Compilation error (<bits/c++config.h> missing), running in Portable mode

[wowtah]

Describe the bug
I am running a fresh Arduino IDE 1.8.19 in Portable mode. Trying to compile (an empty) sketch for STM32F4 board, compilation fails with this error:

In file included from d:\my\long\path\starts\with\this\arduino-1.8.19\portable\packages\stmicroelectronics\tools\xpack-arm-none-eabi-gcc\10.2.1-1.1\arm-none-eabi\include\c++\10.2.1\stdlib.h:36,
                 from d:\my\long\path\starts\with\this\arduino-1.8.19\portable\packages\STMicroelectronics\hardware\stm32\2.1.0\cores\arduino/wiring.h:24,
                 from d:\my\long\path\starts\with\this\arduino-1.8.19\portable\packages\STMicroelectronics\hardware\stm32\2.1.0\cores\arduino/Arduino.h:36,
                 from sketch\sketch_feb23a.ino.cpp:1:
d:\my\long\path\starts\with\this\arduino-1.8.19\portable\packages\stmicroelectronics\tools\xpack-arm-none-eabi-gcc\10.2.1-1.1\arm-none-eabi\include\c++\10.2.1\cstdlib:41:10: fatal error: bits/c++config.h: No such file or directory
   41 | #include <bits/c++config.h>
      |          ^~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Error compiling for board Generic STM32F4 series.

To Reproduce

1. Download Arduino IDE (1.8.19) as ZIP, for Windows
2. Extract ZIP-file, create folder 'portable' (in the extracted folder) to make it into a portable Arduino IDE
3. Start Arduino.exe
4. Preferences -> add Boards manager URL: https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json
5. Go to Boards manager, Install 'STM32 MCU based boards' version 2.2.0
6. Switch board to 'Generic STM32F4 series' -> 'STM32F411CEUx'
7. Compile the (empty) sketch
8. Error (see above) occurs

Expected behavior
I expect a clean install to compile an empty sketch :)

Desktop:

• OS: Windows 10
• Arduino IDE version: 1.8.19
• STM32 core version: 2.2.0 (problem also occured with 2.1.0)
• Tools menu settings if not the default: 'Generic STM32F4 series' -> 'STM32F411CEUx'

Board:

• Name: STM32F411CEU6

[fpistm]

Hi @wowtah
This errors comes from an issue with the long path name.
Try to shorten the path where Arduino IDE is installed and it should works.
I have no other solution for you as it is linked to the IDE on Windows.

Related topic:
https://www.stm32duino.com/viewtopic.php?t=1160
arduino/Arduino#10754 (anyway this not solve all the issue).... 😕

[wowtah]

Using a shorter path fixed it :) thanks!