1 # intl-thread-locale.m4 serial 8
2 dnl Copyright (C) 2015-2020 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 dnl This file can be used in projects which are not available under
8 dnl the GNU General Public License or the GNU Lesser General Public
9 dnl License but which still want to provide support for the GNU gettext
11 dnl Please note that the actual code of the GNU gettext library is covered
12 dnl by the GNU Lesser General Public License, and the rest of the GNU
13 dnl gettext package is covered by the GNU General Public License.
14 dnl They are *not* in the public domain.
16 dnl Check how to retrieve the name of a per-thread locale (POSIX locale_t).
17 dnl Sets gt_nameless_locales.
18 AC_DEFUN([gt_INTL_THREAD_LOCALE_NAME],
20 AC_REQUIRE([AC_CANONICAL_HOST])
22 dnl Persuade Solaris <locale.h> to define 'locale_t'.
23 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
25 dnl Test whether uselocale() exists and works at all.
28 dnl On OpenBSD >= 6.2, the locale_t type and the uselocale(), newlocale(),
29 dnl duplocale(), freelocale() functions exist but are effectively useless,
30 dnl because the locale_t value depends only on the LC_CTYPE category of the
31 dnl locale and furthermore contains only one bit of information (it
32 dnl distinguishes the "C" locale from the *.UTF-8 locales). See
33 dnl <https://cvsweb.openbsd.org/src/lib/libc/locale/newlocale.c?rev=1.1&content-type=text/x-cvsweb-markup>.
34 dnl In the setlocale() implementation they have thought about the programs
35 dnl that use the API ("Even though only LC_CTYPE has any effect in the
36 dnl OpenBSD base system, store complete information about the global locale,
37 dnl such that third-party software can access it"), but for uselocale()
38 dnl they did not think about the programs.
39 dnl In this situation, even the HAVE_NAMELESS_LOCALES support does not work.
40 dnl So, define HAVE_FAKE_LOCALES and disable all locale_t support.
41 case "$gt_cv_func_uselocale_works" in
43 AC_CHECK_HEADERS_ONCE([xlocale.h])
44 AC_CACHE_CHECK([for fake locale system (OpenBSD)],
55 if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL) return 1;
56 if (setlocale (LC_ALL, "fr_FR.UTF-8") == NULL) return 1;
57 loc1 = newlocale (LC_ALL_MASK, "de_DE.UTF-8", (locale_t)0);
58 loc2 = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", (locale_t)0);
59 return !(loc1 == loc2);
61 [gt_cv_locale_fake=yes],
62 [gt_cv_locale_fake=no],
63 [dnl Guess the locale system is fake only on OpenBSD.
65 openbsd*) gt_cv_locale_fake="guessing yes" ;;
66 *) gt_cv_locale_fake="guessing no" ;;
71 *) gt_cv_locale_fake=no ;;
73 case "$gt_cv_locale_fake" in
75 AC_DEFINE([HAVE_FAKE_LOCALES], [1],
76 [Define if the locale_t type contains insufficient information, as on OpenBSD.])
80 case "$gt_cv_func_uselocale_works" in
82 AC_CACHE_CHECK([for Solaris 11.4 locale system],
83 [gt_cv_locale_solaris114],
86 dnl Test whether <locale.h> defines locale_t as a typedef of
87 dnl 'struct _LC_locale_t **' (whereas Illumos defines it as a
88 dnl typedef of 'struct _locale *').
89 dnl Another possible test would be to include <sys/localedef.h>
90 dnl and test whether it defines the _LC_core_data_locale_t type.
91 dnl This type was added in Solaris 11.4.
95 struct _LC_locale_t *x;
99 [gt_cv_locale_solaris114=yes],
100 [gt_cv_locale_solaris114=no])
102 *) gt_cv_locale_solaris114=no ;;
106 *) gt_cv_locale_solaris114=no ;;
108 if test $gt_cv_locale_solaris114 = yes; then
109 AC_DEFINE([HAVE_SOLARIS114_LOCALES], [1],
110 [Define if the locale_t type is as on Solaris 11.4.])
113 dnl Solaris 12 will maybe provide getlocalename_l. If it does, it will
114 dnl improve the implementation of gl_locale_name_thread(), by removing
115 dnl the use of undocumented structures.
116 case "$gt_cv_func_uselocale_works" in
118 AC_CHECK_FUNCS([getlocalename_l])
122 dnl This code is for platforms where the locale_t type does not provide access
123 dnl to the name of each locale category. This code has the drawback that it
124 dnl requires the gnulib overrides of 'newlocale', 'duplocale', 'freelocale',
125 dnl which is a problem for GNU libunistring. Therefore try hard to avoid
126 dnl enabling this code!
127 gt_nameless_locales=no
129 dnl It's needed on AIX 7.2.
131 gt_nameless_locales=yes
132 AC_DEFINE([HAVE_NAMELESS_LOCALES], [1],
133 [Define if the locale_t type does not contain the name of each locale category.])
138 dnl Tests whether uselocale() exists and is usable.
139 dnl Sets gt_cv_func_uselocale_works. Defines HAVE_WORKING_USELOCALE.
140 AC_DEFUN([gt_FUNC_USELOCALE],
142 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
144 dnl Persuade glibc and Solaris <locale.h> to define 'locale_t'.
145 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
147 AC_CHECK_FUNCS_ONCE([uselocale])
149 dnl On AIX 7.2, the uselocale() function is not documented and leads to
150 dnl crashes in subsequent setlocale() invocations.
151 dnl In 2019, some versions of z/OS lack the locale_t type and have a broken
152 dnl uselocale function.
153 if test $ac_cv_func_uselocale = yes; then
154 AC_CHECK_HEADERS_ONCE([xlocale.h])
155 AC_CACHE_CHECK([whether uselocale works],
156 [gt_cv_func_uselocale_works],
161 # include <xlocale.h>
167 setlocale (LC_ALL, "en_US.UTF-8");
170 [gt_cv_func_uselocale_works=yes],
171 [gt_cv_func_uselocale_works=no],
172 [# Guess no on AIX and z/OS, yes otherwise.
174 aix* | openedition*) gt_cv_func_uselocale_works="guessing no" ;;
175 *) gt_cv_func_uselocale_works="guessing yes" ;;
180 gt_cv_func_uselocale_works=no
182 case "$gt_cv_func_uselocale_works" in
184 AC_DEFINE([HAVE_WORKING_USELOCALE], [1],
185 [Define if the uselocale function exists any may safely be called.])