Originally Posted by jj0

What are the best CFLAGS for the N900, to compile code best optimized for the N900's architecture, running the fastest?

I've seen some presentation of Nokia, which said: "... and don't forget to set CFLAGS XXXXXXXX to take care of XXXXXX" but can't find it...

From what I've searched for and found, I've got:

Code:

-O6 -mcpu=cortex-a8 -mtune=cortex-a8 -fomit-frame-pointer -fsigned-char -mfpu=neon -mfloat-abi=softfp

The -O6 is from some stuff that I read way back, where they were disscussing, -O3 and some guy said why not -O4, to which there were replies like -O4 doesn't even exist in GCC and somebody got to the resolution of -O6 being the best for any given architecture?

I've tried to read the GCC documentation, but got no resolution of anything beyond -O3 existing...

Does it?

And then is there anything I should add to the CFLAGS above, or are these the best custom choice for the N900?