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# duplocale.m4 serial 9
dnl Copyright (C) 2009-2017 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_DUPLOCALE],
[
AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([duplocale])
if test $ac_cv_func_duplocale = yes; then
dnl Check against glibc bug where duplocale crashes.
dnl See <https://sourceware.org/bugzilla/show_bug.cgi?id=10969>.
dnl Also, on AIX 7.1, duplocale(LC_GLOBAL_LOCALE) returns (locale_t)0 with
dnl errno set to EINVAL.
dnl Also, on NetBSD 7.0, duplocale(LC_GLOBAL_LOCALE) returns a locale that
dnl corresponds to the C locale.
AC_REQUIRE([gl_LOCALE_H])
AC_CHECK_FUNCS_ONCE([snprintf_l nl_langinfo_l])
AC_CACHE_CHECK([whether duplocale(LC_GLOBAL_LOCALE) works],
[gl_cv_func_duplocale_works],
[AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <locale.h>
#if HAVE_XLOCALE_H
# include <xlocale.h>
#endif
#if HAVE_SNPRINTF_L
# include <stdio.h>
#endif
#if HAVE_NL_LANGINFO_L
# include <langinfo.h>
#endif
#include <string.h>
struct locale_dependent_values
{
char numeric[100];
char time[100];
};
int main ()
{
struct locale_dependent_values expected_result;
struct locale_dependent_values result;
locale_t loc;
setlocale (LC_ALL, "en_US.UTF-8");
setlocale (LC_NUMERIC, "de_DE.UTF-8");
setlocale (LC_TIME, "fr_FR.UTF-8");
#if HAVE_SNPRINTF_L
snprintf (expected_result.numeric, sizeof (expected_result.numeric), "%g", 3.5);
#endif
#if HAVE_NL_LANGINFO_L
strcpy (expected_result.time, nl_langinfo (MON_1));
#endif
loc = duplocale (LC_GLOBAL_LOCALE);
if (!loc)
return 1;
#if HAVE_SNPRINTF_L
snprintf_l (result.numeric, sizeof (result.numeric), loc, "%g", 3.5);
#endif
#if HAVE_NL_LANGINFO_L
strcpy (result.time, nl_langinfo_l (MON_1, loc));
#endif
#if HAVE_SNPRINTF_L
if (strcmp (result.numeric, expected_result.numeric) != 0)
return 2;
#endif
#if HAVE_NL_LANGINFO_L
if (strcmp (result.time, expected_result.time) != 0)
return 3;
#endif
freelocale (loc);
return 0;
}]])],
[gl_cv_func_duplocale_works=yes],
[gl_cv_func_duplocale_works=no],
[dnl Guess it works except on glibc < 2.12, uClibc, AIX, and NetBSD.
case "$host_os" in
aix* | netbsd*) gl_cv_func_duplocale_works="guessing no";;
*-gnu*)
AC_EGREP_CPP([Unlucky], [
#include <features.h>
#ifdef __GNU_LIBRARY__
#if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)
Unlucky GNU user
#endif
#endif
#ifdef __UCLIBC__
Unlucky user
#endif
],
[gl_cv_func_duplocale_works="guessing no"],
[gl_cv_func_duplocale_works="guessing yes"])
;;
*) gl_cv_func_duplocale_works="guessing yes";;
esac
])
])
case "$gl_cv_func_duplocale_works" in
*no) REPLACE_DUPLOCALE=1 ;;
esac
else
HAVE_DUPLOCALE=0
fi
])
# Prerequisites of lib/duplocale.c.
AC_DEFUN([gl_PREREQ_DUPLOCALE],
[
:
])
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