1 # 00gnulib.m4 serial 2 2 dnl Copyright (C) 2009-2012 Free Software Foundation, Inc. 3 dnl This file is free software; the Free Software Foundation 4 dnl gives unlimited permission to copy and/or distribute it, 5 dnl with or without modifications, as long as this notice is preserved. 6 7 dnl This file must be named something that sorts before all other 8 dnl gnulib-provided .m4 files. It is needed until such time as we can 9 dnl assume Autoconf 2.64, with its improved AC_DEFUN_ONCE semantics. 10 11 # AC_DEFUN_ONCE([NAME], VALUE) 12 # ---------------------------- 13 # Define NAME to expand to VALUE on the first use (whether by direct 14 # expansion, or by AC_REQUIRE), and to nothing on all subsequent uses. 15 # Avoid bugs in AC_REQUIRE in Autoconf 2.63 and earlier. This 16 # definition is slower than the version in Autoconf 2.64, because it 17 # can only use interfaces that existed since 2.59; but it achieves the 18 # same effect. Quoting is necessary to avoid confusing Automake. 19 m4_version_prereq([2.63.263], [], 20 [m4_define([AC][_DEFUN_ONCE], 21 [AC][_DEFUN([$1], 22 [AC_REQUIRE([_gl_DEFUN_ONCE([$1])], 23 [m4_indir([_gl_DEFUN_ONCE([$1])])])])]dnl 24 [AC][_DEFUN([_gl_DEFUN_ONCE([$1])], [$2])])]) 25 26 # gl_00GNULIB 27 # ----------- 28 # Witness macro that this file has been included. Needed to force 29 # Automake to include this file prior to all other gnulib .m4 files. 30 AC_DEFUN([gl_00GNULIB]) 31
