Index: m4/scandir_argtypes.m4
===================================================================
--- m4/scandir_argtypes.m4	(revision 334)
+++ m4/scandir_argtypes.m4	(working copy)
@@ -12,7 +12,7 @@
  for ac_arg1 in 'const char *dir'; do
   for ac_arg2 in 'struct dirent ***namelist'; do
    for ac_arg3 in 'int(*filter)(const struct dirent *)' 'int(*filter)(struct dirent *)'; do
-    for ac_arg4 in 'int(*compar)(const void *,const void *)'; do
+    for ac_arg4 in 'int(*compar)(const void *,const void *)' 'int(*compar)(const struct dirent **, const struct dirent **)'; do
      AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM(
 [AC_INCLUDES_DEFAULT
@@ -46,3 +46,52 @@
 		   [Define to the type of arg 4 for `scandir'.])
 rm -f conftest*
 ])
+
+dnl  AC_FUNC_SCANDIR64_ARGTYPES
+dnl  -------------------------
+dnl  Determine the correct type to be passed to each of the `scandir64'
+dnl  function's arguments, and define those types in `SCANDIR64_TYPE_ARG1',
+dnl  `SCANDIR64_TYPE_ARG2', `SCANDIR64_TYPE_ARG3' and `SCANDIR64_TYPE_ARG4'.
+AN_FUNCTION([scandir64], [AC_FUNC_SCANDIR64_ARGTYPES])
+AC_DEFUN([AC_FUNC_SCANDIR64_ARGTYPES],
+[AC_CHECK_HEADERS(dirent.h)
+AC_CACHE_CHECK([types of arguments for scandir64],
+[ac_cv_func_scandir64_args],
+[for ac_return in 'int'; do
+ for ac_arg1 in 'const char *dir'; do
+  for ac_arg2 in 'struct dirent64 ***namelist'; do
+   for ac_arg3 in 'int(*filter)(const struct dirent64 *)' 'int(*filter)(struct dirent64 *)'; do
+    for ac_arg4 in 'int(*compar)(const void *,const void *)' 'int(*compar)(const struct dirent64 **, const struct dirent64 **)'; do
+     AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+[AC_INCLUDES_DEFAULT
+#ifdef HAVE_UNISTD_H
+#include <dirent.h>
+#endif
+],
+  	    [extern $ac_return scandir64 ($ac_arg1, $ac_arg2, $ac_arg3, $ac_arg4);])],
+	    [ac_cv_func_scandir64_args="$ac_return;$ac_arg1;$ac_arg2;$ac_arg3;$ac_arg4"; break 5])
+    done
+   done
+  done
+ done
+done
+# Provide a safe default value.
+: ${ac_cv_func_scandir64_args='(default) int;const char *dir;struct dirent64 ***namelist;int(*filter)(const struct dirent64 *);int(*compar)(const void *,const void *)'}
+])
+ac_save_IFS=$IFS; IFS=';'
+set dummy `echo "$ac_cv_func_scandir64_args" | sed 's/^(default) //' | sed 's/\*/\*/g'`
+IFS=$ac_save_IFS
+shift
+AC_DEFINE_UNQUOTED(SCANDIR64_TYPE_RETURN, $[1],
+		   [Define to the type of return value for `scandir64'.])
+AC_DEFINE_UNQUOTED(SCANDIR64_TYPE_ARG1, $[2],
+		   [Define to the type of arg 1 for `scandir64'.])
+AC_DEFINE_UNQUOTED(SCANDIR64_TYPE_ARG2, $[3],
+		   [Define to the type of arg 2 for `scandir64'.])
+AC_DEFINE_UNQUOTED(SCANDIR64_TYPE_ARG3, $[4],
+		   [Define to the type of arg 3 for `scandir64'.])
+AC_DEFINE_UNQUOTED(SCANDIR64_TYPE_ARG4, $[5],
+		   [Define to the type of arg 4 for `scandir64'.])
+rm -f conftest*
+])
Index: src/libfakechroot.c
===================================================================
--- src/libfakechroot.c	(revision 334)
+++ src/libfakechroot.c	(working copy)
@@ -512,10 +512,10 @@
 #endif
 static int     (*next_rmdir) (const char *pathname) = NULL;
 #ifdef HAVE_SCANDIR
-static int     (*next_scandir) (const char *dir, struct dirent ***namelist, SCANDIR_TYPE_ARG3, int(*compar)(const void *, const void *)) = NULL;
+static int     (*next_scandir) (SCANDIR_TYPE_ARG1, SCANDIR_TYPE_ARG2, SCANDIR_TYPE_ARG3, SCANDIR_TYPE_ARG4) = NULL;
 #endif
 #ifdef HAVE_SCANDIR64
-static int     (*next_scandir64) (const char *dir, struct dirent64 ***namelist, int(*filter)(const struct dirent64 *), int(*compar)(const void *, const void *)) = NULL;
+static int     (*next_scandir64) (SCANDIR64_TYPE_ARG1, SCANDIR64_TYPE_ARG2, SCANDIR64_TYPE_ARG3, SCANDIR64_TYPE_ARG4) = NULL;
 #endif
 #ifdef HAVE_SETXATTR
 static int     (*next_setxattr) (const char *path, const char *name, const void *value, size_t size, int flags) = NULL;
@@ -2619,7 +2619,7 @@
 
 #ifdef HAVE_SCANDIR
 /* #include <dirent.h> */
-int scandir (const char *dir, struct dirent ***namelist, SCANDIR_TYPE_ARG3, int(*compar)(const void *, const void *))
+int scandir (SCANDIR_TYPE_ARG1, SCANDIR_TYPE_ARG2, SCANDIR_TYPE_ARG3, SCANDIR_TYPE_ARG4)
 {
     char *fakechroot_path, *fakechroot_ptr, fakechroot_buf[FAKECHROOT_MAXPATH];
     expand_chroot_path(dir, fakechroot_path, fakechroot_ptr, fakechroot_buf);
@@ -2631,7 +2631,7 @@
 
 #ifdef HAVE_SCANDIR64
 /* #include <dirent.h> */
-int scandir64 (const char *dir, struct dirent64 ***namelist, int(*filter)(const struct dirent64 *), int(*compar)(const void *, const void *))
+int scandir64 (SCANDIR64_TYPE_ARG1, SCANDIR64_TYPE_ARG2, SCANDIR64_TYPE_ARG3, SCANDIR64_TYPE_ARG4)
 {
     char *fakechroot_path, *fakechroot_ptr, fakechroot_buf[FAKECHROOT_MAXPATH];
     expand_chroot_path(dir, fakechroot_path, fakechroot_ptr, fakechroot_buf);
Index: configure.ac
===================================================================
--- configure.ac	(revision 334)
+++ configure.ac	(working copy)
@@ -177,6 +177,7 @@
 
 AC_FUNC_READLINK_ARGTYPES
 AC_FUNC_SCANDIR_ARGTYPES
+AC_FUNC_SCANDIR64_ARGTYPES
 
 AC_CONFIG_FILES([ \
 Makefile \