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Microsoft is making its Windows Subsystem for Linux (WSL) open-source today, opening up the code for community members to contribute to. After launching WSL for Windows 10 nearly nine years ago, it has been a multiyear effort at Microsoft to open-source the feature that enables a Linux environment within Windows.
“It has been a consistent request from the developer community for some time now,” says Windows chief Pavan Davuluri in an interview with The Verge. “It took us a little bit of time, because we needed to refactor the operating system to allow WSL to live in a standalone capacity that then allowed us to open-source the project and be able to have developers go and make contributions and for us to ingest those into the Windows pipeline and ship it at scale.”
Wait, what? Didn’t it have a pile of GPL code in it to begin with? Were they violating those licenses until now?
I imagine it emulates all the system calls. It sure would have been easier to copy bits from Linux for that. But you don’t have to. Wine sure didn’t.
I probably should go read the code and not guess.