Separate HorizonOS hostent from newlib module

src/unix/newlib/horizon/mod.rs

@@ -21,6 +21,14 @@ pub type sbintime_t = ::c_longlong;
 pub type sigset_t = ::c_ulong;
 
 s! {
+    pub struct hostent {
+        pub h_name: *mut ::c_char,
+        pub h_aliases: *mut *mut ::c_char,
+        pub h_addrtype: u16,
+        pub h_length: u16,
+        pub h_addr_list: *mut *mut ::c_char,
+    }
+
     pub struct sockaddr {
         pub sa_family: ::sa_family_t,
         pub sa_data: [::c_char; 26usize],

src/unix/newlib/mod.rs

@@ -53,6 +53,21 @@ cfg_if! {
     }
 }
 
+cfg_if! {
+    if #[cfg(not(target_os = "horizon"))] {
+        s!{
+            pub struct hostent {
+                pub h_name: *mut ::c_char,
+                pub h_aliases: *mut *mut ::c_char,
+                pub h_addrtype: ::c_int,
+                pub h_length: ::c_int,
+                pub h_addr_list: *mut *mut ::c_char,
+                pub h_addr: *mut ::c_char,
+            }
+        }
+    }
+}
+
 s! {
     // The order of the `ai_addr` field in this struct is crucial
     // for converting between the Rust and C types.
@@ -90,26 +105,6 @@ s! {
         pub s_addr: ::in_addr_t,
     }
 
-    pub struct hostent {
-        pub h_name: *mut ::c_char,
-        pub h_aliases: *mut *mut ::c_char,
-
-        #[cfg(not(target_os = "horizon"))]
-        pub h_addrtype: ::c_int,
-        #[cfg(target_os = "horizon")]
-        pub h_addrtype: u16,
-
-        #[cfg(not(target_os = "horizon"))]
-        pub h_length: ::c_int,
-        #[cfg(target_os = "horizon")]
-        pub h_length: u16,
-
-        pub h_addr_list: *mut *mut ::c_char,
-
-        #[cfg(not(target_os = "horizon"))]
-        pub h_addr: *mut ::c_char,
-    }
-
     pub struct pollfd {
         pub fd: ::c_int,
         pub events: ::c_int,