tree 0520bdabbd4a30f8018a39b8eb0182c70ad0543b
parent 023d4591630964633a5547c0f086109948e36927
author Marc Kupietz <kupietz@ids-mannheim.de> 1785458794 +0900
committer Marc Kupietz <kupietz@ids-mannheim.de> 1785458794 +0900

Support rocksdb 11

rocksdb 11 needs C++20 for its headers and hands the database back from
DB::Open() and DB::OpenForReadOnly() as a unique_ptr instead of a raw pointer.
The newest standard the compiler knows is used now, and the two open calls go
through a macro that adapts to the rocksdb version, so 7, 10 and 11 all build.

Verified with rocksdb 7.8.3 (debian), 10.2.1 (fedora) and 11.0.4 (alpine,
musl): no warnings, ctest passes, and reading a database written by rocksdb
5.11 still gives identical results for 251 word ids.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Change-Id: If16e6aa2fbe8478f3260e358dce53b2dc5144d9d