Building Torizon Yocto Image offline

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Hello,

To build a Torizon Yocto image offline, especially when dealing with network restrictions like a company firewall, you can follow these steps to ensure all necessary resources are available locally:

1. Pre-download Required Resources:

   • Use a machine with internet access to download all necessary source files and dependencies. You can achieve this by running the bitbake command with the -c fetchall option, which will download all sources for your target image. Once downloaded, transfer these files to your offline build server.

2. Configure Local.conf for Offline Use:

   • In your local.conf file, set BB_NO_NETWORK = "1" to prevent any network access during the build process.
   • Set CONNECTIVITY_CHECK_URIS = "" to disable network connectivity checks.
   • Ensure that the DL_DIR variable in local.conf points to the directory where you have stored the pre-downloaded sources.

3. Use a Local Mirror:

   • If feasible, set up a local mirror for the Yocto downloads. This involves configuring the PREMIRRORS and MIRRORS variables in local.conf to point to your local server where the sources are stored.

4. Verify Certificates:

   • The error message you encountered suggests a problem with server certificate verification. Ensure that your build environment has the necessary CA certificates installed. You might need to configure Git to use a specific CA file or, as a last resort, disable SSL verification (though this is not recommended for production environments).

5. Troubleshoot Specific Errors:

   • The error related to fetcher_hashes_dummyfunc indicates a problem with fetching or verifying sources. Double-check that all sources are correctly downloaded and accessible from your offline server.

By following these steps, you should be able to configure your build environment to work offline, thus avoiding the network-related errors you are encountering. If issues persist, ensure that all paths and configurations are correctly set in your local.conf and other relevant configuration files.

I hope this helps you set up your offline build environment successfully.

Best regards,
Toradex AI Assistant.

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