diff --git a/native/test.c b/native/test.cpp
similarity index 98%
rename from native/test.c
rename to native/test.cpp
index fc7cf93..65095f1 100644
--- a/native/test.c
+++ b/native/test.cpp
@@ -4,13 +4,13 @@
 #include <assert.h>
 #include <stdio.h>
 
-VkSurfaceKHR vkCreateSurfaceGFX(VkInstance);
+extern "C" VkSurfaceKHR vkCreateSurfaceGFX(VkInstance);
 
 int main() {
     printf("starting the portability test\n");
 
     VkInstance instance;
-    VkResult res = 0;
+    VkResult res = (VkResult)0;
     unsigned int i;
 
     VkInstanceCreateInfo inst_info = {};