1 dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
3 dnl Copyright (C) 2006-2008 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.
8 dnl Written by Paul Eggert.
10 AC_DEFUN([gl_WCTYPE_H],
12 AC_REQUIRE([AC_PROG_CC])
13 AC_CHECK_FUNCS_ONCE([iswcntrl])
14 if test $ac_cv_func_iswcntrl = yes; then
19 AC_SUBST([HAVE_ISWCNTRL])
20 AC_CHECK_HEADERS_ONCE([wctype.h])
21 AC_REQUIRE([AC_C_INLINE])
23 AC_REQUIRE([gt_TYPE_WINT_T])
24 if test $gt_cv_c_wint_t = yes; then
29 AC_SUBST([HAVE_WINT_T])
32 if test $ac_cv_header_wctype_h = yes; then
33 if test $ac_cv_func_iswcntrl = yes; then
34 dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
35 dnl The other functions are likely broken in the same way.
36 AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
38 AC_TRY_RUN([#include <stddef.h>
43 int main () { return iswprint ('x') == 0; }],
44 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
47 AC_TRY_COMPILE([#include <stdlib.h>
48 #if __GNU_LIBRARY__ == 1
49 Linux libc5 i18n is broken.
51 [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no])
53 if test $gl_cv_func_iswcntrl_works = yes; then
57 dnl Compute NEXT_WCTYPE_H even if WCTYPE_H is empty,
58 dnl for the benefit of builds from non-distclean directories.
59 gl_CHECK_NEXT_HEADERS([wctype.h])
64 AC_SUBST([HAVE_WCTYPE_H])
67 if test "$gl_cv_func_iswcntrl_works" = no; then
72 AC_SUBST([REPLACE_ISWCNTRL])