The advice to use -Weverything is very bad advice. See, e.g., https://quuxplusone.github.io/blog/2018/12/06/dont-use-weverything/ https://quuxplusone.github.io/

The advice to use -Weverything is very bad advice. See, e.g., https://quuxplusone.github.io/blog/2018/12/06/dont-use-weverything/ https://quuxplusone.github.io/blog/2018/12/06/dont-use-wever... Using -Weverything other than for a one-off, manual build, is a sure fire way to result in one or several of 1) hacky code that works around some compiler author's style preferences, 2) less safe code because of the workaround hacks, or 3) coworkers quickly learning to ignore or disable (e.g. using inline #pragma's) diagnostics. For both GCC and clang, -Wall comes close to the line of rejecting objectively correct and good code, but doesn't quite cross the line. -Wextra crosses that line (expect it to reject some correct and good code) but the pros often outweigh the cons. -Weverything blows past the line and wraps around the earth several times.