-Wextra is not enough. Should also have: -Wconversion and -Wstrict-overflow=4 In some ways -Wextra is too much: it's annoying that -Wall with -Wextra complain

-Wextra is not enough. Should also have: -Wconversion and -Wstrict-overflow=4 In some ways -Wextra is too much: it's annoying that -Wall with -Wextra complain about unused parameters.