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

Why compiling structure in Keil works, and not in SW?

I can’t say why it works with Keil, but from what I can see, the fputc() function defines parameter as type FILE, whereas the struct declaration in the header is named __FILE (two leading underscores).

inputFunctionPointer and outputFunction pointers are members of the __FILE struct, but are _not_ members of FILE.

I would also advise that __FILE be declared as a type, like this:

typdef struct