Monthly Archives: August 2021

C++20 modules with GCC11

Director at Feabhas Limited
Co-Founder and Director of Feabhas since 1995.
Niall has been designing and programming embedded systems for over 30 years. He has worked in different sectors, including aerospace, telecomms, government and banking.
His current interest lie in IoT Security and Agile for Embedded Systems.


One of the headline changes of the C++20 standard is the inclusion of modules. Modules promise to significantly change the structure of C++ codebases and possibly signal headers’ ultimate demise (but probably not in my lifetime). It also opens the door to potentially have a unified build system and package manager, similar to Rust’s Cargo package manager; though I imaging standardising a unified build system would be one bloody battle.

Pre-C++20 builds

If you want to start a heated debate on any […]

Posted in C/C++ Programming | Tagged , | 8 Comments

CMake Part 3 – Source File Organisation

Associate Instructor at Feabhas Ltd
An independent IT trainer Martin has over 40 years academic and commercial experience in open systems software engineering. He has worked with a range of technologies from real time process controllers, through compilers, to large scale parallel processing systems; and across multiple sectors including industrial systems, semi-conductor manufacturing, telecomms, banking, MoD, and government.
Martin Bond
Latest posts by Martin Bond (see all)

In previous blog posts in this series (Part 1 and Part 2), I looked at using CMake to configure a build for a cross compilation to target hardware such as the STM32F4 Series. In this blog post I will look at how to configure project source code, identify subsystems and use CMake to manage the build for each subsystem.

In our training courses, we have identified two shared subsystems: the bare metal code used to initialise the C/C++ run time system […]

Posted in ARM, Build-systems, C/C++ Programming, CMSIS, Cortex, Toolchain | Tagged , | 2 Comments