Hi Øyvind

Yes, you are right, we don’t use wchar_t within TF-M and it does seem a trivial optimization without much benefit for TF-M other than introducing incompatibilities. Could you submit a patch to remove the same from GCC and ARMCLANG ?

Best Regards
Soby Mathew

From: TF-M <tf-m-bounces@lists.trustedfirmware.org> On Behalf Of Rønningstad, Øyvind via TF-M
Sent: 05 October 2020 09:12
To: tf-m@lists.trustedfirmware.org
Subject: [TF-M] -fshort-wchar

Hi guys. I’m curious why -fshort-wchar is enabled for ARMCLANG and GNUARM (not IAR, interestingly). This should have little or no impact since wchar_t is so rarely used, and causes incompatibility when I try to link my Zephyr app with TF-M libs.

Øyvind