Re: [avr-gcc-list] ATMega128, fuse bits, program optimisation, several questions

[E. Weddington]

Torsten Mohr wrote:

> The last time i compiled a program for an AVR was with gcc-2.95.2.
>
> When compiling a test program for it, what optimisation level
> do i need to set?  I thought that at least -O2 is needed so that
> some asm statements won't get "optimised away".
> (I tried my test program with -Os, -O0 and -O2.)
>  
So far the best one in that set is the one for size: -Os. In the 
avr-libc user manual, FAQ, there is a discussion about what the optimal 
settings are for reducing code size.

FYI, The very latest toolset versions (that are stable) are:
binutils 2.16
gcc 3.4.4
avr-libc 1.2.3

Eric