3.1 Enabling BlueZ 5.x Package using Build Root Options

Perform the following steps to enable Bluetooth-related packages and tools for SAMA5D4 and ATWILC3000.

Clone the Buildroot-at91. For more details on cloning and building the buildroot-at9, refer to https://www.at91.com/linux4sam/bin/view/Linux4SAM/BuildRootBuild#How_to_build_Buildroot_for_AT91.
Configure the SAMA5D4 Xplained defconfig.
Go to the directory of the buildroot, then enter the following command:
```
$make atmel_sama5d4_xplained_defconfig
```
Configure the menuconfig.
Go to the directory of the buildroot, then enter the following command:
```
$ make menuconfig
```
Note: The WCHAR support (Toolchain > WCHAR) must be enabled, as it has dependency on the BlueZ stack.
Figure 3-9. Enable WCHAR Support
To enable the Bluez5 stack, navigate to Target packages > Network Applications, then select the tools as shown in the following figure.
Figure 3-10. Enable Bluez

Note: Make sure that install deprecated tool is selected; the tool includes the hciattach tool. This is used to enable Bluetooth over UART.
Save the config file, then run the make command.
After successful completion, the rootfs.ubi file is generated in the /buildroot-at91/output folder.