pierre wrote: > Why is there a difference between 3.4.6 and 4.1.2 gcc version ? > Despite my efforts understanding this, i would appreciate any links > regarding any document related to this. The later version seems to be keeping the stack aligned to a larger alignment. Some instructions require this (e.g. SSE) and keeping the stack always aligned to 16 makes supporting these instructions a lot easier. But you should treat the size of the frame that the compiler chooses as an implementation detail; it will vary with a number of factors. But the size of the frame usually doesn't affect pointer calculations, i.e. the first local variable is %ebp-4 regardless of whether the allocated frame is 16 or 1600 bytes. Brian
