1# Building Source Code 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 6 7## Prerequisites 8 9- The [required libraries and tools](quickstart-pkg-install-package.md) have been installed. 10 11- The [compilation tools](quickstart-pkg-install-tool.md) have been installed. 12 13- The [tools specially required by Hi3861](quickstart-pkg-3861-tool.md) have been installed. 14 15- The Hello World program is ready for use. 16 17- The access to the Ubuntu environment is normal. 18 19 20## Procedure 21 22Method 1: using hb for compilation (install [compilation tools](quickstart-pkg-install-tool.md) first) 23 24Go to the root directory of the source code in the Ubuntu environment and perform the following steps: 25 261. Set the build path. 27 28 ``` 29 hb set 30 ``` 31 322. Select the current path. 33 34 ``` 35 . 36 ``` 37 383. Select **wifiiot_hispark_pegasus** under **hisilicon** and press **Enter**. 39 >  **NOTE** 40 > 41 > When adapting the development board to a specific use case, select an appropriate build form factor, that is, **product** settings. For details, see [Build Form Factors](quickstart-appendix-compiledform.md). 42 43 **Figure 1** Hi3861 build settings 44 45  46 474. Start building. 48 >  **NOTE** 49 > - To build a component (for example, **hello**), run the **hb build -T *targetName*** command. 50 > 51 > - To build a product incrementally, run the **hb build** command. 52 > 53 > - To build a product from the scratch, run the **hb build -f** command. 54 > 55 > This example builds a product from the scratch. 56 57 58 ``` 59 hb build -f 60 ``` 61 625. Check the build result. If "build success" is displayed, the building is successful. 63 >  **NOTICE** 64 > 65 > The build result and log files are stored in **out/hispark_pegasus/wifiiot_hispark_pegasus**. 66 67Method 2: using the **build.sh** script for compilation 68 69For details, see [Building Source Code Using the build.sh Script](quickstart-pkg-common-build.md).
