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annotate m4/tsearch.m4 @ 11219:aaeb2f86d096

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Fix *printf behaviour regarding the %ls directive.
author Bruno Haible <bruno@clisp.org>
date Thu, 26 Feb 2009 12:54:20 +0100
parents 53dc0fa4233a
children 56ceeef91c22
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # tsearch.m4 serial 3
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2 dnl Copyright (C) 2006-2008 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_TSEARCH],
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8 [
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9 AC_REQUIRE([gl_SEARCH_H_DEFAULTS])
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10 AC_CHECK_FUNCS([tsearch])
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11 if test $ac_cv_func_tsearch = yes; then
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12 dnl On OpenBSD 4.0, the return value of tdelete() is incorrect.
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13 AC_REQUIRE([AC_PROG_CC])
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14 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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15 AC_CACHE_CHECK([whether tdelete works], [gl_cv_func_tdelete_works],
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16 [
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17 AC_TRY_RUN([
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18 #include <stddef.h>
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19 #include <search.h>
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20 static int
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21 cmp_fn (const void *a, const void *b)
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22 {
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23 return *(const int *) a - *(const int *) b;
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24 }
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25 int
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26 main ()
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27 {
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28 int x = 0;
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29 void *root = NULL;
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30 if (!(tfind (&x, &root, cmp_fn) == NULL)) return 1;
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31 tsearch (&x, &root, cmp_fn);
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32 if (!(tfind (&x, &root, cmp_fn) != NULL)) return 1;
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33 if (!(tdelete (&x, &root, cmp_fn) != NULL)) return 1;
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34 return 0;
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35 }], [gl_cv_func_tdelete_works=yes], [gl_cv_func_tdelete_works=no],
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36 [case "$host_os" in
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37 openbsd*) gl_cv_func_tdelete_works="guessing no";;
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38 *) gl_cv_func_tdelete_works="guessing yes";;
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39 esac
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40 ])
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41 ])
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42 case "$gl_cv_func_tdelete_works" in
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43 *no)
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44 REPLACE_TSEARCH=1
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45 AC_LIBOBJ([tsearch])
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46 gl_PREREQ_TSEARCH
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47 ;;
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48 esac
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49 else
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50 HAVE_TSEARCH=0
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51 AC_LIBOBJ([tsearch])
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52 gl_PREREQ_TSEARCH
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53 fi
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54 ])
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55
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56 # Prerequisites of lib/tsearch.c.
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57 AC_DEFUN([gl_PREREQ_TSEARCH], [
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58 :
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59 ])