nRF52 target doesn't compile with blinky-baremetal

[MarceloSalazar]

Description of defect

nrf52_dk target fails to compile/link blinky-baremetal in Mbed OS 6

Arm error (GCC works ok)

Link: mbed-os-example-blinky-baremetal
[Warning] @0,0: L3912W: Option 'legacyalign' is deprecated.
[Error] @0,0: L6218E: Undefined symbol Image$$ARM_LIB_HEAP$$ZI$$Base (referred from BUILD/NRF52_DK/ARM/mbed-os/platform/source/mbed_sdk_boot.o).
[Error] @0,0: L6218E: Undefined symbol Image$$ARM_LIB_HEAP$$ZI$$Length (referred from BUILD/NRF52_DK/ARM/mbed-os/platform/source/mbed_sdk_boot.o).
Warning: L3912W: Option 'legacyalign' is deprecated.
Error: L6218E: Undefined symbol Image$$ARM_LIB_HEAP$$ZI$$Base (referred from BUILD/NRF52_DK/ARM/mbed-os/platform/source/mbed_sdk_boot.o).
Error: L6218E: Undefined symbol Image$$ARM_LIB_HEAP$$ZI$$Length (referred from BUILD/NRF52_DK/ARM/mbed-os/platform/source/mbed_sdk_boot.o).
Finished: 0 information, 1 warning and 2 error messages.
[ERROR] Warning: L3912W: Option 'legacyalign' is deprecated.
Error: L6218E: Undefined symbol Image$$ARM_LIB_HEAP$$ZI$$Base (referred from BUILD/NRF52_DK/ARM/mbed-os/platform/source/mbed_sdk_boot.o).
Error: L6218E: Undefined symbol Image$$ARM_LIB_HEAP$$ZI$$Length (referred from BUILD/NRF52_DK/ARM/mbed-os/platform/source/mbed_sdk_boot.o).
Finished: 0 information, 1 warning and 2 error messages.

Target(s) affected by this defect ?

nrf52_dk

Toolchain(s) (name and version) displaying this defect ?

Arm Compiler 6

What version of Mbed-os are you using (tag or sha) ?

cdc2d45

What version(s) of tools are you using. List all that apply (E.g. mbed-cli)

Mbed CLI 1.10.4

How is this defect reproduced ?

mbed import https://github.com/ARMmbed/mbed-os-example-blinky-baremetal
cd mbed-os-example-blinky
mbed compile -t <toolchain> -m <target>

@ARMmbed/mbed-os-maintainers

[ciarmcom]

Thank you for raising this detailed GitHub issue. I am now notifying our internal issue triagers.
Internal Jira reference: https://jira.arm.com/browse/IOTOSM-2620

[LDong-Arm]

PR created to add a heap region and support bare metal: #13951
Edit: To be precise, it's the two-memory memory model (separate stack and heap regions) and required by MicroLib, not bare metal.

[yogeshk19]

This doesn't compile for NRF52840 for GCC as well. Is this going to be fixed all NRF52 BLE modules?

Thanks,
Yogesh

[LDong-Arm]

@yogeshk19 As far as I tested, the blinky-baremetal example compiles for NRF52840_DK for all versions from mbed-os-6.0.0 onwards. It doesn't compile (some cryptocell dependency issue) for 5.15 at which point the bare metal support was still under development.