#buildroot

Stop Guessing Why Your Embedded Linux Apps Are Crashing! 🛠️

Debugging segmentation faults and stack overflows on platforms like the OK3568 can be a nightmare when serial logs aren't enough. If you’re working with Linux Kernel 5.10 and Buildroot, enabling Core Dumps is a game-changer for your development workflow.

A Core Dump is essentially a "black box" recorder for your software. When a process fails, it saves the memory image, registers, and call stack, allowing you to perform offline analysis using GDB without needing the hardware in front of you.

Key Takeaways from my latest guide:

✅ How to bypass the default "disabled" status in Buildroot.

✅ Setting persistent storage paths (e.g., /userdata/core).

✅ Essential GDB commands like bt (backtrace) to pinpoint the exact line of code that failed.

✅ Best practices for production vs. R&D environments.

⚙️ How to Configure and Port Library Files via Buildroot on the RK3568 Platform

The Rockchip RK3568 is a high-performance, industrial-grade processor featuring a quad-core Cortex-A55, integrated GPU, and NPU. It is widely applied in edge computing, industrial control, and IoT systems requiring high reliability and scalability.

To streamline Linux development on RK3568, Buildroot provides a fast, modular toolchain that helps developers customize and generate embedded Linux root file systems efficiently.

🧩 Buildroot Configuration Highlights 1️⃣ Navigate to OK3568-linux-source/buildroot/output/OK3568/ and run make menuconfig 2️⃣ Use / to search for specific libraries (e.g., Python3) 3️⃣ Enable required packages and save configuration 4️⃣ Recompile Buildroot with ./build.sh buildroot 5️⃣ Flash the generated rootfs.ext2 image to your development board

🚀 Include Your Files Directly in Buildroot for OK3562!

Tired of manually copying programs, libraries, or configurations to your development board after flashing an image? Here’s a better way:

✅ Method 1 – Directly include in source code: ⚫ Add files to fsoverlay directories ⚫ Compile with ./build.sh all ⚫ Files are permanently included in future builds

✅ Method 2 – Mount rootfs.ext2: ⚫ Quickly add files to a compiled image ⚫ Perfect for temporary changes ⚫ Flash updated image to see changes

📌 Tip: For large files, expand rootfs.ext2 first.

These methods save time, avoid manual errors, and streamline embedded development on OK3562.

Porting LVGL 8.2 on OK3568-C Under Linux 4.19 (Buildroot) We've published a detailed, hands-on guide for bringing LVGL 8.2 to life on the Forlinx OK3568-C platform, built on Linux 4.19 and powered by Buildroot.

🛠️ The guide walks through:

Source setup and framebuffer integration

Touchscreen calibration via evdev

Display and resolution configuration

Cross-compilation tips with aarch64 toolchain

Full demo testing and optimization

This is ideal for developers building UI solutions in embedded HMI, smart control panels, and industrial displays using open-source technologies.

Want to customize your embedded Linux system with Buildroot on the Forlinx OK3588-C platform?

This step-by-step guide walks you through compiling Buildroot 5.10.209, adding system tools like OpenCV4, and preparing a complete cross-compilation environment.

New Guide: GPIO Control with libgpiod on OK3568-C SBC

Easily manage GPIOs on the OK3568-C development board using libgpiod under Buildroot (Linux 4.19.206). Step-by-step commands, real examples, and tips to get started fast.

👉 Read the full guide here:

Buildroot App Integration on Allwinner A40i: Step-by-Step

1️⃣ Create package/helloworld directory

2️⃣ Write Config.in + helloworld.mk (case-sensitive!)

3️⃣ Enable in sun8iw11p1_hf_defconfig

4️⃣ make menuconfig → compile → pack

💡 Key Insights:

.mk scripts glue Buildroot’s build system to your app’s Makefile

Error Alert: Directly overwriting .config breaks builds! Use savedefconfig instead

Final binary lands in /bin post-compilation 📦

Allwinner A40i system on module