2 dnl Copyright (C) 2008-2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_WCRTOMB],
9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
11 AC_REQUIRE([AC_TYPE_MBSTATE_T])
14 AC_CHECK_FUNCS_ONCE([wcrtomb])
15 if test $ac_cv_func_wcrtomb = no; then
17 AC_CHECK_DECLS([wcrtomb],,, [[
20 if test $ac_cv_have_decl_wcrtomb = yes; then
21 dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although
22 dnl it does not have the function. Avoid a collision with gnulib's
27 dnl We don't actually need to override wcrtomb when redefining the semantics
28 dnl of the mbstate_t type. Tested on 32-bit AIX.
29 dnl if test $REPLACE_MBSTATE_T = 1; then
32 if test $REPLACE_WCRTOMB = 0; then
33 dnl On Android 4.3, wcrtomb produces wrong characters in the C locale.
34 dnl On AIX 4.3, OSF/1 5.1 and Solaris <= 11.3, wcrtomb (NULL, 0, NULL)
35 dnl sometimes returns 0 instead of 1.
36 AC_REQUIRE([AC_PROG_CC])
37 AC_REQUIRE([gt_LOCALE_FR])
38 AC_REQUIRE([gt_LOCALE_FR_UTF8])
39 AC_REQUIRE([gt_LOCALE_JA])
40 AC_REQUIRE([gt_LOCALE_ZH_CN])
41 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
42 AC_CACHE_CHECK([whether wcrtomb works in the C locale],
43 [gl_cv_func_wcrtomb_works],
54 memset (&state, 0, sizeof (state));
56 count = wcrtomb (out, L'a', &state);
57 return !(count == 1 && out[0] == 'a');
59 [gl_cv_func_wcrtomb_works=yes],
60 [gl_cv_func_wcrtomb_works=no],
62 # Guess no on Android.
63 linux*-android*) gl_cv_func_wcrtomb_works="guessing no";;
64 # Guess yes otherwise.
65 *) gl_cv_func_wcrtomb_works="guessing yes";;
69 case "$gl_cv_func_wcrtomb_works" in
71 *) AC_DEFINE([WCRTOMB_C_LOCALE_BUG], [1],
72 [Define if the wcrtomb function does not work in the C locale.])
76 if test $REPLACE_WCRTOMB = 0; then
77 AC_CACHE_CHECK([whether wcrtomb return value is correct],
78 [gl_cv_func_wcrtomb_retval],
80 dnl Initial guess, used when cross-compiling or when no suitable locale
84 # Guess no on AIX 4, OSF/1, Solaris, native Windows.
85 aix4* | osf* | solaris* | mingw*) gl_cv_func_wcrtomb_retval="guessing no" ;;
86 # Guess yes otherwise.
87 *) gl_cv_func_wcrtomb_retval="guessing yes" ;;
90 if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
100 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
102 if (wcrtomb (NULL, 0, NULL) != 1)
105 if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
107 if (wcrtomb (NULL, 0, NULL) != 1)
110 wchar_t wc = (wchar_t) 0xBADFACE;
111 if (mbtowc (&wc, "\303\274", 2) == 2)
112 if (wcrtomb (NULL, wc, NULL) != 1)
116 if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
118 if (wcrtomb (NULL, 0, NULL) != 1)
121 if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
123 if (wcrtomb (NULL, 0, NULL) != 1)
128 [gl_cv_func_wcrtomb_retval=yes],
129 [gl_cv_func_wcrtomb_retval=no],
133 case "$gl_cv_func_wcrtomb_retval" in
135 *) AC_DEFINE([WCRTOMB_RETVAL_BUG], [1],
136 [Define if the wcrtomb function has an incorrect return value.])
143 # Prerequisites of lib/wcrtomb.c.
144 AC_DEFUN([gl_PREREQ_WCRTOMB], [