From b51ccf8fcdf89afed1eead4baa67a192de48a5f7 Mon Sep 17 00:00:00 2001
From: Martin Man <mman@martinman.net>
Date: Fri, 8 Mar 2024 15:51:59 +0100
Subject: [PATCH] use proper platform defines for IPv6 support

---
 CMakeLists.txt | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5dd891d..81ed23c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,7 +55,13 @@ if(HAS_SOCKLEN_T)
     add_definitions(-DHAS_SOCKLEN_T=1)
 endif()
 
-add_definitions(-D_GNU_SOURCE=1)
+if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
+    add_definitions(-D_GNU_SOURCE=1)
+endif()
+
+if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+    add_definitions(-D__APPLE_USE_RFC_3542=1)
+endif()
 
 include_directories(${PROJECT_SOURCE_DIR}/include)