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annotate m4/search_h.m4 @ 17616:cae23a655793

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author Karl Berry <karl@freefriends.org>
date Sat, 25 Jan 2014 06:40:43 -0800
parents 344018b6e5d7
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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14211
26a04a37c3d3 gl_CHECK_NEXT_HEADERS implies AC_CHECK_HEADERS_ONCE
Paul Eggert <eggert@cs.ucla.edu>
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1 # search_h.m4 serial 8
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Eric Blake <eblake@redhat.com>
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2 dnl Copyright (C) 2007-2014 Free Software Foundation, Inc.
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Bruno Haible <bruno@clisp.org>
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3 dnl This file is free software; the Free Software Foundation
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Bruno Haible <bruno@clisp.org>
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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_SEARCH_H],
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8 [
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9 AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
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10 gl_CHECK_NEXT_HEADERS([search.h])
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11 if test $ac_cv_header_search_h = yes; then
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12 HAVE_SEARCH_H=1
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13 else
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14 HAVE_SEARCH_H=0
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15 fi
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16 AC_SUBST([HAVE_SEARCH_H])
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17
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Eric Blake <ebb9@byu.net>
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18 dnl Check for declarations of anything we want to poison if the
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Eric Blake <ebb9@byu.net>
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19 dnl corresponding gnulib module is not in use.
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20 gl_WARN_ON_USE_PREPARE([[#include <search.h>
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21 ]], [tdelete tfind tsearch twalk])
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22 ])
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23
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24 AC_DEFUN([gl_SEARCH_MODULE_INDICATOR],
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25 [
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26 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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27 AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
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28 gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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29 dnl Define it also as a C macro, for the benefit of the unit tests.
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30 gl_MODULE_INDICATOR_FOR_TESTS([$1])
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31 ])
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32
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33 AC_DEFUN([gl_SEARCH_H_DEFAULTS],
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34 [
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35 GNULIB_TSEARCH=0; AC_SUBST([GNULIB_TSEARCH])
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36 dnl Assume proper GNU behavior unless another module says otherwise.
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Bruno Haible <bruno@clisp.org>
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37 HAVE_TSEARCH=1; AC_SUBST([HAVE_TSEARCH])
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38 REPLACE_TSEARCH=0; AC_SUBST([REPLACE_TSEARCH])
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39 ])