SW4STM32 and SW4Linux fully supports the STM32MP1 asymmetric multicore Cortex/A7+M4 MPUs

   With System Workbench for Linux, Embedded Linux on the STM32MP1 family of MPUs from ST was never as simple to build and maintain, even for newcomers in the Linux world.
And, if you install System Workbench for Linux in System Workbench for STM32 you can seamlessly develop and debug asymmetric applications running partly on Linux, partly on the Cortex-M4.
You can get more information from the ac6-tools website and download two short videos (registration required) highlighting:

System Workbench for STM32

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How to C++ project for dummies

There’s a few tutorials kicking around here; I followed them and am working with C++ and CubeMX generated projects just fine.

Here’s a couple of points you’re not going to get until you do some reading.

(1) C and C++ link differently. C++ uses a thing called name mangling. You need to be careful in keeping your C and C++ code in separate sources files if you can manage it. Google for the exact phrase ‘extern “C” and calling C from C++’ and you will get hours of relevant reading material.

(2) if you’re using CubeMX, don’t fight the code generator; note the “user code goes here” sections, put your C++ code in a different folder and add that folder to your includes in the compiler settings. You’ll have much more success if you do that because then you can regenerate your code with CubeMX without mangling all the work you did to get the C++ linkage working.

I will see if I can do a simple “hello world” c++ example at some point because I have a project template that’s working well for me now.