How can I use glGetIntegerv(GL_TEXTURE_BINDING_2D, ...) on Mac OS?

I am trying to use GL_TEXTURE_BINDING_2D in my code, but it won't compile under Mac OS X (10.6). I included gl.h and glext.h, but for this code:

int prevTextureBinding;
glGetIntegerv(GL_TEXTURE_2D_BINDING, &prevTextureBinding);

I always get this error:

../FramebufferGroup.cpp:365: error:
    'GL_TEXTURE_2D_BINDING' was not declared in this scope

When using other OpenGL enums (like GL_TEXTURE_2D) I don't have any problems and can compile just fine - so my question is:

• Does anybody know if GL_TEXTURE_2D_BINDING is supported under Mac OS X

... I tried using GL_TEXTURE_2D_BINDING_EXT a开发者_JS百科s well, but the apple documentation seems to suggest that GL_TEXTURE_2D_BINDING should actually be a valid parameter: http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man3/glGet.3.html

Thank you!

It is called GL_TEXTURE_BINDING_2D, not GL_TEXTURE_2D_BINDING