[FR] Update BTT STM32H7 toolchains

[thurask]

Is your feature request related to a problem? Please describe.

Attempting to build Marlin for my board (BTT SKR3 STM32H723VG) on my ARM64 laptop (Pinebook Pro running Debian, VS Code + PlatformIO + AutoBuildMarlin) errors out during the build step:

luser@pbp:~/git/MarlinWorkzone$ platformio run -e STM32H723VG_btt ; echo "done" >|"/tmp/ipc"
Processing STM32H723VG_btt (board: marlin_STM32H723VG; platform: ststm32@15.4.1; framework: arduino)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Tool Manager: Installing platformio/toolchain-gccarmnoneeabi @ ~1.90201.0
UnknownPackageError: Could not find the package with 'platformio/toolchain-gccarmnoneeabi @ ~1.90201.0' requirements for your system 'linux_aarch64'

This is using commit 2a8c00b from bugfix-2.1.x and my own Configuration.h/Configuration_adv.h. The same commit and configuration build just fine on my Windows AMD64 laptop also using VSCode + PlatformIO + AutoBuildMarlin; that I can still build working Marlin just on a different machine is why I filed this as a feature request instead of an actual bug.

Are you looking for hardware support?

No response

Describe the feature you want

If I remove the pinned version of platform-ststm32 in stm32h7.ini (15.4.1 at time of writing) and use the latest platform-ststm32 (17.2.0) it does successfully download and install the toolchain (version 1.120301.0) for ARM64, but it runs into another issue with a dependency:

Compiling .pio/build/STM32H723VG_btt/FrameworkArduino/avr/dtostrf.c.o
Compiling .pio/build/STM32H723VG_btt/FrameworkArduino/board.c.o
/home/luser/.platformio/packages/framework-arduinoststm32@4.20200.221104/cores/arduino/avr/dtostrf.c: In function 'dtostrf':
/home/luser/.platformio/packages/framework-arduinoststm32@4.20200.221104/cores/arduino/avr/dtostrf.c:34:3: error: unknown type name 'uint8_t'
   34 |   uint8_t negative = 0;
      |   ^~~~~~~
/home/luser/.platformio/packages/framework-arduinoststm32@4.20200.221104/cores/arduino/avr/dtostrf.c:24:1: note: 'uint8_t' is defined in header '<stdint.h>'; did you forget to '#include <stdint.h>'?
   23 | #include <string.h>
  +++ |+#include <stdint.h>
   24 | 
*** [.pio/build/STM32H723VG_btt/FrameworkArduino/avr/dtostrf.c.o] Error 1

I feel that this would need attention from people more familiar with how Marlin works internally to make sure upgrading the toolchain doesn't throw any wrenches into anything, but at least it doesn't complain about the platform.

Additional context

Other than the added ARM64 host support I think this would be similar in spirit to #26585 ?

[ellensp]

you can upgrade to the following without code changes.

platform = ststm32@16.1.0
platform_packages = framework-arduinoststm32@~4.20500

but I have not tested beyond compiling.

Beyond that, requires research and code changes.

[thisiskeithb]

We’d like to update all platforms & toolchains to latest versions, but it’s a slow process, especially for boards/variants that need code updates.

[ellensp]

Want to try something? Using current bugfix.

STM32H723VG ONLY
Latest ststm32@17.2.0 with latest framework-arduinoststm32@4.20701.0

It builds, but I cant test it on real hardware. (built on Ubuntu 22.04.3 LTS on a AMD chip, no idea if its available for ARM64)
You do get a warning "warning: .pio/build/STM32H723VG_btt/firmware.elf has a LOAD segment with RWX permissions"

This is a very minimal config at this stage.

If this boots, try a real config see if it find any other issues

Diff removed, in favor of a PR

[thisiskeithb]

You do get a warning "warning: .pio/build/STM32H723VG_btt/firmware.elf has a LOAD segment with RWX permissions"

See d3f8049 for more info on this.

You’d add -Wl,--no-warn-rwx-segment to STM32H723VG_btt’s build_flags.