Re: [poky] [PATCH] poky-tiny: Enable size optimization by default

["Mikko Rapeli" <mikko.rapeli@bmw.de>]

On Thu, Oct 29, 2020 at 09:52:02PM -0700, Khem Raj wrote:
> On Thu, Oct 29, 2020 at 10:39 AM Alejandro Hernandez Samaniego
> <alejandro@enedino.org> wrote:
> >
> > Compiler size optimization reduces the size of the root
> > filesystem by 15%, since poky-tiny is meant to be used
> > on size constrained devices, enable it by default
> >
> > Signed-off-by: Alejandro Enedino Hernandez Samaniego <alhe@linux.microsoft.com>
> > ---
> >  meta-poky/conf/distro/poky-tiny.conf | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/meta-poky/conf/distro/poky-tiny.conf b/meta-poky/conf/distro/poky-tiny.conf
> > index 57826037f0..9a043b1ef5 100644
> > --- a/meta-poky/conf/distro/poky-tiny.conf
> > +++ b/meta-poky/conf/distro/poky-tiny.conf
> > @@ -32,6 +32,9 @@ require conf/distro/poky.conf
> >  DISTRO = "poky-tiny"
> >  DISTROOVERRIDES = "poky:poky-tiny"
> >  TCLIBC = "musl"
> > +
> > +FULL_OPTIMIZATION="-Os -pipe ${DEBUG_FLAGS}"
> > +
> 
> this looks good. Thanks for doing this.

Agreed! Unfortunately many, many recipes do add O2 or even O3 in
their own build scripts so the effect of this global Os setting
is not as good as it could be.

When I played with size optimization, I build the system first with
normal O2, then with Os and reviewed every single recipe where binary
package sizes did not change according to buildhistory.

Cheers,

-Mikko