Fix the build on OSX with libc 0.2.49

Several symbols are now marked as deprecated on OSX.  Fix the build by
marking these symbols' Nix wrappers as deprecated, too.

Author: asomers

CHANGELOG.md

@@ -29,6 +29,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
   ([#1020](https://github.com/nix-rust/nix/pull/1020))
 
 ### Removed
+- `Daemon`, `NOTE_REAP`, and `NOTE_EXIT_REPARENTED` are now deprecated on OSX
+  and iOS.
+  ([#1033](https://github.com/nix-rust/nix/pull/1033))
 
 ## [0.13.0] - 2019-01-15
 ### Added

src/sys/event.rs

@@ -135,6 +135,8 @@ libc_bitflags!(
         NOTE_EXEC;
         NOTE_EXIT;
         #[cfg(any(target_os = "macos", target_os = "ios"))]
+        #[deprecated( since="0.14.0", note="Deprecated since OSX 10.9")]
+        #[allow(deprecated)]
         NOTE_EXIT_REPARENTED;
         #[cfg(any(target_os = "macos", target_os = "ios"))]
         NOTE_EXITSTATUS;
@@ -183,6 +185,9 @@ libc_bitflags!(
         NOTE_PCTRLMASK;
         NOTE_PDATAMASK;
         #[cfg(any(target_os = "macos", target_os = "ios"))]
+        #[cfg(any(target_os = "macos", target_os = "ios"))]
+        #[deprecated( since="0.14.0", note="Deprecated since OSX 10.9")]
+        #[allow(deprecated)]
         NOTE_REAP;
         NOTE_RENAME;
         NOTE_REVOKE;

src/unistd.rs

@@ -828,6 +828,11 @@ pub fn execveat(dirfd: RawFd, pathname: &CString, args: &[CString],
 ///   descriptors will remain identical after daemonizing.
 /// * `noclose = false`: The process' stdin, stdout, and stderr will point to
 ///   `/dev/null` after daemonizing.
+#[cfg_attr(any(target_os = "macos", target_os = "ios"), deprecated(
+    since="0.14.0",
+    note="Deprecated in MacOSX 10.5"
+))]
+#[cfg_attr(any(target_os = "macos", target_os = "ios"), allow(deprecated))]
 pub fn daemon(nochdir: bool, noclose: bool) -> Result<()> {
     let res = unsafe { libc::daemon(nochdir as c_int, noclose as c_int) };
     Errno::result(res).map(drop)