hl2_src-leak-2017/src/devtools/version_script.linux.txt

{
  global: *;
  local: 
    extern "C++" {
      *std::*;
      __cxxabi*;
      __gcc*;
      __gxx*;
      __gnu_cxx*;
      __cxa*;
      operator*;
      __dynamic_cast
    };
};