Merge #1567

1567: Recent versions of Android support EPOLLEXCLUSIVE r=rtzoeller a=rtzoeller

[Corresponding libc change](rust-lang/libc@36be4cd).

Enable the epoll tests on Android, because they are passing.

Co-authored-by: Ryan Zoeller <rtzoeller@rtzoeller.com>

CHANGELOG.md

@@ -11,6 +11,8 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - Added fine-grained features flags.  Most Nix functionality can now be
   conditionally enabled.  By default, all features are enabled.
   (#[1611](https://github.com/nix-rust/nix/pull/1611))
+- Added `EPOLLEXCLUSIVE` on Android.
+  (#[1567](https://github.com/nix-rust/nix/pull/1567))
 
 ### Changed
 ### Fixed

src/sys/epoll.rs

@@ -18,8 +18,6 @@ libc_bitflags!(
         EPOLLERR;
         EPOLLHUP;
         EPOLLRDHUP;
-        #[cfg(target_os = "linux")]  // Added in 4.5; not in Android.
-        #[cfg_attr(docsrs, doc(cfg(all())))]
         EPOLLEXCLUSIVE;
         #[cfg(not(target_arch = "mips"))]
         EPOLLWAKEUP;

test/sys/mod.rs

@@ -30,7 +30,7 @@ mod test_ioctl;
 mod test_wait;
 mod test_uio;
 
-#[cfg(target_os = "linux")]
+#[cfg(any(target_os = "android", target_os = "linux"))]
 mod test_epoll;
 #[cfg(target_os = "linux")]
 mod test_inotify;