Fail only ARMCC of Cortex-A on Mbed OS that incorporated RTX5.3

[TomoYamanaka]

Description

When using the latest Mbed OS on GR-PEACH or GR-LYCHEE, I faced the following behavior.
This issue seems that it occurs on Cortex-A and toolchain is ARMCC only.

• SYNC_FAILED is shown by mbed test for ARMCC
  Although I run the mbed test command of below, SYNC_FAILED will be shown from the first test.
  $ mbed test -t ARM -m RZ_A1H
  Log is here:
  SYNC_FAILED_mbed_test_armcc.txt

AS a result of investigation, I found out the below.

• Mbed OS 5.8.5 is no problem.
• 863259e is no problem.
• d8cb72a occurs the above.

In addition,
mbed-os-exaple-blinky sample that incorporated the above commit does not work also (ARMCC only).

Thus, I think that the cahnge of #6273 (RTX 5.3 update) has influence in some way.
Could you please confirm the above at soon?

Issue request type

[ ] Question
[ ] Enhancement 
[X] Bug

[ciarmcom]

ARM Internal Ref: MBOTRIAGE-5