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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 (registration required) various documents highlighting:

System Workbench for STM32


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Compiler Documentation

What is the meaning of the caret symbol below the first letter of the “message” token? This caret looks to me to be an error indicator. The message token is not included as valid for #pragma in the “ARM Compiler toolchain Compiler Reference”:
http://infocenter.arm.com/help/topic/com.arm.doc.dui0491i/DUI0491I_arm_compiler_reference.pdfQuestion
which I found after starting this thread.

When I used “#pragma message ...” these did not appear in the output under the Console tab in the expected order. This is another indication to me that this is an error message, and not a message directive the compiler was executing.

I ended up doing what I needed to do with the #warn directive. These gave me the expected results and were useful in finding the source of the compiler errors I was seeking.