From cc07ec890d0e7b31d7154f1bce6d3ba19aae5a1e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Mon, 30 Jan 2017 15:23:34 +0100
Subject: [PATCH] protobuf-3.x: fixup build with default gcc version

/cc @globin a3a0e8fe6.
http://hydra.nixos.org/build/47266085
---
 pkgs/development/libraries/protobuf/generic-v3.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/protobuf/generic-v3.nix b/pkgs/development/libraries/protobuf/generic-v3.nix
index 315608bf2b4f..39cf0a1741d6 100644
--- a/pkgs/development/libraries/protobuf/generic-v3.nix
+++ b/pkgs/development/libraries/protobuf/generic-v3.nix
@@ -34,7 +34,9 @@ stdenv.mkDerivation rec {
 
   doCheck = true;
 
-  NIX_CFLAGS_COMPILE = "-Wno-error=misleading-indentation";
+  NIX_CFLAGS_COMPILE = with stdenv.lib;
+    # gcc before 6 doesn't know this option
+    optionalString (hasPrefix "gcc-6" stdenv.cc.cc) "-Wno-error=misleading-indentation";
 
   meta = {
     description = "Google's data interchange format";