Include features.h (without it, testing for __UCLIBC_HAS_THREADS__

makes no sense).

libc/sysdeps/linux/cris/sysdep.S

@@ -16,6 +16,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <features.h>
 #include <sysdep.h>
 
 /* Make space for the errno variable.  */