osx man page for glucheckextension

GLUCHECKEXTENSION(3G)													     GLUCHECKEXTENSION(3G)

NAME
       gluCheckExtension - determines if an extension name is supported

C SPECIFICATION
       GLboolean gluCheckExtension( const GLubyte *extName,
				    const GLubyte *extString )

PARAMETERS
       extName	  Specifies an extension name.

       extString  Specifies a space-separated list of extension names supported.

DESCRIPTION
       gluCheckExtension returns GL_TRUE if extName is supported otherwise GL_FALSE is returned.

       This  is  used  to  check for the presence for OpenGL, GLU or GLX extension names by passing the extension strings returned by glGetString,
       gluGetString, glXGetClientString, glXQueryExtensionsString, or glXQueryServerString, respectively, as extString.

NOTES
       Cases where one extension name is a substring of another are correctly handled.

       There may or may not be leading or trailing blanks in extString.

       Extension names should not contain embedded spaces.

       All strings are null-terminated.

SEE ALSO
       glGetString, gluGetString, glXGetClientString, glXQueryExtensionsString, glXQueryServerString

															     GLUCHECKEXTENSION(3G)