Building an application

Note

To build an application it is recommended to use a host device as described here. This guide assumes you set-up your Astra Machina board with a working image as explained in Installing a pre-built system image and you connected the host and the board to the same network.

To build an application follows these steps:

Download a pre-built toolchain package from the release page.

Unpack the toolchain package, the CPUTYPE for sl1680 is cortexa73, for sl1620 and sl1640 is cortexa55:

$ ./poky-glibc-x86_64-astra-media-${CPUTYPE}-${MACHINE}-toolchain-4.0.9.sh
Poky (Yocto Project Reference Distro) SDK installer version 4.0.9
=================================================================
Enter target directory for SDK (default: /opt/poky/4.0.9): toolchain
You are about to install the SDK to "/home/user/toolchain". Proceed [Y/n]?
Extracting SDK.................................................................................................................................................................................................................................................................................................................................done
Setting it up...done
SDK has been successfully set up and is ready to be used.
Each time you wish to use the SDK in a new shell session, you need to source the environment setup script e.g.
  $ . /home/user/toolchain/environment-setup-${CPUTYPE_32}-pokymllib32-linux-gnueabi
  $ . /home/user/toolchain/environment-setup-${CPUTYPE}-poky-linux

Create a test application:

$ echo -e '#include <stdio.h>\nint main(void) { printf("hello world\\n");}' > test.c

Setup the build environment variables:

$ . toolchain/environment-setup-${CPUTYPE}-poky-linux

Build the application:
```
$ ${CC} test.c -o test
```

Find the ip address of the board with the following command on the target:

# ifconfig eth0 | grep "/inet addr/"
          inet addr:192.168.1.110  Bcast:192.168.1.255  Mask:255.255.255.0

Upload application to the board by running the following command on the host:
```
$ scp test root@192.168.1.110:/tmp
```
Run the application on the board:
```
$ ssh root@192.168.1.110 /tmp/test
```

For more details, troubleshooting and information check the Synaptics Astra Yocto Guide.