Either declare variable ldOn as volatile or Remove optimizations from compilation and check

It should work. Even after using volatile keyword/removing optimization from compilation if code is not working then you have triple review your code and check whether somewhere else variable is being modified.

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Either declare variable ldOn as volatile or Remove optimizations from compilation and check

It should work. Even after using volatile keyword/removing optimization from compilation if code is not working then you have to triple review your code and check whether somewhere else variable is being modified.

Check this link