now hat glibc-2.6  declares futimens.
http://lists.gnu.org/archive/html/bug-gnulib/2007-05/msg00089.html

diff -ru cpio-2.7.orig/lib/utimens.c cpio-2.7/lib/utimens.c
--- cpio-2.7.orig/lib/utimens.c	2007-05-20 21:23:57.000000000 +0900
+++ cpio-2.7/lib/utimens.c	2007-05-21 08:40:22.000000000 +0900
@@ -73,7 +73,7 @@
    Return 0 on success, -1 (setting errno) on failure.  */
 
 int
-futimens (int fd ATTRIBUTE_UNUSED,
+gl_futimens (int fd ATTRIBUTE_UNUSED,
 	  char const *file, struct timespec const timespec[2])
 {
   /* There's currently no interface to set file timestamps with
@@ -166,5 +166,5 @@
 int
 utimens (char const *file, struct timespec const timespec[2])
 {
-  return futimens (-1, file, timespec);
+  return gl_futimens (-1, file, timespec);
 }
diff -ru cpio-2.7.orig/lib/utimens.h cpio-2.7/lib/utimens.h
--- cpio-2.7.orig/lib/utimens.h	2007-05-20 21:23:57.000000000 +0900
+++ cpio-2.7/lib/utimens.h	2007-05-21 08:39:57.000000000 +0900
@@ -1,3 +1,3 @@
 #include "timespec.h"
-int futimens (int, char const *, struct timespec const [2]);
+int gl_futimens (int, char const *, struct timespec const [2]);
 int utimens (char const *, struct timespec const [2]);
diff -ru coreutils-6.9.orig/src/copy.c coreutils-6.9/src/copy.c
--- coreutils-6.9.orig/src/copy.c	2007-05-21 09:27:22.000000000 +0900
+++ coreutils-6.9/src/copy.c	2007-05-21 09:27:47.000000000 +0900
@@ -623,7 +623,7 @@
       timespec[0] = get_stat_atime (src_sb);
       timespec[1] = get_stat_mtime (src_sb);
 
-      if (futimens (dest_desc, dst_name, timespec) != 0)
+      if (gl_futimens (dest_desc, dst_name, timespec) != 0)
 	{
 	  error (0, errno, _("preserving times for %s"), quote (dst_name));
 	  if (x->require_preserve)
diff -ru coreutils-6.9.orig/src/touch.c coreutils-6.9/src/touch.c
--- coreutils-6.9.orig/src/touch.c	2007-05-21 09:27:22.000000000 +0900
+++ coreutils-6.9/src/touch.c	2007-05-21 09:27:57.000000000 +0900
@@ -182,7 +182,7 @@
       t = timespec;
     }
 
-  ok = (futimens (fd, (fd == STDOUT_FILENO ? NULL : file), t) == 0);
+  ok = (gl_futimens (fd, (fd == STDOUT_FILENO ? NULL : file), t) == 0);
 
   if (fd == STDIN_FILENO)
     {