该问题是怎么引起的？

compile the source code

重现步骤

python build.py ipcamera_hi3516dv300

报错信息

python build.py ipcamera_hi3516dv300
Error: /usr/bin/clang is not OHOS compiler, please install compiler.
usage:
python build.py ipcamera_hi3516dv300
python build.py ipcamera_hi3518ev300
python build.py wifiiot

positional arguments:
product Name of the product

optional arguments:
-h, --help show this help message and exit
-b BUILD_TYPE, --build_type BUILD_TYPE
release or debug version.
-t [TEST [TEST ...]], --test [TEST [TEST ...]]
Compile test suit
-n, --ndk Compile ndk