From 856f6c2aea9725809be0bb26e41ec4481b2584e5 Mon Sep 17 00:00:00 2001
From: David Guibert <david.guibert@gmail.com>
Date: Fri, 8 Mar 2013 09:08:57 +0100
Subject: [PATCH] fix iftop

---
 pkgs/tools/networking/iftop/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/tools/networking/iftop/default.nix b/pkgs/tools/networking/iftop/default.nix
index 730b60c7aec2..3a9c0e10a784 100644
--- a/pkgs/tools/networking/iftop/default.nix
+++ b/pkgs/tools/networking/iftop/default.nix
@@ -8,6 +8,10 @@ stdenv.mkDerivation rec {
     sha256 = "1b0fis53280qx85gldhmqfcpgyiwplzg43gxyngia1w3f1y58cnh";
   };
 
+  # Explicitly link against libgcc_s, to work around the infamous
+  # "libgcc_s.so.1 must be installed for pthread_cancel to work".
+  LDFLAGS = "-lgcc_s";
+
   preConfigure = ''
     cp ${automake}/share/automake*/config.{sub,guess} config
   '';