I’m using a Nucleo STM32F411RE and I created an Arduino project with it.
Now my problem: I’ve copied a working code (on arduino uno) to the STM32 Arduino project and tried building it. It now can’t find the library “avr/sleep.h”.
The paths in the “Arduino Settings” windows are exactly the same.

Why isn’t the STM32 Arduino project able to locate the file?
I’ve downloaded the STM32F4 generic series file while setting the project up.

My VisualGDB version is: 5.5 Preview 2 build 3410

Loading cached code model from C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\VisualGDBCache\STM32_MIOTY_LORA_LIKE_Dragino_SendString-Debug-Generic_STM32F4_series\BuildCommandLines.txt…
Failed to parse code model from C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\VisualGDBCache\STM32_MIOTY_LORA_LIKE_Dragino_SendString-Debug-Generic_STM32F4_series\CodeModel.json:System.Exception: Arduino code model did not report any sketch sources
at vu2.p.b_2(IEnumerable`1 a)
Compiler output:
In file included from C:\Users\gwerderj\Documents\Arduino\Libraries\ts-unb-node-rfm95_LIKE_BOARD/at-protocol.h:18,
from C:\Users\gwerderj\Documents\Arduino\Libraries\ts-unb-node-rfm95_LIKE_BOARD/ts-unb-node.h:26,
from C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\sketches\STM32_MIOTY_LORA_LIKE_Dragino_SendString.ino:13:
C:\Users\gwerderj\Documents\Arduino\Libraries\ts-unb-node-rfm95_LIKE_BOARD/atmega328p.h:20:10: fatal error: avr/sleep.h: No such file or directory
#include <avr/sleep.h>
^~~~~~~~~~~~~
compilation terminated.
Checking if any source files need uploading…
Checking for file modifications…
Found changed files since last query (see C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\VisualGDBCache\STM32_MIOTY_LORA_LIKE_Dragino_SendString-Debug-Generic_STM32F4_series\BuildFileStats.txt.old vs C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\VisualGDBCache\STM32_MIOTY_LORA_LIKE_Dragino_SendString-Debug-Generic_STM32F4_series\BuildFileStats.txt.new). Rerunning code model query..
Saved the code model to C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\VisualGDBCache\STM32_MIOTY_LORA_LIKE_Dragino_SendString-Debug-Generic_STM32F4_series\BuildCommandLines.txt
Failed to parse code model from C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\VisualGDBCache\STM32_MIOTY_LORA_LIKE_Dragino_SendString-Debug-Generic_STM32F4_series\CodeModel.json:System.Exception: Arduino code model did not report any sketch sources
at vu2.p.b_2(IEnumerable`1 a)
Compiler output:
In file included from C:\Users\gwerderj\Documents\Arduino\Libraries\ts-unb-node-rfm95_LIKE_BOARD/at-protocol.h:18,
from C:\Users\gwerderj\Documents\Arduino\Libraries\ts-unb-node-rfm95_LIKE_BOARD/ts-unb-node.h:26,
from C:\Users\gwerderj\source\repos\STM32_MIOTY_LORA_LIKE_Dragino_SendString\sketches\STM32_MIOTY_LORA_LIKE_Dragino_SendString.ino:13:
C:\Users\gwerderj\Documents\Arduino\Libraries\ts-unb-node-rfm95_LIKE_BOARD/atmega328p.h:20:10: fatal error: avr/sleep.h: No such file or directory
#include <avr/sleep.h>
^~~~~~~~~~~~~
compilation terminated.

========== Project Configuration Summary ==========
STM32_MIOTY_LORA_LIKE_Dragino_SendString configured in 00:11
========== Configuration: 1 Succeeded, 0 Failed ==========