What difference does -ggdb make vs -g? I see it does extra 'tuning' of the debug output for GDB [1], but it's unclear what effect that might actually have. [1]

What difference does -ggdb make vs -g? I see it does extra 'tuning' of the debug output for GDB [1], but it's unclear what effect that might actually have. [1]: https://clang.llvm.org/docs/UsersManual.html#controlling-debugger-tuning https://clang.llvm.org/docs/UsersManual.html#controlling-deb...