From eb1ce34d3d7dd7ecdd1fc17347bc12755313f050 Mon Sep 17 00:00:00 2001
From: Simon Chatterjee <code@chatts.net>
Date: Tue, 30 Jun 2020 10:03:01 +0100
Subject: [PATCH] gperftools: fix build on ARM

The use of libunwind by tcmalloc segfaults on ARM, so don't use that. See eg
https://www.dcddcc.com/blog/2018-06-09-building-mongodb-for-32-bit-ARM-on-debian-ubuntu.html#problem-6-tcmalloc-and-libunwind
---
 pkgs/development/libraries/gperftools/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/gperftools/default.nix b/pkgs/development/libraries/gperftools/default.nix
index 039231c01423..410e790255fa 100644
--- a/pkgs/development/libraries/gperftools/default.nix
+++ b/pkgs/development/libraries/gperftools/default.nix
@@ -8,7 +8,8 @@ stdenv.mkDerivation rec {
     sha256 = "1jb30zxmw7h9qxa8yi76rfxj4ssk60rv8n9y41m6pzqfk9lwis0y";
   };
 
-  buildInputs = stdenv.lib.optional stdenv.isLinux libunwind;
+  # tcmalloc uses libunwind in a way that works correctly only on non-ARM linux
+  buildInputs = stdenv.lib.optional (stdenv.isLinux && !(stdenv.isAarch64 || stdenv.isAarch32)) libunwind;
 
   prePatch = stdenv.lib.optionalString stdenv.isDarwin ''
     substituteInPlace Makefile.am --replace stdc++ c++