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

Error: sorry, unimplemented: Thumb-1 hard-float VFP ABI - SOLVED

I have experienced difficulties getting the target device selection to “stick”, that is, be set and saved properly once set.

One normally sets the target device by navigating through this menu sequence:
Project -> Properties -> C/C++ Build (left list) -> Settings (left list) -> Target (tab)

There are several drop-down lists on this tab that let you select device Series, MCU, and Board.

I have found that this setting is often distorted, reverted or otherwise not set properly if I change it. This is especially true if I’m using Eclipse’s “Build Configurations” capability so I can have several different build configurations for a single project (e.g. different #defines and compiler settings for a “Debug” configuration vs. a “Release” configuration).

These problem(s) existed in the 1.10.x version of the AC6 tools, I just got the 1.11.x update today but have not checked to see if this issue has been fixed.