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# wint_t.m4 serial 10
dnl Copyright (C) 2003, 2007-2020 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 From Bruno Haible.
dnl Test whether <wchar.h> has the 'wint_t' type and whether gnulib's
dnl <wchar.h> or <wctype.h> would, if present, override 'wint_t'.
dnl Prerequisite: AC_PROG_CC
AC_DEFUN([gt_TYPE_WINT_T],
[
AC_CACHE_CHECK([for wint_t], [gt_cv_c_wint_t],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <wchar.h>
wint_t foo = (wchar_t)'\0';]],
[[]])],
[gt_cv_c_wint_t=yes],
[gt_cv_c_wint_t=no])])
if test $gt_cv_c_wint_t = yes; then
AC_DEFINE([HAVE_WINT_T], [1], [Define if you have the 'wint_t' type.])
dnl Determine whether gnulib's <wchar.h> or <wctype.h> would, if present,
dnl override 'wint_t'.
AC_CACHE_CHECK([whether wint_t is large enough],
[gl_cv_type_wint_t_large_enough],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <wchar.h>
int verify[sizeof (wint_t) < sizeof (int) ? -1 : 1];
]])],
[gl_cv_type_wint_t_large_enough=yes],
[gl_cv_type_wint_t_large_enough=no])])
if test $gl_cv_type_wint_t_large_enough = no; then
GNULIB_OVERRIDES_WINT_T=1
else
GNULIB_OVERRIDES_WINT_T=0
fi
else
GNULIB_OVERRIDES_WINT_T=0
fi
AC_SUBST([GNULIB_OVERRIDES_WINT_T])
])
dnl Prerequisites of the 'wint_t' override.
AC_DEFUN([gl_TYPE_WINT_T_PREREQ],
[
AC_CHECK_HEADERS_ONCE([crtdefs.h])
if test $ac_cv_header_crtdefs_h = yes; then
HAVE_CRTDEFS_H=1
else
HAVE_CRTDEFS_H=0
fi
AC_SUBST([HAVE_CRTDEFS_H])
])
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