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annotate m4/timegm.m4 @ 5611:87c42e194f4a

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Use an all-permissive copyright notice, recommended by RMS.
author Paul Eggert <eggert@cs.ucla.edu>
date Sun, 23 Jan 2005 08:06:57 +0000
parents 3d28ad4e18e2
children b31580167c2b
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1 # timegm.m4 serial 3
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2 dnl Copyright (C) 2003 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 AC_DEFUN([gl_FUNC_TIMEGM],
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8 [
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9 AC_REQUIRE([gl_FUNC_MKTIME])
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10 if test $ac_cv_func_working_mktime = no; then
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11 # Assume that timegm is buggy if mktime is.
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12 AC_LIBOBJ([timegm])
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13 ac_cv_func_timegm=no
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14 else
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15 AC_REPLACE_FUNCS(timegm)
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16 fi
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17 if test $ac_cv_func_timegm = no; then
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18 gl_PREREQ_TIMEGM
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19 fi
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20
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21 AC_CHECK_DECLS([timegm], , , [#include <time.h>])
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22 ])
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23
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24 # Prerequisites of lib/timegm.c.
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25 AC_DEFUN([gl_PREREQ_TIMEGM], [
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26 AC_REQUIRE([gl_TIME_R])
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27 AC_REQUIRE([gl_FUNC_MKTIME])
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28 if test $ac_cv_func_working_mktime = yes; then
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29 AC_CHECK_FUNC(__mktime_internal, ,
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30 [# mktime works but it doesn't export __mktime_internal,
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31 # so we need to substitute our own mktime implementation.
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32 AC_LIBOBJ([mktime])
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33 AC_DEFINE([mktime], [rpl_mktime],
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34 [Define to rpl_mktime if the replacement function should be used.])
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35 gl_PREREQ_MKTIME])
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36 fi
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37 ])