g++ 15.1.1 compile warning "<ciso646> is deprecated in C++17

[ZCKevin-TW]

Hi, I just updated my compiler to gcc version 15.1.1 20250425 (GCC).
When I compiled my project, I encountered

[build] FAILED: external/clickhouse-cpp/contrib/absl/absl/CMakeFiles/absl_int128.dir/numeric/int128.cc.o 
[build] /usr/bin/g++  -Ixxx/external/clickhouse-cpp/contrib/absl -pthread -Wall -Wextra -Werror -Wno-deprecated-declarations -g -std=gnu++17 -MD -MT external/clickhouse-cpp/contrib/absl/absl/CMakeFiles/absl_int128.dir/numeric/int128.cc.o -MF external/clickhouse-cpp/contrib/absl/absl/CMakeFiles/absl_int128.dir/numeric/int128.cc.o.d -o external/clickhouse-cpp/contrib/absl/absl/CMakeFiles/absl_int128.dir/numeric/int128.cc.o -c /xxx/external/clickhouse-cpp/contrib/absl/absl/numeric/int128.cc
[build] In file included from /xxx/external/clickhouse-cpp/contrib/absl/absl/base/options.h:73,
[build]                  from /xxx/external/clickhouse-cpp/contrib/absl/absl/base/config.h:66,
[build]                  from /xxx/external/clickhouse-cpp/contrib/absl/absl/numeric/int128.h:33,
[build]                  from /xxx/external/clickhouse-cpp/contrib/absl/absl/numeric/int128.cc:15:
[build] /usr/include/c++/15.1.1/ciso646:46:4: error: #warning "<ciso646> is deprecated in C++17, use <version> to detect implementation-specific macros" [-Werror=cpp]
[build]    46 | #  warning "<ciso646> is deprecated in C++17, use <version> to detect implementation-specific macros"
[build]       |
...

Is it safe to ignore this warning?

[RoyBellingan]

Yes is just a minor nitpick, and I tough was from c++20! (#561)