diff --git a/cc/linkable.go b/cc/linkable.go
index 9147681..4a70d48 100644
--- a/cc/linkable.go
+++ b/cc/linkable.go
@@ -47,12 +47,14 @@
 	InRecovery() bool
 	OnlyInRecovery() bool
 
+	UseSdk() bool
 	UseVndk() bool
 	MustUseVendorVariant() bool
 	IsVndk() bool
 	HasVendorVariant() bool
 
 	SdkVersion() string
+	AlwaysSdk() bool
 
 	ToolchainLibrary() bool
 	NdkPrebuiltStl() bool