botan_all.cpp:61113:79: warning: lambda capture 'powm_window' is not required to be captured for this use [-Wunused-lambda-capture]
         auto future_j1 = std::async(std::launch::async, [this, &m, &d1_mask, powm_window]() {
                                                                            ~~^~~~~~~~~~~
1 warning generated.
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY