From Eric Wing, "Attached is a change for GLExtensions.cpp that allows OS X to use dlopen/dlsym instead of NS*Symbol* functions for 10.3 or later. The latter is now deprecated.
From Eric Wing, "Attached is a change for GLExtensions.cpp that allows OS X to use
dlopen/dlsym instead of NS*Symbol* functions for 10.3 or later. The
latter is now deprecated.

I'm not completely sure how to test the changes. But I compiled these
new changes in and ran the osgvertexprogram and osgshaders examples
and they seemed to display the same results as before.

With respect to the use of dlopen and dlsym, I was uncertain if the
usage should look like Sun or FreeBSD (or something else). Apple's man
pages discourage the use of RTLD_DEFAULT so I avoided the FreeBSD
implementation and copied the Sun implementation. I'm not sure if this
is correct/ideal or not."


git-svn-id: 23b6355f2bb369032457de4eb5f713ee134f73a8@5512 16af8721-9629-0410-8352-f15c8da7e697

joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg