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Minimum compiler version for M23/33 support?

Michael Engel

Hi,

I'm trying to compile the Cortex-M23 example for the MPS2+ board according to AN301 (http://www.keil.com/appnotes/files/apnt_301.pdf).

The installed version of MDK is "MDK-ARM Standard Cortex-M only Version 5.23" (µVision V5.23.0.0), the C compiler is Armcc.exe V5.06 update 4 (build 422) as well as the clang-based compiler V6.6. The required packs seem to be installed correctly.

Regardless of the compiler version I select, the build throws an error, since the compiler does not support the "-mcpu=cortex-m23" flag:

ArmClang.exe: error: ARM Compiler does not support '-mcpu=cortex-m23'

Quoting AN301, "All the ARMv8-M support is now in our standard MDK product as of version
5.23 and later. Just perform the normal MDK installation."

I haven't tried upgrading to V5.24 (or switching to gcc...) so far, but from AN301 I would assume that compiling should already work with the version I have installed. Any ideas what I'm missing here?

Best, Michael

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