1 dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
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.
8 dnl Written by Eric Blake.
12 AC_DEFUN([gl_WCHAR_H],
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>
19 [gl_cv_header_wchar_h_standalone=yes],
20 [gl_cv_header_wchar_h_standalone=no])])
22 AC_REQUIRE([gt_TYPE_WINT_T])
23 if test $gt_cv_c_wint_t = yes; then
28 AC_SUBST([HAVE_WINT_T])
30 if test $gl_cv_header_wchar_h_standalone != yes || test $gt_cv_c_wint_t != yes; then
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
44 AC_SUBST([HAVE_WCHAR_H])
45 gl_CHECK_NEXT_HEADERS([wchar.h])
48 dnl Unconditionally enables the replacement of <wchar.h>.
49 AC_DEFUN([gl_REPLACE_WCHAR_H],
51 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
55 AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
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
62 AC_DEFUN([gl_WCHAR_H_DEFAULTS],
64 GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
65 dnl Assume proper GNU behavior unless another module says otherwise.
66 HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
67 REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
68 WCHAR_H=''; AC_SUBST([WCHAR_H])