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1# Building Source Code
2
3
4You can build source code with hb or the **build.sh** script. This topic describes how to build source code with hb. For details about how to use the **build.sh** script, see [Building Source Code Using the build.sh Script](quickstart-pkg-common-build.md).
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6
7For details about the functions of the OpenHarmony compilation and building module, see [Compilation and Building Guide](../subsystems/subsys-build-all.md).
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9
10## Prerequisites
11
12- The [required libraries and tools](quickstart-pkg-install-package.md) have been installed.
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14- The [compilation tools](quickstart-pkg-install-tool.md) have been installed.
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16- The [tools specially required by Hi3861](quickstart-pkg-3861-tool.md) have been installed.
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18- The Hello World program is ready for use.
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20- The access to the Ubuntu environment is normal.
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22
23## Procedure
24
25Go to the root directory of the source code in the Ubuntu environment and perform the following steps:
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271. Set the build path.
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29   ```
30   hb set
31   ```
32
332. Select the current path.
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35   ```
36   .
37   ```
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393. Select **wifiiot_hispark_pegasus** under **hisilicon** and press **Enter**.
40   > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
41   >
42   > 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).
43
44   **Figure 1** Hi3861 build settings
45
46   ![quickstart-lite-3861-build](figures/quickstart-lite-3861-build.png)
47
484. Start building.
49   > ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
50   > - To build a component (for example, **hello**), run the **hb build -T *targetName*** command.
51   >
52   > - To build a product incrementally, run the **hb build** command.
53   >
54   > - To build a product from the scratch, run the **hb build -f** command.
55   >
56   > This example builds a product from the scratch.
57
58
59   ```
60   hb build -f
61   ```
62
635. Check the build result. If "build success" is displayed, the building is successful.
64   > ![icon-notice.gif](public_sys-resources/icon-notice.gif) **NOTICE**
65   >
66   > The build result and log files are stored in **out/hispark_pegasus/wifiiot_hispark_pegasus**.
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