Hi all,

Currently build of psa arch tests fail for CM55 core of our PSE84 platform

File: api-tests/tools/cmake/compiler/{ARMCLANG,GNUARM}.cmake (same in secure-debug/).

Problem: The toolchain file unconditionally adds -march=... derived from CPU_ARCH. When built inside TF-M, mcpu_features.cmake already sets -mcpu=... with extension toggles. The compiler then sees two CPU specs that disagree on extensions.

Why CM33 works, CM55 doesn't:

CM33: -mcpu=cortex-m33 and -march=armv8-m.main describe the same extension set → accepted.

CM55: -mcpu=cortex-m55+nomve+... and -march=armv8.1-m.main disagree on MVE/FP → rejected.

Fix (generic): Skip the -march block when an outer build already selects the CPU (e.g. TFM_SYSTEM_PROCESSOR defined, or CMAKE_C_FLAGS contains -mcpu=/--target=). Long-term: switch psa-arch-tests to -mcpu-based selection.

We have not yet pushed PSE84 psa arch tests target, but maybe this can be check by ARM team using one of ARM CM55 based platforms (e.g. Corstone-300 (MPS3))?

Best regards,

Bohdan Hunko

Cypress Semiconductor Ukraine LLC

Senior Engineer

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Mobile: +380995019714
Bohdan.Hunko@infineon.com