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# langinfo_h.m4 serial 12
dnl Copyright (C) 2009-2024 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_ONCE([gl_LANGINFO_H],
[
AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
dnl Persuade glibc-2.0.6 <langinfo.h> to define CODESET.
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
dnl <langinfo.h> is always overridden, because of GNULIB_POSIXCHECK.
gl_CHECK_NEXT_HEADERS([langinfo.h])
dnl Determine whether <langinfo.h> exists. It is missing on mingw and BeOS.
HAVE_LANGINFO_CODESET=0
HAVE_LANGINFO_T_FMT_AMPM=0
HAVE_LANGINFO_ALTMON=0
HAVE_LANGINFO_ERA=0
HAVE_LANGINFO_YESEXPR=0
AC_CHECK_HEADERS_ONCE([langinfo.h])
if test $ac_cv_header_langinfo_h = yes; then
HAVE_LANGINFO_H=1
dnl Determine what <langinfo.h> defines.
dnl CODESET is missing on OpenBSD 3.8.
dnl ERA etc. are missing on OpenBSD 6.7.
dnl T_FMT_AMPM and YESEXPR, NOEXPR are missing on IRIX 5.3.
dnl ALTMON_* are missing on glibc 2.26 and many other systems.
AC_CACHE_CHECK([whether langinfo.h defines CODESET],
[gl_cv_header_langinfo_codeset],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <langinfo.h>
int a = CODESET;
]])],
[gl_cv_header_langinfo_codeset=yes],
[gl_cv_header_langinfo_codeset=no])
])
if test $gl_cv_header_langinfo_codeset = yes; then
HAVE_LANGINFO_CODESET=1
fi
AC_CACHE_CHECK([whether langinfo.h defines T_FMT_AMPM],
[gl_cv_header_langinfo_t_fmt_ampm],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <langinfo.h>
int a = T_FMT_AMPM;
]])],
[gl_cv_header_langinfo_t_fmt_ampm=yes],
[gl_cv_header_langinfo_t_fmt_ampm=no])
])
if test $gl_cv_header_langinfo_t_fmt_ampm = yes; then
HAVE_LANGINFO_T_FMT_AMPM=1
fi
AC_CACHE_CHECK([whether langinfo.h defines ALTMON_1],
[gl_cv_header_langinfo_altmon],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <langinfo.h>
int a = ALTMON_1;
]])],
[gl_cv_header_langinfo_altmon=yes],
[gl_cv_header_langinfo_altmon=no])
])
if test $gl_cv_header_langinfo_altmon = yes; then
HAVE_LANGINFO_ALTMON=1
fi
AC_CACHE_CHECK([whether langinfo.h defines ERA],
[gl_cv_header_langinfo_era],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <langinfo.h>
int a = ERA;
]])],
[gl_cv_header_langinfo_era=yes],
[gl_cv_header_langinfo_era=no])
])
if test $gl_cv_header_langinfo_era = yes; then
HAVE_LANGINFO_ERA=1
fi
AC_CACHE_CHECK([whether langinfo.h defines YESEXPR],
[gl_cv_header_langinfo_yesexpr],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <langinfo.h>
int a = YESEXPR;
]])],
[gl_cv_header_langinfo_yesexpr=yes],
[gl_cv_header_langinfo_yesexpr=no])
])
if test $gl_cv_header_langinfo_yesexpr = yes; then
HAVE_LANGINFO_YESEXPR=1
fi
else
HAVE_LANGINFO_H=0
fi
AC_SUBST([HAVE_LANGINFO_H])
AC_SUBST([HAVE_LANGINFO_CODESET])
AC_SUBST([HAVE_LANGINFO_T_FMT_AMPM])
AC_SUBST([HAVE_LANGINFO_ALTMON])
AC_SUBST([HAVE_LANGINFO_ERA])
AC_SUBST([HAVE_LANGINFO_YESEXPR])
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[#include <langinfo.h>
]], [nl_langinfo])
])
# gl_LANGINFO_MODULE_INDICATOR([modulename])
# sets the shell variable that indicates the presence of the given module
# to a C preprocessor expression that will evaluate to 1.
# This macro invocation must not occur in macros that are AC_REQUIREd.
AC_DEFUN([gl_LANGINFO_MODULE_INDICATOR],
[
dnl Ensure to expand the default settings once only.
gl_LANGINFO_H_REQUIRE_DEFAULTS
gl_MODULE_INDICATOR_SET_VARIABLE([$1])
dnl Define it also as a C macro, for the benefit of the unit tests.
gl_MODULE_INDICATOR_FOR_TESTS([$1])
])
# Initializes the default values for AC_SUBSTed shell variables.
# This macro must not be AC_REQUIREd. It must only be invoked, and only
# outside of macros or in macros that are not AC_REQUIREd.
AC_DEFUN([gl_LANGINFO_H_REQUIRE_DEFAULTS],
[
m4_defun(GL_MODULE_INDICATOR_PREFIX[_LANGINFO_H_MODULE_INDICATOR_DEFAULTS], [
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_NL_LANGINFO])
])
m4_require(GL_MODULE_INDICATOR_PREFIX[_LANGINFO_H_MODULE_INDICATOR_DEFAULTS])
AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
])
AC_DEFUN([gl_LANGINFO_H_DEFAULTS],
[
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_NL_LANGINFO=1; AC_SUBST([HAVE_NL_LANGINFO])
REPLACE_NL_LANGINFO=0; AC_SUBST([REPLACE_NL_LANGINFO])
])
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