From 8fc20dfdca1c32e645dcf661f14f358d7ef8f2c4 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Mon, 20 Sep 2021 19:19:21 +0100
Subject: [PATCH] libebml: upstream fix for gcc-11

---
 pkgs/development/libraries/libebml/default.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/libebml/default.nix b/pkgs/development/libraries/libebml/default.nix
index 6a042012132e..84025e24f659 100644
--- a/pkgs/development/libraries/libebml/default.nix
+++ b/pkgs/development/libraries/libebml/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchFromGitHub, cmake, pkg-config }:
+{ lib, stdenv, fetchFromGitHub, fetchpatch, cmake, pkg-config }:
 
 stdenv.mkDerivation rec {
   pname = "libebml";
@@ -11,6 +11,15 @@ stdenv.mkDerivation rec {
     sha256 = "1hiilnabar826lfxsaflqjhgsdli6hzzhjv8q2nmw36fvvlyks25";
   };
 
+  patches = [
+    # Upstream fix for gcc-11
+    (fetchpatch {
+      url = "https://github.com/Matroska-Org/libebml/commit/f0bfd53647961e799a43d918c46cf3b6bff89806.patch";
+      sha256 = "1yd6rsds03kwx5jki4hihd2bpfh26g5l1pi82qzaqzarixdxwzvl";
+      excludes = [ "ChangeLog" ];
+    })
+  ];
+
   nativeBuildInputs = [ cmake pkg-config ];
 
   cmakeFlags = [