source_subfolder/api/queryinternal.cc:193:32: warning: 'mem_fun<double, Xapian::PostingIterator::Internal>' is deprecated [-Wdeprecated-declarations]
    for_each(begin, pls.end(), mem_fun(&PostList::recalc_maxweight));
                               ^
/usr/lib/llvm-9/bin/../include/c++/v1/functional:1148:1: note: 'mem_fun<double, Xapian::PostingIterator::Internal>' has been explicitly marked deprecated here
_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY
^
/usr/lib/llvm-9/bin/../include/c++/v1/__config:944:39: note: expanded from macro '_LIBCPP_DEPRECATED_IN_CXX11'
#  define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED
                                      ^
/usr/lib/llvm-9/bin/../include/c++/v1/__config:933:48: note: expanded from macro '_LIBCPP_DEPRECATED'
#    define _LIBCPP_DEPRECATED __attribute__ ((deprecated))
                                               ^
1 warning generated.
ar: `u' modifier ignored since `D' is the default (see `U')
ar: `u' modifier ignored since `D' is the default (see `U')
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY