-void test_current(UChar data[][5], uint32_t size, uint32_t maxLen, uint8_t keys[][32]);
-void test_legacy(UChar data[][5], uint32_t size, uint32_t maxlen, uint8_t keys[][32]);
+extern "C" void test_current(UChar data[][5], uint32_t size, uint32_t maxLen, uint8_t keys[][32]);
+extern "C" void test_legacy(UChar data[][5], uint32_t size, uint32_t maxlen, uint8_t keys[][32]);