INTERFACE_COMPILE_DEFINITIONS does not work IMPORTED targets:

From 3.6:

    Specify compile definitions to use when compiling a given <target>.
    The named <target> must have been created by a command such as
    add_executable() or add_library() and must not be an Imported Target.

Since 3.11:

    Specify compile definitions to use when compiling a given <target>.
    The named <target> must have been created by a command such as
    add_executable() or add_library() and must not be an ALIAS target.

And this causes the -Wundef warning:
    src/Functions/FunctionsHashing.h:1326:5: warning: 'USE_XXHASH' is not defined, evaluates to 0 [-Wundef]

unbundled jemalloc cannot be used, since it includes jemalloc_cpp.o that
contains new/delete overrides, so as clickhouse [1]:

    ld.lld: error: duplicate symbol: operator delete(void*, unsigned long)
    >>> defined at new_delete.cpp:147 (../src/Common/new_delete.cpp:147)
    >>>            new_delete.cpp.o:(operator delete(void*, unsigned long)) in archive src/libclickhouse_new_delete.a
    >>> defined at jemalloc_cpp.o:(.text+0x160) in archive /usr/lib/x86_64-linux-gnu/libjemalloc.a

  [1]: https://clickhouse-builds.s3.yandex.net/15828/35335f07dbf8cab89b4188a674b033c28409dc7b/clickhouse_build_check/build_log_793952627_1602401325.txt