Update gcc.py for preprocessing in linker script

[jh228]

To fix #11214, we need this update. :-)

Description

Pull request type

[x] Fix
[ ] Refactor
[ ] Target update
[ ] Functionality change
[ ] Docs update
[ ] Test update
[ ] Breaking change

Reviewers

Release Notes

[ciarmcom]

@jh228, thank you for your changes.
@ARMmbed/mbed-os-tools @ARMmbed/mbed-os-maintainers please review.

[0xc0170]

Is it only GCC , the other toolchains do not need any fix?

I can't recall if there was a reason for not having this in. We preprocess linker script (how bootloader gets in or out via start/end address). Is this just fixing adding some symbols rather than adding preprocessing?

[andrewc-arm]

Hi, @0xc0170
Can we put enabling Arm Keil and IAR toolchain enablement as a separate Arm internal JIRA ticket? I think it would be polite to let our customer's need to be CI tested and PR approved as it is and someone else with good understanding of Keil and IAR Python scripts to follow your concern. 😃

[0xc0170]

Yes, can be treated separately just trying to understand the scope of this - if it is generic issue or toolchain specific - what we have missed. This review should help us understand if we missed one toolchain or it's generic and ask the question - was there an intention of keeping this away?

cc @ARMmbed/mbed-os-tools

[0xc0170]

I reviewed other exporters, they do not export config symbols neither. This means there was an intention perhaps. I could not locate any more information for this neither an issue besides the one mentioned above. @ARMmbed/mbed-os-tools Your review needed.

One thing that comes to my mind is extending the cmd by adding config symbols to the ld.

[andrewc-arm]

Hi, @ARMmbed/mbed-os-tools
Any update? 😁

[mark-edgeworth]

Hi, @ARMmbed/mbed-os-tools
Any update? 😁

I'm sorry but I don't know enough about this to be able to approve or otherwise.

[0xc0170]

@mark-edgeworth Can you catch up with Jimmy ? he might know a reason why was not there.

[0xc0170]

I'll run CI meanwhile

[theotherjimmy]

@0xc0170 This is not an exporter, so discussion about exporters is not relevant. The other compilers build preprocessing into their linker in some fashion, and make this change unnecessary to IAR and ARMC5/6.

[theotherjimmy]

This seems like this is fine.

[mbed-ci]

Test run: SUCCESS

Summary: 11 of 11 test jobs passed
Build number : 1
Build artifacts

[0xc0170]

Thanks @theotherjimmy

[andrewc-arm]

Awesome. Thank you for the support!