Make ifaddrs.ifa_ifu an union

Author: kellda

libc-test/build.rs

@@ -2836,6 +2836,9 @@ fn test_emscripten(target: &str) {
     });
 
     cfg.skip_struct(move |ty| {
+        if ty.starts_with("__c_anonymous_") {
+            return true;
+        }
         match ty {
             // FIXME: It was removed in
             // emscripten-core/emscripten@953e414

src/fuchsia/mod.rs

@@ -465,7 +465,7 @@ s! {
         pub ifa_flags: ::c_uint,
         pub ifa_addr: *mut ::sockaddr,
         pub ifa_netmask: *mut ::sockaddr,
-        pub ifa_ifu: *mut ::sockaddr, // FIXME This should be a union
+        pub ifa_ifu: __c_anonymous_ifa_ifu,
         pub ifa_data: *mut ::c_void,
     }
 
@@ -1046,6 +1046,11 @@ s_no_extra_traits! {
         pub sival_int: ::int,
         pub sival_ptr: *mut ::c_void,
     }
+
+    pub union __c_anonymous_ifa_ifu {
+        ifu_broadaddr: *mut sockaddr,
+        ifu_dstaddr: *mut sockaddr,
+    }
 }
 
 cfg_if! {
@@ -1357,6 +1362,12 @@ cfg_if! {
                 f.debug_struct("sigval").finish_non_exhaustive()
             }
         }
+
+        impl ::fmt::Debug for __c_anonymous_ifa_ifu {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("ifa_ifu").finish_non_exhaustive()
+            }
+        }
     }
 }
 

src/unix/linux_like/mod.rs

@@ -159,7 +159,7 @@ s! {
         pub ifa_flags: ::c_uint,
         pub ifa_addr: *mut ::sockaddr,
         pub ifa_netmask: *mut ::sockaddr,
-        pub ifa_ifu: *mut ::sockaddr, // FIXME This should be a union
+        pub ifa_ifu: __c_anonymous_ifa_ifu,
         pub ifa_data: *mut ::c_void,
     }
 
@@ -257,6 +257,11 @@ s_no_extra_traits! {
         #[cfg(target_pointer_width = "32")]
         __unused1: [::c_int; 12],
     }
+
+    pub union __c_anonymous_ifa_ifu {
+        ifu_broadaddr: *mut sockaddr,
+        ifu_dstaddr: *mut sockaddr,
+    }
 }
 
 cfg_if! {
@@ -412,6 +417,12 @@ cfg_if! {
                     .finish()
             }
         }
+
+        impl ::fmt::Debug for __c_anonymous_ifa_ifu {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("ifa_ifu").finish_non_exhaustive()
+            }
+        }
     }
 }