From 3d7e7c53c5c2809df74a8f8d61a7f929e02a1ce6 Mon Sep 17 00:00:00 2001
From: Erik Schnetter <schnetter@gmail.com>
Date: Fri, 8 Jan 2016 22:33:55 -0500
Subject: [PATCH] Require libunwind

---
 var/spack/packages/gperftools/package.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/var/spack/packages/gperftools/package.py b/var/spack/packages/gperftools/package.py
index 3ee0de1bc43..22b2e6c424e 100644
--- a/var/spack/packages/gperftools/package.py
+++ b/var/spack/packages/gperftools/package.py
@@ -33,6 +33,8 @@ class Gperftools(Package):
     version('2.4', '2171cea3bbe053036fb5d5d25176a160', url="https://github.com/gperftools/gperftools/releases/download/gperftools-2.4/gperftools-2.4.tar.gz")
     version('2.3', 'f54dd119f0e46ac1f13264f8d97adf90', url="https://googledrive.com/host/0B6NtGsLhIcf7MWxMMF9JdTN3UVk/gperftools-2.3.tar.gz")
 
+    depends_on("libunwind")
+
     def install(self, spec, prefix):
         configure("--prefix=" + prefix)
         make()