new file mode 100644
--- /dev/null
+++ b/m4/xstrtol.m4
@@ -0,0 +1,37 @@
+# xstrtol.m4 serial 1
+dnl Copyright (C) 2002 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+AC_DEFUN([gl_XSTRTOL],
+[
+  AC_REQUIRE([gl_PREREQ_XSTRTOL])
+  AC_REQUIRE([gl_PREREQ_XSTRTOUL])
+])
+
+# Prerequisites of lib/xstrtol.h.
+AC_DEFUN([gl_PREREQ_XSTRTOL_H],
+[
+  AC_REQUIRE([jm_AC_TYPE_INTMAX_T])
+  AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])
+])
+
+# Prerequisites of lib/xstrtol.c.
+AC_DEFUN([gl_PREREQ_XSTRTOL],
+[
+  AC_REQUIRE([gl_PREREQ_XSTRTOL_H])
+  AC_REQUIRE([AC_HEADER_STDC])
+  AC_CHECK_HEADERS_ONCE(limits.h string.h)
+  AC_CHECK_FUNCS_ONCE(isascii)
+  AC_CHECK_DECLS_ONCE(strtol strtoul)
+  AC_CHECK_DECLS(strtoimax strtoumax)
+])
+
+# Prerequisites of lib/xstrtoul.c.
+AC_DEFUN([gl_PREREQ_XSTRTOUL],
+[
+  AC_REQUIRE([gl_PREREQ_XSTRTOL])
+])