wolf-os-cpp

A C++ system test application for Wolf-OS but could be suited for other (Linux-based) boards supported by dockcross.
This project is designed to validate compilation and linking of standard C++17 libraries alongside common Linux/POSIX system headers and syscalls.

Features

• Uses modern C++17 (e.g., std::thread, std::optional, std::function)
• Tests Linux syscalls: fork, socket, open, readdir, etc.
• Targets ARMv5 via cross-compilation using dockcross: https://github.com/dockcross/dockcross?tab=readme-ov-file

What It Tests

• STL containers, algorithms, threading, atomics
• Linux syscalls: file I/O, sockets, processes, memory mapping
• C++ and system header inclusion and linking

Prerequisites

• Docker installed
• Git
• Optional CMake ≥ 3.30 for host compilation

Setup and Build

1. Clone the Repository

git clone https://github.com/kptr-juku/wolf-os-cpp.git
cd wolf-os-cpp

2. Set Up dockcross for ARMv5

docker run --rm dockcross/linux-armv5 > ./dockcross
chmod +x dockcross

3. Build the Project with dockcross

./dockcross cmake -Bbuild .
./dockcross cmake --build build

The resulting binary (wolf-cpp) will be cross-compiled for ARMv5 and placed in the build/ directory.

4. Upload to the device or include in the distro

Upload and test now:

scp -O build/wolf-cpp root@<IP>:/tmp/

Include in the distro - https://github.com/FoxIoT-EU/foxiot-wolf-os/blob/docs/docs/developer-quick-start.md#adding-your-application-to-the-firmware

Customization

To test additional libraries or headers, modify main.cc and rebuild using the same commands above.

📚 Resources

• Wolf-OS: https://github.com/FoxIoT-EU/foxiot-wolf-os
• Dockcross: https://github.com/dockcross/dockcross?tab=readme-ov-file
• CMake: https://cmake.org/documentation/
• Crosstool-NG / GCC: https://crosstool-ng.github.io/

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Happy compiling 🚀