This patch was downloaded from https://sft.its.cern.ch/jira/browse/ROOT-7047.
It fixes the build of clang 3.5 with GCC 5.  File paths have been adjusted.

From 00f3ed6eee41da871799ad0fd19153c7682d61fe Mon Sep 17 00:00:00 2001
From: Alexander Klimov <alserkli@inbox.ru>
Date: Mon, 26 Jan 2015 18:45:23 +0200
Subject: [PATCH] [ADT/IntrusiveRefCntPtr] Give friend access to
 IntrusiveRefCntPtr<X> so the relevant move constructor can
 access 'Obj'.

From LLVM upstream:
Author: Argyrios Kyrtzidis <akyrtzi@gmail.com>
Date:   Tue Sep 23 06:06:43 2014 +0000
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218295 91177308-0d34-0410-b5e6-96231b3b80d8
---
 interpreter/llvm/src/include/llvm/ADT/IntrusiveRefCntPtr.h |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/llvm/ADT/IntrusiveRefCntPtr.h b/include/llvm/ADT/IntrusiveRefCntPtr.h
index f9df378..c859c98 100644
--- a/include/llvm/ADT/IntrusiveRefCntPtr.h
+++ b/include/llvm/ADT/IntrusiveRefCntPtr.h
@@ -197,6 +197,9 @@ public:
   private:
     void retain() { if (Obj) IntrusiveRefCntPtrInfo<T>::retain(Obj); }
     void release() { if (Obj) IntrusiveRefCntPtrInfo<T>::release(Obj); }
+
+    template <typename X>
+    friend class IntrusiveRefCntPtr;
   };
 
   template<class T, class U>
-- 
1.7.10.4

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<tr><td><span title='2021-12-26 00:58:28 +0100'>2021-12-26</span></td><td><a href='/guix/commit/gnu/packages/datamash.scm?id=7ab055434af3aef6eae0095d8eb64e6ddeaba3b9'>gnu: Add Vnlog.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/datamash.scm (vnlog): New public variable.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/datamash.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-04-24 14:52:32 +0300'>2020-04-24</span></td><td><a href='/guix/commit/gnu/packages/datamash.scm?id=1e700c656a7a25ff2eb27fa552bc213cc50efb2a'>gnu: datamash: Update to 1.7.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/datamash.scm (datamash): Update to 1.7.
</span></span></td><td>Efraim Flashner</td></tr>