Implement PartialEq,Eq for all types

Cargo.toml

@@ -27,6 +27,7 @@ default = ["use_std"]
 use_std = []
 align = []
 rustc-dep-of-std = ['align', 'rustc-std-workspace-core']
+extra_traits = ["align"]
 
 [workspace]
 members = ["libc-test"]

README.md

@@ -44,6 +44,15 @@ activate the *align* feature. This requires Rust 1.25 or newer:
 libc = { version = "0.2", features = ["align"] }
 ```
 
+All structs implemented by the libc crate have the `Copy` and `Clone` traits
+implemented for them. The additional traits of `PartialEq` and `Eq` can be
+enabled with the *extra_traits* feature (requires Rust 1.25 or newer):
+
+```toml
+[dependencies]
+libc = { version = "0.2", features = ["extra_traits"] }
+```
+
 ## What is libc?
 
 The primary purpose of this crate is to provide all of the definitions necessary

src/macros.rs

@@ -39,11 +39,20 @@ macro_rules! s {
         __item! {
             #[repr(C)]
             $(#[$attr])*
+            #[derive(Clone, Copy)]
+            #[cfg_attr(feature = "extra_traits", derive(Eq, PartialEq))]
             pub $t $i { $($field)* }
         }
-        impl ::dox::Copy for $i {}
-        impl ::dox::Clone for $i {
-            fn clone(&self) -> $i { *self }
+    )*)
+}
+
+macro_rules! s_no_extra_traits {
+    ($($(#[$attr:meta])* pub $t:ident $i:ident { $($field:tt)* })*) => ($(
+        __item! {
+            #[repr(C)]
+            $(#[$attr])*
+            #[derive(Clone, Copy)]
+            pub $t $i { $($field)* }
         }
     )*)
 }