1# intl-thread-locale.m4 serial 4 2dnl Copyright (C) 2015-2019 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. 6dnl 7dnl This file can be used in projects which are not available under 8dnl the GNU General Public License or the GNU Library General Public 9dnl License but which still want to provide support for the GNU gettext 10dnl functionality. 11dnl Please note that the actual code of the GNU gettext library is covered 12dnl by the GNU Library General Public License, and the rest of the GNU 13dnl gettext package is covered by the GNU General Public License. 14dnl They are *not* in the public domain. 15 16dnl Check how to retrieve the name of a per-thread locale (POSIX locale_t). 17dnl Sets gt_nameless_locales. 18AC_DEFUN([gt_INTL_THREAD_LOCALE_NAME], 19[ 20 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 21 22 dnl Persuade Solaris <locale.h> to define 'locale_t'. 23 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) 24 25 dnl Test whether uselocale() exists and works at all. 26 gt_FUNC_USELOCALE 27 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 "$gt_cv_func_uselocale_works" in 42 *yes) 43 AC_CHECK_HEADERS_ONCE([xlocale.h]) 44 AC_CACHE_CHECK([for fake locale system (OpenBSD)], 45 [gt_cv_locale_fake], 46 [AC_RUN_IFELSE( 47 [AC_LANG_SOURCE([[ 48#include <locale.h> 49#if HAVE_XLOCALE_H 50# include <xlocale.h> 51#endif 52int main () 53{ 54 locale_t loc1, loc2; 55 if (setlocale (LC_ALL, "de_DE.UTF-8") == NULL) return 1; 56 if (setlocale (LC_ALL, "fr_FR.UTF-8") == NULL) return 1; 57 loc1 = newlocale (LC_ALL_MASK, "de_DE.UTF-8", (locale_t)0); 58 loc2 = newlocale (LC_ALL_MASK, "fr_FR.UTF-8", (locale_t)0); 59 return !(loc1 == loc2); 60}]])], 61 [gt_cv_locale_fake=yes], 62 [gt_cv_locale_fake=no], 63 [dnl Guess the locale system is fake only on OpenBSD. 64 case "$host_os" in 65 openbsd*) gt_cv_locale_fake="guessing yes" ;; 66 *) gt_cv_locale_fake="guessing no" ;; 67 esac 68 ]) 69 ]) 70 ;; 71 *) gt_cv_locale_fake=no ;; 72 esac 73 case "$gt_cv_locale_fake" in 74 *yes) 75 AC_DEFINE([HAVE_FAKE_LOCALES], [1], 76 [Define if the locale_t type contains insufficient information, as on OpenBSD.]) 77 ;; 78 esac 79 80 case "$gt_cv_func_uselocale_works" in 81 *yes) 82 AC_CACHE_CHECK([for Solaris 11.4 locale system], 83 [gt_cv_locale_solaris114], 84 [case "$host_os" in 85 solaris*) 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. 92 AC_COMPILE_IFELSE( 93 [AC_LANG_PROGRAM([[ 94 #include <locale.h> 95 struct _LC_locale_t *x; 96 locale_t y; 97 ]], 98 [[*y = x;]])], 99 [gt_cv_locale_solaris114=yes], 100 [gt_cv_locale_solaris114=no]) 101 ;; 102 *) gt_cv_locale_solaris114=no ;; 103 esac 104 ]) 105 ;; 106 *) gt_cv_locale_solaris114=no ;; 107 esac 108 if test $gt_cv_locale_solaris114 = yes; then 109 AC_DEFINE([HAVE_SOLARIS114_LOCALES], [1], 110 [Define if the locale_t type is as on Solaris 11.4.]) 111 fi 112 113 dnl Solaris 12 will maybe provide getlocalename_l. If it does, it will 114 dnl improve the implementation of gl_locale_name_thread(), by removing 115 dnl the use of undocumented structures. 116 case "$gt_cv_func_uselocale_works" in 117 *yes) 118 AC_CHECK_FUNCS([getlocalename_l]) 119 ;; 120 esac 121 122 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 127 dnl code! 128 gt_nameless_locales=no 129 if false; then 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.]) 133 fi 134]) 135 136dnl Tests whether uselocale() exists and is usable. 137dnl Sets gt_cv_func_uselocale_works. Defines HAVE_WORKING_USELOCALE. 138AC_DEFUN([gt_FUNC_USELOCALE], 139[ 140 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 141 142 dnl Persuade Solaris <locale.h> to define 'locale_t'. 143 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) 144 145 AC_CHECK_FUNCS_ONCE([uselocale]) 146 147 dnl On AIX 7.2, the uselocale() function is not documented and leads to 148 dnl crashes in subsequent setlocale() invocations. 149 if test $ac_cv_func_uselocale = yes; then 150 AC_CHECK_HEADERS_ONCE([xlocale.h]) 151 AC_CACHE_CHECK([whether uselocale works], 152 [gt_cv_func_uselocale_works], 153 [AC_RUN_IFELSE( 154 [AC_LANG_SOURCE([[ 155#include <locale.h> 156#if HAVE_XLOCALE_H 157# include <xlocale.h> 158#endif 159int main () 160{ 161 uselocale (NULL); 162 setlocale (LC_ALL, "en_US.UTF-8"); 163 return 0; 164}]])], 165 [gt_cv_func_uselocale_works=yes], 166 [gt_cv_func_uselocale_works=no], 167 [# Guess no on AIX, yes otherwise. 168 case "$host_os" in 169 aix*) gt_cv_func_uselocale_works="guessing no" ;; 170 *) gt_cv_func_uselocale_works="guessing yes" ;; 171 esac 172 ]) 173 ]) 174 else 175 gt_cv_func_uselocale_works=no 176 fi 177 case "$gt_cv_func_uselocale_works" in 178 *yes) 179 AC_DEFINE([HAVE_WORKING_USELOCALE], [1], 180 [Define if the uselocale function exists any may safely be called.]) 181 ;; 182 esac 183]) 184