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-rw-r--r--m4/duplocale.m4130
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diff --git a/m4/duplocale.m4 b/m4/duplocale.m4
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+# duplocale.m4 serial 14
+dnl Copyright (C) 2009-2023 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_REQUIRE([gl_FUNC_SETLOCALE_NULL])
+ 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])
+ if test $HAVE_LOCALE_T = 1; then
+ AC_CHECK_FUNCS_ONCE([snprintf_l nl_langinfo_l])
+ AC_CACHE_CHECK([whether duplocale(LC_GLOBAL_LOCALE) works],
+ [gl_cv_func_duplocale_works],
+ [AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <locale.h>
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+#if HAVE_SNPRINTF_L
+# include <stdio.h>
+#endif
+#if HAVE_NL_LANGINFO_L
+# include <langinfo.h>
+#endif
+#include <string.h>
+struct locale_dependent_values
+{
+ char numeric[100];
+ char time[100];
+};
+int main ()
+{
+ struct locale_dependent_values expected_result;
+ struct locale_dependent_values result;
+ locale_t loc;
+ setlocale (LC_ALL, "en_US.UTF-8");
+ setlocale (LC_NUMERIC, "de_DE.UTF-8");
+ setlocale (LC_TIME, "fr_FR.UTF-8");
+#if HAVE_SNPRINTF_L
+ snprintf (expected_result.numeric, sizeof (expected_result.numeric), "%g", 3.5);
+#endif
+#if HAVE_NL_LANGINFO_L
+ strcpy (expected_result.time, nl_langinfo (MON_1));
+#endif
+ loc = duplocale (LC_GLOBAL_LOCALE);
+ if (!loc)
+ return 1;
+#if HAVE_SNPRINTF_L
+ snprintf_l (result.numeric, sizeof (result.numeric), loc, "%g", 3.5);
+#endif
+#if HAVE_NL_LANGINFO_L
+ strcpy (result.time, nl_langinfo_l (MON_1, loc));
+#endif
+#if HAVE_SNPRINTF_L
+ if (strcmp (result.numeric, expected_result.numeric) != 0)
+ return 2;
+#endif
+#if HAVE_NL_LANGINFO_L
+ if (strcmp (result.time, expected_result.time) != 0)
+ return 3;
+#endif
+ freelocale (loc);
+ return 0;
+}]])],
+ [gl_cv_func_duplocale_works=yes],
+ [gl_cv_func_duplocale_works=no],
+ [dnl Guess it works except on glibc < 2.12, uClibc, AIX, and NetBSD.
+ case "$host_os" in
+ aix* | netbsd*) gl_cv_func_duplocale_works="guessing no";;
+ *-gnu* | 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
+ dnl In 2019, some versions of z/OS lack the locale_t type and have broken
+ dnl newlocale, duplocale, freelocale functions. In this situation, we
+ dnl cannot use nor override duplocale.
+ HAVE_DUPLOCALE=0
+ fi
+ else
+ HAVE_DUPLOCALE=0
+ fi
+ if test $REPLACE_DUPLOCALE = 1; then
+ DUPLOCALE_LIB="$SETLOCALE_NULL_LIB"
+ else
+ DUPLOCALE_LIB=
+ fi
+ dnl DUPLOCALE_LIB is expected to be '-pthread' or '-lpthread' on AIX
+ dnl with gcc or xlc, and empty otherwise.
+ AC_SUBST([DUPLOCALE_LIB])
+ dnl For backward compatibility.
+ LIB_DUPLOCALE="$DUPLOCALE_LIB"
+ AC_SUBST([LIB_DUPLOCALE])
+])
+
+# Prerequisites of lib/duplocale.c.
+AC_DEFUN([gl_PREREQ_DUPLOCALE],
+[
+ :
+])