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-rw-r--r--m4/langinfo_h.m4137
1 files changed, 137 insertions, 0 deletions
diff --git a/m4/langinfo_h.m4 b/m4/langinfo_h.m4
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+++ b/m4/langinfo_h.m4
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+# langinfo_h.m4 serial 12
+dnl Copyright (C) 2009-2022 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])
+])