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Not quite, (void *) is special in this regard IIRC, specifically for cases like this. It's a valid pointer but you're required to ensure that any platform requirements like alignment and size will match the requirements of what you're doing.
No, (void⁎) is not special in this way. It just makes things look nicer. The code also isn't undefined behavior... but you are really asking to hit compiler bugs! This is an easy way to confuse gcc into wrongly determining that the code has undefined behavior, and if gcc gets confused then it may determine that a code path can't be taken. Code paths that can't be taken may be deleted. The main rule here is that memor…
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