5262 libm needs to be carefully unifdef'd
5268 libm doesn't need to hide symbols which are already local

@@ -25,13 +25,11 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#if defined(ELFOBJ)
 #pragma weak nan = __nan
-#endif
 
 /*
  *  nan(c) returns a NaN.  This implementation ignores c.
  */