1 # intl-thread-locale.m4 serial 4
2 dnl Copyright (C) 2015-2019 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 Library 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 Library 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]) dnl for cross-compiles
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 future use, in case we some day have to port to a
123 dnl platform where the locale_t type does not provide access to the name of
124 dnl each locale category. This code has the drawback that it requires the
125 dnl gnulib overrides of 'newlocale', 'duplocale', 'freelocale', which is a
126 dnl problem for GNU libunistring. Therefore try hard to avoid enabling this
128 gt_nameless_locales=no
130 gt_nameless_locales=yes
131 AC_DEFINE([HAVE_NAMELESS_LOCALES], [1],
132 [Define if the locale_t type does not contain the name of each locale category.])
136 dnl Tests whether uselocale() exists and is usable.
137 dnl Sets gt_cv_func_uselocale_works. Defines HAVE_WORKING_USELOCALE.
138 AC_DEFUN([gt_FUNC_USELOCALE],
140 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
142 dnl Persuade Solaris <locale.h> to define 'locale_t'.
143 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
145 AC_CHECK_FUNCS_ONCE([uselocale])
147 dnl On AIX 7.2, the uselocale() function is not documented and leads to
148 dnl crashes in subsequent setlocale() invocations.
149 if test $ac_cv_func_uselocale = yes; then
150 AC_CHECK_HEADERS_ONCE([xlocale.h])
151 AC_CACHE_CHECK([whether uselocale works],
152 [gt_cv_func_uselocale_works],
157 # include <xlocale.h>
162 setlocale (LC_ALL, "en_US.UTF-8");
165 [gt_cv_func_uselocale_works=yes],
166 [gt_cv_func_uselocale_works=no],
167 [# Guess no on AIX, yes otherwise.
169 aix*) gt_cv_func_uselocale_works="guessing no" ;;
170 *) gt_cv_func_uselocale_works="guessing yes" ;;
175 gt_cv_func_uselocale_works=no
177 case "$gt_cv_func_uselocale_works" in
179 AC_DEFINE([HAVE_WORKING_USELOCALE], [1],
180 [Define if the uselocale function exists any may safely be called.])