build: separate compiler and libs

compiler/internal/lib/os/pipe_wasm.go

@@ -0,0 +1,16 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build wasm
+
+package os
+
+import "syscall"
+
+// Pipe returns a connected pair of Files; reads from r return bytes written to w.
+// It returns the files and an error, if any.
+func Pipe() (r *File, w *File, err error) {
+	// Neither GOOS=js nor GOOS=wasip1 have pipes.
+	return nil, nil, NewSyscallError("pipe", syscall.ENOSYS)
+}