Same source generates different object code for gcc 4.1.2

[sudhakar govindavajhala]

Hi all,

I am wondering why code generated by the same gcc 4.1.2 compiler on
the same source and the same machine generates different codes at
different times.  I find this behavior very odd.  Could someone please
add me some perspective on this?

The source code just includes <iostream>

Thanks,
Sudhakar


gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-51)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.




whychange.cc:
#include <iostream>

check.sh:
#!/usr/bin/bash
g++   -c -o whychange1.o whychange.cc
md5sum whychange1.o
objdump -D -S whychange1.o  > 1.d
g++   -c -o whychange2.o whychange.cc
md5sum whychange2.o
objdump -D -S whychange2.o  > 2.d
diff 1.d 2.d