xsys is an effort to implement a thin and well-defined system API for enabling the development of programs that are portable; platform agnostic.

Instead of offering APIs for every imaginable programming language, xsys takes a more fundamental approach: The Linux syscall interface. To support a new platform a single function is implemented: syscall.

This makes it possible to run a program written for Linux on macOS—or WebAssembly, or Microsoft Windows—without having to make any changes to its source code.

How might xsys be interesting to me?

• For application developers: a way to make your programs run on many platforms with minimal changes to your code

• For compiler and programming-language authors: a way to target many platforms without having to implement whatever system API each platform uses.

• For OS/platform authors: allow more programs to run natively even if they weren't written specifically for your platform.