1# Installing the Compilation Tools 2 3 4For details about the functions of the OpenHarmony compilation and building module, see [Compilation and Building Guide](../subsystems/subsys-build-all.md). 5 6Perform the following steps on Ubuntu. 7 8 9## hb Installation 10 11>  **NOTE** 12> 13> For details about how to install the proxy, see [Configuring the Proxy](quickstart-pkg-common-proxy.md). 14 151. Run the following command to install hb and update it to the latest version: 16 17 ```shell 18 python3 -m pip install --user build/hb 19 ``` 20 212. Set an environment variable. 22 23 ```shell 24 vim ~/.bashrc 25 ``` 26 27 Copy the following command to the last line of the .bashrc file, save the file, and exit. 28 29 ```shell 30 export PATH=~/.local/bin:$PATH 31 ``` 32 33 Update the environment variable. 34 35 ```shell 36 source ~/.bashrc 37 ``` 38 393. Run the **hb help** command in the source code directory. If the following information is displayed, the installation is successful: 40 41  42 43>  **NOTICE** 44> - To uninstall hb, run the following command: 45> 46> ```shell 47> python3 -m pip uninstall ohos-build 48> ``` 49> 50> - If any issue occurs during the hb installation, see [FAQs](quickstart-pkg-common-hberr.md). 51 52 53## Installing LLVM (Only Required for OpenHarmony_v1.x) 54 55>  **NOTICE** 56> 57> When downloading source code under the OpenHarmony_v1.x branches or tags, perform the procedure described in this section to install LLVM 9.0.0. 58> 59> When downloading source code under the Master or non-OpenHarmony_v1.x branches or tags, skip this section. hb will automatically download the latest version of LLVM. 60 611. Start the Linux server. 62 632. [Download LLVM](https://repo.huaweicloud.com/harmonyos/compiler/clang/9.0.0-36191/linux/llvm-linux-9.0.0-36191.tar). 64 653. Decompress the LLVM installation package to **~/llvm**. 66 67 ```shell 68 tar -zxvf llvm.tar -C ~/ 69 ``` 70 714. Set an environment variable. 72 73 ```shell 74 vim ~/.bashrc 75 ``` 76 77 Copy the following command to the last line of the .bashrc file, save the file, and exit. 78 79 80 ```shell 81 export PATH=~/llvm/bin:$PATH 82 ``` 83 845. Validate the environment variable. 85 86 ```shell 87 source ~/.bashrc 88 ``` 89
