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annotate m4/wcrtomb.m4 @ 17921:58c1b50299a6

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getopt: give accurate ambiguity diagnostic on mem exhaustion * lib/getopt.c (_getopt_internal_r): The previous commit broke out the loop too early, which could give a false indication of ambiguous options under memory exhaustion.
author Pádraig Brady <P@draigBrady.com>
date Wed, 18 Feb 2015 22:37:31 +0000
parents ab58d4870664
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # wcrtomb.m4 serial 11
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ab58d4870664 version-etc: new year
Paul Eggert <eggert@cs.ucla.edu>
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2 dnl Copyright (C) 2008-2015 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_WCRTOMB],
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8 [
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9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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10
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11 AC_REQUIRE([AC_TYPE_MBSTATE_T])
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12 gl_MBSTATE_T_BROKEN
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13
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14 AC_CHECK_FUNCS_ONCE([wcrtomb])
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15 if test $ac_cv_func_wcrtomb = no; then
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16 HAVE_WCRTOMB=0
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17 AC_CHECK_DECLS([wcrtomb],,, [[
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18 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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19 <wchar.h>.
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20 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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21 included before <wchar.h>. */
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22 #include <stddef.h>
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23 #include <stdio.h>
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24 #include <time.h>
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25 #include <wchar.h>
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26 ]])
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27 if test $ac_cv_have_decl_wcrtomb = yes; then
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28 dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although
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29 dnl it does not have the function. Avoid a collision with gnulib's
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30 dnl replacement.
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31 REPLACE_WCRTOMB=1
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32 fi
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33 else
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34 if test $REPLACE_MBSTATE_T = 1; then
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35 REPLACE_WCRTOMB=1
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36 else
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37 dnl On AIX 4.3, OSF/1 5.1 and Solaris 10, wcrtomb (NULL, 0, NULL) sometimes
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38 dnl returns 0 instead of 1.
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39 AC_REQUIRE([AC_PROG_CC])
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40 AC_REQUIRE([gt_LOCALE_FR])
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41 AC_REQUIRE([gt_LOCALE_FR_UTF8])
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42 AC_REQUIRE([gt_LOCALE_JA])
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43 AC_REQUIRE([gt_LOCALE_ZH_CN])
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44 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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45 AC_CACHE_CHECK([whether wcrtomb return value is correct],
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46 [gl_cv_func_wcrtomb_retval],
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47 [
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48 dnl Initial guess, used when cross-compiling or when no suitable locale
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49 dnl is present.
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50 changequote(,)dnl
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51 case "$host_os" in
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52 # Guess no on AIX 4, OSF/1 and Solaris.
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53 aix4* | osf* | solaris*) gl_cv_func_wcrtomb_retval="guessing no" ;;
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54 # Guess yes otherwise.
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55 *) gl_cv_func_wcrtomb_retval="guessing yes" ;;
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56 esac
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57 changequote([,])dnl
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58 if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
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59 AC_RUN_IFELSE(
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60 [AC_LANG_SOURCE([[
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61 #include <locale.h>
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62 #include <string.h>
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63 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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64 <wchar.h>.
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65 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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66 included before <wchar.h>. */
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67 #include <stddef.h>
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68 #include <stdio.h>
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69 #include <time.h>
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70 #include <wchar.h>
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71 int main ()
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72 {
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73 int result = 0;
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74 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
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75 {
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76 if (wcrtomb (NULL, 0, NULL) != 1)
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77 result |= 1;
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78 }
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79 if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
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80 {
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81 if (wcrtomb (NULL, 0, NULL) != 1)
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82 result |= 2;
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83 }
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84 if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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85 {
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86 if (wcrtomb (NULL, 0, NULL) != 1)
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87 result |= 4;
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88 }
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89 if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
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90 {
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91 if (wcrtomb (NULL, 0, NULL) != 1)
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92 result |= 8;
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93 }
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94 return result;
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95 }]])],
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96 [gl_cv_func_wcrtomb_retval=yes],
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97 [gl_cv_func_wcrtomb_retval=no],
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98 [:])
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99 fi
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100 ])
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101 case "$gl_cv_func_wcrtomb_retval" in
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102 *yes) ;;
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103 *) REPLACE_WCRTOMB=1 ;;
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104 esac
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105 fi
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106 fi
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107 ])
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108
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109 # Prerequisites of lib/wcrtomb.c.
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110 AC_DEFUN([gl_PREREQ_WCRTOMB], [
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111 :
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112 ])