pkgName is from interop config "pkg" and in a format of "x.y.z", so we should replace "." with "_" instead of "/". Related Issue: https://github.com/JetBrains/kotlin-native/issues/490

Interop/StubGenerator/src/main/kotlin/org/jetbrains/kotlin/native/interop/gen/jvm/StubGenerator.kt

@@ -1188,7 +1188,7 @@ class StubGenerator(
     private val FunctionDecl.cStubName: String
         get() {
             require(platform == KotlinPlatform.NATIVE)
-            return "kni_" + pkgName.replace('/', '_') + '_' + this.name
+            return "kni_" + pkgName.replace('.', '_') + '_' + this.name
         }
 
     private val FunctionDecl.kotlinExternalName: String