[TF-M] IAR libc behavior?

Hi Thomas,

I have a question about IAR compiler since we verify default GNUARM and ARMCLANG in the existing sources. If we are trying to implementing some internal version of libc APIs like 'memcmp', would IAR link with this implemented version first, or it just report a link error of duplicated symbol? Any switches do we need to assign to support this?

Thanks.

/Ken