From 22f2afe21e5decae46ee76ee22aa10d51daaed4b Mon Sep 17 00:00:00 2001
From: Ed Barnard <eabarnard@gmail.com>
Date: Thu, 11 Apr 2019 13:47:27 +0100
Subject: [PATCH] Use SecRandomCopyBytes instead of /dev/urandom on MacOS

---
 src/libstd/build.rs         | 2 +-
 src/libstd/sys/unix/rand.rs | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/libstd/build.rs b/src/libstd/build.rs
index 726c27321538d..bb85ac4240286 100644
--- a/src/libstd/build.rs
+++ b/src/libstd/build.rs
@@ -30,7 +30,7 @@ fn main() {
         println!("cargo:rustc-link-lib=resolv");
     } else if target.contains("apple-darwin") {
         println!("cargo:rustc-link-lib=System");
-
+        println!("cargo:rustc-link-lib=framework=Security");
         // res_init and friends require -lresolv on macOS/iOS.
         // See #41582 and http://blog.achernya.com/2013/03/os-x-has-silly-libsystem.html
         println!("cargo:rustc-link-lib=resolv");
diff --git a/src/libstd/sys/unix/rand.rs b/src/libstd/sys/unix/rand.rs
index 122f22b37a26b..7934c7f0c820c 100644
--- a/src/libstd/sys/unix/rand.rs
+++ b/src/libstd/sys/unix/rand.rs
@@ -12,6 +12,7 @@ pub fn hashmap_random_keys() -> (u64, u64) {
 }
 
 #[cfg(all(unix,
+          not(target_os = "macos"),
           not(target_os = "ios"),
           not(target_os = "openbsd"),
           not(target_os = "freebsd"),
@@ -99,7 +100,7 @@ mod imp {
     }
 }
 
-#[cfg(target_os = "ios")]
+#[cfg(any(target_os = "macos", target_os = "ios"))]
 mod imp {
     use crate::io;
     use crate::ptr;