From 12cc39514eb10988058a0fefef14634e60f74516 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Sat, 19 Nov 2016 10:29:01 -0500
Subject: [PATCH] ios-cross: Document known prefixes

---
 pkgs/os-specific/darwin/ios-cross/default.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/darwin/ios-cross/default.nix b/pkgs/os-specific/darwin/ios-cross/default.nix
index cd4aed88cdd4..1d26a8b350be 100644
--- a/pkgs/os-specific/darwin/ios-cross/default.nix
+++ b/pkgs/os-specific/darwin/ios-cross/default.nix
@@ -6,7 +6,16 @@
 , stdenv
 , coreutils
 , gnugrep
-}: { prefix, arch, simulator ? false }: let
+}:
+
+/* As of this writing, known-good prefix/arch/simulator triples:
+ * aarch64-apple-darwin14 | arm64  | false
+ * arm-apple-darwin10     | armv7  | false
+ * i386-apple-darwin11    | i386   | true
+ * x86_64-apple-darwin14  | x86_64 | true
+ */
+
+{ prefix, arch, simulator ? false }: let
   sdkType = if simulator then "Simulator" else "OS";
 
   sdk = "/Applications/Xcode.app/Contents/Developer/Platforms/iPhone${sdkType}.platform/Developer/SDKs/iPhone${sdkType}10.0.sdk";