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annotate m4/wchar.m4 @ 10932:4d1763d8867c

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New module 'mbsnrtowcs'.
author Bruno Haible <bruno@clisp.org>
date Sun, 21 Dec 2008 14:45:44 +0100
parents c8051e85cbfd
children 197aac315d4d
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708da4ac0ccd Provide a robust <wchar.h>. Further simplifications are now
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1 dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
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3 dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
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4 dnl This file is free software; the Free Software Foundation
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5 dnl gives unlimited permission to copy and/or distribute it,
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6 dnl with or without modifications, as long as this notice is preserved.
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7
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8 dnl Written by Eric Blake.
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9
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4d1763d8867c New module 'mbsnrtowcs'.
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10 # wchar.m4 serial 16
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11
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12 AC_DEFUN([gl_WCHAR_H],
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13 [
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14 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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15 AC_CACHE_CHECK([whether <wchar.h> is standalone],
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16 [gl_cv_header_wchar_h_standalone],
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17 [AC_COMPILE_IFELSE([[#include <wchar.h>
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18 wchar_t w;]],
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19 [gl_cv_header_wchar_h_standalone=yes],
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20 [gl_cv_header_wchar_h_standalone=no])])
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21
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22 AC_REQUIRE([gt_TYPE_WINT_T])
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23 if test $gt_cv_c_wint_t = yes; then
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24 HAVE_WINT_T=1
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25 else
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26 HAVE_WINT_T=0
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27 fi
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28 AC_SUBST([HAVE_WINT_T])
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29
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30 if test $gl_cv_header_wchar_h_standalone != yes || test $gt_cv_c_wint_t != yes; then
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31 WCHAR_H=wchar.h
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32 fi
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33
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34 dnl Prepare for creating substitute <wchar.h>.
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35 dnl Do it always: WCHAR_H may be empty here but can be set later.
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36 dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
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37 dnl character support).
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38 AC_CHECK_HEADERS_ONCE([wchar.h])
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39 if test $ac_cv_header_wchar_h = yes; then
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40 HAVE_WCHAR_H=1
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41 else
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42 HAVE_WCHAR_H=0
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43 fi
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44 AC_SUBST([HAVE_WCHAR_H])
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45 gl_CHECK_NEXT_HEADERS([wchar.h])
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46 ])
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47
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48 dnl Unconditionally enables the replacement of <wchar.h>.
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49 AC_DEFUN([gl_REPLACE_WCHAR_H],
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50 [
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51 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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52 WCHAR_H=wchar.h
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53 ])
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54
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55 AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
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56 [
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57 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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58 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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59 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
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60 ])
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61
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62 AC_DEFUN([gl_WCHAR_H_DEFAULTS],
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63 [
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64 GNULIB_BTOWC=0; AC_SUBST([GNULIB_BTOWC])
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65 GNULIB_WCTOB=0; AC_SUBST([GNULIB_WCTOB])
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66 GNULIB_MBSINIT=0; AC_SUBST([GNULIB_MBSINIT])
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67 GNULIB_MBRTOWC=0; AC_SUBST([GNULIB_MBRTOWC])
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68 GNULIB_MBRLEN=0; AC_SUBST([GNULIB_MBRLEN])
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69 GNULIB_MBSRTOWCS=0; AC_SUBST([GNULIB_MBSRTOWCS])
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70 GNULIB_MBSNRTOWCS=0; AC_SUBST([GNULIB_MBSNRTOWCS])
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71 GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
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72 dnl Assume proper GNU behavior unless another module says otherwise.
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73 HAVE_BTOWC=1; AC_SUBST([HAVE_BTOWC])
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74 HAVE_MBSINIT=1; AC_SUBST([HAVE_MBSINIT])
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75 HAVE_MBRTOWC=1; AC_SUBST([HAVE_MBRTOWC])
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76 HAVE_MBRLEN=1; AC_SUBST([HAVE_MBRLEN])
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77 HAVE_MBSRTOWCS=1; AC_SUBST([HAVE_MBSRTOWCS])
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78 HAVE_MBSNRTOWCS=1; AC_SUBST([HAVE_MBSNRTOWCS])
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79 HAVE_DECL_WCTOB=1; AC_SUBST([HAVE_DECL_WCTOB])
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80 HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
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81 REPLACE_MBSTATE_T=0; AC_SUBST([REPLACE_MBSTATE_T])
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82 REPLACE_WCTOB=0; AC_SUBST([REPLACE_WCTOB])
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83 REPLACE_MBSINIT=0; AC_SUBST([REPLACE_MBSINIT])
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84 REPLACE_MBRTOWC=0; AC_SUBST([REPLACE_MBRTOWC])
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c8051e85cbfd Override mbsrtowcs when redefining mbstate_t.
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85 REPLACE_MBSRTOWCS=0; AC_SUBST([REPLACE_MBSRTOWCS])
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86 REPLACE_MBSNRTOWCS=0;AC_SUBST([REPLACE_MBSNRTOWCS])
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87 REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
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88 WCHAR_H=''; AC_SUBST([WCHAR_H])
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89 ])