[TF-M] mcmse option to compile non secure image

Hello,

I have been working for a few weeks with the Trusted Firmware M software and I was wondering a question to which I cannot find an answer. This concerns CMSE, I thought the -mcmse option should only be used to compile secure images (http://www.keil.com/support/man/docs/armclang_ref/armclang_ref_pge1444647306...). However, it seems to me that the non secure image of TF-M is also compiled with the -mcmse option. Is there a reason for this?

Thank you in advance for the answer, Best regards,

Cindy Chaumont (Intern in embedded computing at Witekio)