From 5d6b2ea5fb738f418953ada20f4f5d860e286d2c Mon Sep 17 00:00:00 2001
From: Yureka <yuka@yuka.dev>
Date: Tue, 7 Mar 2023 16:44:35 +0100
Subject: [PATCH] lkl: fix lkl-hijack on aarch64 with gcc10+

---
 pkgs/applications/virtualization/lkl/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/applications/virtualization/lkl/default.nix b/pkgs/applications/virtualization/lkl/default.nix
index 839022a8d551..f091aad6bf54 100644
--- a/pkgs/applications/virtualization/lkl/default.nix
+++ b/pkgs/applications/virtualization/lkl/default.nix
@@ -58,6 +58,10 @@ stdenv.mkDerivation rec {
   #   crypto/jitterentropy.c:54:3: error: #error "The CPU Jitter random number generator must not be compiled with optimizations. See documentation. Use the compiler switch -O0 for compiling jitterentropy.c."
   hardeningDisable = [ "format" "fortify" ];
 
+  # Fixes the following error when using liblkl-hijack.so on aarch64-linux:
+  # symbol lookup error: liblkl-hijack.so: undefined symbol: __aarch64_ldadd4_sync
+  env.NIX_CFLAGS_LINK = "-lgcc_s";
+
   makeFlags = [
     "-C tools/lkl"
     "CC=${stdenv.cc}/bin/${stdenv.cc.targetPrefix}cc"