Hi! I agree with all this, just two more comments: On Sun, Apr 18, 2021 at 04:10:48PM +0200, David Brown wrote: > On 18/04/2021 00:47, Alexander Shpilkin via Gcc-help wrote: > There is little difference (IME) about what is dropped or not between > different variations on optimisation levels (-Os, -O2, -Og). But there > is a huge difference between -O0 (no optimisation) and -O1. -O2 enables inlining, which can be hugely important for code size. It depends on the style of code. > And of course make everything static where possible. You can use -Wmissing-declarations to find the functions you forgot to make static. Segher
