Ceph

I think this is a problem, I build 14.2.10 is successful. But build 14.2.21 is failed and report is as follows:
```
[ 64%] Building CXX object src/test/common/CMakeFiles/unittest_bloom_filter.dir/test_bloom_filter.cc.o
make<sup>1</sup>: * [src/os/CMakeFiles/os.dir/all] Error 2
make<sup>1</sup>: Waiting for unfinished jobs....
[ 64%] Linking CXX executable ../../../bin/unittest_numa
[ 64%] Built target unittest_numa
[ 64%] Linking CXX executable ../../../bin/ceph_test_cls_journal
[ 64%] Built target ceph_test_cls_journal
[ 64%] Linking CXX executable ../../../bin/unittest_context
[ 64%] Linking CXX executable ../../../bin/unittest_lru
[ 64%] Built target unittest_context
[ 64%] Built target unittest_lru
[ 64%] Linking CXX executable ../../../bin/ceph_test_cls_lua
[ 64%] Built target ceph_test_cls_lua
[ 64%] Linking CXX executable ../../../bin/unittest_sharedptr_registry
[ 64%] Linking CXX executable ../../../bin/unittest_json_formattable
[ 64%] Linking CXX executable ../../../bin/unittest_lockdep
[ 64%] Built target unittest_sharedptr_registry
[ 64%] Built target unittest_json_formattable
[ 64%] Built target unittest_lockdep
[ 64%] Linking CXX executable ../../../bin/ceph_test_cls_rgw
[ 64%] Linking CXX executable ../../../bin/unittest_async_shared_mutex
[ 64%] Built target unittest_async_shared_mutex
[ 64%] Built target ceph_test_cls_rgw
[ 64%] Built target rgw_admin_user
[ 64%] Linking CXX executable ../../../bin/unittest_shared_cache
[ 64%] Linking CXX executable ../../../bin/unittest_bloom_filter
[ 64%] Built target unittest_shared_cache
[ 64%] Built target unittest_bloom_filter
[ 64%] Linking CXX executable ../../../bin/ceph_test_cls_rbd
[ 64%] Built target ceph_test_cls_rbd
[ 64%] Linking CXX executable ../../bin/unittest_log
[ 64%] Built target unittest_log
make: ** [all] Error 2
error：/var/tmp/rpm-tmp.a24fI7 (%build) The exit status is not good

RPM build error：
/var/tmp/rpm-tmp.a24fI7 (%build) The exit status is not good
```
I don't know how to find the cause of this problem.