--- ceph-15.1.0/src/common/bit_str.h.orig 2020-02-03 09:47:20.047149798 -0500
+++ ceph-15.1.0/src/common/bit_str.h 2020-02-03 09:47:50.213149798 -0500
@@ -17,6 +17,7 @@
#include <cstdint>
#include <iosfwd>
#include <functional>
+#include <ostream>
namespace ceph {
class Formatter;