From 4f9f00fcc9ba5fce1bf476bf3e3200bdbed00f48 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Mon, 23 Jan 2017 18:35:03 -0500
Subject: [PATCH] Add function to build a ghc standalone archive (OSX/iOS only)

---
 pkgs/development/compilers/ghc/head.nix            | 13 ++++++++++++-
 .../darwin/ghc-standalone-archive/default.nix      | 14 ++++++++++++++
 pkgs/top-level/all-packages.nix                    |  2 ++
 3 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/os-specific/darwin/ghc-standalone-archive/default.nix

diff --git a/pkgs/development/compilers/ghc/head.nix b/pkgs/development/compilers/ghc/head.nix
index 971365eda48f..6ff29d600fc0 100644
--- a/pkgs/development/compilers/ghc/head.nix
+++ b/pkgs/development/compilers/ghc/head.nix
@@ -85,8 +85,17 @@ in stdenv.mkDerivation (rec {
 } // stdenv.lib.optionalAttrs (cross != null) {
   name = "${cross.config}-ghc-${version}";
 
+  patches = [ ./ios-linker.patch ];
+
   preConfigure = commonPreConfigure + ''
-    sed 's|#BuildFlavour  = quick-cross|BuildFlavour  = perf-cross|' mk/build.mk.sample > mk/build.mk
+    sed 's|#BuildFlavour  = quick-cross|BuildFlavour  = quick-cross|' mk/build.mk.sample > mk/build.mk
+    echo "GhcRtsCcOpts = -glldb -Og" >> mk/build.mk
+  '';
+
+  postUnpack = ''
+    mkdir -p $out/nix-support
+    mv $sourceRoot $out/nix-support/source
+    sourceRoot=$out/nix-support/source
   '';
 
   configureFlags = [
@@ -103,6 +112,8 @@ in stdenv.mkDerivation (rec {
 
   dontSetConfigureCross = true;
 
+  dontStrip = true;
+
   passthru = {
     inherit bootPkgs cross;
 
diff --git a/pkgs/os-specific/darwin/ghc-standalone-archive/default.nix b/pkgs/os-specific/darwin/ghc-standalone-archive/default.nix
new file mode 100644
index 000000000000..d23328d362e0
--- /dev/null
+++ b/pkgs/os-specific/darwin/ghc-standalone-archive/default.nix
@@ -0,0 +1,14 @@
+{ runCommand, cctools }:
+{ haskellPackages, src, deps ? p : [], name }: let
+  inherit (haskellPackages) ghc ghcWithPackages;
+  with-env = ghcWithPackages deps;
+  crossPrefix = if (ghc.cross or null) != null then "${ghc.cross.config}-" else "";
+  ghcName = "${crossPrefix}ghc";
+in runCommand name { buildInputs = [ with-env cctools ]; } ''
+  mkdir -p $out/lib
+  mkdir -p $out/include
+  ${ghcName} ${src} -staticlib -outputdir . -o $out/lib/${name}.a -stubdir $out/include
+  for file in ${ghc}/lib/${ghcName}-${ghc.version}/include/*; do
+    ln -sv $file $out/include
+  done
+''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 944f9c9d2258..8d2b4cf52014 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -18042,4 +18042,6 @@ in
   simplenote = callPackage ../applications/misc/simplenote { };
 
   hy = callPackage ../development/interpreters/hy {};
+
+  ghc-standalone-archive = callPackage ../os-specific/darwin/ghc-standalone-archive { inherit (darwin) cctools; };
 }