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comparison m4/wchar.m4 @ 272:d5392bb5da3c 2.5

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date Sun, 16 Aug 2009 17:16:49 +0000
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271:3b793ba7a6c6 272:d5392bb5da3c
1 dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
2
3 dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
7
8 dnl Written by Eric Blake.
9
10 # wchar.m4 serial 22
11
12 AC_DEFUN([gl_WCHAR_H],
13 [
14 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
15 AC_CACHE_CHECK([whether <wchar.h> is standalone],
16 [gl_cv_header_wchar_h_standalone],
17 [AC_COMPILE_IFELSE([[#include <wchar.h>
18 wchar_t w;]],
19 [gl_cv_header_wchar_h_standalone=yes],
20 [gl_cv_header_wchar_h_standalone=no])])
21
22 AC_REQUIRE([gt_TYPE_WINT_T])
23 if test $gt_cv_c_wint_t = yes; then
24 HAVE_WINT_T=1
25 else
26 HAVE_WINT_T=0
27 fi
28 AC_SUBST([HAVE_WINT_T])
29
30 if test $gl_cv_header_wchar_h_standalone != yes || test $gt_cv_c_wint_t != yes; then
31 WCHAR_H=wchar.h
32 fi
33
34 dnl Prepare for creating substitute <wchar.h>.
35 dnl Do it always: WCHAR_H may be empty here but can be set later.
36 dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
37 dnl character support).
38 AC_CHECK_HEADERS_ONCE([wchar.h])
39 if test $ac_cv_header_wchar_h = yes; then
40 HAVE_WCHAR_H=1
41 else
42 HAVE_WCHAR_H=0
43 fi
44 AC_SUBST([HAVE_WCHAR_H])
45 gl_CHECK_NEXT_HEADERS([wchar.h])
46 ])
47
48 dnl Unconditionally enables the replacement of <wchar.h>.
49 AC_DEFUN([gl_REPLACE_WCHAR_H],
50 [
51 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
52 WCHAR_H=wchar.h
53 ])
54
55 AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
56 [
57 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
58 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
59 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
60 ])
61
62 AC_DEFUN([gl_WCHAR_H_DEFAULTS],
63 [
64 GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC])
65 GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB])
66 GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT])
67 GNULIB_MBRTOWC=0; AC_SUBST([GNULIB_MBRTOWC])
68 GNULIB_MBRLEN=0; AC_SUBST([GNULIB_MBRLEN])
69 GNULIB_MBSRTOWCS=0; AC_SUBST([GNULIB_MBSRTOWCS])
70 GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS])
71 GNULIB_WCRTOMB=0; AC_SUBST([GNULIB_WCRTOMB])
72 GNULIB_WCSRTOMBS=0; AC_SUBST([GNULIB_WCSRTOMBS])
73 GNULIB_WCSNRTOMBS=0; AC_SUBST([GNULIB_WCSNRTOMBS])
74 GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
75 dnl Assume proper GNU behavior unless another module says otherwise.
76 HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
77 HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
78 HAVE_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC])
79 HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN])
80 HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS])
81 HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS])
82 HAVE_WCRTOMB=1; AC_SUBST([HAVE_WCRTOMB])
83 HAVE_WCSRTOMBS=1; AC_SUBST([HAVE_WCSRTOMBS])
84 HAVE_WCSNRTOMBS=1; AC_SUBST([HAVE_WCSNRTOMBS])
85 HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
86 HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
87 REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T])
88 REPLACE_BTOWC=0; AC_SUBST([REPLACE_BTOWC])
89 REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB])
90 REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT])
91 REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
92 REPLACE_MBRLEN=0; AC_SUBST([REPLACE_MBRLEN])
93 REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
94 REPLACE_MBSNRTOWCS=0;AC_SUBST([REPLACE_MBSNRTOWCS])
95 REPLACE_WCRTOMB=0; AC_SUBST([REPLACE_WCRTOMB])
96 REPLACE_WCSRTOMBS=0; AC_SUBST([REPLACE_WCSRTOMBS])
97 REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
98 WCHAR_H=''; AC_SUBST([WCHAR_H])
99 ])