Changes needed to get stdbuf to successfully preload libstdbuf.so
for both 32-bit and 64-bit applications. See comment in the patch
for more details.

--- coreutils-8.16/src/stdbuf.c.orig	2013-09-04 19:05:35.225857588 -0700
+++ coreutils-8.16/src/stdbuf.c	2013-09-04 19:11:51.945113130 -0700
@@ -195,37 +195,13 @@
      gcc stdbuf.c -Wl,-rpath,'$ORIGIN' -Wl,-rpath,$PKGLIBEXECDIR
      However we want the lookup done for the exec'd command not stdbuf.
 
-     Since we don't link against libstdbuf.so add it to PKGLIBEXECDIR
-     rather than to LIBDIR.  */
-  char const *const search_path[] = {
-    program_path,
-    PKGLIBEXECDIR,
-    NULL
-  };
+     Since we don't link against libstdbuf.so, we need to LD_PRELOAD it.
+     As libstdbuf.so lives in /usr/lib and /usr/lib/64, we just use
+     LD_PRELOAD=libstdbuf.so, and ld.so.1 finds the right one associated
+     with the process class. ie. we don't use full path names for the
+     preload names.  */
 
-  char const *const *path = search_path;
-  char *libstdbuf;
-
-  while (true)
-    {
-      struct stat sb;
-
-      if (!**path)              /* system default  */
-        {
-          libstdbuf = xstrdup (LIB_NAME);
-          break;
-        }
-      ret = asprintf (&libstdbuf, "%s/%s", *path, LIB_NAME);
-      if (ret < 0)
-        xalloc_die ();
-      if (stat (libstdbuf, &sb) == 0)   /* file_exists  */
-        break;
-      free (libstdbuf);
-
-      ++path;
-      if ( ! *path)
-        error (EXIT_CANCELED, 0, _("failed to find %s"), quote (LIB_NAME));
-    }
+  char *libstdbuf = xstrdup (LIB_NAME);
 
   /* FIXME: Do we need to support libstdbuf.dll, c:, '\' separators etc?  */