Pro tip: `#pragma GCC poison` is very good for (incrementally) getting rid of specific C-isms (both individual macros and individual functions) and keeping them

Pro tip: `#pragma GCC poison` is very good for (incrementally) getting rid of specific C-isms (both individual macros and individual functions) and keeping them out. It looks like `#pragma deprecated` is similar for MSVC, but it has the major downside of only being a warning. That said, I am not at all afraid of using macros when appropriate. Just give them names that scream "I_AM_A_MACRO" unless you take care to make them sufficiently function-like, and if public give them a "namespace" prefix either way.