From d2b670291fafe771501effe1e4917d92440bf390 Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Mon, 12 Jun 2023 01:12:50 -0400
Subject: darwin.Libsystem: get asl.h from upstream syslog sources

---
 .../darwin/apple-source-releases/Libsystem/default.nix     | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
index d9747b6cdc0..7f4fd0fe518 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/Libsystem/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, buildPackages, fetchzip
+{ lib, stdenv, buildPackages, fetchzip, fetchFromGitHub
 , appleDerivation', xnu, Libc, Libm, libdispatch, Libinfo
 , dyld, Csu, architecture, libclosure, CarbonHeaders, ncurses, CommonCrypto
 , copyfile, removefile, libresolvHeaders, libresolv, Libnotify, libmalloc, libplatform, libpthread
@@ -30,6 +30,15 @@ let
       fi
     '';
   };
+
+  # Libsystem needs `asl.h` from syslog. This is the version corresponding to the 10.12 SDK
+  # source release, but it hasn’t changed in newer versions.
+  syslog.src = fetchFromGitHub {
+    owner = "apple-oss-distributions";
+    repo = "syslog";
+    rev = "syslog-349.50.5";
+    hash = "sha256-tXLW/TNsluhO1X9Rv3FANyzyOe5TE/hZz0gVo7JGvHA=";
+  };
 in
 appleDerivation' stdenv {
   dontBuild = true;
@@ -63,6 +72,9 @@ appleDerivation' stdenv {
 
     (cd ${buildPackages.darwin.cctools.dev}/include/mach-o && find . -name '*.h' | copyHierarchy $out/include/mach-o)
 
+    # Copy `asl.h` from the syslog sources since it is no longer provided as part of Libc.
+    cp ${syslog.src}/libsystem_asl.tproj/include/asl.h $out/include
+
     mkdir -p $out/include/os
 
     cp ${darling.src}/src/libc/os/activity.h $out/include/os
-- 
cgit 1.4.1