I don't think that this is a very meaningful comparison at these sizes, because it entirely depends on your target. Just compiling a "foo.c" file with "int main() { }" for sole content through "gcc -Os" produces a 16kb executable on my linux machine, but I know very well that the exact same compiler will produce something much smaller if I compile for, say, a bare metal AVR target because the ELF file format has a lot of fluff.