slapt-get find it.
Is there an appropriate version, and if so, how can I get it?