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 ``` 18 pip3 install --user build/lite 19 ``` 20 212. Set an environment variable. 22 23 ``` 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 ``` 30 export PATH=~/.local/bin:$PATH 31 ``` 32 33 Update the environment variable. 34 35 ``` 36 source ~/.bashrc 37 ``` 38 393. Run the **hb -h** command in the source code directory. If the following information is displayed, the installation is successful: 40 41 ``` 42 usage: hb 43 44 OHOS build system 45 46 positional arguments: 47 {build,set,env,clean} 48 build Build source code 49 set OHOS build settings 50 env Show OHOS build env 51 clean Clean output 52 53 optional arguments: 54 -h, --help show this help message and exit 55 ``` 56 57>  **NOTICE** 58> - To uninstall hb, run the following command: 59> 60> ``` 61> pip3 uninstall ohos-build 62> ``` 63> 64> - If any issue occurs during the hb installation, see [FAQs](quickstart-pkg-common-hberr.md). 65 66 67## Installing LLVM (Only Required for OpenHarmony_v1.x) 68 69>  **NOTICE** 70> 71> When downloading source code under the OpenHarmony_v1.x branches or tags, perform the procedure described in this section to install LLVM 9.0.0. 72> 73> When downloading source code under the Master or non-OpenHarmony_v1.x branches or tags, skip this section. hb will automatically download the latest version of LLVM. 74 751. Start the Linux server. 76 772. [Download LLVM](https://repo.huaweicloud.com/harmonyos/compiler/clang/9.0.0-36191/linux/llvm-linux-9.0.0-36191.tar). 78 793. Decompress the LLVM installation package to **~/llvm**. 80 81 ``` 82 tar -zxvf llvm.tar -C ~/ 83 ``` 84 854. Set an environment variable. 86 87 ``` 88 vim ~/.bashrc 89 ``` 90 91 Copy the following command to the last line of the .bashrc file, save the file, and exit. 92 93 94 ``` 95 export PATH=~/llvm/bin:$PATH 96 ``` 97 985. Validate the environment variable. 99 100 ``` 101 source ~/.bashrc 102 ``` 103
