From 53b6a4f063bf14bec3d75d4052f347d0c7710d9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Llu=C3=ADs=20Batlle=20i=20Rossell?= <viric@viric.name>
Date: Wed, 13 May 2015 21:24:48 +0000
Subject: [PATCH] Hack for btrfsProgs in ARM, due to a gcc bug.

It fails to build otherwise:
/tmp/nix-build-btrfs-progs-4.0.drv-4/ccUNrySY.s:4014: Error: invalid operands (.text and *UND* sections) for `-'
---
 pkgs/tools/filesystems/btrfsprogs/default.nix | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/pkgs/tools/filesystems/btrfsprogs/default.nix b/pkgs/tools/filesystems/btrfsprogs/default.nix
index 9286d58482f..e2ed76494a1 100644
--- a/pkgs/tools/filesystems/btrfsprogs/default.nix
+++ b/pkgs/tools/filesystems/btrfsprogs/default.nix
@@ -3,7 +3,7 @@
 
 let version = "4.0"; in
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (rec {
   name = "btrfs-progs-${version}";
 
   src = fetchurl {
@@ -28,4 +28,7 @@ stdenv.mkDerivation rec {
     maintainers = with maintainers; [ raskin wkennington ];
     platforms = platforms.linux;
   };
-}
+} // (if stdenv.isArm then {
+  # gcc bug with -O1 on ARM
+  patchPhase = "sed -i s/-O1/-O2/ configure";
+} else {}))