adjust target os specific build tags

src/runtime/netpoll.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux
+
 package runtime
 
 // For debugging purposes this is used for all target architectures, but this is only valid for linux systems.
@@ -41,5 +43,5 @@ func poll_runtime_pollSetDeadline(pd *pollDesc, d int64, mode int) {
 //go:linkname poll_runtime_pollOpen internal/poll.runtime_pollOpen
 func poll_runtime_pollOpen(fd uintptr) (*pollDesc, int) {
 	// println("poll_runtime_pollOpen not implemented", fd)
-	return &pollDesc{runtimeCtx: 0x13371337}, pollNoError
+	return &pollDesc{runtimeCtx: uintptr(0xdeadbeef)}, pollNoError
 }

src/runtime/netpoll_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (js && wasm) || wasip1 || windows
+//go:build !linux
 
 package runtime
 

src/syscall/forklock_tinygo.go

@@ -1,4 +1,4 @@
-//go:build tinygo
+//go:build tinygo && linux && !wasip1 && !wasip2 && !darwin
 
 package syscall
 
@@ -35,4 +35,4 @@ func SetNonblock(fd int, nonblocking bool) (err error) {
 	return system.SetNonblock(fd, nonblocking)
 }
 
-type SysProcAttr struct{}
+// type SysProcAttr struct{}