From ebf04d83c028906570d6cd09fc29780732888a50 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Mon, 26 Mar 2018 13:50:01 -0500
Subject: [PATCH] musl-fts: add setup-hook to add -lfts

---
 pkgs/os-specific/linux/musl/fts-setup-hook.sh | 17 +++++++++++++++++
 pkgs/os-specific/linux/musl/fts.nix           |  2 ++
 2 files changed, 19 insertions(+)
 create mode 100644 pkgs/os-specific/linux/musl/fts-setup-hook.sh

diff --git a/pkgs/os-specific/linux/musl/fts-setup-hook.sh b/pkgs/os-specific/linux/musl/fts-setup-hook.sh
new file mode 100644
index 00000000000..3962dcb19a2
--- /dev/null
+++ b/pkgs/os-specific/linux/musl/fts-setup-hook.sh
@@ -0,0 +1,17 @@
+ftsLdflags() {
+    # The `depHostOffset` describes how the host platform of the dependencies
+    # are slid relative to the depending package. It is brought into scope of
+    # the environment hook defined as the role of the dependency being applied.
+    case $depHostOffset in
+        -1) local role='BUILD_' ;;
+        0)  local role='' ;;
+        1)  local role='TARGET_' ;;
+        *)  echo "cc-wrapper: Error: Cannot be used with $depHostOffset-offset deps" >2;
+            return 1 ;;
+    esac
+
+    export NIX_${role}LDFLAGS+=" -lfts"
+}
+
+addEnvHooks "$hostOffset" ftsLdflags
+
diff --git a/pkgs/os-specific/linux/musl/fts.nix b/pkgs/os-specific/linux/musl/fts.nix
index 083541e5e93..0f16e8cc79b 100644
--- a/pkgs/os-specific/linux/musl/fts.nix
+++ b/pkgs/os-specific/linux/musl/fts.nix
@@ -11,4 +11,6 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ autoreconfHook pkgconfig ];
+
+  setupHook = ./fts-setup-hook.sh;
 }