Hi, Do you have any idea on this scenario: When gcc(3.3.3) allocating space for local varibles, e.g. a statement like 'char buf[256];', the allocated buffers in stack always come with some space filled in at the end. If choose higher optimization level, let's say gcc -O6, the spaced filled at the end are smaller. I searched quite a lot documents, cannot find the official reason. Yang Ye
