@marcan42 compile with -fno-whole-program ?
Example: write a function without side effects except writing to a local array whose address is returned. The entire function disappears.
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@twoscomplement I'm compiling only, not linking, and that doesn't change anything. I'm using -O2. It doesn't delete the function with <=-O1. - Show replies
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@marcan42 I'm no gcc user, but why shouldn't that be optimized away? I mean it does nothing after all. -
@SwissHttp It doesn't do nothing: if you were to use the return address it would still usually *work* if not optimized (but it's illegal C).
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@marcan42@Freerunnering Thats undefined behavior for you.Thanks. Twitter will use this to make your timeline better. UndoUndo
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