create mode 100644 std/c/posix.zig
 create mode 100644 std/c/posix/darwin.zig
 create mode 100644 std/c/posix/freebsd.zig
 create mode 100644 std/c/posix/netbsd.zig
 create mode 100644 std/c/posix/windows.zig
 delete mode 100644 std/os/darwin/errno.zig
 delete mode 100644 std/os/freebsd/errno.zig
 create mode 100644 std/os/linux/posix.zig
 create mode 100644 std/os/linux/posix/arm64.zig
 create mode 100644 std/os/linux/posix/x86_64.zig
 delete mode 100644 std/os/netbsd/errno.zig
 create mode 100644 std/os/wasi/posix.zig
 delete mode 100644 std/os/windows/errno.zig
 create mode 100644 std/os/windows/posix.zig