std::__cxx11::basic_string编译错误解决方案

测试环境    CentOS Linux release 7.9.2009 (AltArch)   编译环境gcc version 4.8.2 (GCC)

场景

        对接大华ARM架构的SDK，编译链接libdhconfigsdk.so文件出错:

/dahua/lib/libdhconfigsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_replace_aux(unsigned long, unsigned long, unsigned long, char)'
/dahua/lib/libdhconfigsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator[](unsigned long)'
/dahua/lib/libdhconfigsdk.so: undefined reference to `__cxa_throw_bad_array_new_length'
/dahua/lib/libdhconfigsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(unsigned long, char, std::allocator<char> const&)'
/dahua/lib/libdhconfigsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string()'
/dahua/lib/libdhconfigsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator[](unsigned long) const'
/dahua/lib/libdhconfigsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::length() const'
/dahua/lib/libdhconfigsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::at(unsigned long)'
/dahua/lib/libdhnetsdk.so: undefined reference to `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::append(unsigned long, char)'

解决过程

                1）更新gcc version 4.8.2 (GCC)支持C11,提示同样错误

解决方案

            红帽提供的开发工具包来管理gcc版本，这样做的好处是随时切换版本，并且可以并存多个版本，不破坏原有gcc环境。

红帽官方Developer Toolset文档地址：https://access.redhat.com/documentation/en-us/red_hat_developer_toolset/8/

devtoolset对应gcc的版本

devtoolset-3对应gcc4.x.x版本

devtoolset-4对应gcc5.x.x版本

devtoolset-6对应gcc6.x.x版本

devtoolset-7对应gcc7.x.x版本

安装devtoolset包

yum install centos-release-scl yum install devtoolset-4

yum install centos-release-scl

yum install devtoolset-7

激活gcc版本，使其生效

scl enable devtoolset-7 bash

或

source /opt/rh/devtoolset-7/enable

此时通过gcc --version命令可以看到，gcc版本已经变成5.3.1，值得注意的是这仅仅在当前bash生效，如果需要永久生效，可以请自行添加环境变量。