From 55022869eb554725be89c59a9bad34b414dbea62 Mon Sep 17 00:00:00 2001
From: Robin Gloster <mail@glob.in>
Date: Mon, 26 Aug 2019 21:31:26 +0200
Subject: [PATCH] rubygems.grpc: fix build with gcc8

---
 pkgs/development/ruby-modules/gem-config/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/ruby-modules/gem-config/default.nix b/pkgs/development/ruby-modules/gem-config/default.nix
index 846305fa130..8656a3c0ef0 100644
--- a/pkgs/development/ruby-modules/gem-config/default.nix
+++ b/pkgs/development/ruby-modules/gem-config/default.nix
@@ -209,6 +209,7 @@ in
       "-Wno-error=cast-function-type"
       "-Wno-error=class-memaccess"
       "-Wno-error=ignored-qualifiers"
+      "-Wno-error=tautological-compare"
     ];
     dontBuild = false;
     postPatch = ''