1# ArkCompiler Subsystem Changelog
2
3## cl.arkcompiler.1 Change in ArkCompiler AOT Enabling Mode
4**First Applicable Version**
5
6OpenHarmony_4.1.6.2
7
8**Reason for Change**
9
10The change is made to enable the use of AOT in the user version.
11
12**Change Impact**
13
14This change is a compatible change.
15
16- Before change: AOT is only available for ROM images of the root version.
17- After change: AOT is also available for ROM images of the user version.
18
19**API Level**
20
21N/A
22
23**Change Since**
24
25OpenHarmony_4.1.6.2
26
27**Key API/Component Changes**
28
29ArkCompiler AOT enabling mode
30
31**Adaptation Guide**
32
33For details, see [AOT Guide](https://gitee.com/openharmony/arkcompiler_ets_runtime/blob/master/docs/aot-guide_zh.md).
34