# ArkCompiler Subsystem Changelog

## cl.arkcompiler.1 Change in ArkCompiler AOT Enabling Mode
**First Applicable Version**

OpenHarmony_4.1.6.2

**Reason for Change**

The change is made to enable the use of AOT in the user version.

**Change Impact**

This change is a compatible change.

- Before change: AOT is only available for ROM images of the root version.
- After change: AOT is also available for ROM images of the user version.

**API Level**

N/A

**Change Since**

OpenHarmony_4.1.6.2

**Key API/Component Changes**

ArkCompiler AOT enabling mode

**Adaptation Guide**

For details, see [AOT Guide](https://gitee.com/openharmony/arkcompiler_ets_runtime/blob/master/docs/aot-guide_zh.md).