From 31b0ba6846c2b251a80fbe3c6d1396a8bb99a18c Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Wed, 15 Nov 2023 22:05:13 -0500
Subject: [PATCH] groonga: fix build with clang 16

Prevent a warning about using a GNU extension from being treated as an
error by clang.
---
 pkgs/servers/search/groonga/default.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/pkgs/servers/search/groonga/default.nix b/pkgs/servers/search/groonga/default.nix
index 7b7717828e17..fbf9f06cff72 100644
--- a/pkgs/servers/search/groonga/default.nix
+++ b/pkgs/servers/search/groonga/default.nix
@@ -31,6 +31,11 @@ stdenv.mkDerivation rec {
        optional zlibSupport "--with-zlib"
     ++ optional lz4Support  "--with-lz4";
 
+  env = lib.optionalAttrs stdenv.cc.isClang {
+    # Prevent warning about using a GNU extension from being promoted to an error.
+    NIX_CFLAGS_COMPILE = "-Wno-error=gnu-folding-constant";
+  };
+
   doInstallCheck    = true;
   installCheckPhase = "$out/bin/groonga --version";