Generating Yocto Toolchain with Qt6 for Jetson Orin Nano

Issue Overview

The user is attempting to generate a Yocto toolchain that includes Qt6 for an NVIDIA Jetson Orin Nano board without generating the full image. The process fails during the compilation of rust-native, which is a dependency for the toolchain. The error occurs while building the meta-toolchain-qt6 target using BitBake.

Possible Causes

1. Incompatibility between the selected versions of Yocto (Kirkstone), Qt6 (6.5.3), and Rust (1.59.0)
2. Insufficient system resources, particularly memory, leading to the rustc process being terminated
3. Corrupted or incomplete source files for Rust
4. Issues with the Rust compiler itself when building for the target architecture
5. Conflicts in the build environment or configuration files

Troubleshooting Steps, Solutions & Fixes

1. Check system resources:
   Ensure your build machine has sufficient RAM and CPU cores. Rust compilation can be resource-intensive. Try increasing the number of parallel jobs:

   BB_NUMBER_THREADS ?= "8"
   PARALLEL_MAKE ?= "-j 8"
   

2. Clean and rebuild:
   Remove the rust-native build directory and try again:

   bitbake -c cleansstate rust-native
   bitbake meta-toolchain-qt6
   

3. Update Rust version:
   Try using a more recent version of Rust by modifying the rust recipe. In your local.conf, add:

   PREFERRED_VERSION_rust = "1.60.%"
   PREFERRED_VERSION_rust-native = "1.60.%"
   

4. Examine detailed logs:
   Check the full compile log for rust-native:

   cat /home/oukache/Dev/Yocto_Jetson-Orin-Nano/build/tmp/work/x86_64-linux/rust-native/1.59.0-r0/temp/log.do_compile.30247
   

   Look for specific error messages or warnings that might provide more insight.

5. Verify Yocto layer compatibility:
   Ensure all layers (poky, meta-tegra, meta-qt6, meta-openembedded) are compatible with the Kirkstone branch. Check each layer’s documentation for any known issues or specific requirements.

6. Try without Qt6:
   Temporarily remove Qt6 from the build to isolate the issue:
   Comment out Qt-related lines in your local.conf and bblayers.conf, then attempt to build a basic toolchain:

   bitbake meta-toolchain
   

7. Update build tools:
   Ensure your host system has the latest required build tools. For Ubuntu:

   sudo apt-get update
   sudo apt-get upgrade
   sudo apt-get install build-essential python3 git chrpath diffstat
   

8. Check for disk space:
   Verify that you have sufficient free disk space for the build. Yocto builds can consume significant storage.

9. Rust compiler flags:
   If the issue persists, try adding the following to your local.conf to modify Rust compiler behavior:

   RUSTFLAGS += "-C link-arg=-Wl,-z,stack-size=8388608"
   

10. Consider using a stable JetPack version:
    Instead of manually integrating Qt6, consider using a stable JetPack version that includes Qt. This might provide a more reliable starting point for your custom toolchain.

If none of these steps resolve the issue, consider reaching out to the Yocto Project mailing list or NVIDIA Jetson developer forums with the full build logs and your configuration files for more specialized assistance.