From 1a57d96edd156958b12782e8c8b6a374142a7248 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Mon, 4 Jan 2021 17:50:29 +0100
Subject: [PATCH] efivar: fixup build on i686-linux

Fixes #108375.  (I built the ISO locally)
I believe the report is a false positive.
---
 pkgs/tools/system/efivar/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/tools/system/efivar/default.nix b/pkgs/tools/system/efivar/default.nix
index ea0ed8afcfd..afff716c249 100644
--- a/pkgs/tools/system/efivar/default.nix
+++ b/pkgs/tools/system/efivar/default.nix
@@ -39,8 +39,9 @@ stdenv.mkDerivation rec {
       sha256 = "1ajj11wwsvamfspq4naanvw08h63gr0g71q0dfbrrywrhc0jlmdw";
     })
   ];
-  # We have no LTO here since commit 22284b07.
+  # We have no LTO here since commit 22284b07.  With GCC 10 that triggers a warning.
   postPatch = if stdenv.isi686 then "sed '/^OPTIMIZE /s/-flto//' -i Make.defaults" else null;
+  NIX_CFLAGS_COMPILE = if stdenv.isi686 then "-Wno-error=stringop-truncation" else null;
 
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ popt ];