iar export: multiple -O in the project - fails to build

[0xc0170]

Description

Error from IAR exported blinky: EWC1E0.tmp(1) : [Su004]: Option -O can only occur once (see also line 1)

This is on the latest master, blinky example exported project. The same can be seen in nightlies failures.

Related issue: ARMmbed/mbed-cli#487

I see -Ol in the Extra Options, is this causing the failure? I am currently having a license issue on my computer, will test.

Issue request type

[ ] Question
[ ] Enhancement
[X] Bug

[0xc0170]

I can confirm , removing -Ol eliminates this error

We recently changed the IAR optimization and this caused this error - as the fix for the 487 above is not valid anymore.

cc @ARMmbed/mbed-os-tools

[ciarmcom]

Internal Jira reference: https://jira.arm.com/browse/MBOCUSTRIA-1769