使用conda版yaml-cpp编译链接程序失败问题求助

环境配置步骤 #

• 激活devtoolset-10环境：

  scl enable devtoolset-10 bash
  

• 创建并激活包含yaml-cpp的conda环境：

  conda create -n test-yaml-cpp python=3.10 yaml-cpp=0.7.0
  conda activate test-yaml-cpp
  

测试代码（test.cpp） #

#include <yaml-cpp/yaml.h>
#include <iostream>
int main (void){
    YAML::Emitter out;
    out << "Hello, World!";
    std::cout << "Here's the output YAML:\n" << out.c_str();
    return 0;
}

编译尝试与报错 #

执行编译命令：

g++ -o test -I/local/home/dagnic/anaconda3/envs/test-yaml-cpp/include -L/local/home/dagnic/anaconda3/envs/test-yaml-cpp/lib test.cpp -lyaml-cpp

出现链接错误：

/opt/rh/devtoolset-10/root/usr/libexec/gcc/x86_64-redhat-linux/10/ld: /tmp/cc9sE2ck.o: in function `YAML::operator<<(YAML::Emitter&, char const*)':
test.cpp:(.text._ZN4YAMLlsERNS_7EmitterEPKc[_ZN4YAMLlsERNS_7EmitterEPKc]+0x43): undefined reference to `YAML::Emitter::Write(std::string const&)'
collect2: error: ld returned 1 exit status

补充说明 #

• 未额外设置环境变量；使用自行编译安装的yaml-cpp 0.7.0可正常编译：

  g++ -o test -I/opt/3rd-party/yaml-cpp/include -L/opt/3rd-party/yaml-cpp/lib64 test.cpp -lyaml-cpp
  

• 编辑1：调整g++参数顺序后问题仍未解决。
• 编辑2：通过conda的CentOS7镜像复现问题，步骤如下：

  docker run -i -t conda/miniconda3-centos7 /bin/bash
  
  conda install -c conda-forge yaml-cpp
  yum update -y
  yum install -y centos-release-scl-rh
  yum install -y devtoolset-10
  export PATH=/opt/rh/devtoolset-10/root/bin:$PATH
  # or scl enable devtoolset-10 bash
  g++ -o test -I/usr/local/include -L/usr/local/lib test.cpp -lyaml-cpp
  

  报错信息与之前一致：

  /opt/rh/devtoolset-10/root/usr/libexec/gcc/x86_64-redhat-linux/10/ld: /tmp/cc22r2Wj.o: in function `YAML::operator<<(YAML::Emitter&, char const*)':
  test.cpp:(.text._ZN4YAMLlsERNS_7EmitterEPKc[_ZN4YAMLlsERNS_7EmitterEPKc]+0x43):undefined reference to `YAML::Emitter::Write(std::string const&)'
  collect2: error: ld returned 1 exit status
  

内容的提问来源于stack exchange，提问作者dagnic