AC_DEFUN([gl_MBSWIDTH],
[
AC_CHECK_HEADERS_ONCE(wchar.h wctype.h)
AC_CHECK_FUNCS_ONCE(isascii iswprint mbsinit)
AC_CHECK_FUNCS(iswcntrl wcwidth)
jm_FUNC_MBRTOWC
AC_CACHE_CHECK([whether wcwidth is declared], ac_cv_have_decl_wcwidth,
[AC_TRY_COMPILE([
/* AIX 3.2.5 declares wcwidth in <string.h>. */
], [
char *p = (char *) wcwidth;
], ac_cv_have_decl_wcwidth=yes, ac_cv_have_decl_wcwidth=no)])
if test $ac_cv_have_decl_wcwidth = yes; then
ac_val=1
else
ac_val=0
fi
AC_DEFINE_UNQUOTED(HAVE_DECL_WCWIDTH, $ac_val,
[Define to 1 if you have the declaration of wcwidth(), and to 0 otherwise.])
AC_MBSTATE_T
])