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# wcstok.m4 serial 5
dnl Copyright (C) 2011-2020 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.
AC_DEFUN([gl_FUNC_WCSTOK],
[
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS_ONCE([wcstok])
if test $ac_cv_func_wcstok = yes; then
dnl On HP-UX 11.31, it depends on the compiler and linker whether wcstok()
dnl uses hidden state, ignoring the third argument, and thus exhibits a
dnl bug when two or more wcstok() iteration loops are being performed in
dnl the same thread.
case "$host_os" in
hpux*)
REPLACE_WCSTOK=1
;;
*)
dnl POSIX: wchar_t *wcstok (wchar_t *, const wchar_t *, wchar_t **);
dnl mingw, MSVC: wchar_t *wcstok (wchar_t *, const wchar_t *);
AC_CACHE_CHECK([for wcstok with POSIX signature],
[gl_cv_func_wcstok_posix_signature],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
<wchar.h>.
BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
included before <wchar.h>. */
#include <stddef.h>
#include <stdio.h>
#include <time.h>
#include <wchar.h>
wchar_t *wcstok (wchar_t *, const wchar_t *, wchar_t **);
]],
[[]])],
[gl_cv_func_wcstok_posix_signature=yes],
[gl_cv_func_wcstok_posix_signature=no])
])
if test $gl_cv_func_wcstok_posix_signature = no; then
REPLACE_WCSTOK=1
fi
;;
esac
else
HAVE_WCSTOK=0
fi
])
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