+/* make sure that we pickup the correct stuff from all headers */
+#define _XOPEN_SOURCE 600
+#if HAVE_FEATURES_H
+# include <features.h>
+#endif
+
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+
+#if HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+#ifndef MAXPATH
+# ifdef PATH_MAX
+# define MAXPATH PATH_MAX
+# endif
+#endif
+#ifndef MAXPATH
+/* else try the BSD variant */
+# ifdef MAXPATHLEN
+# define MAXPATH MAXPATHLEN
+# endif
+#endif
+
+#if HAVE_ERRNO_H
+# include <errno.h>
+#endif
+
+#if HAVE_SYS_MMAN_H
+# include <sys/mman.h>
+#endif
+#if !defined HAVE_MADVISE && defined HAVE_POSIX_MADVISE
+/* use posix_madvise family */
+# define madvise posix_madvise
+# define MADV_NORMAL POSIX_MADV_NORMAL
+# define MADV_RANDOM POSIX_MADV_RANDOM
+# define MADV_SEQUENTIAL POSIX_MADV_SEQUENTIAL
+# define MADV_WILLNEED POSIX_MADV_WILLNEED
+# define MADV_DONTNEED POSIX_MADV_DONTNEED
+#endif
+#if defined HAVE_MADVISE || defined HAVE_POSIX_MADVISE
+# define USE_MADVISE 1
+#endif
+
+#if HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+
+/* enable posix_fadvise on linux */
+#if defined(HAVE_POSIX_FADVISE) && defined(HAVE_FCNTL_H)
+#include <fcntl.h>
+#endif
+
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+
+#if HAVE_SYS_TIMES_H
+# include <sys/times.h>
+#endif
+
+#if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#if (defined(__svr4__) && defined(__sun__))
+/* Solaris headers (pre 2.6) don't have a getrusage prototype.
+ Use this instead. */
+extern int getrusage(int, struct rusage *);
+#endif /* __svr4__ && __sun__ */
+#endif
+