34/64/x86_64/source-based/config.json

{
  "libz": [
    {
      "target_version": "current",
      "ignore_linker_set_keys": [
        "_ZTI14internal_state"
      ]
    },
    {
      "target_version": "35",
      "ignore_linker_set_keys": [
        "_ZTI14internal_state"
      ]
    }
  ]
}