In an early version of the C compiler gcc, when the pragma directive was introduced, it took the "implementation-defined" effect literally and tried to launch computer games.
@RadicalEdward The problem of "implementation-defined" and "undefined" behaviours that are too numerous in C and C++: the compiler can do anything (ignoring the lines, launching a game, removing the files, formating the disks, etc.). Those should not exist in a programming language.
@Feufochmar @RadicalEdward I'm inclined to agree with you.
I'm not.
As long as the implemented behaviors are properly documented, undefined behaviours can be useful hooks: don't forget that C is a language designed to be used in a wide variety of use cases: portability is valuable in many of them, but sometimes is not relevant at all.
