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dnl A placeholder for ISO C99 <wchar.h>, for platforms that have issues.
dnl Copyright (C) 2007, 2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl Written by Eric Blake.
# wchar.m4 serial 4
AC_DEFUN([gl_WCHAR_H],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_CACHE_CHECK([whether <wchar.h> is standalone],
[gl_cv_header_wchar_h_standalone],
[AC_COMPILE_IFELSE([[#include <wchar.h>
wchar_t w;]],
[gl_cv_header_wchar_h_standalone=yes],
[gl_cv_header_wchar_h_standalone=no])])
if test $gl_cv_header_wchar_h_standalone != yes; then
WCHAR_H=wchar.h
fi
dnl Prepare for creating substitute <wchar.h>.
dnl Do it always: WCHAR_H may be empty here but can be set later.
dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
dnl character support).
AC_CHECK_HEADERS_ONCE([wchar.h])
if test $ac_cv_header_wchar_h = yes; then
HAVE_WCHAR_H=1
else
HAVE_WCHAR_H=0
fi
AC_SUBST([HAVE_WCHAR_H])
gl_CHECK_NEXT_HEADERS([wchar.h])
])
AC_DEFUN([gl_WCHAR_MODULE_INDICATOR],
[
dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
])
AC_DEFUN([gl_WCHAR_H_DEFAULTS],
[
GNULIB_WCWIDTH=0; AC_SUBST([GNULIB_WCWIDTH])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_DECL_WCWIDTH=1; AC_SUBST([HAVE_DECL_WCWIDTH])
REPLACE_WCWIDTH=0; AC_SUBST([REPLACE_WCWIDTH])
WCHAR_H=
AC_SUBST([WCHAR_H])
])
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