1 # wctype_h.m4 serial 12
3 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
5 dnl Copyright (C) 2006-2011 Free Software Foundation, Inc.
6 dnl This file is free software; the Free Software Foundation
7 dnl gives unlimited permission to copy and/or distribute it,
8 dnl with or without modifications, as long as this notice is preserved.
10 dnl Written by Paul Eggert.
12 AC_DEFUN([gl_WCTYPE_H],
14 AC_REQUIRE([AC_PROG_CC])
15 AC_REQUIRE([AC_CANONICAL_HOST])
16 AC_CHECK_FUNCS_ONCE([iswcntrl])
17 if test $ac_cv_func_iswcntrl = yes; then
22 AC_SUBST([HAVE_ISWCNTRL])
23 AC_CHECK_FUNCS_ONCE([iswblank])
24 AC_CHECK_DECLS_ONCE([iswblank])
25 if test $ac_cv_func_iswblank = yes; then
30 if test $ac_cv_have_decl_iswblank = yes; then
36 AC_SUBST([HAVE_ISWBLANK])
37 AC_SUBST([REPLACE_ISWBLANK])
39 AC_REQUIRE([AC_C_INLINE])
41 AC_REQUIRE([gt_TYPE_WINT_T])
42 if test $gt_cv_c_wint_t = yes; then
47 AC_SUBST([HAVE_WINT_T])
49 gl_CHECK_NEXT_HEADERS([wctype.h])
50 if test $ac_cv_header_wctype_h = yes; then
51 if test $ac_cv_func_iswcntrl = yes; then
52 dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
53 dnl The other functions are likely broken in the same way.
54 AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
58 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be
59 included before <wchar.h>.
60 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h>
61 must be included before <wchar.h>. */
67 int main () { return iswprint ('x') == 0; }
69 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
70 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
71 #if __GNU_LIBRARY__ == 1
72 Linux libc5 i18n is broken.
74 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
82 AC_SUBST([HAVE_WCTYPE_H])
84 if test "$gl_cv_func_iswcntrl_works" = no; then
89 AC_SUBST([REPLACE_ISWCNTRL])
91 if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
92 dnl Redefine all of iswcntrl, ..., towupper in <wctype.h>.
95 if test $HAVE_ISWBLANK = 0 || test $REPLACE_ISWBLANK = 1; then
96 dnl Redefine only iswblank.