Peter Mueller wrote:
Hi,
I want to use gcc instead of IAR. My application is around 3k with
IAR but about 4k with gcc. I tried -Os and -O2 with gcc. Any other
compiler switches that further reduce code size?
Thanks,
Peter
If you use floating point (even one single definition of a floating
point value) a binary produced by IAR is considerably smaller than one
produced by GCC. It is also faster. This is because we have never done
any significant work to optimise the floating point library. However,
with -O2 most integer only programs compile to a smaller binary using
GCC. Not every program is the same, though. I have found examples which
are a few percent bigger using GCC. A integer only binary which is 1/3rd
bigger using GCC would be strange.
Regards,
Steve
