[unlinker]

That is untrue. UB exists because C is supposed to run on so many platforms there is no way to have a defined behaviour for all of them in that standard.

[scott_s]

You are confusing undefined behavior with implementation defined behavior.

[wongarsu]

More importantly, C is not only supposed to run on many platforms (many programming languages do that), but also provide very low-level control on wide variety of platforms.

[pjmlp]

Which people keep forgetting is only available as implementation defined extensions, as such it is no longer ANSI C and any language compiler is free to have extensions.

[jjnoakes]

This is why implementation defined behavior exists.

Undefined behavior though?

[pjmlp]

I was already coding before C had any meaning outside UNIX.