[Bug] failed to build master

[JackyWoo]

Search before asking

• I had searched in the issues and found no similar issues.

Version

commit 5f92656 (HEAD -> master, origin/master, origin/HEAD)
Author: wudi wudi@selectdb.com
Date: Sun Jan 4 14:08:32 2026 +0800

What's Wrong?

Description

I build the project based on the document and got the following error

===== begin build boost_1_81_0
Building B2 engine..

A C++11 capable compiler is required for building the B2 engine.
Toolset 'clang' does not appear to support C++11.

> clang++ -x c++ -std=c++11  check_cxx11.cpp
ld.lld: error: undefined symbol: pthread_sigmask
>>> referenced by posix_spawn.c
>>>               posix_spawn.c.o:(child) in archive /data1/home/wujianchao/project/jd/ldb_toolchain/bin/../usr/lib/./libglibc-compatibility.a
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

Command

BUILD_TYPE=Debug bash build.sh

Env.

Ubuntu 20.04 x86_64
LDB toolchain

export NODE_HOME=/data1/home/wujianchao/cmd/node-v12.13.0-linux-x64
export MAVEN_HOME=/data1/home/wujianchao/cmd/apache-maven-3.9.12
export LDB_TOOLCHAIN=/data1/home/wujianchao/project/jd/ldb_toolchain

export PATH=$LDB_TOOLCHAIN/bin:$MAVEN_HOME/bin:$NODE_HOME/bin:$PATH


clang --version
clang version 20.1.8
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /data1/home/wujianchao/project/jd/ldb_toolchain/tmp/gentoo/llvm/bin

What You Expected?

build successfully

How to Reproduce?

No response

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct

[ulekarsiddhant0-boop]

Hello @JackyWoo , I am interested in this issue #59537. I properly understood this issue. So, please assign this issue to me for working on it and create pr.
Thank You!

[JackyWoo]

@ulekarsiddhant0-boop thanks, maybe we need a commiter to do assignning, but please feel free to work on it and submit a PR.