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

I have a theory - or at least a partial one - why builds may be slow when using the external (make) builder and networking is enabled.

It may have something to do with the executable search PATH (environment variable) pointing to locations on network resources. Or, perhaps something within Eclipse’s build system is doing a PATH-driven search to find the toolchain executables, or maybe make is doing this.

It is just a theory - completely untested - that occurred to me while I was reading this thread.