CMake-based pub/sub example using score::mw::com — with ARM64 cross-compilation support

[tfa2si]

Hi all 👋

Following up on my earlier post about ARM64 cross-compilation, I've put together a minimal publisher/subscriber example using score::mw::com that builds with CMake (instead of Bazel) and supports both x86 and ARM64 (e.g. Raspberry Pi 5).

This is useful if you want to integrate the middleware into your own CMake-based project without being tied to the Bazel build system.

What it does:

Builds a fat static library (libmw_com.a) from the middleware using Bazel, then exposes it as a standard find_package(MwCom) CMake target
No runtime dependencies to copy to the target — everything is statically linked
Tested on Ubuntu 22.04/24.04 host → Raspberry Pi 5 (ARM64)
Repos:

Example: https://github.com/tfa2si/score-pubsub-cmake-example
ARM64 toolchain bootstrap (if your apt repo is broken): https://github.com/tfa2si/bazel-aarch64-cross-bootstrapHi all 👋

Following up on my earlier post about ARM64 cross-compilation, I've put together a minimal publisher/subscriber example using score::mw::com that builds with CMake (instead of Bazel) and supports both x86 and ARM64 (e.g. Raspberry Pi 5).

This is useful if you want to integrate the middleware into your own CMake-based project without being tied to the Bazel build system.

What it does:

Builds a fat static library (libmw_com.a) from the middleware using Bazel, then exposes it as a standard find_package(MwCom) CMake target
No runtime dependencies to copy to the target — everything is statically linked
Tested on Ubuntu 22.04/24.04 host → Raspberry Pi 5 (ARM64)
Repos:

Example: https://github.com/tfa2si/score-pubsub-cmake-example
ARM64 toolchain bootstrap (if your apt repo is broken): https://github.com/tfa2si/bazel-aarch64-cross-bootstrap

# Build sysroot (x86)
./setup_score_sysroot.sh /path/to/communication

# Build sysroot (ARM64)
./setup_score_sysroot.sh /path/to/communication --cpu=arm64

# CMake build
mkdir build/cmake_build && cd build/cmake_build
cmake -DCMAKE_PREFIX_PATH=../score_mw_sysroot ../..
make -j$(nproc)

Happy to hear feedback or ideas on how this could be improved or integrated upstream!