* fileio.c (Fmake_symbolic_link): Treat ENOSYS specially, and

generate a special message for it.  Suggested by Eli Zaretskii in
<http://lists.gnu.org/archive/html/emacs-devel/2011-02/msg00995.html>.

src/ChangeLog

 2011-02-25  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Simplify symlink portability workaround.
+	* fileio.c (Fmake_symbolic_link): Treat ENOSYS specially, and
+	generate a special message for it.  Suggested by Eli Zaretskii in
+	<http://lists.gnu.org/archive/html/emacs-devel/2011-02/msg00995.html>.
 	* config.in: Regenerate.
 
 	* dired.c (Ffile_attributes): Increase size of modes from 10 to 12

src/fileio.c

@@ -2325,6 +2325,12 @@ This happens for interactive use with M-x.  */)
 	      return Qnil;
 	    }
 	}
+      if (errno == ENOSYS)
+	{
+	  UNGCPRO;
+	  xsignal1 (Qfile_error,
+		    build_string ("Symbolic links are not supported"));
+	}
 
       report_file_error ("Making symbolic link", list2 (filename, linkname));
     }