1# langinfo_h.m4 serial 7
2dnl Copyright (C) 2009-2014 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_ERA=0
21  HAVE_LANGINFO_YESEXPR=0
22  AC_CHECK_HEADERS_ONCE([langinfo.h])
23  if test $ac_cv_header_langinfo_h = yes; then
24    HAVE_LANGINFO_H=1
25    dnl Determine what <langinfo.h> defines. CODESET and ERA etc. are missing
26    dnl on OpenBSD 3.8. T_FMT_AMPM and YESEXPR, NOEXPR are missing on IRIX 5.3.
27    AC_CACHE_CHECK([whether langinfo.h defines CODESET],
28      [gl_cv_header_langinfo_codeset],
29      [AC_COMPILE_IFELSE(
30         [AC_LANG_PROGRAM([[#include <langinfo.h>
31int a = CODESET;
32]])],
33         [gl_cv_header_langinfo_codeset=yes],
34         [gl_cv_header_langinfo_codeset=no])
35      ])
36    if test $gl_cv_header_langinfo_codeset = yes; then
37      HAVE_LANGINFO_CODESET=1
38    fi
39    AC_CACHE_CHECK([whether langinfo.h defines T_FMT_AMPM],
40      [gl_cv_header_langinfo_t_fmt_ampm],
41      [AC_COMPILE_IFELSE(
42         [AC_LANG_PROGRAM([[#include <langinfo.h>
43int a = T_FMT_AMPM;
44]])],
45         [gl_cv_header_langinfo_t_fmt_ampm=yes],
46         [gl_cv_header_langinfo_t_fmt_ampm=no])
47      ])
48    if test $gl_cv_header_langinfo_t_fmt_ampm = yes; then
49      HAVE_LANGINFO_T_FMT_AMPM=1
50    fi
51    AC_CACHE_CHECK([whether langinfo.h defines ERA],
52      [gl_cv_header_langinfo_era],
53      [AC_COMPILE_IFELSE(
54         [AC_LANG_PROGRAM([[#include <langinfo.h>
55int a = ERA;
56]])],
57         [gl_cv_header_langinfo_era=yes],
58         [gl_cv_header_langinfo_era=no])
59      ])
60    if test $gl_cv_header_langinfo_era = yes; then
61      HAVE_LANGINFO_ERA=1
62    fi
63    AC_CACHE_CHECK([whether langinfo.h defines YESEXPR],
64      [gl_cv_header_langinfo_yesexpr],
65      [AC_COMPILE_IFELSE(
66         [AC_LANG_PROGRAM([[#include <langinfo.h>
67int a = YESEXPR;
68]])],
69         [gl_cv_header_langinfo_yesexpr=yes],
70         [gl_cv_header_langinfo_yesexpr=no])
71      ])
72    if test $gl_cv_header_langinfo_yesexpr = yes; then
73      HAVE_LANGINFO_YESEXPR=1
74    fi
75  else
76    HAVE_LANGINFO_H=0
77  fi
78  AC_SUBST([HAVE_LANGINFO_H])
79  AC_SUBST([HAVE_LANGINFO_CODESET])
80  AC_SUBST([HAVE_LANGINFO_T_FMT_AMPM])
81  AC_SUBST([HAVE_LANGINFO_ERA])
82  AC_SUBST([HAVE_LANGINFO_YESEXPR])
83
84  dnl Check for declarations of anything we want to poison if the
85  dnl corresponding gnulib module is not in use.
86  gl_WARN_ON_USE_PREPARE([[#include <langinfo.h>
87    ]], [nl_langinfo])
88])
89
90AC_DEFUN([gl_LANGINFO_MODULE_INDICATOR],
91[
92  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
93  AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])
94  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
95  dnl Define it also as a C macro, for the benefit of the unit tests.
96  gl_MODULE_INDICATOR_FOR_TESTS([$1])
97])
98
99AC_DEFUN([gl_LANGINFO_H_DEFAULTS],
100[
101  GNULIB_NL_LANGINFO=0;  AC_SUBST([GNULIB_NL_LANGINFO])
102  dnl Assume proper GNU behavior unless another module says otherwise.
103  HAVE_NL_LANGINFO=1;    AC_SUBST([HAVE_NL_LANGINFO])
104  REPLACE_NL_LANGINFO=0; AC_SUBST([REPLACE_NL_LANGINFO])
105])
106