If you are an active Arm Development Studio user (version 2020.1 or older), the AC5.06 update 7 toolchain is bundled inside the DS installation. This is often the safest method because the package is already validated by Arm’s installer.
Deprecated / Legacy Current Version: ARM Compiler 6 (AC6) License Required: Yes (Requires a valid Keil MDK or ARM Professional license) arm compiler 506 update 7 verified download
Run the compiler with the --vsn flag. A verified Arm Compiler 506 update 7 will output: If you are an active Arm Development Studio