Duplicate optimization settings on IAR EWARM export

[ASealion]

tested on 7.7 and 8.11

Steps to reproduce
After exporting a project from the online compiler is is not possible to compile the project.
Since the project options on the "Optimizer" are set to "High" and there is a extra Option "-Oh".

This leads to the compiler message:
[Su004]: Option -O can only occur once

[0xc0170]

cc @theotherjimmy

[theotherjimmy]

Whoops. Thanks for finding this. The python that is run when you export is here: https://github.com/ARMmbed/mbed-os/tree/master/tools/export/iar This may not be the only duplicate option. You are welcome to submit a PR to mbed-os @ASealion. I can help out, or make the PR.

[theotherjimmy]

Good call on the labels @screamerbg.

I'm going to take a look today, @ASealion. I'll mention the PR I create here.

[theotherjimmy]

Looks like this line needs to check for -Oh

[theotherjimmy]

See ARMmbed/mbed-os#4293 for the fix

[Val-Apana]

In IAR: Project -> Options-> C/C++ Compiler: “Extra Options” tab, scroll down and delete the “-Oh” line.

[theotherjimmy]

Yup. That's what the PR I mentioned prevents you from having to do.