+# ifndef NLIST_STRUCT
+# if HAVE_NLIST_H
+# define NLIST_STRUCT
+# endif
+# endif
+
+/* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */
+# ifndef NLIST_STRUCT
+
+# ifdef MORE_BSD
+# define NLIST_STRUCT
+# endif
+
+# ifdef sun
+# define NLIST_STRUCT
+# endif
+
+# ifdef decstation
+# define NLIST_STRUCT
+# endif
+
+# ifdef hpux
+# define NLIST_STRUCT
+# endif
+
+# if defined (_SEQUENT_) || defined (sequent)
+# define NLIST_STRUCT
+# endif
+
+# ifdef sgi
+# define NLIST_STRUCT
+# endif
+
+# ifdef SVR4
+# define NLIST_STRUCT
+# endif
+
+# ifdef sony_news
+# define NLIST_STRUCT
+# endif
+
+# ifdef OSF_ALPHA
+# define NLIST_STRUCT
+# endif
+
+# if defined (ardent) && defined (titan)
+# define NLIST_STRUCT
+# endif
+
+# ifdef tek4300
+# define NLIST_STRUCT
+# endif
+
+# ifdef butterfly
+# define NLIST_STRUCT
+# endif
+
+# if defined(alliant) && defined(i860) /* Alliant FX/2800 */
+# define NLIST_STRUCT
+# endif
+
+# ifdef _AIX
+# define NLIST_STRUCT
+# endif
+
+# endif /* defined (NLIST_STRUCT) */
+
+