1# langinfo_h.m4 serial 8
2dnl Copyright (C) 2009-2020 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.
6
7AC_DEFUN([gl_LANGINFO_H],
8[
9  AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
10
11  dnl Persuade glibc-2.0.6 <langinfo.h> to define CODESET.
12  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
13
14  dnl <langinfo.h> is always overridden, because of GNULIB_POSIXCHECK.
15  gl_CHECK_NEXT_HEADERS([langinfo.h])
16
17  dnl Determine whether <langinfo.h> exists. It is missing on mingw and BeOS.
18  HAVE_LANGINFO_CODESET=0
19  HAVE_LANGINFO_T_FMT_AMPM=0
20  HAVE_LANGINFO_ALTMON=0
21  HAVE_LANGINFO_ERA=0
22  HAVE_LANGINFO_YESEXPR=0
23  AC_CHECK_HEADERS_ONCE([langinfo.h])
24  if test $ac_cv_header_langinfo_h = yes; then
25    HAVE_LANGINFO_H=1
26    dnl Determine what <langinfo.h> defines. CODESET and ERA etc. are missing
27    dnl on OpenBSD 3.8. T_FMT_AMPM and YESEXPR, NOEXPR are missing on IRIX 5.3.
28    dnl ALTMON_* are missing on glibc 2.26 and many other systems.
29    AC_CACHE_CHECK([whether langinfo.h defines CODESET],
30      [gl_cv_header_langinfo_codeset],
31      [AC_COMPILE_IFELSE(
32         [AC_LANG_PROGRAM([[#include <langinfo.h>
33int a = CODESET;
34]])],
35         [gl_cv_header_langinfo_codeset=yes],
36         [gl_cv_header_langinfo_codeset=no])
37      ])
38    if test $gl_cv_header_langinfo_codeset = yes; then
39      HAVE_LANGINFO_CODESET=1
40    fi
41    AC_CACHE_CHECK([whether langinfo.h defines T_FMT_AMPM],
42      [gl_cv_header_langinfo_t_fmt_ampm],
43      [AC_COMPILE_IFELSE(
44         [AC_LANG_PROGRAM([[#include <langinfo.h>
45int a = T_FMT_AMPM;
46]])],
47         [gl_cv_header_langinfo_t_fmt_ampm=yes],
48         [gl_cv_header_langinfo_t_fmt_ampm=no])
49      ])
50    if test $gl_cv_header_langinfo_t_fmt_ampm = yes; then
51      HAVE_LANGINFO_T_FMT_AMPM=1
52    fi
53    AC_CACHE_CHECK([whether langinfo.h defines ALTMON_1],
54      [gl_cv_header_langinfo_altmon],
55      [AC_COMPILE_IFELSE(
56         [AC_LANG_PROGRAM([[#include <langinfo.h>
57int a = ALTMON_1;
58]])],
59         [gl_cv_header_langinfo_altmon=yes],
60         [gl_cv_header_langinfo_altmon=no])
61      ])
62    if test $gl_cv_header_langinfo_altmon = yes; then
63      HAVE_LANGINFO_ALTMON=1
64    fi
65    AC_CACHE_CHECK([whether langinfo.h defines ERA],
66      [gl_cv_header_langinfo_era],
67      [AC_COMPILE_IFELSE(
68         [AC_LANG_PROGRAM([[#include <langinfo.h>
69int a = ERA;
70]])],
71         [gl_cv_header_langinfo_era=yes],
72         [gl_cv_header_langinfo_era=no])
73      ])
74    if test $gl_cv_header_langinfo_era = yes; then
75      HAVE_LANGINFO_ERA=1
76    fi
77    AC_CACHE_CHECK([whether langinfo.h defines YESEXPR],
78      [gl_cv_header_langinfo_yesexpr],
79      [AC_COMPILE_IFELSE(
80         [AC_LANG_PROGRAM([[#include <langinfo.h>
81int a = YESEXPR;
82]])],
83         [gl_cv_header_langinfo_yesexpr=yes],
84         [gl_cv_header_langinfo_yesexpr=no])
85      ])
86    if test $gl_cv_header_langinfo_yesexpr = yes; then
87      HAVE_LANGINFO_YESEXPR=1
88    fi
89  else
90    HAVE_LANGINFO_H=0
91  fi
92  AC_SUBST([HAVE_LANGINFO_H])
93  AC_SUBST([HAVE_LANGINFO_CODESET])
94  AC_SUBST([HAVE_LANGINFO_T_FMT_AMPM])
95  AC_SUBST([HAVE_LANGINFO_ALTMON])
96  AC_SUBST([HAVE_LANGINFO_ERA])
97  AC_SUBST([HAVE_LANGINFO_YESEXPR])
98
99  dnl Check for declarations of anything we want to poison if the
100  dnl corresponding gnulib module is not in use.
101  gl_WARN_ON_USE_PREPARE([[#include <langinfo.h>
102    ]], [nl_langinfo])
103])
104
105AC_DEFUN([gl_LANGINFO_MODULE_INDICATOR],
106[
107  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
108  AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
109  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
110  dnl Define it also as a C macro, for the benefit of the unit tests.
111  gl_MODULE_INDICATOR_FOR_TESTS([$1])
112])
113
114AC_DEFUN([gl_LANGINFO_H_DEFAULTS],
115[
116  GNULIB_NL_LANGINFO=0;  AC_SUBST([GNULIB_NL_LANGINFO])
117  dnl Assume proper GNU behavior unless another module says otherwise.
118  HAVE_NL_LANGINFO=1;    AC_SUBST([HAVE_NL_LANGINFO])
119  REPLACE_NL_LANGINFO=0; AC_SUBST([REPLACE_NL_LANGINFO])
120])
121