測試環境 CentOS Linux release 7.9.2009 (AltArch) 編譯環境gcc version 4.8.2 (GCC)
場景
對接大華ARM架構的SDK，編譯鏈接libdhconfigsdk.so文件出錯:
/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)'
解決過程
1）更新gcc version 4.8.2 (GCC)支持C11,提示同樣錯誤
解決方案
紅帽提供的開發工具包來管理gcc版本，這樣做的好處是隨時切換版本，並且可以並存多個版本，不破壞原有gcc環境。
紅帽官方Developer Toolset文檔地址：https://access.redhat.com/documentation/en-us/red_hat_developer_toolset/8/
devtoolset對應gcc的版本
devtoolset-3對應gcc4.x.x版本
devtoolset-4對應gcc5.x.x版本
devtoolset-6對應gcc6.x.x版本
devtoolset-7對應gcc7.x.x版本
安裝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
此時通過gcc --version命令可以看到，gcc版本已經變成5.3.1，值得注意的是這僅僅在當前bash生效，如果需要永久生效，可以請自行添加環境變量。