Comment # 16 on bug 1194875 from Martin Li������ka

So apparently it's not resolved yet:

[  419s]
/home/abuild/rpmbuild/BUILD/ceph-16.2.7-640-gceb23c7491b/src/include/rados/buffer.h:98:52:
error: expected '{' before '<' token
[  419s]
/home/abuild/rpmbuild/BUILD/ceph-16.2.7-640-gceb23c7491b/src/include/rados/buffer.h:374:17:
error: 'unique_ptr' in namespace 'std' does not name a template type
[  419s]   374 |     static std::unique_ptr<ptr_node, disposer>
[  419s]       |                 ^~~~~~~~~~
[  419s]
/home/abuild/rpmbuild/BUILD/ceph-16.2.7-640-gceb23c7491b/src/include/rados/buffer.h:65:1:
note: 'std::unique_ptr' is defined in header '<memory>'; did you forget to
'#include <memory>'?
[  419s]    64 | #include "inline_memory.h"
[  419s]   +++ |+#include <memory>
[  419s]    65 | 


https://build.opensuse.org/build/openSUSE:Factory:Staging:Gcc7/standard/x86_64/ceph/_log

which is something mentioned by Nathan here:
https://tracker.ceph.com/issues/53896#note-5