blob: d4ad759fd391ac683f82d7970d1e05eefeb7dc3a [file] [log] [blame]
# 00gnulib.m4 serial 2
dnl Copyright (C) 2009-2013 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.
dnl This file must be named something that sorts before all other
dnl gnulib-provided .m4 files. It is needed until such time as we can
dnl assume Autoconf 2.64, with its improved AC_DEFUN_ONCE semantics.
# ----------------------------
# Define NAME to expand to VALUE on the first use (whether by direct
# expansion, or by AC_REQUIRE), and to nothing on all subsequent uses.
# Avoid bugs in AC_REQUIRE in Autoconf 2.63 and earlier. This
# definition is slower than the version in Autoconf 2.64, because it
# can only use interfaces that existed since 2.59; but it achieves the
# same effect. Quoting is necessary to avoid confusing Automake.
m4_version_prereq([2.63.263], [],
[AC][_DEFUN([_gl_DEFUN_ONCE([$1])], [$2])])])
# gl_00GNULIB
# -----------
# Witness macro that this file has been included. Needed to force
# Automake to include this file prior to all other gnulib .m4 files.