diff --git a/cc/linkable.go b/cc/linkable.go
index 80cd6b8..fbe61a4 100644
--- a/cc/linkable.go
+++ b/cc/linkable.go
@@ -45,12 +45,14 @@
 	InRecovery() bool
 	OnlyInRecovery() bool
 
+	UseSdk() bool
 	UseVndk() bool
 	MustUseVendorVariant() bool
 	IsVndk() bool
 	HasVendorVariant() bool
 
 	SdkVersion() string
+	AlwaysSdk() bool
 
 	ToolchainLibrary() bool
 	NdkPrebuiltStl() bool