From aa00d5370824683587ec0c33fe6d880d4d77c466 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Sun, 13 Aug 2017 15:32:50 -0500
Subject: [PATCH] openssl 1.1.0: disable 'async' bits relating to
 setcontext/etc on musl

---
 pkgs/development/libraries/openssl/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/libraries/openssl/default.nix b/pkgs/development/libraries/openssl/default.nix
index 775e6056dff..cce205bb2c8 100644
--- a/pkgs/development/libraries/openssl/default.nix
+++ b/pkgs/development/libraries/openssl/default.nix
@@ -24,6 +24,12 @@ let
       ++ optional (versionOlder version "1.0.2" && hostPlatform.isDarwin)
            ./darwin-arch.patch;
 
+  postPatch = if (versionAtLeast version "1.1.0" && stdenv.isMusl) then ''
+    substituteInPlace crypto/async/arch/async_posix.h \
+      --replace '!defined(__ANDROID__) && !defined(__OpenBSD__)' \
+                '!defined(__ANDROID__) && !defined(__OpenBSD__) && 0'
+  '' else null;
+
     outputs = [ "bin" "dev" "out" "man" ];
     setOutputFlags = false;
     separateDebugInfo = hostPlatform.isLinux;