On Fri, Mar 25, 2005 at 10:45:36PM +1100, Greg Schafer wrote: > On Fri, Mar 25, 2005 at 12:06:33PM +0100, Eric Botcazou wrote: > > > What is wrong exactly? Why should 2 different build processes generate the > > same executable? Is there a (written) rule about this? > > No, there is no written rule. However, some folks (like me) are concerned > with matters of binary reproducibility, and this subtle change in x86 GCC's > default behaviour seemed a little suspect (to me at least). Like I said, no > big deal. If noone else thinks it's a problem, don't worry.
It does seem surprising that the flags used are different, and this kind of thing might potentially trip up a new GCC developer (who might experience a Heisenbug when he makes a change and just runs "make" for a quick test, not noticing that the flags have changed). But I don't think it raises an issue of binary reproducibility, because the three-stage bootstrap explicitly tests that the binaries come out byte for byte identical.
