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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Compilation is very slow

You might try switching to the “internal builder” and see if that speeds up compilation for you.

Project -> Properties -> C/C++ Build -> Builder Settings
Select builder type “Internal builder”

I also found that turning off “Build logging” (also under the C/C++ Build dialog) sped things up a bit.