From 7b3036a4a2117378b199ab700c4ece2393a83df8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <vcunat@gmail.com>
Date: Fri, 10 Aug 2018 17:53:27 +0200
Subject: [PATCH] gdbm: avoid a warning on Darwin

This is just to minimize rebuilds.  The actual bugfix doesn't seem to
hurry, as the function has been returning void until now, so if the int
returned isn't a meaningful value in some cases, nothing should happen
yet.
---
 pkgs/development/libraries/gdbm/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/development/libraries/gdbm/default.nix b/pkgs/development/libraries/gdbm/default.nix
index ecab75fb0ea9..bbebcca6e2f0 100644
--- a/pkgs/development/libraries/gdbm/default.nix
+++ b/pkgs/development/libraries/gdbm/default.nix
@@ -2,6 +2,8 @@
 
 stdenv.mkDerivation rec {
   name = "gdbm-1.17";
+  # FIXME: remove on update to > 1.17
+  NIX_CFLAGS_COMPILE = if stdenv.cc.isClang then "-Wno-error=return-type" else null;
 
   src = fetchurl {
     url = "mirror://gnu/gdbm/${name}.tar.gz";