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diff --git a/m4/mkdirat.m4 b/m4/mkdirat.m4
new file mode 100644
index 00000000..d22604ac
--- /dev/null
+++ b/m4/mkdirat.m4
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+# mkdirat.m4 serial 1
+dnl Copyright (C) 2004-2013 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Written by Jim Meyering.
+
+AC_DEFUN([gl_FUNC_MKDIRAT],
+[
+  AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+  AC_CHECK_FUNCS_ONCE([mkdirat])
+  if test $ac_cv_func_mkdirat != yes; then
+    HAVE_MKDIRAT=0
+  fi
+])
+
+# Prerequisite of mkdirat's declaration and of lib/mkdirat.c.
+AC_DEFUN([gl_PREREQ_MKDIRAT],
+[
+  AC_REQUIRE([AC_TYPE_MODE_T])
+])