Switch to using WAPP_PLATFORM_CPP instead of __cplusplus

src/uuid/uuid.h

@@ -2,11 +2,12 @@
 #define UUID_H
 
 #include "../common/aliases/aliases.h"
+#include "../common/platform/platform.h"
 #include "../core/strings/str8/str8.h"
 
-#ifdef __cplusplus
+#ifdef WAPP_PLATFORM_CPP
 BEGIN_C_LINKAGE
-#endif // __cplusplus
+#endif // WAPP_PLATFORM_CPP
 
 #define UUID_BUF_LENGTH 48
 #define WAPP_UUID_SPEC WAPP_STR8_SPEC
@@ -27,8 +28,8 @@ struct uuid {
 // If the pointer is NULL, it skips initialisation.
 UUID *wapp_uuid_init_uuid4(UUID *uuid);
 
-#ifdef __cplusplus
+#ifdef WAPP_PLATFORM_CPP
 END_C_LINKAGE
-#endif // __cplusplus
+#endif // WAPP_PLATFORM_CPP
 
 #endif // !UUID_H