# define _XOPEN_SOURCE 500
# endif
#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \
- !defined(_M_UNIX) && !defined(sgi) && !defined(__DragonFly__)
+ !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__)
#define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
#define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
#endif
extern void release_pack_memory(size_t, int);
-extern void set_try_to_free_routine(void (*routine)(size_t));
+typedef void (*try_to_free_t)(size_t);
+extern try_to_free_t set_try_to_free_routine(try_to_free_t);
extern char *xstrdup(const char *str);
extern void *xmalloc(size_t size);