ESP8266 stdint.h missing


C:\Users\ats37.platformio\packages\framework-arduinoespressif8266\cores\esp8266/Arduino.h:27:10: fatal error: stdlib.h: No such file or directory

Since this morning I have this problem.

I tried pio pkg update -g -p espressif8266 with no Success

Sounds like corrupted toolchain to me. Delete all folders C:\Users\ats37.platformio\packages\toolchain-xtensa (or similiarly xtensa named) and rebiuld.

I already did this, same result. I deleted espressif8266 Folder.

I deleted framework-arduinoespressif8266 PlatformIO installs the core but in this folder ist not one Lib what starts with std*.h

I deleted the whole PlatFormIO Folders and now it works again how odd.