From f54e4e1cbdb11821bb3f66b2b50c793399e0af84 Mon Sep 17 00:00:00 2001
From: barracuda156 <vital.had@gmail.com>
Date: Fri, 3 Nov 2023 13:40:25 +0800
Subject: [PATCH 5/5] semaphore: use libdispatch only where it actually exists

---
 src/util/semaphore.cc | 2 +-
 src/util/semaphore.h  | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git src/util/semaphore.cc src/util/semaphore.cc
index afed45e1..88107a36 100644
--- src/util/semaphore.cc
+++ src/util/semaphore.cc
@@ -13,7 +13,7 @@
 #include <windows.h>
 #endif
 
-#if defined(OS_MACOSX)
+#if defined(OS_MACOSX) && (MAC_OS_X_VERSION_MIN_REQUIRED > 1050 && !defined(__ppc__))
 
 Semaphore::Semaphore(int count) {
   native_handle_ = dispatch_semaphore_create(count);
diff --git src/util/semaphore.h src/util/semaphore.h
index 13a09927..e40aae0f 100644
--- src/util/semaphore.h
+++ src/util/semaphore.h
@@ -8,11 +8,15 @@
 #ifndef UTIL_SEMAPHORE_H_
 #define UTIL_SEMAPHORE_H_
 
+#ifdef __APPLE__
+#include <AvailabilityMacros.h>
+#endif
+
 #include "util/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
-#elif defined(OS_MACOSX)
+#elif defined(OS_MACOSX) && (MAC_OS_X_VERSION_MIN_REQUIRED > 1050 && !defined(__ppc__))
 #include <dispatch/dispatch.h>
 #elif defined(OS_ZOS)
 #include "zos-semaphore.h"
@@ -34,7 +38,7 @@ class Semaphore {
   // becomes positive and then decrements the counter.
   void Wait();
 
-#if defined(OS_MACOSX)
+#if defined(OS_MACOSX) && (MAC_OS_X_VERSION_MIN_REQUIRED > 1050 && !defined(__ppc__))
   using NativeHandle = dispatch_semaphore_t;
 #elif defined(OS_POSIX)
   using NativeHandle = sem_t;