Skip to content

g++ 15.1.1 compile warning "<ciso646> is deprecated in C++17 #421

@ZCKevin-TW

Description

@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?

Metadata

Metadata

Assignees

No one assigned

    Labels

    questionFurther information is requested

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions