Add runtime warnings

constant/os.go

@@ -0,0 +1,37 @@
+package constant
+
+import (
+	"github.com/sagernet/sing-box/constant/goos"
+)
+
+const IsAndroid = goos.IsAndroid == 1
+
+const IsDarwin = goos.IsDarwin == 1
+
+const IsDragonfly = goos.IsDragonfly == 1
+
+const IsFreebsd = goos.IsFreebsd == 1
+
+const IsHurd = goos.IsHurd == 1
+
+const IsIllumos = goos.IsIllumos == 1
+
+const IsIos = goos.IsIos == 1
+
+const IsJs = goos.IsJs == 1
+
+const IsLinux = goos.IsLinux == 1
+
+const IsNacl = goos.IsNacl == 1
+
+const IsNetbsd = goos.IsNetbsd == 1
+
+const IsOpenbsd = goos.IsOpenbsd == 1
+
+const IsPlan9 = goos.IsPlan9 == 1
+
+const IsSolaris = goos.IsSolaris == 1
+
+const IsWindows = goos.IsWindows == 1
+
+const IsZos = goos.IsZos == 1