const GLubyte *extString )

PARAMETERS
       extName    Specifies an extension name.

       extString  Specifies  a  space-separated  list  of  extension names sup‐
                  ported.

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 glXQuery‐
       ServerString, 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)