Compile error on Windows and Linux, only normal compile on MAC, but there are still problems

[Conmi-WhiteJoker]

version: Core 4.3.3·Home 3.2.2

question: There was a compilation error on Windows and Linux, and even with clang installed, the compilation failed~~

expect: Can be used on Windows and Linux~~

[Conmi-WhiteJoker]

[cednik]

I found the same problem, triing to compile new empty project.
PIO Core 4.3.3 on VSCode, Win10x64.
After renaming main.cpp to main.c and remove warnings form HardwareSerial.c, weak_atexit.c and WInterrupts.c, I stucked on Error 309, described in Issue #12.

[Conmi-WhiteJoker]

Thank you for your help,cednik.