1# wcrtomb.m4 serial 11
2dnl Copyright (C) 2008-2013 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7AC_DEFUN([gl_FUNC_WCRTOMB],
8[
9  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
10
11  AC_REQUIRE([AC_TYPE_MBSTATE_T])
12  gl_MBSTATE_T_BROKEN
13
14  AC_CHECK_FUNCS_ONCE([wcrtomb])
15  if test $ac_cv_func_wcrtomb = no; then
16    HAVE_WCRTOMB=0
17    AC_CHECK_DECLS([wcrtomb],,, [[
18/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
19   <wchar.h>.
20   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
21   included before <wchar.h>.  */
22#include <stddef.h>
23#include <stdio.h>
24#include <time.h>
25#include <wchar.h>
26]])
27    if test $ac_cv_have_decl_wcrtomb = yes; then
28      dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although
29      dnl it does not have the function. Avoid a collision with gnulib's
30      dnl replacement.
31      REPLACE_WCRTOMB=1
32    fi
33  else
34    if test $REPLACE_MBSTATE_T = 1; then
35      REPLACE_WCRTOMB=1
36    else
37      dnl On AIX 4.3, OSF/1 5.1 and Solaris 10, wcrtomb (NULL, 0, NULL) sometimes
38      dnl returns 0 instead of 1.
39      AC_REQUIRE([AC_PROG_CC])
40      AC_REQUIRE([gt_LOCALE_FR])
41      AC_REQUIRE([gt_LOCALE_FR_UTF8])
42      AC_REQUIRE([gt_LOCALE_JA])
43      AC_REQUIRE([gt_LOCALE_ZH_CN])
44      AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
45      AC_CACHE_CHECK([whether wcrtomb return value is correct],
46        [gl_cv_func_wcrtomb_retval],
47        [
48          dnl Initial guess, used when cross-compiling or when no suitable locale
49          dnl is present.
50changequote(,)dnl
51          case "$host_os" in
52                                     # Guess no on AIX 4, OSF/1 and Solaris.
53            aix4* | osf* | solaris*) gl_cv_func_wcrtomb_retval="guessing no" ;;
54                                     # Guess yes otherwise.
55            *)                       gl_cv_func_wcrtomb_retval="guessing yes" ;;
56          esac
57changequote([,])dnl
58          if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
59            AC_RUN_IFELSE(
60              [AC_LANG_SOURCE([[
61#include <locale.h>
62#include <string.h>
63/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
64   <wchar.h>.
65   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
66   included before <wchar.h>.  */
67#include <stddef.h>
68#include <stdio.h>
69#include <time.h>
70#include <wchar.h>
71int main ()
72{
73  int result = 0;
74  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
75    {
76      if (wcrtomb (NULL, 0, NULL) != 1)
77        result |= 1;
78    }
79  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
80    {
81      if (wcrtomb (NULL, 0, NULL) != 1)
82        result |= 2;
83    }
84  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
85    {
86      if (wcrtomb (NULL, 0, NULL) != 1)
87        result |= 4;
88    }
89  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
90    {
91      if (wcrtomb (NULL, 0, NULL) != 1)
92        result |= 8;
93    }
94  return result;
95}]])],
96              [gl_cv_func_wcrtomb_retval=yes],
97              [gl_cv_func_wcrtomb_retval=no],
98              [:])
99          fi
100        ])
101      case "$gl_cv_func_wcrtomb_retval" in
102        *yes) ;;
103        *) REPLACE_WCRTOMB=1 ;;
104      esac
105    fi
106  fi
107])
108
109# Prerequisites of lib/wcrtomb.c.
110AC_DEFUN([gl_PREREQ_WCRTOMB], [
111  :
112])
113