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+# wint_t.m4 serial 11
+dnl Copyright (C) 2003, 2007-2022 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
+ GNULIBHEADERS_OVERRIDE_WINT_T=1
+ else
+ GNULIBHEADERS_OVERRIDE_WINT_T=0
+ fi
+ else
+ GNULIBHEADERS_OVERRIDE_WINT_T=0
+ fi
+ AC_SUBST([GNULIBHEADERS_OVERRIDE_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])
+])