From 04fa8e006cf662a9cdefa52162e006304ad8877d Mon Sep 17 00:00:00 2001
From: Daiderd Jordan <daiderd@gmail.com>
Date: Wed, 8 Feb 2017 21:16:01 +0100
Subject: [PATCH] darwin: add setup-hook to fix CF references

---
 .../setup-hooks/fix-darwin-frameworks.sh      | 31 +++++++++++++++++++
 pkgs/top-level/all-packages.nix               |  2 ++
 2 files changed, 33 insertions(+)
 create mode 100644 pkgs/build-support/setup-hooks/fix-darwin-frameworks.sh

diff --git a/pkgs/build-support/setup-hooks/fix-darwin-frameworks.sh b/pkgs/build-support/setup-hooks/fix-darwin-frameworks.sh
new file mode 100644
index 000000000000..e3a08b2598d9
--- /dev/null
+++ b/pkgs/build-support/setup-hooks/fix-darwin-frameworks.sh
@@ -0,0 +1,31 @@
+# On Mac OS X, frameworks are linked to the system CoreFoundation but
+# dynamic libraries built with nix use a pure version of CF this
+# causes segfaults for binaries that depend on it at runtime.  This
+# can be solved in two ways.
+# 1. Rewrite references to the pure CF using this setup hook, this
+# works for the simple case but this can still cause problems if other
+# dependencies (eg. python) use the pure CF.
+# 2. Create a wrapper for the binary that sets DYLD_FRAMEWORK_PATH to
+# /System/Library/Frameworks.  This will make everything load the
+# system's CoreFoundation framework while still keeping the
+# dependencies pure for other packages.
+
+fixupOutputHooks+=('fixDarwinFrameworksIn $prefix')
+
+fixDarwinFrameworks() {
+    local systemPrefix='/System/Library/Frameworks'
+
+    for fn in "$@"; do
+        if [ -L "$fn" ]; then continue; fi
+        echo "$fn: fixing dylib"
+
+        for framework in $(otool -L "$fn" | awk '/CoreFoundation\.framework/ {print $1}'); do
+          install_name_tool -change "$framework" "$systemPrefix/CoreFoundation.framework/Versions/A/CoreFoundation" "$fn" >&2
+        done
+    done
+}
+
+fixDarwinFrameworksIn() {
+    local dir="$1"
+    fixDarwinFrameworks $(find "$dir" -name "*.dylib")
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dc3924c5829e..f40f7d10577b 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -305,6 +305,8 @@ with pkgs;
 
   fixDarwinDylibNames = makeSetupHook { } ../build-support/setup-hooks/fix-darwin-dylib-names.sh;
 
+  fixDarwinFrameworks = makeSetupHook { } ../build-support/setup-hooks/fix-darwin-frameworks.sh;
+
   keepBuildTree = makeSetupHook { } ../build-support/setup-hooks/keep-build-tree.sh;
 
   enableGCOVInstrumentation = makeSetupHook { } ../build-support/setup-hooks/enable-coverage-instrumentation.sh;