From b9d1dde37ba8f039c28b3d38e85aa3c919740a2a Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Wed, 10 May 2023 03:02:53 -0400
Subject: [PATCH] pkg-config: fix build with newer clang

Building pkg-config with newer versions of clang fails in the vendored
glib due to an incompatible conversion.ZZ
---
 pkgs/development/tools/misc/pkg-config/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/tools/misc/pkg-config/default.nix b/pkgs/development/tools/misc/pkg-config/default.nix
index d4feca6dfe6e5..b883dab6cc143 100644
--- a/pkgs/development/tools/misc/pkg-config/default.nix
+++ b/pkgs/development/tools/misc/pkg-config/default.nix
@@ -35,6 +35,9 @@ stdenv.mkDerivation rec {
          "ac_cv_func_posix_getgrgid_r=yes"
        ];
 
+  # Silence "incompatible integer to pointer conversion passing 'gsize'" when building with Clang.
+  env.NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-Wno-int-conversion";
+
   enableParallelBuilding = true;
   doCheck = true;