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