| ## `ndebug` setting now controls C++ stdlib assertions | |
| The `ndebug` setting, if disabled, now passes preprocessor defines to enable | |
| debugging assertions within the C++ standard library. | |
| For GCC, `-D_GLIBCXX_ASSERTIONS=1` is set. | |
| For Clang, `-D_GLIBCXX_ASSERTIONS=1` is set to cover libstdc++ usage, | |
| and `-D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_EXTENSIVE` or | |
| `-D_LIBCPP_ENABLE_ASSERTIONS=1` is used depending on the Clang version. |