WL SOC GNU ARM compiler support

[elsalahy]

Summary:

We need an ARM GCC WL SOC startup file and linker script to avoid using IAR toolchain.

Why do we need this?

To avoid using IAR or MDK licensed toolchains.

What is already there? What do you see now?

IAR startup assembly files.

What is missing? What do you want to see?

GNU ARM startup file support for the ST WL SOC.

How do you propose to implement this?

Use reference STM32L4 GCC start-up files.

Environment:

Baremetal.

Acceptance Criteria:

• Can compile an application for the WL SOC using GNU ARM
• Application behaviour is similar to IAR counterpart.

What can you do yourself and what do you need help with?

ALL.

[elsalahy]

Finished on May 5th, see GCC startup file and Linker script

[elsalahy]

Will open a relevant PR when we start developing FW for the node HW prototypes.