+AC_CHECK_SIZEOF([signed char], 0)
+if test "$ac_cv_sizeof_signed_char" = 1 ; then
+ NCURSES_SBOOL="signed char"
+else
+ NCURSES_SBOOL="char"
+fi
+AC_MSG_CHECKING(if you want to use signed Boolean array in term.h)
+AC_ARG_ENABLE(signed-char,
+ [ --enable-signed-char compile using signed Boolean's in term.h],
+ [with_signed_char=$enableval],
+ [with_signed_char=no])
+AC_MSG_RESULT($with_signed_char)
+test "x$with_signed_char" != xyes && NCURSES_SBOOL="char"
+AC_SUBST(NCURSES_SBOOL)
+