try to imagine this being reciprocated by Microsoft, then realize how self-defeating the concession is

Is the Microsoft C extension an open spec that is impliented and supported in non Microsoft compilers?

According to this comment[1], `-fms-extensions` flag adds C11 anonymous unions along with some properietary MS syntax[2].

In case this gets added, and Linux team later wants to go ahead with full C11 adoption and drop `-fms-extensions` in the future, wouldn't it cause headaches?

[1] https://stackoverflow.com/a/56554568/54937

[2] https://learn.microsoft.com/en-us/previous-versions/visualst...