From 17d541085db1c3dc0b90aa2e82e18a5f6fefb186 Mon Sep 17 00:00:00 2001
From: Fs <Fsu0413@vip.qq.com>
Date: Sat, 12 Oct 2024 18:26:25 +0800
Subject: [PATCH] kill add_subdirectory use

Signed-off-by: Fs <Fsu0413@vip.qq.com>
---
 CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c75cd20..30ac91f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,10 @@
 
 cmake_minimum_required(VERSION 3.22)
 
+if (DEFINED PROJECT_NAME)
+    message(FATAL_ERROR "Please build this project separately. add_subdirectory won't be supported.")
+endif()
+
 project(OpenSSL
     VERSION 1.0.2.21
     DESCRIPTION "TLS/SSL and crypto library"