From 4b2eceaa3530e8cc1490d771d64492c4599e51f3 Mon Sep 17 00:00:00 2001
From: Moritz Angermann <moritz.angermann@gmail.com>
Date: Mon, 21 May 2018 19:26:25 +0800
Subject: [PATCH] ghc: fix dylib load command limits in compiler version 8.x

See https://phabricator.haskell.org/D4714 for the full details.
This will be part of ghc 8.6.

Closes https://github.com/NixOS/nixpkgs/pull/40877.
---
 pkgs/development/compilers/ghc/8.0.2.nix      |  3 ++-
 pkgs/development/compilers/ghc/8.2.2.nix      |  3 ++-
 pkgs/development/compilers/ghc/8.4.2.nix      |  3 ++-
 .../backport-dylib-command-size-limit.patch   | 24 +++++++++++++++++++
 4 files changed, 30 insertions(+), 3 deletions(-)
 create mode 100644 pkgs/development/compilers/ghc/backport-dylib-command-size-limit.patch

diff --git a/pkgs/development/compilers/ghc/8.0.2.nix b/pkgs/development/compilers/ghc/8.0.2.nix
index 7d11ffb66c60..4017a01e7027 100644
--- a/pkgs/development/compilers/ghc/8.0.2.nix
+++ b/pkgs/development/compilers/ghc/8.0.2.nix
@@ -84,7 +84,8 @@ stdenv.mkDerivation rec {
       extraPrefix = "libraries/Cabal/";
     })
   ] ++ stdenv.lib.optional stdenv.isLinux ./ghc-no-madv-free.patch
-    ++ stdenv.lib.optional stdenv.isDarwin ./ghc-8.0.2-no-cpp-warnings.patch;
+    ++ stdenv.lib.optional stdenv.isDarwin ./ghc-8.0.2-no-cpp-warnings.patch
+    ++ stdenv.lib.optional stdenv.isDarwin ./backport-dylib-command-size-limit.patch;
 
   # GHC is a bit confused on its cross terminology.
   preConfigure = ''
diff --git a/pkgs/development/compilers/ghc/8.2.2.nix b/pkgs/development/compilers/ghc/8.2.2.nix
index 192ff1ba207d..dcc2852a3413 100644
--- a/pkgs/development/compilers/ghc/8.2.2.nix
+++ b/pkgs/development/compilers/ghc/8.2.2.nix
@@ -95,7 +95,8 @@ stdenv.mkDerivation rec {
     (fetchpatch { # Backport of https://phabricator.haskell.org/D4388 for more determinism
       url = "https://github.com/shlevy/ghc/commit/fec1b8d3555c447c0d8da0e96b659be67c8bb4bc.patch";
       sha256 = "1lyysz6hfd1njcigpm8xppbnkadqfs0kvrp7s8vqgb38pjswj5hg";
-    });
+    })
+    ++ stdenv.lib.optional stdenv.isDarwin ./backport-dylib-command-size-limit.patch;
 
   postPatch = "patchShebangs .";
 
diff --git a/pkgs/development/compilers/ghc/8.4.2.nix b/pkgs/development/compilers/ghc/8.4.2.nix
index 94555482d28b..5d8adafa9a7f 100644
--- a/pkgs/development/compilers/ghc/8.4.2.nix
+++ b/pkgs/development/compilers/ghc/8.4.2.nix
@@ -86,7 +86,8 @@ stdenv.mkDerivation rec {
     sha256 = "0plzsbfaq6vb1023lsarrjglwgr9chld4q3m99rcfzx0yx5mibp3";
     extraPrefix = "utils/hsc2hs/";
     stripLen = 1;
-  })];
+  })]
+    ++ stdenv.lib.optional stdenv.isDarwin ./backport-dylib-command-size-limit.patch;
 
   postPatch = "patchShebangs .";
 
diff --git a/pkgs/development/compilers/ghc/backport-dylib-command-size-limit.patch b/pkgs/development/compilers/ghc/backport-dylib-command-size-limit.patch
new file mode 100644
index 000000000000..d0d94717d9c4
--- /dev/null
+++ b/pkgs/development/compilers/ghc/backport-dylib-command-size-limit.patch
@@ -0,0 +1,24 @@
+diff --git a/compiler/main/DriverPipeline.hs b/compiler/main/DriverPipeline.hs
+index acd0d61..3e83c15 100644
+--- a/compiler/main/DriverPipeline.hs
++++ b/compiler/main/DriverPipeline.hs
+@@ -1916,6 +1916,7 @@ linkBinary' staticLink dflags o_files dep_packages = do
+                       ++ pkg_framework_opts
+                       ++ debug_opts
+                       ++ thread_opts
++                      ++ (if (platformOS platform `elem` [OSDarwin]) then [ "-Wl,-dead_strip_dylibs" ] else [])
+                     ))
+ 
+ exeFileName :: Bool -> DynFlags -> FilePath
+diff --git a/compiler/main/SysTools.hs b/compiler/main/SysTools.hs
+index 1ab5b13..2ebbf51 100644
+--- a/compiler/main/SysTools.hs
++++ b/compiler/main/SysTools.hs
+@@ -1737,6 +1737,7 @@ linkDynLib dflags0 o_files dep_packages
+                  ++ map Option pkg_lib_path_opts
+                  ++ map Option pkg_link_opts
+                  ++ map Option pkg_framework_opts
++                 ++ [ Option "-Wl,-dead_strip_dylibs" ]
+               )
+         OSiOS -> throwGhcExceptionIO (ProgramError "dynamic libraries are not supported on iOS target")
+         _ -> do