Increased RAM usage after upgrade to newlib 4.3.0

[Pavel Melnikov]

Hello Keith,

Thank you for your suggestion, I didn't know this library existed. .
However, I'd like to stick to vendor-supplied toolchain as much as
possible (i.e. the ones from arm.com), or deviate from it as little as
possible. And if I need to switch from it, I'd try going to an older
newlib first.
But I'd like to give picolibc a try for one of the future projects, it
seems very promising.

_______________

Best wishes,
Paul Melnikov,
R&D Engineer, IMEC NL


On Tue, Jan 20, 2026 at 7:07 PM Keith Packard <keithp@keithp.com> wrote:
>
>
> > I'm using an ARM MCU with only 4Kb of RAM and would very much like to
> > avoid spending extra 300b on things I don't use.
>
> You might try picolibc instead; that will use a lot less RAM (and ROM).
>
> --
> -keith