fix many configurations

include/servicepoint.h

@@ -225,6 +225,9 @@ typedef struct SPBitVec SPBitVec;
  */
 typedef struct TypedCommand TypedCommand;
 
+/**
+ * This is a type only used by cbindgen to have a type for pointers.
+ */
 typedef struct UdpSocket UdpSocket;
 
 /**

src/lib.rs

@@ -68,4 +68,5 @@ pub(crate) unsafe fn heap_remove<T>(x: NonNull<T>) -> T {
     unsafe { *Box::from_raw(x.as_ptr()) }
 }
 
+/// This is a type only used by cbindgen to have a type for pointers.
 pub struct UdpSocket;