From 56b59c767b07aa4d29072a5de8deb06054a83fb9 Mon Sep 17 00:00:00 2001
From: Vicki Pfau <vi@endrift.com>
Date: Sun, 19 Jan 2025 18:41:06 -0800
Subject: [PATCH] CMake: Default macOS SDK version to OS version if not found

---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c199ddfd8..4cad4b818 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -236,6 +236,10 @@ endif()
 
 if(APPLE)
 	execute_process(COMMAND xcrun --show-sdk-version OUTPUT_VARIABLE MACOSX_SDK)
+	if(NOT MACOSX_SDK)
+		message(WARNING "Could not detect SDK version; defaulting to system version. Is SDKROOT set?")
+		set(MACOSX_SDK ${CMAKE_SYSTEM_VERSION})
+	endif()
 	add_definitions(-D_DARWIN_C_SOURCE)
 	list(APPEND OS_LIB "-framework Foundation")
 	if(NOT CMAKE_SYSTEM_VERSION VERSION_LESS "10.0") # Darwin 10.x is Mac OS X 10.6