undefined identifier FILE for mingw

[Innot Sagg]

On Monday, 6 July 2020 at 20:55:29 UTC, Innot Sagg wrote:
> I apply this 
> https://github.com/ldc-developers/druntime/pull/106 fix the 
> issue.
>
>
> when I try build the betterC app, I get a lot undefined 
> symbol(same code work well on linux and osx):
>
>
> .__postblit()
> .__fieldPostblit()
> .__ctor()


this is the after ddemangle message. the original symbol is like:

Test__postblitMFZv
Test__fieldPostblitMFNaNbNiNfZv